WO2015124375A1 - Pompe entraînée par un mécanisme d'entraînement linéaire - Google Patents

Pompe entraînée par un mécanisme d'entraînement linéaire Download PDF

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Publication number
WO2015124375A1
WO2015124375A1 PCT/EP2015/051372 EP2015051372W WO2015124375A1 WO 2015124375 A1 WO2015124375 A1 WO 2015124375A1 EP 2015051372 W EP2015051372 W EP 2015051372W WO 2015124375 A1 WO2015124375 A1 WO 2015124375A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
pressure
cylinder
linear drive
fuel
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/EP2015/051372
Other languages
German (de)
English (en)
Inventor
Rudolf Haus
Werner Striegel
Robert Koch
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2015124375A1 publication Critical patent/WO2015124375A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/026—Means for reducing the pressure in common rails at power off
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/04—Draining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports

Definitions

  • the invention relates to a pump, comprising a pump cylinder head with a pump cylinder and a translationally in a recessed into the pump cylinder cylinder guide up and down pump plunger, the pump plunger on the drive side cooperates with a linear drive.
  • Such a pump is known from DE 10 2007 038 529 AI.
  • This pump is a high-pressure fuel pump with a pump working space in the
  • Fuel can be introduced and by a pump plunger with an upward movement of the pump plunger in a high-pressure outlet, which is connected to a high-pressure accumulator, can be promoted.
  • Pump plunger is drivingly connected in unspecified manner with a linear drive.
  • the linear drive the drive of the high-pressure fuel pump is decoupled from the rotational speed of the internal combustion engine to which the high-pressure fuel pump is installed.
  • the invention is based on the object to provide a pump which is improved in terms of their drive and their function.
  • connection of the linear drive with the pump tappet allows in a compact design exact movement control of the pump tappet.
  • the linear drive in particular a magnetic linear motor has the advantage of decoupling the drive of the pump from a machine on which the pump is installed. This can be done in all
  • the linear drive is controlled via a power electronics by a control unit.
  • the control unit if necessary, required measuring signals are supplied and according to the to be funded
  • Flow rate of the fluid through the pump is controlled by the power electronics, which in turn controls the linear drive.
  • the pump tappet is at rest of the pump or the entire system including the
  • Control unit and the power electronics in a zero position.
  • This approach of the zero position is assisted by a return spring which presses the linear drive and / or the pump plunger relative to the pump cylinder against a zero stop.
  • a return spring which presses the linear drive and / or the pump plunger relative to the pump cylinder against a zero stop.
  • the invention is in the pump cylinder with a the
  • Pump tappet made connection between the cylinder guide and the diversion channel ensures that a subsequent in the pump cylinder head to the cylinder guide pump working space is switched quasi pressure-free. It should be noted that with the pump, a fluid pressure of up to 3000 bar can be constructed, while the pressure in the low pressure system of the fluid is normally a few bar, for example less than 5 bar.
  • a high-pressure outlet of the pump is connected via a discharge line with the cylinder guide.
  • High-pressure accumulator is relieved. This function is useful, for example, for an emergency shutdown of the entire system, consisting of the pump and the machine on which the pump is installed.
  • a throttle is inserted into the discharge line. This ensures that the high pressure part of the system is not suddenly relaxed with a risk of damage to the components, but this relaxation is controlled by the throttle. As in the
  • the discharge line opens downstream of the check valve in the high-pressure outlet. This ensures that, bypassing the check valve, the pressure in the high-pressure outlet and the downstream system components is reduced.
  • the pump is a high-pressure fuel pump and the fluid fuel.
  • the object of the invention can be applied to any pump, the preferred application is in a high-pressure fuel pump.
  • the entire potential of the driven by the linear drive high-pressure fuel pump is achieved when the internal combustion engine has an electric hybrid powertrain.
  • Advantages of the system are: a lack of a complex drive mechanism and their sensitivity to the fluid used, for example fuel a flexible mounting situation on the machine, for example
  • a modulation of the high pressure flow rate by a frequency (F) - and stroke (h) - modulation a pressure build-up in the high-pressure accumulator can also take place at standstill of the engine, for example internal combustion engine, the optimum starting pressure being provided by the linear drive is taken at the start of the engine, such as internal combustion engine, an injection quantity, an immediate Nachbine the fluid, such as fuel is possible ( Start-stop and quick-start scenarios) it is a flexible lubricant for the connection between the linear drive and the pump tappet used it is a high-frequency control of the pressure in the high-pressure accumulator possible, since the individual delivery volume is very small it is a proportional behavior of given electronic control to the high-pressure delivery (pump characteristic, plausibility of the pressure signal of the high-pressure accumulator, a possible direct
  • Pressure detection via the current I of the linear drive is possible) a synchronization of the delivery behavior, in particular the delivery rate of the pump, for example, high-pressure fuel pump to the
  • Injection amount of an injector for example Kraftstoffinjektors, is possible there is a compensation possibility of the onset of pressure in the high-pressure accumulator during an injection with the extracted injection quantity by increasing the delivery rate elimination of mechanical protection components and faster
  • Control actuators are possible and the system is intrinsically safe when switching off due to the relaxation of the system via a diversion channel.
  • Figure 1 is an overview of the system, consisting of a
  • Control unit a power electronics, as a
  • High-pressure fuel pump connected high-pressure accumulator to which a number of fuel injectors are connected
  • FIG. 2 shows a schematic longitudinal section through the high-pressure fuel pump with a mechanical backlash-connected linear drive
  • Figure 3 is a diagram with one of a fuel injector injected
  • Figure 1 shows an overview of a system consisting of a control unit 1, a power electronics 2, a high-pressure fuel pump 3 with a linear actuator 4 and a high-pressure outlet 5, which is connected by a high-pressure line 8 to a high-pressure accumulator 6, to which by means of injection lines, a number of fuel injectors 7 are connected.
  • the illustrated system is part of a common rail injection system that is mounted to an internal combustion engine.
  • the common rail injection system further comprises a fuel low pressure system with at least one tank, a filter device and a low pressure pump, which is the
  • High-pressure fuel pump 3 fuel such as gasoline or
  • Diesel fuel feeds. From the high-pressure fuel pump 3, the fuel via the high-pressure outlet 5 and the high-pressure accumulator. 6
  • the control unit 1 which can also take on further control functions of the common rail injection system and / or the internal combustion engine, controls the power electronics 2, for example in response to a fuel pressure measured in the high-high pressure accumulator 6 by, for example, a pressure sensor 9, which in turn controls the linear drive 4 actuated.
  • the linear drive 4 which comprises a linear motor, acts mechanically backlash-free with a pump tappet 10 of the high-pressure fuel pump 3, which conveys the fuel into the high-pressure accumulator 6.
  • the control unit 1 via appropriate
  • Figure 2 shows a schematic longitudinal section through the
  • Linear drive 4 In addition to the illustrated embodiment can be attached to both sides of the linear drive 4, a high-pressure fuel pump 3 as needed.
  • the linear drive 4 has a conventional structure and is available in various designs and power levels.
  • Linear drive 4 has a cooling 11, which as water cooling or
  • Fuel cooling may be formed.
  • a heat exchanger 12 is integrated in the linear drive 4, which via corresponding connecting lines with a cooling circuit, which at the same time the cooling water circuit of
  • Linear actuator 4 the actuator or is connected mechanically free of play with the pump tappet 10.
  • the pump plunger 10 is in a cylinder guide 13, which is arranged in a pump cylinder having a pump cylinder head 14 of the high-pressure fuel pump 3, translationally movable up and down.
  • the cylinder guide 13 continues into a pump working chamber 15 arranged in the pump cylinder head 14, which is connected via a suction valve 16 to the mentioned low-pressure fuel system.
  • the pump working chamber 15 has the mentioned high-pressure outlet 5 in which a designed as a check valve high pressure valve 17 is inserted.
  • the high pressure valve 17 and also the suction valve 16 are preferably installed directly in corresponding recesses in the pump cylinder head 14.
  • Abgreskanal 18 and the Abêtnut 27 provides in a zero position 19 of the pump plunger 10 a then released from the pump plunger 10 connection to the cylinder guide 13 ago.
  • the diversion channel 18 is connected via a suitable connection to the low-pressure fuel circuit of the common-rail injection system.
  • a relief line 20 is inserted, which opens above the Abêtnut 27 in the cylinder guide 13 and which is further connected to the high-pressure outlet 5 downstream of the high-pressure valve 17.
  • the discharge line 20 also has a throttle 21.
  • the relief line 20 and the throttle 21 are preferably integrated in the pump cylinder head 14.
  • the pump plunger 10 In the resting state of the system, the pump plunger 10 is held by a return spring 22 in a lifting height h, which corresponds to the zero position 19. About this mechanical zero position 19, the electronic control of the system is calibrated.
  • the control unit 1 or the power electronics 2 is known, for example via corresponding sensor data at any time, the current lifting height h. In the zero position 9 is of the
  • Relief line 20 closes the in the cylinder guide 1 and the
  • Pump workspace 15 formed cylinder volume.
  • a further deflection of the pump plunger 10 in the direction of the pump working chamber 15 causes a compression of the fuel and the suction valve 16 is pressed into its seat and closes.
  • a further displacement of the pump plunger 10 finally causes a pushing out of the located in the pump chamber 15 fuel in the high-pressure outlet 5 via the inlet high-pressure valve 17.
  • High pressure valve 17 can flow back no fuel, a negative pressure builds up in the pump working chamber 15, which causes opening of the suction valve 16. Thus, fuel flows from the low-pressure fuel system in the
  • the linear drive 4 In a deliberate shutdown of the system or in an emergency shutdown, which may be caused for example by a power failure, the linear drive 4 generates no force Fk more.
  • In the upper part diagram is the
  • Injection amount 24 is shown over the time axis of a
  • Fuel injector 7 is injected during a period of time in a combustion chamber and is thus removed from the high-pressure accumulator 6.
  • the sub-diagram shown below shows the pressure curve in the high-pressure accumulator 6, which caused by the withdrawn injection amount 24 almost simultaneously a collapse 25 learns. This break-in 25 is according to the lower
  • Partial diagram compensated by the adjustable by the linear actuator 4 and raised delivery rate 26 of the high-pressure fuel pump 3.
  • a linear drive 4 has a maximum stroke h of 8 mm with a producible force Fi_Mmax of 540 N, while the prevailing in the high-pressure accumulator 6 maximum pressure p should be 2,000 bar. This results in the following relationship or design for the plunger surface A of the pump plunger 10:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une pompe, notamment une pompe d'alimentation haute pression (1) d'un système d'injection à rampe commune, présentant une culasse de cylindre de pompe (14) pourvue d'un cylindre de pompe, et un poussoir de pompe (10) animé d'un mouvement de va-et-vient translationnel dans un guide de cylindre (13) encastré dans un cylindre de pompe, le poussoir de pompe (10) coopérant côté entraînement avec un mécanisme d'entraînement linéaire (4). Le mécanisme d'entraînement linéaire (4) est relié au poussoir de pompe (10) sans jeu mécanique. Un canal de refoulement (18), encastré dans le cylindre de pompe, est relié à une rainure de refoulement (27) entourant le guide de cylindre (13), la rainure de refoulement (27) présentant dans une position zéro du poussoir de pompe (10) une liaison avec le guide de cylindre (13), ladite liaison étant , libérée par le poussoir de pompe. Une sortie haute pression (5) de la pompe est reliée au guide de cylindre par une conduite de décharge (20). La partie haute pression du système d'injection à rampe commune est ainsi apte à se détendre sans problème.
PCT/EP2015/051372 2014-02-18 2015-01-23 Pompe entraînée par un mécanisme d'entraînement linéaire Ceased WO2015124375A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014202937.6 2014-02-18
DE102014202937.6A DE102014202937A1 (de) 2014-02-18 2014-02-18 Pumpe, die von einem Linearantrieb angetrieben ist

Publications (1)

Publication Number Publication Date
WO2015124375A1 true WO2015124375A1 (fr) 2015-08-27

Family

ID=52462292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/051372 Ceased WO2015124375A1 (fr) 2014-02-18 2015-01-23 Pompe entraînée par un mécanisme d'entraînement linéaire

Country Status (2)

Country Link
DE (1) DE102014202937A1 (fr)
WO (1) WO2015124375A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113530782A (zh) * 2021-07-15 2021-10-22 中铁工程装备集团有限公司 一种具有快速压力切断保护功能的大排量泵及其保护方法
US20230383734A1 (en) * 2007-09-06 2023-11-30 Deka Products Limited Partnership Product Dispensing System

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3428441A1 (fr) 2017-07-11 2019-01-16 Siemens Aktiengesellschaft Entraînement d'une pompe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004040135A1 (fr) * 2002-11-01 2004-05-13 Danfoss A/S Pompe a liquide alternative servant a alimenter un bruleur domestique en combustible liquide
DE102007038529A1 (de) * 2007-08-16 2009-02-19 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
EP2128443A1 (fr) * 2008-05-27 2009-12-02 Lincoln GmbH Elément de pompe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004040135A1 (fr) * 2002-11-01 2004-05-13 Danfoss A/S Pompe a liquide alternative servant a alimenter un bruleur domestique en combustible liquide
DE102007038529A1 (de) * 2007-08-16 2009-02-19 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
EP2128443A1 (fr) * 2008-05-27 2009-12-02 Lincoln GmbH Elément de pompe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230383734A1 (en) * 2007-09-06 2023-11-30 Deka Products Limited Partnership Product Dispensing System
US12135019B2 (en) 2007-09-06 2024-11-05 Deka Products Limited Partnership Product dispensing system
CN113530782A (zh) * 2021-07-15 2021-10-22 中铁工程装备集团有限公司 一种具有快速压力切断保护功能的大排量泵及其保护方法
CN113530782B (zh) * 2021-07-15 2022-07-08 中铁工程装备集团有限公司 一种具有快速压力切断保护功能的大排量泵及其保护方法

Also Published As

Publication number Publication date
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