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:
Aug. 04, 2015
Filed:
Feb. 12, 2014
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Ryo Tadokoro, Atsugi, JP;
Shinichi Kawada, Isehara, JP;
Atsushi Yamanaka, Atsugi, JP;
Hiroyuki Nemoto, Hitachi, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-shi, JP;
Abstract
A valve timing control system for an internal combustion engine, comprises: an electric intake valve timing control apparatus to vary an intake valve timing with torque produced by an electric motor with electric power supplied through a power supply mechanism; and an electric exhaust valve timing control apparatus to vary an exhaust valve timing with torque produced by an electric motor with electric power supplied through a power supply mechanism. A heat generating portion in the power supply mechanism of the intake valve timing control apparatus is made of a heat resisting material whereas a heat generating portion in the power supply mechanism of the exhaust valve timing control apparatus is made of a material lower in heat resistance than the heat resisting material of the intake valve timing control apparatus.