DEVICE FOR GENERATING PRESSURE GAS, IN PARTICULAR FOR A COMPRESSED AIR BRAKE INSTALLATION.

摘要

1. Device for producing compressed gas, especially for a compressed-air brake unit, having the following features : a) a compressor is provided which draws in the gas to be compressed by way of a suction valve and has a compressed-gas outlet ; b) the compressed-gas outlet of the compressor is connected by way of a pressure line to a utilising means, especially a utilising means including a reservoir ; c) the compressor is provided with a pneumatic control connection for opening the suction valve ; d) a change-over valve is provided by which the pneumatic control connection of the compressor can be connected selectively to the atmosphere or to the pressure line (7) receiving the pressure of the utilising means in such a manner that when the pressure in the pressure line (7) that receives the pressure of the utilising means drops below a predetermined level, the change-over valve (6) is connected to the atmosphere ; characterised by the following features : e) there is arranged in the pressure line (3, 7) a pressure control device (4, 13) by way of which a first part (3) of the pressure line (3, 7) connected to the compressed-gas outlet (1a) of the compressor (1) can be vented depending on the pressure of the utilising means ; f) for actuating the change-over valve (6) the latter has an actuating device which is so arranged and designed that when the first part (3) is vented the pneumatic control connection (1b) of the compressor (1) is connected to a second part (7) of the pressure line (3, 7), which part receives the pressure of the utilising means.