What is the minimum release time required for air brake systems?

The minimum release time required for air brake systems is based on the performance standards necessary to ensure proper operation of the brakes. For air brake systems, the minimum release time is set to 0.55 seconds. This time allows the system to vent air pressure effectively and enables the brake components to return to their neutral positions, which is crucial for the system's reliability and safety. Having a standardized release time ensures that the air brakes can reset quickly and prepare for the next application, preventing brake drag that could lead to overheating and reduced component lifespan. This timing standard is an important guideline in the maintenance and operation of air brake systems on vehicles, including school buses, to ensure they function properly and safety standards are met.