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:
Oct. 20, 2015
Filed:
Mar. 18, 2013
Yamada Manufacturing Co., Ltd., Kiryu-shi, Gunma, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Yasunori Ono, Isesaki, JP;
Junichi Miyajima, Isesaki, JP;
Noriyuki Kawamata, Wako, JP;
Hayato Maehara, Wako, JP;
Eisuke Kajihara, Wako, JP;
Kazuhiro Takeuchi, Wako, JP;
Norihiko Gogami, Wako, JP;
Satoshi Ino, Wako, JP;
YAMADA MANUFACTURING CO., LTD., Kiryu-Shi, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
The engine with a variable flow rate oil pump includes a subsidiary relief passage that extends from an oil passage-switching valve to a subsidiary oil pump, a main relief passage that extends from the oil passage-switching valve to the main oil pump separately from the subsidiary relief passage, and a check valve that is provided in the subsidiary discharge passage and cuts off the flow of oil from the main discharge passage side to the oil passage-switching valve side. The oil passage-switching valve has a main pressure-adjusting chamber for the main oil pump, a subsidiary pressure-adjusting chamber of for the subsidiary oil pump, and a spool valve that performs partitioning between the main pressure-adjusting chamber and the subsidiary pressure-adjusting chamber.