Engine stopping system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYasuhiro OSHIUMI
Life of this patent
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Abstract
An engine stopping system for reducing electric consumption by interrupting power supply to a motor during disengagement of a clutch is provided. The engine stopping system is applied to a vehicle in which the clutch is interposed between an engine and a power distribution device. The engine stopping system is configured to interrupt power supply to the motor while bringing the clutch into disengagement, when an input speed Nin falls below a threshold value α, under conditions that the engine does not generate power during engagement of the clutch, and that the motor generates electricity utilizing an inertia torque of the engine while controlling an output torque of the motor to lower the engine speed.
Claims6
An engine stopping system that is applied to a hybrid vehicle (Ve) comprising:
- an engine;
- a motor having generating function;
- a clutch that selectively connects and disconnects the engine to/from the power distribution device;
- wherein the power distribution device performs a differential action among a first rotary element joined to the motor to be rotated integrally therewith, a second rotary element joined to the engine through the clutch, and a third rotary element functioning as an output element to deliver torque to drive wheels;
- and
- wherein the engine stopping system is configured to vary an engine speed by controlling a torque of the motor during engagement of the clutch;
- and
- wherein the engine stopping system is configured to interrupt power supply to the motor while bringing the clutch into disengagement, when the engine speed falls below a predetermined threshold value greater than zero, under conditions that the engine does not generate power during engagement of the clutch, and that the motor generates electricity utilizing an inertia torque of the engine while controlling an output torque of the motor in a manner such that the engine speed is lowered.
Dependencies are inferred from the claim text.