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:
Oct. 13, 2009
Filed:
Jan. 23, 2006
Yoshihito Moriya, Nagoya, JP;
Yoshihito Moriya, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An internal combustion engine includes a plurality of variable valve timing mechanism (VVTs), each corresponding to one of a pair of banks. When an abnormality is detected in a VVT corresponding to one of the banks, the valve closing timing of the intake valves during starting of the engine in the bank corresponding to the normally functioning VVT is adjusted to valve timing that increases the power generated by combustion compared to the engine power generated during normal starting of the engine. Specifically, the valve closing timing of the intake valves during starting of the engine in the bank corresponding to the normally functioning VVT is brought closer to the bottom dead center of the intake stroke of the engine. As a result, deterioration of the starting performance of the engine due to the abnormality of the VVT is compensated for.