Title:
A control device and the control method of an electric oil pump
Document Type and Number:
Japanese Patent JP6277022
Kind Code:
B2
Abstract:
An electric oil pump (ELOP) provided in parallel to a mechanical oil pump driven by an engine supplies oil to a clutch of a transmission. The ELOP is rotated in advance of a request to operate the ELOP at a targeted relatively-low first preoperation rotational speed. When an actual rotational speed matches the first preoperation rotational speed and an actual current matches a threshold, the ELOP is rotated at a targeted relatively-high second preoperation rotational speed. At least when an actual rotational speed matches a second predetermined rotational speed not higher than the second preoperation rotational speed, it is determined that preoperation is completed. If the number of restarts during the preoperation as one operation history of the ELOP reaches or exceeds the predetermined number of times, the current supply to the ELOP is interrupted to limit the restart, thereby reducing the number of repeated restarts of the ELOP.
Inventors:
Masago Miyamoto
Application Number:
JP2014051218A
Publication Date:
February 07, 2018
Filing Date:
March 14, 2014
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
F16H61/00
Domestic Patent References:
| JP2013170624A | ||||
| JP2013067326A | ||||
| JP2013185497A | ||||
| JP2013068267A | ||||
| JP2012057645A | ||||
| JP10332023A | ||||
| JP2008008282A |
Attorney, Agent or Firm:
Moriaki Ogawa
Haruyuki Nishiyama
Mitsuji Sekiya
Tomijio Sasashima
Haruyuki Nishiyama
Mitsuji Sekiya
Tomijio Sasashima
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