IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0426244
(2006-06-23)
|
등록번호 |
US-7527111
(2009-07-01)
|
우선권정보 |
JP-2005-184142(2005-06-23) |
발명자
/ 주소 |
- Katsuhiro, Arai
- Saitou, Tetsushi
|
출원인 / 주소 |
- Yamaha Hatsudoki Kabushiki Kaisha
|
대리인 / 주소 |
Knobbe, Martens, Olson & Bear, LLP
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
59 |
초록
▼
An engine produces power, which is distributed by a power distribution device to an electric generator and a rear wheel. A motor produces power other than that produced by the engine to drive the rear wheel. A battery stores electricity generated by the electric generator and supplies electricity to
An engine produces power, which is distributed by a power distribution device to an electric generator and a rear wheel. A motor produces power other than that produced by the engine to drive the rear wheel. A battery stores electricity generated by the electric generator and supplies electricity to the electric generator and the motor. A hybrid control unit (HCU) controls the engine, the electric generator and the motor. The HCU drives a decompression device provided in the engine to reduce the pressure inside an engine cylinder created while cranking the engine, in order to stop the engine.
대표청구항
▼
What is claimed is: 1. A hybrid vehicle, comprising: an engine for producing power; a first rotary electric machine configured to operate as at least one of an electric generator and an electric motor; a power distribution device configured to distribute the power produced by the engine to the firs
What is claimed is: 1. A hybrid vehicle, comprising: an engine for producing power; a first rotary electric machine configured to operate as at least one of an electric generator and an electric motor; a power distribution device configured to distribute the power produced by the engine to the first rotary electric machine and to a driving wheel; a second rotary electric machine configured to operate as at least one of an electric motor and an electric generator to produce power to drive the driving wheel; a battery that stores electricity generated by the first rotary electric machine and supplies electricity to at least one of the second rotary electric machine and the first rotary electric machine; and a driving device including: a pressure reduction device provided in the engine for reducing a compression pressure inside a cylinder of the engine created while cranking the engine; and a controller configured to control the pressure reduction device so as to reduce the compression pressure inside the engine cylinder when stopping the engine, the controller also configured to control at least some operations of the engine, the first rotary electric machine and the second rotary electric machine, wherein the controller, when stopping the engine, reduces a rotational speed of the engine via the power distribution device by controlling the first rotary electric machine, by stopping ignition of and fuel supply to the engine, by closing a throttle valve, and by reducing the compression pressure inside the engine cylinder via the pressure reduction device. 2. A hybrid vehicle according to claim 1, wherein, when braking the vehicle to stop the engine, the controller controls the pressure reduction device to perform the pressure reducing operation, and controls the second rotary electric machine to perform power regeneration to generate electricity that is transmitted to the battery to charge the battery. 3. A hybrid vehicle according to claim 2, wherein, when the storage battery is charged up to its full capacity, the controller stops the pressure reducing operation of the pressure reduction device and the regeneration operation of the second rotary electric machine to cause the engine to rotate through torque transmitted from the driving wheel and generated as the vehicle runs, and the controller synchronizes a deceleration rate achieved through the regeneration operation of the second rotary electric machine with a deceleration rate achieved with the regeneration operation of the second rotary electric machine stopped. 4. A hybrid vehicle according to claim 1, wherein the pressure reduction device operates using a power medium other than hydraulic pressure of the engine. 5. A hybrid vehicle according to claim 1, wherein the driving device further comprises: an accelerator opening detector coupled with an accelerator and communicating an accelerator opening to the controller; and a vehicle speed detector communicating a detected vehicle speed to the controller, wherein the controller includes an engine state determination section for determining whether or not to stop the engine based on the input accelerator opening and vehicle speed, and is configured to stop the engine based on the determination to stop the engine by the engine state determination section. 6. A hybrid vehicle according to claim 1, wherein the driving device further comprises: a brake detector for detecting an amount of brake operation by a user, wherein the controller includes a brake determination section for determining whether or not the vehicle is braking based on the input accelerator opening, vehicle speed and brake operation amount when the engine state determination section determines not to stop the engine, and when the brake determination section determines that the vehicle is braking, and wherein the controller is configured to cause the second rotary electric machine or the engine to through torque of the driving wheel by controlling the engine, the first rotary electric machine and the second rotary electric machine. 7. A hybrid vehicle according to claim 6, wherein the driving device further comprises: a remaining battery level detector for detecting a remaining charge level of the battery to output the detected level to the controller, wherein the controller includes a regeneration determination section for causing the second rotary electric machine to perform power regeneration through torque generated by the driving wheel as the vehicle runs and for determining whether or not the electricity regenerated by the second rotary electric machine can be stored in the battery based on the remaining charge level of the battery input from the remaining battery level detector, and when the brake determination section determines that the vehicle is braking and the regeneration determination section determines that the battery can be charged, performs the pressure reducing operation via the pressure reduction device and causes the second rotary electric machine to perform regeneration through rotation of the driving wheel as an electric generator, and when the brake determination section determines that the vehicle is braking and the regeneration determination section determines that the battery cannot be charged, stops the pressure reducing operation of the pressure reduction device and rotates the engine through rotation of the driving wheel. 8. A hybrid vehicle comprising: an engine for producing power; a first rotary electric machine configured to operate as at least one of an electric generator and an electric motor; a power distribution device configured to distribute the power produced by the engine to the first rotary electric machine and to a driving wheel; a second rotary electric machine configured to operate as at least one of an electric motor and an electric generator to produce power to drive the driving wheel; a battery that stores the electricity generated by the first rotary electric machine and supplies electricity to at least one of the second rotary electric machine and the first rotary electric machine; a pressure reduction device provided in the engine for reducing a compression pressure inside a cylinder of the engine created while cranking the engine; an accelerator opening detection section for detecting an accelerator opening; a vehicle speed detection section for detecting a speed of the vehicle; a brake detection section for detecting an amount of brake operation by a user; a charge amount detection section for detecting an amount of electric charge stored in the battery; and a controller for controlling the engine, the first rotary electric machine and the second rotary electric machine and for controlling the pressure reduction device to reduce the compression pressure inside the engine cylinder when stopping the engine, wherein the controller has plural operation modes in which the first rotary electric machine, the second rotary electric machine and the engine are controlled based on the accelerator opening, vehicle speed, brake operation amount and charge amount input when braking the vehicle, the plural operation modes including: a vehicle stationary mode in which the engine experiences a misfire and comes to a complete stop, a first regenerative braking mode effected when the vehicle speed is not lower than a specific speed, in which the pressure reduction device is driven, the engine experiences a misfire and is cranked, and the second rotary electric machine performs regeneration through torque of the driving wheel via the power distribution device to charge the storage battery, a second regenerative braking mode effected when the vehicle speed is lower than the specific speed, in which the pressure reduction device is stopped, the engine experiences a misfire and is cranked, and the second rotary electric machine performs regeneration through torque of the driving wheel via the power distribution device to charge the battery, and an engine braking mode effected when the storage battery is charged up to its full capacity, in which the pressure reduction device is stopped, the engine experiences a misfire and is cranked, and the engine rotates through torque of the driving wheel via the power distribution device. 9. A hybrid vehicle, comprising: an engine for producing power; a first rotary electric machine configured to operate as at least one of an electric generator and an electric motor; a power distribution device configured to distribute the power produced by the engine to the first rotary electric machine and to a driving wheel; a second rotary electric machine configured to operate as at least one of an electric motor and an electric generator to produce power to drive the driving wheel; a battery that stores electricity generated by the first rotary electric machine and supplies electricity to at least one of the second rotary electric machine and the first rotary electric machine; and a driving device including: a pressure reduction device provided in the engine for reducing a compression pressure inside a cylinder of the engine created while cranking the engine; a controller configured to control the pressure reduction device so as to reduce the compression pressure inside the engine cylinder when stopping the engine; an accelerator opening detector coupled with an accelerator and communicating an accelerator opening to the controller; and a vehicle speed detector communicating a detected vehicle speed to the controller, wherein the controller includes an engine state determination section for determining whether or not to stop the engine based on the input accelerator opening and vehicle speed, and is configured to stop the engine based on the determination to stop the engine by the engine state determination section. 10. A hybrid vehicle, comprising: an engine for producing power; a first rotary electric machine configured to operate as at least one of an electric generator and an electric motor; a power distribution device configured to distribute the power produced by the engine to the first rotary electric machine and to a driving wheel; a second rotary electric machine configured to operate as at least one of an electric motor and an electric generator to produce power to drive the driving wheel; a battery that stores electricity generated by the first rotary electric machine and supplies electricity to at least one of the second rotary electric machine and the first rotary electric machine; and a driving device including: a pressure reduction device provided in the engine for reducing a compression pressure inside a cylinder of the engine created while cranking the engine; a controller configured to control the pressure reduction device so as to reduce the compression pressure inside the engine cylinder when stopping the engine; and a brake detector for detecting an amount of brake operation by a user, wherein the controller includes a brake determination section for determining whether or not the vehicle is braking based on the input accelerator opening, vehicle speed and brake operation amount when the engine state determination section determines not to stop the engine, and when the brake determination section determines that the vehicle is braking, and wherein the controller is configured to cause the second rotary electric machine or the engine to through torque of the driving wheel by controlling the engine, the first rotary electric machine and the second rotary electric machine. 11. A hybrid vehicle, comprising: an engine for producing power; a first rotary electric machine configured to operate as at least one of an electric generator and an electric motor; a power distribution device configured to distribute the power produced by the engine to the first rotary electric machine and to a driving wheel; a second rotary electric machine configured to operate as at least one of an electric motor and an electric generator to produce power to drive the driving wheel; a battery that stores electricity generated by the first rotary electric machine and supplies electricity to at least one of the second rotary electric machine and the first rotary electric machine; and a driving device including: a pressure reduction device provided in the engine for reducing a compression pressure inside a cylinder of the engine created while cranking the engine; a controller configured to control the pressure reduction device so as to reduce the compression pressure inside the engine cylinder when stopping the engine; and a remaining battery level detector for detecting a remaining charge level of the battery to output the detected level to the controller, wherein the controller includes a regeneration determination section for causing the second rotary electric machine to perform power regeneration through torque generated by the driving wheel as the vehicle runs and for determining whether or not the electricity regenerated by the second rotary electric machine can be stored in the battery based on the remaining charge level of the battery input from the remaining battery level detector, and when the brake determination section determines that the vehicle is braking and the regeneration determination section determines that the battery can be charged, performs the pressure reducing operation via the pressure reduction device and causes the second rotary electric machine to perform regeneration through rotation of the driving wheel as an electric generator, and when the brake determination section determines that the vehicle is braking and the regeneration determination section determines that the battery cannot be charged, stops the pressure reducing operation of the pressure reduction device and rotates the engine through rotation of the driving wheel.
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