Patent ID: 7316283

Claim:
An automatic transmission controller for a hybrid vehicle, the hybrid vehicle being a four-wheel drive vehicle and comprising an engine and a generator motor on a front wheel side of the hybrid vehicle and a traction motor on a rear wheel side of the hybrid vehicle, the automatic transmission controller for a hybrid vehicle comprising: an automatic transmission which transmits a driving force from the engine to an output shaft of the hybrid vehicle, and is provided with a speed-shifting clutch which disconnects and connects the driving force from the engine and the generator motor; and an oil pump for supplying a speed-shifting clutch of the automatic transmission with pre-pressure to eliminate play of the speed-shifting clutch, when the hybrid vehicle is driven by a driving force from the traction motor, wherein in an EV traveling mode where the hybrid vehicle is driven only by the driving force from the traction motor, the oil pump is activated to supply the speed-shifting clutch with a pre-pressure for eliminating a play of the speed-shifting clutch.