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:
Dec. 01, 2020
Filed:
Nov. 07, 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, and a pair of raised portions. The cavity includes a bottom portion which is a lower region of the recessed part, the bottom portion having an outer circumferential edge which is circular in a top view. With a height of the raised portion relative to a height position of a deepest portion of the cavity being represented as H1 and a diameter of an outer circumferential edge of the bottom portion of the cavity being represented as D, H1/D as a ratio of the height H1 of the raised portion to the diameter D of the cavity is set to be in a range of 0.05 or more and 0.36 or less.