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In most cases, air suspension is used to achieve a smooth and constant driving quality, but in some instances, sports suspensions feature an air suspension system too. Similarly, air suspension replaces a conventional steel spring suspension in heavier vehicle applications, like trucks, tractor-trailers, passenger buses, and even passenger trains. Air suspension has also become popular in low-riding trucks like this gorgeous 1982 Dodge D200 Camper Special.

What Is Electronically Controlled Air Suspension?

According to the company now known as Dunlop Systems and Components, at the start of the 1990s, Dunlop developed and installed the Electronic Controlled Air Suspension (ECAS) system on the 1993 Range Rover Classic and again on the Range Rover P38A. The United Kingdom-based company developed the ECAS to include several key features:

• Vulcanized, heavy-duty rubber air springs at each of the vehicle's wheels

• An air compressor in the vehicle's trunk or under the hood of the vehicle

• A storage tank for compressed air, which allows you to store air at around an average of 150 PSI

• Valve blocks which direct air to the four springs from the storage reservoir through a set of solenoids, valves, and o-rings

• ECAS computer that communicates between the vehicle's main computer to calculate where to direct air pressure