Method and System for Determining Brake Shoe Effectiveness

• US 20090255329A1
• Filed: 04/14/2008
• Published: 10/15/2009
• Est. Priority Date: 04/14/2008
• Status: Active Grant

• Current Assignee: Wabtec Holding Corp (Westinghouse Air Brake Technologies Corporation)
• Original Assignee: Wabtec Holding Corp (Westinghouse Air Brake Technologies Corporation)
• Inventors: Wilson, M. Frank, Connell, Jason T.
• Granted Patent: US 7,765,859 B2
• Time in Patent Office: Days
• US Class Current: 73/121
• CPC Class Codes: B60T 17/228 for railway vehicles
• CPC Class Codes: B61L 15/0062 On-board target speed calculation or supervision
• CPC Class Codes: B61L 15/0072 On-board train data handling
• CPC Class Codes: B61L 25/025 Absolute localisation, e.g. providing geodetic coordinates
• CPC Class Codes: B61L 3/008 On-board target speed calculation or supervision track-side control of safe travel B61L27/20; speed control circuitry B60L3/08; speed control of electric drives B60L15/20
• CPC Class Codes: G01L 5/28 for testing brakes

Abstract

A system for determining brake shoe effectiveness of a braking arrangement of a train during operation of the train including at least one brake database including braking data and at least one train database including train data. A control system is in communication with the at least one brake database and the at least one train database, and the control system dynamically determines brake shoe effectiveness data based upon the braking data and the train data, where the brake shoe effectiveness data includes the ability of the braking arrangement to retard the train to a specified level.

Claims

1. A system for determining brake shoe effectiveness of a braking arrangement of a train during operation of the train, wherein the braking arrangement comprises at least one brake shoe mechanism configured to directly or indirectly contact at least one wheel of the train and retard rotation of the at least one wheel, the system comprising:

at least one brake database comprising braking data including at least one of the following;

braking arrangement data, brake shoe force data, brake shoe friction data, brake application time data, brake application level data, brake retarding force data, brake shoe type data, brake thermal characteristics data, braking ratio data or any combination thereof;

at least one train database comprising train data including at least one of the following;

wheel data, rail data, train position data, car position data, train speed data, track data, track location data, track curvature data, track profile data, track grade data, train weight data, car weight data, train length data, car length data, environmental data, authority data or any combination thereof; and

a control system in communication with the at least one brake database and the at least one train database, the control system configured to dynamically determine brake shoe effectiveness data based upon the braking data and the train data, the brake shoe effectiveness data comprising the ability of the braking arrangement to retard the train to a specified level.

2. The system of claim 1, wherein the specified level is a specified speed or a complete stop.

3. The system of claim 1, wherein the control system is further configured to determine a recovery time for at least one of the following:

the braking arrangement, the at least one brake shoe mechanism or any combination thereof.

4. The system of claim 1, wherein the control system is further configured to determine at least one operational parameter of the train based at least in part upon the determined brake shoe effectiveness data.

5. The system of claim 4, wherein the operational parameter is at least one of the following:

a speed limit, a maximum speed limit, a braking curve, a stopping distance, suggested braking arrangement usage, braking arrangement usage to retard the train to a specified speed level, braking arrangement usage to fully retard the train to a complete stop or any combination thereof.

6. The system of claim 5, wherein the operational parameter is a maximum speed limit, the control system further configured to automatically enforce the train to the determined maximum speed limit.

7. The system of claim 5, wherein the operational parameter is train speed, the control system further configured to automatically enforce the train to a specified speed limit.

8. The system of claim 5, wherein the operational parameter is a stopping distance, the control system further configured to determine the stopping distance based at least in part upon the brake shoe effectiveness data.

9. The system of claim 8, wherein the control system is in communication with the braking arrangement via a brake interface unit, the control system further configured to automatically brake the train based upon the determined stopping distance and a required stopping distance.

10. The system of claim 8, wherein the control system is in communication with:

the braking arrangement via a brake interface unit; and

a positioning system configured to determine the train position data,

wherein the control system is further configured to automatically brake the train based at least in part upon at least one of the following;

the determined stopping distance and the position data;

the train position and train location relative to a limit of authority;

the train position and train location relative to a reduced speed limit;

the train position and train location relative to a speed restriction;

or any combination thereof.

11. The system of claim 5, wherein the operational parameter is suggested braking arrangement usage, and wherein the suggested braking arrangement usage is provided to the operator.

12. The system of claim 11, wherein the suggested braking arrangement usage includes usage of at least one of the following:

automatic braking arrangement, dynamic braking arrangement, combination braking arrangement, emergency braking arrangement, air braking arrangement, pneumatic braking arrangement, mechanical braking arrangement or any combination thereof.

13. The system of claim 12, wherein the suggested braking arrangement usage is automatically implemented.

14. The system of claim 1, wherein the control system is in communication with the braking arrangement via a brake interface, the control system further configured to automatically enforce the train to the specified level.

15. The system of claim 1, further comprising a visual display device configured to present data to an operator of the train.

16. The system of claim 15, wherein a message is displayed to the operator on the visual display device, and wherein content of the message comprises at least one of the following:

brake shoe effectiveness data, braking data, train data or any combination thereof.

17. The system of claim 16, wherein the content of the message comprises an alert to the operator regarding the brake shoe effectiveness data at specified train positions on the track.

18. The system of claim 1, further comprising an alarm device configured to provide an alarm to an operator of the train based upon at least one of the following:

brake shoe effectiveness data, braking data, train data or any combination thereof.

19. The system of claim 18, wherein the alarm is at least one of the following:

an audio alarm, a visual alarm, a tactile alarm or any combination thereof.

20. The system of claim 1, wherein the control system is integrated with an on-board controller located on an engine of the train.

21. The system of claim 20, further comprising a receiver in communication with the on-board controller and configured to receive data comprising at least one of the following:

braking data, train data or any combination thereof.

22. The system of claim 1, wherein the control system is remotely located in a central dispatch system and in communication with an on-board controller located on an engine of the train, the system further comprising a receiver in communication with the on-board controller and configured to receive data comprising at least one of the following:

braking data, train data or any combination thereof.

23. The system of claim 1, wherein the control system determines brake shoe effectiveness data by:

(a) determining retarding force data based upon brake shoe mechanism force data and brake shoe mechanism friction data;

(b) determining brake application time data and brake application level data;

(c) determining specified train data; and

(d) determining brake shoe mechanism thermal characteristics including projected brake shoe fade data based at least in part upon brake shoe mechanism type data, brake application time data and brake application level data,

wherein the brake shoe effectiveness data is dynamically determined while the train is in operation based at least in part upon the determinations made in (a)-(d).

24. The system of claim 23, wherein the brake shoe force data is determined through physically sensing and/or correlating at least one of the following:

brake shoe mechanism force, brake cylinder pressure, slack adjuster data, brake shoe mechanism temperature, wheel temperature or any combination thereof.

25. A system for determining brake shoe effectiveness of a braking arrangement of a train during operation of the train, wherein the braking arrangement comprises at least one brake shoe mechanism configured to directly or indirectly contact at least one wheel of the train and retard rotation of the at least one wheel, the system comprising:

at least one sensor configured to measure or determine braking arrangement data comprising at least one of the following;

brake shoe mechanism force, brake cylinder pressure, slack adjuster data, brake shoe mechanism temperature, wheel temperature or any combination thereof;

at least one brake database comprising braking data including at least one of the following;

braking arrangement data, brake shoe force data, brake shoe friction data, brake application time data, brake application level data, brake retarding force data, brake shoe type data, brake thermal characteristics data, braking ratio data or any combination thereof;

at least one train database comprising train data including at least one of the following;

wheel data, rail data, train position data, car position data, train speed data, track data, track location data, track curvature data, track profile data, track grade data, train weight data, car weight data, train length data, car length data, environmental data, authority data or any combination thereof; and

a control system in communication with the at least one sensor, the at least one brake database and the at least one train database, the control system configured to dynamically determine brake shoe effectiveness data based upon the braking arrangement data, the braking data and the train data, the brake shoe effectiveness data comprising the ability of the braking arrangement to retard the train to a specified level.

26. A computer-implemented method for determining brake shoe effectiveness of a braking arrangement of a train during operation of the train, the method comprising:

determining braking data comprising at least one of the following;

braking arrangement data, brake shoe force data, brake shoe friction data, brake application time data, brake application level data, brake retarding force data, brake shoe type data, brake thermal characteristics data, braking ratio data or any combination thereof;

determining train data comprising at least one of the following;

wheel data, rail data, train position data, car position data, train speed data, track data, track location data, track curvature data, track profile data, track grade data, train weight data, car weight data, train length data, car length data, environmental data, authority data or any combination thereof; and

dynamically determining brake shoe effectiveness data based upon the braking data and the train data, the brake shoe effectiveness data comprising the ability of the braking arrangement to retard the train to a specified level.