Air suspension system

An air suspension system for a multi-axle vehicle having at least one air bag supporting each side of each axle, a level controlling valve for separately controlling air flow to the air bags on each side respectively, a separate air line connected between each valve and a distribution manifold, separate air lines connected between each manifold and each of the air bags on either side respectively, the first mentioned air lines being of substantially the same size and length, and the second mentioned airlines between the respective manifolds and the respective air bags being of the same size and length whereby substantially the same volume of air is supplied to each air bag to maintain stability under changing driving conditions.

The system of any preceding claim, wherein each level controlling valve has a separate air feed line from an air supply tank of the vehicle to improve responsiveness.

The system of any preceding claim, wherein the level controlling valves are actuated by control means extending to a common rigid bar fixed to the means attaching the air bags on either side to one axle.

The system of any preceding claim, wherein the vehicle is a prime mover having driven axles

An air suspension system for a multi-axle vehicle having at least one air bag supporting each side of each axle, a level controlling valve for separately controlling air flow to the air bags on each side respectively, separate air lines connecting each valve and each of the air bags on either side respectively, each level controlling valve having a separate air feed line from an air supply tank of the vehicle to improve the responsiveness of the system.