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:
Nov. 23, 2010
Filed:
Aug. 01, 2008
Daisuke Akihisa, Susono, JP;
Eiichi Kamiyama, Mishima, JP;
Shigeo Kikori, Fukushima, JP;
Akio Kikori, Legal Representative, Fukushima, JP;
Daisuke Akihisa, Susono, JP;
Eiichi Kamiyama, Mishima, JP;
Shigeo Kikori, Fukushima, JP;
Akio Kikori, legal representative, Fukushima, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In a variable compression ratio internal combustion engine in which the compression ratio is changed by changing the combustion chamber volume, the present invention enables to inhibit irregularities in the air-fuel ratio involved by changing of the combustion chamber volume. In a transition period during which the compression ratio is changed, the actual volume of the combustion chamber realized by a compression ratio changing mechanism is detected. A factor that influences the air-fuel ratio (for example, fuel injection quantity, cylinder intake air quantity or amount of EGR) is controlled based on the actual volume of the combustion chamber thus detected to make the air-fuel ratio substantially equal to that before and after the change of the compression ratio.