Engine starting system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYasuhiro Oshiumi
Life of this patent
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Abstract
An engine starting system for hybrid vehicle is provided. The engine starting system is applied to a hybrid vehicle in which a friction clutch is disposed between an engine and a power distribution device. In order to reduce gear noise and vibrations, a second motor establishes a cancel torque to cancel a reaction torque acting on an axle when starting the engine. The engine starting system is configured to increase the torque of the second motor in a direction of a drive torque rotating the axle, when starting the engine while bringing the friction clutch into engagement in a slipping manner.
Claims5
An engine starting system for a hybrid vehicle, the engine starting system comprising:
- an engine;
- a first motor and a second motor individually having a generating function;
- a power distribution device configured to perform a differential action among a first rotary element connected to the first motor, a second rotary element connected to the engine through a friction clutch disposed between the engine and the power distribution device, and a third rotary element functioning as an output member;
- wherein a torque of the second motor is delivered to drive wheels in addition to a torque of the third rotary member;
- wherein the engine starting system is configured to establish a cancel torque by the second motor to cancel a reaction torque acting on an axle when starting the engine by the first motor;
- and
- wherein the engine starting system is configured to increase the torque of the second motor in a direction of a drive torque rotating the axle, when starting the engine while bringing the friction clutch into engagement in a slipping manner.
Dependencies are inferred from the claim text.