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:
Apr. 04, 2006
Filed:
Feb. 11, 2005
Tsuneyasu Nohara, Kanagawa, JP;
Yuuzou Akasaka, Yokohama, JP;
Katsuhiko Kawamura, Yokohama, JP;
Hajime Miura, Tokyo, JP;
Satoshi Nishii, Kawasaki, JP;
Tsuneyasu Nohara, Kanagawa, JP;
Yuuzou Akasaka, Yokohama, JP;
Katsuhiko Kawamura, Yokohama, JP;
Hajime Miura, Tokyo, JP;
Satoshi Nishii, Kawasaki, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A learning apparatus for a variable valve control of an internal combustion engine includes a variable valve operating mechanism, an actuator that rotationally drives the control shaft, a control shaft sensor that detects an angular position of the control shaft, a reference position determining section that determines whether or not the control shaft has reached a predetermined reference position under the drive from the actuator, a learning section that learns an output value of the control shaft sensor when it is determined that the control shaft has reached the reference position and stores the learned output value as a sensor output reference value, and a learning preparing section that causes the control shaft to be driven by the actuator toward the reference position when a crankshaft of the engine is rotating and supply of fuel to the engine is stopped. A learning method is also provided.