Method for controlling hydrodynamic oil retarder for motor vehicle, involves detecting pressure between inlet valves and outlet valve after switching outlet valve to open position and maintaining intake valves in closed position

摘要

The method involves checking functional states of outlet valve (5) and inlet valves (3,7) provided in a compressed air supply line (2), during closed state. The pressure between inlet valves and outlet valve is detected indirectly. The fault condition of inlet valves is detected based on detected pressure between inlet valves and outlet valve. The pressure between inlet valves and outlet valve is detected after switching outlet valve to open position and maintaining intake valves in closed position so as to detect fault condition of outlet valve. An independent claim is included for control air system.