JP2013210077A - Clutch control device in power unit for vehicle - Google Patents

Abstract

In a vehicular power unit in which a clutch is interposed between an engine and a transmission so as to be in a power transmission state when a hydraulic cylinder is operated, the clutch is maintained in a connected state by the hydraulic cylinder, and the engine Reduces drive loss and contributes to reduced fuel consumption of the engine.
Solenoid valves 40A and 40B are interposed in connecting oil passages 39A and 39B connecting an oil pump 36 driven by an electric motor 37 and hydraulic cylinders 35A and 35B. , 40B, the control unit C controls the operation of the electric motor 37 while holding the hydraulic cylinders 35A, 35B by closing the electromagnetic on-off valves 40A, 40B while the clutches 15A, 15B are connected. .
[Selection] Figure 4

Description

  The present invention is interposed between the engine and the transmission so as to be in a power transmission state when the hydraulic cylinder is operated, an engine, a transmission that shifts power from the engine and transmits the power to driving wheels. The present invention relates to a clutch control device in a vehicle power unit including a clutch.

  In such a vehicle power unit, as disclosed in Patent Document 1, it is common to supply hydraulic oil from an oil pump driven by an engine to a hydraulic cylinder that operates a clutch.

JP 2010-261508 A

  By the way, when the clutch interposed in the power transmission system of the vehicle is maintained in the connected state by the hydraulic cylinder operated by the action of hydraulic pressure, the clutch is used when the oil pump is driven by the engine. In this connected state, the operation of the oil pump must be continued, and an engine drive loss is generated accordingly, which may increase fuel consumption.

  SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a vehicle capable of contributing to a reduction in engine fuel consumption by reducing engine drive loss while maintaining a clutch in a connected state with a hydraulic cylinder. An object of the present invention is to provide a clutch control device in a power unit for a vehicle.

  In order to achieve the above object, the present invention provides an engine, a transmission that shifts power from the engine and transmits the power to drive wheels, a power transmission state when the hydraulic cylinder is operated, and the engine and the In a vehicular power unit including a clutch interposed between transmissions, an oil pump driven by an electric motor, a connection oil passage connecting the oil pump and the hydraulic cylinder, and the connection oil passage An electromagnetic on-off valve, and a control unit for controlling the operation of the electric motor and the electromagnetic on-off valve, and the control unit closes the electromagnetic on-off valve during connection of the clutch to control the hydraulic pressure of the hydraulic cylinder. The first feature is that the operation of the electric motor is stopped while holding the motor.

  According to the present invention, in addition to the configuration of the first feature, a first release oil path branched from the solenoid on-off valve and the hydraulic cylinder of the connection oil path and connected to the suction side of the oil pump; And a first regulator valve interposed in the first release oil passage is a second feature.

  In addition to the configuration of the second feature of the present invention, a second release oil passage that branches from between the oil pump and the electromagnetic on-off valve of the connection oil passage and is connected to the suction side of the oil pump; And a second regulator valve that is interposed in the second release oil passage and controlled by the control unit, and the control unit opens the second regulator valve when the electromagnetic on-off valve is closed. This is a third feature.

  In addition to the configuration of the third feature, the present invention provides a first hydraulic pressure detector that detects a hydraulic pressure between the electromagnetic on-off valve and the hydraulic cylinder of the connection oil passage, the oil pump of the connection oil passage, A second hydraulic pressure detector for detecting the hydraulic pressure between the electromagnetic on-off valves, and the electric motor, the electromagnetic on-off valve, the first regulator valve, and the second in accordance with detection values of the first and second hydraulic pressure detectors. The control unit that controls the operation of the regulator valve is configured to close the electromagnetic on-off valve and stop the operation of the electric motor when the detection value of the first hydraulic pressure detector is lower than a first predetermined value. After reactivating the electric motor and controlling the second regulator valve so that the detection value of the second hydraulic pressure detector reaches a second predetermined value higher than the first predetermined value, the electromagnetic on-off valve is opened. The first When the detected value of the first oil pressure detector reaches the maximum value of the clutch holding pressure that is higher than the first predetermined value and lower than the second predetermined value by controlling the operation of the regulator valve. A fourth feature is that the electromagnetic on-off valve is closed and the operation of the electric motor is stopped.

  In addition to the configuration of the fourth feature, the fifth feature of the present invention is that the control unit controls the first regulator valve to be opened when the clutch is disengaged.

  In addition to the configuration of the third feature, the present invention is common to a pair of hydraulic cylinders individually connected to the clutch corresponding to the pair of clutches interposed between the engine and the transmission. The oil pump, the second release oil passage, the second regulator valve, the connection oil passage, the electromagnetic on-off valve, the first release oil passage, and the first regulator valve individually corresponding to each hydraulic cylinder, It is a sixth feature to have

  Furthermore, the present invention, in addition to the configuration of the sixth feature, the transmission includes a gear train of an odd speed stage that can be selectively established and a gear train of an even speed stage that can be selectively established. The pair of clutches should be able to shift up and down by switching the power transmission by the gear train of the odd-numbered gear stage and switching the power transmission by the gear train of the even-numbered gear stage by switching the connection / disconnection alternately. The control unit is connected to the transmission, and the control unit is configured to connect both connected oils at the time of a shift change in which one of a pair of clutches is connected and the other is disconnected and the other is disconnected and the other is connected. The hydraulic pressure of one connection oil path of the paths is released by opening the first regulator valve while the electromagnetic on-off valve of the connection oil path is closed, and the oil pump is driven by the electric motor. In this state, the electromagnetic on-off valve of the other connecting oil passage is opened, and after reaching a predetermined hydraulic pressure, the electromagnetic on-off valve is closed and the operation of the electric motor is stopped so as to maintain the hydraulic pressure, The seventh feature is that the operation of the electric motor is stopped except in a state where the oil pressure in both the connecting oil passages has decreased below the required oil pressure and during a shift change.

  According to the first feature of the present invention, hydraulic oil discharged from an oil pump driven by an electric motor is supplied to a hydraulic cylinder so as to reduce engine drive loss and contribute to reduction in fuel consumption. it can. In addition, since the electromagnetic on-off valve is closed and the hydraulic pressure is held in the hydraulic cylinder while the clutch is engaged, the operation of the electric motor can be stopped to reduce power consumption.

  According to the second feature of the present invention, the hydraulic pressure acting on the hydraulic cylinder can be regulated by the first regulator valve with the electromagnetic on-off valve closed, and the hydraulic pressure of the hydraulic cylinder can be adjusted with a simple structure. It becomes possible.

  According to the third feature of the present invention, the hydraulic pressure of the connecting oil passage can be adjusted by the second regulator valve, and the second regulator valve is opened when the electromagnetic on-off valve is closed, so that the oil The connection oil path between the pump and the electromagnetic on-off valve can be prevented from being unnecessarily high in pressure, which can contribute to improved durability.

  According to the fourth aspect of the present invention, after the electromagnetic on-off valve is closed and the operation of the electric motor is stopped, the hydraulic pressure between the electromagnetic on-off valve and the hydraulic cylinder is decreased below the first predetermined value. The electromagnetic on-off valve and the hydraulic cylinder are opened with the electromagnetic on-off valve opened after the electric motor is restarted and the hydraulic pressure between the electromagnetic on-off valve and the oil pump reaches a second predetermined value higher than the first predetermined value. When the hydraulic pressure between them reaches a maximum value of the clutch holding pressure that is higher than the first predetermined value and lower than the second predetermined value, the electromagnetic on-off valve is closed and the operation of the electric motor is stopped. The hydraulic pressure acting on the hydraulic cylinder can be sufficiently maintained while suppressing the power consumption by minimizing the operation of the electric motor.

  According to the fifth feature of the present invention, since the first regulator valve is opened in the clutch disengaged state, the clutch can be quickly switched from the engaged state to the disengaged state, and the hydraulic oil is returned to the next clutch engaged. Can be prepared for operation.

  According to the sixth aspect of the present invention, it is possible to switch between the connection and disconnection of the pair of clutches while reducing fuel consumption and reducing power consumption by reducing engine drive loss.

  Further, according to a seventh aspect of the present invention, the transmission is connected to the transmission to enable shift transmission and shift-down by switching power transmission by an odd-numbered gear train and power transmission by an even-numbered gear train. Power consumption can be reduced by controlling the pair of clutches while suppressing the operation of the electric motor as much as possible.

It is a figure which shows the structure of the power unit for vehicles. It is a hydraulic circuit diagram which shows the structure of a clutch control apparatus. FIG. 3 is a hydraulic circuit diagram corresponding to FIG. 2 when the vehicle starts. FIG. 3 is a hydraulic circuit diagram corresponding to FIG. 2 with one clutch engaged. FIG. 3 is a hydraulic circuit diagram corresponding to FIG. 2 at the start of a shift.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, in FIG. 1, for example, a power unit P mounted on a motorcycle shifts an engine E and power from the engine E. A transmission M configured to transmit to a rear wheel, which is a drive wheel, and a pair of first and second clutches 15A and 15B interposed between the engine E and the transmission M are provided.

  The engine E includes a crankshaft 12 to which a plurality of pistons 11, 11... Are connected in common, and the rotational power of the crankshaft 12 is first and second via a primary speed reducer 13 and a damper rubber 14. Are input to the clutches 15A and 15B.

  The transmission M is selectively between a first and second main shafts 18 and 19 having an axis parallel to the crankshaft 12 and a countershaft 30 having an axis parallel to the main shafts 18 and 19. A plurality of gear trains that can be established, for example, first to fourth gear trains G1 to G4, and a chain for transmitting power to the rear wheels at the end of the countershaft 30. The drive sprocket 31 is fixed so that is wound around.

  The first and second main shafts 18 and 19 are arranged coaxially so as to be capable of relative rotation. Between the first main shaft 18 and the counter shaft 30, first and third odd-numbered gear trains are arranged. Gear stages G1 and G3 are provided, and between the second main shaft 19 and the countershaft 30, second and fourth gear stages G2 and G4, which are even-speed gear trains, are provided.

  The first gear stage gear train G1 is supported by the first speed drive gear 20 integrally provided on the first main shaft 18 and the counter shaft 30 so as to be relatively rotatable, and meshes with the first speed drive gear 20. The third speed gear train G3 is supported by the third speed drive gear 22 fixed to the first main shaft 18 and the counter shaft 30 so as to be relatively rotatable. And a third-speed driven gear 23 that meshes with the third-speed drive gear 22. A second shifter 24 is splined to the countershaft 30 between the first and third speed driven gears 21 and 23, and the first and third speed driven gears are moved by the axial movement of the second shifter 24. A state in which 21 and 23 are freely rotated with respect to the countershaft 30 (neutral state) and one of the first and third speed driven gears 21 and 23 are coupled to the countershaft 30 so as not to be relatively rotatable. It is possible to switch between a state in which one of the gear stage gear train G1 and the third gear train G3 is established.

  The second gear stage gear train G2 is rotatably supported by the second speed drive gear 25 integrally provided on the second main shaft 19 and the counter shaft 30, and meshes with the second speed drive gear 25. The fourth speed gear train G4 is supported by the fourth speed drive gear 27 fixed to the second main shaft 19 and the counter shaft 30 so as to be relatively rotatable. And a fourth speed driven gear 28 that meshes with the fourth speed drive gear 27. Further, a first shifter 29 is splined to the countershaft 30 between the second and fourth speed driven gears 26 and 28, and the second and fourth speed driven gears are moved by the axial movement of the second shifter 29. A state in which the gears 26 and 28 are freely rotated with respect to the countershaft 30 (neutral state) and one of the second and fourth speed driven gears 26 and 28 are coupled to the countershaft 30 so as not to be relatively rotatable. It is possible to switch between a state in which one of the second gear stage gear train G2 and the fourth gear stage gear train G4 is established.

  The first clutch 15A is capable of switching between transmission to the first main shaft 18 and transmission interruption of power transmitted from the crankshaft 12 through the primary speed reducer 13 and the damper rubber 14... And the second clutch. 15B is capable of switching between transmission to the second main shaft 19 of transmission of power transmitted from the crankshaft 12 via the primary speed reducer 13 and the damper rubbers 14 and transmission interruption.

  In FIG. 2, the first and second clutches 15A and 15B are in a connected state when the first and second hydraulic cylinders 35A and 35B are operated in accordance with the action of the hydraulic pressure. The second hydraulic cylinders 35A and 35B can be supplied with hydraulic oil discharged from an oil pump 36 driven by an electric motor 37 so as to pump up hydraulic oil from a reservoir 38. The first and second hydraulic cylinders 35A and 35B are connected by connecting oil passages 39A and 39B.

  Electromagnetic on-off valves 40A and 40B are interposed in the connection oil passages 39A and 39B. Further, in the connection oil passages 39A and 39B, the first release oil passages 45A and 45B branched from the electromagnetic on-off valves 40A and 40B and the first and second hydraulic cylinders 35A and 35B are provided in the oil pump 36. The first release oil passages 45A and 45B are provided with first regulator valves 41A and 41B, respectively.

  Further, a second release oil passage 46 branched from the oil pump 36 and the electromagnetic on-off valves 40A and 40B of the connection oil passages 39A and 39B is connected to the suction side of the oil pump 36, and a second release oil passage 36 is connected. A second regulator valve 42 is interposed in the oil passage 46.

  The operations of the electric motor 37, the electromagnetic on-off valves 40A and 40B, the first regulator valves 41A and 41B, and the second regulator valve 42 are controlled by a control unit C. Detection values of the first hydraulic pressure detectors 43A and 43B for detecting the hydraulic pressure between the electromagnetic on-off valves 40A and 40B and the first and second hydraulic cylinders 35A and 35B in the connection oil passages 39A and 39B, and the connection oil The detection value of the second oil pressure detector 44 that detects the oil pressure between the oil pump 36 and the electromagnetic on-off valves 40A and 40B in the paths 39A and 39B is input.

  Next, the operation of the clutch control device will be described with reference to FIGS. 3 to 5, but the oil path on which the high pressure oil pressure is acting is indicated by a thick line.

  The electromagnetic open / close valves 40A and 40B are normally closed electromagnetic open / close valves, and the first and second clutches 15A and 15B are connected by applying hydraulic pressure to the first and second hydraulic cylinders 35A and 35B. Is controlled by the control unit C so that the valve is opened.

  For example, when the first clutch 15A is brought into a connected state at the start of the motorcycle, the hydraulic oil discharged from the oil pump 36 driven by the electric motor 37 is received by the second regulator valve 42 as shown in FIG. While the pressure is adjusted, the first on-off valve 40A is supplied to the first hydraulic cylinder 35A in response to the opening, and the first hydraulic cylinder 35A is actuated to bring the first clutch 15A into a connected state.

  The electromagnetic on-off valves 40A and 40B are controlled by the control unit C so as to be closed while the corresponding clutch of the first and second clutches 15A and 15B is connected. At that time, the second regulator valve 42 is controlled. Is controlled by the control unit C so as to open, and the operation of the electric motor 37 is also stopped by the control unit C. For example, while the first clutch 15A is engaged, the electromagnetic on-off valve 40A is closed as shown in FIG. 4, the second regulator valve 42 is opened, and the electric motor 37 is stopped.

  During the engagement of the first clutch 15A, the control unit C restarts the electric motor 37 when the detection value of the first hydraulic pressure detector 43A falls below the first predetermined value and After the second regulator valve 42 is controlled so that the detection value of the second hydraulic pressure detector 44 reaches a second predetermined value higher than the first predetermined value, the electromagnetic on-off valve 40A is opened in the state that the valve is opened. By controlling the operation of the first regulator valve 41A, the detected value of the first hydraulic pressure detector 43A reaches the maximum value of the clutch holding pressure that is higher than the first predetermined value and lower than the second predetermined value. Then, the electromagnetic on-off valve 40A is closed and the operation of the electric motor 37 is stopped. This is the same during the connection of the second clutch 15B, and the control unit C determines that the electric motor 37, the electromagnetic opening and closing are based on the detection values of the first oil pressure detector 43B and the second oil pressure detector 44. The operation of the valve 40B, the first regulator valve 41A, and the second regulator valve 42 is controlled.

  Further, the control unit C is configured to connect both connected oil passages 39A at the time of a shift change in which one of the pair of clutches 15A and 15B is connected and the other is disconnected and the other is connected. 39B, the hydraulic pressure of one of the connecting oil passages is released by opening the first regulator valve while the electromagnetic on-off valve of the connecting oil passage is closed, and the oil pump is driven by the electric motor. The electromagnetic on / off valve of the other connecting oil passage is opened to reach a predetermined hydraulic pressure, and then the electromagnetic on / off valve is closed so as to maintain the hydraulic pressure. For example, the first clutch 15A is shut off. At the time of shifting with the second clutch 15B connected, as shown in FIG. 5, the control unit C keeps the electromagnetic on-off valve 40B on the first clutch 15A side closed. The regulator valve 41A is opened to release the hydraulic pressure of the connecting oil passage 39A, and the electromagnetic on / off valve 40B of the connecting oil passage 39B is opened to a predetermined hydraulic pressure while the oil pump 36 is driven by the electric motor 37. Then, the electromagnetic on-off valve 40B is closed so as to maintain the hydraulic pressure, and the operation of the electric motor 37 is also stopped.

  In this way, the control unit C stops the operation of the electric motor 37 except when the hydraulic pressure of both the connecting oil passages 39A and 39B is lowered below the required hydraulic pressure and during a shift change.

  Next, the operation of this embodiment will be described. The oil pump 36 driven by the electric motor 37 and the first and second hydraulic cylinders 35A and 35B for driving the first and second clutches 15A and 15B. The connecting oil passages 39A and 39B are connected to each other, so that hydraulic oil discharged from the oil pump 36 driven by the electric motor 37 is supplied to the first and second hydraulic cylinders 35A and 35B. Driving loss can be reduced and fuel consumption can be reduced.

  The connection oil passages 39A and 39B are provided with electromagnetic on-off valves 40A and 40B, and the control unit C for controlling the operation of the electric motor 37 and the electromagnetic on-off valves 40A and 40B is provided with the first and second clutches 15A and 15B. During the connection of 15B, the electromagnetic on-off valves 40A and 40B are closed to hold the hydraulic pressures of the first and second hydraulic cylinders 35A and 35B and the operation of the electric motor 37 is stopped. it can.

  Further, a first release oil passage branched from the electromagnetic on-off valves 40A and 40B of the connection oil passages 39A and 39B and the first and second hydraulic cylinders 35A and 35B and connected to the suction side of the oil pump 36. Since the first regulator valves 41A and 41B are interposed in 45A and 45B, the hydraulic pressure acting on the first and second hydraulic cylinders 35A and 35B with the electromagnetic on-off valves 40A and 40B closed is the first. The regulator valves 41A and 41B can adjust the pressure, and the hydraulic pressure of the first and second hydraulic cylinders 35A and 35B can be adjusted with a simple structure.

  A second regulator valve 42 is provided in a second release oil passage 46 that branches from the oil pump 36 and the solenoid on-off valves 40A and 40B in the connection oil passages 39A and 39B and is connected to the suction side of the oil pump 36. Then, the control unit C that controls the second regulator valve 42 opens the second regulator valve 42 when the electromagnetic on-off valves 40A and 40B are closed, and therefore, between the oil pump 36 and the electromagnetic on-off valves 40A and 40B. The connection oil passages 39A and 39B can be prevented from becoming unnecessarily high in pressure, thereby contributing to improvement in durability.

  Further, the hydraulic pressure between the electromagnetic on-off valves 40A and 40B of the connection oil passages 39A and 39B and the first and second hydraulic cylinders 35A and 35B is detected by the first oil pressure detectors 43A and 43B, and the connection oil passages 39A and 39B. The oil pressure between the oil pump 36 and the electromagnetic on-off valves 40A and 40B is detected by the second oil pressure detector 44, and the detection values of the first oil pressure detectors 43A and 43B and the detection value of the second oil pressure detector 44 are input. When the detected value of the first hydraulic pressure detectors 43A and 43B is lower than the first predetermined value after the control unit C to be closed closes the electromagnetic on-off valves 40A and 40B and stops the operation of the electric motor 37, the control unit C is electrically operated. After controlling the second regulator valve 42 so that the motor 37 is restarted and the detection value of the second oil pressure detector 44 reaches a second predetermined value higher than the first predetermined value, By controlling the operation of the first regulator valves 41A and 41B with the magnetic on-off valves 40A and 40B opened, the detection values of the first hydraulic pressure detectors 43A and 43B are higher than the first predetermined value and are second. When the maximum value of the clutch holding pressure that is lower than the predetermined value is reached, the electromagnetic on-off valves 40A and 40B are closed and the operation of the electric motor 37 is stopped. Therefore, the operation of the electric motor 37 is minimized. As described above, the hydraulic pressure acting on the first and second hydraulic cylinders 35A and 35B can be sufficiently maintained while suppressing power consumption.

  Further, since the control unit C controls the first regulator valves 41A and 41B to be opened when the first and second clutches 15A and 15B are disconnected, the first and second clutches 15A and 15B are connected. Can be quickly switched to the shut-off state, and the hydraulic oil can be returned to prepare for the next clutch engagement operation.

  Corresponding to the first and second clutches 15A and 15B interposed between the engine E and the transmission M, it is common to a pair of hydraulic cylinders 35A and 35B individually connected to the clutches 15A and 15B. The oil pump 36, the second release oil passage 46, the second regulator valve 42, the connection oil passages 39A and 39B, the electromagnetic on-off valves 40A and 40B, the first release oil corresponding to the hydraulic cylinders 35A and 35B individually. Since the passages 45A and 45B and the first regulator valves 41A and 41B are provided, the first and second clutches 15A and 15B are disengaged / connected while reducing fuel consumption and reducing power consumption by reducing the drive loss of the engine E. Can be switched.

  Further, the control unit C is configured to change both connected oil passages 39A during a shift change in which one of the pair of clutches 15A and 15B is connected and the other is disconnected and the other is disconnected and the other is connected. 39B, the hydraulic pressure of one of the connecting oil passages is released by opening the first regulator valve while the electromagnetic on-off valve of the connecting oil passage is closed, and the oil pump is driven by the electric motor. The electromagnetic on-off valve of the other connection oil passage 39A, 39B needs to be closed by opening the electromagnetic on-off valve of the other connection oil passage and closing the electromagnetic on-off valve so as to maintain the oil pressure after reaching a predetermined oil pressure. Since the operation of the electric motor 37 is stopped except in a state where the hydraulic pressure is reduced to a value lower than that or when a shift change is performed, the power transmission by the gear trains G1 and G3 of the odd-numbered gears and the even-numbered gears are stopped. The pair of clutches 15A and 15B connected to the transmission M are controlled with the operation of the electric motor 37 being suppressed as much as possible in order to enable shift-up and shift-down by switching the power transmission by the gear trains G2 and G4. Power consumption can be reduced.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

15A, 15B ... clutches 35A, 35B ... hydraulic cylinder 36 ... oil pump 37 ... electric motors 39A, 39B ... connection oil passages 40A, 40B ... electromagnetic on-off valves 41A, 41B ... First regulator valve 42 ... second regulator valves 43A, 43B ... first oil pressure detector 44 ... second oil pressure detectors 45A, 45B ... first release oil passage 46 ... Second release oil path C ... Control unit E ... Engine M ... Transmission P ... Power unit

Claims (7)

  The engine (E), a transmission (M) that shifts power from the engine (E) and transmits the power to the drive wheels, and the power transmission state when the hydraulic cylinders (35A, 35B) are operated. (E) and a clutch (15A, 15B) interposed between the transmission (M), an oil pump (36) driven by an electric motor (37), and the oil pump ( 36) and the connecting oil passage (39A, 39B) connecting the hydraulic cylinders (35A, 35B), the electromagnetic on-off valve (40A, 40B) interposed in the connecting oil passage (39A, 39B), and the electric motor A control unit (C) for controlling the operation of the motor (37) and the electromagnetic on-off valves (40A, 40B), and the control unit (C) is connected to the clutch (15A, 15B). The clutch in the vehicle power unit is characterized in that the electromagnetic on-off valve (40A, 40B) is closed to maintain the hydraulic pressure of the hydraulic cylinder (35A, 35B) and the operation of the electric motor (37) is stopped. Control device.   A first release branching from between the electromagnetic on-off valve (40A, 40B) and the hydraulic cylinder (35A, 35B) of the connection oil passage (39A, 39B) and connected to the suction side of the oil pump (36) The vehicle according to claim 1, further comprising an oil passage (45A, 45B) and a first regulator valve (41A, 41B) interposed in the first release oil passage (45A, 45B). Clutch control device in the power unit.   A second release oil path branched from the oil pump (36) and the electromagnetic on-off valve (40A, 40B) of the connection oil path (39A, 39B) and connected to the suction side of the oil pump (36) (46) and a second regulator valve (42) that is interposed in the second release oil passage (46) and controlled by the control unit (C), the control unit (C) The clutch control device for a vehicle power unit according to claim 2, wherein the second regulator valve (42) is opened when the electromagnetic on-off valve (40A, 40B) is closed.   A first oil pressure detector (43A, 43B) for detecting oil pressure between the electromagnetic on-off valve (40A, 40B) and the hydraulic cylinder (35A, 35B) in the connection oil passage (39A, 39B); A second oil pressure detector (44) for detecting oil pressure between the oil pump (36) and the electromagnetic on-off valve (40A, 40B) in the passage (39A, 39B), and a first oil pressure detector and a second oil pressure detector. The control unit that controls the operation of the electric motor (37), the electromagnetic on-off valve (40A, 40B), the first regulator valve (41A, 41B), and the second regulator valve (42) according to the detected value. C), after closing the electromagnetic on-off valves (40A, 40B) and stopping the operation of the electric motor (37), the detected value of the first hydraulic pressure detector (43A, 43B) is more than the first predetermined value. Declined In this case, the electric motor (37) is restarted and the second regulator valve (so that the detection value of the second hydraulic pressure detector (44) reaches a second predetermined value higher than the first predetermined value). 42), the first hydraulic pressure detector (43A, 43B) is controlled by controlling the operation of the first regulator valve (41A, 41B) while the electromagnetic on-off valve (40A, 40B) is opened. When the maximum value of the clutch holding pressure that is higher than the first predetermined value and lower than the second predetermined value is reached, the electromagnetic on-off valves (40A, 40B) are closed and the electric motor ( 37. The clutch control device for a vehicle power unit according to claim 3, wherein the operation of 37) is stopped.   5. The vehicle power unit according to claim 4, wherein the control unit (C) controls the first regulator valve (41 </ b> A, 41 </ b> B) to be opened when the clutch (15 </ b> A, 15 </ b> B) is disconnected. Clutch control device.   A pair of hydraulic cylinders individually connected to the clutches (15A, 15B) corresponding to the pair of clutches (15A, 15B) interposed between the engine (E) and the transmission (M) The oil pump (36) common to (35A, 35B), the second release oil passage (46), the second regulator valve (42), and the connection individually corresponding to each hydraulic cylinder (35A, 35B) An oil passage (39A, 39B), the electromagnetic on-off valve (40A, 40B), a first release oil passage (45A, 45B), and a first regulator valve (41A, 41B) are provided. 4. A clutch control device for a vehicle power unit according to claim 3.   The transmission (M) includes a gear train (G1, G3) of odd-numbered gears that can be selectively established and a gear train (G2, G4) of even-numbered gears that can be selectively established. The clutches (15A, 15B) alternately switch between disengagement and connection, thereby transmitting power through the odd-numbered gear trains (G1, G3) and transmitting power through the even-numbered gear trains (G2, G4). The control unit (C) is connected to the transmission (M) to enable upshifting and downshifting by switching, and the control unit (C) has one of the pair of clutches (15A, 15B) being connected and the other being disconnected. At the time of a shift change in which one is cut off from the connected state and the other is connected, the hydraulic pressure of one of the connecting oil passages (39A, 39B) is set to the electromagnetic on-off valve (40A) of the connecting oil passage. , 40B) With the valve open, the first regulator valve (41A, 41B) is released by opening the valve, and the electric pump (36) is driven by the electric motor (37) while the other on-off solenoid valve (40A , 40B) is opened to reach a predetermined hydraulic pressure, the electromagnetic on-off valves (40A, 40B) are closed and the electric motor (37) is stopped so that the hydraulic pressure is maintained. The vehicle according to claim 6, characterized in that the operation of the electric motor (37) is stopped except in a state where the hydraulic pressure of the connecting oil passages (39A, 39B) drops below a required hydraulic pressure and during a shift change. Clutch control device for power unit.

Images