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. 20, 2007
Filed:
Jun. 15, 2005
Akihiko Minato, Fujisawa, JP;
Akihiko Minato, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
The present invention provides a method for controlling a closing operation of an exhaust valve () in an internal combustion engine. A current position Xof the exhaust valve () and a rotation speed Ne of the internal combustion engine are determined, and on the basis of the current position Xand rotation speed Ne, a time Tat which a piston arrives at the current position Xof the exhaust valve () is calculated. The closing operation of the exhaust valve () is then started before this arrival time T. Next, a time Tat which the gap between the exhaust valve () and piston reaches a first predetermined value hcis calculated, and when this time Tarrives, the closing operation of the exhaust valve () is stopped temporarily. A time Tat which the piston arrives at the stopping position Xof the exhaust valve () is then calculated, and the closing operation of the exhaust valve () is resumed before this arrival time T.