Patent ID: 8434773

Claim:
A lift axle control valve ( 200 ) for controlling a vehicle lift axle, the lift axle control valve ( 200 ) comprising: a vehicle port ( 103 ) configured to receive a vehicle pressure; a suspension port ( 106 ) configured to receive a suspension pressure, with the suspension pressure comprising a pressure that is controlled according to one or more suspension characteristics of the vehicle; and wherein the lift axle control valve ( 200 ) is configured to receive a lift axle control signal, actuate the lift axle control valve ( 200 ) to connect one or more lift bag output ports ( 121 ) to the vehicle port ( 103 ) and the vehicle pressure and to connect one or more load bag output ports ( 131 ) to the vent port ( 118 ) if the lift axle control signal comprises a lift command, and actuate the lift axle control valve ( 200 ) to connect the one or more load bag output ports ( 131 ) to the suspension port ( 106 ) and the suspension pressure and connect the one or more lift bag output ports ( 121 ) to the vent port ( 118 ) if the lift axle control signal comprises a load command.