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:
Aug. 20, 2019
Filed:
Jun. 14, 2017
Applicant:
Subaru Corporation, Tokyo, JP;
Inventor:
Takayuki Nakaji, Tokyo, JP;
Assignee:
SUBARU CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F 3/26 (2006.01); F02F 3/28 (2006.01); F02B 23/10 (2006.01);
U.S. Cl.
CPC ...
F02F 3/26 (2013.01); F02B 23/10 (2013.01); F02F 3/28 (2013.01); F02B 2023/106 (2013.01); Y02T 10/125 (2013.01);
Abstract
A piston of an internal combustion engine includes a crown surface, a first cavity, and a second cavity. The crown surface forms an internal wall surface of a combustion chamber. The first cavity is a depression provided in the crown surface. The second cavity is a depression provided inside the first cavity. The first cavity includes an upstream portion located upstream of the second cavity in a flow direction of a tumble flow flowing along the crown surface and a downstream portion located downstream of the second cavity in the flow direction. The upstream portion extends further in the flow direction than the downstream portion.