Leak-Tightness and operational test of a stop valve in a pneumatic suspension

The present invention relates to a method for the leak-tightness and operational testing of a stop valve of a pneumatic suspension of a motor vehicle, with a gas spring supporting a wheel relative to the vehicle body in each case at least on one axle, and with at least in each case one active volume capable of being connected via the stop valve, the pneumatic system and the chassis including at least one connectable pressure source, at least one connectable pressure sink and, for each axle, at least one measuring device directly or indirectly determining the distance between the axle and the vehicle body, and also damping elements limiting the stroke of the respective gas spring. A method is for the leak-tightness and operational testing of a stop valve of a pneumatic suspension of a motor vehicle with gas springs, with at least in each case one active volume capable of being connected via the stop valve, the vehicle including at least one connectable pressure source, at least one connectable pressure sink and, for each axle, at least one measuring device determining the distance to the vehicle body, and also damping elements limiting the stroke of the respective gas spring. For this purpose, in a first step, with the stop valve open, a stroke, during which at least one damping element is compressed, is set on the individual gas spring. In a second step, after the closing of the stop valve, the individual gas spring is set to a part-stroke of its total stroke between the damping elements. In a third step, after the opening of the stop valve, the distance which is established between the axle and the vehicle body is determined with the aid of the measuring device and is compared with a predetermined desired value. Thus, a method for leak-tightness and operational testing is provided, which is performed, without the dismantling of components, by the devices already present in the vehicle.