Oil pump control device for automatic transmission and control method of the same

DETAILED DESCRIPTION The invention thus provides an oil pump control device for an automatic transmission which offers an adequate solution to the problems caused in the control device for the electric oil pump according to the related art and which ensures an optimal hydraulic pressure output from the electric oil pump from the standpoint of operating a friction coupling element and a change-gear mechanism.
In order to achieve the objective stated above, an oil pump control device for an automatic transmission according to one aspect of the invention comprises an electric oil pump that is electrically driven to supply the automatic transmission with a hydraulic pressure, and a controller that updates the hydraulic pressure generated by the electric oil pump on the basis of kinetic characteristics of a torque transmission system during a start of an engine that is stopped automatically upon fulfillment of one of a predetermined number of running conditions of a vehicle and optimizing a hydraulic pressure supplied to the automatic transmission during a restart of the engine.
A control method of the oil pump control device comprises the steps of setting a driving pattern of a motor for an electric oil pump that supplies a hydraulic pressure to an automatic transmission, measuring an input speed of the automatic transmission, and correcting the driving pattern on the basis of the input speed and a hydraulic pressure in the electric oil pump.