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

Claim 8:
9. A compressed air system of an air-suspended vehicle having a vehicle body and an air ride suspension, the compressed air system comprising:
a plurality of air springs;
a lift assembly configured to lift the vehicle body in relation to a road level by filling at least one of said plurality of air springs;
said lift assembly including a pneumatic circuit including a plurality of pilot-controlled solenoid valves;
said plurality of solenoid valves being switchable in cooperation with an electronic control device;
a compressed air supply;
said lift assembly including a pressure line for filling said plurality of air springs, said pressure line being connected to said compressed air supply;
said pressure line including a first branch line for filling said plurality of air springs, said first branch line including first supply pipes for each of said 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 plurality of 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 said 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;
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 said plurality of air springs and a second gate position for venting said first branch line;
wherein only said second branch line is 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,
said lift assembly being a modular component configured to mate with other components of the compressed air system.