CN100417793C - Locomotive engine restart shutdown override system and method - Google Patents
Locomotive engine restart shutdown override system and method Download PDFInfo
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- CN100417793C CN100417793C CNB2004800171601A CN200480017160A CN100417793C CN 100417793 C CN100417793 C CN 100417793C CN B2004800171601 A CNB2004800171601 A CN B2004800171601A CN 200480017160 A CN200480017160 A CN 200480017160A CN 100417793 C CN100417793 C CN 100417793C
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- engine
- water
- barrier film
- pressure
- protective gear
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Abstract
The present invention provides a system for overriding an EMD locomotive engine protective device (40) which includes a low water pressure sensing device (16) in communication with the engine cooling system for shutting down the engine when low water pressure in the engine is sensed, the override system comprising a water assist pump (20) connected to a source of water and communicating with the protective device (40) for supplying pressurized water to the low water pressure sensing device (16) to maintain relatively high water pressure to prevent the device (40) from shutting down the engine: and a controller for activating the water assist pump (20) during start up of the engine.
Description
The cross reference of related application
The application's invention requirement is based on the U.S. Provisional Application sequence number No.60/490 that submits on July 28th, 2003,624 preference.
Technical field
The present invention relates to EMD locomotive engine protective gear, and more particularly, relate to the condition that prevents of the device tripping operation that during computer-controlled automatic engine restarts, causes in the EMD locomotive engine.
The railway locomotive engine long time does not work, and generally closes when not using for a long time.Therefore if tail-off is long-time excessively, some locomotive system can be damaged, and exist to be designed to the automatic system that makes motor stop automatically and restart under the artificial situation of intervening not having.No matter motor is startup automatically or manually starts, and engine protection device is all arranged, and these engine protection devices are designed to some state in the detection of engine system between startup and on-stream period, and kill engine under certain conditions.Regrettably, particularly after the EMD locomotive engine cut out for a long time, this protective gear may detect the transient state when starting, and causes motor to be closed immediately once more.This situation has been eliminated the advantage of automatic engine startup/halt system (AESS), and may need manually to restart this motor by hindering protective gear.
A kind of engine protection device of (EMD) being made by the electric locomotive department (Electro-Motive Division) of General Motors is differential water and crankcase pressure detector system.This device monitoring engine-cooling system and crankcase pressure unusual.If detect potential harmful abnormal conditions, then kill engine.Sometimes when engine start, make this protective gear produce unnecessary tail-off because of transient state detected unusual (for example, lower coolant system pressure).In these EMD protective gears of being made by the electric locomotive department of General Motors, existing needs the qualified person to restart the manual reset device of motor, and this has usually eliminated the advantage of the AESS system on this motor.
Summary of the invention
Forbid temporarily when engine start when utilizing the AESS system that the system and method for the function of EMD engine protection device, the present invention have overcome above-mentioned shortcoming and difficulty about the EMD engine protection device by being provided at.
An aspect of of the present present invention provides a kind of override system of the EMD of obstruction locomotive engine protective gear, the locomotive engine protective gear comprises the low device for detecting water pressure that is communicated with engine-cooling system, during low hydraulic pressure in detecting motor, low device for detecting water pressure kills engine, this override system comprises: the water service pump, it is connected to the water source and is communicated with protective gear, be used for the water of pressurization is supplied to low device for detecting water pressure, keeping relative higher hydraulic pressure, thereby prevent that described device from killing engine; And the controller that is used for during engine start, activating the water service pump.Controller is preferably controlled the water service pump during the priming of motor and rotating crank, and can use with the AESS system.
Another aspect of the present invention provides a kind of override system of the EMD of obstruction locomotive engine protective gear, the locomotive engine protective gear comprises the first and second interconnective barrier films, one side of first barrier film is connected with the engine water delivery side of pump, and the opposition side of first barrier film is connected with the inlet of engine water pump, first side of second barrier film is connected with engine air tank, barrier film is moved passing under the differential pressure action of barrier film, when the pressure reduction that passes first barrier film becomes than the engine air tank pressure hour that acts on second barrier film, the low hydraulic pressure of indication EMD locomotive engine cooling system, this override system comprises: the water service pump, it is connected to the water source and is communicated with protective gear, is used for the water of pressurization is supplied to a side of first barrier film of engine protection device; And the controller that is used for during engine start, activating the water service pump.
Another aspect of the present invention comprises a kind of override method of the EMD of obstruction locomotive engine protective gear; the locomotive engine protective gear comprises the low device for detecting water pressure that is communicated with engine-cooling system; during low hydraulic pressure in detecting motor; low device for detecting water pressure kills engine; this override method comprises: during engine start; activate the water service pump that is communicated with engine-cooling system,, protective gear is not killed engine to provide hydraulic pressure to protective gear.This aspect also preferably includes the step that the water service pump is worked during the priming of motor and rotating crank.This method also preferably includes the activation step that adopts with the activation of automatic engine startup/halt system.
Description of drawings
Fig. 1 is the engine-cooling system and the perspective schematic view that comprises the element of the preferred embodiment of the present invention with EMD motor of AESS system;
Fig. 2 is the schematic representation of crankcase pressure state positive in the EMD motor;
Fig. 3 is the schematic representation of lower differential hydraulic pressure state;
Fig. 4 is the schematic representation of the system of activation graph 1 during the engine priming pattern;
Fig. 5 is the schematic representation of the system of activation graph 1 during engine rotation crank pattern; With
Fig. 6 is the sequential chart of connection and each element of cut-out system.
Embodiment
As shown in Figure 1, at EMD motor (not shown) duration of work, (for example, water tank 10) supply to motor by engine water pump 12 and water pipe 14 to water from the water source.Low device for detecting water pressure 16 is communicated with the water pipe 14 that is connected to motor, to detect the low water level state.Discuss more all sidedly as following, if detect may be harmful to motor the low water level state, then kill engine.In a preferred embodiment of the invention, be connected to water pipe and what be communicated with low device for detecting water pressure 16 is water service pump 20.This water service pump 20 is the motor-drive pumps that started/stopped the control of (AESS) system by automatic engine, and this AESS system is by controller 22 computerization.When pump 20 was activated, pump 20 was for example in the joint 15 of coming out from water tank 10, and the pipeline 24 of the inlet 26 by being connected to pump 20 draws water from water pipe 14.Then water is discharged to the supply line 30 that hangs down device for detecting water pressure from the outlet 28 of pump 20, and this will be described in greater detail below.
Referring now to Fig. 2, schematically showing with 40 of EMD low water level protective gear illustrates substantially.This EMD protective gear 40 is included in the many locomotives that are equipped with the EMD motor.42 places provide the outlet pressure of engine water pump; 44 places provide the inlet pressure of engine water pump; 46 places provide engine air tank pressure, and the oil inlet hole that comes self tuning regulator is at 48 places.Oil pressure relief valve 50 locked positions that are in shown in Figure 2 are shown in an open position in Fig. 3 or disengaged position.First barrier film 52 is between exit of pump pressure 42 and engine water pump inlet pressure 44.Second barrier film 54 is positioned at a side of air box pressure, and two barrier films interconnect, and makes the predetermined imbalance of the water-aspirator pressure of passing first barrier film 52 cause oil pressure relief valve 50 to be opened.
In the standard operation of low water level protective gear; when the differential pressure that passes engine water pump 12 becomes than air box pressure hour; oil pressure relief valve 50 is thrown off, and as shown in Figure 3, machine oil thereby make oil drain valve open and topple over from the low oil level detection device of engine controller (not shown).This regulator detects the low oil level of low oil level pressure and ato unit and cuts out.
In one embodiment of the invention, when water service pump 20 is activated, it is the engine water pump discharge pressure increase hydraulic pressure at 42 places, to prevent that this outlet pressure from excessively reducing, be reduced under the air box pressure to such an extent as to pass the pressure reduction of barrier film 52, thereby prevented that the low water level detection device from triggering and kill engine.
Usually, when AESS controller 22 activated automatic start-up routine, it rang 30 seconds and the loop of connection from battery to water service pump 20 alarm bell 60, and this loop makes pump 20 suction cooling waters and pressurizes to cooling system.The priming process continues 15 to 20 seconds.Then carry out engine rotation crank program.
According to the AESS program, motor is no more than 20 seconds with rotating crank.If motor starts up in the period at this section, then the AESS system will cut off water service pump 20.Under the situation that motor does not start, the AESS system will cut off water service pump 20, and after 2 minutes the repeated priming program.
Referring now to Figure 4 and 5, though the electrical connection of water service pump 20 can realize that these figure and following disclosure only illustrate such connected system as example with many modes.When AESS controller 22 activates the automatic engine start-up routine, it connects engine start relay 62, thereby is communicated with the loop that then turns back to local control circuit's circuit breaker 68 and battery switch from battery switch via the engine start relay 62 of the no-voltage relay 66 of local control circuit's circuit breaker 64, normally closed interlocking and interlocking to water service pump 20.
As shown in Figure 5, the priming time remaining is 15 to 20 seconds.Then carry out the program of engine rotation crank, as shown in Figure 5.During this program, except will activating engine start relay 62, also to activate engine start relay 70.The engine start relay 62 and 70 of interlocking is walked around manual control switch 72 and via thermal overload relay 74, fuel pump relay 76 and the second normally closed interlock relay 78 of interlocking, connects to start auxiliary contactor 80.Simultaneously, activate governor assist pump 82.Rotating crank continues 15 to 20 seconds.If engine start success, then relay 78 will disconnect and be opened to the loop of water service pump, governor assist pump 82 and startup auxiliary contactor 80, and AESS will cut off engine start relay 62 and 70 and crank setup relay 84.If motor does not start, then the AESS controller will cut off engine start relay 62 and 70, and after 2 minutes the repeated priming program.
According to the AESS program, motor is no more than 20 seconds with rotating crank.If motor starts in the period at this section, then the AESS system will cut off engine start relay 62 and 70 and crank setup relay 84.
Above sequencing form with Bar chart in Fig. 6 illustrate, to provide when various elements are in state of activation and non-state of activation has better understanding.Shown in Fig. 6 discal patch 90, preferably, water service pump 20 is being in the state of being activated during the engine priming He during the rotating crank.This makes pressure be formed on gradually in early days in the low hydraulic pressure protective gear 40 in start-up course.Shown in bar 92, be in the state of being activated when crank setup relay 84 stops in the AESS system and during the AESS priming He during the AESS rotating crank.Shown in bar 94, engine start relay 62 adhesive during AESS priming and rotating crank, shown in bar 96, only adhesive during rotating crank of engine start relay 70.
When introducing element of the present invention or parts or the preferred embodiments of the present invention, word " ", " one ", " being somebody's turn to do " and " described " mean and have one or more this elements or parts.Term " comprises ", " comprising " and " having " mean and comprise, and can also have other element or parts except listed.
Owing under the condition that does not depart from scope of the present invention, can do various modifications, therefore, comprise the content shown in superincumbent description or the accompanying drawing and will be construed to exemplary rather than restrictive implication to top embodiment.
Claims (10)
1. override system that hinders EMD locomotive engine protective gear (40); described locomotive engine protective gear (40) comprises the low device for detecting water pressure (16) that is connected with engine-cooling system; during low hydraulic pressure in detecting motor; described low device for detecting water pressure (16) kills engine, and described override system comprises:
Water service pump (20), it is connected to the water source and is connected with described protective gear (40), be used for will pressurization water supply to described low device for detecting water pressure (16), keeping relative higher hydraulic pressure, thereby prevent that described device (40) from killing engine; With
Controller (22), during engine start, it is used to activate described water service pump (20).
2. the system of claim 1, it uses with automatic engine startup/halt system (AESS).
3. the system of claim 1, wherein, described water service pump (20) is a motor-drive pump.
4. the system of claim 1, wherein, described controller (22) is controlled described water service pump (20) during the priming of motor and rotating crank.
5. the system of claim 4, it uses with automatic engine startup/halt system (AESS).
6. override system that hinders EMD locomotive engine protective gear (40); described locomotive engine protective gear (40) comprises the first and second interconnective barrier films; one side of described first barrier film (52) is connected with the outlet of engine water pump (12); and the opposition side of described first barrier film (52) is connected with the inlet (26) of described engine water pump; first side of described second barrier film (54) is connected with engine air tank; make described barrier film move passing under the differential pressure action of described barrier film; when the power on described first barrier film of acting on because of the pressure reduction that passes described first barrier film (52) becomes than being applied to power hour on described second barrier film by acting on engine air tank pressure on described second barrier film (54); low hydraulic pressure in the indication EMD locomotive engine cooling system, described override system comprises:
Water service pump (20), it is connected to the water source and is connected with described protective gear (40), is used for the water of pressurization is supplied to a side of first barrier film (52) of described engine protection device (40); With
Controller (22), during engine start, it is used to activate described water service pump (20).
7. override method that hinders EMD locomotive engine protective gear (40); described locomotive engine protective gear (40) comprises the low device for detecting water pressure (16) that is connected with engine-cooling system; during low hydraulic pressure in detecting motor; described low device for detecting water pressure (16) kills engine, and described override method comprises:
During engine start, activate the water service pump (20) that is connected with described engine-cooling system, provide hydraulic pressure, described protective gear (40) is not killed engine to give described protective gear (40).
8. the method for claim 7, wherein, described activation step adopts with the activation of automatic engine startup/halt system (AESS).
9. the method for claim 7, wherein, described water service pump (20) is worked during the priming of motor and rotating crank.
10. the method for claim 7, wherein, described activation step adopts with the activation of automatic engine startup/halt system.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49062403P | 2003-07-28 | 2003-07-28 | |
| US60/490,624 | 2003-07-28 | ||
| US10/878,758 | 2004-06-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1809690A CN1809690A (en) | 2006-07-26 |
| CN100417793C true CN100417793C (en) | 2008-09-10 |
Family
ID=36840950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800171601A Expired - Fee Related CN100417793C (en) | 2003-07-28 | 2004-07-13 | Locomotive engine restart shutdown override system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100417793C (en) |
| ZA (1) | ZA200601227B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7383445B2 (en) * | 2019-10-14 | 2023-11-20 | ボッシュ株式会社 | Exhaust purification device and control method for the exhaust purification device |
| CN113982764B (en) * | 2021-11-10 | 2023-09-08 | 中国煤炭科工集团太原研究院有限公司 | Gas-electricity double-control high-temperature flameout protection device of electric control explosion-proof engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265567A (en) * | 1992-06-05 | 1993-11-30 | Ztr Control Systems | EMD locomotive engine protective devices override for use during autostart procedure |
-
2004
- 2004-07-13 CN CNB2004800171601A patent/CN100417793C/en not_active Expired - Fee Related
-
2006
- 2006-02-10 ZA ZA200601227A patent/ZA200601227B/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265567A (en) * | 1992-06-05 | 1993-11-30 | Ztr Control Systems | EMD locomotive engine protective devices override for use during autostart procedure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1809690A (en) | 2006-07-26 |
| ZA200601227B (en) | 2007-05-30 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20080910 |