Passenger Car Air Spring

An air spring, also known as an air bag or air bellows, is a component used in place of conventional steel springs in certain heavy vehicle applications, including buses, trucks, and some passenger cars . It is designed to provide a smooth and constant ride quality, and in some cases, it is used for sports suspension . Air springs are made of rubber bellows that contain pressurized compressed air, and they are inserted into the vehicle's factory coil spring . The air spring expands into the spaces in the coil spring, preventing the factory spring from fully compressing and keeping the vehicle from sagging .

Air springs have several advantages and functions in passenger cars. They can keep the vehicle at a constant level, regardless of the load it carries .This feature allows for improved aerodynamics at high speeds and can increase the vehicle's range .

Air springs can also optimize airflow under the car for passive battery cooling in electric vehicles and protect the batteries in bad road conditions, ensuring a minimum ground clearance .

Additionally, switchable air springs can provide different degrees of stiffness, allowing for quick transitions between a firm suspension for confident and safe driving behavior and a more comfortable setup for long road trips .