TRANSVERSAL GENERATOR SET AND MODULAR DESIGN FOR REFURBISHMENT OF LOCOMOTIVES
A generator set has a transversal configuration on the locomotive. The generator set and its configuration on the platform offer good performance with respect to the space it occupies along the length of the locomotive platform deck, and offer better access for maintenance purposes. A walkway interface structure supports a modular design for locomotives using standardized major sub-assemblies that can be easily interfaced from one locomotive and under-frame to another.
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The present application claims the benefit, under 35 U.S.C. §119(e), of U.S. Provisional Application 60/929,286 entitled “Transversal Generator Set and Modular Design for Refurbishment of Locomotives” to Burns et al filed Jun. 20, 2007, which is incorporated herein by reference.
FIELD OF THE INVENTIONThe present invention generally relates to the refurbishment of train locomotives, or the like. More particularly, it relates to a transversal modular generator set to be installed on a locomotive during its refurbishment. The present invention also relates to a modular design concept which facilitates the refurbishment of locomotives through the use of a walkway interface system and standardized locomotive major sub-assemblies.
BACKGROUND OF THE INVENTIONRefurbishment of locomotive generator sets is carried out often these days as a cost-effective way for replacing older locomotives that may otherwise have other highly functional subsystems (such as traction motors, brakes, trucks and the undercarriage of the locomotive) that can still used over a period of several years with minor maintenance.
In older locomotives, sub-systems like the generator set (genset), air compressor, dynamic brake, etc. are directly applied to the locomotive platform. Consequently, for every refurbishment project and every platform generation, the interface between the sub-systems and the locomotive platform needs to be re-engineered. Normally, the genset package is oriented along the longitudinal axis of the locomotive.
In order to address spacing issues of gensets, Stauffer et al. have proposed in U.S. Pat. No. 6,230,667 and U.S. Pat. No. 5,908,011 a reduced-length engine generator assembly. The arrangement of components in these gensets permits an assembly with a shorter overall length, while avoiding any significant increase in height, thus facilitating installation aboard vehicles.
Furthermore, refurbishment of gensets on locomotives of different lengths is complicated due to the fact that, when longitudinal or side-by-side configurations are used, the actual design and layout of the gensets needs to be adapted to each and every new platform length. As illustrated in the following table, the platform lengths of locomotives vary significantly from one locomotive model to another:
There is a lack of standardization in the major sub-assemblies of the locomotive which often prevents the use or transfer of one sub-assembly from one particular locomotive and under-frame to another locomotive and under-frame. There is also a lack of standardization in common interface assemblies that could also be used for the transfer of one sub-assembly from one particular locomotive and under-frame to another locomotive and under-frame.
Thus, there is still presently a need for a locomotive generator set, as well as a configuration of the generator set on the locomotive, which can offer good performance with respect to the space it occupies along the length of the locomotive platform deck, and offer better access for maintenance purposes.
There is also a need for a modular design for locomotives using standardized major sub-assemblies that can be easily interfaced from one locomotive and under-frame to another.
SUMMARY OF THE INVENTIONAnother object of the present invention is to propose a layout for the generator set on the locomotive platform deck that satisfies another one of the above-mentioned needs.
Yet another object of the present invention is to provide a walkway interface system and standardized locomotive major sub-assemblies that satisfy another one of the above-mentioned needs.
According to the present invention, there is provided a locomotive comprising:
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- a platform deck; and
- a plurality of generator sets on the platform deck, each generator set occupying a space associated with a generally oblong footprint on the platform deck, the footprint defining a longitudinal axis along a longest length of the footprint,
wherein each generator set is positioned on the platform deck such that the longitudinal axis of the corresponding footprint is generally perpendicular to a direction of travel of the locomotive.
Preferably, the generator set comprises: - an engine generally oblong along an engine major axis;
- a fuel line supplying fuel to the engine through a fuel filter;
- an oil line supplying oil to the engine through an oil filter;
- an electrical subsystem connected to the engine comprising:
- an alternator driven by the engine, the alternator being generally oblong along an alternator major axis, the alternator major axis being generally parallel to the engine major axis; and
- a junction box for power management of the electrical subsystem and positioned on the first side of the alternator;
- an air passage supplying intake air to the engine through an air filter, the air filter being generally oblong along an air filter major axis, the air filter being positioned above the alternator and the air filter major axis being generally perpendicular to the alternator major axis;
- an exhaust pipe for removal of exhaust gases from the engine through a muffler, the muffler being generally oblong along a muffler major axis, the muffler being positioned above the engine, the muffler major axis being generally parallel to the engine major axis;
- a radiator system for cooling of the generator set and connected to the engine, the radiator system being positioned above the engine; and
- an operating panel for control of the generator set.
According to the present invention, there is also provided a walkway interface structure for supporting a locomotive sub-assembly on a locomotive platform having a platform width, the walkway interface structure comprising:
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- a base structure adapted to be removably placed on the locomotive platform, the base structure supporting the locomotive sub-assembly and having a base width substantially corresponding to the platform width; and
- at least one interface means traversing the base structure for operatively connecting the locomotive sub-assembly to another locomotive sub-system.
Preferably, the interface means comprises an element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
The transversal genset according to the present invention offers a better HP/linear feet ratio compared to most actual locomotives with their gensets aligned along the length of the locomotive. The present genset also offers better access for maintenance purposes with full access to all sides of the genset. The genset according to the present invention also simplifies hood designs, as much less doors are required for access to the genset. Furthermore, the present genset is designed to comply with an overall modularity and parametrization concept for locomotives.
The concept of a modular design consists of having standardized major sub-assemblies that can be easily interface from one locomotive and under-frame to another. The main benefits of this concept include:
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- Reduced engineering and drafting time for new locomotive orders
- Simplified Manufacturing
- Cost savings
- Quicker Time to Market
- Improved Reliability
- Reduction in Design Documentation
- Design Parameterization
The walkway interface structure according to the present invention provides a structure to be added over the full width of the platform and provides a number of pre-run cables and pipes to standardized locations on the locomotive. These types of interface structures, in combination with standardized sub-assemblies, including the gensets in accordance with the present invention, can be grouped together in different configurations to meet customer needs.
A non-restrictive description of preferred embodiments of the invention will now be given with reference to the appended drawings.
Referring to
As explained previously, this layout of the generator sets on the platform has a number of advantages. A comparison of this transversal configuration of gensets with respect to prior art configurations is illustrated schematically in
Referring to
Referring to
The electrical subsystem also comprises starting batteries 110 for startup of the engine 102 and positioned on a first side of the alternator 108. The electrical subsystem also comprises a junction box 112 for power management of the electrical subsystem and is positioned on the same first side of the alternator 108.
The generator set 100 further comprises an air passage supplying intake air to the engine 102 through an air filter 114, the air filter 114 being generally oblong along an air filter major axis, the air filter 114 being positioned above the alternator and the air filter major axis being generally perpendicular to the alternator major axis. The generator set 100 also comprises an exhaust pipe 116 for removal of exhaust gases from the engine 102 through a muffler 118, the muffler 118 being generally oblong along a muffler major axis, the muffler 118 being positioned above the engine 102, and the muffler major axis being generally parallel to the engine major axis. The generator set 100 also comprises a radiator system 120 for cooling of the generator set 100 and connected to the engine 102, the radiator system 120 being positioned above the engine. The generator set 100 also comprises an operating panel 122 for control of the generator set 100.
Preferably, each generator set (“genset”) has overall dimensions of 110″×48″×96″ and comprises a pair of rectangular radiators 124 with two fans or motors 126. The outline of the individual on
Preferably, the interface means comprises an element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
Preferably, as shown in
The modular design according to the present invention includes standardized sub-assemblies that can be grouped together in different configurations to fit customer needs:
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- Ex1: Block A+B+C+C+C+D for a standard 3 genset configuration on a GP9 platform
- Ex2: Block A+B+C+C+E+D for a 2 genset configuration on a longer platform
Every component needed to interface with the subsystem and the underdeck would be included in the walkway interface structure.
This mechanical modular design can undergo evolutionary steps. It also can be used with gensets positioned in longitudinal configurations and not only transversal configurations in accordance with the present invention. Typically, each walkway interface structure will be 120″ wide by 8″ high by a length “X” to be determined depending on the application. The walkway interface structure also has a number of interface means, including, but not limited to:
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- Traction motor cables (535) for up to 6 axles
- Genset power cables (4/0) for up to 4 gensets
- Dynamic brake power cables (4/0)
- All other small power wires (for air compressors, traction motor blowers, fans . . . )
- All control harnesses (lighting, sensors, can wire . . . )
- Fuel lines from fuel tank and to gensets (suction, returns)
- Drains from gensets (ecology, lube oil, coolant) and water collection drain
- Air brake piping lines
- Traction Motor Blowers ducting
Although the present invention has been explained hereinabove by way of preferred embodiments thereof, it should be understood that the invention is not limited to these precise embodiments and that various changes and modifications may be effected therein without departing from the scope or spirit of the invention.
Claims
1. A locomotive comprising: wherein each generator set is positioned on the platform deck such that the longitudinal axis of the corresponding footprint is generally perpendicular to a direction of travel of the locomotive.
- a platform deck; and
- a plurality of generator sets on the platform deck, each generator set occupying a space associated with a generally oblong footprint on the platform deck, the footprint defining a longitudinal axis along a longest length of the footprint,
2. The locomotive according to claim 1, wherein each of the plurality of generator sets comprises:
- an engine generally oblong along an engine major axis;
- a fuel line supplying fuel to the engine through a fuel filter;
- an oil line supplying oil to the engine through an oil filter;
- an electrical subsystem connected to the engine comprising: an alternator driven by the engine, the alternator being generally oblong along an alternator major axis, the alternator major axis being generally parallel to the engine major axis; and a junction box for power management of the electrical subsystem and positioned on the first side of the alternator;
- an air passage supplying intake air to the engine through an air filter, the air filter being generally oblong along an air filter major axis, the air filter being positioned above the alternator and the air filter major axis being generally perpendicular to the alternator major axis;
- an exhaust pipe for removal of exhaust gases from the engine through a muffler, the muffler being generally oblong along a muffler major axis, the muffler being positioned above the engine, the muffler major axis being generally parallel to the engine major axis;
- a radiator system for cooling of the generator set and connected to the engine, the radiator system being positioned above the engine; and
- an operating panel for control of the generator set.
3. A walkway interface structure for supporting a locomotive sub-assembly on a locomotive platform having a platform width, the walkway interface structure comprising:
- a base structure adapted to be removably placed on the locomotive platform, said base structure supporting the locomotive sub-assembly and having a base structure width substantially corresponding to the platform width; and
- at least one interface means traversing the base structure for operatively connecting the locomotive sub-assembly to another locomotive sub-system.
4. The walkway interface structure according to claim 3, wherein the at least one interface means comprises an element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
5. The walkway interface structure according to claim 3, further comprising connections for connecting to a further walkway interface structure, said further walkway interface structure supporting a further locomotive sub-assembly on the locomotive platform.
6. The walkway interface structure according to claim 5, wherein the connections comprise at least one connection element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
7. The walkway interface structure according to claim 5, wherein the base structure comprises at least one internal passageway through which the connections extend from a first extremity of the walkway interface structure to a second opposite extremity of the walkway interface structure.
8. The walkway interface structure according to claim 4, further comprising connections for connecting to a further walkway interface structure, said further walkway interface structure supporting a further locomotive sub-assembly on the locomotive platform.
9. The walkway interface structure according to claim 8, wherein the connections comprise at least one connection element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
10. The walkway interface structure according to claim 8, wherein the base structure comprises at least one internal passageway through which the connections extend from a first extremity of the walkway interface structure to a second opposite extremity of the walkway interface structure.
11. The walkway interface structure according to claim 9, wherein the base structure comprises at least one internal passageway through which the connections extend from a first extremity of the walkway interface structure to a second opposite extremity of the walkway interface structure.
12. A locomotive comprising a plurality of walkway interface structures as claimed in claim 3.
13. The locomotive according to claim 1, further comprising a plurality of walkway interface structures, each of said plurality of walkway interface structures supporting a corresponding one of the plurality of generator sets on the platform deck and comprising:
- a base structure adapted to be removably placed on the locomotive platform deck, said base structure supporting the corresponding generator set and having a base structure width substantially corresponding to the platform width; and
- at least one interface means traversing the base structure for operatively connecting the corresponding generator set to another locomotive sub-system.
14. The locomotive according to claim 2, further comprising a plurality of walkway interface structures, each of said plurality of walkway interface structures supporting a corresponding one of the plurality of generator sets on the platform deck and comprising:
- a base structure adapted to be removably placed on the locomotive platform deck, said base structure supporting the corresponding generator set and having a base structure width substantially corresponding to the platform width; and
- at least one interface means traversing the base structure for operatively connecting the corresponding generator set to another locomotive sub-system.
15. The locomotive according to claim 13, wherein the at least one interface means comprises an element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
16. The locomotive according to claim 15, wherein each of the plurality of walkway interface structures comprises connections for connecting to an adjacent walkway interface structure.
17. The locomotive according to claim 16, wherein the connections comprise at least one connection element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting.
18. The locomotive according to claim 16, wherein each base structure of a corresponding walkway interface structure comprises at least one internal passageway through which the connections extend from a first extremity of the corresponding walkway interface structure to a second opposite extremity of the corresponding walkway interface structure.
19. The locomotive according to claim 17, wherein each base structure of a corresponding walkway interface structure comprises at least one internal passageway through which the connections extend from a first extremity of the corresponding walkway interface structure to a second opposite extremity of the corresponding walkway interface structure.
20. The locomotive according to claim 14, wherein the at least one interface means comprises an element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting, wherein each of the plurality of walkway interface structures comprises connections for connecting to an adjacent walkway interface structure, wherein the connections comprise at least one connection element selected from the group consisting of traction motor cables, generator set power cables, dynamic brake power cables, power cables, power wires, control harnesses, fuel lines, drains, piping lines or ducting, and wherein each base structure of a corresponding walkway interface structure comprises at least one internal passageway through which the connections extend from a first extremity of the corresponding walkway interface structure to a second opposite extremity of the corresponding walkway interface structure.
Type: Application
Filed: Jun 20, 2008
Publication Date: Apr 23, 2009
Applicant: RAILPOWER TECHNOLOGIES CORP. (Brossard)
Inventors: Martin Burns (Chambly), Philippe Fusey (Varennes), Daniel Plourde (St-Constant), Michel Cousineau (Montreal)
Application Number: 12/143,390
International Classification: B61C 7/04 (20060101); B61D 17/00 (20060101);