Patents by Inventor Simon YNGVE

Simon YNGVE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Linear and non-linear identification of the longitudinal tire-road friction coefficient
    Patent number: 8498775
    Abstract: A method of estimating a tire-road friction coefficient includes determining when the slope of a tire characteristic curve relating a utilized longitudinal friction of a tire to longitudinal slip of the tire is linear and non-linear. When the slope of the tire characteristic curve is linear, then the tire-road friction coefficient is estimated by correlating the slope of the tire characteristic curve to the tire-road friction coefficient. When the slope of the tire characteristic curve is non-linear, indicating that the tire is near or at saturation, then the tire-road friction coefficient is estimated by calculating a current utilized longitudinal friction of the tire.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: July 30, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Simon Yngve, Youssef A. Ghoneim
  • LINEAR AND NON-LINEAR IDENTIFICATION OF THE LONGITUDINAL TIRE-ROAD FRICTION COEFFICIENT
    Publication number: 20120179327
    Abstract: A method of estimating a tire-road friction coefficient includes determining when the slope of a tire characteristic curve relating a utilized longitudinal friction of a tire to longitudinal slip of the tire is linear and non-linear. When the slope of the tire characteristic curve is linear, then the tire-road friction coefficient is estimated by correlating the slope of the tire characteristic curve to the tire-road friction coefficient. When the slope of the tire characteristic curve is non-linear, indicating that the tire is near or at saturation, then the tire-road friction coefficient is estimated by calculating a current utilized longitudinal friction of the tire.
    Type: Application
    Filed: January 10, 2011
    Publication date: July 12, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Simon Yngve, Youssef A. Ghoneim
  • METHOD AND APPARATUS FOR ROAD SURFACE FRICTION ESTIMATION BASED ON THE SELF ALIGNING TORQUE
    Publication number: 20110130974
    Abstract: A method and an apparatus are disclosed for estimating a road surface friction between a road surface and a tire of a vehicle. The method includes, but is not limited to computing, in a slope estimation step, a slope estimate k_sl for a slope of a linear region of a self aligning torque function that is defined by a self aligning torque as a function of a slip angle. The method further includes, but is not limited to deriving a first estimate ?_sl of a road friction coefficient from the slope estimate k_sl, and deciding, in a linearity estimation step, whether a current slope k_op is within the linear region of the self aligning torque function. If it is decided in the linearity estimation step that the current slope k_op is within the linear region of the self aligning torque function, the first estimate ?_sl of the road friction coefficient is output as a second estimate ?_cont of the road friction coefficient.
    Type: Application
    Filed: September 7, 2010
    Publication date: June 2, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Simon YNGVE, Youssef GHONEIM