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:
Sep. 29, 2020
Filed:
Oct. 28, 2016
Applicant:
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Inventors:
Toshiaki Nishimoto, Hiroshima, JP;
Keiji Araki, Hatsukaichi, JP;
Assignee:
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01); F01L 1/344 (2006.01); F02B 63/06 (2006.01); F02B 67/04 (2006.01); F01L 1/24 (2006.01); F01L 1/02 (2006.01); F01L 1/18 (2006.01); F01L 1/047 (2006.01); F01L 1/053 (2006.01); F01L 13/00 (2006.01);
U.S. Cl.
CPC ...
F01L 1/3442 (2013.01); F01L 1/022 (2013.01); F01L 1/026 (2013.01); F01L 1/2405 (2013.01); F02B 63/06 (2013.01); F02B 67/04 (2013.01); F01L 1/185 (2013.01); F01L 2001/0476 (2013.01); F01L 2001/0537 (2013.01); F01L 2001/3443 (2013.01); F01L 2001/34473 (2013.01); F01L 2001/34496 (2013.01); F01L 2013/001 (2013.01); F01L 2250/02 (2013.01); F01L 2305/00 (2020.05); F01L 2800/00 (2013.01); F01L 2800/05 (2013.01); F01L 2810/02 (2013.01); F01L 2820/041 (2013.01);
Abstract
The number of advance chambers is larger than the number of retard chambers in an intake variable valve timing (VVT), whereas the number of retard chambers is larger than the number of advance chambers in an exhaust VVT. Accordingly, with limitation of an oil pressure that can be used by the VVTs, a pumping loss in a transition period in which a valve overlap amount is changed by advancing or retarding a valve timing can be reduced.