Patent ID: 8727940

Claim:
A power transmission control device for a vehicle which includes an internal combustion engine and an electric motor as power sources, comprising: a manual transmission which has an input shaft for receiving power from an output shaft of the internal combustion engine and an output shaft for outputting power to drive wheels of the vehicle, which does not have a torque converter, and whose gear state is selected in accordance with a shift position of a shift operation member operated by a driver, an output shaft of the electric motor being connected to the output shaft of the manual transmission; a friction clutch which is interposed between the output shaft of the internal combustion engine and the input shaft of the manual transmission and whose engagement state changes in accordance with an operation quantity of a clutch operation member operated by the driver; first detection means which detects an operation quantity of an acceleration operation member operated by the driver in order to accelerate the vehicle; second detection means which detects operation of the clutch operation member; and control means which controls internal combustion engine torque which is torque output from the output shaft of the internal combustion engine and motor torque which is torque output from the output shaft of the electric motor, wherein the control means adjusts the motor torque to a base motor torque when it is determined that a power transmission system is established between the output shaft of the internal combustion engine and the output shaft of the manual transmission, the base motor torque having a magnitude determined in accordance with the operation quantity of the acceleration operation member, serving as drive torque acting in a direction for accelerating the vehicle when the operation quantity of the acceleration operation member is equal to or greater than a predetermined quantity, and serving as regeneration torque acting in a direction for decelerating the vehicle when the operation quantity of the acceleration operation member is less than the predetermined quantity; and the control means executes a regeneration torque reduction control in which the magnitude of the motor torque serving as the regeneration torque is decreased from the magnitude of the base motor torque to a predetermined minute value which is greater than zero and then the magnitude of the motor torque is maintained at the minute value, upon determination that the motor torque is adjusted to the base motor torque serving as the regeneration torque and the state of the power transmission control device has changed from a state in which a power transmission system is established between the output shaft of the internal combustion engine and the output shaft of the manual transmission to a state in which the power transmission system is not established therebetween.