Daimler Chrysler Ag

Mercedes-benz Group Ag

Frank Schweickhardt

Hans Scheerer

Thomas Sprengel

Matthias Romer

Matthias Roemer

Jessica Gasper

Johannes Weiss

A method for checking a vehicle includes receiving measured data by an electronic computing device which is external to the vehicle and which is different from the vehicle. The measured data are received from a measurement device which is different from the vehicle and different from the electronic computing device and the measured data characterize an acceleration of the vehicle recorded by the measurement device and/or a noise of the vehicle recorded by the measurement device and/or an image of a subregion of the vehicle recorded by the measurement device. The received measured data are evaluated by the electronic computing device and the vehicle is checked for a malfunction based on the evaluating of the received measured data by the electronic computing device.

Method for checking at least one vehicle, and electronic computing device

In a process for controlling the quantity of air in a closed, chargeable and estimable pneumatic level control system of a vehicle, which level control system comprises at least one pressure sensor, one pump, an actuator, a storage reservoir and pressure lines interconnecting these components, at least one vehicle body level sensor, and a temperature sensor, which measures the ambient temperature, from the values measured an air mass of the level control system is calculated on the basis of the air pressures in the components, the level of the vehicle and the ambient temperature. Furthermore, the level of the vehicle, the ambient temperature and a maximum possible change in level from a particular vehicle level are used to calculate a vehicle-specific desired air mass and a desired air pressure in the system. The air mass is increased if the actual air pressure drops below the desired air pressure, and the air mass is reduced if the actual air pressure exceeds the desired air pressure.

Method of controlling the quantity of air in a vehicle level control system

An air suspension for a vehicle includes at least one air spring per wheel at at least one vehicle axle, one pump, at least one accumulator, and one circuit arrangement for connecting these units, the pressure side of the pump being connected to the accumulator or the air springs. To form a closed compressed-air system, the intake side of the pump is connected via at least one valve to the accumulator or the air springs, and at least the air-guiding interior pump chambers between the intake side and the pressure side of the pump have a pressure-tight design. The air suspension system requires comparably low energy consumption and small unit volume at a high level of efficiency.

Air suspension having a closed compressed-air system

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Stuttgart, Germany

Frank Schweickhardt