CN109209726A - The ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure - Google Patents
The ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure Download PDFInfo
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- CN109209726A CN109209726A CN201811258052.3A CN201811258052A CN109209726A CN 109209726 A CN109209726 A CN 109209726A CN 201811258052 A CN201811258052 A CN 201811258052A CN 109209726 A CN109209726 A CN 109209726A
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- anode
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- grounding electrode
- long
- ionization space
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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
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches 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)
- Spark Plugs (AREA)
Abstract
The ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure, belong to dynamic field, in order to solve to realize dielectric barrier discharge and arc discharge, short anode is individually powered with long anode by power supply, igniting starting, power supply is powered with lower voltage so that dielectric barrier discharge occurs by being isolated between short anode and grounding electrode, and, it is isolated between long anode and grounding electrode by anodized insulation positioning sleeve and dielectric barrier discharge occurs, nonequilibrium plasma is generated in the first ionization space, dielectric barrier discharge generates flow field disturbance and heating to gas, ionized gas moves downwardly to the second ionization space, supply voltage increases and only to long anode supply, so that arc discharge occurs between grounding electrode and long anode, igniting and combustion reaction occur rapidly for the gaseous mixture in the second ionization space, Spatially consider that its compactedness is again necessary and realizes that two kinds of electric discharges can just have both two kinds of effects so that its internal structure is necessarily bias.
Description
Technical field
The invention belongs to dynamic fields, are related to a kind of double discharge mode plasma igniters of eccentric Double-positive-pole structure
Ignition 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.
Existing engine spark plug configuration is as shown in Figure 1, using thermal equilibrium plasma discharge principle, one in structure
As be made of a central electrode and the one or several lateral electrodes being closer with it.It is electric centered on ignition coil when work
Pole power supply, voltage are up to ten thousand volts of 1.5-2.Under action of high voltage between contre electrode and lateral electrode, gas is breakdown, at center
High temperature discharge channel is formed in small space between electrode and lateral electrode, igniting and burning start.
Often with very high temperature rise when existing spark-discharge, it is low and influence electrode to easily lead to ignition energy utilization rate
Service life；Ignition range is only located at the small space between central electrode and lateral electrode, applied to large bore engine or is not easy a little
When fuel (such as natural gas) of combustion, igniting less reliable is easily led to since ignition energy is too small.
Summary of the invention
In order to solve the problem of to realize dielectric barrier discharge and arc discharge and spatially consider its compactedness, this
Invention proposes a kind of following scheme: ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure,
Short anode is individually powered with long anode by power supply, igniting starting, and power supply is powered with lower voltage so that short anode and ground connection
Dielectric barrier discharge is occurred by isolation between electrode, and, it is isolated between long anode and grounding electrode by anodized insulation positioning sleeve
And dielectric barrier discharge occurs, nonequilibrium plasma is generated in the first ionization space, dielectric barrier discharge generates stream to gas
Field disturbance and heating, ionized gas moves downwardly to the second ionization space, and supply voltage, which increases, simultaneously only supplies long anode
Electricity, so that arc discharge occurs between grounding electrode and long anode, the gaseous mixture in the second ionization space occurs rapidly a little
Fire and combustion reaction；
The forming method of first ionization space, the second ionization space: the positioning ring of anodized insulation positioning sleeve is outputed short
Anode aperture, long anode aperture, and by forming the short of the downward closed short anode of accommodating with insulating materials below short anode aperture
Slot, from long anode aperture below with insulating materials form the long anodized insulation side wall to lower open mouth, by short anode limiting in short slot
Interior, long anode stretches out areole and simultaneously extends to outlet section, and maintains section in the first diameter value, between short slot, insulative sidewall, grounding electrode
The first ionization space of hollow formation between inner wall；Section, the second diameter value gradually segment, long anode and grounding electrode are maintained in the second diameter value
The second ionization space of hollow formation between inner wall.
The utility model has the advantages that igniter separates to realize that DBD electric discharge is discharged with other, and two electrodes are set to realize respectively
Dielectric barrier discharge and arc discharge spatially consider that its compactedness is again necessary and realize two kinds of electric discharges, so that its internal junction
Structure is necessarily bias, can just have both two kinds of effects, i.e. side grounding electrode increases horizontal direction width and formed, side grounding electrode
Horizontal direction width it is almost the same.The present invention uses dielectric barrier discharge-arc discharge combined discharge mode, can will be non-flat
Weigh plasma lean flammability limit is wide, reactivity is big and the advantages such as the operating air pressure height of thermal equilibrium plasma combine
Come, achievees the purpose that realize high energy, stable ignition within the scope of wide fuel air ratio.
Detailed description of the invention
Fig. 1 available engine spark plug typical structure diagram；
Fig. 2 igniter structure schematic diagram of the present invention；
Fig. 3 igniter is applied to ignition control block diagram when internal combustion engine；
Fig. 4 igniter is applied to ignition control block diagram when other engines and burner.
1. short anode, 2. long anodes, 3. locating flanges, 4. anodized insulation separation sleeves, 5. grounding electrodes, 6. ring walls, 7.
One ionization space, 8. second ionization spaces, 9. first diameter values maintain section, and gradually segment, 11. second diameter values maintain 10. first diameter values
Section, 12. second diameter values gradually segment, 13. short slots, 14. insulative sidewalls.
Specific embodiment
Embodiment 1: it to solve the problems, such as that existing spark plug/ignitor is applied on the engine of large space burning room, goes forward side by side
The problems such as one step solves small ignition energy when application on natural gas engine, igniting poor reliability, ignition energy utilization rate is low, this
The following technical solutions are proposed: a kind of double discharge mode plasma igniters with eccentric Double-positive-pole structure, the program for invention
Structure is as shown in Fig. 2, include one short anode, 1, one long 2, anodized insulation positioning sleeves of anode, a grounding electrode 5.Institute
It states anodized insulation positioning sleeve to be mounted in grounding electrode 5, the short anode 1 and long anode 2 are respectively arranged in anodized insulation positioning
In the mounting groove and mounting hole of set, wherein short anode 1 is all wrapped up by anodized insulation positioning sleeve, a part of long anode 2 is positive
Pole insulating positioning sleeve package.There is a locating flange 3 for being used to install the plasma igniter in 5 upper end of grounding electrode.According to
It needs, which may also set up in other positions.
Embodiment 2: a kind of double discharge mode plasma igniters with eccentric Double-positive-pole structure, including shell, length
Anode 2, short anode 1, anodized insulation positioning sleeve and grounding electrode 5 are installed with grounding electrode 5 in shell, and grounding electrode 5, which encloses, to be connect
Form the hollow cylinder of indent, the hollow cylinder from top to bottom and diameter value and is divided into two, and top, lower part in gradually small trend
Between connection horizontally ring wall is formed by grounding electrode 5 due to diameter value quickly reduces, the diameter value reduction of the lower part be by
The grounding electrode 5 of side in the short slot 13 increases horizontal direction width and is formed, the grounding electrode 5 of 14 side of insulative sidewall
Horizontal direction width is almost the same.There is the first diameter value to maintain section 9, the first diameter value gradually segment 10, the second diameter value dimension for the lower part
Section 11, the second diameter value gradually segment 12 are held, the anodized insulation positioning sleeve includes the positioning ring 6 that can be positioned with ring wall snapping,
The positioning ring 6 outputs short 1 aperture of anode, 2 aperture of long anode, and by forming downward envelope with insulating materials below short 1 aperture of anode
The short slot 13 of the short anode 1 of accommodating closed, from long 2 aperture of anode below formed with insulating materials to the long anode 2 of lower open mouth and insulate
Side wall 14, short anode 1 are limited in short slot 13, and long anode 2 stretches out areole and extends to outlet section, and are maintained in the first diameter value
Section 9, the first ionization space of hollow formation 7 between short slot 13, insulative sidewall 14, between 5 inner wall of grounding electrode are maintained in the second diameter value
The 11, second diameter value of section gradually segment 12, the second ionization space of hollow formation 8 between 5 inner wall of long anode 2 and grounding electrode are described
It is to be increased horizontal direction width by the grounding electrode 5 of the side in the short slot 13 and formed, the insulation sides that the diameter value of lower part, which reduces,
The horizontal direction width of the grounding electrode 5 of 14 side of wall is almost the same.Igniter separates to realize that DBD electric discharge is discharged with other, and
Two electrodes are set to realize dielectric barrier discharge and arc discharge respectively, spatially considers that its compactedness is again necessary and realizes
Two kinds of electric discharges can just have both two kinds of effects so that its internal structure is necessarily bias, i.e. side grounding electrode 5 increases horizontal direction
Width and formed, the horizontal direction width of side grounding electrode 5 is almost the same.
The self-insulating side wall 14 of long anode 2, which stretches out, simultaneously extends to outlet section, it is decrescence small in outlet section its diameter value and as
Outlet section forms tip.The part that the short anode 1 is located at 6 upper end of positioning ring has annular stop ring or bolt to be connected to
The upper surface of positioning ring 6.The part that the long anode 2 is located at 6 upper end of positioning ring has annular stop ring or bolt to be clamped
In the upper surface of positioning ring 6.The periphery of the grounding electrode 5 on the top forms installation bolt hole, and installs the outer of bolt hole
Enclose installation locating flange 3.
Ignition method is as follows, and short anode is individually powered with long anode by power supply, and igniting starting, power supply is with lower voltage
Power supply so that dielectric barrier discharge occurs by being isolated between short anode and grounding electrode, and between long anode and grounding electrode by
Anodized insulation positioning sleeve is isolated and dielectric barrier discharge occurs, and generates nonequilibrium plasma, medium resistance in the first ionization space
Gear electric discharge generates flow field disturbance and heating to gas, and ionized gas moves downwardly to the second ionization space, supply voltage
It increases and only to long anode supply, so that arc discharge occurs between grounding electrode and long anode, in the second ionization space
Gaseous mixture occur rapidly igniting and combustion reaction.The forming method of first ionization space, the second ionization space: anode is exhausted
The positioning ring of edge positioning sleeve outputs short anode aperture, long anode aperture, and from below short anode aperture with insulating materials formed to
Under the short anode of closed accommodating short slot, from long anode aperture below the long anodized insulation side to lower open mouth is formed with insulating materials
Wall, by short anode limiting in short slot, long anode stretches out areole and extends to outlet section, and maintains section in the first diameter value, short
The first ionization space of hollow formation between slot, insulative sidewall, between grounding electrode inner wall；Section, the second diameter value are maintained in the second diameter value
Gradually segment, the second ionization space of hollow formation between long anode and grounding electrode inner wall.The above-mentioned diameter value addressed refers to cylinder
The value of diameter or radius.
Embodiment 3: this programme is related to igniter mainly by a short anode, a long anode, an anodized insulation positioning
Set, a grounding electrode composition, can be igniter described in embodiment 1 or 2, ignition method is as follows:
Since igniter and engine chamber are connected, there are the mixing of flammable air-fuel in ionization space
Gas.
Short anode is individually powered with long anode by power supply.When work, power supply first with lower voltage power supply (such as: 1
Ten thousand volts or less)；At the lower voltage, short anode-anodized insulation positioning sleeve-grounding electrode, long anode-anodized insulation positioning sleeve-
Dielectric barrier discharge occurs between grounding electrode, dielectric barrier discharge betides in the first ionization space.Positioned at the first ionization
The gas in space ionizes under DC Electric Field, generates free electron and with the non-equilibrium of positive charge cation composition
Plasma, chemical reactivity improve.Since voltage is lower at this time, arc discharge does not occur in the second ionization space.
Since dielectric barrier discharge also has flow field disturbance and heat effect to gas, ionized gas acts on herein
Under move downward, by insulating space enter the second ionization space.
After entering the second ionization space with the nonequilibrium plasma compared with high reaction activity, supply voltage raising (such as:
Ten thousand volts of 1.5-2), arc discharge occurs between action of high voltage grounding electrode and long anode (short anode is no longer powered at this time).
Since the reactivity of gaseous mixture at this time has improved, igniting and combustion reaction occur rapidly.Flame will be with large volume fire
The form of torch is gone out from spout, into engine chamber, is ignited and is located at indoor flammable air-fuel mixing of burning
Gas.
The control strategy of the program is:
(1) piston-mode motor (reciprocating or rotary piston)
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 U is exported to short anode1, it is denoted as time t at this time1.At this point, short sun
Pole, long anode top and grounding electrode discharge, and form dielectric barrier discharge in the first ionization space, are located at the first ionization space
Interior gas is ionized to nonequilibrium plasma.It is moved downward with that is, being ionized gas, passes through insulating space through the Δ t time
Into the second ionization space.
In t1+ time Δt, low pressure discharge instruction terminate, short anode, long anodal opening.At this point, ECU exports height to power supply
Electric instruction is pressed, power supply exports a certain high voltage U to long anode2(U2>U1).At this point, long anode and grounding electrode discharge,
Arc discharge is formed in second ionization space, and there is the nonequilibrium plasma of very high reaction activity in the second ionization space
It is ignited, combustion reaction starts.Flame goes out spout in the form of flame torch, enters main chamber.
ECU reads cylinder pressure sensor signal.If cylinder presses p to be greater than a certain setting value p1, then it is assumed that it lights 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 continues to read cylinder pressure signal to long anode discharge, until lighting a fire successfully；If working as
Discharge voltage increases to always setting value U3(U3>U2) when still judge loss of ignition, for guarantee ignitor safely terminate electric discharge,
This circulation is no longer lighted a fire.
(2) other engines and burner
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 short anode
U1, it is denoted as time t at this time1.At this point, short anode and grounding electrode discharge, dielectric barrier discharge is formed in the first ionization space,
Gas in the first ionization space is ionized to nonequilibrium plasma.It is moved downward with that is, being ionized gas, through Δ t
Time enters the second ionization space by insulating space.
In t1+ time Δt, low pressure discharge instruction terminate, short anodal opening.At this point, ECU refers to power supply output electrion
It enables, power supply exports a certain high voltage U to long anode2(U2>U1).At this point, long anode and grounding electrode discharge, in the second ionization
Arc discharge is formed in space, the nonequilibrium plasma in the second ionization space with very high reaction activity is ignited,
Combustion reaction starts.Flame goes out spout in the form of flame torch, enters main chamber.
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 long 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 continues to read temperature signal to long anode discharge, until point
Until igneous function；If when discharge voltage increases to always setting value U3(U3>U2) when still judge loss of ignition, for guarantee ignition power
Extremely safety terminates electric discharge, and exports failure alarm signal.
The preferable specific embodiment of the above, only the invention, but the protection scope of the invention is not
It is confined to this, anyone skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical solution of creation and its inventive concept are subject to equivalent substitution or change, should all cover the invention protection scope it
It is interior.
Claims (1)
1. a kind of ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure, which is characterized in that
Short anode (1) is individually powered with long anode (2) by power supply, and igniting starting, power supply is powered with lower voltage so that short anode
(1) dielectric barrier discharge occurs by being isolated between grounding electrode (5), and, between long anode (2) and grounding electrode (5) by
Anodized insulation positioning sleeve is isolated and dielectric barrier discharge occurs, and generates nonequilibrium plasma, medium in the first ionization space (7)
Barrier discharge generates flow field disturbance and heating to gas, and ionized gas moves downwardly to the second ionization space (8), power supply
Voltage is increased and is only powered to long anode (2), so that arc discharge occurs between grounding electrode (5) and long anode (2), positioned at the
Igniting and combustion reaction occur rapidly for the gaseous mixture in two ionization spaces (8)；
First ionization space (7), the second ionization space (8) forming method: the positioning ring (6) of anodized insulation positioning sleeve is opened
Short anode (1) aperture, long anode (2) aperture out, and by forming downward closed appearance with insulating materials below short anode (1) aperture
The short slot (13) for setting short anode (1), from long anode (2) aperture below formed with insulating materials it is exhausted to the long anode (2) of lower open mouth
Short anode (1) is limited in short slot (13) by edge side wall (14), and long anode (2) is stretched out areole and extended to outlet section, and
First diameter value maintains section (9), and the hollow formation first between short slot (13), insulative sidewall (14), between grounding electrode (5) inner wall ionizes
Space (7)；Section (11), the second diameter value gradually segment (12) are maintained in the second diameter value, between long anode (2) and grounding electrode (5) inner wall
The second ionization space of hollow formation (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258052.3A CN109209726A (en) | 2018-10-26 | 2018-10-26 | The ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811258052.3A CN109209726A (en) | 2018-10-26 | 2018-10-26 | The ignition method of double discharge mode plasma igniters with eccentric Double-positive-pole structure |
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| CN109209726A true CN109209726A (en) | 2019-01-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541292A (en) * | 1991-08-06 | 1993-02-19 | Ishikawajima Harima Heavy Ind Co Ltd | Self cooling type plasma torch |
| US5423306A (en) * | 1993-10-22 | 1995-06-13 | Trigger, Deceased; Vernon A. | Internal plasma-combustion engine system |
| US20080201063A1 (en) * | 2005-10-25 | 2008-08-21 | Gm Global Technology Operations, Inc. | Combustion control method for a direct-injection controlled auto-ignition combustion engine |
| CN103277231A (en) * | 2013-03-18 | 2013-09-04 | 中国人民解放军空军工程大学 | Aero-engine air rotational flow plasma igniter |
| CN104612879A (en) * | 2015-01-19 | 2015-05-13 | 西安航天动力研究所 | High-back-pressure plasma igniter |
-
2018
- 2018-10-26 CN CN201811258052.3A patent/CN109209726A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541292A (en) * | 1991-08-06 | 1993-02-19 | Ishikawajima Harima Heavy Ind Co Ltd | Self cooling type plasma torch |
| US5423306A (en) * | 1993-10-22 | 1995-06-13 | Trigger, Deceased; Vernon A. | Internal plasma-combustion engine system |
| US20080201063A1 (en) * | 2005-10-25 | 2008-08-21 | Gm Global Technology Operations, Inc. | Combustion control method for a direct-injection controlled auto-ignition combustion engine |
| CN103277231A (en) * | 2013-03-18 | 2013-09-04 | 中国人民解放军空军工程大学 | Aero-engine air rotational flow plasma igniter |
| CN104612879A (en) * | 2015-01-19 | 2015-05-13 | 西安航天动力研究所 | High-back-pressure plasma igniter |
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Application publication date: 20190115 |