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:
Jan. 26, 2010
Filed:
Dec. 31, 2008
Toshiaki Nishimoto, Hiroshima, JP;
Masahisa Yamakawa, Hiroshima, JP;
Takashi Youso, Hiroshima, JP;
Tatsuya Fujikawa, Hiroshima, JP;
Toshiaki Nishimoto, Hiroshima, JP;
Masahisa Yamakawa, Hiroshima, JP;
Takashi Youso, Hiroshima, JP;
Tatsuya Fujikawa, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
Disclosed is an internal combustion engine, which has a geometric compression ratio of 13.0 or greater, and a combustion chamber () configured to satisfy a condition of S/V≦0.12 (mm) when a radius r of a hypothetical sphere (IS) with its center at an ignition point (CP) of a spark plug () is set to satisfy a condition of V=0.15×V, where: S (mm) is an area of an interference surface between the hypothetical sphere (IS) and an inner wall of the combustion chamber () in a state when a piston () is at its top dead center position; V(mm) is a volume of the combustion chamberin the state when the piston () is at the top dead center position; and V(mm) is a volume of a non-interference part of the hypothetical sphere (IS) which is free of interference with the inner wall of the combustion chamber () when the piston () is at the top dead center position. The internal combustion engine of the present invention can more reliably improve fuel economy.