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:
Jun. 07, 2011
Filed:
Jul. 21, 2006
Hiroshi Enomoto, Toyota, JP;
Hiroshi Enomoto, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A valve control device performs control for eliminating or preventing fixation of an EGR valve () by opening/closing the valve near its fully closed position. After an engine stops, the valve control device performs 'a fixation avoiding operation' for opening/closing EGR valve () near the fully closed position, and further, performs 'a fixation determining operation'. When it is determined that the fixation of EGR valve () is eliminated, EGR valve () is positioned at the fully closed position, and a reference position is corrected such that the fully closed position is regarded as a reference position at which a valve opening/closing control is performed during the operation of the engine.