What is the purpose of the air compressor in the air brake system?

The primary purpose of the air compressor in the air brake system is to generate and maintain the necessary air pressure required for the operation of the brakes. This pressure is crucial as it allows the brakes to engage and disengage effectively, enabling the train to stop or slow down as needed. The compressor pumps air into the brake system's reservoirs, ensuring that there is always enough pressure available for safe and reliable braking.

The reliability and efficiency of the air brake system fundamentally depend on the consistent supply of compressed air, which is why the functionality of the air compressor is vital. It plays a critical role in both the initial application of the brakes and the release of the braking force, making it an essential component in train operations.