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. 07, 2006
Filed:
Oct. 03, 2002
Hideyuki Nishida, Suntou-gun, JP;
Isao Matsumoto, Susono, JP;
Kazuhiko Shiratani, Susono, JP;
Shoji Katsumata, Gotenba, JP;
Tametoshi Mizuta, Susono, JP;
Keiji Yoeda, Numazu, JP;
Makoto Ogiso, Mishima, JP;
Hideyuki Nishida, Suntou-gun, JP;
Isao Matsumoto, Susono, JP;
Kazuhiko Shiratani, Susono, JP;
Shoji Katsumata, Gotenba, JP;
Tametoshi Mizuta, Susono, JP;
Keiji Yoeda, Numazu, JP;
Makoto Ogiso, Mishima, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A control method with variable feedback gain for energization of an electro-magnetically driven intake/exhaust valve of an internal combustion engine increases opening and closing speeds of the intake/exhaust valve driven with electromagnets having small capacity and brings the final speed of the opening and closing action of the valve close to zero. A target moving speed of the armature relative to the electromagnets is determined dependent upon a spacing distance of the armature from the electromagnet; at least a part of energization of the electro-magnetically driven valve is controlled through feedforward control so as to make an actual moving speed of the armature relative to the electromagnets in conformity with the target moving speed while at least the other part of the energization is controlled through feedback control based upon a deviation of the actual moving speed from the target moving speed.