System for Controlling a Parking Brake in a Vehicle

A system for controlling a parking brake in a vehicle, comprising:

• a first electropneumatic valve module disposed between a fluid source and a wheel brake on the vehicle, the first electropneumatic valve module including a first solenoid movable between a first solenoid delivery state allowing fluid flow from a supply port on the first electropneumatic valve module to a delivery port on the first electropneumatic valve module and a first solenoid exhaust state allowing fluid flow from the delivery port on the first electropneumatic valve module to an exhaust port on the first electropneumatic valve module;
• a second electropneumatic valve module disposed between the fluid source and the wheel brake, the second electropneumatic valve module including a second solenoid movable between a second solenoid delivery state allowing fluid flow from a supply port on the second electropneumatic valve module to a delivery port on the second electropneumatic valve module and a second solenoid exhaust state allowing fluid flow from the delivery port on the second electropneumatic valve module to an exhaust port on the second electropneumatic valve module;
• a brake controller configured to transmit a first control signal to the first solenoid, the first control signal configured to position the first solenoid in one of the first solenoid delivery state and the first solenoid exhaust state;
• and,
• a secondary control circuit configured to generate, responsive to a first feedback signal from the first electropneumatic valve module indicative of whether the first solenoid is in the first solenoid delivery state or the first solenoid exhaust state, a second control signal, the second control signal configured to position the second solenoid in one of the second solenoid delivery state and the second solenoid exhaust state.