Patent ID: 6549839
Filing Date: 2003-04-15
Classification: B60W,F02D,F16H,Y10T

Abstract:
A vehicle drive system comprising:an engine; an automatic transmission connected to the engine; a sensor which detects a running condition of the vehicle; a sensor which detects an operational condition of the transmission; and a controller functioning to: calculate a target drive force based on the running condition of the vehicle; calculate a first value based on the state of the transmission; set the first value as a speed ratio for calculating a target engine torque during forward vehicle operation; set a second value calculated by correcting the first value to a larger value as the speed ratio for calculating the target engine torque during reverse vehicle running; calculate the target engine torque by dividing the target drive force by the speed ratio for calculating the target engine torque; and control the engine so that the engine torque coincides with the target engine torque.