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. 20, 2013
Filed:
Apr. 11, 2008
Masayoshi Hattori, Toyota, JP;
Tsukasa Abe, Gotenba, JP;
Masayoshi Hattori, Toyota, JP;
Tsukasa Abe, Gotenba, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An idling-time target phase setting unit () variably sets a target phase based on a target idle speed that is set by a target idle speed setting unit. () Especially, when the target idle speed is lower than a predetermined rotational speed and operating noise of a variable valve timing mechanism () is easily heard by, for example, a driver, the.idling-time' target phase setting unit () sets the target phase so that a range, in which the valve phase is allowed to change, is restricted within a phase region where a speed reduction ratio is high and the operating noise is relatively low.