CN110344976A - A kind of diesel oil, natural gas double fuel engine nozzle operation method - Google Patents
A kind of diesel oil, natural gas double fuel engine nozzle operation method Download PDFInfo
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- CN110344976A CN110344976A CN201910690925.6A CN201910690925A CN110344976A CN 110344976 A CN110344976 A CN 110344976A CN 201910690925 A CN201910690925 A CN 201910690925A CN 110344976 A CN110344976 A CN 110344976A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
- F02M27/04—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like by electric means, ionisation, polarisation or magnetism
- F02M27/042—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like by electric means, ionisation, polarisation or magnetism by plasma
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a kind of diesel oil, natural gas double fuel engine nozzle operation method, solenoid valve b is specifically included to lift first, natural gas enters gas fuel channel, needle-valve electrode discharge immediately, natural gas in ionization space forms plasma under electric field action, needle-valve electrode lifts at this time, and the high-activity natural gas after ionization is injected to engine chamber through spray orifice.With that is, natural gas stops gas supply, diesel oil fuel feeding starts, and a small amount of diesel oil is injected in combustion chamber through diesel fuel channel, pressure chamber and spray orifice, and catching fire and igniting under immense pressure temperature action in engine cylinder has sprayed into the natural gas of combustion chamber at this time.Since natural gas has been ionized to the plasma with very high reaction activity, easily diesel oil ignited, burning starts.
Description
Technical field
The present invention relates to a kind of nozzle operation method, specifically a kind of diesel oil, natural gas double fuel engine nozzle work
Make method.
Background technique
Increasingly stringent energy conservation and environmental protection requires to have become the ultimate challenge that engine research field is faced.With engine
Technology continues to introduce new, under the conditions ofs different load, different operating conditions etc., engine Best Economy, dynamic property and discharge
Requirement of the characteristic to fuel also has very big difference.Therefore, traditional single-fuel engine in certain certain applications gradually
Gradually it is unable to satisfy the requirement of people.Under this trend, dual fuel engine becomes an inevitable choice.
Due to can flexibly control the injection strategy of different fuel according to specific operating condition, to reach good engine
Can, dual fuel engine has gradually been applied to the dynamic fields such as automobile-used, ship.In existing double fuel technology path,
Every kind of fuel uses the scheme reliability with higher of independent fuel delivery and spraying system, but its is at high cost, structure arrangement
It is taken up too much space, can not be applied in certain engines for needing cramped construction；And dual fuel injector due to structure is complicated,
The problems such as reliability is low, there are no the mainstream solutions become in the industry.
The structure of available engine dual fuel nozzle is described in CN200520029399.2 such as patent, and structure is very simple
It is single, generally by nozzle body, needle-valve, valve pocket, solenoid valve block at.When work, valve pocket, which is lifted, needle-valve is taken a seat realizes the injection of fuel a,
Needle-valve, which lifts, valve pocket is taken a seat realizes the injection of fuel b, and high pressure fuel a and solenoid valve control valve pocket lifting and taking a seat, high compression ignition
Material b and solenoid valve control needle-valve lifting and take a seat.But the disadvantage is that: (1) fuel a and fuel b be all made of conventional pressure mist
Change technology, therefore to obtain good atomization must be using high injection pressure, this results in the raising of cost and reliabilities
Decline；(2) pressure atomization technology and the reactivity of fuel is had not been changed, therefore in some applications, it is necessary to using increasing point
The modes such as fiery energy come reach preferably igniting and combustibility.
Summary of the invention
To solve the problems such as available engine dual fuel nozzle atomizing effect is poor, use cost is high, reliability is low, the application
A kind of diesel oil, natural gas double fuel engine nozzle operation method are provided.
To achieve the above object, the technical solution of the application are as follows: a kind of diesel oil, natural gas double fuel engine nozzle operation
Method specifically includes:
(1) crankshaft position sensor judges crank position, if current crank angle does not arrive setting value, continues to judge；If
Setting value has been arrived, then instruction has been lifted to solenoid valve b output by controller ECU, is denoted as timeorigin t at this time；
(2) solenoid valve b is lifted, and natural gas enters gas fuel channel through fuel feed line；
(3) using timeorigin t as starting point, after the Δ t1 time interval by calibration, controller ECU issues instruction,
Power supply is powered to needle-valve electrode with high voltage U；
(4) needle-valve electrode, insulation needle-valve, start dielectric barrier discharge between grounding electrode, the day in ionization space
Right gas is ionized to as the nonequilibrium plasma with high reaction activity；
(5) timeorigin is denoted as with t+ Δ t1, after the Δ t2 time by calibration, controller ECU issues instruction, solenoid valve
C is lifted；
(6) needle-valve electrode lifts under the action of solenoid valve c, at this time gas fuel channel, ionization space, pressure chamber,
Spray orifice and engine chamber form natural gas path, and the plasma that natural gas ionization generates sprays from spray orifice, into burning
In room；
(7) timeorigin is denoted as with t+ Δ t1+ Δ t2, after the Δ t3 time by calibration, controller ECU sending refers to
It enables, solenoid valve b is closed, and natural gas stops gas supply；
(8) timeorigin is denoted as with t+ Δ t1+ Δ t2+ Δ t3, after the Δ t4 time by calibration, controller ECU hair
It instructs out, solenoid valve c pushes needle-valve electrode to take a seat, and gas fuel channel, ionization space, pressure chamber, spray orifice and engine fire
The natural gas path that room is formed is burnt to close；
(9) timeorigin is denoted as with t+ Δ t1+ Δ t2+ Δ t3+ Δ t4, after the Δ t5 time by calibration, controller
ECU issues instruction, and solenoid valve a is lifted, and high-pressure diesel enters diesel fuel channel；
(10) insulation needle-valve lifts under the action of high-pressure diesel, and diesel fuel channel, pressure chamber, spray orifice and engine fire
It burns room and constitutes access, diesel oil is sprayed from spray orifice；
(11) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU；If p >=p1, controller ECU judgement
Nozzle operation is normal, enters subsequent cycle immediately；If p < p1, engine thinks that nozzle does not work normally, follows immediately at n+1
When ring, power supply will be with the tension discharge of U+ Δ U1；
(12) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU；If p >=p1, controller ECU judgement
Nozzle operation is normal, enters subsequent cycle immediately；If p < p1, engine thinks that nozzle does not work normally, follows immediately at n+2
When ring, power supply will be with the tension discharge of U+ Δ U2, Δ U2 > Δ U1；
(13) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU；If p >=p1, controller ECU judgement
Nozzle operation is normal, enters subsequent cycle immediately；If p < p1, controller ECU terminates power supply power supply, and delivery nozzle work is different
Normal information.
Further, Δ t1 is to count from timeorigin t, and the time of ionization space will be entered to natural gas.
Further, high voltage U are as follows: 15~20kV.
Further, Δ t2 is the duration that will be full of ionization space to natural gas since electric discharge.
Further, Δ t3 be from using t+ Δ t1+ Δ t2 as timeorigin, to complete the operating condition under engine work
The time of the natural gas injection of required flow.
Further, Δ t4 is to spray into burning since being closed solenoid valve b, to remnants natural gases all in nozzle body
Time needed for room.
Further, p1 is when crankshaft is located at a certain specific position, and several circulation intrinsic motivation normal ignition institutes are right
Answer the average value of in-cylinder pressure.
The above method is implemented in a kind of dual fuel engine nozzle, and the dual fuel engine nozzle specifically includes
Nozzle body is equipped with accommodating cavity in the nozzle body, and needle-valve electrode, insulation needle-valve, grounding electrode, the needle are equipped in accommodating cavity
Valve electrode includes the electrode platform and electrode stem being connected, and electrode stem is located in insulation needle-valve and gap between the two is that ionization is empty
Between, grounding electrode is wrapped in insulation needle-valve periphery, and the periphery of the electrode platform is equipped with insulation sleeve, and the insulation sleeve passes through positioning pin
It is fixed on nozzle body top；Diesel fuel channel, the one end in the diesel fuel channel and accommodating are equipped in the side of accommodating cavity
Bottom of chamber portion is connected, and the other end in diesel fuel channel is connected with the solenoid valve a being located at the top of nozzle body；In the other side of accommodating cavity
Equipped with gas fuel channel, the one end in the gas fuel channel is connected with accommodating cavity top, gas fuel channel
The other end is connected with the solenoid valve b being located at the top of nozzle body, and solenoid valve c, the electricity are equipped between solenoid valve a and solenoid valve b
Magnet valve c is connected with needle-valve top of electrodes；The spray orifice a and spray orifice b being in communication with the outside are equipped in nozzle body bottom, accommodating cavity bottom is set
There is pressure chamber, the spray orifice a and spray orifice b are connected with pressure chamber；Lubrication hole is equipped between diesel fuel channel and accommodating cavity.
Further, the quantity of the lubrication hole is 3, and uppermost lubrication hole is used for a small amount of diesel oil from the diesel oil
It is introduced between needle-valve electrode and insulation sleeve in fuel channel, other two lubrication holes are used for a small amount of diesel oil from the diesel fuel
It is introduced in channel on the outside of grounding electrode between accommodating cavity.
Further, the needle-valve electrode is made of metal material, and controls the unlatching and closure in gas fuel channel, also
High-field electrode can be served as, realizes the dielectric barrier discharge between needle-valve electrode and grounding electrode.
Further, the insulation needle-valve is made of insulating material, and controls the unlatching and closure in diesel fuel channel, moreover it is possible to
Dielectric layer is served as, for realizing the dielectric barrier discharge between needle-valve electrode and grounding electrode.
Further, grounding electrode is made of metal material, and effect acts as low-field electrode, is realized needle-valve electrode and is connect
Dielectric barrier discharge between ground electrode.
Further, the solenoid valve a is used to control the fuel supply of diesel oil, and solenoid valve b is used to control the combustion of natural gas
Material supply, solenoid valve c is for controlling lifting and taking a seat for needle-valve electrode.
Further, the insulation sleeve is for realizing the insulation between needle-valve electrode and nozzle body.
Further, the diesel fuel channel, gas fuel channel body are inclined in nozzle body.
Further, Δ t5 be count at the time of sprayed into combustion chamber with all natural gases, natural gas is starting
Time needed for forming more uniform distribution in machine combustion chamber.
Due to using the technology described above, can obtain following technical effect: the application uses dielectric impedance to the present invention
The mode of discharge excitation ionizes the main fuel natural gas in diesel oil-natural gas engine dual fuel nozzle, Neng Gouli
Improve the distribution of natural gas with nonequilibrium plasma aerodynamic effect, improved using nonequilibrium plasma chemical effect and sprayed
The reactivity of mist, final realize improve atomization, improve burning, reduce harmful products of combustion emission level and expand firing range
Purpose.Meanwhile when the needle-valve electrode no power in application, this programme can be used as common dual fuel nozzle and work normally.
Detailed description of the invention
Fig. 1 is engine dual-fuel nozzle cross-sectional view in the application；
Fig. 2 is natural gas injection and ionization process schematic diagram；
Fig. 3 is diesel injection process schematic；
Fig. 4 is the working method schematic diagram of the application.
Number explanation in figure: 1- nozzle body, 11- lubrication hole, 12- diesel fuel channel, 13- gas fuel channel, 14-
Spray orifice, the pressure chamber 15-, 16- ionization space, 2- solenoid valve a, 3- solenoid valve c, 4- solenoid valve b, 5- positioning pin, 6- insulation sleeve, 7-
Needle-valve electrode, 8- insulation needle-valve, 9- grounding electrode.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments: doing as example to the application
Further description explanation.
Embodiment 1
As shown in Figure 1-3, the present embodiment provides a kind of dual fuel engine nozzle, including nozzle body, solenoid valve, positioning
Pin, insulation sleeve, needle-valve electrode, insulation needle-valve, grounding electrode；The nozzle body is primary structure, for carrying other each components
And structure, and realize fuel injection, gas fuel channel 13, diesel fuel channel 12 and three are machined on the nozzle body
A lubrication hole 11；The gas fuel channel 13 is for introducing natural gas, and the diesel fuel channel is for introducing diesel oil, most
Above lubrication hole 11 be used for by a small amount of diesel oil from introduced between needle-valve electrode 7 and insulation sleeve 6 in the diesel fuel channel 12, under
Two, face lubrication hole be used for by a small amount of diesel oil from the diesel fuel channel introduce grounding electrode on the outside of and accommodating cavity between, from
And realize the lubrication of the two；The solenoid valve have altogether there are three, wherein solenoid valve a and solenoid valve b be respectively used to control diesel oil and
The fuel of natural gas supplies, and solenoid valve b is for controlling lifting and taking a seat for needle-valve electrode 7；The positioning pin 5 is used for nozzle body 1
And the positioning between insulation sleeve 6, so that the lubrication hole 11 between nozzle body 1 and insulation sleeve 6 be made to be connected to；The insulation sleeve is for real
Insulation between existing needle-valve electrode 7 and nozzle body 1；The needle-valve electrode 7 is made of metal material, there are two effect, first
Effect is to control the unlatching and closure of gas fuel access, and second effect acts as high-field electrode, realizes needle-valve electrode 7-
Dielectric barrier discharge between grounding electrode 9；The insulation needle-valve 8 is made of insulating material, and there are two effect, first effects
It is the unlatching and closure for controlling diesel fuel access, second effect acts as dielectric layer, for realizing needle-valve electrode 7- ground connection
Dielectric barrier discharge between electrode 9；The grounding electrode 9 is made of metal material, and effect acts as low-field electrode, is realized
Dielectric barrier discharge between needle-valve electrode 7- grounding electrode 9.
When work, solenoid valve b is lifted first, and natural gas enters gas fuel channel 13, and needle-valve electrode 7 discharges immediately,
Natural gas in ionization space 16 forms plasma under electric field action, and needle-valve electrode 7 lifts at this time, the high activity after ionization
Natural gas is injected to engine chamber through spray orifice 14.With that is, natural gas stops gas supply, diesel oil fuel feeding starts, a small amount of diesel oil warp
Diesel fuel channel 12, pressure chamber 15 and spray orifice 14 are injected in combustion chamber, in engine cylinder under immense pressure temperature action
It catches fire and ignites and sprayed into the natural gas of combustion chamber at this time.Due to natural gas be ionized to very high reaction activity etc.
Gas ions, thus it is easily diesel oil ignited, and burning starts.
If 7 no power of needle-valve electrode, this programme can be used as conventional diesel oil-natural gas double-fuel nozzle and use.
Embodiment 2
As shown in figure 4, the present embodiment provides a kind of diesel oil, natural gas double fuel engine nozzle operation method, it is specific to walk
Suddenly are as follows:
(1) it being recycled at n-th, crankshaft position sensor judges crank position, if current crank angle does not arrive setting value,
Continue to judge；If having arrived setting value, instruction is lifted to solenoid valve b4 output by ECU, is denoted as timeorigin t at this time.
(2) solenoid valve b4 is lifted, and natural gas enters gas fuel channel 13 through fuel feed line.
(3) using timeorigin t as starting point, (Δ t1 is to calculate from timeorigin t after the Δ t1 time interval by calibration
Rise, the time of ionization space 16 will be entered to natural gas), ECU issues instruction, and power supply is to needle-valve electrode 7 with high voltage U
(such as: 15~20kV) power.
(4) needle-valve electrode 7, insulation needle-valve 8, starting dielectric barrier discharge between grounding electrode 9, (natural gas just fills at this time
Full ionization space 16), the natural gas in ionization space 16 is ionized to as the non-equilibrium plasma with high reaction activity
Body.
(5) timeorigin is denoted as with t+ Δ t1, (Δ t2 is since electric discharge to natural gas after the Δ t2 time by calibration
The duration of ionization space 16 will be full of), ECU issues instruction, and solenoid valve c3 is lifted.
(6) needle-valve electrode 7 lifts under the action of solenoid valve c3, at this time gas fuel channel 13, ionization space 16, pressure
Power room 15, spray orifice 14 and engine chamber form natural gas path, and the plasma that natural gas ionization generates is sprayed from spray orifice 14
Out, into combustion chamber.
(7) timeorigin is denoted as with t+ Δ t1+ Δ t2, (Δ t3 is from t+ Δ t1+ after the Δ t3 time by calibration
Δ t2 is timeorigin, to the time for completing the natural gas injection of flow needed for engine work under the operating condition), ECU hair
It instructs out, solenoid valve b4 is closed, and natural gas stops gas supply.
(8) timeorigin is denoted as with t+ Δ t1+ Δ t2+ Δ t3, (Δ t4 is from electromagnetism after the Δ t4 time by calibration
Time needed for valve b4 closing starts, sprays into combustion chamber to remnants natural gases all in nozzle body), ECU issues instruction, electromagnetism
Valve c3 pushes needle-valve electrode 7 to take a seat, gas fuel channel 13, ionization space 16, pressure chamber 15, spray orifice 14 and engine combustion
The natural gas path that room is formed is closed.
(9) timeorigin is denoted as with t+ Δ t1+ Δ t2+ Δ t3+ Δ t4, (Δ t5 is after the Δ t5 time by calibration
It is counted at the time of penetrating in combustion chamber with all natural gases, natural gas forms more uniform distribution institute in engine combustion room
The time needed), ECU issues instruction, and solenoid valve a2 is lifted, and high-pressure diesel enters diesel fuel channel 12.
(10) insulation needle-valve 8 lifted under the action of high-pressure diesel, diesel fuel channel 12, pressure chamber 15, spray orifice 14 with
Engine chamber constitutes access, and diesel oil is sprayed from spray orifice 14.
(11) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU.If (p1 is when crankshaft is located to p >=p1
When a certain specific position, the average value of in-cylinder pressure corresponding to several circulation intrinsic motivation normal ignitions should have certain nargin),
Then controller ECU judges that nozzle operation is normal, enters subsequent cycle immediately；If p < p1, engine thinks the abnormal work of nozzle
Make, immediately in n+1 circulation, power supply will be with the tension discharge of U+ Δ U1.
(12) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU.If (p1 is when crankshaft is located to p >=p1
When a certain specific position, the average value of in-cylinder pressure corresponding to several circulation intrinsic motivation normal ignitions should have certain nargin),
Then controller ECU judges that nozzle operation is normal, enters subsequent cycle immediately；If p < p1, engine thinks the abnormal work of nozzle
Make, immediately in n+2 circulation, power supply will be with the tension discharge of U+ Δ U2, Δ U2 > Δ U1.
(13) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU.If (p1 is when crankshaft is located to p >=p1
When a certain specific position, the average value of in-cylinder pressure corresponding to several circulation intrinsic motivation normal ignitions should have certain nargin),
Then controller ECU judges that nozzle operation is normal, enters subsequent cycle immediately；If p < p1, controller ECU terminates power supply power supply,
And delivery nozzle operation irregularity information.
But the protection scope of the invention is not limited thereto, and anyone skilled in the art is in this hair
Bright to create in the technical scope disclosed, the technical solution and its inventive concept created according to the present invention are subject to equivalent replacement or change
Become, should all cover within the protection scope of the invention.
Claims (7)
1. a kind of diesel oil, natural gas double fuel engine nozzle operation method, which is characterized in that specifically include:
(1) crankshaft position sensor judges crank position, if current crank angle does not arrive setting value, continues to judge；If having arrived
Setting value then lifts instruction to solenoid valve b output by controller ECU, is denoted as timeorigin t at this time；
(2) solenoid valve b is lifted, and natural gas enters gas fuel channel through fuel feed line；
(3) using timeorigin t as starting point, after the Δ t1 time interval by calibration, controller ECU issues instruction, power supply
It is powered to needle-valve electrode with high voltage U；
(4) needle-valve electrode, insulation needle-valve, start dielectric barrier discharge between grounding electrode, the natural gas in ionization space
It is ionized to as the nonequilibrium plasma with high reaction activity；
(5) timeorigin is denoted as with t+ Δ t1, after the Δ t2 time by calibration, controller ECU issues instruction, solenoid valve c lift
It rises；
(6) needle-valve electrode lifts under the action of solenoid valve c, at this time gas fuel channel, ionization space, pressure chamber, spray orifice
Natural gas path is formed with engine chamber, the plasma that natural gas ionization generates is sprayed from spray orifice, into combustion chamber；
(7) timeorigin is denoted as with t+ Δ t1+ Δ t2, after the Δ t3 time by calibration, controller ECU issues instruction, electricity
Magnet valve b is closed, and natural gas stops gas supply；
(8) timeorigin is denoted as with t+ Δ t1+ Δ t2+ Δ t3, after the Δ t4 time by calibration, controller ECU sending refers to
It enables, solenoid valve c pushes needle-valve electrode to take a seat, gas fuel channel, ionization space, pressure chamber, spray orifice and engine chamber
The natural gas path of formation is closed；
(9) timeorigin is denoted as with t+ Δ t1+ Δ t2+ Δ t3+ Δ t4, after the Δ t5 time by calibration, controller ECU hair
It instructs out, solenoid valve a is lifted, and high-pressure diesel enters diesel fuel channel；
(10) insulation needle-valve lifts under the action of high-pressure diesel, diesel fuel channel, pressure chamber, spray orifice and engine chamber
Access is constituted, diesel oil is sprayed from spray orifice；
(11) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU；If p >=p1, controller ECU judges nozzle
It is working properly, enter subsequent cycle immediately；If p < p1, engine thinks that nozzle does not work normally, recycles immediately at n+1
When, power supply will be with the tension discharge of U+ Δ U1；
(12) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU；If p >=p1, controller ECU judges nozzle
It is working properly, enter subsequent cycle immediately；If p < p1, engine thinks that nozzle does not work normally, recycles immediately at n+2
When, power supply will be with the tension discharge of U+ Δ U2, Δ U2 > Δ U1；
(13) cylinder pressure sensor acquisition cylinder presses signal p, and passes to controller ECU；If p >=p1, controller ECU judges nozzle
It is working properly, enter subsequent cycle immediately；If p < p1, controller ECU terminates power supply power supply, and delivery nozzle operation irregularity is believed
Breath.
2. a kind of diesel oil, natural gas double fuel engine nozzle operation method according to claim 1, which is characterized in that Δ
T1 is to count from timeorigin t, and the time of ionization space will be entered to natural gas.
3. a kind of diesel oil, natural gas double fuel engine nozzle operation method according to claim 1, which is characterized in that compared with
High voltage U are as follows: 15~20kV.
4. a kind of diesel oil, natural gas double fuel engine nozzle operation method according to claim 1, which is characterized in that Δ
T2 is the duration that will be full of ionization space to natural gas since electric discharge.
5. a kind of diesel oil, natural gas double fuel engine nozzle operation method according to claim 1, which is characterized in that Δ
T3 be from using t+ Δ t1+ Δ t2 as timeorigin, to the gas spraying for completing flow needed for engine work under the operating condition
The time penetrated.
6. a kind of diesel oil, natural gas double fuel engine nozzle operation method according to claim 1, which is characterized in that Δ
T4 is since being closed solenoid valve b, the time needed for spraying into combustion chamber to remnants natural gases all in nozzle body.
7. a kind of diesel oil, natural gas double fuel engine nozzle operation method according to claim 1, which is characterized in that p1
For when crankshaft is located at a certain specific position, the average values of in-cylinder pressure corresponding to several circulation intrinsic motivation normal ignitions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110905675A (en) * | 2019-12-02 | 2020-03-24 | 北京交通大学 | Combustion-supporting injection device and method for reducing NOx emission and internal combustion engine |
| CN112065593A (en) * | 2020-09-03 | 2020-12-11 | 一汽解放汽车有限公司 | Dual-fuel injector and internal combustion engine |
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| CN110344976B (en) | 2021-03-26 |
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