CN107271193A - Simulate the constant volume combustion bomb System and method for of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine - Google Patents
Simulate the constant volume combustion bomb System and method for of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine Download PDFInfo
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- CN107271193A CN107271193A CN201710676286.9A CN201710676286A CN107271193A CN 107271193 A CN107271193 A CN 107271193A CN 201710676286 A CN201710676286 A CN 201710676286A CN 107271193 A CN107271193 A CN 107271193A
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 561
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 142
- 239000000446 fuel Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000009977 dual effect Effects 0.000 title claims abstract description 22
- 239000002283 diesel fuel Substances 0.000 claims abstract description 54
- 238000002347 injection Methods 0.000 claims abstract description 45
- 239000007924 injection Substances 0.000 claims abstract description 45
- 238000005507 spraying Methods 0.000 claims abstract description 34
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 11
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 45
- 238000001816 cooling Methods 0.000 claims description 30
- 239000003921 oil Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 14
- 239000011214 refractory ceramic Substances 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000010721 machine oil Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000013480 data collection Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims 1
- 238000013517 stratification Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 25
- 238000005516 engineering process Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000011160 research Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 4
- -1 Methanol Compound Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
Abstract
The present invention relates to the constant volume combustion bomb System and method for of the simulation a variety of combustion modes of Methanol/Diesel Dual Fuel Engine.The constant volume combustion bomb system of a variety of combustion modes of dual fuel engine is simulated, including：Constant volume combustion bomb, diesel injector, the diesel injection system being connected with diesel injector, methanol injector, the methanol spraying system being connected with methanol injector, gas handling system, gas extraction system, pressure sensor, simultaneous data-acquisition, high-speed camera, host computer.The present invention is by adjusting time for spraying of the methanol relative to diesel oil, diesel oil ignited methanol, diesel oil and methanol can be realized while catching fire, methanol is prior to a variety of combustion modes such as diesel oil spontaneous combustion, methanol uniform premix concentration stratification in constant volume combustion bomb can also be realized respectively, and the injection pressure of methanol is flexibly adjustable.
Description
Technical field：
The present invention relates to internal combustion engine constant volume combustion bomb technical field, start further to simulation Methanol/Diesel Dual Fuel
The constant volume combustion bomb System and method for of a variety of combustion modes of machine.
Background technology：
To meet increasingly strict automobile emission regulation and fuel consumption regulation, more and more advanced engine technologies are obtained
Using, including in-cylinder direct-jet, high-pressure injection, multi-injection, variable injection timing, lift range variable (VVL) and timing
(VVT), charge inter cooling, waste gas recycling (EGR) etc. improve purification techniques and triple effect catalytic converter (TWC) in the cylinder of burning,
The post-processing technologies such as oxidation refonner (DOC), SCR (SCR) and particulate filter (DPF), but either
, all there is the deficiencies such as technical threshold height, system complex, operation and maintenance be with high costs in purification techniques also post-processing technology in cylinder.
In order to improve discharge while fuel consumption is reduced, alternative fuel technology has obtained extensive concern in recent years.Alternative fuel
The technical scheme applied on the engine mainly has three kinds：The first is blending method, i.e., mix two kinds of fuel by cosolvent
The liquid fuel of isotropic stable is formed, this mode is simple and easy to apply, but weak point is to vary with temperature two kinds of fuel easily to go out
Now it is layered, and because the not high this mode of mutual solubility can not realize high substitution rate；The second way is complete replacement, that is, is started
Machine only uses alternative fuel, such as methanol engine, natural gas engine and liquefied-pertroleum-gas engine, and this mode can be with
100% substitution rate is realized, but because fuel physico-chemical property difference need to be to doing larger change, and fuel adding etc. to engine
Complete sets of basic equipment facility is not popularized also；The third mode is the method for igniting, i.e., two kinds fuel take two sets of independent supply systems, patent
Document CN1470752A discloses diesel oil/Methanol Compound Combustion Mode technology (Diesel Methanol Compound
Combustion, DMCC), the technology proposes to spray methanol in air inlet path for diesel engine, enters gas with air formation homogeneous charge
Cylinder, then in the diesel oil ignited methanol of in-cylinder direct-jet and the gaseous mixture of air, this mode is flexible in actual applications, without right
Former machine does big change, and can realize higher substitution rate.Methanol production raw material sources are extensive, technology of preparing is ripe, raw
Production cost is low, storing and transporting security is convenient, in conjunction with diesel oil ignited Methanol Compound Combustion Mode technology so that methanol has as alternative fuel
Wide application prospect.
Find that, when methanol diesel oil substitute at high proportion, engine thermal efficiency is significantly by the application to this double fuel
Improve, national existing Abgasgesetz just particularly can be met without using urea, wide answer is provided for this combustion system
Use prospect.In order to further improve the thermal efficiency and reduction hazardous emission of this kind of engine, it is necessary to be carried out to its working mechanism
Further investigation.Research is concentrated mainly on engine rig test and actual road test at present, and on the basic burning side of double fuel
The research in face is also less.In order to probe into interaction mechanism during double fuel burning, deepen the understanding burnt to double fuel, so that
Preferably tissue burning, it is preferably engineer applied service to make double fuel burning, and carrying out related basic research work has very
Important meaning.On the engine because various factors is coupled, it is impossible to study influence of the single factors to burning；Compare
Compared with for, constant volume combustion bomb is simple in construction, it is possible to achieve the accurate control to unitary variant, and being carried out with reference to other optical devices can
Combustion process can be disclosed with visual and clear depending on changing research, be especially suitable for carrying out the research in terms of basic burning.
Current disclosed patent document CN103245511A, patent document CN104391074A, patent document
CN105372072A, patent document CN106353098A, patent document CN106404410A are only applicable to the spraying of single-fuel
And combustion research；Patent document CN204788958U can realize that double fuel burns, and the technical scheme proposes be heated to necessarily
Methanol is injected in the air inlet pipeline of temperature, and vacuumize makes constant volume combustion bomb inner chamber form negative pressure in advance, so that methanol is sucked
Into constant volume combustion bomb, but this method has some substantially not enough：(1) the addition moment of uncontrollable methanol, it is difficult to for not
Double fuel catches fire and burnt in the hot atmosphere of diesel oil spirt methanol under synthermal condition, particularly hot conditions；(2) enter in advance
The methanol gaseous mixture of constant volume combustion bomb, once heating-up temperature reaches more than its ignition point, methanol will spontaneous combustion, significantly limit
The research range burnt to this double fuel, particularly in actual diesel oil methanol dual fuel engine running, high temperature bar
High-load region is the high efficient district of dual fuel engine under part, but but cannot fully study；(3) methanol can not be realized
Stratified combustion enter because methanol is premix in constant volume combustion bomb, in constant volume combustion bomb be first before diesel injection
The homogeneous charge of alcohol and air, it is impossible to realize the concentration stratification of methanol.
In summary, solve to study in constant volume combustion bomb double fuel burn faced methanol add the moment it is uncontrollable,
Environment temperature and pressure limit it is narrow and can not realize methanol concentration layering etc. technical problem.
The content of the invention：
The invention provides a kind of constant volume combustion bomb system for simulating a variety of combustion modes of Methanol/Diesel Dual Fuel Engine
With method.Concrete technical scheme is as follows：
The constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated, including：Constant volume combustion bomb
16, diesel injector 8, the diesel injection system being connected with diesel injector, methanol injector 14 is connected with methanol injector
Methanol spraying system, gas handling system, gas extraction system, pressure sensor 24, simultaneous data-acquisition 10, high-speed camera 17, on
Position machine 23；The diesel injection system, methanol spraying system, pressure sensor, high-speed camera are by simultaneous data-acquisition
Realize control；The constant volume combustion bomb includes：Circular cylindrical cavity, 2 end caps；2 end caps are divided into the first end cap, the second end
Lid；Transparent windows are set on the second end cap, and high-speed camera is arranged in outside constant volume combustion bomb and alignment transparent windows；It is described
Constant volume combustion bomb has heating function, the working environment for simulated engine；Diesel injection system and methanol the injection system
Unite respective independent control；Simultaneous data-acquisition by diesel injector signal, methanol injector signal, pressure sensor signal,
High-speed camera picture signal is synchronous, and stores data in host computer.
The side for the simulation a variety of combustion modes of Methanol/Diesel Dual Fuel Engine realized in above-mentioned constant volume combustion bomb system
Method, comprises the following steps：
Step 1：Check the air-tightness of constant volume combustion bomb；
Step 2：Gas handling system is filled with air to constant volume combustion bomb；
Step 3：Constant volume combustion bomb is begun to warm up, and the air in constant volume combustion bomb is reached predetermined pressure and temperature；
Step 4：Start diesel injection system, methanol spraying system；By adjusting the time for spraying of diesel oil and methanol respectively,
So as to realize diesel oil ignited methanol, diesel oil methanol at the same catch fire and methanol prior to diesel oil generation three kinds of different double fuels of spontaneous combustion
Combustion mode；
Step 5：High-speed camera record diesel injector, the injection scheme picture of methanol injector, and image during burning,
And be stored in host computer.
It is resistance in the nested refractory ceramics burner hearth of circular cylindrical cavity inwall in order to realize that constant volume combustion bomb has heating function
Refractory ceramics burner hearth embeds electric heating body.
Electric furnace heating wire may be selected in the electric heating body of the constant volume combustion bomb；Therefore, the constant volume combustion bomb also includes：Positioned at resistance to
First temperature sensor 25 of refractory ceramics burner hearth inner periphery, and the relay being connected by low resistance spark plug with electric furnace heating wire
Device, heating-up temperature PID controller.
The preferred distribution scheme of the diesel injector, methanol injector：The diesel injector is installed vertically on constant volume
On the circular cylindrical cavity of firebomb, the methanol injector is installed on the first end cap of constant volume combustion bomb center, diesel injection
The center line of device and methanol injector is in an angle of 90 degrees.
It is described in order to prevent that methanol spraying from directly contacting red-hot burner hearth wall and occurs the further technique effect of spontaneous combustion
The constant volume combustion bomb system of the simulation a variety of combustion modes of dual fuel engine also includes：Center line and methanol injector centerline weight
The cylindrical shape kuppe 15 of conjunction.
Preferably, the geometric parameter of the cylindrical shape kuppe is met：
D=α D,
Wherein d represents the internal diameter of kuppe 15, and D represents burner hearth internal diameter, and L represents the length of kuppe, and θ represents methanol injection
Device spray cone angle, α, β are coefficients, and α spans are that 0.6~0.8, β spans are 0.55~0.65.
One of specific implementation of the diesel injection system, including：Diesel oil electronic control unit 5, diesel fuel tanks 7, bavin
Oil rectifier 6, high-pressure oil pump 3, high-pressure common rail 4, high-pressure oil pipe, oil return pipe, machine oil charging machine, motor 2 and frequency converter 1；
One of specific implementation of the methanol spraying system, including：Methanol electronic control unit 19, methanol tank 11,
Gas-liquid booster pump 12, methanol pressurizing vessel 13, alcohol transportation pipe, input source of the gas 18, time alcohol pipe.
One of the gas handling system, specific implementation of gas extraction system, including：Tank of compressed air 22, pressure inverting
Device, air inlet electromagnetic valve 28, PID controller, air inlet needle-valve 29, air inlet pipe etc.；Air inlet pipeline is made up of parallel two-way, is all the way
Automatically controlled by air inlet electromagnetic valve, controlled manually by air inlet needle-valve all the way；The gas extraction system includes：Exhaust solenoid valve 26,
Vavuum pump 21 and exhaust needle-valve 27.
Preferably, in addition to：Cooling system；The cooling system includes diesel injector cooling system and methanol injector
Cooling system, two sets of cooling systems include water tank, water pump, cooling-water temperature sensor, circulating water line, cooling water cavity, fixed
Hold firebomb diesel injector mounting hole and methanol injector mounting hole around set respectively diesel injector cooling water cavity 31,
Methanol injector cooling water cavity 32；Diesel injector cooling system and methanol injector cooling system share water tank, a water pump
And cooling-water temperature sensor.
Beneficial effects of the present invention are：
(1) constant volume combustion bomb has heating function in the present invention, hot environment that can be in simulated engine inside cylinder；It is real
Apply in example, constant volume combustion bomb is by the way of built-in burner hearth and electric furnace heating wire, it is possible to achieve air in constant volume combustion bomb is more filled
Divide and uniform heating.
(2) in the embodiment of the present invention, methanol uses completely self-contained spraying system, by adjusting methanol relative to diesel oil
Time for spraying, it is possible to achieve diesel oil ignited methanol, diesel oil and methanol catch fire simultaneously, methanol is prior to a variety of burnings such as diesel oil spontaneous combustion
Pattern, methanol uniform premix concentration stratification in constant volume combustion bomb, and the injection pressure spirit of methanol can also be realized respectively
Work is adjustable.
(3) in the embodiment of the present invention, cylindrical shape kuppe has been installed additional in methanol injector periphery, can effectively prevent methanol
Hit red-hot burner hearth wall and occur spontaneous combustion, can fully simulate high load capacity in diesel engine by ambient temperature to higher
When combustion chamber HTHP in top dead centre heating power environment.
(4) in the embodiment of the present invention, diesel injector and methanol injector are taken and arranged at an angle of 90 so that diesel oil oil beam
Fully contact and mix with methanol spraying, so as to give full play to the interaction of two kinds of fuel rooms.
(5) in the embodiment of the present invention, the heating of constant volume combustion bomb electric furnace heating wire only need to pass through heating-up temperature using automatically controlling
PID controller sets target temperature to be that control to electric furnace heating wire can be achieved, thus realize in constant volume combustion bomb air it is automatic
Heating, and heating and temperature control obtains very accurate.
(6) in the embodiment of the present invention, gas handling system includes the parallel air inlet pipeline of two-way, a route pressure transmitter, height
Pressure electromagnetic valve and PID controller are constituted, and only need to set target pressure value by PID controller, you can control air inlet electromagnetic valve
Opening and closing, realize auto-admission, another route air inlet needle-valve is constituted, and takes manual control, admission pressure can be finely adjusted,
The efficiency and security of experiment so can have both been improved, again can be with the accuracy of guarantee test；
(7) in the embodiment of the present invention, gas extraction system is automatically performed exhaust process using exhaust solenoid valve, without manual
Operation, gas extraction system is further equipped with vavuum pump, carries out vacuum pumping to constant volume combustion bomb after the completion of exhaust every time, excludes constant volume
Influence of the unburned methanol and other combustion products of residual to experiment next time, had so both improved the safety of experiment in firebomb
Property, test error is reduced again.
Brief description of the drawings：
Fig. 1 is the overall system structure schematic diagram of the present invention；1 represents frequency converter, and 2 represent motor, and 3 represent high-pressure oil pump, 4
High-pressure common rail is represented, 5 represent diesel oil electronic control unit, and 6 represent diesel fuel filter, and 7 represent diesel fuel tanks, and 8 represent diesel injection
Device, 9 represent charge amplifier, and 10 represent simultaneous data-acquisition, and 11 represent methanol tank, and 12 represent gas-liquid booster pump, and 13 represent
Methanol pressurizing vessel, 14 represent methanol injector, and 15 represent cylindrical shape kuppe, and 16 represent constant volume combustion bomb, and 17 represent at a high speed
Video camera, 18 represent gas-liquid booster pump input source of the gas, and 19 represent methanol electronic control unit, and 20 represent heating and temperature control mould
Block, 21 represent vavuum pump, and 22 represent tank of compressed air, and 23 represent host computer, 24 representative pressure sensors, and 25 represent the first temperature
Sensor is spent, 26 represent exhaust solenoid valve, and 27 represent exhaust needle-valve, and 28 represent air inlet electromagnetic valve, and 29 represent air inlet needle-valve.
Fig. 2 is constant volume combustion bomb complete section front view；8 represent diesel injector, and 14 represent methanol injector, and 15 represent cylinder
Shape kuppe, 30 represent constant volume combustion bomb thermal insulation layer, and 31 represent diesel injector cooling water cavity, and 32 represent the cooling of methanol injector
Water cavity, 40 represent quartz glass mounting hole.
Fig. 3 is Fig. 2 the first end cap left view direction schematic diagram；14 represent methanol injector, and 33 to represent methanol injector cold
But water inlet, 34 represent methanol injector coolant outlet.
Fig. 4 is Fig. 2 overlook direction schematic diagram；8 represent diesel injector, and 35 represent air admission hole, and 36 represent the first temperature
The mounting hole of sensor, 37 represent the spark plug mounting hole of connection electric furnace heating wire, and 38 represent steam vent, 39 representative pressure sensors peace
Fill hole, 42 representative pressure transmitter mounting holes.
Embodiment：
Embodiment：
The present invention is described in further detail below by specific embodiment, following examples can make this professional skill
The present invention is more completely understood in art personnel, but the invention is not limited in any way.
As shown in figure 1, simulating determining for a variety of combustion modes of Methanol/Diesel Dual Fuel Engine this embodiment discloses herein a kind of
Hold firebomb system, including：Constant volume combustion bomb, diesel injector, the diesel injection system being connected with diesel injector, methanol spray
Emitter, the methanol spraying system being connected with methanol injector, gas handling system, gas extraction system, pressure sensor, synchronous data collection
Card, high-speed camera；The diesel injection system, methanol spraying system, pressure sensor are realized by simultaneous data-acquisition
Control；Host computer；
Constant volume combustion bomb 16 is the circular cylindrical cavity that inner hollow is made of stainless steel, and it is internal equipped with refractory ceramics
Burner hearth, form a long 268mm, and diameter 80mm cylindrical cavity simulates the environment of burning chamber of diesel engine HTHP.
Burner hearth embeds electric furnace heating wire, and burner hearth inner periphery installs the first temperature sensor, subsequently connects through low resistance spark plug
The relay that is connected with electric furnace heating wire, heating-up temperature PID controller, relay and heating-up temperature PID controller are integrated in heating temperature
Spend in control module 20, only need to set target temperature in heating-up temperature PID controller in process of the test, pass through relay
Break-make controls the automatic heating to air in constant volume combustion bomb 16 of electric furnace heating wire.
The end cap at the two ends of constant volume combustion bomb 16 is fixed and clamped using high-strength bolt, the first end cap, the second end cap and body
Between be respectively provided with asbestos washer and ensure sealing, the second end cap is provided with quartz glass mounting hole 40, and the first end cap installs methanol
Injector 14, and methanol injector cooling water cavity 32 is set, diesel injector 8 is arranged on the top of constant volume combustion bomb 16, and
Diesel injector cooling water cavity 31 is set, air admission hole 35, the first temperature sensor are additionally provided with the top of constant volume combustion bomb 16
Mounting hole 36, the spark plug mounting hole 37 for connecting electric furnace heating wire, steam vent 38, pressure sensor mounting hole 39, pressure transmitter peace
Fill hole 42.
Diesel injection system uses high pressure common rail fuel injection system, using the rotating speed of 1 controlled motor of frequency converter 2, so as to drive
Dynamic high-pressure oil pump 3 sets up rail pressure, and high-pressure oil pump 3 uses the oil pump of Bosch CPN2.2 models, and highest can realize 160MPa injection pressures
Power.
Methanol spraying system uses gas-liquid pressure-boosting pumping system, provides less by inputting source of the gas 18 to gas-liquid booster pump 12
Drive air pressure, you can realize and methanol is compressed so as to export the methanol of elevated pressures, gas-liquid booster pump is a kind of plunger pump,
Pump fast reciprocating works during work, increases with output pressure, and the reciprocating motion of pump slows down until stopping, and now pump output pressure is permanent
Fixed, when pressure dwelling loop pressure declines, pump meeting automatic start, supplement leakage pressure keeps circuit pressure stable.Adopted in the present embodiment
The model GD28 provided with Jinan Shineeast Fluid Systems Equipment Co., Ltd. product, the pump pressure ratio of the model is 28,
The driving air pressure for inputting source of the gas is no more than 0.8MPa, and rated output pressure is 22.4MPa, is sprayed in gas-liquid booster pump 12 and methanol
Install a pressurizing vessel 13 between device 14 additional, can so prevent from spraying the big ups and downs of pressure after multi-injection methanol.
Methanol injector 14, which is used, puts 6 hole fuel injectors in GDI, to ensure that flow methanol injector 14 should select porous
Symmetrical injector.Its mouth of methanol injector 14 extend into the length held in bullet should not be oversize, and length is 1~3mm, because
For in process of the test, the air inside constant volume combustion bomb is constantly being heated, and temperature is very high, determine if methanol injector mouth is stretched into
Oversize in appearance firebomb, then the methanol of methanol injector interior cannot well be cooled down and can vaporized, and the methanol of ejection is
Gas rather than liquid, influence result of the test.
The periphery of methanol injector 14 has installed a cylindrical shape kuppe 15 additional, prevents methanol spraying from directly contacting red-hot stove
Bore wall face and occur spontaneous combustion because the constant volume combustion bomb 16 in the present invention is to constant volume by the way of built-in burner hearth and electric furnace heating wire
Air in firebomb 16 is heated, and the wall surface temperature of burner hearth is high, especially under the operating condition of test of high-temperature condition, first
If alcohol spraying, which directly contacts red-hot burner hearth wall, will occur spontaneous combustion.The length of cylindrical shape kuppe 15 and its diameter, methanol
Spray cone angle burner hearth internal diameter is relevant, and the oversize substantial amounts of methanol spray residues of kuppe 15 can not be wherein sufficiently mixed with air, circle
Tubular kuppe 15 is too short, can not stop methanol Spray Wall-Impingement.The diameter and calculating formula of length of cylindrical shape kuppe 15：
D=α D,
Wherein, d represents the internal diameter of kuppe 15, and D represents burner hearth internal diameter, and L represents the length of kuppe 15, and θ represents spraying
Cone angle, α, β are coefficients, and α spans are that 0.6~0.8, β spans are 0.55~0.65.
Cooling system includes diesel injector cooling system and methanol injector cooling system, and two sets of cooling systems share one
Individual water tank, water pump and cooling-water temperature sensor, because the boiling point of methanol is 64 DEG C, it is noted that control water temperature in process of the test
60 DEG C are not exceeded.
Pressure sensor uses Kistler 6125C type piezoelectric pressure indicators, subsequently connects Kistler
5018A1000 type charge amplifiers, frequency acquisition reaches as high as 70kHz.
High-speed camera uses Photron companies FASTCAM SA1.1 type cameras, and camera lens uses Tokina companies MACRO
100F2.8D type products, the type camera shooting speed reaches as high as 675000 frames/second, and resolution ratio reaches as high as 1024 × 1024,
The depth for gathering image is 12bit, can add filter plate, two-way device (duochrome method before camera lens as needed in process of the test
Measure soot), other optical devices such as image intensifier (shoot free radical light).
Simultaneous data-acquisition mainly includes simultaneous data-acquisition 10 (DAQ), data syn-chronization line and data line etc.,
Wherein DAQ uses NI companies USB-6251BNC type high-speed data acquisition cards, and simultaneous data-acquisition can realize that diesel injection is believed
Number, that methanol injection signal, high-speed camera shoot signal, pressure sensor collection signal is synchronous, and store data in upper
In machine.
Gas handling system includes the parallel air inlet pipeline of two-way, a route air inlet electromagnetic valve 28 and the structure of induction control module 41
Into wherein induction control module 41 includes pressure transmitter and PID controller, only need to pass through PID on induction control module 41
Controller sets target inlet air pressure value, you can the opening and closing of control air inlet electromagnetic valve 28, realizes auto-admission, another route pin
Valve 29 is constituted, and takes manual control, and admission pressure can be finely adjusted.Due to the constant volume combustion bomb 16 under actual tests operating mode
Internal pressure is in the range of 1~4MPa, to ensure the sealing of constant volume combustion bomb 16 and the security of intake process and reliably
Property, air inlet electromagnetic valve 28 uses high-pressure solenoid valve.
Gas extraction system is automatically performed exhaust process using magnetic valve 26, without manually operated.It is fixed after experiment due to completing
Hold the discharge of firebomb 16 is the gas of HTHP, to ensure the sealing of constant volume combustion bomb 16 and the security of exhaust process
And reliability, exhaust solenoid valve 26 uses high temperature high voltage solenoid valve.Gas extraction system is further equipped with vavuum pump 21, and exhaust every time is completed
Exhaust needle-valve 27 is opened afterwards, vacuum pumping is carried out to constant volume combustion bomb 16, excludes the unburned first of residual in constant volume combustion bomb 16
The influence of alcohol and other combustion products to experiment next time.
For easy to operate, diesel injector, methanol injector, high-speed camera, control circle of simultaneous data-acquisition
Face is integrated on host computer 23, tests obtained pressure and view data is stored in host computer 23.
The specific method tested using said system is as follows：
According to connecting system each device shown in Fig. 1, and check the air-tightness of constant volume combustion bomb；
Target inlet air pressure value is set on induction control module, air inlet electromagnetic valve is opened and is filled into constant volume combustion bomb
Gas, when pressure reaches desired value in constant volume combustion bomb, air inlet electromagnetic valve disconnects automatically；
Diesel injection system, methanol spraying system, high-speed camera, pressure sensor, the first temperature sensor and same
Step data capture card is standby；Target fuel injection parameter is set by diesel oil electronic control unit, by frequency converter regulation motor to fit
When rotating speed operation, driving high-pressure oil pump sets up rail pressure；Start methanol spraying system simultaneously, set by methanol electronic control unit
Target sprays alcohol parameter, and the injection pressure of methanol is adjusted by adjusting the driving air pressure of gas-liquid pressure-boosting pumping system input source of the gas；It is logical
Cross host computer and set acquisition parameters, frequency acquisition is adjusted by simultaneous data-acquisition control unit；
Start cooling system；
Start heating system：Target temperature is set in heating and temperature control module, electric furnace heating wire is automatically to constant volume burning
The heating of air in bullet, it is electric when temperature reaches that the relay in desired value, heating and temperature control module disconnects in constant volume combustion bomb
Stove silk stops heating, the pressure now as needed opened in air inlet needle-valve fine setting constant volume combustion bomb to desired value；
When the temperature and pressure condition in constant volume combustion bomb reaches predetermined value, triggering diesel oil electronic control unit starts manually
Oil spout, the trigger signal that methanol electronic control unit receives diesel oil electronic control unit starts to spray methanol, and synchrodata is adopted
Truck also begins to work, and the shooting signal of high-speed camera and pressure measxurement collection signal are synchronously triggered, when oil spout and spray alcohol knot
Shu Hou, diesel oil and pressure change and view data in methanol combustion process are recorded, and are stored in host computer；
Adjust the time for spraying of diesel oil and methanol in experiment respectively by diesel oil electronic control unit and methanol electronic control unit, so that
Realize diesel oil ignited methanol, diesel oil methanol while catching fire and the methanol double fuel burning different prior to diesel oil three kinds of spontaneous combustion of generation
Pattern, and the injection pressure of diesel oil and methanol, emitted dose can pass through diesel oil electronic control unit and methanol electronics control respectively
Unit regulation processed；Adjust the pressure and temperature in constant volume combustion bomb respectively by gas handling system and heating system, simulate different works
Heating power environment under condition in diesel combustion room；
Exhaust solenoid valve exhaust is opened after off-test, exhaust finishes disconnection exhaust solenoid valve, open exhaust needle-valve and true
Empty pump is vacuumized to constant volume combustion bomb, is that experiment next time is prepared.
Although above in conjunction with accompanying drawing, invention has been described, and the invention is not limited in above-mentioned specific implementation
Mode, above-mentioned embodiment is only schematical, rather than restricted, and one of ordinary skill in the art is at this
Under the enlightenment of invention, do not departing from present inventive concept and right, many variations can also be made, these belong to
Within protection scope of the present invention.
Claims (10)
1. simulate the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine, it is characterised in that including：
Constant volume combustion bomb (16), diesel injector (8), the diesel injection system being connected with diesel injector, methanol injector
(14) the methanol spraying system, being connected with methanol injector, gas handling system, gas extraction system, pressure sensor (24), synchrodata
Capture card (10), high-speed camera (17), host computer (23)；The diesel injection system, methanol spraying system, pressure sensing
Device, high-speed camera are realized by simultaneous data-acquisition and controlled；
The constant volume combustion bomb includes：Circular cylindrical cavity, 2 end caps；2 end caps are divided into the first end cap, the second end cap；The
Transparent windows are set on two end caps, and high-speed camera is arranged in outside constant volume combustion bomb and alignment transparent windows；
The constant volume combustion bomb has heating function, the working environment for simulated engine；The diesel injection system and first
The respective independent control of alcohol spraying system；Simultaneous data-acquisition is by diesel injector signal, methanol injector signal, pressure sensing
Device signal, high-speed camera picture signal are synchronous, and store data in host computer.
2. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1,
Characterized in that, in the nested refractory ceramics burner hearth of circular cylindrical cavity inwall, refractory ceramics burner hearth embeds electric heating body.
3. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 2,
Characterized in that, the electric heating body is electric furnace heating wire；Also include：Positioned at the first TEMP of refractory ceramics burner hearth inner periphery
Device (25), and be connected by low resistance spark plug with electric furnace heating wire relay, heating-up temperature PID controller.
4. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 2,
Characterized in that, the diesel injector is installed vertically on the circular cylindrical cavity of constant volume combustion bomb, the methanol injector peace
Loaded on the first end cap of constant volume combustion bomb center, the center line of diesel injector and methanol injector is in an angle of 90 degrees.
5. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 4,
Characterized in that, also including：The cylindrical shape kuppe (15) that center line is overlapped with methanol injector centerline；The cylindrical shape is led
The geometric parameter of stream cover is met：
D=α D,
<mrow>
<mi>L</mi>
<mo>=</mo>
<mi>&beta;</mi>
<mi>d</mi>
<mi> </mi>
<mi>cot</mi>
<mfrac>
<mi>&theta;</mi>
<mn>2</mn>
</mfrac>
<mo>,</mo>
</mrow>
Wherein d represents the internal diameter of kuppe 15, and D represents burner hearth internal diameter, and L represents the length of kuppe, and θ represents the spray of methanol injector
Spray angle, α, β are coefficients, and α spans are that 0.6~0.8, β spans are 0.55~0.65.
6. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-5 any one
Firebomb system, it is characterised in that：
The diesel injection system includes：Diesel oil electronic control unit (5), diesel fuel tanks (7), diesel fuel filter (6), high-pressure oil pump
(3), high-pressure common rail (4), high-pressure oil pipe, oil return pipe, machine oil charging machine, motor (2) and frequency converter (1)；
The methanol spraying system includes：Methanol electronic control unit (19), methanol tank (11), gas-liquid booster pump (12), methanol
Pressurizing vessel (13), alcohol transportation pipe, gas-liquid booster pump input source of the gas (18), time alcohol pipe.
7. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-5 any one
Firebomb system, it is characterised in that：
The gas handling system includes：Tank of compressed air (22), pressure transmitter, air inlet electromagnetic valve (28), PID controller, enter
Air tube valve (29), air inlet pipe；Air inlet pipeline is made up of parallel two-way, is to be automatically controlled by air inlet electromagnetic valve all the way, is all the way
Controlled manually by air inlet needle-valve；
The gas extraction system includes：Exhaust solenoid valve (26), vavuum pump (21) and exhaust needle-valve (27).
8. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-5 any one
Firebomb system, it is characterised in that also include：Cooling system；The cooling system includes diesel injector cooling system and first
Alcohol injector cooling system, two sets of cooling systems include water tank, water pump, cooling-water temperature sensor, circulating water line, cooling
Diesel injector is set to cool down respectively around water cavity, the diesel injector mounting hole and methanol injector mounting hole of constant volume combustion bomb
Water cavity (31), methanol injector cooling water cavity (32)；Diesel injector cooling system and methanol injector cooling system share one
Individual water tank, water pump and cooling-water temperature sensor.
9. in a variety of burnings of simulation Methanol/Diesel Dual Fuel Engine realized described in claim 1 in constant volume combustion bomb system
The method of pattern, it is characterised in that comprise the following steps：
Step 1：Check the air-tightness of constant volume combustion bomb；
Step 2：Gas handling system is filled with air to constant volume combustion bomb；
Step 3：Constant volume combustion bomb is begun to warm up, and the air in constant volume combustion bomb is reached predetermined pressure and temperature；
Step 4：Start diesel injection system, methanol spraying system；By adjusting the time for spraying of diesel oil and methanol respectively, so that
Realize diesel oil ignited methanol, diesel oil methanol while catching fire and the methanol double fuel burning different prior to diesel oil three kinds of spontaneous combustion of generation
Pattern；
Step 5：High-speed camera record diesel injector, the injection scheme picture of methanol injector, and image during burning, and protect
Exist in host computer.
10. simulate the method for a variety of combustion modes of Methanol/Diesel Dual Fuel Engine, the constant volume combustion bomb system required for method
Including：Constant volume combustion bomb (16), diesel injector (8), the diesel injection system being connected with diesel injector, methanol injector
(14) the methanol spraying system, being connected with methanol injector, gas handling system, gas extraction system, pressure sensor (24), synchrodata
Capture card (10), high-speed camera (17), cooling system；The diesel injection system, methanol spraying system, pressure sensor,
High-speed camera is realized by simultaneous data-acquisition and controlled；Host computer (23)；The constant volume combustion bomb includes：Cylindrical cavity
Body, 2 end caps；2 end caps are divided into the first end cap, the second end cap；Transparent windows, high-speed camera are set on the second end cap
Machine is arranged in outside constant volume combustion bomb and alignment transparent windows；The constant volume combustion bomb is in the nested high temperature resistant of circular cylindrical cavity inwall
Ceramic burner hearth, refractory ceramics burner hearth embeds electric heating body, and the electric heating body is electric furnace heating wire；Refractory ceramics burner hearth inner periphery
First temperature sensor (25) is installed, and the relay, the heating-up temperature PID that are connected by low resistance spark plug with electric furnace heating wire are controlled
Device processed, relay and PID controller are integrated in heating and temperature control module (20)；Diesel injection system and the methanol injection
The respective independent control of system；Simultaneous data-acquisition believes diesel injector signal, methanol injector signal, pressure sensor
Number, high-speed camera picture signal it is synchronous, and store data in host computer；The diesel injector is installed vertically on constant volume
On the circular cylindrical cavity of firebomb, the methanol injector is installed on the first end cap of constant volume combustion bomb center, diesel injection
The center line of device and methanol injector is in an angle of 90 degrees；The diesel injection system includes：Diesel oil electronic control unit (5), diesel oil
Case (7), diesel fuel filter (6), high-pressure oil pump (3), high-pressure common rail (4), high-pressure oil pipe, oil return pipe, machine oil charging machine, motor
And frequency converter (1) (2)；The methanol spraying system includes：Methanol electronic control unit (19), methanol tank (11), gas-liquid pressure-boosting
Pump (12), methanol pressurizing vessel (13), alcohol transportation pipe, gas-liquid booster pump input source of the gas (18), time alcohol pipe；The gas handling system bag
Include：Tank of compressed air (22), pressure transmitter, air inlet electromagnetic valve (28), PID controller, air inlet needle-valve (29), air inlet pipe,
Pressure transmitter and PID controller composition induction control module (41)；Air inlet pipeline is made up of parallel two-way, is by entering all the way
Pneumoelectric magnet valve is automatically controlled, and is controlled manually by air inlet needle-valve all the way；The gas extraction system includes：It is exhaust solenoid valve (26), true
Empty pump (21) and exhaust needle-valve (27)；The cooling system includes diesel injector cooling system and methanol injector cooling system
System, two sets of cooling systems include water tank, water pump, cooling-water temperature sensor, circulating water line, cooling water cavity, constant volume burning
Diesel injector cooling water cavity (31), methanol are set respectively around the diesel injector mounting hole and methanol injector mounting hole of bullet
Injector cooling water cavity (32)；Diesel injector cooling system and methanol injector cooling system share a water tank, water pump and
Cooling-water temperature sensor；It is characterised in that it includes following steps：
Check the air-tightness of constant volume combustion bomb；
Target inlet air pressure value is set on induction control module, air inlet electromagnetic valve is opened and is inflated into constant volume combustion bomb, when
Pressure reaches desired value in constant volume combustion bomb, and air inlet electromagnetic valve disconnects automatically；
Diesel injection system, methanol spraying system, high-speed camera, pressure sensor, the first temperature sensor and same step number
It is standby according to capture card；Target fuel injection parameter is set by diesel oil electronic control unit, by frequency converter regulation motor suitably to turn
Speed operation, driving high-pressure oil pump sets up rail pressure；Start methanol spraying system simultaneously, target is set by methanol electronic control unit
Alcohol parameter is sprayed, the injection pressure of methanol is adjusted by adjusting the driving air pressure of gas-liquid pressure-boosting pumping system input source of the gas；By upper
Position machine sets acquisition parameters, and frequency acquisition is adjusted by simultaneous data-acquisition control unit；
Start cooling system；
Start heating system：Target temperature is set in heating and temperature control module, electric furnace heating wire is automatically in constant volume combustion bomb
The heating of air, when temperature reaches that relay in desired value, heating and temperature control module disconnects in constant volume combustion bomb, electric furnace heating wire
Stop heating, the pressure now as needed opened in air inlet needle-valve fine setting constant volume combustion bomb to desired value；
When the temperature and pressure condition in constant volume combustion bomb reaches predetermined value, triggering diesel oil electronic control unit starts spray manually
Oil, the trigger signal that methanol electronic control unit receives diesel oil electronic control unit starts to spray methanol, synchronous data collection
Card also begins to work, and the shooting signal and pressure acquisition signal of high-speed camera are synchronously triggered, after oil spout terminates with spray alcohol, bavin
Pressure change and view data in oil and methanol combustion process are recorded, and are stored in host computer；In test
The time for spraying of diesel oil and methanol is adjusted by diesel oil electronic control unit and methanol electronic control unit respectively, so as to realize bavin
Oil ignites methanol, diesel oil methanol while catch fire and prior to diesel oil the different double fuel combustion mode of three kinds of spontaneous combustion occurs for methanol,
And the injection pressure of diesel oil and methanol, emitted dose can pass through diesel oil electronic control unit and methanol electronic control unit respectively
Regulation；Adjust the pressure and temperature in constant volume combustion bomb respectively by gas handling system and heating system, simulate bavin under different operating modes
Heating power environment in oil machine combustion chamber；
Exhaust solenoid valve exhaust is opened after off-test, exhaust finishes disconnection exhaust solenoid valve, opens exhaust needle-valve and vavuum pump
Constant volume combustion bomb is vacuumized, is that experiment next time is prepared.
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| CN108111168A (en) * | 2017-11-23 | 2018-06-01 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of modified engine fuel flow sensor signal Acquisition Circuit |
| CN110189613A (en) * | 2019-05-31 | 2019-08-30 | 湖南铁路科技职业技术学院 | A kind of transparent alcohol engine model |
| CN114993686A (en) * | 2022-05-30 | 2022-09-02 | 武汉理工大学 | Dual-fuel experimental system based on constant-volume combustion bomb |
| CN115014772A (en) * | 2022-05-30 | 2022-09-06 | 武汉理工大学 | Constant-volume combustion bomb system for simulating direct injection in dual-fuel cylinder and control method thereof |
| CN115372002A (en) * | 2022-08-29 | 2022-11-22 | 哈尔滨工程大学 | Integrated monitoring control system based on constant volume burning bomb system |
| CN116537985A (en) * | 2023-07-06 | 2023-08-04 | 潍柴动力股份有限公司 | Engine fuel injection device and control method |
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| CN108111168A (en) * | 2017-11-23 | 2018-06-01 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of modified engine fuel flow sensor signal Acquisition Circuit |
| CN110189613A (en) * | 2019-05-31 | 2019-08-30 | 湖南铁路科技职业技术学院 | A kind of transparent alcohol engine model |
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