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:
Oct. 04, 2016
Filed:
Oct. 24, 2013
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
NSK Ltd., Tokyo, JP;
Abstract
An electric power steering system is provided which can take an abnormality countermeasure without being affected by a torque abnormality signal and without giving an uncomfortable feeling to a driver when torque abnormality occurs. Abnormality of a steering assist command value is detected by employing a dual detection configuration of a main ECU clip () and a sub ECU interlock (). When abnormality of a steering torque Ti detected by a torque sensor () is detected, input values to the main ECU clip () and the sub ECU interlock () are switched from the steering torque Ti detected by the torque sensor () to an alternative torque value. Here, the alternative torque value employs a previous torque value calculated based upon the normal steering torque Ti detected by the torque sensor () when the abnormality of the steering torque Ti detected by the torque sensor () is not detected.