MODULATOR MEANS IN A DRIVER'S BRAKE VALVE EQUIPMENT FOR INDIRECTLY ACTING COMPRESSED-AIR BRAKES OF RAIL VEHICLES

摘要

1. Modulator means in a driver's brake valve equipment for indirectly acting compressed-air brakes of rail-vehicles, the driver's brake valve equipment comprising a pressure controller (16) and a main control valve (14) for controlling the pressure in a main air line (11), the modulator means (50), which exhibits a hysteresis for producing a larger brake-jump and a smaller release-jump, having a valve (51) arranged in a connecting pipe (23, 33) between the pressure controller (16) and a control chamber (42) of the control valve (14) characterised in that the modulator means is a single pneumatic valve unit (50), a modulator valve (50), having in addition to the first valve (51) a second valve (71), arranged in a connecting pipe (19, 79) between a pressure limiting valve (12) and the control chamber (42) of the control valve (14), two pressure chamber (56, 76) and there between a differential piston (70), and in that the pressure chamber (56) with the large piston (57) in it connects the first valve (51) to the pressure controller (16) and the pressure chamber (76) with the small piston (77) in it connects the second valve (71) with the pressure limiting valve (12).