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:
May. 27, 2008
Filed:
May. 17, 2007
Applicants:
Yasushi Morii, Nagoya, JP;
Motoki Uehama, Kariya, JP;
Inventors:
Yasushi Morii, Nagoya, JP;
Motoki Uehama, Kariya, JP;
Assignee:
Denso Corporation, Kariya, Aichi-pref., JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A valve timing controller includes an electric motor generating a cogging torque on the motor shaft, an current control means for controlling an electricity supplied to the electric motor, and a phase-changing mechanism varying a relative rotational phase between the crankshaft and the camshaft according to a rotation of the motor shaft. The cogging torque has a peak value which is greater than an absolute value of a cam torque applied to the motor shaft from the camshaft through the phase-changing mechanism.