JP5936262B2 - Clutch control device in power unit for vehicle - Google Patents

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, a first release oil passage branched from the electromagnetic on-off valve of the connecting oil passage and the hydraulic cylinder and connected to the suction side of the oil pump, and the first release oil passage A first regulator valve interposed; a second release oil passage branched from between the oil pump and the electromagnetic on-off valve of the connection oil passage; and connected to the suction side of the oil pump; A second regulator valve which is interposed in the release oil passage, said electric motor, prior SL solenoid valve, and a control unit for controlling the operation of the second regulator valve, wherein the control unit, the clutch in connection with operation of the electric motor is stopped with holding the pressure of the said closed switch valve hydraulic cylinder, wherein in the closed state of the solenoid valve opening the second regulator valve This is a first feature.

In addition to the configuration of the first 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 detector detecting a hydraulic pressure between the solenoid valve, the electric motor in accordance with the detected value of the first and second hydraulic detectors, the solenoid valves, the first regulator valve and the The control unit for controlling the operation of the second regulator valve has the detection value of the first hydraulic pressure detector lower than a first predetermined value after closing the electromagnetic on-off valve and stopping the operation of the electric motor. sometimes after the detected value of the second hydraulic detectors causes reactivated the electric motor is controlling the second regulator valve to reach the second predetermined value higher than the first predetermined value, the electromagnetic switching Opened the valve Maximum value of state at the first regulator valve first by controlling the operation of the hydraulic detector detecting value is lower than a second predetermined value higher than the first predetermined value the clutch holding pressure The second feature is that the electromagnetic on-off valve is closed and the operation of the electric motor is stopped when reaching the value.

The present invention, in addition to the second feature, the control unit is in the disconnected state of the clutch and the third control means controls the first regulator valve to open.

In addition to the configuration of the first 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. Do the oil pump, and a second release oil passage and the second regulator valve, said connecting oil channel individually corresponding to the respective hydraulic cylinders, the solenoid valve, the first release oil passage and said first regulator A fourth feature is that a valve is provided.

Furthermore, in addition to the configuration of the fourth feature of the present invention, 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. one of connecting oil channel pressure of the road as well as released by opening the first regulator valve while closes the solenoid valve of the connection oil passage, the oil pump by the electric motor In the driven 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, A fifth feature is that the operation of the electric motor is stopped except in a state where the oil pressure of both the connecting oil passages is lower than a required oil pressure or 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. Moreover, while the clutch is engaged, the electromagnetic on-off valve is closed and the hydraulic pressure is held in the hydraulic cylinder, so that the electric motor can be stopped and power consumption can be suppressed. The hydraulic pressure acting on the cylinder can be adjusted with the first regulator valve, the hydraulic pressure of the hydraulic cylinder can be adjusted with a simple structure, the hydraulic pressure of the connecting oil passage can be adjusted with the second regulator valve, by opening the second regulator valve when the valve is closed the solenoid valve, avoiding connecting oil passage between the oil pump and the solenoid valve is wastefully high pressure, which can contribute to durability .

  According to the second feature 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 reduced 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 a third aspect of the present invention, since the cut-off state of the clutch the first regulator valve is opened, can be promptly switched to the cutoff state of the clutch from the connected state, also returns the hydraulic oil in the next clutch It is possible to prepare for the connection operation.

  According to the fourth feature of the present invention, the pair of clutches can be switched between on and off while reducing fuel consumption and reducing power consumption by reducing engine drive loss.

  Further, according to a fifth aspect of the present invention, the transmission is coupled 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 electric motor 37, the solenoid valves 40A, 40B, the first regulator valve 41A, 41B and the operation of the second regulator valve 42 is intended to be controlled by the control unit C, the control unit C Are detected 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 detection value of the second oil pressure detector 44 that detects the oil pressure between the oil pump 36 and the solenoid on-off valves 40A and 40B in the connection oil passages 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 and connection state during starting of the motorcycle, as shown in Figure 3, the hydraulic oil discharged from the oil pump 36 driven by an electric motor 37, the second regulator valve 42 The pressure is supplied to the first hydraulic cylinder 35A in response to the opening of the electromagnetic on-off valve 40A, and the first clutch 15A is connected by operating the first hydraulic cylinder 35A.

The solenoid valves 40A, 40B, the first and second clutches 15A, while connecting the corresponding clutch of 15B is controlled by the control unit C as closed, in which the second regulator valve 42 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 during connection the first clutch 15A, the electromagnetic on-off valve 40A is closed as shown in Figure 4, the second regulator valve 42 is opened, 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 detected value of the second hydraulic detector 44 controls the second regulator valve 42 to reach the second predetermined value higher than the first predetermined value, while opening the electromagnetic on-off valve 40A maximum value of the first regulator valve 41A clutch holding pressure detection value of the first hydraulic detector 43A by controlling the operation is lower than a second predetermined value higher than the first predetermined value When reaching the above, 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 valve 40B, the first regulator valve 41A, which controls the operation of the second regulator valve 42.

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. , state one of the connecting oil channel pressure of 39B as well as released by opening the first regulator valve while closes the solenoid valve of the connection oil passage, which drives the oil pump by the electric motor Then, after opening the electromagnetic on-off valve of the other connecting oil passage and reaching a predetermined oil pressure, the electromagnetic on-off valve is closed so as to maintain the oil pressure, for example, the first clutch 15A is shut off. and, at the time of shift which is adapted to connect the second clutch 15B, as shown in Figure 5, the control unit C is pre remain closed the first clutch 15A side of the electromagnetic valve 40B With releasing the hydraulic pressure of the first regulator valve 41A connecting oil passage to open the 39A, predetermined by opening the electromagnetic valve 40B for connecting oil passage 39B in a state of driving the oil pump 36 by the electric motor 37 After reaching the hydraulic pressure, 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. 45A, the 45B, the first regulator valve 41A, since 41B is interposed, the electromagnetic on-off valve 40A, the first and second hydraulic cylinder 35A in a state in which 40B is closed, the hydraulic pressure applied to 35B the The pressure can be regulated by the first regulator valves 41A and 41B, and the hydraulic pressure of the first and second hydraulic cylinders 35A and 35B can be adjusted with a simple structure.

The connection oil passage 39A, 39B of the oil pump 36 and the electromagnetic on-off valve 40A, the second regulator valve 42 to the second release oil passage 46 connected to the suction side of the oil pump 36 branched from between 40B is mediated is set, the control unit C for controlling the second regulator valve 42, since the electromagnetic opening and closing valve 40A, in the closed state of 40B to open the second regulator valve 42, the oil pump 36 and the solenoid valve 40A , 40B can avoid unnecessary high pressure in the connecting oil passages 39A, 39B and contribute to improved 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 the detected value of the second hydraulic detector 44 controls the second regulator valve 42 to reach the second predetermined value higher than the first predetermined value causes reactivated the motor 37 , Solenoid valves 40A, the 40B while opening the first regulator valve 41A, a first hydraulic detector 43A by controlling the operation of 41B, higher than the detection value of the 43B is a first predetermined value When the maximum value of the clutch holding pressure that is lower than the second predetermined value is reached, the electromagnetic on-off valves 40A and 40B are closed and the operation of the electric motor 37 is stopped. The oil pressure acting on the first and second hydraulic cylinders 35A and 35B can be sufficiently maintained while minimizing power consumption.

The control unit C is, first and second clutches 15A, the in cut-off state of 15B first regulator valve 41A, and controls the 41B in the open state, the first and second clutches 15A, and 15B connected It is possible to quickly switch from the state to the shut-off state, and return the hydraulic oil 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. oil pump 36, a second release oil passage 46 and the second regulator valve 42, the hydraulic cylinders 35A, connecting oil passage 39A corresponding individually to 35B, 39B, solenoid valves 40A, 40B, the first release oil passages 45A, 45B, the first regulator valve 41A, so and a 41B, first and second clutches 15A while achieving suppression of reduction of fuel consumption by the drive loss reduction of the engine E and the power consumption, 15B cross the・ The connection 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. , state one of the connecting oil channel pressure of 39B as well as released by opening the first regulator valve while closes the solenoid valve of the connection oil passage, which drives the oil pump by the electric motor Then, after opening the electromagnetic on / off valve of the other connecting oil passage and reaching a predetermined oil pressure, the electromagnetic on / off valve is closed so as to maintain the oil pressure, and the oil pressure of both the connecting oil passages 39A and 39B is increased. Since the operation of the electric motor 37 is stopped except in a state where the hydraulic pressure has decreased below the required hydraulic pressure and at the time of a shift change, the power transmission by the gear trains G1 and G3 at the odd-numbered shift stages and the even-number change are performed. The pair of clutches 15A and 15B connected to the transmission M to control the pair of clutches 15A and 15B 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. Thus, 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 (5)

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 vehicle power unit comprising a clutch (15A, 15B) interposed between the transmission (M),
An oil pump (36) driven by an electric motor (37), a connection oil passage (39A, 39B) connecting the oil pump (36) and the hydraulic cylinder (35A, 35B), and the connection oil passage (39A , 39B) branches from between the electromagnetic on-off valve (40A, 40B), the electromagnetic on-off valve (40A, 40B) of the connecting oil passage (39A, 39B) and the hydraulic cylinder (35A, 35B). The first release oil passage (45A, 45B) connected to the suction side of the oil pump (36) and the first regulator valve (45A, 45B) interposed in the first release oil passage (45A, 45B) 41A, 41B) and the connection between the oil pump (36) and the solenoid on-off valve (40A, 40B) of the connecting oil passage (39A, 39B) and connected to the suction side of the oil pump (36). 2 release oil passage (46), a second regulator valve that will be interposed in the second release oil passage (46) and (42), the electric motor (37), before SL solenoid valve (40A, 40B And a control unit (C) for controlling the operation of the second regulator valve (42) ,
While the clutch (15A, 15B) is connected, the control unit (C) closes the electromagnetic on-off valve (40A, 40B) to maintain the hydraulic pressure of the hydraulic cylinder (35A, 35B) and the electric motor. (37) stops the operation of the solenoid valves (40A, 40B) clutch control apparatus in a power unit for a vehicle, characterized by opening the second regulator valve (42) in the closed state of the. 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 electric motor in accordance with the detected value (37), said solenoid valve (40A, 40B), the first regulator valve (41A, 41B) and the control for controlling the operation of the second regulator valve (42) After the unit (C) closes the electromagnetic on-off valves (40A, 40B) and stops the operation of the electric motor (37), the detection value of the first hydraulic pressure detector (43A, 43B) is the first predetermined value. than The electric motor (37) causes re-actuating the second hydraulic detectors (44) of the detected value of the first predetermined value higher second the second regulator valve so as to reach a predetermined value than when the beat after controlling (42), said solenoid valve (40A, 40B) of the first regulator valve while opening the (41A, 41B) first hydraulic detector by controlling the operation of (43A, When the detected value of 43B) reaches the 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 (40A, 40B) is closed and the electric motor is operated. The clutch control device for a vehicle power unit according to claim 1, characterized in that the operation of the motor (37) is stopped. Wherein the control unit (C) The vehicular power unit according to claim 2, wherein the controller controls the first regulator valve (41A, 41B) in the open state with a blocking state of the clutch (15A, 15B) 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) (35A, 35B) common the oil pump (36), the corresponding individual second release oil passage (46) and said second regulator valve (42), to the hydraulic cylinders (35A, 35B) connecting oil passage (39A, 39B), said solenoid valve (40A, 40B), characterized in that it comprises first release oil passage (45A, 45B) and the first regulator valve and (41A, 41B) The clutch control apparatus in the power unit for vehicles of Claim 1. 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) The remains were valve first regulator valve (41A, 41B) as well as released by opening of the electric motor (37) by the oil pump (36) while in a state of driving the connection oil passage solenoid valve ( 40A, 40B) are opened, and after reaching a predetermined hydraulic pressure, the electromagnetic on-off valve (40A, 40B) is closed and the operation of the electric motor (37) is stopped so as to maintain the hydraulic pressure. 5. The operation of the electric motor (37) is stopped except in a state where the oil pressure of both the connecting oil passages (39 </ b> A, 39 </ b> B) is reduced below a required oil pressure and during a shift change. A clutch control device for a vehicle power unit.

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