Pneumatic Braking System
Average and heavy commercial vehicles are generally equipped with pneumatic braking systems. The possibility of the convenient coupling of additional braking circuits particularly when speaking of trailers serves as an advantage. The disadvantage of higher loads and space requirements is accepted in this class of vehicles. The figure shows the design and components of a double-circuit air brake system.
While the wheel brakes of the air brake system largely correspond to the ones in the hydraulic brake system, the constructional components of the control and transmission devices differ considerably.