System and method for computing car switching solutions in a switchyard using car ETA as a factor

• US 7,742,849 B2
• Filed: 03/23/2006
• Issued: 06/22/2010
• 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, Muinonen, Kari, Barker, Matthew
• Primary Examiner(s): To; Tuan C
• Application Number:
  US11/387,370
• Publication Number:
  US 20070156302A1
• Time in Patent Office: 1,552 Days
• Field of Search: 701/19, 701/20, 246/176, 246/1.C, 246/2.S, 246/14, 246/26, 246/95, 246/98, 246/162, 246/220, 246/226, 246/239, 246/415.R, 246/476, 104/26.1, 104/130.01, 104/302, 104/303, 703/8
• 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 method for switching railcars in a railway switchyard, wherein the railway switchyard includes, a switching queue containing a plurality of railcars awaiting to be switched, a plurality of classification tracks and a switch for switching railcars in the switching queue to the classification tracks, the method including:

i. determining space available for receiving railcars from a train block in individual ones of the classification tracks, the determining being performed by using a computer programmed to perform the determining wherein;

1. the train block includes a plurality of railcars and at least one of the railcars is enroute to the railway switch yard at a time the determining is performed;

2. the at least one of the railcars being characterized by an expected time of arrival (ETA), the ETA providing an estimate of the time at which the at least one railcar is expected to be present in the railway switchyard;

3. the determining includes inputting in the computer first data indicative of the ETA and processing the first data with the computer to generate second data, the second data indicative of the space available for receiving railcars from the first train block;

ii. selecting a classification track amongst the plurality of classification tracks at least in part on the basis of the second data;

iii. switching railcars from the train block in the selected classification track.

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

3. A method as defined in claim 2, wherein the switching queue includes a track section that direct railcars to travel over a hump of the hump switch yard.

4. A method as defined in claim 3, including allowing railway cars in the track section to travel down the hump by gravity toward the switch.

5. A method as defined in claim 4, wherein the railway switch yard includes a departure track.

6. A method as defined in claim 5, wherein one or more of the classification tracks connect with the departure track to allow railcars in a classification track to travel to the departure track.

9. A method as defined in claim 1, wherein the the plurality of classification trans include a first classification track and the train block is a first train block, the determining including determining if the first classification track has enough space to receive the first train block in its entirety.

10. A method as defined in claim 9, wherein the first classification track holds cars from a second train block, different from the first train block, when the determining is performed.

11. A method as defined in claim 10, wherein the first train block and the second train block belong to different departure trains.

12. A method as defined in claim 11, wherein the second train block is characterized by a pull time, the pull time being indicative of a time at which the second train block will vacate the first classification track, the determining including supplying data to the computer conveying the pull time and processing with the computer the data conveying the pull time.

7. A method as defined in 6, including using the computer to determine an expected switch time in relation to one of the railcars of the train block, the expected switch time being indicative of an approximate time at which the one of he railcars of the rain block is expected to be switched by the switch.

8. A method as defined in claim 7, wherein the train block belongs to a first departure train, the selected classification track includes railcars from a train block that belongs to second departure train that is different from the first departure train.

13. A method for switching railcars in a railway switchyard, wherein the railway switchyard includes, a switching queue containing a plurality of railcars awaiting to be switched, a set of classification tracks and a switch for switching railcars in the switching queue to the classification tracks, the method comprising:

i. determining by using a computer programmed to perform the determining if any one of the classification tracks would have enough space for receiving a train block in its entirety, the train block including a plurality of railcars and at least one of the railcars being enroute to the railway switch yard at the time the determining is performed, the determining including;

1. inputting in the computer time data, the time data providing an estimate of the time at which the at least one railcar is expected to be present at the railway switchyard;

2. processing with the computer the time data to determine if any one of the classification tracks would have enough space to receive the train block in its entirety when all railcars of the train block have been switched by the switch, the processing being performed while the at least one railcar is enroute;

ii. switching railcars from the train block in a classification track identified by the determining to have enough space to receive the train block in its entirety.

14. A method as defined in claim 13, wherein the train block is a first train block, the determining including processing with the computer the time data to determine if a particular classification track among the plurality of classification tracks that already holds a second train block would have enough space to receive railcars from the first train block, the first train block and the second train block being associated with different departure trains.

15. A method as defined in claim 14, including inputting in the computer pull time data, the pull time data being indicative of a time at which the second train block is expected to vacate the particular classification track, the method including processing the pull time data to determine if the particular classification track would have enough space to receive the first train block in its entirety.

16. A method as defined in claim 13, including computing expected switching time data, the expected switching time data being indicative of a time at which a particular railcar of the train block is expected to be at the switch.

17. A method for switching railcars in a railway switchyard, wherein the railway switchyard includes, a switching queue containing a plurality of railcars awaiting to be switched, a set of classification tracks and a switch for switching railcars in the switching queue to the classification tracks, the method comprising:

i. determining by using a computer programmed to perform the determining if any one of the classification tracks would have enough space for receiving a train block in its entirety, the train block including a plurality of railcars and at least one of the railcars being enroute to the railway switch yard at the time the determining is performed, the determining including;

1. inputting in the computer time data, the time data providing an estimate of the time at which at least one railcar of the train block is expected to be present at the railway switchyard;

2. processing with the computer the time data to;

1. determine if any one of the classification tracks of the set of classification tracks would have enough space to receive the train block in its entirety when all railcars of the train block have been switched by the switch;

2. selecting a classification track from the set of classification tracks to receive the train block at least in part on the basis of the determining;

ii. outputting from the computer data conveying the selected classification track;

iii. switching railcars of the train block from the switching queue into the selected classification track.

18. A method for switching railcars as defined in claim 17, wherein the train block is a first train block, the determining including processing with the computer time data to determine if a particular classification track among the plurality of classification tracks that already holds cars from a second train block would have enough space to receive railcars from the first train block, the first train block and the second train block being associated to different departure trains.

19. A method as defined in claim 18, including inputting in the computer pull time data, the pull time data being indicative of a time at which railcars from the second train block are expected to vacate the particular classification track, the method including processing with the computer the pull time data to determine if the particular classification track would have enough space to receive the first train block in its entirety.

20. A method as defined in claim 17, including computing with the computer expected switching time data, the expected switching time data being indicative of a time at which a railcar of the train block is expected to be at the switch.

21. A method as defined in claim 18, including inputting in the computer arrival profile data, the arrival profile data being associated with railcars from the first train block, the method including processing with the computer the arrival profile data to determine if the particular classification track would have enough space to receive the first train block in its entirety.