Electronic control device and control circuit for an air suspension system of a commercial vehicle

A method of controlling an air suspension system of a commercial vehicle, the method comprising;

• an electronic control device comprising a control outlet and control logic;
• a level control valve device connected to the control outlet of the electronic control device, the level control valve device comprising a port for an air suspension bellow, a port for an aeration device, a port for a deaeration device, a drive element mechanically coupled to a vehicle wheel or a vehicle axle, a valve element coupled to the drive element by a drive mechanism such that a movement of the drive element induces a change of an operating position of the valve element, and a counter valve element, wherein the valve element and the counter valve element have a first relative position in which the port for the air suspension bellow is connected to the port for the aeration device and a third relative position in which the cart for the air suspension bellow is connected to the port for the deaeration device;
• an actuator that is controlled via the control outlet of the electronic control device;
• and
• in the control logic, when a level change for lifting or lowering a vehicle body at a ramp is set manually by an operator, generating a control signal for the actuator at the control outlet, the control signal inducing a change of at least one of a relative position of the valve element and the drive element of the level control valve device and a relative position of the counter valve element and a housing accommodating the valve element and the counter valve element, wherein when the level change for lifting or lowering the vehicle body at the ramp that is set manually by the operator is made, the level change causes the actuator to change the relative position of the valve element and the drive element corresponding to the level change set by the operator.