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. 08, 2015
Filed:
Apr. 07, 2011
Applicants:
Atsushi Hayashida, Aichi-ken, JP;
Yuu Yokoyama, Okazaki, JP;
Haruhito Fujimura, Toyota, JP;
Inventors:
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01); F01L 1/344 (2006.01);
U.S. Cl.
CPC ...
F01L 1/34 (2013.01); F01L 1/3442 (2013.01); F01L 2001/34469 (2013.01); F01L 2001/34476 (2013.01); F01L 2250/02 (2013.01); F01L 2800/00 (2013.01); F01L 2800/14 (2013.01);
Abstract
A variable valve timing device that allows a valve timing of an engine valve to be varied by relatively rotating a vane rotor and a housing. The variable valve timing includes a lock mechanism that releases the locking in accordance with the application of a lock releasing oil pressure. A crank angle CCA at which the application of the lock releasing oil pressure is instructed can be varied in accordance with an engine speed NE so that the lock releasing oil pressure rises at a crank angle in which cam torque is suitable for lock releasing.