CN106549304B - A kind of spark plug - Google Patents
A kind of spark plug Download PDFInfo
- Publication number
- CN106549304B CN106549304B CN201510604880.8A CN201510604880A CN106549304B CN 106549304 B CN106549304 B CN 106549304B CN 201510604880 A CN201510604880 A CN 201510604880A CN 106549304 B CN106549304 B CN 106549304B
- Authority
- CN
- China
- Prior art keywords
- shell
- flow directing
- directing insert
- spark plug
- insulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012212 insulator Substances 0.000 claims abstract description 22
- -1 central electrode Substances 0.000 claims abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 19
- 238000010992 reflux Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000567 combustion gas Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
Landscapes
- Spark Plugs (AREA)
Abstract
A kind of spark plug, including insulator, central electrode, shell, flow directing insert and grounding electrode.The insulator has the axis hole extended in the axial direction；The central electrode is inserted through the axis hole and exposed end of insulator；The shell is hollow columnar, is set in the surface of insulator；The flow directing insert is fixed in shell, its front end and central electrode face, its rear end is located at the open end of shell, its center has the fire jetting hole through its front/rear end, the aperture of fire jetting hole front end is greater than the aperture of rear end, and annular flow-guiding channel is formed between the flow directing insert and shell, the flow directing insert rear end is also connected with a release portion, and the release portion includes the Ka Jiao of at least two rear ends for being connected to flow directing insert；The grounding electrode is arranged in fire jetting hole front end.Spark plug of the invention avoids the case where central electrode deposit occurs and is corroded, and can improve the ignition effectiveness and reflux efficiency of spark plug, improves the efficiency of combustion of internal combustion engine.
Description
Technical field
The present invention relates to a kind of igniting field of internal combustion engine more particularly to a kind of spark plugs.
Background technique
Internal combustion engine is the high compression combustion chamber burning that cylinder interior is directly inputted after mixing with air liquid or gaseous fuel
Outburst generates power, is a kind of heat engine for converting heat into mechanical energy.Spark plug is mounted on internal combustion engine, is used for combustion chamber
The igniter of interior mixed gas.
Referring to Fig. 1, it is the structural schematic diagram of spark plug in the prior art.The spark plug include a central electrode 132,
Insulator 134, shell 13 and grounding electrode 138.The insulator 134 is ceramics insulator, has the axis extended in the axial direction
Hole, the central electrode 132 are inserted through the axis hole of the insulator 134.The periphery of the insulator 134 is arranged in the shell 13.It should
Grounding electrode 138 is connect with the end of the shell 13, and is bent extension and central electrode 132 relatively, between central electrode 132
Form the gap of spark discharge.Electric arc is generated by the effect of pulse power between the central electrode 132 and grounding electrode 138,
And then the mixed gas of spark ignition surrounding them is generated, achieve the purpose that automatic ignition.
Since the working environment of spark plug is exceedingly odious, the central electrode 132 and grounding electrode 138 high temperature in the combustion chamber
The case where needing to light a fire many times under condition of high voltage, and will appear deposit on the electrode and lead to its corrosion, lead to spark plug
Deteriorate.In order to slow down the speed of worsening of spark plug, technical staff has carried out various improvement to spark plug.Such as by improving electrode material
The corrosion resistance of material increases number of electrodes to overcome the etching problem of electrode.But improve the corrosion resistance of electrode material
It can need to propose new electrode material, the etching problem of electrode can not be changed using existing electrode material；For
Multiple electrodes are set simultaneously, since multiple electrode equally exposes to the open air in a combustion chamber, it will it suffers erosion simultaneously, it can not be from root
The anticorrosive of electrode is solved the problems, such as in sheet.
Or central electrode and grounding electrode are arranged in the cavity of shell.Referring to Fig. 2, it is in the prior art
The structural schematic diagram of another spark plug.The spark plug includes shell and the insulated ceramic core that is fixedly installed in shell；The insulation porcelain
In-core is equipped with central electrode 21；The upper end of the central electrode stretches out insulated ceramic core and forms an electric discharge end 211；The shell has
One flame chamber 11, it is intracavitary which is in flame；The ground connection electricity close to electric discharge end is provided in the flame chamber 11
Pole 23.The discharge ignition apparatus that central electrode and grounding electrode are constituted is set in flame chamber 11, is first lighted in flame chamber 11
Air mixture, recycle flame chamber 11 spray flame ignition combustion chambers of internal combustion engines mixed gas, create one efficiently
Point fire environment, and reduce the deposition velocity of deposit on electrode.But for being arranged central electrode and grounding electrode in shell
In the cavity of body, the distance that the spark that two electrodes can be made to generate enters combustion chamber increases, and then make the mixed gas of combustion chamber
Burning time generates delay, since the compression stroke of internal combustion engine operation and the time of expansion stroke are set time, then gaseous mixture
The burning time of body shortens, and reduces the efficiency of combustion of internal combustion engine to a certain extent, is unfavorable for energy conservation and environmental protection.And ground connection electricity
Ignition gap 25 between the electric discharge end 211 of pole 23 and central electrode is of crucial importance, it is necessary within certain distance in favor of
It discharges, but the too small mixed gas that is unfavorable in induction stroke of the ignition gap 25 enters the discharging gap, to a certain degree
On also reduce the ignition effectiveness of spark plug.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology and deficiency, and it is high and erosion-resisting to provide a kind of ignition effectiveness
Spark plug.
The present invention is achieved by the following technical solutions: a kind of spark plug, including insulator, central electrode, shell, leads
Flow plug-in unit and grounding electrode.The insulator has the axis hole extended in the axial direction；The central electrode is inserted through described
The axis hole and exposed end of insulator；The shell is hollow columnar, and the shell is set in the surface of the insulator；It is described
Flow directing insert is frustum cone structure, is fixed in the shell, and front end and central electrode face, its rear end is located at shell
Open end, center have through its front/rear end fire jetting hole, and the aperture of fire jetting hole front end be greater than rear end aperture, institute
It states and forms annular flow-guiding channel between flow directing insert and the shell, be provided at least one on the side wall of the flow directing insert and lead
Discharge orifice, the flow directing insert rear end are also connected with a release portion, and the release portion is connected to the flow directing insert including at least two
Rear end Ka Jiao；The grounding electrode is arranged in the fire jetting hole front end, and being formed between the end of central electrode has
The firing end portion of spark-discharge gap.
Compared with the existing technology, the igniting of shell is arranged in central electrode and grounding electrode by spark plug provided by the invention
It is intracavitary, corrosion resistance is made it have, and avoid part of fuel and remain in formation charcoal black stainss outside spark-plug body, more filled
That divides utilizes fuel, improves the utilization rate of fuel.Further, the structure of the flow directing insert can induction stroke promptly
Combustion gas is introduced to firing end portion, the efficiency of combustion of internal combustion engine is improved.
Further, the outer wall of the Ka Jiao in the release portion is bonded with the inner walls.
Further, it is arranged between the adjacent card angle fluted.And then the groove is connected to flow-guiding channel and fire jetting hole, protects
Demonstrate,prove combustion gas circulating in spark plug.
Further, the front end of the flow directing insert is connect by least two connecting rods with the inner walls, the phase
Hollow out between adjacent connecting rod.
Alternatively, the front end of the flow directing insert and the inner walls airtight connection.Such structure design, is further protected
Demonstrate,prove circulation of the combustion gas between flow-guiding channel and fire jetting hole.
In order to better understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of spark plug in the prior art.
Fig. 2 is the structural schematic diagram of another spark plug in the prior art.
Fig. 3 is the structural schematic diagram of spark plug of the invention.
Fig. 4 is the structural schematic diagram of flow directing insert shown in Fig. 3 and grounding electrode.
Specific embodiment
Referring to Fig. 3, it is the structural schematic diagram of spark plug of the invention.The spark plug 300 include insulator 310, in
Heart electrode 320, shell 340, flow directing insert 360 and grounding electrode 380.The insulator 310 is ceramics insulator, with edge
The axis hole that axis direction extends.The central electrode 320 is inserted through the axis hole and exposed end 322 of the insulator 310.Institute
Stating shell 340 is hollow structure, and is set in the surface of the insulator 310.
It is the flow directing insert 360 and the structural representation of grounding electrode 380 of spark plug shown in Fig. 3 please refer to Fig. 4
Figure.The flow directing insert 360 is hollow round table structure, and the fire jetting hole 362 through its front/rear end is provided on axis, described
The aperture of the front end 362a of the fire jetting hole 362 of flow directing insert 360 is greater than the aperture of the rear end 362b of the fire jetting hole 362.It is described
The front end of flow directing insert 360 is located inside shell 340, and rear end is located at the open end of shell 340；Before the flow directing insert 360
Rectify to 320 end 322 of central electrode, the end 322 of the central electrode 320 is set to the flame of the flow directing insert 360
The top in hole 362 extends in the fire jetting hole 362 of the flow directing insert 360.Outside and shell in the flow directing insert 360
An annular flow-guiding channel A is formed between internal wall.
The rear end of the flow directing insert 360 is also connected with a release portion 370, and the release portion 370 includes at least two connections
It is arranged fluted 374 between the card angle 372 of 360 rear end of flow directing insert, the adjacent card angle 372.The flow directing insert
360 372 side wall of card angle is bonded with 340 inner wall of shell, and the groove 374 makes the flow-guiding channel A and the fire jetting hole
362 communicate.The setting of card angle 372 and groove 374, is stably fixed on flow directing insert 360 further in the flow directing insert 360
Inside the shell 340, and groove 374 communicates flow-guiding channel A with fire jetting hole 362, guarantees combustion gas inside spark plug
Circulation.
The front end of 360 fire jetting hole of flow directing insert is arranged in the grounding electrode 380, and the grounding electrode is annulus
Or polygon.In the present embodiment, the grounding electrode 380 is annulus, and is connected to the flow directing insert by connecting rod 382
The inner wall of 360 front end fire jetting holes, being formed between the grounding electrode 380 and the end 322 of the central electrode 320 has spark
The firing end portion in the gap of electric discharge.
In the present invention, the flow directing insert 360 can be fixed in the shell 340 by three kinds of modes, one are as follows:
Flow directing insert 360 is fixed on 340 inner wall of shell, the phase by least two connecting rods by the front end of the flow directing insert 360
Hollow out between adjacent connecting rod；Secondly being, the front end of the flow directing insert 360 passes through at least two connecting rods for flow directing insert 360
It is fixed on 340 inner wall of shell, hollow out between the adjacent connecting rod is provided at least one on the side wall of the flow directing insert 360
A deflector hole 366；Thirdly are as follows: the inner wall airtight connection of the front end outer wall of the flow directing insert 360 and the shell 340, it is described
At least one deflector hole 366 is provided on the side wall of flow directing insert 360, the flow-guiding channel A passes through the deflector hole 366 and spray
Fire hole 362 communicates, and is further ensured that combustion gas can circulate between annular flow-guiding channel A and fire jetting hole 362.
Compared with the existing technology, the structure of flow directing insert 360 designs in spark plug 300 of the invention, avoids in middle electrocardio
The case where occurring deposit on pole 320 and leading to its corrosion, improves its service life.And 360 rear end of flow directing insert connects
One release portion 370, the setting of card angle 372 and groove 374 in the release portion 370 are stablized flow directing insert 360 further and are fixed
Inside the shell 340, and groove 374 communicates flow-guiding channel A with fire jetting hole 362, guarantees combustion gas inside spark plug
Circulation, spark dispersion release is improved in cylinder body by burning efficiency of internal combustion engine by groove 374.
The invention is not limited to above embodiment, if not departing from the present invention to various changes or deformation of the invention
Spirit and scope, if these changes and deformation belong within the scope of claim and equivalent technologies of the invention, then this hair
It is bright to be also intended to encompass these changes and deformation.
Claims (5)
1. a kind of spark plug, it is characterised in that: including insulator, central electrode, shell, flow directing insert and grounding electrode；It is described
Insulator has the axis hole extended in the axial direction；The central electrode is inserted through the axis hole and bared end of the insulator
Portion；The shell is hollow columnar, and the shell is set in the surface of the insulator；The flow directing insert is frustum cone structure,
It is fixed in the shell, and front end and central electrode face, its rear end are located at the open end of shell, and center has
Through the fire jetting hole of its front/rear end, and the aperture of fire jetting hole front end is greater than the aperture of rear end, the flow directing insert and the shell
Annular flow-guiding channel is formed between body, is provided at least one deflector hole, the flow directing insert on the side wall of the flow directing insert
Rear end is also connected with a release portion, and the release portion includes the Ka Jiao of at least two rear ends for being connected to the flow directing insert；It is described
Grounding electrode setting forms the igniting with spark-discharge gap in the fire jetting hole front end between the end of central electrode
End.
2. spark plug according to claim 1, it is characterised in that: in the outer wall and the shell of the Ka Jiao in the release portion
Wall fitting.
3. spark plug according to claim 2, it is characterised in that: be arranged between the adjacent card angle fluted.
4. spark plug described in any claim in -3 according to claim 1, it is characterised in that: the front end of the flow directing insert
It is connect by least two connecting rods with the inner walls, hollow out between two adjacent connecting rods.
5. spark plug described in any claim in -3 according to claim 1, it is characterised in that: the front end of the flow directing insert
With the inner walls airtight connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604880.8A CN106549304B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604880.8A CN106549304B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106549304A CN106549304A (en) | 2017-03-29 |
| CN106549304B true CN106549304B (en) | 2019-02-05 |
Family
ID=58365194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510604880.8A Expired - Fee Related CN106549304B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106549304B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7001634B2 (en) * | 2019-05-07 | 2022-01-19 | 日本特殊陶業株式会社 | Spark plug |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344014A (en) * | 1977-04-07 | 1982-08-10 | Nippon Soken, Inc. | Ignition spark plug |
| CN103746291A (en) * | 2014-01-29 | 2014-04-23 | 张蝶儿 | Sparking plug |
| CN103956654A (en) * | 2014-05-09 | 2014-07-30 | 张蝶儿 | Sparking plug |
| CN204205282U (en) * | 2014-10-31 | 2015-03-11 | 张蝶儿 | A kind of spark plug |
| CN104426057A (en) * | 2013-08-21 | 2015-03-18 | 张蝶儿 | Spark plug, and ignition system of internal combustion engine using same |
-
2015
- 2015-09-21 CN CN201510604880.8A patent/CN106549304B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344014A (en) * | 1977-04-07 | 1982-08-10 | Nippon Soken, Inc. | Ignition spark plug |
| CN104426057A (en) * | 2013-08-21 | 2015-03-18 | 张蝶儿 | Spark plug, and ignition system of internal combustion engine using same |
| CN103746291A (en) * | 2014-01-29 | 2014-04-23 | 张蝶儿 | Sparking plug |
| CN103956654A (en) * | 2014-05-09 | 2014-07-30 | 张蝶儿 | Sparking plug |
| CN204205282U (en) * | 2014-10-31 | 2015-03-11 | 张蝶儿 | A kind of spark plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106549304A (en) | 2017-03-29 |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190205 |