Valve arrangement of an air suspension system of a vehicle and method for controlling such an air suspension system

A method for controlling an air suspension system of a vehicle having a valve arrangement, the valve arrangement including:

• a pressure generator having a two-stage compressor, an air dryer, a switchover valve for switching between a delivery operation and a regeneration operation;
• said compressor being configured to be driven by an electric motor;
• said pressure generator further having a working connection and an environment connection;
• a first main working line connected to said working connection of said pressure generator and branching into at least two first axle working lines;
• two bellows lines per vehicle axle, which each branch off from one of the at least two first axle working lines and lead via a first shutoff valve to an associated air bellows of a corresponding vehicle axle;
• said pressure generator having a second working connection connected to a delivery line of said pressure generator between two compressor stages of said compressor;
• a second main working line connected to said second working connection of said pressure generator;
• a second shutoff valve arranged in said second main working line;
• said second main working line branching into at least two second axle working lines downstream of said second shutoff valve;
• each of said at least two second axle working lines being connected to one of at least two branching points of said at least two first axle working lines at the vehicle axles via a corresponding third shutoff valve;
• each of said at least two first axle working lines having a fourth shutoff valve arranged therein;
• said second shutoff valve, said third shutoff valves, and said fourth shutoff valves being 2/2-way magnetic switching valves configured to be closed when in a non-energized state;
• the method, in order to tilt a vehicle body rapidly about a transverse axis of the vehicle, comprising simultaneously:
• switching on the compressor and opening the second shutoff valve arranged in the second main working line;
• opening the first and the third shutoff valves arranged in the at least two second axle working lines and in the two bellows lines at the vehicle axle at which the vehicle body is to be lowered;
• and,
• opening the first and the fourth shutoff valves that are arranged in a first of said at least two first axle working lines and in the two bellows lines at the vehicle axle at which the vehicle body is to be raised.

A method for controlling an air suspension system of a vehicle having a vehicle body and a valve arrangement, the valve arrangement including:

• a pressure generator having a two-stage compressor, an air dryer, a switchover valve for switching between a delivery operation and a regeneration operation;
• said compressor being configured to be driven by an electric motor;
• said pressure generator further having a working connection and an environment connection;
• a first main working line connected to said working connection of said pressure generator and branching into at least two first axle working lines;
• two bellows lines per vehicle axle, which each branch off from one of the at least two first axle working lines and lead via a first shutoff valve to an associated air bellows of a corresponding vehicle axle;
• said pressure generator having a second working connection connected to a delivery line of said pressure generator between two compressor stages of said compressor;
• a second main working line connected to said second working connection of said pressure generator;
• a second shutoff valve arranged in said second main working line;
• said second main working line branching into at least two second axle working lines downstream of said second shutoff valve;
• each of said at least two second axle working lines being connected to one of at least two branching points of said at least two first axle working lines at the vehicle axles via a corresponding third shutoff valve;
• each of said at least two first axle working lines having a fourth shutoff valve arranged therein;
• said second shutoff valve, said third shutoff valves, and said fourth shutoff valves being 2/2-way magnetic switching valves configured to be closed when in a non-energized state;
• a compressed air reservoir connected to the second main working line or one of said at least two second axle working lines;
• and,
• wherein, in order to tilt the vehicle body rapidly about a transverse axis of the vehicle, the method comprises simultaneously:
• switching over the switchover valve into a regeneration switching position;
• opening the first and fourth shutoff valves at the vehicle axle at which the vehicle body is to be lowered;
• and,
• opening the first and the third shutoff valves at the vehicle axle at which the vehicle body is to be raised.