Patent ID: 7617025
Filing Date: 2009-11-10
Classification: B60W

Abstract:
1. An electric oil pump control system for a hybrid vehicle, wherein: the hybrid vehicle has: an engine and a first electric motor as driving sources of the hybrid vehicle; a hydraulic automatic transmission connected between the engine and drive wheels of the hybrid vehicle; an electric oil pump for generating an oil pressure necessary for performing gear change of the hydraulic automatic transmission, wherein the hybrid vehicle can run by at least one of the engine and the first electric motor in accordance with a driving state of the vehicle; the control system has a control device for driving the electric oil pump so as to generate an oil pressure supplied to the hydraulic automatic transmission, wherein the control device drives the electric oil pump when the hybrid vehicle runs with the engine and the electric oil pump which are stopped, in accordance with a predetermined condition by which it is determined that the electric oil pump should be driven; and it is determined that the electric oil pump should be driven when at least one of the following conditions is satisfied as the predetermined condition: driving force by the first electric motor exceeds a predetermined value; power output from the first electric motor exceeds a predetermined value; a rate of temporal change in a degree of depression of an accelerator pedal of the vehicle exceeds a predetermined value; and the degree of depression of the accelerator pedal exceeds a predetermined value.