System for train terminal test

Patent metadata

Field	Value
Publication number	US-11358580-B2
Application number	US-201916717280-A
Country	US
Kind code	B2
Filing date	Dec 17, 2019
Priority date	Dec 17, 2019
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A system for identifying whether the braking system of a train is functioning properly such as during a train terminal test. A monitor on a rail car is used to detect abnormalities in the braking system and can report problems to a handheld terminal or a central controller in the locomotive. The monitor has a pressure sensor for measuring brake pipe pressure, auxiliary reservoir pressure, emergency reservoir pressure, and brake cylinder pressure at the rail car. The monitor also has a controller that can calculate whether brake pipe reduction resulted in the appropriate amount of brake cylinder pressure. The monitor can then provide the results locally via a visual indicator or remotely to a handheld terminal used by a train inspector or the controller in the locomotive. Testing data over time may be stored for future reference or transmitted remotely to assist with maintenance and service scheduling.

First claim

What is claimed is:

1. A monitor for installation on a rail car, comprising:
a pressure sensor in communication with a source of brake pipe pressure, a source of auxiliary reservoir pressure, a source of emergency reservoir pressure and a source of brake cylinder pressure; and
a controller interconnected to the pressure sensor and configured to calculate whether a reduction of actual pressure at the source of brake pipe pressure results in an acceptable change in actual pressure at the source of brake cylinder pressure according to a predetermined threshold.

2. The monitor of claim 1 , further comprising an indicator and wherein the controller is configured to provide an indication via the indicator whether the reduction of actual pressure at the source of brake pipe pressure was accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure.

3. The monitor of claim 1 , further comprising a communication interface interconnected to the controller and wherein the controller is programmed to output an indication of whether the reduction of actual pressure at the source of brake pipe pressure was accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure via the communication interface.

4. The monitor of claim 3 , wherein the indication comprises a signal sent to a remote device interconnected to the communication interface.

5. The monitor of claim 4 , wherein the remote device comprises a handheld terminal interconnected to the communication interface by a wireless connection.

6. The monitor of claim 1 , further comprising a control and communication device located in the cab of a locomotive and in communication with the controller.

7. The monitor of claim 6 , wherein the control and communication device is configured to command a computer controlled brake of the locomotive to charge a brake pipe comprising the source of brake pipe pressure with pressure and to release a predetermined amount of pressure from the brake pipe and cause the reduction of actual pressure at the source of brake pipe pressure.

8. The monitor of claim 7 , wherein the controller is programmed to communicate whether the reduction of actual pressure at the source of brake pipe pressure is accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure to the control and communication device.

9. The monitor of claim 8 , wherein the control and communication device is configured to provide an indication on a driver display of the locomotive whether the reduction of actual pressure at the source of brake pipe pressure is accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure.

10. The monitor of claim 9 , wherein the control and communication device is interconnected to a communication interface and is programmed to output the indication of whether the reduction of actual pressure at the source of brake pipe pressure was accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure to a remote device via the communication interface.

11. The monitor of claim 10 , wherein the remote device comprises a server programmed to track whether the reduction of actual pressure at the source of brake pipe pressure was accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure for a plurality of rail cars, each of which includes the controller and the pressure sensor.

12. A method of monitoring a rail car braking system, comprising the steps of:
providing a monitor on a rail car, wherein the monitor comprise a pressure sensor in communication with a source of brake pipe pressure, a source of auxiliary reservoir pressure, a source of emergency reservoir pressure and a source of brake cylinder pressure and a controller interconnected to the pressure sensor;
releasing pressure in a brake pipe to cause a reduction of pressure at the source of brake pipe pressure at the rail car;
calculating whether the reduction of actual pressure at the source of brake pipe pressure is accompanied by an acceptable change in actual pressure at the source of brake cylinder pressure of the rail car according to a predetermined threshold; and
indicating whether the reduction of actual pressure at the source of brake pipe pressure was accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure at the rail car.

13. The method of claim 12 , wherein the step of indicating whether the reduction of actual pressure at the source of brake pipe pressure is accompanied by the acceptable change in actual pressure at the source of brake cylinder pressure comprises sending a signal via a communication interface.

14. The method of claim 13 , further comprising the step of receiving the signal with a control and communication device located in a cab of a locomotive that is coupled to the rail car.

15. The method of claim 14 , further comprising the step of receiving the signal with a handheld terminal.

Assignees

• New York Air Brake Llc

Inventors

• Wright Eric C

Classifications

• B60T8/1705

  for rail vehicles · CPC title

• B60T17/221

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• B61H13/34

  Details · CPC title

• B60T17/228 Primary

  for railway vehicles · CPC title

• G01M17/08 Primary

  Railway vehicles · CPC title