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:
Feb. 05, 2002
Filed:
Jan. 19, 2001
Masaki Toriumi, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In electromagnetically operated engine valve position controlling apparatus and method, after such an initialization before an engine start as to hold the engine valve (for example, an intake valve) at a closure position (or at a full open position) and hold another engine valve (for example, an exhaust valve) at the full open position (or at the closure position) is carried out, such a correction for an error in an output value of a position sensor to detect a displaced position of an armature with respect to a pair of electromagnets in the electromagnetically operated valve unit due to an aging effect as to correct a relationship of the output value of the position sensor to a normally detected value of the position of the armature is carried out on the basis of; for example, the two different output signal values of the position sensor which corresponds to a closure position of the intake valve and corresponds to the full open position of the exhaust valve. Other embodiments on the correction of relationship of the output value of the position sensor to the detected value of the position of the armature are disclosed.