CN106549305B - A kind of spark plug - Google Patents
A kind of spark plug Download PDFInfo
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- CN106549305B CN106549305B CN201510604896.9A CN201510604896A CN106549305B CN 106549305 B CN106549305 B CN 106549305B CN 201510604896 A CN201510604896 A CN 201510604896A CN 106549305 B CN106549305 B CN 106549305B
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- shell
- flow directing
- directing insert
- spark plug
- release portion
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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 the insulator；The shell is hollow columnar, and the shell is set in the surface of the insulator；The flow directing insert is fixed in the 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 the shell, the flow directing insert rear end is also connected with a release portion；The grounding electrode is arranged in the fire jetting hole front end.Spark plug of the invention avoids the case where central electrode deposit occurs and is corroded；Flow directing insert can be improved the ignition effectiveness and reflux efficiency of spark plug, improve 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, grounding electrode.The insulator has the axis hole extended in the axial direction；The central electrode is inserted through described exhausted
The axis hole and exposed end of edge body；The shell is hollow columnar, and the shell is set in the surface of the insulator；It is described to lead
Stream plug-in unit 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 has the fire jetting hole through its front/rear end, and the aperture of fire jetting hole front end is greater than the aperture of rear end, described
Flow directing insert rear end is also connected with a release portion, and the release portion is funnel structure, the rear end at slot end and the flow directing insert
Connect, release portion rear end, which extends, protrudes from the shell nozzle end；The grounding electrode is arranged in the fire jetting hole front end
The firing end portion with spark-discharge gap is formed between portion, and the end of central electrode.
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.Also, the setting in the release portion can further speed up the combustion gas point of arrival
The speed and spark in fire end portion are discharged to the speed of internal combustion engine cylinders.
Further, the interface aperture gross area of the release portion slot end and the flow directing insert rear end is greater than the ground connection
The gross area in gap between electrode and central electrode.
Further, the wide mouth end with the shell in the release portion are not attached to.
Alternatively, the wide mouth end in the release portion is connect with the shell port inner wall by least two connection units.
Alternatively, airtight connection between release portion wide mouth end and shell port end face, the side wall in the release portion
On be provided with water conservancy diversion through-hole.
Further, the grounding electrode is annulus or polygon, before the grounding electrode is connected to the flow directing insert
Hold the inner wall of fire jetting hole.
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.
Further, at least one deflector hole is provided on the side wall of the flow directing insert.The deflector hole is distributed in described
It on flow directing insert side wall, communicates fire jetting hole with water conservancy diversion through-hole, ensure that circulation of the combustion gas in spark plug, improve internal combustion engine
Efficiency of combustion.
Alternatively, the front end of the flow directing insert and the inner walls airtight connection；It is set on the side wall of the flow directing insert
It is equipped at least one deflector hole.Such structure design, is further ensured that circulation of the combustion gas between flow-guiding channel and fire jetting hole
Circulation.
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 spark plug configuration schematic diagram of the embodiment of the present invention 3.
Fig. 4 is the connection schematic diagram of flow directing insert and grounding electrode shown in Fig. 3.
Fig. 5 is the structural schematic diagram of another deformation spark plug of the invention.
Fig. 6 is the structural schematic diagram of second of deformation spark plug of the invention.
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 of spark plug 300 shown in Fig. 3 and the connection knot of grounding electrode 380 please refer to Fig. 4
Structure schematic diagram.The flow directing insert 360 is hollow round table structure, and the fire jetting hole through its front/rear end is provided on axis
362, the aperture of the front end of the fire jetting hole 362 of the flow directing insert 360 is greater than the aperture of the rear end 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.
The rear end of the flow directing insert 360 is also connected with a release portion 370, and the release portion 370 is funnel structure, described to lead
The slot end for flowing the frustum cone structure of plug-in unit 360 connects with the slot end in the release portion 370, the wide mouth end in the release portion 370
Positioned at the open end of shell 340, the wide port of the frustum cone structure and the central electrode 320 are opposite.The flow directing insert 360
Outside, between the outside of release portion 370 and 340 inner wall of shell form an annular flow-guiding channel A.
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.The gross area in gap is less than described between the grounding electrode 380 and the central electrode 320
The gross area in the formed aperture of interface 369 of 360 frustum cone structure of flow directing insert and 370 funnel structure of release portion.By connecing
The setting of 360 size of ground electrode 380 and flow directing insert, the primary air after being able to guide explosion is to cylinder body direction quick release, simultaneously
Due to internal and external pressure difference, fuel can be continuously replenished by flow directing insert 360 to be reached in firing end portion, forms spark sustained firing
Effect overcomes the disadvantage of mixed gas circulation difference in the prior art.
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 are as follows: 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.
As to further improvement of this embodiment, referring to Fig. 5, in the rear end in the release portion 370 and shell 340
At least two connection units 367 are set between wall, described 367 one end of connection unit is connect with 340 port inner wall of shell, and
Or formation certain angle, Connection Release portion 370 and shell 340 vertical with 340 inner wall of shell, the adjacent connection unit
Hollow out between 367；Alternatively, referring to Fig. 6, closed between 340 port end face of 370 rear end face of release portion and the shell
Connection, and water conservancy diversion through-hole 366a is set on the funnel structure side wall in the release portion 370, the fire jetting hole 362 and water conservancy diversion are logical
Road A can be communicated by deflector hole 366 and water conservancy diversion through-hole 366a, improved combustion gas and circulated effect in spark plug space
Rate further improves burning efficiency of internal combustion engine.
As a kind of distressed structure of the invention, the rear end in the release portion 370 protrudes from the open end of shell 340,
Ignition phase, combustion gas can enter firing end portion quickly through the rear end in the release portion 370 for protruding from shell 340, and in fire
In the flower release stage, the cylinder body of internal combustion engine can be accurately entered by the rear end in the release portion 370.
Compared with the existing technology, 320 front end of central electrode of spark plug 300 of the invention is provided with flow directing insert 360, keeps away
Exempt to improve its service life the case where occurring deposit on central electrode 320 and leading to its corrosion.Also, it is of the invention
Flow directing insert 360 and shell 340 use and process the processing method fixed in fitting respectively, easy to accomplish.After flow directing insert 360
End one release portion 370 of connection, the drainage speed of combustion gas when can further increase plug ignition and the jet velocity of spark,
It can further improve the ignition effectiveness of spark plug.
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 (7)
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, and the flow directing insert rear end also connects
A release portion is met, the release portion is funnel structure, and slot end connects with the rear end of the flow directing insert, behind the release portion
End, which extends, protrudes from the shell nozzle end；The interface aperture gross area at the release portion slot end and the flow directing insert rear end
Greater than the gross area in gap between the grounding electrode and central electrode；At least one is provided on the side wall of the flow directing insert
Deflector hole is provided with water conservancy diversion through-hole on the side wall in the release portion；Grounding electrode setting in the fire jetting hole front end, with
The firing end portion with spark-discharge gap is formed between the end of central electrode.
2. spark plug according to claim 1, it is characterised in that: the wide mouth end in the release portion and the shell not phase
Even.
3. spark plug according to claim 1, it is characterised in that: in the wide mouth end in the release portion and the shell port
Wall is connected by least two connection units.
4. spark plug according to claim 1, it is characterised in that: release portion wide mouth end and shell port end face
Between airtight connection.
5. spark plug described in any claim in -4 according to claim 1, it is characterised in that: the grounding electrode is annulus
Or polygon, the grounding electrode are connected to the inner wall of flow directing insert front end fire jetting hole.
6. spark plug according to claim 5, it is characterised in that: the front end of the flow directing insert passes through at least two connections
Bar is connect with the inner walls, hollow out between two adjacent connecting rods.
7. spark plug according to claim 5, it is characterised in that: the front end of the flow directing insert and the inner walls are close
Close connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604896.9A CN106549305B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604896.9A CN106549305B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106549305A CN106549305A (en) | 2017-03-29 |
| CN106549305B true CN106549305B (en) | 2019-02-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510604896.9A Active CN106549305B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
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| Country | Link |
|---|---|
| CN (1) | CN106549305B (en) |
Citations (7)
| 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 |
| CN103779788A (en) * | 2014-01-29 | 2014-05-07 | 张蝶儿 | Spark plug and ignition system of internal combustion engine using spark plug |
| CN103956654A (en) * | 2014-05-09 | 2014-07-30 | 张蝶儿 | Sparking plug |
| CN204205284U (en) * | 2014-09-30 | 2015-03-11 | 张蝶儿 | A kind of spark 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 CN201510604896.9A patent/CN106549305B/en active Active
Patent Citations (7)
| 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 |
| CN103779788A (en) * | 2014-01-29 | 2014-05-07 | 张蝶儿 | Spark plug and ignition system of internal combustion engine using spark plug |
| CN103956654A (en) * | 2014-05-09 | 2014-07-30 | 张蝶儿 | Sparking plug |
| CN204205284U (en) * | 2014-09-30 | 2015-03-11 | 张蝶儿 | A kind of spark plug |
| CN204205282U (en) * | 2014-10-31 | 2015-03-11 | 张蝶儿 | A kind of spark plug |
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| Publication number | Publication date |
|---|---|
| CN106549305A (en) | 2017-03-29 |
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