Patent ID: 7226057

Claim:
An apparatus for leveling a vehicle having an air suspension system which comprises an independently adjustable right front suspension assembly, left front suspension assembly, right rear suspension assembly, and left rear suspension assembly mounted to the vehicle, the apparatus for leveling a vehicle comprising, a sensor mounted to the vehicle to sense pitch and roll of the vehicle relative to a reference level plane, the sensor producing an orientation signal representing the vehicle pitch and roll; a controller coupled to the air suspension system and the sensor, wherein the controller, in response to an operator command, levels the vehicle relative to the reference level plane by sequentially actuating the suspension assemblies, wherein the controller interprets the orientation signal to determine an end and a side of the vehicle which are below the reference level plane, then alternating between adjusting the end and the side upwardly by sequentially supplying air to the suspension assemblies at the end and sequentially supplying air to the suspension assemblies at the side, each suspension assembly being inflated for a first predetermined period of time during each upward adjustment, and wherein the controller includes a memory for storing data corresponding to the reference level plane and is configured to write data representing an orientation signal to the memory to replace the reference level plane data with orientation signal data.