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. 23, 2012
Filed:
Feb. 27, 2009
Hiroshi Kawamura, Okazaki, JP;
Shunji Mamiya, Iwata, JP;
Noboru Nowatari, Iwata, JP;
Hitoshi Uema, Iwata, JP;
Hiroshi Kawamura, Okazaki, JP;
Shunji Mamiya, Iwata, JP;
Noboru Nowatari, Iwata, JP;
Hitoshi Uema, Iwata, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Iwata-shi, JP;
Abstract
An engine lubrication system for a multi-cylinder engine, comprising: plurality of crank chambers that are partitioned by crankshaft bearing portions of the engine; pumps that take out oil from a lower portion of the engine; oil collection passages that are respectively provided for the crank chambers, a designated number of the oil collection passages being merged and connected to at least one of suction ports of the pumps; an oil storage section that temporarily stores the oil taken out from the lower portion of the engine; a lubrication part that supplies the oil in the oil storage section to a portion to be lubricated of the engine; and a pressure variation suppression section that is provided between the suction ports of the pumps and the designated number of the crank chambers to be merged, the pressure variation suppression section suppressing pressure variations in the crank chambers.