WO2024198735A1 - 一种混合动力变速器的液压控制系统、控制方法及汽车 - Google Patents

一种混合动力变速器的液压控制系统、控制方法及汽车 Download PDF

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Publication number
WO2024198735A1
WO2024198735A1 PCT/CN2024/076138 CN2024076138W WO2024198735A1 WO 2024198735 A1 WO2024198735 A1 WO 2024198735A1 CN 2024076138 W CN2024076138 W CN 2024076138W WO 2024198735 A1 WO2024198735 A1 WO 2024198735A1
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WO
WIPO (PCT)
Prior art keywords
oil
clutch
mechanical valve
oil circuit
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/076138
Other languages
English (en)
French (fr)
Inventor
刘飞刚
张洁
赵宗琴
黄聪颖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Changan Automobile Co Ltd
Original Assignee
Chongqing Changan Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Changan Automobile Co Ltd filed Critical Chongqing Changan Automobile Co Ltd
Priority to EP24777529.9A priority Critical patent/EP4632236A4/en
Priority to AU2024248682A priority patent/AU2024248682B2/en
Publication of WO2024198735A1 publication Critical patent/WO2024198735A1/zh
Priority to MX2025007783A priority patent/MX2025007783A/es
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021Generation or control of line pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08Servomotor systems incorporating electrically operated control means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00External control of clutches
    • F16D48/02Control by fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0412Cooling or heating; Control of temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
    • F16H57/0435Pressure control for supplying lubricant; Circuits or valves therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00External control of clutches
    • F16D48/02Control by fluid pressure
    • F16D2048/0227Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
    • F16D2048/0233Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
    • F16D2048/0245Electrically driven rotary pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00External control of clutches
    • F16D48/02Control by fluid pressure
    • F16D2048/0257Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0266Actively controlled valves between pressure source and actuation cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00External control of clutches
    • F16D48/02Control by fluid pressure
    • F16D2048/0257Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0287Hydraulic circuits combining clutch actuation and other hydraulic systems
    • F16D2048/029Hydraulic circuits combining clutch actuation with clutch lubrication or cooling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021Generation or control of line pressure
    • F16H61/0025Supply of control fluid; Pumps therefor
    • F16H2061/0034Accumulators for fluid pressure supply; Control thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021Generation or control of line pressure
    • F16H2061/0037Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles

Definitions

  • the present application belongs to the technical field of hybrid vehicle transmissions, and specifically relates to a hydraulic control system, a control method and a vehicle of a hybrid vehicle transmission.
  • the hybrid system of a hybrid vehicle includes components such as a generator and a drive motor, a clutch, a shaft gear, and a hydraulic system.
  • the generator is connected to the engine, and the fuel consumed by the engine can be used to generate electricity and stored in the power battery.
  • the drive motor is connected to the differential, and the differential is connected to the wheels through the drive shaft to directly drive the vehicle.
  • There is a clutch structure between the generator and the drive motor which can realize the connection between the generator and the drive motor, that is, the engine directly drives the vehicle.
  • the main working modes of the hybrid transmission are: series mode, when the power battery has sufficient power, the drive motor consumes the power battery energy to drive the vehicle.
  • the engine drives the generator to store power in the power battery, and the drive motor consumes the power battery energy to drive the vehicle.
  • the hydraulic system provides lubrication and cooling flow for the generator, drive motor, and shaft system; parallel mode, the clutch is engaged, the engine and generator are connected to the drive motor, at this time the engine can directly drive the vehicle, or the drive motor and engine can drive the vehicle together.
  • the hydraulic system provides lubrication and cooling flow for the generator, drive motor, shaft system, and clutch, and the clutch needs to be engaged.
  • the hydraulic system in the patent document (CN213920655U hybrid vehicle and its hydraulic system, gearbox, power system/CN107054056B hybrid vehicle) uses two switch solenoid valves to control one clutch.
  • the hydraulic system in the patent document (CN213920655U hybrid vehicle and its hydraulic system, gearbox, power system) uses three linear valves to control one clutch and one lubrication.
  • the above prior art solenoid valves are used in large quantities and are costly.
  • the purpose of the present application is to provide a hydraulic control system, a control method and a vehicle for a hybrid transmission with low cost and simple structure.
  • the present application provides a hydraulic control system of a hybrid transmission, comprising:
  • a single clutch is arranged between the generator and the drive motor of a hybrid vehicle, and the single clutch has a clutch lubrication lubricating oil circuit and a clutch pressure oil circuit;
  • a switch solenoid valve having two oil inlets and one oil outlet, wherein one oil inlet of the switch solenoid valve is connected to the oil tank, and the other oil inlet is connected to the oil pump;
  • a switching mechanical valve having two oil inlets and one oil outlet, one oil inlet of the switching mechanical valve being connected to the oil tank, the other oil inlet being connected to the oil pump, and the oil outlet of the switching mechanical valve being connected to the clutch pressure oil circuit;
  • a main pressure regulating mechanical valve which has an oil inlet and an oil outlet, the oil inlet of the main pressure regulating mechanical valve is connected to the oil pump, the oil outlet of the main pressure regulating mechanical valve is connected to the clutch lubricating oil circuit, and the feedback end of the main pressure regulating mechanical valve is connected to the oil pump;
  • the oil outlet of the switch solenoid valve is communicated with the control end of the switching mechanical valve and the control end of the main pressure regulating mechanical valve;
  • the controller controls the switch solenoid valve to adjust the oil supply pressure entering the clutch pressure oil circuit, so as to achieve the engagement or disconnection control of the single clutch.
  • the hydraulic control system further includes:
  • a main pressure switching mechanical valve which has two oil inlets and one oil outlet, one oil inlet of the main pressure switching mechanical valve is connected to the oil tank, and the other oil inlet is connected to the oil pump;
  • the oil outlet of the main pressure switching mechanical valve is connected to the control end of the main pressure regulating mechanical valve, and the control end of the main pressure switching mechanical valve is connected to the oil outlet of the switch solenoid valve, so as to realize indirect connection between the control end of the main pressure regulating mechanical valve and the oil outlet of the switch solenoid valve.
  • the hydraulic control system further includes:
  • An accumulator connected to the oil circuit between the switching mechanical valve and the clutch pressure oil circuit.
  • a damping hole is arranged in the oil circuit between the switching mechanical valve and the oil pump.
  • the present application provides a hydraulic control system of a hybrid transmission, the hydraulic control system comprising:
  • a dual clutch arranged between a generator and a drive motor of a hybrid vehicle, the dual clutch having a clutch lubrication oil circuit and two clutch pressure oil circuits;
  • Two switch solenoid valves each having two oil inlets and one oil outlet; one oil inlet of each switch solenoid valve is connected to the oil tank, and the other oil inlet is connected to the oil pump;
  • Two switching mechanical valves each of which has two oil inlets and one oil outlet, one oil inlet of each switching mechanical valve is connected to the oil tank, the other oil inlet is connected to the oil pump, and the oil outlet of each switching mechanical valve is connected to one of the clutch pressure oil circuits;
  • a main pressure switching mechanical valve which has two oil inlets, one oil outlet and two control ends, one oil inlet of the main pressure switching mechanical valve is connected to the oil tank, the other oil inlet is connected to the oil pump, and the oil outlet of the main pressure switching mechanical valve is connected to the control end of the main pressure regulating mechanical valve;
  • each switch solenoid valve is respectively connected to a control end of a switching mechanical valve and a control end of the main pressure switching mechanical valve;
  • the controller controls each of the switch solenoid valves to adjust the oil supply pressure entering the clutch pressure oil circuit, so as to achieve the engagement or disconnection control of the dual clutch.
  • the hydraulic control system further includes:
  • An accumulator connected to the oil circuit between the switching mechanical valve and the clutch pressure oil circuit.
  • a damping hole is arranged in the oil circuit between the switching mechanical valve and the oil pump.
  • the present application also provides a control method for a hydraulic control system of a hybrid transmission, which is applied to the hydraulic control system of the hybrid transmission.
  • the control method for the hydraulic control system includes:
  • the controller controls the oil outlet of the switch solenoid valve to be connected to the oil tank, so that the main pressure regulating mechanical valve connects the oil pump and the clutch lubricating oil circuit, and the switching mechanical valve connects the clutch pressure oil circuit and the oil tank, so that the oil supply pressure entering the clutch pressure oil circuit is 0 bar, thereby realizing the disconnection of the single clutch;
  • the controller controls the oil outlet of the switch solenoid valve and the oil pump to be connected, so that the main pressure regulating mechanical valve connects the oil pump and the clutch lubrication oil circuit, and the switching mechanical valve connects the clutch pressure oil circuit and the oil pump, so that the oil supply pressure entering the clutch pressure oil circuit is the preset high pressure, thereby realizing the engagement of the single clutch.
  • the present application also provides a control method for a hydraulic control system of a hybrid transmission, which is applied to the hydraulic control system of the hybrid transmission.
  • the control method for the hydraulic control system includes:
  • the controller controls the oil outlets of the two switch solenoid valves to be connected to the oil tank, so that the main pressure regulating mechanical valve connects the oil pump and the clutch lubricating oil circuit, and the two switching mechanical valves connect the corresponding clutch pressure oil circuits to the oil tank, so that the oil supply pressure entering each clutch pressure oil circuit is 0 bar, thereby realizing the disconnection of the dual clutch;
  • the controller controls the oil outlet of the switch solenoid valve corresponding to the target clutch to be connected to the oil pump, so that the main pressure regulating mechanical valve connects the oil pump and the clutch lubricating oil circuit, and the switching mechanical valve corresponding to the target clutch connects the clutch pressure oil circuit and the oil pump, so that the oil supply pressure entering the clutch pressure oil circuit corresponding to the target clutch is a preset high pressure, thereby achieving the engagement of the target clutch;
  • the controller also controls the oil outlet and the oil tank of the switching solenoid valve corresponding to the remaining clutch, so that the switching mechanical valve corresponding to the remaining clutch connects the corresponding clutch pressure oil circuit and the oil tank, so that the oil supply pressure entering the clutch pressure oil circuit corresponding to the remaining clutch is 0 bar, thereby realizing the disconnection of the remaining clutch.
  • the present application also provides a vehicle, comprising the hydraulic control system of the hybrid transmission or the hydraulic control system of the hybrid transmission.
  • the present application uses one switch solenoid valve to control the oil supply pressure of the clutch pressure oil circuit of one clutch, and uses two switch solenoid valves to control the oil supply pressure of the clutch pressure oil circuits of two clutches, which can meet the needs of single-speed and two-speed hybrid transmissions.
  • at least one solenoid valve is reduced, so that the hydraulic system structure is further simplified and the cost is further reduced.
  • FIG1 is a structural diagram of a hydraulic control system in which two switch solenoid valves control two clutches in this embodiment
  • FIG2 is a structural diagram of a hydraulic control system in which a switch solenoid valve controls a clutch in this embodiment
  • Fig. 3 is a structural diagram of a hydraulic control system of a clutch controlled by a switch solenoid valve, which is further simplified in the present embodiment; in the figure: 1-first oil circuit, 2-second oil circuit, 3-third oil circuit, 4-fourth oil circuit, 5-fifth oil circuit, 6-sixth oil circuit, 7-seventh oil circuit, 8-eighth oil circuit, 9-ninth oil circuit, 10-tenth oil circuit, 11-eleventh oil circuit, 12-twelfth oil circuit, 13-thirteenth oil circuit, 14-fourteenth oil circuit, 15-fifteenth oil circuit, 16-sixteenth oil circuit, 17-seventeenth oil circuit, 18-eighteenth oil circuit, 19-nineteenth oil circuit.
  • this embodiment provides a hydraulic control system of a hybrid transmission, the hydraulic control system comprising:
  • the double clutch is arranged between the generator and the drive motor of the hybrid vehicle, and the double clutch has a clutch lubrication oil circuit 51 (corresponding to the cooling lubrication in FIG. 1 ) and two clutch pressure oil circuits (corresponding to the first clutch pressure oil circuit 52 and the second clutch pressure oil circuit 53, the first clutch pressure oil circuit 52 specifically corresponds to the clutch 1 pressure in FIG. 1, and the second clutch pressure oil circuit 53 specifically corresponds to the clutch 2 pressure);
  • each switch solenoid valve has two oil inlets and one oil outlet; one oil inlet of each switch solenoid valve is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33;
  • each switching mechanical valve has two oil inlets and one oil outlet, one oil inlet of each switching mechanical valve is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33 (from FIG.
  • one oil inlet of the first switching mechanical valve 38 is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33, and similarly, one oil inlet of the second switching mechanical valve 39 is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33), and the oil outlet of each switching mechanical valve is respectively connected to one of the clutch pressure oil circuits (specifically, the oil outlet of the first switching mechanical valve 38 is connected to the first clutch pressure oil circuit 52, and the oil outlet of the second switching mechanical valve 39 is connected to the second clutch pressure oil circuit 53);
  • a main pressure regulating mechanical valve 34 has an oil inlet and an oil outlet.
  • the oil inlet of the main pressure regulating mechanical valve 34 is connected to the oil pump 33, the oil outlet of the main pressure regulating mechanical valve 34 is connected to the clutch lubricating oil circuit 51, and the feedback end of the main pressure regulating mechanical valve 34 is connected to the oil pump 33;
  • the main pressure switching mechanical valve 35 has two oil inlets, one oil outlet and two control ends. One oil inlet of the main pressure switching mechanical valve 35 is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33. The oil outlet of the main pressure switching mechanical valve 35 is connected to the control end of the main pressure regulating mechanical valve 34.
  • each of the switch solenoid valves is respectively connected to a control end of a switch mechanical valve and a control end of the main pressure switch mechanical valve 35 (that is, the oil outlet of the first switch solenoid valve 36 is connected to the control end of the first switch mechanical valve 38 and the first control end 351 of the main pressure switch control valve 35, and the oil outlet of the second switch solenoid valve 37 is connected to the second switch mechanical valve 39 and the second control end 352 of the main pressure switch control valve 35);
  • the controller controls each of the switch solenoid valves to adjust the oil supply pressure in the clutch pressure oil circuit to achieve the engagement or disconnection control of the dual clutch.
  • the specific control principle of the controller for each switch solenoid valve is as follows:
  • the controller controls the oil outlets of the two switch solenoid valves to be connected to the oil tank 31, so that the main pressure regulating mechanical valve connects the oil pump 33 and the clutch lubricating oil circuit 51, and the two switching mechanical valves connect the corresponding clutch pressure oil circuits to the oil tank 31, so that the oil supply pressure entering each clutch pressure oil circuit is 0 bar, thereby realizing the disconnection of the dual clutch;
  • the controller controls the oil outlet of the switch solenoid valve corresponding to the target clutch and the oil pump 33 to be connected, so that the main pressure regulating mechanical valve 34 connects the oil pump 33 and the clutch lubricating oil circuit 51, and the switching mechanical valve corresponding to the target clutch connects the clutch pressure oil circuit and the oil pump 33, so that the oil supply pressure entering the clutch pressure oil circuit corresponding to the target clutch is the preset high pressure, thereby realizing the engagement of the target clutch; at the same time, the controller also controls the oil outlet of the switch solenoid valve corresponding to the remaining clutches and the oil tank 31 to be connected, so that the switching mechanical valves corresponding to the remaining clutches connect the corresponding clutch pressure oil circuits and the oil tank 31, so that the oil supply pressure entering the clutch pressure oil circuits corresponding to the remaining clutches is 0 bar, thereby realizing the disconnection of the remaining clutches
  • the hydraulic control system in this embodiment includes a first oil circuit 1, a second oil circuit 2, a third oil circuit 3, a fourth oil circuit 4, a fifth oil circuit 5, a sixth oil circuit 6, a seventh oil circuit 7, an eighth oil circuit 8, a ninth oil circuit 9, a tenth oil circuit 10, an eleventh oil circuit 11, a twelfth oil circuit 12, a thirteenth oil circuit 13, a fourteenth oil circuit 14, a fifteenth oil circuit 15, a sixteenth oil circuit 16, a seventeenth oil circuit 17, an eighteenth oil circuit 18, a nineteenth oil circuit 19, a first damping hole 21, a second damping hole 22, a
  • the nylon 22 the oil tank 31, the filter 32, the oil pump 33, the main pressure regulating mechanical valve 34, the main pressure switching mechanical valve 35, the first control end 351 of the main pressure switching mechanical valve, the second control end 352 of the main pressure switching mechanical valve, the first switch solenoid valve 36, the second switch solenoid valve 37, the first switching mechanical valve 38, the second switching mechanical valve 39, the first
  • the filter 32 is connected to the oil tank 31 through the first oil circuit 1, and the oil inlet of the oil pump 33 is connected to the filter 32 through the second oil circuit 2.
  • the oil inlet of the main pressure regulating mechanical valve 34 is connected to the outlet of the oil pump 33 through the third oil circuit 3, and the third oil circuit 3 is connected to the fourth oil circuit 4, the fifth oil circuit 5, the sixth oil circuit 6, the seventh oil circuit 7, the eighth oil circuit 8, and the ninth oil circuit 9.
  • the right feedback end of the main pressure regulating mechanical valve 34 is connected to the fifth oil circuit 5, and the left control end of the main pressure regulating mechanical valve 34 is connected to the oil outlet of the main pressure switching mechanical valve 35 through the thirteenth oil circuit 13.
  • the oil outlet of the main pressure regulating mechanical valve 34 is connected to the twelfth oil circuit 12, and the twelfth oil circuit 12 is connected to the clutch lubricating oil circuit 51.
  • the oil inlet of the main pressure switching mechanical valve 35 is connected to the fourth oil circuit 4 through the sixth oil circuit 6, the first control end 351 of the main pressure switching mechanical valve 35 is connected to the tenth oil circuit 10 through the fourteenth oil circuit 14, the second control end 352 of the main pressure switching mechanical valve 35 is connected to the eleventh oil circuit 11 through the fifteenth oil circuit 15, and the first control end 351 of the main pressure switching mechanical valve 35 and the second control end 352 of the main pressure switching mechanical valve 35 are not connected to each other.
  • the oil inlet of the first switch solenoid valve 36 is connected to the fourth oil circuit 4 through the eighth oil circuit 8, and the oil outlet of the first switch solenoid valve 36 is connected to the right control end of the first switch mechanical valve 38 through the tenth oil circuit 10.
  • the oil inlet of the first switching mechanical valve 38 is connected to the fourth oil circuit 4 through the seventh oil circuit 7, the first damping hole 21 is arranged in the seventh oil circuit 7, the oil outlet of the first switching mechanical valve 38 is connected to the sixteenth oil circuit 16, the sixteenth oil circuit 16 is connected to the first accumulator 40 through the eighteenth oil circuit 18, and the sixteenth oil circuit 16 is connected to the first clutch pressure oil circuit 52.
  • the oil inlet of the second switching solenoid valve 37 is connected to the fourth oil circuit 4, and the oil outlet of the second switching solenoid valve 37 is connected to the second switching solenoid valve 37 through the eleventh oil circuit 11.
  • the oil inlet of the second switching mechanical valve 39 is connected to the fourth oil circuit 4 through the ninth oil circuit 9, the second damping hole 22 is arranged in the ninth oil circuit 9, the oil outlet of the second switching mechanical valve 39 is connected to the seventeenth oil circuit 17, the seventeenth oil circuit 17 is connected to the second accumulator 41 through the nineteenth oil circuit 19, and the seventeenth oil circuit 17 is connected to the second clutch pressure oil circuit 53.
  • the main pressure regulating mechanical valve 34 is a two-position two-way mechanical valve.
  • the third oil circuit 3 is disconnected from the twelfth oil circuit 12.
  • the main pressure regulating mechanical valve 34 is in the right end working position, the third oil circuit 3 is connected to the twelfth oil circuit 12.
  • the main pressure switching mechanical valve 35 is a two-position three-way mechanical valve.
  • the main pressure switching mechanical valve 35 When the main pressure switching mechanical valve 35 is in the left end working position, the thirteenth oil circuit 13 is connected to the oil tank 31, and the thirteenth oil circuit 13 is disconnected from the sixth oil circuit 6.
  • the main pressure switching mechanical valve 35 When the main pressure switching mechanical valve 35 is in the right end working position, the thirteenth oil circuit 13 is disconnected from the oil tank 31, and the thirteenth oil circuit 13 is connected to the sixth oil circuit 6.
  • the first switch solenoid valve 36 and the second switch solenoid valve 37 are both two-position three-way switch solenoid valves.
  • the first switch solenoid valve 36 When the first switch solenoid valve 36 is not powered, the first switch solenoid valve 36 is in the right end working position, at which time the tenth oil circuit 10 is connected to the oil tank 31, and the tenth oil circuit 10 is disconnected from the eighth oil circuit 8 and the fourth oil circuit 4.
  • the first switch solenoid valve 36 When the first switch solenoid valve 36 is powered, the first switch solenoid valve 36 is in the left end working position, at which time the tenth oil circuit 10 is disconnected from the oil tank 31, and the tenth oil circuit 10 is connected to the eighth oil circuit 8 and the fourth oil circuit 4; when the second switch solenoid valve 37 is not powered, the second switch solenoid valve 37 is in the right end working position, at which time the eleventh oil circuit 11 is connected to the oil tank 31, and the eleventh oil circuit 11 is disconnected from the fourth oil circuit 4. When the second switch solenoid valve 37 is powered, the second switch solenoid valve 37 is in the left end working position, at which time the eleventh oil circuit 11 is disconnected from the oil tank 31, and the eleventh oil circuit 11 is connected to the fourth oil circuit 4.
  • the first switching mechanical valve 38 is a two-position three-way mechanical valve.
  • the sixteenth oil circuit 16 is connected to the oil tank 31, and the sixteenth oil circuit 16 is disconnected from the seventh oil circuit 7.
  • the sixteenth oil circuit 16 is disconnected from the oil tank 31, and the sixteenth oil circuit 16 is connected to the seventh oil circuit 7.
  • the second switching mechanical valve 39 is a two-position three-way mechanical valve.
  • the seventeenth oil circuit 17 is connected to the oil tank 31, and the seventeenth oil circuit 17 is disconnected from the ninth oil circuit 9.
  • the second switching mechanical valve 39 is in the right end working position, the seventeenth oil circuit 17 is disconnected from the oil tank 31, and the seventeenth oil circuit 17 is connected to the ninth oil circuit 9.
  • FIG1 it is a structural diagram of a hybrid hydraulic control system in which two switch solenoid valves control two clutches.
  • the clutch When the hybrid transmission is in the series mode, the clutch is disconnected, the oil pump 33 is working, and the working oil in the oil tank 31 passes through the first oil path 1 and the filter 32 and enters the inlet of the oil pump 33 .
  • the working oil at the outlet of the oil pump 33 enters the right feedback end of the main pressure regulating mechanical valve 34 through the third oil circuit 3, the fourth oil circuit 4, and the fifth oil circuit 5, and the working oil at the outlet of the oil pump 33 enters the inlet of the first switch solenoid valve 36 and the second switch solenoid valve 37 through the third oil circuit 3, the fourth oil circuit 4, and the eighth oil circuit 8.
  • the first switch solenoid valve 36 and the second switch solenoid valve 37 are not powered, and the first switch solenoid valve 36 and the second switch solenoid valve 37 are both in the right end working position.
  • the tenth oil circuit 10 and the fourteenth oil circuit 14 are connected to the oil tank 31, and the tenth oil circuit 10 and the fourteenth oil circuit 14 are disconnected from the eighth oil circuit 8 and the fourth oil circuit 4.
  • the control oil returns to the oil tank 31 through the first switch solenoid valve 36 and the second switch solenoid valve 37, and the eleventh oil circuit 11 and the fifteenth oil circuit 15 are connected to the oil tank 31, and the eleventh oil circuit 11 and the fifteenth oil circuit 15 are disconnected from the fourth oil circuit 4.
  • the pressure in the tenth oil circuit 10, the fourteenth oil circuit 14, the eleventh oil circuit 11, and the fifteenth oil circuit 15 is 0 bar.
  • the spring of the first switching mechanical valve 38 makes the first switching mechanical valve 38 in the left end working position, at this time, the sixteenth oil circuit 16 and the first clutch pressure oil circuit 52 are connected to the oil tank 31, the pressure in the first clutch pressure oil circuit 52 is 0 bar, and the first clutch pressure oil circuit 52 is disconnected;
  • the spring of the second switching mechanical valve 39 makes the second switching mechanical valve 39 in the left end working position, at this time, the seventeenth oil circuit 17 and the second clutch pressure oil circuit 53 are connected to the oil tank 31, the pressure in the second clutch pressure oil circuit 53 is 0 bar, and the second clutch pressure oil circuit 53 is disconnected;
  • the spring of the main pressure switching mechanical valve 35 makes the main pressure switching mechanical valve 35 in the left end working position, at this time, the thirteenth oil circuit 13 is connected to the oil tank 31, and the thirteenth oil circuit 13 is disconnected from the sixth oil circuit 6.
  • the pressure in the thirteenth oil circuit 13 is 0 bar
  • the pressure at the right feedback end of the main pressure regulating mechanical valve 34 is balanced with the spring force of the main pressure regulating mechanical valve 34
  • the main pressure regulating mechanical valve 34 is in the right working position
  • the third oil circuit 3 is connected with the twelfth oil circuit 12
  • the pressure in the working oil in the third oil circuit 3 and the fourth oil circuit 4 is kept at a relatively low pressure value, such as a typical design value of 2.5 bar.
  • the pressure control of the first clutch pressure oil circuit 52 when the hybrid transmission receives a request to enter parallel connection, the first clutch pressure oil circuit 52 needs to be engaged.
  • the second switch solenoid valve 37 is not powered, and the second switch solenoid valve 37 is in the right end working position. At this time, the eleventh oil circuit 11 and the fifteenth oil circuit 15 are connected to the oil tank 31, and the pressure in the eleventh oil circuit 11 is 0 bar.
  • the spring action of the second switching mechanical valve 39 makes the second switching mechanical valve 39 in the left end working position. At this time, the seventeenth oil circuit 17 and the second clutch pressure oil circuit 53 are connected to the oil tank 31, and the pressure in the second clutch pressure oil circuit 53 is 0 bar.
  • the first switch solenoid valve 36 is powered, and the first switch solenoid valve 36 is in the left end working position.
  • the tenth oil circuit 10 is disconnected from the oil tank 31, the tenth oil circuit 10 and the fourteenth oil circuit 14 are connected to the eighth oil circuit 8 and the fourth oil circuit 4, and the mechanical oil pump 33 outlet
  • the working oil enters the first control end 351 of the main pressure switching mechanical valve and the right control end of the first switching mechanical valve 38 through the third oil circuit 3, the fourth oil circuit 4, the eighth oil circuit 8, the tenth oil circuit 10 and the fourteenth oil circuit 14.
  • the pressure in the fourteenth oil circuit 14 and the tenth oil circuit 10 is 2.5 bar, which is greater than the spring force of the main pressure switching mechanical valve 35 and the first switching mechanical valve 38.
  • the main pressure switching mechanical valve 35 and the first switching mechanical valve 38 are both in the right end working position.
  • the thirteenth oil circuit 13 is connected with the sixth oil circuit 6, and the seventh oil circuit 7 is connected with the sixteenth oil circuit 16. Therefore, the pressure at the left control end of the main pressure regulating mechanical valve 34 and the spring force of the main pressure regulating mechanical valve 34 are balanced with the pressure at the right feedback end.
  • the second switch solenoid valve 37 is powered, and the second switch solenoid valve 37 is in the left working position.
  • the eleventh oil circuit 11 is disconnected from the oil tank 31, and the eleventh oil circuit 11 and the fifteenth oil circuit 15 are connected to the fourth oil circuit 4.
  • the working oil at the outlet of the mechanical oil pump 33 enters the second control end 352 of the main pressure switching mechanical valve and the control end of the second switching mechanical valve 39 through the third oil circuit 3, the fourth oil circuit 4, the eleventh oil circuit 11, and the fifteenth oil circuit 15.
  • the pressure in the fifteenth oil circuit 15 and the eleventh oil circuit 11 is 2.5 bar, which is greater than the spring force of the main pressure switching mechanical valve 35 and the second switching mechanical valve 39.
  • the working position of the main pressure regulating mechanical valve 34 is in the right position, the third oil circuit 3 is connected with the twelfth oil circuit 12, and the pressure of the working oil in the third oil circuit 3 and the fourth oil circuit 4, the fifth oil circuit 5, the sixth oil circuit 6, the seventh oil circuit 7, the eighth oil circuit 8, and the ninth oil circuit 9 is adjusted to a high pressure value, such as a typical design value of 10 bar.
  • the ninth oil circuit 9 is connected with the seventeenth oil circuit 17, and thus connected with the second clutch pressure oil circuit 53, and the working oil begins to enter the second clutch pressure oil circuit 53.
  • the second damping hole 22 is set in the ninth oil circuit 9 to control the oil filling flow of the second clutch pressure oil circuit 53.
  • the second accumulator 41 is set to communicate with the second clutch pressure oil circuit 53 through the nineteenth oil circuit 19 and the seventeenth oil circuit 17, effectively reducing the pressure shock of the clutch. After a certain period of time, the pressure in the second clutch pressure oil circuit 53 reaches the target 10 bar, and the second clutch pressure oil circuit 53 is combined. Therefore, the pressure of the working oil in the third oil circuit 3 and the fourth oil circuit 4, the fifth oil circuit 5, the sixth oil circuit 6, the seventh oil circuit 7, the eighth oil circuit 8, the ninth oil circuit 9 and the second clutch pressure oil circuit 53 is controlled by controlling the switch second switch solenoid valve 37. In this state, the pressure in the second clutch pressure oil circuit 53 is 10 bar, and the second clutch pressure oil circuit 53 is in a combined state.
  • the oil pump 33 provides pressure for the second clutch pressure oil circuit 53 and provides flow for the clutch lubricating oil circuit 51.
  • FIG2 it is a structural diagram of a hybrid hydraulic control system in which a switch solenoid valve controls a clutch. Since the number of clutches controlled by the system is reduced, compared with the first set of structures (as shown in FIG1 ), the second set of structures (as shown in FIG2 ) reduces the eighth oil circuit 8, the ninth oil circuit 9, the eleventh oil circuit 11, the fifteenth oil circuit 15, the seventeenth oil circuit 17, the nineteenth oil circuit 19, the second damping hole 22, the second switch solenoid valve 37, the second switching mechanical valve 39, the second accumulator 41, the second clutch pressure oil circuit 53, and the second control end 352 of the main pressure switching mechanical valve.
  • the oil inlet of the first switch solenoid valve 36 is directly connected to the fourth oil circuit 4, and the connection relationship of other components is the same as that of the first set of structures (as shown in FIG1 ).
  • FIG3 the structural diagram of a hybrid hydraulic control system in which a switch solenoid valve controls a clutch is further simplified.
  • the third set of structures reduces the main pressure switching mechanical valve 35, the first control end 351 of the main pressure switching mechanical valve, the sixth oil circuit 6, and the fourteenth oil circuit 14.
  • the thirteenth oil circuit 13 is connected to the tenth oil circuit 10, and the connection relationship of other components is the same as that of the second set of structures (as shown in FIG2 ).
  • FIG2 is a structural diagram of a hybrid hydraulic control system in which a switch solenoid valve controls a clutch.
  • the number of clutches controlled by the system in the second set of structures is reduced to one, and the system only controls the first clutch pressure oil circuit 52.
  • the control principle and process of the second set of structures are the same as those of the first set of structures (as shown in FIG1).
  • the hydraulic control system includes: a controller; an oil tank 31 and an oil pump 33 connected thereto; a single clutch arranged between the generator and the drive motor of the hybrid vehicle, the single clutch having a clutch lubrication oil circuit 51 (corresponding to the cooling lubrication in FIG3) and a first clutch pressure oil circuit 52 (corresponding to the clutch 1 pressure in FIG3); a first switch solenoid valve 36, which has two oil inlets and one oil outlet, and one of the first switch solenoid valves 36 An oil inlet is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33; a first switching mechanical valve 38, which has two oil inlets and one oil outlet, one oil inlet of the first switching mechanical valve 38 is connected to the oil tank 31, and the other oil inlet is connected to the oil pump 33, and the oil outlet of the first switching mechanical valve 38 is connected to the clutch pressure oil circuit; a main pressure regulating mechanical valve 34, which has an oil inlet and an oil outlet, the oil inlet of the main pressure regulating mechanical valve 34 is
  • FIG3 is a further simplified structural diagram of a hybrid hydraulic control system in which a switch solenoid valve controls a clutch.
  • the third structure reduces the main pressure switching mechanical valve 35 , the first control end 351 of the main pressure switching mechanical valve, the sixth oil circuit 6 , and the fourteenth oil circuit 14 , and the thirteenth oil circuit 13 is connected to the tenth oil circuit 10 .
  • the hydraulic control system includes: a controller; an oil tank 31 and an oil pump 33 connected thereto; a single clutch arranged between the generator and the drive motor of the hybrid vehicle, the single clutch having a clutch lubrication oil circuit 51 (corresponding to the cooling lubrication in FIG.
  • first clutch pressure oil circuit 52 (corresponding to the clutch 1 pressure in FIG. 3 ) and a first clutch pressure oil circuit 52 (corresponding to the clutch 1 pressure in FIG. 3 ); a first switch solenoid valve 36 having two oil inlets and one oil outlet, one oil inlet of the first switch solenoid valve 36 being connected to the oil tank 31, and the other oil inlet being connected to the oil pump 33; a first switching mechanical valve 38 having two oil inlets and one oil outlet, one oil inlet of the first switching mechanical valve 38 being connected to the oil tank 31, and the other oil inlet being connected to the oil pump 33.
  • the oil outlet of the first switching mechanical valve 38 is connected to the clutch pressure oil circuit;
  • the main pressure regulating mechanical valve 34 has an oil inlet and an oil outlet, the oil inlet of the main pressure regulating mechanical valve 34 is connected to the oil pump 33, the oil outlet of the main pressure regulating mechanical valve 34 is connected to the clutch lubricating oil circuit 51, and the feedback end of the main pressure regulating mechanical valve 34 is connected to the oil pump 33;
  • the oil outlet of the first switch solenoid valve 36 is connected to the control end of the first switching mechanical valve 38 and the control end of the main pressure regulating mechanical valve 34;
  • the controller controls the first switch solenoid valve 36 to achieve regulation of the oil supply pressure entering the first clutch pressure oil circuit 52, so as to achieve engagement or disconnection control of the single clutch.
  • the oil pump 33 works, and the working oil in the oil tank 31 passes through the first oil path 1 and the filter 32 and enters the inlet of the oil pump 33.
  • the working oil at the outlet of the oil pump 33 passes through the third oil path 1.
  • the fourth oil circuit 3, the fourth oil circuit 4, and the fifth oil circuit 5 enter the right feedback end of the main pressure regulating mechanical valve 34, and the working oil at the outlet of the oil pump 33 enters the inlet of the first switch solenoid valve 36 through the third oil circuit 3 and the fourth oil circuit 4.
  • the first switch solenoid valve 36 is not powered, and the first switch solenoid valve 36 is in the right end working position.
  • the tenth oil circuit 10 and the thirteenth oil circuit 13 are connected to the oil tank 31, and the pressure in the tenth oil circuit 10 and the thirteenth oil circuit 13 is 0 bar.
  • the spring of the first switching mechanical valve 38 makes the first switching mechanical valve 38 in the left end working position.
  • the sixteenth oil circuit 16 and the first clutch pressure oil circuit 52 are connected to the oil tank 31, and the pressure in the first clutch pressure oil circuit 52 is 0 bar, and the first clutch pressure oil circuit 52 is in a disconnected state.
  • the pressure at the right feedback end of the main pressure regulating mechanical valve 34 is balanced with the spring force of the main pressure regulating mechanical valve 34, the main pressure regulating mechanical valve 34 is in the right working position, the third oil circuit 3 is connected with the twelfth oil circuit 12, and the pressure of the working oil in the third oil circuit 3 and the fourth oil circuit 4, the fifth oil circuit 5, and the seventh oil circuit 7 is kept at a relatively low pressure value, with a typical design value of 2.5 bar.
  • the pressure in the first clutch pressure oil circuit 52 is 0 bar, the first clutch pressure oil circuit 52 is disconnected, and the oil pump 33 provides flow to the clutch lubricating oil circuit 51.
  • the pressure of the first clutch pressure oil circuit 52 is controlled when the hybrid transmission receives a request to enter parallel operation and requires the first clutch pressure oil circuit 52 to be engaged.
  • the first switch solenoid valve 36 is energized, and the first switch solenoid valve 36 is in the left end working position.
  • the tenth oil circuit 10, the thirteenth oil circuit 13 are connected with the fourth oil circuit 4, and the working oil at the outlet of the mechanical oil pump 33 enters the control end of the first switching mechanical valve 38 and the main pressure regulating mechanical valve 34 through the third oil circuit 3, the fourth oil circuit 4, the tenth oil circuit 10, and the thirteenth oil circuit 13.
  • the pressure in the thirteenth oil circuit 13 and the tenth oil circuit 10 is 2.5 bar, which is greater than the spring force of the first switching mechanical valve 38.
  • the first switching mechanical valve 38 is in the right end working position.
  • the seventh oil circuit 7 is connected with the sixteenth oil circuit 16 and the first clutch pressure oil circuit 52, and the working oil begins to enter the first clutch pressure oil circuit 52.
  • the first damping hole 21 is set in the seventh oil circuit 7 for controlling the oil filling flow of the first clutch pressure oil circuit 52.
  • the first accumulator 40 is set to communicate with the first clutch pressure oil circuit 52 through the eighteenth oil circuit 18 and the sixteenth oil circuit 16, so as to effectively reduce the pressure shock of the clutch.
  • the pressure at the left control end of the main pressure regulating mechanical valve 34 and the spring force of the main pressure regulating mechanical valve 34 are balanced with the pressure at the right feedback end.
  • the working position of the main pressure regulating mechanical valve 34 is in the right position, the third oil circuit 3 is connected with the twelfth oil circuit 12, and the pressure of the working oil in the third oil circuit 3 and the fourth oil circuit 4, the fifth oil circuit 5, and the seventh oil circuit 7 is adjusted to a high pressure value, such as a typical design value of 10 bar. After a certain period of time, the pressure in the first clutch pressure oil circuit 52 reaches the target 10 bar, and the first clutch pressure oil circuit 52 is combined.
  • the pressure of the working oil in the third oil circuit 3 and the fourth oil circuit 4, the fifth oil circuit 5, the seventh oil circuit 7 and the first clutch pressure oil circuit 52 is controlled by controlling the switch of the first switch solenoid valve 36.
  • the pressure in the first clutch pressure oil circuit 52 is 10 bar, and the first clutch pressure oil circuit 52 is in a combined state.
  • the oil pump 33 provides pressure to the first clutch pressure oil circuit 52 and provides flow to the clutch lubricating oil circuit 51 .
  • the controller when determining that the hybrid vehicle is in the series drive mode, the controller
  • the oil outlet of the control switch solenoid valve is connected to the oil tank, so that the main pressure regulating mechanical valve connects the oil pump and the clutch lubricating oil circuit, and the switching mechanical valve connects the clutch pressure oil circuit and the oil tank, so that the oil supply pressure entering the clutch pressure oil circuit is 0 bar, realizing the disconnection of the single clutch;
  • the controller controls the oil outlet of the switch solenoid valve and the oil pump to be connected, so that the main pressure regulating mechanical valve connects the oil pump and the clutch lubrication oil circuit, and the switching mechanical valve connects the clutch pressure oil circuit and the oil pump, so that the oil supply pressure entering the clutch pressure oil circuit is the preset high pressure (10 bar), thereby realizing the engagement of the single clutch.
  • the present application uses one switch solenoid valve to control the oil supply pressure of the clutch pressure oil circuit of one clutch, and uses two switch solenoid valves to control the oil supply pressure of the clutch pressure oil circuits of two clutches, which can meet the needs of single-speed and two-speed hybrid transmissions.
  • at least one solenoid valve is reduced, so that the hydraulic system structure is further simplified and the cost is further reduced.

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  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

公开了一种液压控制系统,包括:油箱(31)及与其连通的油泵(33);布置在混合动力汽车的发电机和驱动电机之间的单离合器,单离合器具有一条离合器润滑油路(51)和一条离合器压力油路;开关电磁阀,开关电磁阀的一个入油口连通至油箱(31),另一个入油口连通至油泵(33);切换机械阀,切换机械阀的一个入油口连通至油箱(31),另一个入油口连通至油泵(33),切换机械阀的出油口连通至离合器压力油路;主调压机械阀(34),主调压机械阀(34)的入油口连通至油泵(33),主调压机械阀(34)的出油口连通至离合器润滑油路(51),主调压机械阀(34)的反馈端连通至油泵(33);开关电磁阀的出油口和切换机械阀的控制端和主调压机械阀的控制端连通;使得结构进一步简化,成本进一步降低;还公开了使用该液压控制系统的控制方法及车辆。

Description

一种混合动力变速器的液压控制系统、控制方法及汽车 技术领域
本申请属于混动车用变速器技术领域,具体涉及一种混合动力变速器的液压控制系统、控制方法及汽车。
背景技术
随着国家法规对整车油耗的逐年加严,以及用户的用车成本,混合动力汽车油耗低,大众认可度越来越高。混合动力汽车的混动系统包括发电机和驱动电机、离合器、轴齿轮、液压系统等零部件,其中发电机与发动机连接,发动机消耗燃油可用于发电储存于动力电池。驱动电机连接差速器,差速器通过驱动轴连接车轮直接驱动车辆。发电机与驱动电机之间有离合器结构,可实现发电机与驱动电机连接,即发动机直接驱动车辆。
混合动力变速器主要工作模式:串联模式,当动力电池电量足够时,驱动电机消耗动力电池能源驱动车辆。当动力电池电量不足够时,发动机驱动发电机,将电量储存于动力电池,驱动电机消耗动力电池能源驱动车辆。此时由液压系统提供发电机、驱动电机、轴系润滑冷却流量;并联模式,离合器结合,发动机和发电机与驱动电机连接,此时发动机可直接驱动车辆,也可驱动电机和发动机一起驱动车辆。此时由液压系统提供发电机、驱动电机、轴系、离合器润滑冷却流量,同时需要离合器结合。
在现用技术中,专利文献(CN213920655U混合动力车辆及其液压系统、变速箱、动力系统/CN107054056B混合动力车辆)中液压系统采用两个开关电磁阀控制一个离合器。专利文献(CN213920655U混合动力车辆及其液压系统、变速箱、动力系统)中液压系统采用三个线性阀,控制一个离合器,控制一路润滑。以上现有技术电磁阀使用数量较多,成本较高。
发明内容
本申请的目的是提供一种低成本、结构简单的混合动力变速器的液压控制系统、控制方法及车辆。
本申请的技术方案为:
本申请提供了一种混合动力变速器的液压控制系统,包括:
控制器;
油箱及与其连通的油泵;
布置在混合动力汽车的发电机和驱动电机之间的单离合器,所述单离合器具有一条离合器润 滑油路和一条离合器压力油路;
开关电磁阀,其具有两个入油口和一个出油口,所述开关电磁阀的一个入油口连通至油箱,另一个入油口连通至油泵;
切换机械阀,其具有两个入油口和一个出油口,所述切换机械阀的一个入油口连通至油箱,另一个入油口连通至油泵,所述切换机械阀的出油口连通至所述离合器压力油路;
主调压机械阀,其具有一个入油口和一个出油口,所述主调压机械阀的入油口连通至油泵,所述主调压机械阀的出油口连通至所述离合器润滑油路,所述主调压机械阀的反馈端连通至油泵;
所述开关电磁阀的出油口与所述切换机械阀的控制端以及所述主调压机械阀的控制端连通;
所述控制器通过对所述开关电磁阀进行控制,实现对通入至离合器压力油路中的供油压力的调控,以实现单离合器的结合或断开控制。
可选地,所述液压控制系统还包括:
主压力切换机械阀,其具有两个入油口和一个出油口,所述主压力切换机械阀的一个入油口连通至油箱,另一个入油口连通至油泵;
所述主压力切换机械阀的出油口与所述主调压机械阀的控制端连通,所述主压力切换机械阀的控制端与所述开关电磁阀的出油口连通,以实现所述主调压机械阀的控制端至所述开关电磁阀的出油口之间间接连通。
可选地,所述液压控制系统还包括:
连通到所述切换机械阀和离合器压力油路之间的油路上的蓄能器。
可选地,在所述切换机械阀和油泵之间的油路上布置有阻尼孔。
本申请提供了一种混合动力变速器的液压控制系统,所述液压控制系统包括:
控制器;
油箱及与其连通的油泵;
布置在混合动力汽车的发电机和驱动电机之间的双离合器,所述双离合器具有一条离合器润滑油路和两条离合器压力油路;
两个开关电磁阀,各开关电磁阀均具有两个入油口和一个出油口;各开关电磁阀的一个入油口连通至油箱、另一个入油口连通至油泵;
两个切换机械阀,各切换机械阀均具有两个入油口和一个出油口,各所述切换机械阀的一个入油口连通至油箱、另一个入油口连通至油泵,各所述切换机械阀的出油口分别连通至一条所述离合器压力油路;
主调压机械阀,其具有一个入油口和一个出油口,所述主调压机械阀的入油口连通至油泵,所述主调压机械阀的出油口连通至所述离合器润滑油路,所述主调压机械阀的反馈端连通至油泵;
主压力切换机械阀,其具有两个入油口、一个出油口和两个控制端,所述主压力切换机械阀的一个入油口连通至油箱、另一个入油口连通至油泵,所述主压力切换机械阀的出油口与所述主调压机械阀的控制端连通;
各所述开关电磁阀的出油口分别与一个切换机械阀的控制端以及所述主压力切换机械阀的一个控制端连通;
所述控制器通过对各所述开关电磁阀进行控制,实现对通入至离合器压力油路中的供油压力的调控,以实现双离合器的结合或断开控制。
可选地,所述液压控制系统还包括:
连通到所述切换机械阀和离合器压力油路之间的油路上的蓄能器。
可选地,在所述切换机械阀和油泵之间的油路上布置有阻尼孔。
本申请还提供了一种混合动力变速器的液压控制系统的控制方法,应用于上述的混合动力变速器的液压控制系统,所述液压控制系统的控制方法包括:
在确定混合动力汽车处于串联驱动模式时,控制器控制开关电磁阀的出油口和油箱导通,使主调压机械阀将油泵和离合器润滑油路导通,使切换机械阀将离合器压力油路和油箱导通,使进入离合器压力油路中的供油压力为0bar,实现单离合器的断开;
在确定混合动力汽车处于并联驱动模式时,控制器控制开关电磁阀的出油口和油泵导通,使主调压机械阀将油泵和离合器润滑油路导通,使切换机械阀将离合器压力油路和油泵导通,使进入离合器压力油路中的供油压力为预设高压,实现单离合器的结合。
本申请还提供了一种混合动力变速器的液压控制系统的控制方法,应用于上述的混合动力变速器的液压控制系统,所述液压控制系统的控制方法包括:
在确定混合动力汽车处于串联驱动模式时,控制器控制两个开关电磁阀的出油口和油箱导通,使主调压机械阀将油泵和离合器润滑油路导通,使两个切换机械阀将对应的离合器压力油路和油箱导通,使进入各离合器压力油路中的供油压力为0bar,实现双离合器的断开;
在确定混合动力汽车处于并联驱动模式且确定双离合器中的其中一个目标离合器需要结合时,控制器控制目标离合器对应的开关电磁阀的出油口和油泵导通,使主调压机械阀将油泵和离合器润滑油路导通,使目标离合器对应的切换机械阀将离合器压力油路和油泵导通,使进入目标离合器对应的离合器压力油路中的供油压力为预设高压,实现目标离合器的结合; 同时,控制器还控制剩余离合器对应的开关电磁阀的出油口和油箱导通,使剩余离合器对应的切换机械阀将对应的离合器压力油路和油箱导通,使进入剩余离合器对应的离合器压力油路中的供油压力为0bar,实现剩余离合器的断开。
本申请还提供了一种车辆,包括上述的混合动力变速器的液压控制系统或上述的混合动力变速器的液压控制系统。
本申请的有益效果为:
本申请使用一个开关电磁阀控制一个离合器的离合器压力油路的供油压力,使用两个开关电磁阀控制两个离合器的离合器压力油路的供油压力,可以满足单档与两档混动变速器的需求。相对于传统的液压系统至少减少一个电磁阀的使用,使得液压系统结构进一步简化,成本进一步降低。
附图说明
图1为本实施例中两个开关电磁阀控制两个离合器的液压控制系统的结构图;
图2为本实施例中一个开关电磁阀控制一个离合器的液压控制系统的结构图;
图3为本实施例中进一步简化的一个开关电磁阀控制一个离合器的液压控制系统的结构图;图中:1-第一油路,2-第二油路,3-第三油路,4-第四油路,5-第五油路,6-第六油路,7-第七油路,8-第八油路,9-第九油路,10-第十油路,11-第十一油路,12-第十二油路,13-第十三油路,14-第十四油路,15-第十五油路,16-第十六油路,17-第十七油路,18-第十八油路,19-第十九油路。21-第一阻尼孔,22-第二阻尼孔,31-油箱,32-过滤器,33-油泵,34-主调压机械阀,35-主压力切换机械阀,351-主压力切换机械阀第一控制端,352-主压力切换机械阀第二控制端,36-第一开关电磁阀,37-第二开关电磁阀,38-第一切换机械阀,39-第二切换机械阀,40-第一蓄能器,41-第二蓄能器,51-离合器冷却润滑油路,52-第一离合器压力油路,53-第二离合器压力油路。
具体实施方式
下面结合附图对本申请作进一步说明。
如图1所示,本实施例提供了一种混合动力变速器的液压控制系统,该液压控制系统包括:
控制器;
油箱31及与其连通的油泵33;
布置在混合动力汽车的发电机和驱动电机之间的双离合器,所述双离合器具有一条离合器润滑油路51(对应图1中的冷却润滑)和两条离合器压力油路(对应第一离合器压力油路52 和第二离合器压力油路53,第一离合器压力油路52具体对应图1中的离合器1压力,第二离合器压力油路53具体对应离合器2压力);
两个开关电磁阀(对应第一开关电磁阀36和第二开关电磁阀37),各开关电磁阀均具有两个入油口和一个出油口;各开关电磁阀的一个入油口连通至油箱31、另一个入油口连通至油泵33;
两个切换机械阀(对应第一切换机械阀38和第二切换机械阀39),各切换机械阀均具有两个入油口和一个出油口,各所述切换机械阀的一个入油口连通至油箱31、另一个入油口连通至油泵33(从图1来看,第一切换机械阀38的一个入油口连通至油箱31、另一个入油口连通至油泵33,同理第二切换机械阀39的一个入油口连通至油箱31、另一个入油口连通至油泵33),各所述切换机械阀的出油口分别连通至一条所述离合器压力油路(具体来说,第一切换机械阀38的出油口和第一离合器压力油路52连通,第二切换机械阀39的出油口和第二离合器压力油路53连通);
主调压机械阀34,其具有一个入油口和一个出油口,所述主调压机械阀34的入油口连通至油泵33,所述主调压机械阀34的出油口连通至所述离合器润滑油路51,所述主调压机械阀34的反馈端连通至油泵33;
主压力切换机械阀35,其具有两个入油口、一个出油口和两个控制端,所述主压力切换机械阀35的一个入油口连通至油箱31、另一个入油口连通至油泵33,所述主压力切换机械阀35的出油口与所述主调压机械阀34的控制端连通;
各所述开关电磁阀的出油口分别与一个切换机械阀的控制端以及所述主压力切换机械阀35的一个控制端连通(即第一开关电磁阀36的出油口和第一切换机械阀38的控制端和主压力切换控制阀35的第一控制端351连通,第二开关电磁阀37的出油口和第二切换机械阀39和主压力切换控制阀35的第二控制端352连通);
所述控制器通过对各所述开关电磁阀进行控制,实现对通入至离合器压力油路中的供油压力的调控,以实现双离合器的结合或断开控制。其中,控制器对各开关电磁阀的具体控制原理为:
在确定混合动力汽车处于串联驱动模式时,控制器控制两个开关电磁阀的出油口和油箱31导通,使主调压机械阀将油泵33和离合器润滑油路51导通,使两个切换机械阀将对应的离合器压力油路和油箱31导通,使进入各离合器压力油路中的供油压力为0bar,实现双离合器的断开;
在确定混合动力汽车处于并联驱动模式且确定双离合器中的其中一个目标离合器需要结合 时,控制器控制目标离合器对应的开关电磁阀的出油口和油泵33导通,使主调压机械阀34将油泵33和离合器润滑油路51导通,使目标离合器对应的切换机械阀将离合器压力油路和油泵33导通,使进入目标离合器对应的离合器压力油路中的供油压力为预设高压,实现目标离合器的结合;同时,控制器还控制剩余离合器对应的开关电磁阀的出油口和油箱31导通,使剩余离合器对应的切换机械阀将对应的离合器压力油路和油箱31导通,使进入剩余离合器对应的离合器压力油路中的供油压力为0bar,实现剩余离合器的断开。
具体来说,如图1,本实施例中的液压控制系统包括第一油路1、第二油路2、第三油路3、第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9、第十油路10、第十一油路11、第十二油路12、第十三油路13、第十四油路14、第十五油路15、第十六油路16、第十七油路17、第十八油路18,第十九油路19、第一阻尼孔21,第二阻尼孔22、油箱31、过滤器32、油泵33、主调压机械阀34、主压力切换机械阀35、主压力切换机械阀第一控制端351、主压力切换机械阀第二控制端352、第一开关电磁阀36、第二开关电磁阀37、第一切换机械阀38、第二切换机械阀39、第一蓄能器40、第二蓄能器41、离合器冷却润滑油路51,第一离合器压力油路52,第二离合器压力油路53。
以上各零部件的连接关系如下:
如图1所示,过滤器32通过第一油路1与油箱31连通,油泵33的进油口通过第二油路2与过滤器32连通。主调压机械阀34的进油口通过第三油路3与油泵33的出口连通,第三油路3与第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9连通。主调压机械阀34的右边反馈端与第五油路5连通,主调压机械阀34的左边控制端通过第十三油路13与主压力切换机械阀35的出油口连通,主调压机械阀34的出油口与第十二油路12连通,第十二油路12与离合器润滑油路51连通。主压力切换机械阀35的进油口通过第六油路6与第四油路4连通,主压力切换机械阀35的第一控制端351通过第十四油路14与第十油路10连通,主压力切换机械阀35的第二控制端352通过第十五油路15与第十一油路11连通,主压力切换机械阀35的第一控制端351与主压力切换机械阀35的第二控制端352不相互连通。第一开关电磁阀36的进油口通过第八油路8与第四油路4连通,第一开关电磁阀36的出油口通过第十油路10与第一切换机械阀38的右边控制端连通。第一切换机械阀38的进油口通过第七油路7与第四油路4连通,第一阻尼孔21布置于第七油路7中,第一切换机械阀38的出油口与第十六油路16连通,第十六油路16通过第十八油路18与第一蓄能器40连通,第十六油路16与第一离合器压力油路52连通。第二开关电磁阀37的进油口与第四油路4连通,第二开关电磁阀37的出油口通过第十一油路11与第二切 换机械阀39的右边控制端连通。第二切换机械阀39的进油口通过第九油路9与第四油路4连通,第二阻尼孔22布置于第九油路9中,第二切换机械阀39的出油口与第十七油路17连通,第十七油路17通过第十九油路19与第二蓄能器41连通,第十七油路17与第二离合器压力油路53连通。
本实施例中,所述主调压机械阀34为两位两通机械阀,当主调压机械阀34处于左端工作位置时,第三油路3与第十二油路12断开,当主调压机械阀34处于右端工作位置时,第三油路3与第十二油路12连通。
本实施例中,所述主压力切换机械阀35为两位三通机械阀,当主压力切换机械阀35处于左端工作位置时,第十三油路13与油箱31连通,第十三油路13与第六油路6断开,当主压力切换机械阀35处于右端工作位置时,第十三油路13与油箱31断开,第十三油路13与第六油路6连通。
本实施例中,所述第一开关电磁阀36、第二开关电磁阀37均为两位三通的开关电磁阀,当第一开关电磁阀36不给电时,第一开关电磁阀36处于右端工作位置,此时第十油路10与油箱31连通,第十油路10与第八油路8、第四油路4断开,当第一开关电磁阀36给电时,第一开关电磁阀36处于左端工作位置,此时第十油路10与油箱31断开,第十油路10与第八油路8、第四油路4连通;当第二开关电磁阀37不给电时,第二开关电磁阀37处于右端工作位置,此时第十一油路11与油箱31连通,第十一油路11与第四油路4断开,当第二开关电磁阀37给电时,第二开关电磁阀37处于左端工作位置,此时第十一油路11与油箱31断开,第十一油路11与第四油路4连通;
本实施例中,第一切换机械阀38为两位三通机械阀,当第一切换机械阀38处于左端工作位置时,第十六油路16与油箱31连通,第十六油路16与第七油路7断开,当第一切换机械阀38处于右端工作位置时,第十六油路16与油箱31断开,第十六油路16与第七油路7连通。
本实施例中,第二切换机械阀39为两位三通机械阀,当第二切换机械阀39处于左端工作位置时,第十七油路17与油箱31连通,第十七油路17与第九油路9断开,当第二切换机械阀39处于右端工作位置时,第十七油路17与油箱31断开,第十七油路17与第九油路9连通。
本实施例中,油泵33由可由驱动电机驱动,也可由发动机或发电机驱动,也可采用独立电机驱动。
本实施例的工作过程如下:
如图1所示,为两个开关电磁阀控制两个离合器的混合动力液压控制系统的结构图。
当混合动力变速器在串联的模式下时,离合器断开,油泵33工作,油箱31中工作油经过第一油路1和过滤器32、进入油泵33的入口。油泵33出口的工作油通过第三油路3、第四油路4、第五油路5进入主调压机械阀34的右边反馈端,油泵33出口的工作油通过第三油路3、第四油路4、第八油路8进入第一开关电磁阀36、第二开关电磁阀37的入口,第一开关电磁阀36与第二开关电磁阀37不给电,第一开关电磁阀36与第二开关电磁阀37均处于右端工作位置,此时第十油路10、第十四油路14与油箱31连通,第十油路10、第十四油路14与第八油路8、第四油路4断开,控制油通过第一开关电磁阀36和第二开关电磁阀37回到油箱31,第十一油路11、第十五油路15与油箱31连通,第十一油路11、第十五油路15与第四油路4断开。此时第十油路10、第十四油路14、第十一油路11、第十五油路15中压力为0bar。第一切换机械阀38的弹簧作用下使第一切换机械阀38处于左端工作位置,此时十六油路16、第一离合器压力油路52与油箱31连通,第一离合器压力油路52中压力为0bar,第一离合器压力油路52处于断开;第二切换机械阀39的弹簧作用下使第二切换机械阀39处于左端工作位置,此时十七油路17、第二离合器压力油路53与油箱31连通,第二离合器压力油路53中压力为0bar,第二离合器压力油路53处于断开;主压力切换机械阀35的弹簧作用下使主压力切换机械阀35处于左端工作位置,此时十三油路13与油箱31连通,第十三油路13与第六油路6断开。此时第十三油路13中压力为0bar,主调压机械阀34右边反馈端压力与主调压机械阀34的弹簧力平衡,主调压机械阀34处于右位工作位置,第三油路3与第十二油路12连通,并且第三油路3与第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9中工作油中压力保持较低压力值,如典型设计值为2.5bar。在该状态下第一离合器压力油路52与第二离合器压力油路53中压力为0bar,第一离合器压力油路52与第二离合器压力油路53均处于断开,油泵33为离合器润滑油路51提供流量。
第一离合器压力油路52的压力控制,当混合动力变速器接收到进入并联的请求,需要第一离合器压力油路52结合时。第二开关电磁阀37不给电,第二开关电磁阀37处于右端工作位置,此时第十一油路11、第十五油路15与油箱31连通,第十一油路11中压力为0bar,第二切换机械阀39的弹簧作用下使第二切换机械阀39处于左端工作位置,此时十七油路17、第二离合器压力油路53与油箱31连通,第二离合器压力油路53中压力为0bar。第一开关电磁阀36给电,第一开关电磁阀36处于左端工作位置,此时第十油路10与油箱31断开,第十油路10、第十四油路14与第八油路8、第四油路4连通,机械油泵33出口 的工作油通过第三油路3、第四油路4、第八油路8、第十油路10、第十四油路14进入主压力切换机械阀第一控制端351与第一切换机械阀38的右边控制端,此时第十四油路14与第十油路10中的压力为2.5bar,大于主压力切换机械阀35与第一切换机械阀38的弹簧力,主压力切换机械阀35与第一切换机械阀38均处于右端工作位置,此时第十三油路13与第六油路6连通,第七油路7与第十六油路16连通。所以主调压机械阀34的左端控制端压力和主调压机械阀34的弹簧力与其右边反馈端的压力平衡,通过设置主调压机械阀34左边控制端作用面积小于主调压机械阀34右边反馈端作用面积,主调压机械阀34工作位置处于右位,第三油路3与第十二油路12连通,并且第三油路3与第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9中工作油中压力调整为高压力值,如典型设计值为10bar。同时第七油路7与第十六油路16连通,从而与第一离合器压力油路52连通,工作油开始进入第一离合器压力油路52,设置第一阻尼孔21于第七油路7中,用于控制第一离合器压力油路52的充油流量,设置第一蓄能器40通过第十八油路18和第十六油路16与第一离合器压力油路52连通,有效降低离合器的压力冲击,经过一定时间第一离合器压力油路52中压力达到目标10bar,第一离合器压力油路52结合。所以通过控制开关第一开关电磁阀36来控制第三油路3与第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9和第一离合器压力油路52中工作油的压力。在该状态下第一离合器压力油路52中压力为10bar,第一离合器压力油路52处于结合状态。油泵33为第一离合器压力油路52提供压力,为离合器润滑油路51提供流量。
第二离合器压力油路53的压力控制,当混合动力变速器接收到进入并联的请求,需要第二离合器压力油路53结合时。第一开关电磁阀36不给电,第一开关电磁阀36处于右端工作位置,此时第十油路10、第十四油路14与油箱31连通,第十油路10中压力为0bar,第一切换机械阀38的弹簧作用下使第一切换机械阀38处于左端工作位置,此时十六油路16、第一离合器压力油路52与油箱31连通,第一离合器压力油路52中压力为0bar。第二开关电磁阀37给电,第二开关电磁阀37处于左端工作位置,此时第十一油路11与油箱31断开,第十一油路11、第十五油路15与第四油路4连通,机械油泵33出口的工作油通过第三油路3、第四油路4、第十一油路11、第十五油路15进入主压力切换机械阀第二控制端352与第二切换机械阀39的控制端,此时第十五油路15与第十一油路11中的压力为2.5bar,大于主压力切换机械阀35与第二切换机械阀39的弹簧力,主压力切换机械阀35与第二切换机械阀39均处于右端工作位置,此时第十三油路13与第六油路6连通,第九油路9与第十七油路17连通。所以主调压机械阀34的左端控制端压力和主调压机械阀34的 弹簧力与其右边反馈端的压力平衡,通过设置主调压机械阀34左边控制端作用面积小于主调压机械阀34右边反馈端作用面积,主调压机械阀34工作位置处于右位,第三油路3与第十二油路12连通,并且第三油路3与第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9中工作油中压力调整为高压力值,如典型设计值为10bar。同时第九油路9与第十七油路17连通,从而与第二离合器压力油路53连通,工作油开始进入第二离合器压力油路53,设置第二阻尼孔22于第九油路9中,用于控制第二离合器压力油路53的充油流量,设置第二蓄能器41通过第十九油路19和第十七油路17与第二离合器压力油路53连通,有效降低离合器的压力冲击,经过一定时间第二离合器压力油路53中压力达到目标10bar,第二离合器压力油路53结合。所以通过控制开关第二开关电磁阀37来控制第三油路3与第四油路4、第五油路5、第六油路6、第七油路7、第八油路8、第九油路9和第二离合器压力油路53中工作油的压力。在该状态下第二离合器压力油路53中压力为10bar,第二离合器压力油路53处于结合状态。油泵33为第二离合器压力油路53提供压力,为离合器润滑油路51提供流量。
如图2所示,为一个开关电磁阀控制一个离合器的混合动力液压控制系统的结构图,由于系统控制离合器数量减少,相对于第一套结构(如图1),第二套结构(如图2)减少了第八油路8、第九油路9、第十一油路11、第十五油路15、第十七油路17、第十九油路19、第二阻尼孔22、第二开关电磁阀37、第二切换机械阀39、第二蓄能器41、第二离合器压力油路53、主压力切换机械阀第二控制端352,另外第一开关电磁阀36的进油口直接与第四油路4连通,其他零部件的连接关系与第一套结构(如图1)相同。
如图3所示,为进一步简化的一个开关电磁阀控制一个离合器的混合动力液压控制系统的结构图,相对于第二套结构(如图2),第三套结构(如图3)减少了主压力切换机械阀35、主压力切换机械阀第一控制端351和第六油路6、第十四油路14,另外第十三油路13与第十油路10连通,其他零部件的连接关系与第二套结构(如图2)相同。
图2为一个开关电磁阀控制一个离合器的混合动力液压控制系统的结构图。相对于第一套结构(如图1),第二套结构(如图2)中系统控制离合器数量减少为一个,系统只控制第一离合器压力油路52,第二套结构(如图2)的控制原理和过程与第一套结构(如图1)相同。此时,该液压控制系统包括:控制器;油箱31及与其连通的油泵33;布置在混合动力汽车的发电机和驱动电机之间的单离合器,所述单离合器具有一条离合器润滑油路51(对应图3中的冷却润滑)和一条第一离合器压力油路52(对应图3中的离合器1压力);第一开关电磁阀36,其具有两个入油口和一个出油口,所述第一开关电磁阀36的一 个入油口连通至油箱31,另一个入油口连通至油泵33;第一切换机械阀38,其具有两个入油口和一个出油口,第一所述切换机械阀38的一个入油口连通至油箱31,另一个入油口连通至油泵33,所述第一切换机械阀38的出油口连通至所述离合器压力油路;主调压机械阀34,其具有一个入油口和一个出油口,所述主调压机械阀34的入油口连通至油泵33,所述主调压机械阀34的出油口连通至所述离合器润滑油路51,所述主调压机械阀34的反馈端连通至油泵33;所述第一开关电磁阀36的出油口和所述第一切换机械阀38的控制端连通;主压力切换机械阀35,其具有两个入油口和一个出油口,所述主压力切换机械阀35的一个入油口连通至油箱31,另一个入油口连通至油泵33;所述主压力切换机械阀35的出油口与所述主调压机械阀34的控制端连通,所述主压力切换机械阀35的控制端与所述第一开关电磁阀36的出油口连通,以实现所述主调压机械阀34的控制端至所述第一开关电磁阀36的出油口之间间接连通;所述控制器通过对所述第一开关电磁阀36进行控制,实现对通入至第一离合器压力油路52中的供油压力的调控,以实现单离合器的结合或断开控制。
图3为进一步简化的一个开关电磁阀控制一个离合器的混合动力液压控制系统的结构图。相对于第二套结构(如图2),第三套结构(如图3)减少了主压力切换机械阀35、主压力切换机械阀第一控制端351和第六油路6、第十四油路14,另外第十三油路13与第十油路10连通。此时,该液压控制系统包括:控制器;油箱31及与其连通的油泵33;布置在混合动力汽车的发电机和驱动电机之间的单离合器,所述单离合器具有一条离合器润滑油路51(对应图3中的冷却润滑)和一条第一离合器压力油路52(对应图3中的离合器1压力);第一开关电磁阀36,其具有两个入油口和一个出油口,所述第一开关电磁阀36的一个入油口连通至油箱31,另一个入油口连通至油泵33;第一切换机械阀38,其具有两个入油口和一个出油口,第一所述切换机械阀38的一个入油口连通至油箱31,另一个入油口连通至油泵33,所述第一切换机械阀38的出油口连通至所述离合器压力油路;主调压机械阀34,其具有一个入油口和一个出油口,所述主调压机械阀34的入油口连通至油泵33,所述主调压机械阀34的出油口连通至所述离合器润滑油路51,所述主调压机械阀34的反馈端连通至油泵33;所述第一开关电磁阀36的出油口与所述第一切换机械阀38的控制端以及所述主调压机械阀34的控制端连通;所述控制器通过对所述第一开关电磁阀36进行控制,实现对通入至第一离合器压力油路52中的供油压力的调控,以实现单离合器的结合或断开控制。
当混合动力变速器在串联的模式下时,离合器不工作,油泵33工作,油箱31中工作油经过第一油路1和过滤器32、进入油泵33的入口。油泵33出口的工作油通过第三油 路3、第四油路4、第五油路5进入主调压机械阀34的右边反馈端,油泵33出口的工作油通过第三油路3、第四油路4进入第一开关电磁阀36的入口,第一开关电磁阀36不给电,第一开关电磁阀36处于右端工作位置,此时第十油路10、第十三油路13与油箱31连通,第十油路10、第十三油路13中压力为0bar。第一切换机械阀38的弹簧作用下使第一切换机械阀38处于左端工作位置,此时十六油路16、第一离合器压力油路52与油箱31连通,第一离合器压力油路52中压力为0bar,第一离合器压力油路52处于断开状态。主调压机械阀34右边反馈端压力与主调压机械阀34的弹簧力平衡,主调压机械阀34处于右位工作位置,第三油路3与第十二油路12连通,并且第三油路3与第四油路4、第五油路5、第七油路7中工作油中压力保持较低压力值,典型设计值为2.5bar。在该状态下第一离合器压力油路52中压力为0bar,第一离合器压力油路52处于断开,油泵33为离合器润滑油路51提供流量。
第一离合器压力油路52的压力控制,当混合动力变速器接收到进入并联的请求,需要第一离合器压力油路52结合时。第一开关电磁阀36给电,第一开关电磁阀36处于左端工作位置,此时第十油路10、第十三油路13与第四油路4连通,机械油泵33出口的工作油通过第三油路3、第四油路4、第十油路10、第十三油路13进入第一切换机械阀38与主调压机械阀34的控制端,此时第十三油路13与第十油路10中的压力为2.5bar,大于第一切换机械阀38的弹簧力,第一切换机械阀38均处于右端工作位置,此时第七油路7与第十六油路16连通、第一离合器压力油路52连通,工作油开始进入第一离合器压力油路52,设置第一阻尼孔21于第七油路7中,用于控制第一离合器压力油路52的充油流量,设置第一蓄能器40通过第十八油路18和第十六油路16与第一离合器压力油路52连通,有效降低离合器的压力冲击。同时主调压机械阀34的左端控制端压力和主调压机械阀34的弹簧力与其右边反馈端的压力平衡,通过设置主调压机械阀34左边控制端作用面积小于主调压机械阀34右边反馈端作用面积,主调压机械阀34工作位置处于右位,第三油路3与第十二油路12连通,并且第三油路3与第四油路4、第五油路5、第七油路7中工作油中压力调整为高压力值,如典型设计值为10bar。经过一定时间第一离合器压力油路52中压力达到目标10bar,第一离合器压力油路52结合。所以通过控制开关第一开关电磁阀36来控制第三油路3与第四油路4、第五油路5、第七油路7和第一离合器压力油路52中工作油的压力。在该状态下第一离合器压力油路52中压为10bar,第一离合器压力油路52处于结合状态。油泵33为第一离合器压力油路52提供压力,为离合器润滑油路51提供流量。
总结来说,针对于图3的系统,在确定混合动力汽车处于串联驱动模式时,控制器 控制开关电磁阀的出油口和油箱导通,使主调压机械阀将油泵和离合器润滑油路导通,使切换机械阀将离合器压力油路和油箱导通,使进入离合器压力油路中的供油压力为0bar,实现单离合器的断开;
在确定混合动力汽车处于并联驱动模式时,控制器控制开关电磁阀的出油口和油泵导通,使主调压机械阀将油泵和离合器润滑油路导通,使切换机械阀将离合器压力油路和油泵导通,使进入离合器压力油路中的供油压力为预设高压(10bar),实现单离合器的结合。
本申请使用一个开关电磁阀控制一个离合器的离合器压力油路的供油压力,使用两个开关电磁阀控制两个离合器的离合器压力油路的供油压力,可以满足单档与两档混动变速器的需求。相对于传统的液压系统至少减少一个电磁阀的使用,使得液压系统结构进一步简化,成本进一步降低。

Claims (10)

  1. 一种混合动力变速器的液压控制系统,其特征在于,包括:
    控制器;
    油箱及与其连通的油泵;
    布置在混合动力汽车的发电机和驱动电机之间的单离合器,所述单离合器具有一条离合器润滑油路和一条离合器压力油路;
    开关电磁阀,其具有两个入油口和一个出油口,所述开关电磁阀的一个入油口连通至油箱,另一个入油口连通至油泵;
    切换机械阀,其具有两个入油口和一个出油口,所述切换机械阀的一个入油口连通至油箱,另一个入油口连通至油泵,所述切换机械阀的出油口连通至所述离合器压力油路;
    主调压机械阀,其具有一个入油口和一个出油口,所述主调压机械阀的入油口连通至油泵,所述主调压机械阀的出油口连通至所述离合器润滑油路,所述主调压机械阀的反馈端连通至油泵;
    所述开关电磁阀的出油口与所述切换机械阀的控制端以及所述主调压机械阀的控制端连通;所述控制器通过对所述开关电磁阀进行控制,实现对通入至离合器压力油路中的供油压力的调控,以实现单离合器的结合或断开控制。
  2. 根据权利要求1所述的混合动力变速器的液压控制系统,其特征在于,所述液压控制系统还包括:
    主压力切换机械阀,其具有两个入油口和一个出油口,所述主压力切换机械阀的一个入油口连通至油箱,另一个入油口连通至油泵;
    所述主压力切换机械阀的出油口与所述主调压机械阀的控制端连通,所述主压力切换机械阀的控制端与所述开关电磁阀的出油口连通,以实现所述主调压机械阀的控制端至所述开关电磁阀的出油口之间间接连通。
  3. 根据权利要求1所述的混合动力变速器的液压控制系统,其特征在于,所述液压控制系统还包括:
    连通到所述切换机械阀和离合器压力油路之间的油路上的蓄能器。
  4. 根据权利要求1所述的混合动力变速器的液压控制系统,其特征在于,
    在所述切换机械阀和油泵之间的油路上布置有阻尼孔。
  5. 一种混合动力变速器的液压控制系统,其特征在于,所述液压控制系统包括:
    控制器;
    油箱及与其连通的油泵;
    布置在混合动力汽车的发电机和驱动电机之间的双离合器,所述双离合器具有一条离合器润滑油路和两条离合器压力油路;
    两个开关电磁阀,各开关电磁阀均具有两个入油口和一个出油口;各开关电磁阀的一个入油口连通至油箱、另一个入油口连通至油泵;
    两个切换机械阀,各切换机械阀均具有两个入油口和一个出油口,各所述切换机械阀的一个入油口连通至油箱、另一个入油口连通至油泵,各所述切换机械阀的出油口分别连通至一条所述离合器压力油路;
    主调压机械阀,其具有一个入油口和一个出油口,所述主调压机械阀的入油口连通至油泵,所述主调压机械阀的出油口连通至所述离合器润滑油路,所述主调压机械阀的反馈端连通至油泵;
    主压力切换机械阀,其具有两个入油口、一个出油口和两个控制端,所述主压力切换机械阀的一个入油口连通至油箱、另一个入油口连通至油泵,所述主压力切换机械阀的出油口与所述主调压机械阀的控制端连通;
    各所述开关电磁阀的出油口分别与一个切换机械阀的控制端以及所述主压力切换机械阀的一个控制端连通;
    所述控制器通过对各所述开关电磁阀进行控制,实现对通入至离合器压力油路中的供油压力的调控,以实现双离合器的结合或断开控制。
  6. 根据权利要求5所述的混合动力变速器的液压控制系统,其特征在于,所述液压控制系统还包括:
    连通到所述切换机械阀和离合器压力油路之间的油路上的蓄能器。
  7. 根据权利要求5所述的混合动力变速器的液压控制系统,其特征在于,
    在所述切换机械阀和油泵之间的油路上布置有阻尼孔。
  8. 一种混合动力变速器的液压控制系统的控制方法,应用于权利要求1至4中任一项所述的混合动力变速器的液压控制系统,其特征在于,所述液压控制系统的控制方法包括:
    在确定混合动力汽车处于串联驱动模式时,控制器控制开关电磁阀的出油口和油箱导通,使主调压机械阀将油泵和离合器润滑油路导通,使切换机械阀将离合器压力油路和油箱导通,使进入离合器压力油路中的供油压力为0bar,实现单离合器的断开;
    在确定混合动力汽车处于并联驱动模式时,控制器控制开关电磁阀的出油口和油泵导通,使主调压机械阀将油泵和离合器润滑油路导通,使切换机械阀将离合器压力油路和油泵导通,使进入离合器压力油路中的供油压力为预设高压,实现单离合器的结合。
  9. 一种混合动力变速器的液压控制系统的控制方法,应用于权利要求5至7中任一项所述的混合动力变速器的液压控制系统,其特征在于,所述液压控制系统的控制方法包括:
    在确定混合动力汽车处于串联驱动模式时,控制器控制两个开关电磁阀的出油口和油箱导通,使主调压机械阀将油泵和离合器润滑油路导通,使两个切换机械阀将对应的离合器压力油路和油箱导通,使进入各离合器压力油路中的供油压力为0bar,实现双离合器的断开;
    在确定混合动力汽车处于并联驱动模式且确定双离合器中的其中一个目标离合器需要结合时,控制器控制目标离合器对应的开关电磁阀的出油口和油泵导通,使主调压机械阀将油泵和离合器润滑油路导通,使目标离合器对应的切换机械阀将离合器压力油路和油泵导通,使进入目标离合器对应的离合器压力油路中的供油压力为预设高压,实现目标离合器的结合;
    同时,控制器还控制剩余离合器对应的开关电磁阀的出油口和油箱导通,使剩余离合器对应的切换机械阀将对应的离合器压力油路和油箱导通,使进入剩余离合器对应的离合器压力油路中的供油压力为0bar,实现剩余离合器的断开。
  10. 一种车辆,其特征在于,包括权利要求1至4中任一项所述的混合动力变速器的液压控制系统或权利要求5至7中任一项所述的混合动力变速器的液压控制系统。
PCT/CN2024/076138 2023-03-31 2024-02-05 一种混合动力变速器的液压控制系统、控制方法及汽车 Ceased WO2024198735A1 (zh)

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