Pneumatic emergency brake assurance module

Abstract

A pneumatic emergency brake assurance module comprises a high capacity transfer valve connected in a first position to the output of the variable load relay valve and in a second position connected to a source of emergency braking air pressure. A timing reservoir is in communication with the pilot port of the high capacity transfer valve. A check valve / choke circuit provides parallel connections between a double check valve and the output of the variable load relay valve such that flow from the variable load relay valve passes through a charging choke and opposite flow to the variable load relay valves passes through a dissipation choke.

Description

technical field [0001] As is well known in the field of brake control, modern train brake control systems typically use a central controller unit to control the braking of rail vehicles including trains. A train operator located in the lead locomotive controls the train's brake handle or similar device to apply and release the brakes of the trucks or bogies on each rail vehicle as desired. Typically, input from the brake lever is processed by a cab control unit and communicated to a central controller unit. In response to these and other inputs, the central controller unit issues braking command signals to each rail vehicle along the train line in the form of a pneumatic signal, or an electrical signal, or even a pneumatic and electrical signal. The braking equipment of each rail vehicle applies or releases the brakes, as indicated by the specific brake command signal received. The central controller unit sends braking command signals to each rail vehicle along the pneumatic...

AI Technical Summary

Problems solved by technology

Depending on the configuration of the pneumatic brake assembly and the wheel slip control assembly, the use of electronic hardware safeguard timers is usually not sufficient to avoid prolonged periods of reduced braking in the absence of sufficient brake application cycles

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