Luftfederbein mit einer Druckkammer für Kraftfahrzeuge

摘要

In air-spring legs with a pressure chamber in each case for motor vehicles, in which the respective pressure chamber can be subjected to different pressures via a connector leading to the outside, a minimum pressure is to be ensured in the respective pressure chamber irrespective of external influences. This minimum pressure is also to be present in the case of a demounted or not yet mounted spring leg in the pressure chamber thereof. For this purpose, the connector of the pressure chamber of the air-spring leg has in each case an automatically operating pressure relief valve which can be designed to maintain a minimum pressure which can be predetermined for the chamber, and by means of which pressure relief valve the connector is open at a pressure which is acting from the interior of the pressure chamber or from the outside and is above the minimum pressure and, at a pressure below it, is closed. The closure element of the pressure relief valve is, in particular, a tubular elastomer which is pulled onto a cylindrical basic body and by means of which bores running through the basic body are separated from one another or connected to one another in terms of flow.