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. 05, 2014
Filed:
May. 01, 2009
Yoshihiro Okada, Susono, JP;
Yoshihiro Okada, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A spark ignition-type internal combustion engine of the present invention is provided with a variable compression ratio mechanism able to change a mechanical compression ratio, a variable valve timing mechanism able to control a closing timing of an intake valve, and an EGR mechanism feeding part of the exhaust gas through the EGR passage as EGR gas into a combustion chamber. In the spark ignition type internal combustion engine, at the time of engine low load operation, compared with at the time of engine high load operation, the mechanical compression ratio is made higher. The higher the EGR rate, the higher the actual compression ratio is made.