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. 21, 2001
Filed:
Mar. 20, 2000
Keiji Yoeda, Numazu, JP;
Isao Matsumoto, Susoso, JP;
Shouji Katsumata, Gotenba, JP;
Masaaki Tanaka, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In control apparatus and method, an ECU detects the positions of intake valves of cylinders when an ignition switch is turned off. Then, the ECU continues supplying exciting current to first electromagnetic coils corresponding to completely closed intake valves to hold those intake valves in the completely closed state. The ECU brings to the intake valves that are not in the completely closed state at the time of determining the turning-off of the ignition switch, to the completely closed state. At the elapse of a predetermined time following the determination of turning-off of the ignition switch, the ECU stops supplying exciting current to the first electromagnetic coils of the intake valves to bring the intake valves to a held-open state.