Patent ID: 8876122

Claim:
A vehicle level control, comprising: at least one air spring for cushioning a vehicle body relative to at least one vehicle axle; a compressed air generator; an air dryer connecting said air spring and said compressed air generator in fluid communication; a check valve connecting said compressed air generator to a surrounding atmosphere thereof via an intake line, said check valve opening in an intake direction of said compressed air generator; a pneumatically controllable first directional valve connecting said air spring to an atmosphere discharge in fluid communication with said air dryer, said first directional valve having a pneumatic control input and a reset device on opposite ends thereof; an electrically controllable second directional valve connecting said air spring to said pneumatic control input of said first directional valve in fluid communication to convey pressure in said air spring to said pneumatic control input to oppose a reset force of said reset device in a first position of said second directional valve and connecting said pneumatic control input of said first directional control valve to the atmosphere to end discharging of said air spring in a second position of said second directional valve; and a first line connected to and extending from a supply line of said air spring and connected to a compressed air accumulator via a first changeover valve, said compressed air accumulator being connected in fluid communication via a second line with a second changeover valve therein connected to said intake line extending between said check valve and said compressed air generator.