CN109253016A - A kind of double discharge mode plasma igniters with hollow vent anode - Google Patents
A kind of double discharge mode plasma igniters with hollow vent anode Download PDFInfo
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- CN109253016A CN109253016A CN201811258061.2A CN201811258061A CN109253016A CN 109253016 A CN109253016 A CN 109253016A CN 201811258061 A CN201811258061 A CN 201811258061A CN 109253016 A CN109253016 A CN 109253016A
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- grounding electrode
- anode
- insulation set
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
Abstract
The invention discloses a kind of double discharge mode plasma igniters with hollow vent anode, including Anodic, lower anode, upper grounding electrode, lower grounding electrode, anodized insulation set, grounding electrode insulation set；The upper grounding electrode is connected with lower grounding electrode, and the anodized insulation is placed in grounding electrode, and Anodic is embedded in the wall body of anodized insulation set；The lower anode includes a sections and ontology b sections of ontology, and described ontology a sections are mounted in the mounting hole of anodized insulation set, and b sections of ontology are mounted in lower grounding electrode；Opened up in the junction of lower grounding electrode and upper grounding electrode fluted, the groove is located on the inner wall of lower grounding electrode, and the installation of grounding electrode insulation set is in a groove；The application can the lean flammability limit of nonequilibrium plasma is wide, reactivity be big and the advantages such as the operating air pressure height of thermal equilibrium plasma combine, and achievees the purpose that realize high energy, stable ignition within the scope of wide fuel air ratio.
Description
Technical field
The present invention relates to a kind of plasma igniter, specifically a kind of double discharge modes with hollow vent anode
Plasma igniter.
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 makes engine work by the way of having to ignite or be arranged using other fuel precombustion chamber.Which results in system complex,
A series of problems, such as cost raising, reliability decrease.Therefore, it is necessary to take novel ignition technology, using relatively simple knot
Structure realizes the efficient igniting and burning of natural gas, so that natural gas engine is stablized under single-fuel mode, reliable work
Make.
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 igniters with hollow vent anode.
To achieve the above object, a kind of technical solution of the application are as follows: double discharge modes etc. with hollow vent anode
Gas ions igniter, including Anodic, lower anode, upper grounding electrode, lower grounding electrode, anodized insulation set, grounding electrode insulation
Set；The upper grounding electrode is connected with lower grounding electrode, and the anodized insulation is placed in grounding electrode, and Anodic is embedded in
In the wall body of anodized insulation set；The lower anode includes a sections and ontology b sections of ontology, and described ontology a sections are mounted on anodized insulation set
Mounting hole in, b sections of ontology are mounted in lower grounding electrode；It is offered in the junction of lower grounding electrode and upper grounding electrode recessed
Slot, the groove are located on the inner wall of lower grounding electrode, and the installation of grounding electrode insulation set is in a groove；The upper grounding electrode with
Ionization space a is formed between anodized insulation set, forms isolated area between grounding electrode insulation set and b sections of ontology of lower anode, under
Ionization space b, the ionization space a, isolated area and ionization space b phase are formed between b sections of the ontology of anode and lower grounding electrode
Connection.
Further, the application further includes fixing bolt, for the phase between fixed upper grounding electrode and anodized insulation set
To position.
Further, the lower anode has hollow structure, and the hollow structure is air duct.
Further, ionization space b further includes lower anode bottom space.
Further, the Anodic is located at plasma igniter center.
Further, the lower grounding electrode lower part is equipped with the locating flange for installing the plasma igniter.
Further, the upper grounding electrode top is equipped with the locating flange for installing the plasma igniter.
The present invention due to using the technology described above, can obtain following technical effect: use dielectric barrier discharge-electricity
The mode of arc discharge combined discharge, can the lean flammability limit of nonequilibrium plasma is wide, reactivity be big and thermal balance etc.
The advantages such as the operating air pressure height of gas ions combine, and reach and realize high energy, stable ignition within the scope of the wide fuel air ratio
Purpose；Meanwhile it being passed through a small amount of air in the lower anode with hollow structure, it can be reached for electrode cooling, and to nozzle
Flow field generate disturbance to improve the effect of burning.
Detailed description of the invention
Fig. 1 is engine spark plug configuration schematic diagram traditional in background technique；
Fig. 2 is the structural schematic diagram 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.
Number explanation in figure: 1, fixing bolt；2, anodized insulation set；3, Anodic；4, upper grounding electrode；5, ionization space
a；6, isolated area；7, grounding electrode insulation set；8, lower anode；9, lower grounding electrode；10, locating flange；11, ionization space b.
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 in Figure 2-4, the present embodiment provides a kind of double discharge mode plasma ignitings with hollow vent anode
Device, including Anodic, lower anode, upper grounding electrode, lower grounding electrode, anodized insulation set, grounding electrode insulation set, fixed spiral shell
Bolt；The Anodic is located at igniter center, is fixed in anodized insulation set；The lower anode has hollow knot
Structure is mounted in the mounting hole in anodized insulation set；The anodized insulation set realizes two for fixing Anodic and lower anode
The insulation of person；The anodized insulation set is mounted on grounding electrode, and the lower end of the upper grounding electrode and lower grounding electrode connect
It connects；Groove between the lower grounding electrode and upper grounding electrode is for installing grounding electrode insulation set；The fixing bolt is used
Relative position between fixed upper grounding electrode and anodized insulation set；The lower grounding electrode lower end has one to be used to install this etc.
The locating flange of ionic points firearm.According to actual needs, which also can be set in upper grounding electrode.
Since igniter is connected with engine chamber, exist in ionization space a, isolated area and ionization space b
Flammable air and fuel mixture.When work, Anodic and lower anode are powered respectively by power supply.Power supply is first with lower voltage
For Anodic power supply (such as: 10,000 volts or less), this anode no power at present；At the lower voltage, upper grounding electrode-anode is exhausted
Dielectric barrier discharge occurs between edge set-Anodic, the gas positioned at ionization space a ionizes under DC Electric Field,
Free electron and the nonequilibrium plasma with positive charge cation composition are generated, chemical reactivity improves.Due to medium
Barrier discharge also has flow field disturbance and heat effect to gas, and ionized gas moves downward in this role, passes through
Insulating space enters ionization space b.After entering ionization space b with the nonequilibrium plasma compared with high reaction activity, Anodic
Power-off, and supply voltage raising at this time (such as: it ten thousand volts of 1.5-2) and is lower anode supply, anode connects under under action of high voltage
Arc discharge occurs between ground electrode.While lower anodal closure, the air duct in lower anode is passed through air, this part is empty
Gas is not involved in ionization reaction, and role is to cool down for electrode, and generate disturbance to the flow field of nozzle to improve burning.Due to
The reactivity of gaseous mixture has improved at this time, therefore igniting and combustion reaction occur rapidly.Flame will be with large volume flame torch
Form gone out from spout, into engine chamber, ignite and be located at the indoor flammable air and fuel mixture of burning.
In entire discharge process, due to the presence of grounding electrode insulation set, ionization space a and ionization space b is completely cut off.
Therefore, dielectric barrier discharge will not occur between lower grounding electrode-anodized insulation set-anode.
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:
Crankshaft position sensor judges crank position, if current crank angle does not arrive setting value, continues to judge；If having arrived
Setting value then instructs power supply output low pressure discharge by ECU.
After power supply is connected to electric discharge instruction, a certain lower voltage U1 is exported to Anodic, is denoted as time t1.At this point, Anodic
It discharges with upper grounding electrode, forms dielectric barrier discharge in ionization space a, the gas in ionization space a is ionized to
Nonequilibrium 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, Anodic power-off.At this point, ECU refers to power supply output electrion
It enables, the downward anode of power supply exports a certain high voltage U2 (U2 > U1)；At this point, lower anode and lower grounding electrode discharge, it is empty in ionization
Between arc discharge is formed in b, the nonequilibrium plasma in ionization space b with very high reaction activity is ignited, and is burnt
Reaction starts；Flame goes out spout in the form of flame torch, enters main chamber.While lower anode discharge, ECU output control
System instruction, the air duct of downward anode are passed through air, cooling for lower anode, this partial air is gone out spout, penetrated to flame
It flows flow field and generates disturbance, promote combustion efficiency.
ECU reads cylinder pressure sensor signal, if cylinder pressure p is 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
To power source output command, with U2+ Δ U to lower anode discharge, and continue to read cylinder pressure signal, until lighting a fire successfully；If working as
Discharge voltage still judges loss of ignition when increasing to setting value U3 (U3 > U2) always, to guarantee that ignitor terminates safely electric discharge,
This circulation is no longer lighted a fire.
(2) in the control method of other engines and burner specifically:
ECU issues low pressure discharge instruction to power supply.After power supply is connected to electric discharge instruction, a certain lower voltage is exported to Anodic
U1 is denoted as time t1.At this point, Anodic and upper grounding electrode discharge, dielectric barrier discharge is formed in ionization space a, is located at
Gas in ionization space a is ionized to nonequilibrium plasma.It moves downward with that is, being ionized gas, passes through through the Δ t time
Insulating space enters ionization space b.
In t1+ time Δt, low pressure discharge instruction is terminated, Anodic power-off.At this point, ECU refers to power supply output electrion
It enables, the downward anode of power supply exports a certain high voltage U2 (U2 > U1).At this point, lower anode and lower grounding electrode discharge, it is empty in ionization
Between arc discharge is formed in b, the nonequilibrium plasma in ionization space b with very high reaction activity is ignited, and is burnt
Reaction starts.Flame goes out spout in the form of flame torch, enters main chamber.While lower anode discharge, ECU output control
System instruction, the air duct of downward anode are passed through air, cooling for lower anode, this partial air is gone out spout, penetrated to flame
It flows flow field and generates disturbance, promote 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 lower anodal opening, ignition process terminates.If temperature T is less than T1, then it is assumed that
Loss of ignition, ECU is to power source output command at this time, with U2+ Δ U to lower anode discharge, and continues to read temperature signal, until point
Until igneous function；If still judging loss of ignition when discharge voltage increases to always setting value U3 (U3 > U2), to guarantee ignition power
Extremely safety terminates electric discharge, and exports 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 (7)
1. a kind of double discharge mode plasma igniters with hollow vent anode, which is characterized in that including Anodic, under
Anode, upper grounding electrode, lower grounding electrode, anodized insulation set, grounding electrode insulation set；The upper grounding electrode and lower ground connection electricity
Extremely it is connected, the anodized insulation is placed in grounding electrode, and Anodic is embedded in the wall body of anodized insulation set；The lower sun
Pole includes a sections and ontology b sections of ontology, and described ontology a sections are mounted in the mounting hole of anodized insulation set, and b sections of ontology are mounted on down
In grounding electrode；Opened up in the junction of lower grounding electrode and upper grounding electrode fluted, the groove is located at lower grounding electrode
Inner wall on, grounding electrode insulation set installation in a groove；An ionization is formed between the upper grounding electrode and anodized insulation set
Space a, forms isolated area between grounding electrode insulation set and b sections of ontology of lower anode, b sections of ontology of lower anode are electric with lower ground connection
Ionization space b is formed between pole, the ionization space a, isolated area are connected with ionization space b.
2. a kind of double discharge mode plasma igniters with hollow vent anode according to claim 1, feature
It is, the application further includes fixing bolt, for the relative position between fixed upper grounding electrode and anodized insulation set.
3. a kind of double discharge mode plasma igniters with hollow vent anode according to claim 1, feature
It is, the lower anode has hollow structure, and the hollow structure is air duct.
4. a kind of double discharge mode plasma igniters with hollow vent anode according to claim 1, feature
It is, ionization space b further includes lower anode bottom space.
5. a kind of double discharge mode plasma igniters with hollow vent anode according to claim 1, feature
It is, the Anodic is located at plasma igniter center.
6. a kind of double discharge mode plasma igniters with hollow vent anode according to claim 1, feature
It is, the lower grounding electrode lower part is equipped with one for installing the locating flange of the plasma igniter.
7. a kind of double discharge mode plasma igniters with hollow vent anode according to claim 1, feature
It is, the upper grounding electrode top is equipped with one for installing the locating flange of the plasma igniter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258061.2A CN109253016A (en) | 2018-10-26 | 2018-10-26 | A kind of double discharge mode plasma igniters with hollow vent anode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258061.2A CN109253016A (en) | 2018-10-26 | 2018-10-26 | A kind of double discharge mode plasma igniters with hollow vent anode |
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| Publication Number | Publication Date |
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| CN109253016A true CN109253016A (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811258061.2A Withdrawn CN109253016A (en) | 2018-10-26 | 2018-10-26 | A kind of double discharge mode plasma igniters with hollow vent anode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145400A (en) * | 2019-05-21 | 2019-08-20 | 大连民族大学 | A kind of double mode plasma igniter |
-
2018
- 2018-10-26 CN CN201811258061.2A patent/CN109253016A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145400A (en) * | 2019-05-21 | 2019-08-20 | 大连民族大学 | A kind of double mode plasma igniter |
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Application publication date: 20190122 |
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| WW01 | Invention patent application withdrawn after publication |