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:
Aug. 20, 2013
Filed:
Feb. 22, 2011
Shigenao Maruyama, Miyagi, JP;
Atsuki Komiya, Miyagi, JP;
Shuichi Moriya, Miyagi, JP;
Morimasa Nagata, Saitama, JP;
Seiji Kosaka, Saitama, JP;
Yasuhiro Kawamura, Saitama, JP;
Junya Negishi, Saitama, JP;
Yoshita Tsukamoto, Saitama, JP;
Shigenao Maruyama, Miyagi, JP;
Atsuki Komiya, Miyagi, JP;
Shuichi Moriya, Miyagi, JP;
Morimasa Nagata, Saitama, JP;
Seiji Kosaka, Saitama, JP;
Yasuhiro Kawamura, Saitama, JP;
Junya Negishi, Saitama, JP;
Yoshita Tsukamoto, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a piston cooling device wherein the cooling efficiency of a piston is improved by oil injected from an oil jet and supplied to a cooling passage provided in the piston, and the amount of cooling oil is reduced when an internal combustion engine is operated at maximum output. The piston cooling device is provided with a piston for an internal combustion engine, in which a circumferential passage and a cooling passage having an inlet passage and an outlet passage are provided, and an oil jet for injecting oil from an injection port to the inlet passage. The oil jet injects oil at every stroke of the piston so that a two-phase plug flow composed of gas and oil is formed in the cooling passage at least when an internal combustion engine is operated at maximum output.