Hybrid vehicle drive system including controllable device between engine and electric motor and vehicle drive wheels, and apparatus for controlling the device depending upon selected operation mode of the system

摘要

A hybrid drive system for a motor vehicle, wherein a controllable device such as an automatic transmission or a center differential device is disposed between drive wheels of the vehicle and a drive power source consisting of an engine operated by combustion of a fuel, and an electric motor operated with an electric energy, and the engine and/or the electric motor is/are operated for driving the motor vehicle in different running modes. The controllable device is controlled by a control device on the basis of an input torque received by the controllable device. The control device is adapted to estimate the input torque of depending upon a currently selected one of the running modes, or effect learning control of the controllable device in different manners corresponding to the different running modes.