Patent ID: 11958330
Assignee: ZF CV SYSTEMS GLOBAL GMBH
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. An assembly in a compressed-air system of a vehicle provided with an air ride suspension, the vehicle equipped with a plurality of air springs, the assembly being configured to lift a vehicle body of the vehicle in relation to a road level by pressure-filling at least one of the plurality of air springs, the assembly comprising:
a pneumatic circuit having a plurality of pilot-controlled solenoid valves;
said plurality of solenoid valves being switchable in cooperation with an electronic control device;
a pressure line for filling the air springs, said pressure line being connected to a compressed air supply;
said pressure line including a first branch line for filling the air springs, said first branch line including first supply pipes for each of the plurality of air springs;
said pressure line including a second branch line for providing a pilot pressure to said plurality of pilot-controlled solenoid valves, said second branch line including second supply pipes for said pilot-controlled solenoid valves;
said plurality of pilot-controlled solenoid valves including first pilot-controlled solenoid valves;
wherein, in said first branch line, said first supply pipes include at least one of said first pilot-controlled solenoid valve for each of the plurality of air springs, wherein said first pilot-controlled solenoid valves each have a gate and a block position;
said plurality of pilot-controlled solenoid valves including a second pilot-controlled solenoid valve configured as a pneumatic pressure-controlled solenoid valve;
said first branch line being configured to connect to said pressure line via said second pilot-controlled solenoid valve, said second pilot-controlled solenoid valve having a first gate position for filling the plurality of air springs and a second gate position for venting said first branch line;
said second branch line being connected to said pressure line via a check valve, said check valve having a block position against venting or pressure drop in said second branch line; and,
wherein said check valve is configured such that the pilot pressure is at least 5 bar.