Control system for hybrid vehicles

Abstract

To provide a hybrid vehicle control device that mitigates a reduction in acceleration performance when starting an engine.SOLUTION: A control device is for a hybrid vehicle comprising an engine, a drive wheel, a motor arranged in a power transmission path, a torque converter arranged in the power transmission path, a transmission capable of cutting off power transmission between the torque converter and the motor, a starter which performs motoring of the torque converter together with the engine, and an oil pump pumping oil to the torque converter. The control device has: a supply control device which starts a supply process to supply the oil to the torque converter by driving the starter and the oil pump after a lapse of predetermined time since when the transmission cuts off power transmission and the engine is stopped; and a measuring section which measures the predetermined time to make the predetermined time when a hybrid vehicle is stopped shorter than the predetermined time when the hybrid vehicle is in motion using the motor.SELECTED DRAWING: Figure 4

Claims

1. A control device for a hybrid vehicle comprising an engine, drive wheels, a motor provided in the power transmission path between the engine and the drive wheels, a torque converter provided in the power transmission path between the engine and the motor, a transmission capable of interrupting power transmission between the torque converter and the motor, a starter that motorizes the torque converter together with the engine, and an oil pump that pressurizes oil to the torque converter, A supply control unit, which starts a supply process to supply oil into the torque converter by driving the starter and the oil pump after a predetermined time has elapsed since the transmission has shut off the power transmission and the engine has stopped, The hybrid vehicle includes a measuring unit that measures the predetermined time such that the predetermined time when the vehicle is running using the motor is shorter than the predetermined time when the vehicle is stationary, The measurement unit shortens the predetermined time as the vibration of the hybrid vehicle increases. The oil pump is a mechanical oil pump that rotates integrally with the torque converter. In the supply process, the starter is driven, causing the oil pump to rotate together with the torque converter, and oil is supplied from the oil pump into the rotating torque converter, in a control device for a hybrid vehicle.

2. The supply control unit, when the timer value counted from the state in which the transmission has cut off the power transmission and the engine has stopped has reached a predetermined value or higher, deems that the predetermined time has elapsed and starts the supply process. The control device for a hybrid vehicle according to claim 1, wherein the measuring unit measures the predetermined time by adjusting at least one of the timer value and the predetermined value.

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