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:
Feb. 03, 2004
Filed:
Mar. 27, 2002
Fumihiko Saito, Aki-gun, JP;
Noriyuki Ohta, Aki-gun, JP;
Hiroyuki Yamashita, Aki-gun, JP;
Masashi Marubara, Aki-gun, JP;
Masatoshi Seto, Aki-gun, JP;
Hiroyuki Yoshida, Aki-gun, JP;
Takehiko Yasuoka, Tokyo, JP;
Masakazu Matsumoto, Kitakyushu, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A fuel spray and a tumble collide with each other from approximately opposite directions in a cavity formed in a piston head so that a combustible mixture stays around a spark plug for an extended period of time. An upper opening of the cavity is elongated to both the left and right sides of a cylinder axis. The distance between a ceiling of the combustion chamber and a bottom surface of the cavity is smaller on the right side of the cylinder axis than on the left side thereof and largest at least at a point where the cylinder axis crosses the bottom surface of the cavity, and a portion of the cavity to the left of the cylinder axis has a larger volumetric capacity than a portion of the cavity to the right of the cylinder axis, whereby a strong tumble is maintained up to a fuel injection point.