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. 25, 2021
Filed:
Nov. 08, 2019
Mazda Motor Corporation, Hiroshima, JP;
Satoshi Imamura, Hiroshima, JP;
Masaki Fukuma, Hiroshima, JP;
Yasushi Nakahara, Higashihiroshima, JP;
Atsushi Inoue, Aki-gun, JP;
Kota Matsumoto, Aki-gun, JP;
Michiharu Kawano, Hiroshima, JP;
Yuya Honda, Hiroshima, JP;
Futa Nishi, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A combustion chamber structure for an engine includes a combustion chamber where SI combustion by spark ignition and CI combustion by self-ignition are conducted. A crown surface includes a cavity recessed to have a bowl-shape; a pair of first raised portions having a mound-shape along a pent roof shape; and a second raised portion provided to protrude at a position orthogonal to a ridge extending direction of the pair of first raised portions. With a height of the first raised portion relative to a height position of a deepest portion of the cavity being represented as H1 and a height of the second raised portion being represented as H2, H1/H2 as a ratio of the height H1 of the first raised portion to the height H2 of the second raised portion is set to be in a range of 1.92 or more and 2.75 or less.