Electropneumatic brake valve with release and running modes

Details Electropneumatic brake valve with release and running modes Electropneumatic brake valve with release and running modes

B - Operations, Transporting

60

T

B60T 13/68 (2006.01) B60T 13/66 (2006.01) B61H 13/00 (2006.01)

Patent

CA 2246053

An electropneumatic brake controller of the present invention including a main reservoir, pneumatic brake pipe relay and first and second restrictions connected in series with the main reservoir, the brake pipe relay and brake pipe and first electropneumatic valve connected in parallel to the second restriction. The second restriction is smaller than the first restriction. The first electropneumatic valve is responsive to an electric release signal to cut out the second restriction. When the two restrictions are in series, this is the running mode whereas when the second restriction is cut out, this is the release mode. A control unit controls the electropneumatic valves to produce an overcharge cycle in response to a release brake signal. This cycle includes overcharging the brake pipe, holding the overcharged condition for a fixed period of time and bleeding to a normal release brake pipe pressure.

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