Patent ID: 9218695
Filing Date: 2015-12-22
Classification: B60G,B60T,B60W,G01P,G07C

Abstract:
1. A method of monitoring a determined wheel speed of a wheel, the method comprising: receiving a first wheel speed value from a first wheel speed sensor, the first wheel speed value being indicative a measured wheel speed of a first wheel of a vehicle; receiving a second wheel speed value from a second wheel speed sensor, the second wheel speed value being indicative of a measured wheel speed of a second wheel of the vehicle; receiving a third wheel speed value from a third wheel speed sensor, the third wheel speed value being indicative of a measured wheel speed of a third wheel of the vehicle; determining an estimated wheel speed value for a fourth wheel of the vehicle based on at least two values selected from a group consisting of the first wheel speed value, the second wheel speed value, and the third wheel speed value; determining a calculated wheel speed value for the fourth wheel based on information received from a transmission output speed sensor; and determining that a fault condition exists based on deviations between the estimated wheel speed value for the fourth wheel and the calculated wheel speed value for the fourth wheel; wherein the estimated and calculated wheel speed values for the fourth wheel do not include any direct measurement of a wheel speed of the fourth wheel.