Invention Grant
- Patent Title: Control apparatus and control method for vehicle electric oil pump
- Patent Title (中): 车用电动油泵控制装置及控制方法
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Application No.: US14212259Application Date: 2014-03-14
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Publication No.: US09228655B2Publication Date: 2016-01-05
- Inventor: Masahiko Wakairo , Naoki Okamoto
- Applicant: Hitachi Automotive Systems, Ltd.
- Applicant Address: JP Hitachinaka-shi
- Assignee: Hitachi Automotive Systems, Ltd.
- Current Assignee: Hitachi Automotive Systems, Ltd.
- Current Assignee Address: JP Hitachinaka-shi
- Agency: Crowell & Moring LLP
- Priority: JP2013-147476 20130716
- Main IPC: F16H61/00
- IPC: F16H61/00

Abstract:
A control apparatus and a control method that controls an electric oil pump that supplies oil to a power transmission device transmitting a drive force to an axle. The control apparatus changes a PWM frequency in a PWM control of the electric oil pump to a lower frequency, when a vehicle is in a pulled state, when a vehicle speed is high, when a power source is operated at a high rotational speed, when a discharge amount from the electric oil pump is large, or when a noise in a vehicle interior is large. Thus, a drive noise of the pump can be reduced, or the amount of heat generated in the pump drive circuit and power consumption can be reduced.
Public/Granted literature
- US20150025739A1 Control Apparatus and Control Method for Vehicle Electric Oil Pump Public/Granted day:2015-01-22
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