Daimler Chrysler Ag

Gerhard Lohrmann

Eberhard Kutscher

Udo Walter

Joachim Lang

Reiner Schneider

In a method for monitoring the functioning of a compressor, which charges a gas-filled accumulator chamber with a working pressure, the actual pressure prevailing in the accumulator chamber is measured and compared to a setpoint pressure. In response to a deviation in the actual pressure from the setpoint pressure, an error signal is produced. The comparison of the actual pressure and the setpoint pressure is carried out during the charging operation when the accumulator chamber is charged.

Method and device for monitoring the functioning of a compressor

It is proposed that a pneumatic suspension leveling system for vehicles with pneumatic suspension leveling elements assigned to the vehicle axles and/or vehicle wheels, with a compressor and a central pressure accumulator fed by it for the compressed air supply of the pneumatic suspension leveling elements, with an accumulator pressure sensor which detects the air pressure in the central pressure accumulator and generates a signal value correlating thereto, and with an electronic control device which processes the signal values of the central pressure accumulator and induces a pressure charging of the central pressure accumulator by the compressor, when the signal value of the accumulator pressure sensor reaches a predetermined lower threshold signal value and terminates this pressure charging when the signal value of the accumulator pressure sensor reaches a preset upper threshold signal value be improved with respect to its functional capacity. This is achieved by providing an ambient pressure sensor which detects the air pressure in the atmosphere surrounding the vehicle and generates a signal value correlating thereto, whereby the control device processes the signal values of the ambient pressure sensor and varies the upper threshold signal value in function thereof.

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Asperg, Germany

Gerhard Lohrmann