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:
May. 07, 2019
Filed:
Sep. 23, 2016
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Denso Corporation, Kariya, Aichi, JP;
Takayuki Hikita, Hiroshima, JP;
Masahisa Yamakawa, Hiroshima, JP;
Tomonori Urushihara, Yokohama, JP;
Kazuhiro Nagatsu, Hiroshima, JP;
Tatsuya Fujikawa, Higashihiroshima, JP;
Takashi Youso, Hiroshima, JP;
Takaaki Nagano, Higashihiroshima, JP;
Yuuki Kawai, Kariya, JP;
Toshifumi Hayami, Kariya, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large.