Patent ID: 6602164
Filing Date: 2003-08-05
Classification: B60K,B60L,B60W,F16H,Y02T,Y10S,Y10T

Abstract:
A torque control system for a hybrid vehicle, comprising:an engine and an electric motor serving as drive power sources of the vehicle; a clutch connected to an output side of said engine; a transmission connected to an output side of said clutch; engine torque control means for controlling a torque of said engine; shift control means for performing a gear shift operation by selectively engaging and disengaging said clutch and selectively shifting gears of said transmission while the engine torque is being temporarily varied by said engine torque control means; accelerator control input detecting means for detecting a depression amount of an accelerator pedal by a driver; depression amount corresponding engine torque estimating means for estimating a depression amount corresponding engine torque that corresponds to the detected depression amount; actual engine torque estimating means for estimating an actual engine torque; and motor torque control means for controlling torque of said motor, said motor torque control means including, first control means for controlling a torque of said motor based on the estimated depression amount corresponding engine torque while said clutch is in a totally disengaged state, and second torque control means for increasing the torque of said motor based on a difference between the estimated depression amount corresponding engine torque and the estimated actual engine torque as the estimated actual engine torque is decreased prior to disengagement of said clutch for performing the gear shift operation, and third torque control means for decreasing the torque of said motor based on the difference as the estimated actual engine torque is increased prior to engagement of said clutch after performing the gear shift operation.