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:
Dec. 30, 2008
Filed:
Sep. 06, 2005
Applicants:
Hibiki Ueura, Toyota, JP;
Naohide Fuwa, Toyota, JP;
Inventors:
Hibiki Ueura, Toyota, JP;
Naohide Fuwa, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02N 3/00 (2006.01); F02B 41/00 (2006.01); F02B 67/00 (2006.01); F16H 59/60 (2006.01); F16H 59/62 (2006.01); F16H 59/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A valve characteristic changing mechanism is supplied with oil discharged from an electric oil pump in addition to oil discharged from a mechanical oil pump that is driven by an operation of an internal combustion engine. Driving of the electric oil pump is controlled such that a work rate of the electric oil pump increases as a temperature of the oil supplied to the valve characteristic changing mechanism increases, or as a viscosity of the oil is reduced.