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:
Mar. 15, 1994
Filed:
Aug. 25, 1992
Masami Yamazaki, Okazaki, JP;
Atsushi Watanabe, Toyota, JP;
Yukiharu Ichinose, Toyota, JP;
Tatsuo Iida, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A control mechanism for shifting the rotational phase transmitted from an engine, and for controlling the timing of the intake and exhaust valves. A first gear mechanism integrally rotates with respect to a timing pulley, and has a set of inner peripheral gear teeth. A second gear mechanism integrally rotates with respect to a camshaft, and has a set of outer peripheral gear teeth. The number of gear teeth of the first gear mechanism is greater than that of the second gear mechanism. This gear ratio generates a rotational phase shift of the timing pulley with respect to the camshaft, in order to vary the opening and closing timing of the intake and exhaust valves. A drive means drives the first gear mechanism in order to vary the phase shift and to control the opening and closing timing of the intake and exhaust valves in accordance with the operating state of the engine.