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, 2009
Filed:
Dec. 04, 2006
Yuji Miyanoo, Seto, JP;
Yuji Miyanoo, Seto, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
When the engine output request is increased in a state in which the valve closing timing of an intake valve () is before intake BDC, a target value (LT) for the maximum lift of an intake valve is changed straight away, regardless of the actual air intake amount, to a value which makes the valve closing timing of the valve become a timing which is after the BDC and is spaced away from the BDC. In this case, by drive controlling a variable valve operating mechanism () based upon the target value (LT), the valve closing timing of the intake valve () is changed straight away from before the intake BDC to after the intake BDC, which shortens the time period in which, during this changing process, the valve closing timing of the intake valve () is present in the vicinity of the intake BDC as much as possible.