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, 2005
Filed:
Nov. 04, 2003
Yuichiro Hayase, Toyota, JP;
Kenji Tsubone, Susono, JP;
Akihiro Yanai, Anjo, JP;
Yoshinori Kadowaki, Toyota, JP;
Toshio Fuwa, Nissin, JP;
Yuichiro Hayase, Toyota, JP;
Kenji Tsubone, Susono, JP;
Akihiro Yanai, Anjo, JP;
Yoshinori Kadowaki, Toyota, JP;
Toshio Fuwa, Nissin, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A main CPU determines whether or not there is a request for one valve driving based on an engine operating state such as an engine speed and a load factor, with reference to a control map. When it is determined that there is a request for one valve driving, it is determined whether or not there is an overlapping period between opening periods. When it is determined that there is no overlapping period, a high speed control is performed for controlling electromagnetically driven valves. When it is determined that there is no request for one valve driving, or when it is determined that there is the overlapping period, a low speed control is performed for controlling electromagnetically driven valves.