Patent ID: 7962310
Filing Date: 2011-06-14
Classification: B60T,B60W

Abstract:
1. A method of estimating longitudinal speed of a motor vehicle including two driven wheels and at least one electronic central processing unit of which a controller runs the method based on rotational speeds of the four wheels, two of which are driven, said method comprising: determining a first fastest wheel, a second fastest wheel, a third fastest wheel, and a fourth fastest wheel, in an acceleration phase, calculating an estimated longitudinal speed of the vehicle based on the speed of the third fastest wheel, and calculating an acceleration of said vehicle so that said acceleration does not exceed the acceleration of the fourth fastest wheel; under deceleration in a deceleration phase, calculating the estimated longitudinal speed of the vehicle based on the speed of the first fastest wheel and calculating the acceleration of said vehicle in absolute terms so that said acceleration does not exceed that of the second fastest wheel; and when the estimated longitudinal speed of the vehicle lies between the speed of the third fastest wheel and the speed of the first fastest wheel, maintaining said estimated longitudinal speed constant.