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:
Jul. 20, 2021
Filed:
Apr. 27, 2018
Applicant:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Inventor:
Yasuo Okamoto, Shizuoka, JP;
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA, Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/18 (2006.01); F01L 1/053 (2006.01); F01L 1/46 (2006.01); F02F 1/24 (2006.01);
U.S. Cl.
CPC ...
F01L 1/181 (2013.01); F01L 1/053 (2013.01); F01L 1/462 (2013.01); F02F 1/24 (2013.01); F01L 2001/467 (2013.01);
Abstract
An internal combustion engine includes, as a lost motion spring that urges a rocker arm toward a cam, a compression coil spring supported on a cylinder head. A shaft is located on an inner side of the compression coil spring and extends along a winding axis of the compression coil spring. The internal combustion engine significantly reduces or prevents a decrease in the fuel efficiency and an increase in the size of the variable valve mechanism, while surging is unlikely to occur while running at a high speed, and it is possible to reduce the size or the weight of the rocker arm.