CN109340014A - A working method of a dual discharge mode plasma igniter with a single fuel inlet - Google Patents
A working method of a dual discharge mode plasma igniter with a single fuel inlet Download PDFInfo
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- CN109340014A CN109340014A CN201811257923.XA CN201811257923A CN109340014A CN 109340014 A CN109340014 A CN 109340014A CN 201811257923 A CN201811257923 A CN 201811257923A CN 109340014 A CN109340014 A CN 109340014A
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- air
- fuel inlet
- ionization space
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- 239000000446 fuel Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000009977 dual effect Effects 0.000 title claims 2
- 238000010891 electric arc Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 7
- 239000003574 free electron Substances 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims abstract description 6
- 150000001768 cations Chemical class 0.000 claims abstract description 4
- 230000005684 electric field Effects 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000009257 reactivity Effects 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims 3
- 230000007935 neutral effect Effects 0.000 claims 2
- 230000001131 transforming effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 239000008246 gaseous mixture Substances 0.000 abstract description 8
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000007789 gas Substances 0.000 description 9
- 239000003345 natural gas Substances 0.000 description 8
- 230000005611 electricity Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P23/00—Other ignition
- F02P23/04—Other physical ignition means, e.g. using laser rays
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/48—Generating plasma using an arc
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Double discharge mode plasma igniter working methods with single fuel inlet that the invention discloses a kind of, specifically include: power supply is powered by orificed anode of low-voltage first, center anode no power；At low voltage, dielectric barrier discharge occurs between orificed anode and insulating positioning sleeve, insulating positioning sleeve and grounding electrode, fuel positioned at ionization space a ionizes under DC Electric Field, generates free electron and the nonequilibrium plasma with positive charge cation composition；Under action of high voltage arc discharge occurs for power supply using higher voltage as center anode supply between grounding electrode and center anode, while center anode is powered, the air duct in center anode is passed through air；In entire discharge process, the fuel for igniting is passed through by fuel inlet, some another air and fuel mixture enters ionization space b through spout adverse current, and the gaseous mixture for being accordingly used in igniting is integrally in rich, can be further ensured that the effect that igniting is ignited.
Description
Technical field
The present invention relates to a kind of plasma igniter working method, specifically a kind of double with single fuel inlet are put
Power mode plasma igniter working method.
Background technique
Natural gas is used as engine fuel as a kind of clean energy resource extensively.In power train in vehicle application field, it is with CNG
The passenger car and load-carrying vehicle of fuel are increasing；In ship power field, CNG and LNG powered ship has become " made in China
Focus on research direction in 2025 " planning.Compared with gasoline, the natural gas as gaseous fuel needs bigger ignition energy,
This causes to be difficult with single spark ignitor natural gas the natural gas used for automobile engine of small cylinder diameter in actual use, because
This has to make engine work in such a way that gasoline ignites.Which results in system complex, costs to increase, under reliability
A series of problems, such as drop.Therefore, it is necessary to take novel ignition technology, using relatively simple structure, the height of natural gas is realized
Effect igniting and burning enable natural gas engine to stablize under single-fuel mode, reliable work.
Traditional engine spark plug configuration as shown in Figure 1, in structure generally by a central electrode and with its distance
Closer one or several lateral electrode compositions.When work, ignition coil is the power supply of center electrode, and voltage is up to ten thousand volts of 1.5-2.?
Under High Pressure Difference between contre electrode and lateral electrode, gas is breakdown, shape in the small space between central electrode and lateral electrode
At high temperature discharge channel, igniting and burning start.
The shortcomings that prior art are as follows: (1) existing spark plug easily leads to ignition energy utilization rate often with very high temperature rise
It is low and influence electrode life；(2) ignition range is only located at the small space between central electrode and lateral electrode, is applied to large-diameter
Engine or when being not easy fuel (such as natural gas) lighted, igniting less reliable is easily led to since ignition energy is too small.
Summary of the invention
For solve existing thermal equilibrium plasma igniter technical solution applied on the engine of large space burning room and
Ignition energy is small when applying on natural gas engine, igniting poor reliability, the problems such as ignition energy utilization rate is low, and the application provides
A kind of double discharge mode plasma igniter working methods with single fuel inlet.
To achieve the above object, the technical solution of the application are as follows: a kind of double discharge modes with single fuel inlet etc. from
Daughter igniter working method, specifically includes:
A, a certain amount of fuel is passed through by fuel inlet；
B, power supply is powered by orificed anode of low-voltage first, center anode no power；At low voltage, orificed anode with
Dielectric barrier discharge occurs between insulating positioning sleeve, insulating positioning sleeve and grounding electrode, the fuel positioned at ionization space a is adding outside
It is ionized under electric field action, generates free electron and the nonequilibrium plasma with positive charge cation composition；
C, the fuel being passed through forms downward eddy flow in ionization space a；Fuel inlet is continually fed into fuel, has higher
The nonequilibrium plasma of reactivity flows through isolated area and enters ionization space b, and fuel inlet at this time is closed, and orificed anode is disconnected
Electricity；
D, igniter spout is connected with engine main chamber, and main burning room pressure is larger, therefore will have part
Fuel, air gaseous mixture through spout adverse current enter in ionization space b；
E, under the high energy electron effect in generated nonequilibrium plasma, become in the gaseous mixture molecule of electroneutral
Positively charged heavy ion and electronegative free electron, to be changed into nonequilibrium plasma；
F, power supply is using higher voltage as center anode supply, under action of high voltage between grounding electrode and center anode
Arc discharge occurs, while center anode is powered, the air duct in center anode is passed through air, this partial air is not joined
With ionization reaction；
G, the air in air duct is in electroneutral, inhibits combustion reaction, therefore a small amount of ionization space b to a certain extent
The high activity gas of interior formation is entered in air duct by air inlet inclined hole；
H, flame will accelerate to go out from spout in the form of large volume flame torch, into engine chamber, ignites and is located at
Burn indoor flammable air and fuel mixture；
Above-mentioned working method is implemented in plasma igniter, the plasma igniter, including middle heart-yang
Pole, orificed anode, grounding electrode, insulating positioning sleeve, fuel inlet, air inlet inclined hole, the center anode have hollow structure, should
Hollow structure is air duct；The insulating positioning sleeve is located in grounding electrode, and the orificed anode is located at insulating positioning sleeve
In wall body, orificed anode top is exposed outside；The upper portion of the center anode is in insulating positioning sleeve centre bore, middle heart-yang
The lower portion of pole is in the lower part of grounding electrode；An ionization space a is formed between SI semi-insulation positioning sleeve and grounding electrode, in
An insulating space is formed between the middle and lower part and grounding electrode of heart-yang pole, forms one between the lower part and grounding electrode of center anode
Ionization space b, the ionization space b are in isosceles trapezoid, and the ionization space a, insulating space are connected with ionization space b；?
The upper one end of grounding electrode is provided with fuel inlet diagonally downward, and the fuel inlet is connected with ionization space a；Institute
The lower end for stating center anode is provided with several air inlet inclined holes circumferentially, diagonally downward.
Further, the application further includes insulating positioning sleeve pressing plate, between dead earth electrode and insulating positioning sleeve
Relative position.
Further, the application further includes anode fixture nut, between center anode and insulating positioning sleeve, the sun
Pole fixture nut is used with center anode and is threadedly coupled.
Further, the thin top end of the center anode is exposed outside.
Due to using the technology described above, can obtain following technical effect: this programme uses dielectric impedance to the present invention
Electric discharge-arc discharge combined discharge mode, can the lean flammability limit of nonequilibrium plasma is wide, reactivity is big, and
The advantages such as the operating air pressure height of thermal equilibrium plasma combine, and reach and realize high energy, steady within the scope of wide fuel air ratio
Pinpoint the purpose of fire；Meanwhile the fuel that fuel inlet sprays into also will play cooling effect to anode, can play extension electrode makes
With the effect in service life；In entire discharge process, the fuel for igniting is passed through by fuel inlet, some another air-combustion
Material gaseous mixture enters ionization space b through spout adverse current, and the gaseous mixture for being accordingly used in igniting is integrally in rich, can further protect
The effect that card igniting is ignited.Moreover, because using flaring grounding electrode export structure, be conducive to arc discharge generation and flame
Accelerate.
Detailed description of the invention
Fig. 1 is engine spark plug configuration schematic diagram traditional in background technique；
Fig. 2 is the cross-sectional view of the application；
Ignition control strategy figure when Fig. 3 is applied to internal combustion engine；
Ignition control strategy figure when Fig. 4 is applied to other engines and burner；
Fig. 5 is the top view of the application；
Number explanation in figure: 1, fuel inlet；2, grounding electrode；3, insulating positioning sleeve pressing plate；4, center anode；5, cyclic annular
Anode；6, anode fixture nut；7, ionization space a；8, insulating positioning sleeve；9, ionization space b；10, air inlet inclined hole；11, it positions
Flange；12, insulating space.
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.
As shown in Figure 2-5, the present embodiment provides a kind of plasma igniters, including center anode, orificed anode, ground connection
Electrode, insulating positioning sleeve；The center anode has hollow structure, is located at plasma igniter center, is mounted on sun
In the insulation sleeve of pole, structure is up-thin-low-thick column, and centre has a boss for limiting center anode and anodized insulation set
Relative position；In the lower end of the center anode, several air inlet inclined holes circumferentially, diagonally downward are provided with, for that will lack
It measures the high activity gas formed in ionization space b and introduces air duct；During the orificed anode is installed on by insulating positioning sleeve
On the outside of heart-yang pole；The grounding electrode passes through insulating positioning sleeve fixed center anode and orificed anode；The anode fixing bolt
Between center anode and insulating positioning sleeve, with center anode using being threadedly coupled, for center anode to be fixed on insulation
On positioning sleeve；The insulation sleeve pressing plate is used to fix the relative position of insulating positioning sleeve and grounding electrode；The grounding electrode
Top is provided with a fuel inlet, for being passed through fuel；The direction of the fuel inlet and grounding electrode are in tangential and downward
Inclined arrangement, for generating downward eddy flow in ionization space a；The grounding electrode lower end has one to be used to install this
The locating flange of plasma igniter.According to actual needs, which also can be set in grounding electrode upper end.
When work, a certain amount of fuel is passed through by fuel inlet.At this point, power supply is supplied by orificed anode of lower voltage first
Electricity (such as: 10,000 volts or less), center anode no power；At the lower voltage, orificed anode-insulating positioning sleeve-grounding electrode it
Between dielectric barrier discharge occurs, the fuel positioned at ionization space a ionizes under DC Electric Field, generate free electron and
Nonequilibrium plasma with positive charge cation composition, chemical reactivity improve.
It due to fuel inlet and grounding electrode arranged tangential and tilts down, the fuel being passed through is in ionization space a
Form downward eddy flow；Since fuel inlet is continually fed into fuel, there is the nonequilibrium plasma compared with high reaction activity to flow through
Isolated area enters ionization space b, and fuel inlet at this time is closed, orificed anode power-off.Since igniter spout is fired with owner is mobilized
It burns room to be connected, and main burning room pressure is larger, therefore will there is part of fuel-air gaseous mixture to enter ionization through spout adverse current
In the b of space.Under the high energy electron effect in generated nonequilibrium plasma, become band in the gaseous mixture molecule of electroneutral
The heavy ion of positive electricity and electronegative free electron, to be changed into nonequilibrium plasma, reactivity is improved.At this point, electric
Source with higher voltage (such as: ten thousand volts of 1.5-2) be center anode supply.Grounding electrode and center anode under action of high voltage
Between arc discharge occurs.While center anode is powered, the air duct in center anode is passed through air, this partial air
It is not involved in ionization reaction, role is to cool down for electrode, and generate disturbance to the flow field of nozzle to improve burning.Due to sky
Air in gas channel is in electroneutral, can inhibit combustion reaction, therefore the height formed in a small amount of ionization space b to a certain extent
Active gases is entered in air duct by air inlet inclined hole, to properly increase the activity of the air in air duct, promotes burning
Corresponsively carry out；Since the reactivity of gaseous mixture at this time has improved, igniting and combustion reaction occur rapidly.Due to adopting
With flaring grounding electrode export structure, be conducive to arc discharge generation, and flame will be added in the form of large volume flame torch
Speed is gone out from spout, into engine chamber, is ignited and is located at the indoor flammable air and fuel mixture that burns.
Specifically, the control method of above-mentioned igniter includes control method on piston-mode motor, starts at other
The control method of machine and burner；
(1) control method on piston-mode motor (reciprocating or rotary piston) specifically: crank position sensing
Device judges crank position, if current crank angle does not arrive setting value, continues to judge；If having arrived setting value, by ECU to power supply
Output low pressure discharge instruction.
After power supply is connected to electric discharge instruction, a certain lower voltage U1 is exported to orificed anode, is denoted as time t1 at this time.At this point,
Orificed anode and grounding electrode discharge, and form dielectric barrier discharge in ionization space a, the gas quilt in ionization space a
It is ionized into nonequilibrium plasma.It is moved downward with that is, being ionized gas, enters ionization sky by insulating space through the Δ t time
Between b.
In t1+ time Δt, low pressure discharge instruction is terminated, orificed anode power-off.At this point, ECU exports electrion to power supply
Instruction, power supply export a certain high voltage U2 (U2 > U1) to center anode.At this point, center anode and grounding electrode discharge, in electricity
From arc discharge is formed in the b of space, the nonequilibrium plasma in ionization space b with very high reaction activity is ignited,
Combustion reaction starts.Due to using flaring grounding electrode export structure, be conducive to arc discharge generation, and flame will be with big
The form acceleration of volume flame torch is gone out from spout, enters main chamber.While center anode is discharged, ECU output control
Instruction, is passed through air to the air duct of center anode, and cooling for center anode, this partial air goes out spout, to flame
Jet flow field generates disturbance, promotes combustion efficiency.
ECU reads cylinder pressure sensor signal.If cylinder presses p to be greater than a certain setting value p1, then it is assumed that light a fire successfully, ECU continues
CRANK SENSOR is read, subsequent cycle igniting is carried out.If cylinder presses p to be less than p1, then it is assumed that loss of ignition, at this time ECU
It to power source output command, is discharged with U2+ Δ U center anode, while increasing the fuel flow rate entered through fuel inlet, and continue
It reads cylinder and presses signal, until lighting a fire successfully；If when discharge voltage increases to always setting value U3 (U3 > U2) or fuel
Flow still judges loss of ignition when increasing to a certain setting value, to guarantee that ignitor terminates safely electric discharge, this circulation no longer point
Fire.
(2) in the control method of other engines and burner specifically: ECU issues low pressure discharge instruction to power supply.Electricity
After source is connected to electric discharge instruction, a certain lower voltage U1 is exported to orificed anode, is denoted as time t1 at this time.At this point, orificed anode with
Grounding electrode electric discharge, forms dielectric barrier discharge in ionization space a, the gas in ionization space a is ionized to non-flat
Weigh plasma.It is moved downward with that is, being ionized gas, enters ionization space b by insulating space through the Δ t time.
In t1+ time Δt, low pressure discharge instruction is terminated, orificed anode power-off.At this point, ECU exports electrion to power supply
Instruction, power supply export a certain high voltage U2 (U2 > U1) to center anode.At this point, center anode and grounding electrode discharge, in electricity
From arc discharge is formed in the b of space, the nonequilibrium plasma in ionization space b with very high reaction activity is ignited,
Combustion reaction starts.Due to using flaring grounding electrode export structure, be conducive to arc discharge generation, and flame will be with big
The form acceleration of volume flame torch is gone out from spout, enters main chamber.While center anode is discharged, ECU output control
Instruction, is passed through air to the air duct of center anode, and cooling for center anode, this partial air goes out spout, to flame
Jet flow field generates disturbance, promotes combustion efficiency.
ECU reads temperature sensor signal, obtains burning room temperature T.If temperature T is greater than a certain setting value T1, then recognize
To light a fire successfully, electrion instruction immediately is terminated, and center anode power-off, ignition process terminates.If temperature T is less than T1, recognize
For loss of ignition, ECU discharges center anode to power source output command with U2+ Δ U at this time, at the same increase through fuel inlet into
The fuel flow rate entered, and continue to read temperature signal, until lighting a fire successfully；If when discharge voltage increases to always setting value
Loss of ignition is still judged when U3 (U3 > U2) or when fuel flow rate increases to a certain setting value, to guarantee that ignitor terminates safely
Electric discharge, and export failure alarm signal.
The protection scope of the invention is not limited thereto, and anyone skilled in the art is in the present invention
It creates in the technical scope disclosed, the technical solution and its inventive concept created according to the present invention are subject to equivalent substitution or change,
It should all cover within the protection scope of the invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257923.XA CN109340014A (en) | 2018-10-26 | 2018-10-26 | A working method of a dual discharge mode plasma igniter with a single fuel inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257923.XA CN109340014A (en) | 2018-10-26 | 2018-10-26 | A working method of a dual discharge mode plasma igniter with a single fuel inlet |
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| Publication Number | Publication Date |
|---|---|
| CN109340014A true CN109340014A (en) | 2019-02-15 |
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| CN201811257923.XA Withdrawn CN109340014A (en) | 2018-10-26 | 2018-10-26 | A working method of a dual discharge mode plasma igniter with a single fuel inlet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811584A (en) * | 2022-03-30 | 2022-07-29 | 沈阳工程学院 | Brown gas cyclone composite positive-stage plasma porous medium burner |
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| WO2013035880A1 (en) * | 2011-09-11 | 2013-03-14 | イマジニアリング株式会社 | High-frequency radiation plug |
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2018
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|---|---|---|---|---|
| CN1222956A (en) * | 1996-05-29 | 1999-07-14 | 可耐特公司 | Travelling spark ignition system and ignitor therefor |
| CN1556564A (en) * | 2003-12-31 | 2004-12-22 | 天津大学 | Ultra high energy spark plug |
| WO2013035880A1 (en) * | 2011-09-11 | 2013-03-14 | イマジニアリング株式会社 | High-frequency radiation plug |
| EP2889469A1 (en) * | 2012-06-22 | 2015-07-01 | Imagineering, Inc. | Antenna structure and internal combustion engine |
| CN104779524A (en) * | 2014-12-30 | 2015-07-15 | 大连理工大学 | Dielectric barrier discharge non-equilibrium plasma spark plug for internal combustion engine |
| CN106438158A (en) * | 2016-11-07 | 2017-02-22 | 中国人民解放军空军工程大学 | Main combustion chamber of aviation engine based on plasma jet ignition combustion |
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| CN108005790A (en) * | 2017-11-29 | 2018-05-08 | 中国人民解放军空军工程大学 | Based on the aero-engine plasma jet igniter from bleed |
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| CN114811584A (en) * | 2022-03-30 | 2022-07-29 | 沈阳工程学院 | Brown gas cyclone composite positive-stage plasma porous medium burner |
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Application publication date: 20190215 |