Popular Model Rolling Lobe Rubber Air Spring W01-358-9978 For Truck And Trailer S-28929

Popular Model Rolling Lobe Rubber Air Spring W01-358-9978 For Truck And Trailer S-28929

OEM NUMBER

DESCRIPTION

Air spring, load-carrying component of an air suspension system used on machines, automobiles, and buses. A system used on buses consists of an air compressor, an air-supply tank, leveling valves, check valves,bellows , and connecting piping. Basically, an air-spring bellows is a column of air confined within a rubber and fabric container that looks like an automobile tire or two or three tires stacked on top of one another. The check valves admit additional air to the bellows from the air-supply tank to maintain vehicle height when the load is increased, and the leveling valves vent excess air from the bellows when the vehicle rises because of unloading. The vehicle thus remains at a fixed height regardless of load. Although an air spring is flexible under normal loads, it becomes progressively stiffer when compressed under an increased load. Air suspension was introduced on some luxury cars in the late 1950s, but it was dropped after several model years. Recently, new leveling systems have been developed for passenger cars, including air-adjustable rear shock absorbers; some air-spring systems operate without an air compressor.

Air springs are employed through the use of an air compressor which fills and empties the pliable air bladder. The load is not distributed to the rubber liner, which only serves to contain the gas; the weight is attached to a piston or bead plate, which is directly supported by the air with very little deflection. A self-leveling mechanism is common to keep the air spring's load stable, and occasionally a separate coil spring is incorporated into the design. Also available are electronic air spring systems that can monitor air pressure, filter compressor air (preventing damage to the rubber bellows), and a lock to keep air inside of the spring in case of compressor or air line failure.

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