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. 28, 2014
Filed:
Feb. 28, 2011
Jin-woo Lee, Rochester Hills, MI (US);
Bakhtiar Brian Litkouhi, Washington, MI (US);
Elizabeth S Nunning, Troy, MI (US);
Jin-Woo Lee, Rochester Hills, MI (US);
Bakhtiar Brian Litkouhi, Washington, MI (US);
Elizabeth S Nunning, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method is provided of estimating a road grade of a current driven road. A nominal value of a vehicle operating parameter is measured during a nominal vehicle operating condition. The vehicle operating parameter is related to a vehicle thrust power. The nominal value of the vehicle operating condition is comprised of a nominal acceleration corresponding to the nominal value when the vehicle is driven on a substantially non-inclined road. The nominal value and nominal acceleration is stored in a memory. An actual value of the vehicle operating parameter is determined during a current vehicle operating condition. A vehicle acceleration corresponding to the actual value of the vehicle operating parameter is measured. The road grade of the current driven road is estimated as a function of a comparison between the measured acceleration value and the nominal acceleration that would be expected for the actual value of the vehicle operating parameter.