초록 ▼

Hybrid drive system for a motor vehicle, wherein an automatic transmission disposed between a drive wheel of the vehicle and a drive power source including an engine and an electric motor is controlled by a shift control device, to change the speed ratio according to a normal shift pattern in a norm

Hybrid drive system for a motor vehicle, wherein an automatic transmission disposed between a drive wheel of the vehicle and a drive power source including an engine and an electric motor is controlled by a shift control device, to change the speed ratio according to a normal shift pattern in a normal vehicle operating state, and according to a special shift pattern in a predetermined special vehicle operating state such that the speed ratio according to the special shift pattern is smaller than the speed ratio according to the normal shift pattern, and wherein at least the engine is selected by a substitute drive power source selecting device, as the drive power source for driving the vehicle in the special operating state in which the automatic transmission is controlled according to the special shift pattern.

대표청구항 ▼

[ What is claimed is:] [1.] A hybrid drive system for a motor vehicle, comprising:an electric energy storage device for storing an electric energy;a drive power source including an electric motor operated with the electric energy supplied from said electric energy storage device, and an engine opera

[ What is claimed is:] [1.] A hybrid drive system for a motor vehicle, comprising:an electric energy storage device for storing an electric energy;a drive power source including an electric motor operated with the electric energy supplied from said electric energy storage device, and an engine operated by combustion of a fuel, at least one of said electric motor and said engine being operated for driving the motor vehicle in a plurality of operation modes;an automatic transmission which is disposed between said drive power source and a drive wheel of the motor vehicle and whose speed ratio is variable;shift control means for controlling said automatic transmission to change its speed ratio, according to a predetermined normal shift pattern determined drive the motor vehicle with an optimum drive force, in a normal operating state of the motor vehicle, and according to a predetermined special shift pattern in a predetermined special operating state of the motor vehicle such that the speed ratio of the automatic transmission controlled according to said special shift pattern is smaller than the speed ratio of the automatic transmission according to said normal shift pattern; andsubstitute drive power source selecting means for selecting at least said engine as the drive power source for driving the motor vehicle in said predetermined special operating state of the motor vehicle in which said automatic transmission is controlled according to said special shift pattern.