Assembly in a compressed air system of a vehicle

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.

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;
• said second pilot-controlled valve is a pilot-controlled 3/2-way solenoid valve;
• and,
• wherein said first branch line is configured to connect to an atmosphere via a silencer when said pilot-controlled 3/2-way solenoid valve is switched to said second gate position.

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 pneumatic circuit and said electronic control device are integrated in the assembly and said electronic control device is connected to a vehicle control system via at least one of connecting components and a CAN bus.

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.