Patent ID: 6758087
Filing Date: 2004-07-06
Classification: B60L,G01P,Y02T

Abstract:
A method for determining a reference speed approximating a ground speed of a vehicle having a plurality of powered axles each having at least one wheel which is subject to creep relative to the ground as the vehicle is propelled, the method comprising:selecting a measured speed indicative of the vehicle speed from the axle of said plurality of axles having the lowest speed; determining the axle of said plurality of axles having a predetermined amount of creep and designating said axle as a speed axle; determining a derived speed for said speed axle; calculating a creep value for said speed axle; compensating said derived speed by subtracting a creep value from said derived speed to obtain a corrected speed indicative of the vehicle speed; determining operating dynamics for the vehicle; and generating the reference speed based on one of said measured speed or said corrected speed, in response to said operating dynamics.