Engine idle stop control system for vehicles
First Claim
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1. An engine idle stop control system for a vehicle, comprising:
- an engine, a motor/generator connected to the engine, an automatic transmission which transmits a rotation of the engine to a drive wheel, a sensor which detects a vehicle stationary state, a sensor which detects an accelerator pedal depression amount, and a microprocessor which is programmed to;
stop the engine according to conditions when the vehicle has been stationary, restart the engine by starting the motor/generator when a request to restart the engine which has stopped is determined, and control absorption of the engine torque by the motor/generator so that a vehicle starting torque according to the same accelerator pedal depression is effectively the same torque for the vehicle starting from an engine stop state by restarting the engine as for the vehicle starting from an engine idle rotation state.
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Abstract
An engine 1 is stopped according to conditions when a vehicle has stopped, and the engine 1 is started by starting a motor/generator 2 when a request to restart the engine 1 which has stopped, is determined. Engine torque is absorbed by the motor/generator 2 so that that the starting torque according to an accelerator pedal depression after restart, is effectively the same torque for starting from the engine stop state as for starting from the engine idle state. In this way, the same starting performance is obtained when the vehicle starts from the engine stop state as when the vehicle starts from the engine idle rotation state.
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Citations
8 Claims
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1. An engine idle stop control system for a vehicle, comprising:
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an engine, a motor/generator connected to the engine, an automatic transmission which transmits a rotation of the engine to a drive wheel, a sensor which detects a vehicle stationary state, a sensor which detects an accelerator pedal depression amount, and a microprocessor which is programmed to;
stop the engine according to conditions when the vehicle has been stationary, restart the engine by starting the motor/generator when a request to restart the engine which has stopped is determined, and control absorption of the engine torque by the motor/generator so that a vehicle starting torque according to the same accelerator pedal depression is effectively the same torque for the vehicle starting from an engine stop state by restarting the engine as for the vehicle starting from an engine idle rotation state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An engine idle stop control system for a vehicle, comprising:
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an engine, a motor/generator connected to the engine, an automatic transmission which transmits a rotation of the engine to a drive wheel, means for detecting a vehicle stationary state, means for detecting an accelerator pedal depression amount, means for stopping the engine according to conditions when the vehicle has been stationary, means for restarting the engine by starting the motor/generator when a request to restart the engine which has stopped, is determined, and means for controlling to make the motor/generator absorb engine torque so that the vehicle starting torque according to the same accelerator pedal depression is effectively the same torque for the vehicle starting from an engine stop state by restarting the engine as for the vehicle starting from an engine idle rotation state.
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Specification