Method, Controller and System for Monitoring Brake Operation

摘要

Various embodiments of an apparatus and method for monitoring a brake operation are disclosed. In accordance with one aspect, the brake operation monitoring system comprises a plurality of wheel speed sensors, a brake demand sensor; a plurality of stability sensors and a controller. The controller comprises wheel speed ports; a brake demand port; stability sensor ports; a communication port for receiving a plurality of messages; and a processing unit comprising control logic. The control logic receives a brake demand signal, at least one stability signal indicative of the cornering of the vehicle, and individual wheel speeds. The control logic calculates a master value to compare to individual wheel speed signals if the brake demand signal indicates no braking.

主权项

1. A method of monitoring brake operation on a vehicle comprising:
receiving a brake demand signal indicative of a brake demand; receiving a plurality of wheel speed signals from individual wheel speed sensors associated with individual wheel ends of the vehicle; determining a master value based on the plurality of wheel speed signals over an initiation time period for comparison with the plurality of wheel speed signals; determining a baseline calibration of each of the plurality of wheel speed signals over a calibration time period; determining if a long-term time period has elapsed since the brake demand signal indicated brake demand; determining the vehicle is not accelerating; calculating a difference of each individual wheel speed signal from the baseline calibration over a second time period equal to the calibration time period wherein the long-term time period has elapsed; comparing the difference to a long-term threshold; determining a long-term fault exists when the difference of an individual wheel speed signal is greater than or equal to the long-term threshold; and transmitting a brake control signal to at least one brake control device to modify the brake control at the individual wheel end associated with the wheel speed signal having the long-term fault.