STICKING DETECTION DEVICE OF OIL PUMP

摘要

To provide a sticking detection device of an oil pump capable of preventing overshoot of an oil pressure immediately after termination of sticking determination.SOLUTION: A target oil pressure setting portion 150b sets a value higher than a maximum pressure in a partial discharge state, as a target oil pressure for diagnosis to determine whether an oil pump 10 sticks or not. A discharge state switching portion 150a executes control to switch the discharge state of the oil pump 10 to the partial discharge state. A pressure regulation portion 150c temporarily stops an accumulation operation of integration term for regulating a control value according to time integration of deviation between the target oil pressure for diagnosis and the oil pressure, when the control for switching the discharge state of the oil pump 10 to the partial discharge state is executed in regulating the oil pressure to be coincident with the target oil pressure for diagnosis. The sticking determination portion 150d determines whether the oil pump 10 sticks in a full discharge state or not on the basis of a relationship between an oil pressure after performing the control to switch the discharge state to the partial discharge state and a maximum pressure of the partial discharge state.SELECTED DRAWING: Figure 1