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. 02, 2014
Filed:
Oct. 19, 2010
Tsuyoshi Goto, Hiroshima, JP;
Hidetoshi Kudou, Higashihiroshima, JP;
Yasushi Nakahara, Higashihiroshima, JP;
Masami Nishida, Hiroshima, JP;
Tsuyoshi Goto, Hiroshima, JP;
Hidetoshi Kudou, Higashihiroshima, JP;
Yasushi Nakahara, Higashihiroshima, JP;
Masami Nishida, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
Provided is a spark-ignition internal combustion engine capable of ensuring engine output power while setting a geometric compression ratio of an engine body to a high value. In the spark-ignition internal combustion engine, each of a clearance between a top surface () of a piston () located at a top dead center position and a lower surface () of each of two intake valves () in a full-closed state, and a clearance between the top surface () of the piston () located at the top dead center position and a lower surface () of each of two exhaust valves () in a full-closed state, is set to 5 mm or more, and a stroke length S of the piston () is set to satisfy the following relation: S≦0.977×B+18.2, where B is a bore diameter of a cylinder.