JP2006264462A - Hybrid vehicle driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hybrid vehicle driving device capable of reducing the cost thereof so that the energy efficiency is improved by separating an electric motor from a driving system. <P>SOLUTION: The driving device 10 to mount a continuously variable speed change mechanism 15 has an engine 11 and an electric motor 12, the engine 11 is driven by a main power source, and the electric motor 12 is auxiliarily driven when a vehicle is started. A rotor 39 of the electric motor 12 and a movable sheave 20b of a primary pulley 20 are provided with the centers of rotation overlap on each other, a spline tooth 40a is formed on the rotor 39, and a spline tooth 41a is formed on the movable sheave 20b. During the downshift for expanding the groove width of the primary pulley 20, the spline teeth 40a, 41a are engaged with each other to connect the electric motor 12 with a driving system. On the other hand, during the up-shift for reducing the groove width, the spline teeth 40a, 41a are disengaged from each other to separate the electric motor 12 from the driving system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drive device for a hybrid vehicle including a continuously variable transmission mechanism.

  Hybrid vehicle drive systems that use an engine and an electric motor as a drive source include a series system in which the engine is driven as a power source for power generation and an electric motor is driven as a power source for travel, and main power sources for travel There is a parallel system in which the engine is driven and the electric motor is auxiliaryly driven when starting or accelerating. In addition, a series / parallel system has been developed in which one or both of the electric motor and the engine are driven in accordance with the traveling situation by combining the series system and the parallel system.

By the way, many parallel-type and series-parallel type hybrid vehicles that transmit engine power to drive wheels improve the power performance of the vehicle by incorporating a speed change mechanism in the drive device. As such a drive device, a drive device has been proposed in which a belt-type continuously variable transmission mechanism is incorporated to continuously change engine power and motor power (see, for example, Patent Document 1). This drive device has an electric motor fixed to a primary pulley and an engine connected to the primary pulley via a clutch mechanism, and is driven using motor power by opening the clutch mechanism in a low speed range. While driving the wheels, the driving wheels are driven using engine power by fastening a clutch mechanism in the high speed range.
JP 2000-23313 A

  However, in the drive device described in Patent Document 1, since the electric motor is fixed to the primary pulley, the electric motor is used together with the primary pulley even in a high speed range where the electric motor is not used as a power source. It was supposed to rotate, and the engine power was wasted. In particular, a hybrid vehicle often employs a permanent magnet field-type electric motor including a permanent magnet, and the engine is subjected to a heavy load as drag torque is generated by the permanent magnet. In addition, it is possible to cancel the drag torque by the permanent magnet by suppressing the induced voltage by energization control on the electric motor, but executing such energization control wastes battery power. It was. As described above, rotating the electric motor with the engine power in a traveling situation in which the electric motor is not used as a power source has been a factor of reducing the energy efficiency of the hybrid vehicle.

  In order to avoid a decrease in energy efficiency, it is possible to disconnect the electric motor from the drive system according to the driving situation by providing a clutch mechanism in the electric motor. However, using the conventional clutch mechanism as it is Since it is necessary to secure hydraulic pressure and electric power for operating the mechanism, and a control means for executing engagement control of the clutch mechanism is also required, the cost of the driving device is increased.

  An object of the present invention is to achieve a reduction in cost of a drive device that improves energy efficiency by disconnecting an electric motor from a drive system.

  The hybrid vehicle drive device of the present invention is a hybrid vehicle drive device that includes an engine and an electric motor as power sources, and continuously changes power by changing the groove width of a pair of pulleys around which the drive belt is wound. A movable sheave that is provided on a rotary shaft connected to the engine so as to be axially movable and that forms one pulley together with a fixed sheave fixed to the rotary shaft, and the movable sheave and the rotation center overlap each other. Provided between the rotor that forms the electric motor together with the stator fixed to the housing, the movable sheave, and the rotor, and is switched between a fastening state and an open state by the axial movement of the movable sheave. And a clutch mechanism.

  In the hybrid vehicle drive device of the present invention, the clutch mechanism is switched to the engaged state by moving the movable sheave to the deceleration side, while the clutch mechanism is in the open state by moving the movable sheave to the acceleration side. It is characterized in that it can be switched to.

  The drive device for a hybrid vehicle according to the present invention is characterized in that an input-side primary pulley is formed by the movable sheave and the fixed sheave.

  In the hybrid vehicle drive device of the present invention, the clutch mechanism is a meshing clutch or a friction clutch.

  According to the present invention, the clutch mechanism that is switched between the engagement state and the release state by the axial movement of the movable sheave is provided between the movable sheave and the rotor. Can be controlled. As a result, during downshifts where a large driving torque is required, by connecting the pulley and the electric motor, the motor power can be transmitted to the pulley in addition to the engine power, and the power performance of the vehicle can be improved. It becomes possible. Also, at the time of upshift when a large driving torque is not required, the pulley and the electric motor are separated to prevent the rotor from rotating using the engine power, so the load on the engine can be reduced, It becomes possible to improve the fuel efficiency performance and exhaust performance of the engine. Moreover, since the clutch mechanism is mechanically switched between the engaged state and the released state according to the movement of the movable sheave in the axial direction, the cost of the drive device can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a skeleton diagram showing a hybrid vehicle drive apparatus 10 according to an embodiment of the present invention. As shown in FIG. 1, the drive device 10 includes an engine 11 and an electric motor 12 as power sources. The engine 11 is driven as a main power source when the vehicle travels, and the electric motor 12 assists when starting. Driven. That is, the illustrated driving device 10 is a driving device mounted on a parallel hybrid vehicle. The drive device 10 has a primary shaft 13 as a rotating shaft driven by the engine 11 and a secondary shaft 14 that is parallel to the primary shaft 13, and a belt between the primary shaft 13 and the secondary shaft 14. A continuously variable transmission mechanism 15 of the type is provided. The engine power and motor power shifted through the continuously variable transmission mechanism 15 are transmitted from the secondary shaft 14 to the left and right drive wheels 18 and 19 via the speed reduction mechanism 16 and the differential mechanism 17.

  A primary pulley 20 is provided on the primary shaft 13, and the primary pulley 20 is mounted on the primary shaft 13 so as to be movable in the axial direction opposite to the fixed sheave 20 a fixed to the primary shaft 13. Movable sheave 20b. Further, the secondary shaft 14 is provided with a secondary pulley 21. The secondary pulley 21 is fixed to the secondary shaft 14 and a stationary sheave 21a, and is opposed to the secondary shaft 14 so as to be movable in the axial direction of the secondary shaft 14. And a movable sheave 21b to be mounted.

  A driving belt 22 is wound around the primary pulley 20 and the secondary pulley 21, and the primary shaft 13 is changed by changing the pulley groove width between the primary pulley 20 and the secondary pulley 21 and changing the winding diameter of the driving belt 22. Can be transmitted to the secondary shaft 14 in a stepless manner. If the winding diameter of the drive belt 22 around the primary pulley 20 is Rp and the winding diameter around the secondary pulley 21 is Rs, the transmission ratio of the continuously variable transmission mechanism 15 is Rs / Rp.

  In order to change the pulley groove width of the primary pulley 20, a plunger 23 is fixed to the primary shaft 13, and a primary cylinder 24 movably contacting the outer peripheral surface of the plunger 23 is fixed to the movable sheave 20 b. A hydraulic oil chamber 25 is defined by the primary cylinder 24 and the primary cylinder 24. On the other hand, in order to change the pulley groove width of the secondary pulley 21, a plunger 26 is fixed to the secondary shaft 14, and a secondary cylinder 27 that is movably in contact with the outer peripheral surface of the plunger 26 is fixed to the movable sheave 21b. The hydraulic oil chamber 28 is partitioned by the plunger 26 and the secondary cylinder 27. The pulley groove widths of the pulleys 20 and 21 are controlled by adjusting the primary pressure Pp introduced into the primary hydraulic fluid chamber 25 and the secondary pressure Ps introduced into the secondary hydraulic fluid chamber 28. The

  A torque converter 30 and a forward / reverse switching mechanism 31 are provided between the crankshaft 11 a and the primary shaft 13 in order to transmit engine power to the primary pulley 20. The torque converter 30 includes a pump shell 30a connected to the crankshaft 11a and a turbine runner 30b facing the pump shell 30a. A turbine shaft 32 is connected to the turbine runner 30b. In addition, a lock-up clutch 33 for fastening the crankshaft 11a and the turbine shaft 32 is incorporated in the torque converter 30 according to the traveling state.

  The forward / reverse switching mechanism 31 includes a double pinion planetary gear train 34, a forward clutch 35, and a reverse brake 36. By operating the forward clutch 35 and the reverse brake 36, an engine power transmission path is provided. Is switched. When both the forward clutch 35 and the reverse brake 36 are released, the turbine shaft 32 and the primary shaft 13 are disconnected, and the forward / reverse switching mechanism 31 is switched to a neutral state in which engine power is not transmitted to the primary shaft 13. When the forward clutch 35 is engaged with the reverse brake 36 released, the rotation of the turbine shaft 32 is transmitted to the primary pulley 20 as it is, while the forward clutch 35 is released. When the reverse brake 36 is engaged, the rotation of the turbine shaft 32 is reversed and transmitted to the primary pulley 20.

  The electric motor 12 that outputs motor power toward the primary pulley 20 includes a stator 38 that is fixed to the housing 37 and a rotor 39 that is rotatably supported by the primary shaft 13. A coil 38a is wound around the laminated plate to be formed, and a permanent magnet (not shown) is incorporated in the laminated plate forming the rotor 39. The rotor 39 of the electric motor 12 is provided with a sleeve 40 extending toward the primary cylinder 24, and spline teeth 40 a are formed on the outer peripheral surface of the sleeve 40. The primary cylinder 24 is provided with a sleeve 41 extending toward the rotor 39, and spline teeth 41 a that mesh with the spline teeth 40 a of the rotor 39 are formed on the inner peripheral surface of the sleeve 41. The rotor 39 and the movable sheave 20b are provided on the primary shaft 13, and the respective rotation centers overlap each other.

  Next, the control system of the drive device 10 will be described. FIG. 2 is a schematic diagram showing a control system of the driving apparatus 10. As shown in FIG. 2, an oil pump 42 driven by the engine 11 is provided in the drive device 10 in order to supply hydraulic oil to the primary pulley 20 and the secondary pulley 21. The secondary pressure path 43 connected to the discharge port of the oil pump 42 is connected to the hydraulic oil chamber 28 of the secondary pulley 21 and to the pressure adjusting port 44 a of the secondary pressure adjusting valve 44. The secondary pressure Ps regulated by the secondary pressure regulating valve 44 is supplied to the hydraulic oil chamber 28 of the secondary pulley 21 via the secondary pressure path 43 and moves the movable sheave 21b in the axial direction, thereby The secondary pulley 21 is tightened so as to suppress slippage.

  The secondary pressure path 43 is connected to the input port 45 a of the primary pressure adjustment valve 45, and the primary pressure path 46 extending from the output port 45 b of the primary pressure adjustment valve 45 is connected to the hydraulic oil chamber 25 of the primary pulley 20. Yes. The primary pressure Pp regulated by the primary pressure regulating valve 45 is supplied to the hydraulic oil chamber 25 of the primary pulley 20 via the primary pressure path 46, and the movable sheave 20b is moved in the axial direction, whereby the primary pulley 20 The gear ratio is set by controlling the pulley groove width.

  Here, the primary pressure Pp is a pressure obtained by reducing the secondary pressure Ps. Since the pressure receiving area of the hydraulic oil chamber 25 is set larger than that of the hydraulic oil chamber 28, the primary pulley Pp is controlled by controlling the primary pressure Pp. The groove width of the secondary pulley 21 can be changed via the drive belt 22 while changing the groove width of 20. The secondary pressure adjusting valve 44 and the primary pressure adjusting valve 45 are electromagnetic pressure control valves, respectively. By controlling the current value supplied from the CVT control unit 47 to the solenoid coils 44b and 45c, the secondary pressure Ps and the primary pressure Pp are controlled. The pressure can be adjusted.

  As described above, the CVT control unit 47 that executes the shift control of the continuously variable transmission mechanism 15 includes a microprocessor (CPU) (not shown), and the CPU includes a ROM, a RAM, and an I / O port via a bus line. Is connected. The ROM stores control programs, various map data, and the like, and the RAM temporarily stores data calculated by the CPU. The CPU can detect the vehicle running state from various sensors via the I / O port. The detection signal shown is input. As various sensors for inputting a detection signal to the CVT control unit 47, a primary rotational speed sensor 50 for detecting the rotational speed of the primary pulley 20, a secondary rotational speed sensor 51 for detecting the rotational speed of the secondary pulley 21, and an operation amount of an accelerator pedal. An accelerator pedal sensor 52 for detecting the accelerator opening, a vehicle speed sensor 53 for detecting the vehicle speed, a throttle opening sensor 54 for detecting the throttle opening of the throttle valve, an engine speed sensor 55 for detecting the engine speed Ne, and the like. is there.

  Further, the drive device 10 is provided with an engine control unit 56 that controls the drive of the engine 11 and a motor control unit 57 that controls the drive of the electric motor 12. Similar to the CVT control unit 47 described above, the control units 56 and 57 are provided with a CPU, a ROM, a RAM, and the like, and are input with a throttle opening, a vehicle speed, a primary rotational speed, a secondary rotational speed, and the like. The engine control unit 56 controls the engine speed and the engine torque by outputting a control signal to a throttle valve, an injector, a spark plug, etc. (not shown), while the motor control unit 57 controls the inverter 58. By outputting a signal, the direct current output from the battery 59 is converted into an alternating current and supplied to the electric motor 12 to control the motor speed and the motor torque. Further, by operating the electric motor 12 as a generator at the time of deceleration or the like, the alternating current generated by the electric motor 12 is converted into direct current through the inverter 58 and collected by the battery 59. . The CVT control unit 47, the engine control unit 56, and the motor control unit 57 are connected to each other via a communication cable or the like, and the continuously variable transmission mechanism 15, the engine 11, and the electric motor 12 are controlled in cooperation with each other. It has become so.

  Hereinafter, the shift control of the continuously variable transmission mechanism 15 by the CVT control unit 47 will be described. FIG. 3 is a block diagram showing a shift control system of the CVT control unit 47. As shown in FIG. 3, the CVT control unit 47 includes a target primary rotational speed calculation unit 60, a target gear ratio calculation unit 61, a hydraulic pressure ratio calculation unit 62, and a target primary pressure calculation unit 63 in order to calculate the target primary pressure Pp. I have. The target primary rotation speed calculation unit 60 calculates the target primary rotation speed Np by referring to the speed change characteristic map based on the vehicle speed and the throttle opening, and the target gear ratio calculation unit 61 calculates the target primary rotation speed Np and the actual secondary speed. A target gear ratio is calculated based on the rotational speed Ns ′. Next, the hydraulic ratio calculation unit 62 calculates the hydraulic ratio (Pp / Ps) between the target primary pressure Pp and the target secondary pressure Ps corresponding to the target speed ratio i, and the target primary pressure calculation unit 63 calculates the hydraulic ratio. The target primary pressure Pp is calculated by multiplying the target secondary pressure Ps.

  In addition, the CVT control unit 47 includes an actual gear ratio calculation unit 64, a feedback value calculation unit 65, and an addition unit 66 in order to perform feedback control of the target primary pressure Pp. The actual gear ratio calculation unit 64 calculates the actual gear ratio i ′ based on the actual primary rotation speed Np ′ and the actual secondary rotation speed Ns ′, and the feedback value calculation unit 65 calculates the actual gear ratio i ′ and the target gear ratio. A feedback value is calculated based on i. Next, the adding unit 66 adds the feedback value to the target primary pressure Pp, and the target primary pressure Pp is feedback-controlled. Based on the target primary pressure Pp subjected to feedback control, the primary pressure adjusting valve 45 is controlled, and the groove width of the primary pulley 20 is adjusted.

  Furthermore, the CVT control unit 47 includes an input torque calculation unit 67, a required secondary pressure calculation unit 68, and a target secondary pressure calculation unit 69 in order to calculate the target secondary pressure Ps. The input torque calculating unit 67 calculates the input torque Ti input from the engine 11 to the primary shaft 13 based on the engine speed and the throttle opening, and the required secondary pressure calculating unit 68 is based on the target gear ratio i. To calculate the required secondary pressure. The input torque Ti and the required secondary pressure are input to the target secondary pressure calculation unit 69, and the target secondary pressure calculation unit 69 calculates the target secondary pressure Ps. Based on the target secondary pressure Ps, the primary pressure adjustment valve 45 is controlled, and the secondary pulley 21 generates a tightening force commensurate with the transmission torque capacity of the drive belt 22.

  FIG. 4 is a diagram showing an example of a shift characteristic map referred to when the shift control is executed. As shown in FIG. 4, a characteristic line Low indicating the maximum transmission ratio (low state) and a characteristic line OD indicating the maximum transmission ratio (overdrive state) are set in the transmission characteristic map, and these characteristic lines Low are set. , OD, a plurality of characteristic lines T1 to T8 corresponding to the throttle opening are set. When the throttle opening is low, the target primary rotation speed Np is calculated according to the characteristic line T1, and as the throttle opening increases, the target primary rotation speed Np is calculated according to the characteristic lines T2 to T7. When the throttle opening is fully opened, the target primary rotational speed Np is calculated according to the characteristic line T8. Further, when the throttle opening is increased in the low vehicle speed range, the target primary rotational speed Np is set along the characteristic line Low, whereas when the throttle opening is decreased in the high vehicle speed range, the characteristic line OD is set. The target primary rotational speed Np is set along

  For example, when the accelerator pedal is fully opened to accelerate the vehicle from a stopped state, the target primary rotational speed Np is increased along the characteristic line Low, reaching point A, and the gear ratio is changed to the overdrive side. And reaches the point B while slightly increasing the target primary rotational speed Np. When the accelerator pedal is released from this state, the gear ratio is changed to the overdrive side and the target primary rotational speed Np is decreased while reaching the point C, and the target primary rotational speed Np is decreased along the characteristic line OD. While reaching D point. Then, the point E is reached while changing the gear ratio to the low side, and the vehicle stops with the gear ratio maintained on the low side. In actual traveling, the throttle opening changes according to the driver's operation, and therefore the target primary rotational speed Np is appropriately set within the range of the thick lines indicated by points A to E in FIG. .

  Here, as shown in FIG. 4, a predetermined speed ratio X is shown in the speed change characteristic map, and when the speed ratio is downshifted to a low side exceeding this speed ratio X, the engine power and When the parallel running mode is set in which both the motor power and the drive wheels are transmitted, when the speed ratio is below the speed ratio X and the speed ratio is upshifted to the overdrive side, only the engine power is transmitted to the drive wheels. The engine running mode is set.

  Next, switching between the parallel traveling mode and the engine traveling mode will be described. FIG. 5 is a skeleton diagram showing the continuously variable transmission mechanism 15 and the electric motor 12. FIG. 5A shows a state where the parallel traveling mode is set, and FIG. 5B shows a state where the engine traveling mode is set. .

  First, as shown in FIG. 5 (A), in order to widen the groove width of the primary pulley 20 and downshift the gear ratio to the low side, when the movable sheave 20b is moved in the direction approaching the rotor 39 (deceleration side), When the speed ratio X exceeds the spline teeth 41a, the spline teeth 41a start to mesh with the spline teeth 40a, and when the speed ratio reaches the characteristic line Low, the meshing margin of the spline teeth 40a and 41a becomes maximum. In other words, while the gear ratio X is exceeded and the gear is shifted to the low side, the rotor 39 and the movable sheave 20b can be connected via the spline teeth 40a and 41a that mesh with each other, and the engine power and the motor power can be connected. It is possible to set the parallel traveling mode to be transmitted to the drive wheels.

  On the other hand, as shown in FIG. 5B, in order to narrow the groove width of the primary pulley 20 and upshift the gear ratio to the overdrive side, the movable sheave 20b is moved in the direction away from the rotor 39 (speed increasing side). When the speed ratio X falls below, the spline teeth 40a and 41a are disengaged, so that the rotor 39 and the movable sheave 20b can be separated. That is, since the motor power from the electric motor 12 can be cut off while shifting to the overdrive side below the speed ratio X, it is possible to set the engine running mode in which only engine power is transmitted to the drive wheels. It becomes possible. Thus, the mesh clutch 70 as a clutch mechanism is formed by both the spline teeth 40a and 41a, and the mesh clutch 70 can be switched between the engaged state and the released state by the axial movement of the movable sheave 20b. ing.

  As described above, by using the meshing clutch 70 that can be switched between the engaged state and the released state according to the gear ratio, the primary pulley 20 and the electric motor 12 are connected at the time of downshift where a large driving torque is required. By doing so, motor power can be transmitted to the primary pulley 20 in addition to engine power, and the power performance of the vehicle can be improved. Further, at the time of upshift where a large driving torque is not required, the primary pulley 20 and the electric motor 12 can be separated, so that the rotor 39 is not rotated using the engine power, and the load on the engine 11 is reduced. It is possible to reduce the fuel consumption performance and exhaust performance of the engine 11 while reducing it. In addition, the meshing clutch 70 has a very simple structure that can be mechanically switched between the engaged state and the released state according to the movement of the primary pulley 20, so that it is possible to reduce the cost of the drive device 10. It becomes.

  Further, in the illustrated case, the mesh clutch 70 is formed by the spline teeth 40a and 41a provided in the rotor 39 and the primary cylinder 24, but a synchromesh mechanism may be provided as a clutch mechanism. When the synchromesh mechanism is provided, the rotational speed of the rotor 39 and the primary cylinder 24 can be synchronized by the frictional force of the synchronizer ring, and the spline teeth can be meshed under this state, and the running mode can be made smooth. It is possible to switch.

  FIG. 6 is a skeleton diagram showing a hybrid vehicle drive device 71 according to another embodiment of the present invention. In addition, about the member same as the member shown in FIG. 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted. As shown in FIG. 6, the drive device 71 is provided with a multi-plate friction clutch 72 as a clutch mechanism for transmitting motor power to the primary pulley 20. The friction clutch 72 has a drive plate 72 a and a driven plate 72 b that are alternately stacked. The drive plate 72 a is attached to the sleeve 40 of the rotor 39 that extends toward the primary cylinder 24, while the driven plate 72 b is attached to the rotor 39. It is attached to the sleeve 41 of the primary cylinder 24 that extends toward. That is, when the movable sheave 20b is moved in the direction approaching the rotor 39 (deceleration side) in order to downshift the gear ratio to the low side, the drive plate 72a and the driven plate 72b are pressed against each other, and the friction clutch 72 Is switched to the engaged state, and the movable sheave 20b is moved in the direction away from the rotor 39 (increase speed side) in order to upshift the gear ratio to the overdrive side, the drive plate 72a and the driven plate 72b The pressed state is released, and the friction clutch 72 is switched to the released state. As described above, when the friction clutch 72 is used as the clutch mechanism, the engaged state and the released state can be smoothly switched, and the traveling mode can be smoothly switched.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. In the illustrated case, the electric motor 12 is provided concentrically with the primary pulley 20. However, the present invention is not limited to this, and the electric motor 12 may be provided concentrically with the secondary pulley 21. In this case, a clutch mechanism is provided between the secondary cylinder and the electric motor 12.

  Further, when the meshing clutch 70 and the friction clutch 72 are switched to the engaged state, the motor rotation speed may be synchronized with the primary rotation speed by driving the electric motor 12 in advance. In this way, by engaging the meshing clutch 70 and the friction clutch 72 in a state in which the rotational difference between the rotor 39 and the movable sheave 20b is eliminated, it is possible to avoid an engagement shock when switching to the parallel travel mode. Vehicle quality can be improved.

  Further, in the above description, when the gear ratio X is exceeded and downshifted to the low side, both the engine power and the motor power are transmitted to the drive wheels 18 and 19, but this is not limited thereto. However, only the motor power may be transmitted to the drive wheels 18 and 19 by releasing the forward clutch 35 and the reverse brake 36.

1 is a skeleton diagram showing a drive device for a hybrid vehicle according to an embodiment of the present invention. It is the schematic which shows the control system of a drive device. It is a block diagram which shows the transmission control system of a CVT control unit. It is a diagram which shows an example of the speed change characteristic map referred when performing speed change control. It is a skeleton diagram showing a continuously variable transmission mechanism and an electric motor, where (A) shows a state in which a parallel running mode is set, and (B) shows a state in which an engine running mode is set. It is a skeleton figure which shows the drive device of the hybrid vehicle which is other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Drive apparatus 11 Engine 12 Electric motor 13 Primary shaft (rotary shaft)
20 Primary pulley (pulley)
20a Fixed sheave 20b Movable sheave 21 Secondary pulley (pulley)
22 Drive belt 37 Housing 38 Stator 39 Rotor 40a Spline teeth 41a Spline teeth 70 Engagement clutch (clutch mechanism)
71 Driving device 72 Friction clutch (clutch mechanism)
72a Drive plate 72b Driven plate

Claims (4)

A drive device for a hybrid vehicle that includes an engine and an electric motor as a power source and continuously changes power by changing the groove width of a pair of pulleys around which a drive belt is wound,
A movable sheave that is provided on a rotary shaft connected to the engine so as to be axially movable, and that forms one of the pulleys together with a fixed sheave fixed to the rotary shaft;
A rotor that forms the electric motor together with a stator that is provided so that the movable sheave and the rotation center overlap each other and is fixed to a housing;
A drive device for a hybrid vehicle, comprising: a clutch mechanism that is provided between the movable sheave and the rotor and is switched between an engaged state and an opened state by an axial movement of the movable sheave.   2. The drive device for a hybrid vehicle according to claim 1, wherein the clutch mechanism is switched to an engaged state by moving the movable sheave to a deceleration side, while the clutch mechanism is moved to an acceleration side by moving the movable sheave to a speed increasing side. A drive device for a hybrid vehicle, which is switched to an open state.   3. The hybrid vehicle drive apparatus according to claim 1, wherein an input-side primary pulley is formed by the movable sheave and the fixed sheave.   The hybrid vehicle drive device according to any one of claims 1 to 3, wherein the clutch mechanism is a mesh clutch or a friction clutch.

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