Electric oil pump control system in hybrid vehicle

摘要

An electric oil pump control system for a hybrid vehicle which has an engine (E) and a first electric motor (M1; M3) as driving sources; a hydraulic automatic transmission (T) connected between the engine (E) and drive wheels of the vehicle; an electric oil pump (22) for generating an oil pressure necessary for performing gear change of the transmission. The hybrid vehicle can run by at least one of the engine (E) and the first electric motor (M1; M3) in accordance with a driving state of the vehicle. The control system has a control device for driving the electric oil pump (22) so as to generate an oil pressure supplied to the hydraulic automatic transmission (T), wherein the control device drives the electric oil pump (22) when the hybrid vehicle runs with the engine (E) and the electric oil pump (22) which are stopped, in accordance with a predetermined condition by which it is determined that the electric oil pump (22) should be driven.