Locomotive engine charge air cooling system and method for cooling the engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01P-005/10
F01P-005/00
F01P-001/06
F01P-001/00
출원번호
US-0005701
(2004-12-06)
발명자
/ 주소
Hedrick,John C.
Fritz,Steven G.
출원인 / 주소
Southwest Research Institute
대리인 / 주소
Gunn &
인용정보
피인용 횟수 :
3인용 특허 :
5
초록▼
A locomotive engine having an engine cooling system, a compressor for compressing engine intake air, and an aftercooler for cooling the compressed intake air prior to introduction into an intake manifold of the engine. The locomotive also has a dynamic brake system that includes a dynamic brake grid
A locomotive engine having an engine cooling system, a compressor for compressing engine intake air, and an aftercooler for cooling the compressed intake air prior to introduction into an intake manifold of the engine. The locomotive also has a dynamic brake system that includes a dynamic brake grid and one or more cooling fans. The engine cooling system includes an engine cooling circuit having coolant passages internally disposed in the engine, and a radiator and radiator fans configured to receive coolant exiting the engine and return cooled coolant to the engine. An enhanced aftercooler cooling circuit is disposed in fluid communication with the engine cooling circuit and includes a heat exchanger arranged to receive coolant exiting the engine coolant passages, cool the coolant passing therethrough, and return cooled coolant to the aftercooler. The heat exchanger is advantageously positioned in a manner whereby the dynamic brake grid cooling fan is operatively associated with both the dynamic brake grid and the heat exchanger.
대표청구항▼
What is claimed is: 1. An engine cooling system for a locomotive having an engine equipped with a compressor for compressing engine intake air, an aftercooler for cooling the compressed engine intake air, and a dynamic braking system having a dynamic brake grid and at least one cooling fan position
What is claimed is: 1. An engine cooling system for a locomotive having an engine equipped with a compressor for compressing engine intake air, an aftercooler for cooling the compressed engine intake air, and a dynamic braking system having a dynamic brake grid and at least one cooling fan positioned in fluid-thermal communication with the dynamic brake grid, said engine cooling system comprising: an engine cooling circuit having coolant passages in the engine and a radiator configured to receive coolant exiting the engine and return cooled coolant to the engine; and an aftercooler cooling circuit having a coolant-to-air heat exchanger disposed in fluid-thermal communication with said at least one dynamic brake grid cooling fan such that said brake grid cooling fan is operatively associated with both the dynamic brake grid and the heat exchanger, a heat exchanger coolant supply conduit providing fluid communication between said engine and the heat exchanger, a heat exchanger coolant return conduit providing fluid communication between said heat exchanger and the aftercooler, and an aftercooler fluid conduit configured to pass coolant exiting the aftercooler to said engine cooling circuit. 2. The engine cooling system, as set forth in claim 1, wherein said engine cooling circuit includes a pump operatively positioned to direct coolant to the engine cooling circuit and to the aftercooler cooling circuit. 3. The engine cooling system, as set forth in claim 2, wherein said pump is an engine driven pump adapted to circulate coolant water through said engine cooling circuit and the aftercooler cooling circuit. 4. The engine cooling system, as set forth in claim 1, wherein said engine cooling circuit includes a water dump valve adapted to drain said engine cooling circuit and said aftercooler cooling circuit of coolant water upon indication of a preselected water temperature. 5. The engine cooling system, as set forth in claim 1, wherein said aftercooler cooling circuit is a retrofit installation on the locomotive. 6. The engine cooling system, as set forth in claim 1, wherein said heat exchanger is positioned relative to the dynamic brake grid and the cooling fan such that the cooling fan is operable to draw ambient air past said heat exchanger and the dynamic brake grid effect convective heat transfer therewith. 7. The engine cooling system, as set forth in claim 1, wherein the locomotive includes an air intake hatch disposed in fluid communication with ambient air and positioned relative to the cooling fan and the dynamic brake grid so as to define a flow path interconnecting the intake hatch, the dynamic brake grid and the cooling fan, said heat exchanger being positioned in the flow path intermediate the air intake hatch and the cooling fan such that operation of the cooling fan draws ambient air through the intake hatch, the heat exchanger and the dynamic brake grid. 8. A diesel-electric locomotive, comprising a diesel engine having a turborcharger for compressing intake air, an aftercooler for cooling the intake air, and a cooling system for cooling said engine and said aftercooler; a dynamic brake system including a dynamic brake grid and at least one cooling fan positioned for fluid thermal communication with said dynamic brake grid, wherein said cooling system includes; an engine cooling circuit having coolant passages in the engine and a radiator configured to receive coolant water exiting the engine and returning cooled coolant water to the engine; and an aftercooler cooling circuit disposed in fluid communication with said engine cooling circuit and having a coolant-to-air heat exchanger positioned to cool coolant water upstream of said aftercooler, wherein said heat exchanger is positioned for fluid-thermal communication with said dynamic brake grid cooling fan such that said cooling fan is operatively associated with both the dynamic brake grid and said heat exchanger. 9. The locomotive, as set forth in claim 8, wherein said engine cooling circuit includes a pump operatively positioned to direct coolant water from said radiator to said engine cooling circuit and to said aftercooler cooling circuit. 10. The locomotive, as set forth in claim 9, wherein said pump is an engine driven pump adapted to circulate coolant water through said engine cooling circuit and said aftercooler cooling circuit. 11. The locomotive, as set forth in claim 8, wherein said engine cooling circuit includes a water dump valve adapted to drain said engine cooling circuit of coolant water upon indication of a preselected water temperature, said aftercooler cooling circuit being positioned higher than said water dump valve such that said water dump valve is operable to drain said aftercooler cooling circuit upon said indication of a preselected water temperature. 12. The locomotive, as set forth in claim 8, wherein said aftercooler cooling circuit is a retrofit installation on said engine and said engine cooling circuit is an existing installation. 13. The locomotive, as set forth in claim 8, wherein said locomotive has an air intake hatch disposed in fluid communication with ambient air and positioned relative to said cooling fan and said dynamic brake grid so as to define a flow path interconnecting said air intake hatch, said dynamic brake grid, and said cooling fan, said heat exchanger being positioned in said flow path intermediate said air intake hatch and said cooling fan such that operation of said cooling fan draws ambient air through said air intake hatch and through said heat exchanger. 14. The locomotive, as set forth in claim 8, wherein said aftercooler cooling circuit includes a coolant supply conduit extending from said engine to said heat exchanger and a coolant return conduit extending from said heat exchanger to said aftercooler. 15. A method of cooling an engine of a locomotive having an engine and a dynamic brake electrical load dissipation system, said engine having a turbocharger arranged to compress intake air and an aftercooler adapted to cool the compressed air, said dynamic brake electrical load dissipation system having a dynamic brake grid and at least one cooling fan positioned for fluid-thermal communication with the dynamic brake grid, said method comprising: positioning a heat exchanger in thermal-fluid communication with the cooling fan of the dynamic brake electrical load dissipation system; providing an engine cooling circuit that includes a radiator and coolant passages in the engine; passing coolant water from the radiator to the coolant passages in the engine and then into an inlet port of the heat exchanger; passing the coolant water through the heat exchanger while the cooling fan is operating, such that ambient air is drawn through the heat exchanger, thereby cooling the passing coolant water; passing the cooled coolant water from the heat exchanger and into the aftercooler, whereby the compressed intake air passing through the aftercooler from the turbocharger is cooled prior to introduction of the compressed intake air into the engine; passing the coolant water from the aftercooler into the coolant passages in the engine, thereby returning the coolant water into the engine cooling circuit; and passing the coolant water through the radiator after the coolant water passes through the coolant passages of the engine. 16. The method, as set forth in claim 15, wherein said method comprises re-circulating the coolant water through the engine cooling circuit and the heat exchanger. 17. The method, as set forth in claim 15, wherein said step of passing coolant water from the radiator to the engine includes operating a pump operatively positioned to direct coolant water from the radiator through the engine coolant passages, the heat exchanger and the aftercooler. 18. The method of claim 15, wherein the step of passing coolant water through the heat exchanger is performed while the dynamic brake cooling fan is operating and the dynamic brake electrical load dissipation system is idle. 19. The method, as set forth in claim 18, wherein the step of passing coolant water through the heat exchanger is performed while the dynamic brake grid cooling fan draws ambient air through the dynamic brake grid and the heat exchanger. 20. The method, as set forth in claim 15, wherein the step of passing coolant water through the heat exchanger includes reducing the temperature of the passing coolant water by at least from about fifty to eighty-five degrees Fahrenheit. 21. The method, as set forth in claim 20, wherein said step of passing coolant water through the heat exchanger reduces the temperature of the passing coolant water to within about twenty to thirty degrees above an ambient temperature. 22. A method for retrofitting a locomotive to provide an aftercooler cooling circuit, said locomotive having an engine equipped with an engine cooling system having internally disposed coolant passages in the engine, a turbocharger, an aftercooler in fluid communication with the engine cooling system, and a dynamic brake system having a dynamic brake grid and at least one cooling fan positioned in fluid-thermal communication with the dynamic brake grid, said method comprising; positioning a heat exchanger in fluid-thermal communication with the cooling fan of the dynamic brake system, such that the cooling fan draws ambient air past the dynamic brake grid and the heat exchanger; connecting a coolant outlet port from the engine coolant passages to a coolant supply port of the heat exchanger whereby coolant exiting the engine is directed into the heat exchanger; connecting a coolant return port of the heat exchanger with the aftercooler, whereby cooled coolant water exiting the heat exchanger is directed into the aftercooler and then into the engine cooling system. 23. The method, as set forth in claim 22, wherein the locomotive includes a louvered air intake hatch through which ambient air is drawn, the dynamic brake grid being positioned between the louvered air intake hatch and the cooling fan, and said positioning the heat exchanger includes positioning the heat exchanger between the louvered air intake hatch and the dynamic brake grid. 24. The method, as set forth in claim 23, wherein said positioning the heat exchanger includes enlarging the louvered air intake hatch to accommodate the heat exchanger.
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이 특허에 인용된 특허 (5)
Dinger Hans (Friedrichshafen DEX) Deutschmann Herbert (Friedrichshafen DEX), Charging air heat-exchanger installation.
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