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:
Jan. 04, 2005
Filed:
Aug. 08, 2003
Katsuya Matsuura, Saitama-ken, JP;
Hitoshi Takahashi, Saitama-ken, JP;
Masaki Takayama, Saitama-ken, JP;
Mitsuru Sugimoto, Saitama-ken, JP;
Teruyoshi Morita, Saitama-ken, JP;
Tomio Kimura, Saitama-ken, JP;
Katsuya Matsuura, Saitama-ken, JP;
Hitoshi Takahashi, Saitama-ken, JP;
Masaki Takayama, Saitama-ken, JP;
Mitsuru Sugimoto, Saitama-ken, JP;
Teruyoshi Morita, Saitama-ken, JP;
Tomio Kimura, Saitama-ken, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A valve actuating apparatus for an internal combustion engine selectively operating in the normal Otto cycle or the Miller cycle is provided which enables the engine to achieve stable combustion and improved fuel economy during cruising or in a low-load engine operating region. A delayed-closing cam for Miller cycle operation and a normal cam having a cam profile for earlier valve-closing timing of the intake valve than a cam profile of the delayed-closing cam are provided on a camshaft. A cam profile-switching mechanism switches between the delayed-closing cam and the normal cam, for opening and closing the intake valve. An ECU controls the switching mechanism such that when a detected operating condition of the engine indicates starting or idling, the intake valve is operated by the normal cam, and when the detected operating condition indicates cruising, the intake valve is operated by the delayed-closing cam.