What is the primary function of the air brake system in a commercial vehicle?

The primary function of the air brake system in a commercial vehicle is to slow down or stop the vehicle using compressed air. This system operates by using air pressure to engage the brake pads against the brake drums or rotors. As air is compressed and released through various components in the braking system, it activates the brakes effectively, allowing the driver to decelerate or stop the vehicle smoothly.

Using compressed air rather than hydraulic fluid enables the air brake system to function with increased reliability and efficiency, especially in larger vehicles that require greater braking force. This is particularly important in commercial vehicles, as they often carry heavy loads that necessitate a robust braking system. The ability to modulate braking based on air pressure helps maintain control and safety, reinforcing the crucial role of this system in the overall operation of commercial vehicles.