HYBRID ELECTRIC VEHICLE DRIVE APPARATUS

摘要

A hybrid electric vehicle drive apparatus has a setting portion for setting a limit value of a driving torque that a motor outputs when driving a hybrid electric vehicle by the power of the motor only, based on a maximum torque that the motor enables to output and a starling torque used to start an internal combustion engine by the motor. The setting portion sets the limit value to a first value and sets the limit value to a second value which is greater than the first value when a vehicle speed of the vehicle does not increase even though an accelerator pedal position degree increases while the vehicle is being driven only by the motor.

主权项

1. A hybrid electric vehicle drive apparatus including an internal combustion engine, a transmission having two or more input shafts, an electric motor which is connected to either of the input shafts of the transmission so as to transmit power thereto, and an engaging and disengaging portion which engages and disengages the internal combustion engine and the transmission, and configured to be driven by power of at least one of the internal combustion engine and the electric motor, comprising:
a maximum torque deriving portion for deriving a maximum torque that the electric motor enables to output; a starting torque deriving portion for deriving a starting torque for use in starting the internal combustion engine by the electric motor; a torque limit value setting portion for setting a limit value of a driving torque that the electric motor outputs when the vehicle drives with power of the electric motor only, based on the maximum torque and the starting torque; a vehicle speed acquiring portion for acquiring a speed of the vehicle; and an accelerator pedal position degree acquiring portion for acquiring a position degree of an accelerator pedal, wherein the torque limit value setting portion sets the limit value of the driving torque to a first driving torque value and sets the limit value of the driving torque to a second driving torque value which is greater than the first driving torque value when the speed does not increase even though the accelerator pedal position degree increases while the vehicle is being driven only by the electric motor.