Patent ID: 9311761
Filing Date: 2016-04-12
CPC Classification: B60W,G07C

Claim Text:
1. A method of identifying, for a vehicle, a low friction surface from a road surface with a slope, the method comprising the steps of: with the vehicle at standstill, turning the vehicle ignition switched on, calculating, in a control unit, a normal load for the vehicle, determining if the vehicle remains at standstill or is moving, and if the vehicle is moving, calculating, in the control unit, a vehicle load using suspension information obtained from the vehicle, calculating, in the control unit, a road slope angle based on the calculated vehicle load and calculated normal load, calculating, in the control unit, a normal slope angle, and comparing, in the control unit, the normal slope angle to the calculated road slope angle to determine if the vehicle is on a low friction surface or on a sloped surface.