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:
Dec. 18, 2007
Filed:
Apr. 15, 2005
Masahiro Arai, Yokohama, JP;
Katsuhiko Kawamura, Yokohama, JP;
Masahiro Arai, Yokohama, JP;
Katsuhiko Kawamura, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A variable valve control system for an internal combustion engine, includes a valve to open and close an opening of a combustion chamber of the engine, a variable lift characteristic control mechanism to adjust a valve lift characteristic of the valve, a sensing section to collect information needed to determine an estimated valve lift characteristic of the valve, an input section to receive an externally input calibration-mode command. The variable valve control system is configured to perform: controlling the valve lift characteristic to be a mechanically defined small setting in response to the calibration-mode command; collecting the information when the valve lift characteristic is the small setting; and calibrating the sensing section in accordance with the collected information.