Patent ID: 8060287

Claim:
A braking system for a motor vehicle comprising: a plurality of driven wheels; a drive system coupled to the driven wheels for providing traction power for the driven wheels and providing a regenerative braking mode for the driven wheels during slowing or stopping of the motor vehicle; pneumatically actuated service brakes coupled to the driven wheels; an operator controlled brake actuator; a pneumatic brake actuation line coupled from the operator controlled brake actuator to the pneumatically actuated service brakes for the driven wheels; a pressure regulator in the pneumatic brake actuation line; and a brake controller responsive to operation of the operator controlled brake actuator for closing the pressure regulator in the pneumatic brake actuation line until a torque limit of the drive system is reached when operating in the regenerative braking mode and after the torque limit of the drive system is reached progressively opening the pressure regulator to meet additional braking demand.