Commercial vehicle's automatic parking control system

The utility model discloses an automatic parking control system of commercial car on the structure basis of current vehicle gas receiver, relay valve, spring brake jar, in the braking gas circuit between gas receiver to relay valve, inserts two -position three way magenetic exchange valve, its air inlet, gas outlet and gas vent respectively with the control mouth and the atmosphere intercommunication of gas receiver, relay valve, the solenoid valve links to each other with parking the control unit through its drive circuit. When vehicle starting, electricity on the solenoid valve, the gas outlet switches on with the air inlet for the gas outlet and the air inlet of relay valve switch on, and high -pressure gas relieves the parking and accomplishes the starting in the relay valve gets into the brake chamber of spring brake jar, when the vehicle normally travel, the solenoid valve kept electric state, when vehicle parking parking, the solenoid valve is the electricity down, and the gas outlet switches on with t