Selective actuation of secondary circuit of dual brake valve

摘要

A vehicle has a primary braking system and a secondary braking system. The vehicle has a dual brake valve with a primary circuit for pressurizing the primary system in response to application of force to a brake pedal, and a secondary circuit for pressurizing the secondary system in response to application of the primary circuit or force to a brake pedal. The vehicle also has an actuator for actuating the secondary circuit of the dual brake valve independently of the primary circuit, to provide for advanced braking functions such as roll stability and yaw stability. The actuator may be pneumatic or electric. The actuator can be energized by a vehicle electronic control unit in response to receiving a sensor output indicative of a vehicle condition.