Patent ID: 8840172

Claim:
A method for suspension of a vehicle cabin of a utility vehicle having at least one adjustable air spring being capable of accepting and expelling at least one additional volume of air and arranged between the utility vehicle cabin and a base frame of the vehicle, the at least one air spring controllable by a control device, the method comprising: at a sensor measuring one of vertical acceleration or vertical speed of the vehicle cabin; at a control device, automatically determining at the control device mode of spring operation based on the measured acceleration or speed of the vehicle cabin; and automatically controlling transfer of air to and from the at least one air spring based on the determined mode of spring operation; and wherein a first mode of spring operation is configured to provide for smooth road operation, if the measured acceleration or speed of the vehicle cabin is within a first range; wherein a second mode of spring operation is configured to provide for rough road operation, if the measured acceleration or speed of the vehicle cabin is within a second range that is higher than the first range; wherein the first mode does not include a comfort zone and the second mode has a comfort zone having a non-zero range of motion, the air spring being connected to the air container in the comfort zone.