The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 2019
Filed:
Dec. 02, 2016
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Masato Igarashi, Tokyo, JP;
Sho Yoshida, Tokyo, JP;
SUBARU CORPORATION, Tokyo, JP;
Abstract
Abnormality detection device for a hydraulic circuit with oil pump capable of increasing pressure of oil sucked through a suction port and discharging the oil through discharge ports; a switching unit switching between fully and partially discharged states; a pressure regulation unit regulating oil pressure; and a hydraulic pressure detection unit that detects the oil pressure includes: a storage unit that stores a maximum discharge pressure in the partially discharged state; a switching control unit that switches to either one of the discharged states; a pressure regulation control unit that sets a target pressure higher than the maximum discharge pressure in the partially discharged state, and performs pressure regulation control to achieve the target pressure; and a determination unit that determines whether the switching unit has a fixation abnormality in one of the discharged states by comparing hydraulic pressure with maximum discharge pressure in the partially discharged state.