Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric
Patent
1995-03-02
1996-04-23
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Multiple systems
Fluid pressure and electric
303 28, 303 60, 303 82, B60T 1134
Patent
active
055097278
ABSTRACT:
A portable, microprocessor controlled single-car test unit for a railway freight brake control valve for automatically executing pressure manipulations to evaluate the operating conditions of the control valve. The pipe bracket portion is connected to a brake pipe, an auxiliary reservoir, an emergency reservoir, a brake cylinder retaining valve and a brake cylinder each being connected to a respective fluid passageway. The test unit accesses the fluid passageways at access ports, respectively connected to each passageway. Valves are utilized in the test unit to manipulate the pressure in the fluid passageways and pressure transducers measure fluid pressure in the passageways. The pressure transducers are controlled by a computer having a microprocessor connected to an input output device. The computer records and stores each pressure measurement, and calculates and stores the differences between selected pairs of the pressure measurements as well as elapsed time data for the measurements. The data is stored and outputted.
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"Code of Air Brake System Tests for Freight Equipment" Association of American Railroads, Nov., 1992.
Gaughan Edward W.
Hart James E.
Reid Jeffrey D.
Troiani Vincent F.
Baier G. P.
Graham Matthew C.
Westinghouse Air Brake Company
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