CN113865875A - Engine bench testing system capable of automatically switching various fuels and control method - Google Patents
Engine bench testing system capable of automatically switching various fuels and control method Download PDFInfo
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- CN113865875A CN113865875A CN202111022006.5A CN202111022006A CN113865875A CN 113865875 A CN113865875 A CN 113865875A CN 202111022006 A CN202111022006 A CN 202111022006A CN 113865875 A CN113865875 A CN 113865875A
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- 239000000446 fuel Substances 0.000 title claims abstract description 267
- 238000012360 testing method Methods 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 411
- 239000000295 fuel oil Substances 0.000 claims abstract description 98
- 210000001503 joint Anatomy 0.000 claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 16
- 238000009423 ventilation Methods 0.000 claims description 49
- 230000001502 supplementing effect Effects 0.000 claims description 39
- 238000003032 molecular docking Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 17
- 238000011084 recovery Methods 0.000 claims description 15
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 230000009471 action Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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Abstract
The invention provides an engine bench test system capable of automatically switching various fuels and a control method thereof, wherein the test system comprises: at least two fuel oil supply systems connected in parallel; the fuel consumption testing device is used for operatively communicating each fuel supply system with the fuel consumption testing device; the oil replenishing pump is arranged between each fuel supply system and the oil consumption testing device; an oil inlet of the fuel oil constant temperature system is provided with an oil supply pump, and a second oil outlet of the oil consumption testing device is connected with the oil supply pump; a multi-way valve including a controllable passage corresponding to each fuel supply system, each controllable passage being in operable communication with the fuel thermostat system; the first end of the engine fuel butt joint device is connected with the engine, and the second end of the engine fuel butt joint device is connected with the multi-way valve; and the first end of the fuel oil pump is also connected with each corresponding fuel oil supply system; the test system is provided with a compressed air vent interface to evacuate fuel. The invention can realize the automatic switching of gasoline with different brands; and the accuracy and the reliability of the engine energy consumption test are ensured.
Description
Technical Field
The invention relates to the technical field of engine testing, in particular to an engine bench testing system capable of automatically switching multiple fuels and a control method.
Background
At present, when the energy consumption of engines is tested by various domestic large host plants and engine laboratories, the following three fuel supply systems are generally adopted:
the first mode is as follows: a small-sized oil tank of about 200L or an oil depot is adopted for supplying oil, the 200L oil tank is connected with an engine sequentially through a primary filtering oil storage tank, a filter, an oil consumption instrument, an engine oil supply pump and an oil pressure regulator, and a manual oil drain valve is arranged on the primary filtering oil storage tank and is convenient for emptying; the oil consumption liquid oil supplementing pump is connected with the oil consumption instrument and used for supplementing oil to the oil consumption instrument, for the fuel supply system adopting the mode, when fuel oil of different types needs to be switched, on one hand, the problem that the previously tested fuel oil is difficult to recover exists, on the other hand, the previously tested fuel oil needs to be removed through a manual oil drain valve during model changing, the fuel oil switching time is long, the fuel oil in a pipeline is difficult to clean, and workers inevitably contact the gasoline to influence the health and have potential safety risks;
the second mode is as follows: the fuel oil supply systems adopting the two first modes are used for respectively storing the fuel oil with different signals, and the arrangement can meet the requirement of the purity of the fuel oil during switching, but the two fuel oil supply systems are required to be arranged, so that the overall cost is high, and the risk of manual switching misoperation also exists;
and in the third mode, a plurality of small-sized about 200L oil tanks or oil depots are adopted, manual switching valves corresponding to the number of the oil tanks or the oil depots are arranged between each small-sized about 200L oil tank or oil depots and the primary filtering oil storage tank on the basis of the first mode, when different types of fuel oil need to be switched, only the corresponding manual switching valves need to be operated, but in the mode, when different types of fuel oil need to be switched, the former type of fuel oil in a pipeline still needs to be cleaned, time and labor are wasted, and in addition, the situation that the health is influenced due to the fact that workers inevitably contact the gasoline exists, and potential safety risks exist.
Therefore, an engine pedestal test system for automatically switching various fuels is urgently needed, and can realize automatic switching of gasoline with different brands; and the system can empty gasoline of different brands, so that no gasoline residue in the pipeline is ensured, and the accuracy and reliability of the engine energy consumption test are ensured.
Disclosure of Invention
In order to solve the problems, the invention provides an engine pedestal test system for automatically switching various fuels and a control method thereof, which can realize the automatic switching of gasoline with different brands; and the system can empty gasoline of different brands, so that no gasoline residue in the pipeline is ensured, and the accuracy and reliability of the engine energy consumption test are ensured.
In order to achieve the above object, the present invention provides an engine bench test system for automatic switching of multiple fuels, comprising:
the fuel supply systems are connected in parallel and used for supplying fuel of different models;
the oil consumption testing device is used for testing the fuel consumption of the engine under each working condition and is provided with a first oil outlet and a second oil outlet;
the oil replenishing pump is arranged between an oil outlet of each path of the fuel supply system and an oil inlet of the fuel consumption testing device and is used for replenishing fuel to the fuel consumption testing device;
the oil inlet of the fuel oil constant temperature system is provided with an oil supply pump, and a second oil outlet of the oil consumption testing device is connected with the oil supply pump; the first oil outlet of the oil consumption testing device is connected with the oil supply pump through an air separator;
a multi-way valve comprising a controllable channel corresponding to each said fuel supply system, each controllable channel being in operable communication with an oil outlet of said fuel thermostatic system;
the first end of the engine fuel oil butt joint device is connected with an oil inlet of an engine to be tested, and the second end of the engine fuel oil butt joint device is connected with an oil outlet of the multi-way valve; the first end of the fuel oil pump is also connected with each corresponding fuel oil supply system and is used for draining the fuel oil in the engine;
a first switching valve is arranged between the oil supplementing pump and the oil consumption testing device, and is also provided with an oil return port which is operatively communicated with an oil inlet of each path of fuel supply system;
and a first compressed air ventilation interface is also arranged between the oil outlet of each path of fuel supply system and the oil supplementing pump and is used for communicating compressed air to discharge fuel oil in the oil supplementing pump and the oil consumption testing device, a pipeline connected with the oil supplementing pump and the oil consumption testing device and fuel oil in devices in a pipeline circulation path.
As a further improvement of the above scheme, a second compressed air ventilation interface is further arranged at a second oil outlet of the oil consumption testing device, and is used for communicating compressed air to discharge fuel oil in a pipeline communicated with the second oil outlet and a device in a pipeline circulation path;
as a further improvement of the above scheme, a third compressed air ventilation interface is further arranged between the multi-way valve and the engine fuel docking device, and is used for communicating compressed air to discharge fuel in the flow path of the oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel docking device.
As a further improvement of the above scheme, the fuel supply system comprises an oil storage tank, an oil inlet of the oil storage tank is communicated with a corresponding oil depot through a normally open pneumatic ball valve, and a first filter and an oil inlet normally closed pneumatic ball valve are further arranged between the normally open pneumatic ball valve and the oil inlet of the oil storage tank; a fuel evaporation and recovery device is arranged at an oil inlet of the oil storage tank; and a normally closed pneumatic valve is arranged at an oil outlet of the oil storage tank.
As a further improvement of the scheme, the oil storage tank is also connected with the fuel vapor recovery device through a pressure balance pipe.
As a further improvement of the scheme, a second filter is arranged between the oil replenishing pump and an oil outlet of the fuel supply system.
As a further improvement of the scheme, the first end of the engine fuel butt joint device is also connected with the oil inlet of each corresponding fuel supply system through a second switching valve.
As a further improvement of the scheme, a third filter is further arranged at the oil inlet of the oil supply pump.
As a further improvement of the scheme, a temperature detection device is further arranged between the fuel oil constant temperature system and the multi-way valve, and the temperature detection device is in communication connection with the fuel oil constant temperature system and is used for detecting the fuel oil supply temperature and feeding the fuel oil temperature back to the fuel oil constant temperature system so as to keep the fuel oil temperature constant.
As a further improvement of the above scheme, a pressure detection device is further arranged between the multi-way valve and the engine fuel butt joint device, and the pressure detection device is in communication connection with the fuel supply pump and is used for detecting the fuel pressure between the engine and the fuel supply pump and feeding the fuel pressure back to the fuel supply pump to maintain the fuel pressure in a set interval.
As a further improvement of the above scheme, the engine fuel butt joint device includes a quick butt joint plate and a fuel rail interface connected to the engine, the quick butt joint plate is provided with an oil inlet and an oil outlet, the oil inlet on the quick butt joint plate is communicated with the fuel rail interface for supplying fuel to the sender, and the oil outlet on the quick butt joint plate is communicated with the fuel rail interface for draining the fuel in the engine; and the oil outlet on the quick butt joint plate, the second switching valve and the corresponding connecting pipeline form an oil discharge channel of the engine.
The invention also provides a control method of the engine bench test system for automatically switching the various fuels, which comprises the following steps:
s1: closing an oil return passage where the second switching valve corresponds to the fuel model, and connecting compressed air at a third compressed air ventilation interface to perform air tightness inspection on the fuel supply system corresponding to the test model and each pipeline connected with the engine; if the air tightness is qualified, closing compressed air at a third compressed air ventilation interface, simultaneously opening an oil return passage where a second switching valve is corresponding to the fuel type, and discharging the compressed air in the engine rack test system through a corresponding oil storage tank;
s2: closing an oil return passage where the second switching valve corresponds to the fuel type; then filling fuel oil into an oil storage tank of the corresponding fuel oil supply system, opening a corresponding valve, an oil supplementing pump, a fuel consumption testing device and an oil supply pump, simultaneously switching the multi-way valve to a controllable channel with a corresponding model, and supplying the fuel oil with the corresponding model to the engine to be detected to perform fuel consumption testing;
s3: after oil consumption tests under various working conditions are finished, an oil return passage where the corresponding model of the second switching valve is located is opened, an oil return port of the first switching valve is opened, a first compressed air ventilation interface between an oil outlet of a fuel supply system of the corresponding test model and an oil supplementing pump is opened, compressed air is communicated to discharge fuel oil in the oil supplementing pump, the oil consumption test device, a pipeline connected with the oil supplementing pump and the oil consumption test device and fuel oil in devices in a pipeline circulation path, part of the fuel oil flows back to an oil storage tank of the corresponding model through the oil return passage where the second switching valve is located under the action of the compressed air, and part of the fuel oil in the oil consumption test device returns to an air separator through the first oil outlet under the action of self gravity;
s4: opening a second compressed air ventilation interface from a second oil outlet of the oil consumption testing device, communicating compressed air to discharge fuel oil in a pipeline communicated with the second oil outlet and a device in a pipeline circulation path, returning the fuel oil in the oil consumption testing device to the air separator through the first oil outlet again under the action of the compressed air to be emptied, gradually emptying the fuel oil in the pipeline communicated with the second oil outlet and the device in the pipeline circulation path to a corresponding controllable channel in the multi-way valve, and returning the fuel oil to a corresponding oil storage tank through an oil return port of a corresponding model of a second switching valve;
s5: opening a third compressed air ventilation interface between the multi-way valve and the engine fuel butt joint device, communicating compressed air to discharge fuel in a flow path of an oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel butt joint device, and under the action of compressed air, returning the fuel to a corresponding oil storage tank through an oil return port of a corresponding type of the second switching valve to finish the evacuation of the first fuel type;
s6: and for the test of the subsequent fuel models, repeating the steps S1-S5, wherein the controllable channels in the first switching valve, the second switching valve and the multi-way valve are required to be switched to oil ports or channels of corresponding models.
It should be noted that, corresponding pneumatic ball valves or manual ball valves are arranged at the oil inlets and/or the oil outlets of the devices in the whole test system according to the actual operation requirements to control the communication or the blocking of the oil passages of the corresponding devices.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention provides an engine pedestal test system capable of automatically switching various fuels, which comprises at least two paths of fuel supply systems connected in parallel and used for supplying fuels with different models; the oil consumption testing device is provided with a first oil outlet and a second oil outlet; the oil replenishing pump is arranged between an oil outlet of each path of the fuel supply system and an oil inlet of the oil consumption testing device; the oil inlet of the fuel oil constant temperature system is provided with an oil supply pump, and a second oil outlet of the oil consumption testing device is connected with the oil supply pump; the first oil outlet of the oil consumption testing device is connected with the oil supply pump through an air separator; a multi-way valve comprising a controllable channel corresponding to each said fuel supply system, each controllable channel being in operable communication with an oil outlet of said fuel thermostatic system; the first end of the engine fuel oil butt joint device is connected with an oil inlet of an engine to be tested, and the second end of the engine fuel oil butt joint device is connected with an oil outlet of the multi-way valve; the first end of the fuel oil pump is also connected with each corresponding fuel oil supply system and is used for draining the fuel oil in the engine; a first switching valve is arranged between the oil supplementing pump and the oil consumption testing device, and is also provided with an oil return port which is operatively communicated with an oil inlet of each path of fuel supply system; a first compressed air ventilation interface is also arranged between the oil outlet of each path of fuel supply system and the oil supplementing pump and is used for communicating compressed air to discharge fuel oil in the oil supplementing pump and the oil consumption testing device, a pipeline connected with the oil supplementing pump and the oil consumption testing device and fuel oil in devices in a pipeline circulation path; the second oil outlet of the oil consumption testing device is also provided with a second compressed air ventilation interface which is used for communicating compressed air to discharge fuel oil in a pipeline communicated with the second oil outlet and a device in a pipeline circulation path; a third compressed air ventilation interface is further arranged between the multi-way valve and the engine fuel butt joint device and used for communicating compressed air to discharge fuel in the circulation path of the oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel butt joint device; and a third compressed air ventilation interface is also arranged between the multi-way valve and the engine fuel butt joint device and is used for communicating compressed air to discharge fuel in the circulation path of the oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel butt joint device. The fuel supply systems of different models are connected in parallel, and corresponding switching valves or corresponding controllable channels are arranged at nodes corresponding to the fuel models, so that the automatic switching of gasoline of different brands is realized; tests prove that the low-grade gasoline is mixed in the high-grade gasoline, and the mixed gasoline can generate knocking in the testing process when being used in a gasoline engine needing the high-grade gasoline; mix the petrol of high grade in the test process that needs to use the engine of low grade, the tail gas pollution of production can rise, consequently, to this test system, when switching different grades petrol, it is especially important to the evacuation of last type fuel, be the key of guaranteeing the fuel purity, also guarantee the assurance of engine oil consumption test accuracy and security, for this reason, in this test system, through setting up three compressed air access point, carry out the omnidirectional evacuation to the device and the pipeline of different positions in the system, with the interior no last fuel residue of assurance pipeline, thereby guarantee the accuracy and the reliability of engine energy consumption test.
2. The invention provides an engine pedestal test system capable of automatically switching various fuels, the oil outlets or oil outlets of all detection devices of the whole test system are provided with corresponding control opening pneumatic ball valves or switching valves to control the communication or blocking of oil passages, so that the automatic operation of the whole test system is realized, the operation of workers is greatly reduced, the labor intensity of the workers is reduced on one hand, the chances of the workers contacting fuel oil are reduced on the other hand, in addition, a fuel evaporation and recovery device is arranged at an oil inlet of an oil storage tank in the corresponding fuel supply system and used for recovering the evaporated fuel, therefore, the harm of fuel evaporation to the surrounding environment is reduced, and the environmental protection performance of the test system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a schematic diagram of an oil circuit principle of an engine bench test system for automatic switching of various fuels, which is disclosed by the invention;
reference numerals:
1. oil supply of an oil depot; 1.1, oil supply of an oil depot; 2. a normally open pneumatic ball valve; 2.1, normally opening a pneumatic ball valve; 3. a first filter; 3.1, a first filter; 4. an oil inlet normally closed pneumatic ball valve; 4.1, feeding oil into a normally closed pneumatic ball valve; 5. an oil storage tank; 5.1, an oil storage tank; 6. a pneumatic valve; 6.1, a pneumatic valve; 7. a first compressed air vent interface; 8. a pneumatic valve; 9. a pressure balance tube; 10. a second filter; 11. an oil replenishing pump; 12. a first switching valve; 13. a three-channel two-way valve; 14. a pneumatic ball valve; 15. a pneumatic ball valve; 16. a fuel consumption testing device; 17. a fuel overflow tank; 18. a second compressed air vent interface; 19. a three-channel two-way valve; 20. a pneumatic ball valve; 21. a pneumatic ball valve; 22. a pneumatic ball valve; 23. a third filter; 24. a pressure sensor; 25. a supply pump; 26. a fuel oil constant temperature system; 27. a temperature detection device; 28. a three-channel two-way valve; 29. an oil pressure regulator; 29.1, oil pressure regulator; 30. a one-way valve; 30.1, a one-way valve; 31. a pneumatic ball valve; 32. a third compressed air vent interface; 34. a pneumatic valve; 35. a pressure sensor; 36. a quick butt plate; 37. a three-way joint; 38. a fuel rail interface; 39. a pneumatic valve; 40. a second switching valve; 41. a fuel evaporation and recovery device; 44. a three-channel two-way valve; 44.1, a three-channel two-way valve; 45. an air separator; 54. engine
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators such as the first, second, upper, lower, left, right, front and rear … … in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention will be further described with reference to the following figures:
example 1:
referring to fig. 1, the present invention provides an engine bench test system for automatic switching of various fuels, comprising:
the fuel supply systems are connected in parallel and used for supplying fuel of different models;
the fuel consumption testing device 16 is used for testing the fuel consumption of the engine under each working condition, and is provided with a first fuel outlet and a second fuel outlet;
the oil supplementing pump 11 is arranged between an oil outlet of each path of the fuel supply system and an oil inlet of the fuel consumption testing device 16, and is used for supplementing fuel to the fuel consumption testing device 16;
an oil inlet of the fuel oil constant temperature system 26 is provided with an oil supply pump 25, and a second oil outlet of the oil consumption testing device 16 is connected with the oil supply pump 25; a first oil outlet of the oil consumption testing device 16 is connected with the oil supply pump 25 through an air separator 45;
a multi-way valve comprising a controllable passage corresponding to each of said fuel supply systems, each controllable passage being in operable communication with an outlet port of said fuel thermostatic system 26;
the first end of the engine fuel oil butt joint device is connected with an oil inlet of an engine to be tested, and the second end of the engine fuel oil butt joint device is connected with an oil outlet of the multi-way valve; the first end of the fuel oil pump is also connected with each corresponding fuel oil supply system and is used for draining the fuel oil in the engine;
a first switching valve 12 is arranged between the oil supplementing pump 11 and the oil consumption testing device 16, and the first switching valve 12 is also provided with an oil return port which is operatively communicated with an oil inlet of each path of fuel supply system;
a first compressed air ventilation interface 7 is further arranged between the oil outlet of each path of fuel supply system and the oil supplementing pump 11 and is used for communicating compressed air to discharge fuel in the oil supplementing pump 11 and the oil consumption testing device 16, and fuel in pipelines connected with the oil supplementing pump 11 and the oil consumption testing device 16 and devices in pipeline circulation paths; compressed air is introduced into the first compressed air ventilation interface 7: the first is to drain the fuel at the 5/5.1 oil outlet of the oil storage tank and the pipeline connected with the oil outlet; secondly, in order to empty the fuel in the fuel consumption testing device 16; thirdly, in order to empty the fuel in the pipeline after the fuel consumption testing device 16;
a second compressed air ventilation interface 18 is further arranged at a second oil outlet of the oil consumption testing device 16 and is used for communicating compressed air to discharge fuel oil in a pipeline communicated with the second oil outlet and a device in a pipeline circulation path;
and a third compressed air ventilation interface 32 is also arranged between the multi-way valve and the engine fuel butt joint device and is used for communicating compressed air so as to discharge fuel in a circulation path of an oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel butt joint device.
In the embodiment, two paths of fuel supply systems connected in parallel are arranged, wherein two different types of fuel are supplied, each path of fuel supply system comprises an oil storage tank 5/5.1, an oil inlet of the oil storage tank 5/5.1 is communicated with a corresponding oil depot 1/1.1 through a normally open pneumatic ball valve 2/2.1, and a first filter 3/3.1 and an oil inlet normally closed pneumatic ball valve 4/4.4 are further arranged between the normally open pneumatic ball valve 2/2.1 and the oil inlet of the oil storage tank 5/5.1; and a fuel evaporation and recovery device 41 is arranged at the oil inlet of the oil storage tank 5/5.1; an oil outlet of the oil storage tank 5/5.1 is provided with a normally closed pneumatic valve 6/6.1; two controllable channels are arranged in the corresponding multi-way valve and are used for the operable communication of fuel oil of corresponding models; two passages are also provided at the corresponding first switching valve 12 for operable communication of the corresponding type of fuel. The fuel supply systems of different models are connected in parallel, and corresponding switching valves or corresponding controllable channels are arranged at nodes corresponding to the fuel models, so that the automatic switching of gasoline of different brands is realized; in the embodiment, three compressed air access points are arranged to evacuate devices and pipelines at different positions in the system in an all-around manner, so that the condition that no fuel oil is left in the pipeline is ensured, and the accuracy and the reliability of the engine energy consumption test are ensured.
In this embodiment, the reservoir 5/5.1 is used to store fuel and to hold the fuel so that air bubbles in the fuel are released and fuel density is maintained. The oil storage tank is provided with 4 position sensors which are respectively a gasoline low liquid level protection shutdown liquid level, a gasoline low liquid level oil supplementing liquid level, a gasoline high liquid level oil supplementing stopping liquid level and a gasoline high liquid level forced oil supplementing stopping liquid level; in addition, a manual oil drain valve is also arranged on the oil storage tank 5/5.1 and is used for equipment maintenance; the oil storage tank 5/5.1 is also connected with a fuel vapor recovery device 41 through a pressure balance pipe 9, and the arrangement of the pressure balance pipe 9 ensures that the oil consumption testing device 16, the oil storage tanks 5 and 5.1 and the atmospheric pressure are kept consistent.
In this embodiment, 2L of fuel is stored in the fuel consumption testing device 16, and in the engine testing stage, the fuel consumption under each working condition is tested; when the liquid level sensor inside the fuel consumption meter reaches a low liquid level and a high liquid level, the execution basis of opening (working) or closing (stopping) is provided for the oil replenishing pump 11 and the automatic cut-off valve of the first switching valve 12. The oil consumption testing device 16 is further provided with a third oil outlet, the third oil outlet is connected with a fuel overflow tank 17, and the fuel overflow tank 17 is used for collecting fuel overflowing from the oil consumption testing device 16; on the other hand, the fuel overflow tank is vented to atmosphere, so that the pressure balance in the fuel consumption testing device 16 is ensured.
The charge pump 25 provides a desired fuel pressure at the engine 54 and the charge pump 25 in the present test system can provide a pressure of 10 Bar.
As a preferred embodiment, a second filter 10 is further disposed between the oil replenishing pump 11 and an oil outlet of the fuel supply system, and the second filter 10 cooperates with the first filter 3/3.1 to filter the supplied fuel, so as to ensure the cleanliness of the fuel supplied to the oil replenishing pump and the fuel consumption testing device.
As a preferred embodiment, the first end of the engine fuel docking device is further connected to an oil inlet of each corresponding fuel supply system through a second switching valve 40, in this embodiment, the second switching valve 40 is a three-channel two-way valve, and includes two oil outlets, and the two oil outlets are respectively connected to oil inlets of oil storage tanks of the corresponding fuel supply systems, and are used for recovering fuel of corresponding models; and a pneumatic valve 39 is also arranged between the engine fuel oil butt joint device and the oil inlet of the three-channel two-way valve and is used for controlling the on-off of the oil return passage.
In a preferred embodiment, a third filter 23 is further arranged at the oil inlet of the oil supply pump 25, and the third filter 23 is arranged to filter the fuel entering the fuel constant temperature system 26 again to ensure the cleanliness of the fuel, so as to ensure the cleanliness of the fuel finally entering the test engine 54 to ensure the accuracy of the test result of the engine 54.
In a preferred embodiment, a temperature detecting device 27 is further disposed between the fuel oil constant temperature system 26 and the multi-way valve, and the temperature detecting device 27 is in communication connection with the fuel oil constant temperature system 26 and is used for detecting the fuel oil temperature and feeding the fuel oil temperature back to the fuel oil constant temperature system 26 to keep the fuel oil temperature constant.
In a preferred embodiment, a pressure detection device 35 is further arranged between the multi-way valve and the engine fuel docking device, and the pressure detection device 35 is in communication connection with the fuel supply pump 25 and is used for detecting the fuel pressure between the engine 54 and the fuel supply pump 25 and feeding the fuel pressure back to the fuel supply pump 25 to maintain the fuel pressure within a set interval; in this embodiment, the pressure detecting device 35 is a pressure sensor, and when the pressure sensor detects that the fuel pressure exceeds the set range, the fuel supply pump 25 stops supplying fuel to protect the engine 54 and related devices.
As a preferred embodiment, the fuel docking device of the engine includes a quick docking plate 36 and a fuel rail interface 38 connected to the engine, the quick docking plate is provided with an oil inlet and an oil outlet, the oil inlet on the quick docking plate 36 is communicated with the fuel rail interface 38 for supplying fuel to the engine 54, and the oil outlet on the quick docking plate 36 is communicated with the fuel rail interface 38 for draining the fuel in the engine 54; the oil outlet on the quick butt joint plate 36, the second switching valve 40 and the corresponding connecting pipeline form an oil discharge channel of the engine; in this embodiment the fuel rail interface is connected to a three-way connection 37.
Example 2:
the invention also provides a control method of the engine bench test system for automatically switching the various fuels, which comprises the following steps:
s1: closing an oil return passage where the second switching valve 40 corresponds to the fuel type, and connecting compressed air to the third compressed air ventilation interface 32 to perform air tightness inspection on the fuel supply system corresponding to the test type and each pipeline connected with the engine; if the air tightness is qualified, the compressed air at the third compressed air ventilation interface 32 is closed, meanwhile, an oil return passage where the second switching valve 40 is corresponding to the fuel model is opened, and the compressed air in the engine rack test system is discharged through the corresponding oil storage tank 5/5.1;
s2: closing an oil return passage where the second switching valve 40 corresponds to the fuel type; then fuel oil is filled into an oil storage tank of the corresponding fuel oil supply system, the corresponding valve, the oil supplementing pump 11, the oil consumption testing device 16 and the oil supply pump are opened, meanwhile, the multi-way valve is switched to the controllable channel of the corresponding model, and the fuel oil of the corresponding model is supplied to the engine to be detected to perform oil consumption testing;
s3: after oil consumption tests under various working conditions are finished, an oil return passage where the model corresponding to the second switching valve 40 is located is opened, an oil return port of the model corresponding to the first switching valve 12 is opened, a first compressed air ventilation interface 7 between an oil outlet of a fuel supply system of the model corresponding to the test model and an oil replenishing pump is opened, compressed air is communicated to discharge fuel in the oil replenishing pump 11, the oil consumption test device 16, a pipeline connected with the oil replenishing pump 11 and the oil consumption test device 16 and fuel in devices in a pipeline circulation path, part of the fuel flows back to an oil storage tank of the model corresponding through an oil return passage where the second switching valve 40 is located under the action of compressed air, and part of the fuel in the oil consumption test device 16 returns to an air separator 45 through a first oil outlet under the action of self gravity;
s4: the second compressed air ventilation interface 18 from the second oil outlet of the oil consumption testing device 16 is opened, compressed air is communicated to discharge fuel oil in a pipeline communicated with the second oil outlet and a device in a pipeline circulation path, under the action of the compressed air, the fuel oil in the oil consumption testing device 16 returns to the air separator 45 through the first oil outlet again and is emptied, the fuel oil in the pipeline communicated with the second oil outlet and the device in the pipeline circulation path is gradually emptied to a corresponding controllable channel in the multi-way valve, and flows back to a corresponding oil storage tank through an oil return port of a corresponding model of the second switching valve 40;
s5: opening a third compressed air ventilation interface 32 between the multi-way valve and the engine fuel butt joint device, and communicating compressed air to discharge fuel in a flow path of an oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel butt joint device, wherein under the action of the compressed air, the fuel flows back to a corresponding oil storage tank through an oil return port of a corresponding type of the second switching valve 40 to finish the evacuation of the first fuel type;
s6: for the test of the subsequent fuel model, the steps S1-S5 are repeated, and in the process, the controllable channels in the first switching valve 12, the second switching valve 40 and the multi-way valve need to be switched to the oil ports or channels of the corresponding model.
It should be noted that, corresponding pneumatic ball valves or manual ball valves are arranged at the oil inlets and/or the oil outlets of the devices in the whole test system according to the actual operation requirements to control the communication or the blocking of the oil passages of the corresponding devices.
With particular reference to figure 1 of the drawings,
1. the airtightness checking path diagram of the 92# and 95# fuel oil in the embodiment is as follows:
the pneumatic ball valve 31 at the oil outlet of the multi-way valve is closed, the pneumatic valve 39 on the oil return passage where the second switching valve corresponds to the fuel type is closed, the fuel rail interface 38 is in a closed state because the engine is not running, at the moment, compressed air is connected to the third compressed air ventilation interface 32, and when the air pressure of the compressed air reaches 5bar, the pneumatic valve 34 for controlling the on-off of the third compressed air ventilation is closed; at this time, the airtightness between the pneumatic valve 34, the pressure detecting device 35 between the multi-way valve and the engine fuel docking device, the quick docking plate 36, the three-way joint 37 connected to the fuel rail interface, the fuel rail interface 38, and the pneumatic valve 39 and the related pipes is detected.
2. After checking the gas tightness of No. 92 gasoline, exhausting air:
after the air tightness check is completed, the compressed air in the pneumatic valve 34, the pressure detection device 35, the quick docking plate 36, the three-way joint 37, the fuel rail interface 38 and the pneumatic valve 39 pipeline reaches a No. 92 oil storage tank by opening the pneumatic valve 39 and a BC channel in the first switching valve, and is finally discharged to the atmosphere through a fuel vapor recovery device;
3. the working path of the 92# fuel supply is as follows:
when the No. 92 fuel is normally supplied, the fuel flow path is as follows: pneumatic valve 6 at oil outlet of No. 92 fuel oil storage tank 5-No. 92 fuel oil storage tank, second filter 10, oil supplementing pump 11, first switching valve 12, oil supplementing pump 11, pneumatic ball valve 14 between oil supplementing pump 11 and oil consumption testing device 16, three-channel two-way valve 19 at second compressed air ventilation interface (BA direction), pneumatic ball valve 22, third filter 23, pressure sensor 24, supply pump 25, fuel oil constant temperature system 26, temperature detection device 27, three-channel two-way valve (BA direction) 28 at oil inlet of multi-way valve, three-channel two-way valve 44 in controllable channel in multi-way valve, oil pressure regulator 29 in controllable channel in multi-way valve, check valve 30 in controllable channel in multi-way valve, pneumatic ball valve 31, pressure sensor 35, butt joint quick plate 36, three-way joint 37, and fuel rail joint Port 38-motor 54; at this point, the engine 54 is finished fueling; meanwhile, a pneumatic valve 6.1 at an oil outlet of the 95# oil storage tank needs to be closed, a pneumatic valve 8 for controlling the on-off of a first compressed air ventilation interface, a three-channel two-way valve 13(BA direction) for conducting the 95# oil storage tank, a pneumatic ball valve 15 between an oil inlet of the oil consumption testing device 16 and a first oil outlet, an air inlet C of a three-channel two-way valve 19 at a second compressed air ventilation interface, a pneumatic valve 34 for controlling the on-off of a third compressed air ventilation interface and a pneumatic valve 39;
4. the timing chart of the steps of changing the 95# fuel oil into the 92# fuel oil is as follows:
a type-change emptying 1: opening a first compressed air ventilation interface 7, an air-operated valve 8, a second filter 10, an oil supplementing pump 11, a first switching valve 12, a three-channel two-way valve 13(BA direction) for conducting the 95# oil storage tank, an oil inlet of the 95# oil storage tank 5.1, a pressure balancing pipe 9 and a fuel vapor recovery device 41, wherein the air-operated valve 6 at the oil outlet of the 92# oil storage tank and the air-operated valve 6.1 at the oil outlet of the 95# oil storage tank are in a closed state;
b, model-changing evacuation 2-evacuation oil consumption meter: opening a first compressed air vent interface 7, an air-operated valve 8, a second filter 10, an oil supplementing pump 11, a first switching valve 12, an air-operated valve 14, an oil consumption testing device 16, a three-channel two-way valve 19(BA direction) at a second compressed air vent interface (or an air-operated ball valve 20, an air-operated ball valve 21, an air separator 45, an air-operated ball valve 22, a third filter 23, a pressure sensor 24, a supply pump 25, a fuel constant temperature system 26, a temperature detection device 27, a three-channel two-way valve (BA direction) 28 at an oil inlet of a multi-way valve, a three-channel two-way valve 44 in a controllable channel in the multi-way valve, an oil pressure regulator 29 in the controllable channel in the multi-way valve, a one-way valve 30 in the controllable channel in the multi-way valve, an air-operated ball valve 31, a pressure sensor 35 and a quick pair The connecting plate 36, the three-way joint 37, the pneumatic valve 39, the three-channel two-way valve 40(BA direction) at the first switching valve, the No. 92 oil storage tank 5, the pressure balancing pipe 9 and the fuel vapor recovery device 41 are arranged; the pneumatic valve 6 at the oil outlet of the No. 92 oil storage tank and the pneumatic valve 6.1 at the oil outlet of the No. 95 oil storage tank are in a closed state, the pneumatic ball valve 15 is in a closed state, the pneumatic valve 34 for controlling the ventilation of the third compressed air is in a closed state, and the pneumatic valve 38 is in a closed state;
c. model changing and emptying 3-emptying pipeline: opening a first compressed air vent interface 7, an air-operated valve 8, a second filter 10, an oil supplementing pump 11, a first switching valve 12, an air-operated valve 14, an air-operated ball valve 15, an air-operated ball valve 21, an air separator 45, an air-operated ball valve 22, a third filter 23, a pressure sensor 24, a supply pump 25, a fuel oil constant temperature system 26, a temperature detection device 27, a three-channel two-way valve (BA direction) 28 at an oil inlet of a multi-way valve, a three-channel two-way valve 44 in a controllable channel in the multi-way valve, an oil pressure regulator 29 in the controllable channel in the multi-way valve, a one-way valve 30 in the controllable channel in the multi-way valve, the air-operated ball valve 31, the pressure sensor 35, a quick butt joint plate 36, a three-way joint 37, the air-operated valve 39, a three-channel two-way valve 40(BA direction) at the first switching valve, a No. 92# oil storage tank 5, and a pressure sensor Balance pipe 9-fuel vapor recovery unit 41; the pneumatic valve 6 at the oil outlet of the 92# oil storage tank and the pneumatic valve 6.1 at the oil outlet of the 95# oil storage tank are in a closed state, the three-channel two-way valve 19 at the second compressed air ventilation interface and the pneumatic ball valve 20 at the second oil outlet of the oil consumption testing device 16 are in a closed state, the pneumatic valve 34 for controlling the third compressed air ventilation is in a closed state, and the pneumatic valve 38 is in a closed state;
d. model change evacuation 4 evacuation air separator: opening a first compressed air vent interface 7, an air-operated valve 8, a second filter 10, an oil supplementing pump 11, a first switching valve 12, an air-operated valve 14, an air-operated ball valve 15, an air-operated ball valve 21, an air separator 45, a three-channel two-way valve 44.1 in a controllable channel in a multi-way valve, an oil pressure regulator 29.1 in the controllable channel in the multi-way valve, a one-way valve 30.1 in the controllable channel in the multi-way valve, an air-operated ball valve 31, a pressure sensor 35, a quick butt joint plate 36, a three-way joint 37, an air-operated valve 39, a three-channel two-way valve 40(BA direction) -92# oil storage tank 5-a pressure balance pipe 9-a fuel vapor recovery device 41; the pneumatic valve 6 at the oil outlet of the 92# oil storage tank and the pneumatic valve 6.1 at the oil outlet of the 95# oil storage tank are in a closed state, the three-channel two-way valve 19 at the second compressed air ventilation interface, the pneumatic ball valve 20 at the second oil outlet of the oil consumption testing device 16 and the pneumatic ball valve 22 are in a closed state, the pneumatic valve 34 for controlling the third compressed air ventilation is in a closed state, and the pneumatic valve 38 is in a closed state;
e. model-changing evacuation 5 evacuation pipe compressed air 2: opening a three-channel two-way valve 19-a pneumatic ball valve 22-a third filter 23-a pressure sensor 24-a supply pump 25-a fuel oil constant temperature system 26-a temperature detection device 27-a three-channel two-way valve (BA direction) 28 at an oil inlet of a multi-way valve-a three-channel two-way valve 44 in a controllable channel in the multi-way valve-an oil pressure regulator 29 in a controllable channel in the multi-way valve-a one-way valve 30 in a controllable channel in the multi-way valve-a pneumatic ball valve 31-a pressure sensor 35-a quick butt plate 36-a three-way joint 37-a pneumatic valve 39-a three-channel two-way valve 40(BA direction) -a No. 92 oil storage tank 5-a pressure balance pipe 9-a fuel vapor recovery device 41 at a second compressed air ventilation interface 18-a second compressed air ventilation interface; wherein the pneumatic ball valve 21, the three-way two-way valve 44.1 in the multi-way valve and the pneumatic valve 34 for controlling the ventilation of the third compressed air are in a closed state;
f. model-changing evacuation 6 evacuation pipeline compressed air 3: opening a third compressed air ventilation interface 18, an air-operated valve 34, a pressure sensor 35, a quick butt plate 36, a three-way joint 37, an air-operated valve 39, a three-channel two-way valve 40(BA direction) -92# oil storage tank 5-a pressure balance pipe 9-a fuel vapor recovery device 41 at a first switching valve; wherein the pneumatic ball valve 31 is in a closed state; the 92# fuel oil of the whole test system is exhausted;
5. filling and operating 95# fuel oil;
95# fuel supply time working path: the 95# normal oil supply trend is as follows: pneumatic valve 6.1 at the oil outlet of 95# fuel oil storage tank 5.1-95# fuel oil storage tank, second filter 10, oil supplementing pump 11, first switching valve 12, oil supplementing pump 11, pneumatic ball valve 14 between oil supplementing pump 11 and oil consumption testing device 16, three-channel two-way valve 19 at second compressed air ventilation interface (BA direction), pneumatic ball valve 22, third filter 23, pressure sensor 24, supply pump 25, fuel thermostatic system 26, temperature detecting device 27, three-channel two-way valve at oil inlet of multi-way valve (BA direction) 28, three-channel two-way valve 44 in controllable channel in multi-way valve, oil pressure regulator 29 in controllable channel in multi-way valve, one-way valve 30 in controllable channel in multi-way valve, pneumatic ball valve 31, pressure sensor 35, quick butt plate 36, three-way joint 37 and fuel rail joint Port 38-motor 54; at this point, the engine 54 is finished fueling; meanwhile, the pneumatic valve 6 at the oil outlet of the 92# oil storage tank, the pneumatic valve 8 for controlling the on-off of the first compressed air ventilation interface, the three-channel two-way valve 13(BC direction) for conducting the 92# oil storage tank, the pneumatic ball valve 15 between the oil inlet of the oil consumption testing device 16 and the first oil outlet, the air inlet C of the three-channel two-way valve 19 at the second compressed air ventilation interface, the pneumatic valve 34 for controlling the on-off of the third compressed air ventilation interface and the pneumatic valve 39 are required to be closed; finishing switching of 95# fuel; it should be noted that the process of changing the 92# fuel into the 95# fuel is opposite to the process of changing the 95# fuel into the 92# fuel, and the description is omitted.
The foregoing is a detailed description of the invention, and specific examples are used herein to explain the principles and implementations of the invention, the above description being merely intended to facilitate an understanding of the principles and core concepts of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a multiple fuel automatic switch-over's engine pedestal test system which characterized in that includes:
the fuel supply systems are connected in parallel and used for supplying fuel of different models;
the oil consumption testing device is used for testing the fuel consumption of the engine under each working condition and is provided with a first oil outlet and a second oil outlet;
the oil replenishing pump is arranged between an oil outlet of each path of the fuel supply system and an oil inlet of the fuel consumption testing device and is used for replenishing fuel to the fuel consumption testing device;
the oil inlet of the fuel oil constant temperature system is provided with an oil supply pump, and a second oil outlet of the oil consumption testing device is connected with the oil supply pump; the first oil outlet of the oil consumption testing device is connected with the oil supply pump through an air separator;
a multi-way valve comprising a controllable channel corresponding to each said fuel supply system, each controllable channel being in operable communication with an oil outlet of said fuel thermostatic system;
the first end of the engine fuel oil butt joint device is connected with an oil inlet of an engine to be tested, and the second end of the engine fuel oil butt joint device is connected with an oil outlet of the multi-way valve; the first end of the engine is also connected with an oil inlet of each corresponding fuel oil supply system and is used for emptying the fuel oil in the engine;
a first switching valve is arranged between the oil supplementing pump and the oil consumption testing device, and is also provided with an oil return port which is operatively communicated with an oil inlet of each path of fuel supply system;
and a first compressed air ventilation interface is also arranged between the oil outlet of each fuel supply system and the oil replenishing pump.
2. The engine bench test system for automatically switching multiple fuels according to claim 1, wherein a second compressed air ventilation interface is further arranged at a second fuel outlet of the fuel consumption test device.
3. The system for testing the engine bench capable of automatically switching the multiple fuels according to claim 1 or 2, wherein a third compressed air ventilation interface is further arranged between the multi-way valve and the engine fuel butt joint device.
4. The engine bench test system for automatic switching of multiple fuels according to claim 1 or 2, characterized in that the fuel supply system comprises an oil storage tank, an oil inlet of the oil storage tank is communicated with a corresponding oil depot through a normally open pneumatic ball valve, and a first filter and an oil inlet normally closed pneumatic ball valve are further arranged between the normally open pneumatic ball valve and the oil inlet of the oil storage tank; a fuel evaporation and recovery device is arranged at an oil inlet of the oil storage tank; and an oil outlet of the oil storage tank is provided with a normally closed pneumatic ball valve.
5. The engine bench test system for automatically switching multiple fuels according to claim 1 or 2, wherein the first end of the engine fuel docking device is further connected with the oil inlet of each corresponding fuel supply system through a second switching valve.
6. The engine bench test system for automatically switching multiple fuels according to claim 1 or 2, wherein a temperature detection device is further arranged between the fuel constant temperature system and the multi-way valve, and the temperature detection device is in communication connection with the fuel constant temperature system.
7. The engine bench test system for automatically switching multiple fuels according to claim 1 or 2, wherein a pressure detection device is further arranged between the multi-way valve and the engine fuel butt joint device, and the pressure detection device is in communication connection with the fuel supply pump.
8. The engine bench test system for automatically switching multiple fuels according to claim 1 or 2, wherein the engine fuel docking device comprises a quick docking plate and a fuel rail interface connected with the engine, the quick docking plate is provided with an oil inlet and an oil outlet, the oil inlet on the quick docking plate is communicated with the fuel rail interface, and the oil outlet on the quick docking plate is communicated with the fuel rail interface.
9. The system for testing the engine bench capable of automatically switching among a plurality of fuels as set forth in claim 4, wherein the oil storage tank is further connected with the fuel vapor recovery device through a pressure balancing pipe.
10. A control method of an engine bench test system capable of automatically switching multiple fuels is characterized by comprising the following steps:
s1: closing an oil return passage where the second switching valve corresponds to the fuel model, and connecting compressed air at a third compressed air ventilation interface to perform air tightness inspection on the fuel supply system corresponding to the test model and each pipeline connected with the engine; if the air tightness is qualified, closing compressed air at a third compressed air ventilation interface, simultaneously opening an oil return passage where a second switching valve is corresponding to the fuel type, and discharging the compressed air in the engine rack test system through a corresponding oil storage tank;
s2: closing an oil return passage where the second switching valve corresponds to the fuel type; then filling fuel oil into an oil storage tank of the corresponding fuel oil supply system, opening a corresponding valve, an oil supplementing pump, a fuel consumption testing device and an oil supply pump, simultaneously switching the multi-way valve to a controllable channel with a corresponding model, and supplying the fuel oil with the corresponding model to the engine to be detected to perform fuel consumption testing;
s3: after oil consumption tests under various working conditions are finished, opening an oil return passage where the corresponding model of the second switching valve is located, opening an oil return port of the first switching valve, opening a first compressed air ventilation interface between an oil outlet of a fuel supply system of the corresponding test model and an oil supplementing pump, and communicating compressed air to discharge the oil supplementing pump, fuel oil in the oil consumption test device, a pipeline connected with the oil supplementing pump and the oil consumption test device and fuel oil in devices in a pipeline circulation path;
s4: starting a second compressed air ventilation interface from a second oil outlet of the oil consumption testing device, and communicating compressed air to discharge fuel oil in a pipeline communicated with the second oil outlet and a device in a pipeline circulation path;
s5: opening a third compressed air ventilation interface between a multi-way valve and the engine fuel butt joint device, and connecting compressed air to discharge fuel in a circulation path of an oil outlet of the multi-way valve and fuel in an engine connected with the engine fuel butt joint device;
s6: and for the test of the subsequent fuel models, repeating the steps S1-S5, wherein the controllable channels in the first switching valve, the second switching valve and the multi-way valve are required to be switched to oil ports or channels of corresponding models.
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Application publication date: 20211231 |