SERVICE BRAKE DEVICE WITH QUICK AIR RELEASE VALVE

摘要

The invention relates to a service brake device for vehicles comprising at least one pneumatic service brake device (22) with at least one piston and/or a membrane (28) which delimits a pressure chamber (24) which can be supplied with compressed air for applying the service brake and can be purged of compressed air for releasing the service brake, and delimited by a spring chamber (30) which receives spring means (38) prestressing the piston and/or the membrane (28) in the release position of the service brake. Said pressure chamber (24) comprises a pressure connection (26) which can be charged and purged by the brake line (56). The invention also relates to a quick air release valve (1) controlled by the pressure produced in the brake line, which is connected by the first connection thereof (2) to the brake line, by the second connection thereof (4) to the pressure connection (26) of the service brake cylinder (22) and by the third connection thereof (6) to the spring chamber (30) of the service brake cylinder (22), and which connects the second connection (4) to the third connection (6) based on a drop in pressure produced in the brake line (56).