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:
Jan. 08, 2013
Filed:
Nov. 05, 2008
Daisuke Akihisa, Susono, JP;
Yukihiro Nakasaka, Suntou-gun, JP;
Eiichi Kamiyama, Mishima, JP;
Daisaku Sawada, Gotemba, JP;
Daisuke Akihisa, Susono, JP;
Yukihiro Nakasaka, Suntou-gun, JP;
Eiichi Kamiyama, Mishima, JP;
Daisaku Sawada, Gotemba, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In an internal combustion engine, a variable compression ratio mechanism able to change a mechanical compression ratio and a variable valve timing mechanism able to control the closing timing of an intake valve are provided. The mechanical compression ratio is held at a maximum mechanical compression ratio at the engine low load operation side and gradually made to decrease as the engine load increases at the engine high load operation side. The actual compression ratio is held nearly constant at the engine high load operation side and is made to decrease as the engine load decreases at the engine low load operation side.