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. 01, 2015
Filed:
Nov. 14, 2013
Denso Corporation, Kariya, Aichi-pref., JP;
Yasuo Hirata, Chita-gun, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A control system for a variable valve timing apparatus for an internal combustion engine comprises: a electronic control unit having (i) a phase control portion for temporarily reversing a direction of changing a rotational phase of a cam shaft, so that the direction is temporarily changed to an opposite direction of changing the rotational phase of the cam shaft to a target value, when the locked condition is detected after the engine operation is stopped and (ii) a phase-changing amount setting portion for setting a phase-changing amount when controlling the rotational phase of the cam shaft in the reversed direction after the engine operation is stopped. The phase control portion carries out the control of the rotational phase of the cam shaft in the reversed direction based on the phase-changing amount set by the phase-changing amount setting portion, after the engine operation is stopped.