Patent ID: 7938411

Claim:
A system for improving maneuverability of an associated multi-axle vehicle having an air suspension assembly including first and second air bags comprising: a reservoir of pressurized air; a leveling valve receiving pressurized air from the reservoir; a valve selectively delivering air to the air bags of the associated vehicle; a pressure limiting valve assembly for preventing the first air bags from being completely exhausted wherein the pressure limiting valve assembly includes: a solenoid valve receiving a control signal in response to both the controller and a signal from an associated vehicle operator to partially exhaust air from the first air bags whereby vehicle maneuverability is improved at low speeds; and an inversion valve that selectively alters its operation in response to a pressure signal from the solenoid valve; and a controller for monitoring a speed of the vehicle and selectively providing a control signal indicative of whether the vehicle speed is below a predetermined threshold; a pressure reducing valve that reduces air received from the reservoir; a double check valve that communicates with the pressure reducing valve and the inversion valve, and delivers control pressure to the air delivering valve; and a synchronization valve interposed between the pressure reducing valve and the double check valve.