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:
Jun. 28, 2016
Filed:
Jul. 22, 2010
Chad T. Zagorski, Clarkston, MI (US);
Aamrapali Chatterjee, Okemos, MI (US);
Nikolai K. Moshchuk, Gross Pointe, MI (US);
Shih-ken Chen, Troy, MI (US);
Chad T. Zagorski, Clarkston, MI (US);
Aamrapali Chatterjee, Okemos, MI (US);
Nikolai K. Moshchuk, Gross Pointe, MI (US);
Shih-Ken Chen, Troy, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A vehicle control method includes iteratively modifying a level of braking of the vehicle until it is determined that the vehicle has substantially lost traction with respect to the road surface, then determining the coefficient of friction between the road surface and the tire based on the level of braking at the time the vehicle substantially lost fraction. In one embodiment, previous ABS or other vehicle control events are used as a basis for estimating an initial level of braking to be applied during the friction measurement procedure. Such a deterministic maneuver can also function as a collision warning to the driver of the vehicle.