System and method for computing rail car switching solutions in a switchyard including logic to re-switch cars for block pull time

• US 7,885,736 B2
• Filed: 05/12/2010
• Issued: 02/08/2011
• Est. Priority Date: 12/30/2005
• Status: Active Grant

• Current Assignee: Canadian National Railway Company
• Original Assignee: Canadian National Railway Company
• Inventors: Morency, Vincent, Pathak, Anshu, Doyle, Gordon, Muinonen, Kari, Barker, Matthew
• Primary Examiner(s): Black; Thomas G
• Assistant Examiner(s): Chen; Shelley
• Application Number:
  US12/778,356
• Publication Number:
  US 20100228410A1
• Time in Patent Office: 272 Days
• Field of Search: 701/19
• US Class Current: 701/19
• CPC Class Codes: B61L 17/00 Switching systems for classification yards

Abstract

A system for computing car switching solutions in a railway switch yard. The system is computer based and has an input for receiving data conveying information about one or more arrival trains arriving at the switch yard and data conveying information about departure trains to depart the switch yard. A processing entity processes the data and computes car switching solutions for the railcars.

Claims

1. A system for selecting a location in a railway switch yard in which to switch cars from a train block, the railway switch yard having a switch, a reswitching track and classification tracks, the reswitching track defining a path for recirculating cars from a position downstream the switch to a position upstream the switch, said system comprising:

i. a data processing apparatus having a CPU and a machine readable storage encoded with software for execution by the CPU;

ii. processing with the software first data conveying information about an expected pull time of the train block, the pull time being indicative of an approximate time at which the train block is expected to vacate a classification track in which the train block is to be eventually switched, to perform a selection between the reswitching track and the classification tracks in which to switch cars of the train block;

iii. the data processing apparatus having an output for releasing second data conveying results of the selection.

2. A system as defined in claim 1, wherein the data processing apparatus computes an expected switch time for one or more cars of the train block, the expected switch time for a particular car of the train block being indicative of an approximate time at which the particular car is expected at the switch.

3. A system as defined in claim 2, wherein the data processing apparatus uses the computed expected switch time of the particular car as a factor during the selection between the reswitching track and the classification tracks.

4. A system as defined in claim 1, wherein the data processing apparatus computing available space in several ones of the classification tracks to determine which classification track can receive the train block.

5. A system as defined in claim 4, wherein the data processing apparatus performs the selection by using the computed available space as a factor.

6. A system as defined in claim 1, wherein the data processing apparatus selects the reswitching track in which to switch a car of the train block when the first data indicates that the pull time of the train block would occur after a lapse of a predetermined time period from an expected switch time of the car, the expected switch time being indicative of an approximate time at which the car is expected at the switch.

7. A system as defined in claim 1, wherein the data processing apparatus selects the classification tracks in which to switch a car of the train block when the first data indicates that the pull time of the train block would occur before a lapse of a predetermined time period from an expected switch time of the car, the expected switch time being indicative of an approximate time at which the car is expected at the switch.

8. A system as defined in claim 1, wherein the data processing apparatus performs the selection while one or more cars of the train block are yet to arrive at the railway switch yard.

9. A system as defined in claim 1, wherein the data processing apparatus processes with the software third data indicative of an ETA at the railway switch yard of one or more cars of the train block to perform the selection.

10. A system as defined in claim 1, wherein the data processing apparatus has an input for receiving the first data.

11. A system as defined in claim 1, wherein the railway switch yard is a hump yard.

12. A system as defined in claim 1, wherein the railway switch yard is a flat yard.

13. A railway switch yard, comprising:

a. a switch;

b. a reswitching track defining a path for recirculating cars from a position downstream the switch to a position upstream the switch;

c. a plurality of classification tracks;

d. a data processing apparatus for selecting between the reswitching track and the classification tracks in which cars of a train block are to be switched;

1. the data processing apparatus having a CPU and a machine readable storage encoded with software for execution by the CPU;

2. the data processing apparatus processing with the software first data conveying information about an expected pull time of the train block, the pull time being indicative of an approximate time at which the train block is expected to vacate a classification track in which the train block is to be eventually switched via the switch, to perform a selection between the reswitching track and the classification tracks in which to switch cars of the train block;

3. the data processing apparatus having an output for releasing second data conveying results of the selection.

14. A railway switch yard as defined in claim 13, wherein the data processing apparatus computes an expected switch time for one or more cars of the train block, the expected switch time for a particular car of the train block being indicative of an approximate time at which the particular car is expected at the switch.

15. A railway switch yard as defined in claim 13, wherein the data processing apparatus uses the computed expected switch time of the particular car as a factor during the selection between the reswitching track and the classification tracks.

16. A railway switch yard as defined in claim 13, wherein the data processing apparatus computing available space in several ones of the classification tracks to determine which classification track can receive the train block.

17. A railway switch yard as defined in claim 16, wherein the data processing apparatus performs the selection by using the computed available space as a factor.

18. A railway switch yard as defined in claim 13, wherein the data processing apparatus selects the reswitching track to switch a car of the train block when the first data indicates that the pull time of the train block would occur after a lapse of a predetermined time period from an expected switch time of the car, the expected switch time being indicative of an approximate time at which the car is expected at the switch.

19. A railway switch yard as defined in claim 13, wherein the data processing apparatus selects the classification tracks to switch a car of the train block when the first data indicates that the pull time of the train block would occur before a lapse of a predetermined time period from an expected switch time of the car, the expected switch time being indicative of an approximate time at which the car is expected at the switch.

20. A railway switch yard as defined in claim 13, wherein the data processing apparatus performs the selection while one or more cars of the train block are yet to arrive at the railway switch yard.

21. A railway switch yard as defined in claim 13, wherein the data processing apparatus processes with the software third data indicative of an ETA at the railway switch yard of one or more cars of the train block to perform the selection.

22. A railway switch yard as defined in claim 13, wherein the data processing apparatus has an input for receiving the first data.

23. A railway switch yard as defined in claim 13, wherein the railway switch yard is a hump yard.

24. A railway switch yard as defined in claim 13, wherein the railway switch yard is a flat yard.

25. A railway switch yard as defined in claim 13, wherein the output is connected to the switch, the switch being responsive to the second data to switch cars in accordance with results of the selection.