What is an air brake system?

An air brake system is a specific type of braking mechanism that utilizes compressed air to apply the brakes on a vehicle. This system is commonly found in heavy-duty vehicles like trucks and buses due to its ability to provide powerful braking force and maintain effective control under various load conditions.

The operation of the air brake system involves several key components: the compressor that generates compressed air, storage tanks that hold the air, and brake chambers that convert the air pressure into mechanical force to engage the brakes. This system allows for quicker and more reliable braking because it can generate significant force while also providing the ability to modulate braking for safety and efficiency.

This system is distinct from hydraulic brakes, which rely on fluid pressure to function, as well as manual systems that do not incorporate any electronic or pneumatic components. Additionally, air brakes are not only used in emergency situations; they are employed as the primary braking source for many commercial vehicles, making their understanding crucial for drivers needing a Class B CDL.