Patent ID: 9381899
Filing Date: 2016-07-05
CPC Classification: B60T

Claim Text:
1. An apparatus for protecting an intact portion of a service brake system from a failed wheel end of a vehicle having at least two wheel ends, comprising: a spring brake actuator provided for each of the wheel ends for actuating a service brake and releasing a spring applied parking brake; a spring brake control valve for controlling actuation of the spring brake actuator for parking braking; a differential protection valve provided for each of the wheel ends for controlling a first supply of fluid to the spring brake actuator for releasing the spring applied parking brake; a relay valve for applying and releasing the service brake via the spring brake actuator; an antilock braking modulator provided for each of the wheel ends for controlling a second supply of fluid to the spring brake actuator for service braking; and an antilock braking system control unit for determining an operation state of each of the wheel ends and controlling the antilock braking modulators of each of the wheel ends, individually, based upon detection of a failed operation state; wherein, when the operation state of a first wheel end of the at least two wheel ends is a fault state, the differential protection valve protects an intact wheel end service brake by preventing the parking brake of each wheel end of the at least two wheel ends that is in a normal operation state from automatically applying.