本试验中，通过确定机械驱动的先导式制动控制阀和输出控制阀的特性，确定了SAE推荐的先导式制动控制阀和输出控制阀的特性。

This SAE Recommended Practice establishes uniform test procedures for determining input-output characteristics for those pilot-operated and mechanically actuated, modulating-type valves and through-type valves used in the service brake control system.