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:
Jun. 02, 2015
Filed:
Mar. 18, 2013
Applicant:
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Inventors:
Nobuhiko Matsuo, Isesaki, JP;
Kentaro Mikawa, Isesaki, JP;
Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01); F02D 13/00 (2006.01);
U.S. Cl.
CPC ...
F01L 1/34 (2013.01); F02D 13/00 (2013.01); F01L 2820/032 (2013.01);
Abstract
A control unit for a variable valve timing mechanism for changing a cam phase by an electric actuator determines an influence on the operation of the variable valve timing mechanism based on the engine operating conditions. Then, based on the determination result, the control unit reduces the operation amount of the electric actuator in a predetermined range of the rotation angle of a camshaft.