Patent ID: 8380405

Claim:
An engine automatic-stop control device with a failure judgment apparatus of an electric oil pump for a vehicle, the vehicle having a transmission which is controlled by hydraulic pressure from an engine-driven oil pump driven by an engine during engine operation, comprising: an electric oil pump which is driven by a dedicated motor and by working fluid of which, the transmission is kept in a power transmission starting state that is a state just before starting to transmit power, upon an engine automatic-stop, instead of the engine-driven oil pump; an engine automatic-stop controller which automatically stops the engine, upon a judgment of vehicle stop, when predetermined conditions are satisfied, and issues a pump test drive command to the dedicated motor before the engine stop by the engine automatic-stop control; an engine automatic-stop control permission judging means that judges whether the predetermined conditions which permit the engine automatic-stop control are satisfied or not, the engine automatic-stop control permission judging means having (a) a first engine automatic-stop control permission judgment section that judges the permission of the engine automatic-stop control by a judgment as to whether conditions by which an instant permission judgment can be possible, from among the predetermined conditions, are satisfied or not; and (b) a second engine automatic-stop control permission judgment section that judges the permission of the engine automatic-stop control by a judgment as to whether conditions which require a certain time for the permission judgment, from among the predetermined conditions, are satisfied or not; and an electric oil pump failure pre-judging means which judges failure of the electric oil pump by a judgment as to whether the electric oil pump is actually driven in response to the pump test drive command, and the electric oil pump failure pre-judging means executing the test drive of the electric oil pump, during the progress of the permission judgment of the engine automatic-stop control by the second engine automatic-stop control permission judgment section after the first engine automatic-stop control permission judgment section permits the engine automatic-stop control.