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. 30, 2014
Filed:
Mar. 12, 2012
Hiroaki Uchisasai, Wako, JP;
Sumitaka Ogawa, Wako, JP;
Hiroaki Uchisasai, Wako, JP;
Sumitaka Ogawa, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A fail detecting device for a rotation angle sensor, for detecting a fail of the rotation angle sensor even if the number of rotation angle sensors is one. A cam is configured to be driven to rotate in one direction by an electric motor to reciprocate a push rod. An output voltage of an angle sensor is set so that the region equal to or lower than a first predetermined voltage and the region equal to or higher than a second predetermined voltage higher than the first predetermined voltage are recognized as a dead zone. The elapsed time after the transition to the dead zone is measured by a timer and it is determined that the angle sensor is in the fail state if the output voltage corresponding to the dead zone is detected although the estimated time of the passage through the dead zone has elapsed.