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. 23, 2014
Filed:
Sep. 20, 2011
Atsushi Murai, Isesaki, JP;
Tomoyuki Murakami, Isesaki, JP;
Yoshitatsu Nakamura, Isesaki, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
The present invention relates to an apparatus for and a method of controlling a variable valve timing mechanism. The valve timing mechanism changes over between a first cam for which the closing timing IVC of the intake valve is after intake bottom dead center, and a second cam for which the closing timing IVC is closer to intake bottom dead center than the closing timing IVC with the first cam. Here at the time of stopping the internal combustion engine, the valve timing mechanism changes over to the first cam, and the initial intake stroke performs operation at low effective compression ratio. In the second and subsequent intake strokes, the valve timing mechanism changes from the first cam to the second cam.