| 摘要 |
<p>An electro-pneumatic control system (10) for a vehicle fluid pressure braking system controls communication to the trailer supply line (30) and to the vehicle spring applied, fluid pressure released parking brakes (78). Relays (66,92) are controlled by manually actuated switches (42,58) to actuate solenoid valves (74,84) which control communication to the supply line (30) and to the parking brakes (78). Actuation of the solenoid valves (74,84) is maintained by the relays (66,92) in response to pressure actuated switches (76,88) which are responsive to the pressure levels in the supply line (30) and in the parking brake (78).</p> |
