CN106549306B - A kind of spark plug - Google Patents
A kind of spark plug Download PDFInfo
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- CN106549306B CN106549306B CN201510604898.8A CN201510604898A CN106549306B CN 106549306 B CN106549306 B CN 106549306B CN 201510604898 A CN201510604898 A CN 201510604898A CN 106549306 B CN106549306 B CN 106549306B
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- directing insert
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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 grounding electrode setting forms the firing end portion with spark-discharge gap in the fire jetting hole front end between the end of central electrode.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 10 in the prior art.The spark plug 10 includes a central electrode
11, insulator 12, shell 13 and grounding electrode 14.The insulator 12 is ceramics insulator, has the axis extended in the axial direction
Hole, the central electrode 11 are inserted through the axis hole of the insulator 12.The periphery of the insulator 12 is arranged in the shell 13.The ground connection
Electrode 14 is connect with the end of the shell 13, and is bent extension and central electrode 11 relatively, and fire is formed between central electrode 11
The gap of flower electric discharge.Electric arc is generated by the effect of pulse power between the central electrode 11 and grounding electrode 14, and then is generated
The mixed gas of spark ignition surrounding them, achievees the purpose that automatic ignition.
Since the working environment of spark plug is exceedingly odious, high temperature is high in the combustion chamber for the central electrode 11 and grounding electrode 14
The case where needing to light a fire many times under the conditions of pressure, and will appear deposit on the electrode and lead to its corrosion, lead to spark plug evil
Change.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
Corrosion resistance or increase number of electrodes to overcome the etching problem of electrode.But improve the corrosion resistance of electrode material
It needs to propose new electrode material, the etching problem of electrode can not be changed using existing electrode material；For same
When multiple electrodes are set, since multiple electrode equally exposes to the open air in a combustion chamber, it will suffer erosion simultaneously, can not be from basic
It is upper to solve the problems, such as the anticorrosive of electrode.
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 21, it is intracavitary which is in flame；The ground connection electricity close to electric discharge end is provided in the flame chamber 21
Pole 23.The discharge ignition apparatus that central electrode and grounding electrode are constituted is set in flame chamber 21, is first lighted in flame chamber 11
Air mixture, recycle flame chamber 21 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
Annular flow-guiding channel is formed between flow directing insert and the shell；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.
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 flow directing insert rear end is not attached to the shell；Or the flow directing insert rear end and the shell
Body port inner wall is affixed by least two connection units, hollow out between adjacent two connection unit；Or after the flow directing insert
End and the inner walls between be provided with a baffle, described baffle one end is connected with the inner walls port, the other end and
The flow directing insert rear end is connected, at least one through-hole is provided on the baffle.The enclosure interior is divided by flow directing insert
For the space of multiple connections, the circulation and fuel gas for facilitating combustion gas quickly reach firing end portion, improve igniting effect
Rate.
Alternatively, the flow directing insert rear end is also connected with a release portion.The setting in the release portion can further speed up combustion
Gas reaches the speed of firing end portion and spark is discharged to the speed of internal combustion engine cylinders.
Further, the release portion is funnel structure, and slot end connects with the rear end of the flow directing insert, the interface
The aperture gross area is greater than the gross area in gap between the grounding electrode and central electrode.
Further, the wide mouth end with the shell in the release portion are not attached to；Or wide mouth end and the institute in the release portion
Shell port inner wall is stated to connect by least two connection units；Or release portion rear end and shell port end face it
Between airtight connection, be provided with water conservancy diversion through-hole on the side wall in the release portion.
Alternatively, the release portion includes the Ka Jiao of at least two rear ends for being connected to the flow directing insert, the release portion
The outer wall of Ka Jiao be bonded with the inner walls, be arranged between the adjacent card angle fluted.To which groove connection is led
Circulation road and fire jetting hole guarantee combustion gas circulating in spark plug.
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 flow-guiding channel, 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 1.
Fig. 4 is the structural schematic diagram of flow directing insert shown in Fig. 3 and grounding electrode.
Fig. 5 is the structural schematic diagram of another deformation spark plug of embodiment 1.
Fig. 6 is the structural schematic diagram of second of deformation spark plug of embodiment 1.
Fig. 7 is the spark plug configuration schematic diagram of the embodiment of the present invention 2.
Fig. 8 is the structural schematic diagram of flow directing insert shown in Fig. 7 and grounding electrode.
Fig. 9 is the structural schematic diagram of another deformation spark plug of embodiment 2.
Figure 10 is the structural schematic diagram of second of deformation spark plug of embodiment 2.
Figure 11 is the spark plug configuration schematic diagram of the embodiment of the present invention 3.
Figure 12 is the structural schematic diagram of another deformation spark plug of embodiment 3.
Figure 13 is the structural schematic diagram of second of deformation spark plug of embodiment 3.
Figure 14 is the spark plug configuration schematic diagram of the embodiment of the present invention 4.
Figure 15 is the structural schematic diagram of flow directing insert and grounding electrode shown in Figure 14.
Specific embodiment
Embodiment 1
Referring to Fig. 3, it is the structural schematic diagram of the embodiment 1 of spark plug of the invention.The spark plug 300 includes insulation
Body 310, central electrode 320, shell 340, flow directing insert 360 and grounding electrode 380.The insulator 310 is ceramics insulator,
It has the axis hole extended in the axial direction.The central electrode 320 is inserted through the axis hole and bared end of the insulator 310
Portion 322.The shell 340 is hollow structure, and is set in the surface of the insulator 310.
It is that the flow directing insert 360 of spark plug 300 shown in Fig. 3 and the structure of grounding electrode 380 are shown please refer to Fig. 4
It is intended to.The flow directing insert 360 is hollow round table structure, and the fire jetting hole 362 through its front/rear end, institute are provided on axis
State the front end 362a of the fire jetting hole 362 of flow directing insert 360 aperture be greater than the fire jetting hole 362 rear end 362b aperture.Institute
The front end for stating flow directing insert 360 is located inside shell 340, and rear end is located at the open end of shell 340 or extension protrudes from shell 340
Open end；360 front end of flow directing insert is connect simultaneously by least two connecting rod (not shown) with 340 inner wall of shell
It is fixed in shell 340, hollow out between the adjacent connecting rod.The front end face central electrode of the flow directing insert 360
320 ends 322, the end 322 of the central electrode 320 be set to the fire jetting hole 362 of the flow directing insert 360 top or
It extends in the fire jetting hole 362 of the flow directing insert 360.It is formed between the outside and inner walls of the flow directing insert 360
One annular flow-guiding channel A.The flow-guiding channel A passes through gap between 360 front end of flow directing insert and shell 340 and flame
Hole 362 is connected to, to guarantee that combustion gas can circulate between annular flow-guiding channel A and fire jetting hole 362.
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.
As to further improvement of this embodiment, Fig. 5 and Fig. 6 are please referred to, rear end and shell in the flow directing insert 360
Baffle 368 is set between 340 inner wall of body, described 368 one end of baffle is connected to 340 port inner wall of shell, and with the shell
340 inner wall of body is vertical or forms certain angle, at least one through-hole 368a is arranged on the baffle.Or in the flow directing insert
At least two connection units, described connection unit one end and the shell 340 are set between 360 340 inner wall of rear end and shell
Port inner wall connection, the other end are connected to 360 outer wall of flow directing insert, and or formation one vertical with 340 inner wall of shell
Angle is determined, for connecting flow directing insert 360 and shell 340.
In the induction stroke of internal combustion engine, the mixed gas that fuel and air are formed is simultaneously filled with the cylinder body of combustion chamber, by
The pressure of plug ignition end, the fire jetting hole that mixed gas passes through the flow directing insert 360 are much larger than in the intracorporal pressure of cylinder
362 and flow-guiding channel A is advanced into rapidly spark plug and full of around firing end portion.
And in the pulse firing of spark plug, it is filled with around the firing end portion in the fire jetting hole 362 of the spark plug mixed
Gas is closed, the mixed gas around the ignitor that discharges between the central electrode 320 and the grounding electrode 380 is sprayed at this time
Gas in fire hole 362 is ignited and expands rapidly, and pressure increases rapidly in spark plug, and then spark is pushed to release to cylinder body direction
It puts.Further, since the annular flow-guiding channel A formed between flow directing insert 360 and shell 340 is stored greatly in induction stroke
Mixed gas is measured, and flow-guiding channel A is connected with fire jetting hole 362, in the firing end portion ignition point of spark plug 300, the water conservancy diversion
Moment is ignited a large amount of mixed gas simultaneously in the A of channel, can form the bigger air-flow expanded rapidly, push spark rapidly to
Internal combustion engine cylinders release.
In the spark release of pulse firing, the pressure of firing end portion is reduced rapidly, at this point, flow-guiding channel A is as reflux
Channel accelerates the reflux of mixed gas in cylinder body.In igniting, cylinder body fuel is largely gathered in rapidly firing end portion, and can be
Discharge spark when so that the gas spark lighted is reached cylinder body rapidly, realize gas in electrode chamber body and cylinder it is intracorporal plus
Speed reflux, to improve the efficiency of combustion of internal combustion engine.
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.Secondly, traditional
In technique, need to weld the multiple baffles of setting in shell to form diversion trench and fire jetting hole, complex process is not easy to realize.And this
The flow directing insert 360 and shell 340 of invention use and process the processing method fixed in fitting respectively, easy to accomplish.Further, should
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, so that
Flow velocity of the spark when passing through rear end 362b when fuel and flame when igniting increases, thus it is more efficient by spark guide to
In the cylinder body of internal combustion engine.
Embodiment 2
The spark plug of the present embodiment 2 is roughly the same with embodiment 1, and difference is only that the knot of the flow directing insert of spark plug
Structure and flow directing insert front end are different with the inner wall connection type of shell.Please refer to Fig. 7 and Fig. 8, wherein Fig. 7 is this hair
The structural schematic diagram of the embodiment 2 of bright spark plug, Fig. 8 are the structural schematic diagrams of the flow directing insert 460 of the present embodiment 2.It is described
Flow directing insert 460 is hollow round table structure, and the fire jetting hole 462 through its front/rear end is provided on axis, and the water conservancy diversion is inserted
The aperture of the front end 462a of the fire jetting hole 462 of part 460 is greater than the aperture of the rear end 462b of the fire jetting hole 462.The water conservancy diversion is inserted
The front end of part 460 is located inside shell 340, and rear end is located at the open end of shell 340 or extension protrudes from the opening of shell 340
End；320 end 322 of front end face central electrode of the flow directing insert 460, the end 322 of the central electrode 320 is set to
The top of the fire jetting hole 462 of the flow directing insert 460 extends in the fire jetting hole 462 of the flow directing insert 460.Described
An annular flow-guiding channel A is formed between the outside and inner walls of flow directing insert 460.In the present embodiment, the water conservancy diversion is inserted
At least one deflector hole 466 is provided on 460 side wall of part, the deflector hole 466 runs through the frustum cone structure side of flow directing insert 460
Wall communicates bocca 462 by the deflector hole 466 with flow-guiding channel A, guarantees circulating for combustion gas；The deflector hole
466 can be vertical with 460 rotary table side wall of flow directing insert, or has a certain degree with the 460 rotary table side wall shape of flow directing insert.
In the present embodiment, the flow directing insert 460 can be fixed in the shell 340 by two ways, one
Are as follows: referring to Fig. 7, the front end outer wall of the flow directing insert 460 and the inner walls airtight connection, flow-guiding channel A pass through institute
Deflector hole 466 is stated to communicate with fire jetting hole 462；Secondly are as follows: Fig. 9 and Figure 10 are please referred to, in 460 front end of flow directing insert by extremely
Flow directing insert 460 is fixed on 340 inner wall of shell, hollow out between the adjacent connecting rod, and the shell by few two connecting rods
Gap is formed between 340 inner wall of body and the flow directing insert 460, is further ensured that combustion gas can be in annular flow-guiding channel A and spray
It is circulated between fire hole 462.
As to further improvement of this embodiment, Fig. 9 and Figure 10 are please referred to, after being respectively the flow directing insert 460
End protrudes from the structural schematic diagram of spark plug corresponding to the open end of shell 340 positioned at the open end of shell 340 and extension,
Baffle 468, described 468 one end of baffle and the shell are set between 340 inner wall of rear end and shell of the flow directing insert 460
The connection of 340 port inner walls, the other end are connect with the flow directing insert rear end, and or formation one vertical with 340 inner wall of shell
Determine angle, and at least one through-hole 468a is set on the baffle, so that combustion gas is entered flow-guiding channel A by 468a, by leading
Discharge orifice 466 reaches firing end portion；Or it is arranged at least two between 340 inner wall of rear end and shell of the flow directing insert 460
Connection unit, described connection unit one end are connect with 340 port inner wall of shell, after the other end and the flow directing insert 460
End connection, and or formation certain angle vertical with 340 inner wall of shell, for connecting flow directing insert 460 and shell 340.
Deflector hole 466 is set on 460 side wall of flow directing insert, and in the induction stroke of internal combustion engine, fuel can pass through water conservancy diversion
Channel A, deflector hole 466 reach firing end portion, avoid part of fuel and remain in formation charcoal black stainss outside shell 340, improve combustion
The utilization rate of material.In addition, fuel can reach firing end portion by multiple channels, and fuel enter flow-guiding channel A after can be straight
The deflector hole 466 for connecting setting reaches firing end portion, improves the efficiency of internal combustion engine.In 340 port of shell, baffle is set
468, and on the baffle 468 be arranged through-hole 468a, air inlet or discharge spark aperture reduce so that igniting when fuel and
Flow velocity of the spark when passing through rear end 362b when flame increases, so that more efficient guide spark to cylinder body.
When the plug ignition, the gas being ignited directly passes through the fire jetting hole 462 and discharges to cylinder body direction.Into one
Step, the deflector hole 466 can also accelerate the reflux of mixed gas in cylinder body.After the spark release of pulse firing, firing tip
The pressure in portion is reduced rapidly, and the flow-guiding channel A and deflector hole 466 are used as return flow line at this time, accelerates mixed gas in cylinder body
Reflux, to improve the efficiency of combustion of internal combustion engine.
Embodiment 3
The spark plug of the present embodiment 3 is roughly the same with embodiment 1, and difference is only that the knot of the flow directing insert of spark plug
Structure is different.Figure 11 is please referred to, the rear end of the flow directing insert 560 is also connected with a release portion, and the release portion is funnel structure, institute
The slot end for stating the frustum cone structure of flow directing insert connects with the slot end of the funnel structure, the total face in aperture at the interface 569
Product is greater than the gross area in gap between the grounding electrode and central electrode.The wide port of the frustum cone structure and the middle electrocardio
Pole 320 is opposite.At least one deflector hole 566 is provided on the side wall of the hollow round table structure of the flow directing insert 560, it is described to lead
Discharge orifice 566 runs through the frustum cone structure side wall of flow directing insert 560, and bocca 562 and flow-guiding channel A is made to pass through the deflector hole 566
It communicates, guarantees circulating for combustion gas.The wide mouth end of the funnel structure in the release portion is located at the open end of shell 340.
In the present embodiment, the flow directing insert 560 can be fixed in the shell 340 by two ways, one
Are as follows: the inner wall airtight connection of the front end outer wall of the flow directing insert 560 and the shell 340, the flow-guiding channel A pass through described
Deflector hole 566 is communicated with fire jetting hole 562；Secondly being that will be led in the front end of the flow directing insert 560 by least two connecting rods
Stream plug-in unit 560 is fixed on 340 inner wall of shell, and hollow out between the adjacent connecting rod is further ensured that combustion gas can be led in annular
It is circulated between circulation road A and fire jetting hole 562.Total face in gap between the grounding electrode 380 and the central electrode 320
Product is less than the gross area of 560 frustum cone structure of flow directing insert and the formed aperture of funnel structure link position.Pass through ground connection electricity
The setting of 560 size of pole 380 and flow directing insert is able to guide the primary air after exploding to cylinder body direction quick release, simultaneously because
Internal and external pressure difference, fuel can be continuously replenished by flow directing insert 560 to be reached in firing end portion, forms the effect of spark sustained firing
Fruit overcomes the disadvantage of mixed gas circulation difference in the prior art.
As to further improvement of this embodiment, Figure 12 is please referred to, rear end and 340 inner wall of shell in the release portion
Between at least two connection units 567 are set, described 567 one end of connection unit is connect with 340 port inner wall of shell, and with
340 inner wall of shell is vertical or forms certain angle, Connection Release portion and shell 340, between the adjacent connection unit 567
Hollow out；Alternatively, Figure 13 is please referred to, airtight connection between 340 port end face of release portion rear end face and the shell, and
Water conservancy diversion through-hole 566a is set on the funnel structure side wall, and the fire jetting hole 562 and flow-guiding channel A can pass through deflector hole 566
And water conservancy diversion through-hole 566a is communicated, and is improved combustion gas and is circulated efficiency in spark plug space, further improves internal combustion
Machine efficiency of combustion.
As a kind of distressed structure of the present embodiment, the rear end in the release portion protrudes from the open end of shell 340, in point
In the fiery stage, combustion gas can enter firing end portion quickly through the port in the release portion for protruding from shell 340, and discharge in spark
Stage can accurately enter the cylinder body of internal combustion engine by the port in release portion.
In the present embodiment, the drainage speed of the combustion gas when hatch frame of fire jetting hole can further increase plug ignition
The jet velocity of degree and spark, can further improve the ignition effectiveness of spark plug.Further, 569 size of interface is less than whole
The aperture size at remaining position in a fire jetting hole 562 discharges the stage in induction stroke or spark, and fuel or spark pass through water conservancy diversion
Flow velocity when plug-in unit 560 and the interface in release portion increases, so that more efficient guide spark to the cylinder body of internal combustion engine.
Embodiment 4
The spark plug of the present embodiment 4 is roughly the same with embodiment 1, and difference is only that the knot of the flow directing insert of spark plug
Structure is different.Figure 14 and Figure 15 are please referred to, the rear end of the flow directing insert 660 is also connected with a release portion, and the release portion includes extremely
Few two are connected to the card angle 664 of the flow directing insert rear end, are arranged fluted 665 between the adjacent card angle 664.The circle
Be provided on the side wall of the frustum cone structure of the wide port of platform structure and the relatively described flow directing insert 660 of the central electrode 320 to
A few deflector hole 666, the deflector hole 666 run through the frustum cone structure side wall of flow directing insert 660, make bocca 662 and water conservancy diversion
Channel A is communicated by the deflector hole 666, guarantees circulating for combustion gas.The card angle side wall and the shell in the release portion
The fitting of 340 inner walls, the groove 665 communicate the flow-guiding channel A with the fire jetting hole 662.The flow directing insert 660 can be with
It is fixed in the shell 340 by two ways, one are as follows: the frustum cone structure front end of the flow directing insert 660 and the shell
The inner wall airtight connection of body 340, the flow-guiding channel A are communicated by the deflector hole 666 with fire jetting hole 662；Secondly being, in institute
Flow directing insert 560 is fixed on 340 inner wall of shell by least two connecting rods by the frustum cone structure front end for stating flow directing insert 660,
Hollow out between the adjacent connecting rod, be further ensured that combustion gas can between annular flow-guiding channel A and fire jetting hole 562 recycle stream
It is dynamic.The setting of card angle 664 and groove 665, makes flow directing insert 660 further be stably fixed on the shell in the release portion
Inside 340, and groove 665 communicates flow-guiding channel A with fire jetting hole 662, guarantees circulation of the combustion gas inside spark plug.
In addition, spark plug of the invention can also there are many variant embodiment, the specially described flow directing insert rear end connections
Release portion be not limited to funnel structure or Ka Jiao, can also be horn structure, remaining structure is constant.
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, the flow directing insert and the shell
Annular flow-guiding channel is formed between body, the end of the central electrode is set in the fire jetting hole of the flow directing insert；It is described to connect
Ground electrode setting forms the firing tip with spark-discharge gap in the fire jetting hole front end between the end of central electrode
Portion；The flow directing insert rear end is also connected with a release portion；The release portion is funnel structure, slot end and the flow directing insert
Rear end connect, the interface aperture gross area be greater than between the grounding electrode and central electrode gap the gross area；The release
Portion includes the Ka Jiao of at least two rear ends for being connected to the flow directing insert, the outer wall and the shell of the Ka Jiao in the release portion
Inner wall is bonded, and is arranged between adjacent card angle fluted.
2. spark plug according to claim 1, it is characterised in that: the flow directing insert rear end is not attached to the shell；
Or the flow directing insert rear end and the shell port inner wall are affixed by least two connection units, adjacent two connection unit
Between hollow out；Or a baffle is provided between the flow directing insert rear end and the inner walls, described baffle one end and institute
It states inner walls port to be connected, the other end is connected with the flow directing insert rear end, at least one through-hole is provided on the baffle.
3. 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；Or the wide mouth end in the release portion is connect with the shell port inner wall by least two connection units；Or it is described
Airtight connection between release portion rear end and shell port end face is provided with water conservancy diversion through-hole on the side wall in the release portion.
4. spark plug described in any claim in -3 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.
5. spark plug according to claim 4, 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 the adjacent connecting rod.
6. spark plug according to claim 5, it is characterised in that: be provided at least one on the side wall of the flow directing insert
Deflector hole.
7. spark plug according to claim 4, it is characterised in that: the front end of the flow directing insert and the inner walls are close
Close connection；At least one deflector hole is provided on the side wall of the flow directing insert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604898.8A CN106549306B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604898.8A CN106549306B (en) | 2015-09-21 | 2015-09-21 | A kind of spark plug |
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| CN106549306B true CN106549306B (en) | 2019-03-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344014A (en) * | 1977-04-07 | 1982-08-10 | Nippon Soken, Inc. | Ignition spark 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 |
| CN204205282U (en) * | 2014-10-31 | 2015-03-11 | 张蝶儿 | A kind of spark plug |
| CN205070158U (en) * | 2015-09-21 | 2016-03-02 | 何东铖 | Spark plug |
-
2015
- 2015-09-21 CN CN201510604898.8A patent/CN106549306B/en active Active
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 |
| 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 |
| CN204205282U (en) * | 2014-10-31 | 2015-03-11 | 张蝶儿 | A kind of spark plug |
| CN205070158U (en) * | 2015-09-21 | 2016-03-02 | 何东铖 | Spark plug |
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