Patent ID: 6991581

Claim:
A control system for a hybrid vehicle, which has; a first prime mover ( 1 ) and a second prime mover ( 7 ) for transmitting a power to a wheel ( 31 ); a power distributor ( 10 ) for distributing the power of said first prime mover ( 1 ) to the wheel ( 31 ) and to a rotary device ( 6 ); a transmission ( 19 ) arranged on a power transmission route from said second prime mover ( 7 ) to the wheel ( 31 ); and a gear ratio controller (SL 1 , SL 2 ) for controlling a gear ratio of the transmission ( 19 ), comprising: a sub-controller ( 88 , 120 ) for controlling a status of said transmission ( 19 ) to enable suppression of decline in a driving performance of the vehicle, even when the function of said gear ratio controller (SL 1 , SL 2 ) declines.