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:
Jul. 05, 2011
Filed:
Jul. 25, 2008
Chandra S. Namuduri, Troy, MI (US);
Scott R. Kloess, Rochester Hills, MI (US);
Suresh Gopalakrishnan, Farmington Hills, MI (US);
Yat-chung Tang, Rochester, MI (US);
Chandra S. Namuduri, Troy, MI (US);
Scott R. Kloess, Rochester Hills, MI (US);
Suresh Gopalakrishnan, Farmington Hills, MI (US);
Yat-Chung Tang, Rochester, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for improving a failure mode diagnostic of an electric power steering system by overcoming a motor electric lock condition due to position sensor signal corruption or other motor faults. If certain conditions are met, the method determines that the motor is in an electric lock condition, and then reduces a torque current command to the motor so that it is able to be rotated by a vehicle hand-wheel. Once the motor is able to be rotated, then the method determines whether certain conditions have been met to determine whether the position sensor is malfunctioning.