Electric pump device
AssigneeJtekt Corporation
InventorsFukami Imai, Kengo Uda
Life of this patent
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Abstract
There is provided an electric pump device that can suppress the generation of vibration or noise. When reducing hydraulic pressure supplied from an oil pump with the increase of hydraulic pressure supplied from a main pump driven by an engine, an electric oil pump ECU performs a pressure reducing control gradually reducing the hydraulic pressure.
Claims5
An electric pump device that includes an oil pump generating hydraulic pressure, a motor driving the oil pump, and a controller controlling an operation of the oil pump through a supply of drive power to the motor, and is provided in a hydraulic circuit supplying operating oil to a hydraulic operating device together with another oil pump,
- wherein the controller operates the oil pump to complement a supply of hydraulic pressure to the hydraulic operating device when the supply of hydraulic pressure to the hydraulic operating device performed by the another oil pump is stopped, and
- the controller performs a pressure reducing control gradually reducing hydraulic pressure supplied from the oil pump when the supply of hydraulic pressure to the hydraulic operating device is switched to the another oil pump from the oil pump.
Dependencies are inferred from the claim text.