Air suspension is a type of vehicle  scion  powered by an engine driven or electric air pump or compressor. This pump pressurizes the air, using compressed air as a spring. Air suspension replaces conventional steel springs. If the engine is left off for an extended period, the car will settle to the ground. The purpose of air suspension is to provide a smooth ride qualityand in some cases self-leveling.Over the last decade or so air suspension has become extremely popular in the custom xb automobile culture: street rods, trucks, cars, and even motorcycles may have air springs. They are used in these applications to provide an xb adjustable suspension which allows vehicles to sit extremely low, yet be able rise to a level high enough to suspension maneuver over obstacles and inconsistencies in the roadways (and parking lots). These systems generally employ small, electric or engine-driven air xb compressors suspension which sometimes fill an on-board air receiver tank which stores compressed air for use in the future without delay.Either xb of these reservoir systems may be suspension fully xb adjustable, xb being able to adjust each wheel's air xb pressure individually. suspension This allows the user to tilt the vehicle side to side, front to back, in some instances "hit a 3-wheel" (contort the vehicle so one wheel lifts up from the ground) or even "hop" the entire vehicle into xb the air. When a pressure reservoir is present, the flow of air or gas is commonly controlled with pneumatic solenoid valves. This allows the user to make adjustments by xb simply pressing a momentary-contact electric button or switch.It powers the front brakes first, priorities via a security valve, and depending on type of vehicle, can power the steering, clutch, gear change, suspension

• Double wishbones are usually considered to have superior dynamic characteristics, load handling capability and are still found on higher performance vehicles. xb Examples of makes in which double wish bones can be found include Audi, Acura, and BMW suspension.