CN103956654A - Sparking plug - Google Patents
Sparking plug Download PDFInfo
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- CN103956654A CN103956654A CN201410196892.7A CN201410196892A CN103956654A CN 103956654 A CN103956654 A CN 103956654A CN 201410196892 A CN201410196892 A CN 201410196892A CN 103956654 A CN103956654 A CN 103956654A
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Abstract
A sparking plug comprises an insulating body, a central electrode, a shell, a partition plug-in unit and a grounding electrode. The insulating body is provided with an axle hole extending in the axis direction. The central electrode is inserted into the axle hole penetrating through the insulating body and the end of the central electrode is exposed outside. The shell is in the shape of a hollow column, and the shell is arranged on the surface of the insulating body in a sleeved mode. A blast space is formed between the insulating body and the shell. The partition plug-in unit is arranged in the blast space in a plugged mode and fixed between the inner wall of the shell and the insulating body, and the partition plug-in unit divides the blast space into an ignition space body and a combustion supporting space body. The end of the central electrode is located in the ignition space body. The grounding electrode is arranged on the inner wall, where the partition plug-in unit is located, of the ignition space body, and an ignition end provided with a spark discharging gap is formed between the grounding electrode and the end of the central electrode. The sparking plug has the advantages that the situations that sediment appears and the sparking plug is corroded accordingly are avoided, and the service life of the sparking plug is prolonged. The partition plug-in unit structure can increase the ignition efficiency and the backflow efficiency of the sparking plug, and therefore the combustion efficiency of an internal combustion engine is increased.
Description
Technical field
The igniting field that the present invention relates to a kind of internal combustion engine, especially relates to a kind of spark plug.
Background technology
Internal combustion engine is after liquid or gaseous fuel are mixed with air, and the high compression combustion chamber burning outburst of directly inputting cylinder internal produces power.Heat energy to be converted into a kind of heat engine of mechanical energy.Spark plug is to be installed on internal combustion engine, for the sparking of the mist in combustion chamber.Refer to Fig. 1, it is the structural representation of prior art spark plug 13.This spark plug 13 comprises a central electrode 132, insulator 134, housing 136 and grounding electrode 138.This insulator 134 is ceramics insulator, has the axis hole extending along axis direction, and this central electrode 132 inserts the axis hole that runs through this insulator 134.This housing 136 is arranged on the periphery of this insulator 134, and the surface of housing 136 has screw thread.This grounding electrode 138 is connected with the end of this housing 136, and crooked extension is relative with central electrode 132, and between central electrode 132, forms the gap of sparkover.Between this central electrode 132 and grounding electrode 138, form igniting end, this igniting end produces electric arc by the effect of pulse electric power, and then produces electric spark and light the mist around electrode, reaches the object of automatic ignition.Because the operational environment of spark plug is exceedingly odious, this central electrode 132 and grounding electrode 138 need igniting many times in combustion chamber under high-temperature and high-pressure conditions, and on this electrode, there will be deposit and cause its corrosion, cause being worse off of spark plug.
In order to slow down the speed of worsening of spark plug, technical staff has carried out various improvement to spark plug.As by improving the corrosion resistance of electrode material or increasing the etching problem that number of electrodes overcomes electrode.But the corrosion resistance that improves electrode material need to propose new electrode material, in the situation that adopting existing electrode material, cannot change the etching problem of electrode; For a plurality of electrodes are set simultaneously, because the plurality of electrode exposes to the open air equally in combustion chamber, will suffer erosion simultaneously, can not fundamentally solve the anticorrosive problem of electrode.
Or central electrode and grounding electrode are arranged in the cavity of housing.Refer to Fig. 2, it is the structural representation of another spark plug in prior art.This spark plug comprises shell and is fixedly installed in the insulated ceramic core in shell; Central electrode 7 is housed in this insulated ceramic core; The upper end of this central electrode is stretched out insulated ceramic core and is formed an electric discharge end 17; This shell has a flame chamber 11, and this electric discharge end 17 is in flame chamber; In this flame chamber 11, be provided with the grounding electrode 13 that approaches electric discharge end.The discharge ignition apparatus of central electrode and grounding electrode formation is arranged in flame chamber 11, first light the air mixture in flame chamber 11, the mist of the flame ignition combustion chambers of internal combustion engines of recycling flame chamber 11 ejections, create a some fire environment efficiently, and reduced sedimental deposition velocity on electrode.But, for central electrode and grounding electrode are arranged in the cavity of housing, the distance that the spark that can make two electrodes produce enters combustion chamber increases, and then make the burning time of the mist of combustion chamber produce delay, because the compression stroke of internal combustion engine operation and the time of expansion stroke are the set time, shorten the burning time of mist, reduced to a certain extent the combustion efficiency of internal combustion engine, be unfavorable for energy-conserving and environment-protective.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art, with not enough, provides the spark plug that a kind of combustion efficiency is high.
The present invention is achieved by the following technical solutions: a kind of spark plug, it comprises insulator, central electrode, housing, separation plug-in unit and grounding electrode.It has the axis hole extending along axis direction this insulator; This central electrode inserts and runs through the axis hole of this insulator and expose end; This housing is hollow columnar, and this housing is set in this insulator surface; Between this insulator and housing, form one and fire space, the end of this central electrode is positioned at this and fires space; This its be plugged in this and fire in space and be fixed between the inwall and insulator of housing, this is fired to spatial separation and becomes ignition space and combustion-supporting space, this combustion-supporting spatial loop is communicated with this ignition space around this ignition space and by through hole; The end of this central electrode is positioned at ignition space; This grounding electrode is arranged on separation plug-in unit and is positioned on the inwall of ignition space, and between the end of central electrode, forms the igniting end in the gap with sparkover.
Further, this separation plug-in unit is infundibulate, and its bottom is slot end, sheathed and prop up the outer wall of this insulator, and its top is wide mouth end, props up the inwall of this housing, and this separation plug-in unit is provided with the first different through hole of aperture and the second through hole.
Or this separation plug-in unit comprises separating part and fixed part; This cutting part is funnel-form, is set on this insulator, and its bottom is slot end, sheathed and prop up the outer wall of this insulator, and its top is wide mouth end, does not contact with the inwall of this housing; One end of this fixed part is fixedly connected with the outer wall of this separating part, and the inwall of its other end and this housing is fixed; This separating part is provided with the first through hole, and this fixed part is provided with between the second through hole or adjacent fixed part and forms the second through hole.
Or this separation plug-in unit is hollow columnar, it is around this insulator, its bottom is provided with screw thread, and top is provided with annular grounding electrode, and the bottom inwall of this housing is provided with a circle connecting edge, connecting edge be provided with screw thread, the bottom of this separation plug-in unit and connecting edge spin fixing; This separation plug-in unit is provided with the first through hole.
Or this separation plug-in unit comprises separating part and fixed part; This separating part is hollow columnar, and it is around this insulator, and its bottom props up the bottom surface of this housing and insulator junction; One end of this fixed part is fixedly connected with the outer wall of this separating part, and the inwall of its other end and this housing is fixed; This separating part is provided with the first through hole, and this fixed part is provided with between the second through hole or adjacent fixed part and forms the second through hole.
Further, the bottom of the separating part of this separation plug-in unit or separation plug-in unit is zigzag, and this zigzag recess forms the first through hole that is communicated with ignition space and combustion-supporting space.
Further, the inwall of this housing is provided with protruding pad, the outward flange of the fixed part of this separation plug-in unit is set up on this protruding pad, by punching press, its end is bent inwards the openend of this housing and props up this fixed part, thus the inner fold that makes the outward flange of this fixed part be sandwiched in protruding pad and housing port divide between to be fixed.
Further, this fixed part is circular, and it is set on this cutting part and with it and fixes, and the outward flange of this fixed part is zigzag, and this jagged recess forms the second through hole; Or this fixed part is circular, it is set on this cutting part and with it and fixes, and the openend outward flange of this housing is zigzag, and this jagged recess forms the second through hole.
Further, the aperture of this second through hole is greater than the aperture of this first through hole.
Further, this separation plug-in unit also comprises the fiery portion that leads, and this leads fiery portion is ducted body, and its one end is connected with the wide mouth end of this cutting part, and its other end extends to outside housing through the openend of housing.
With respect to prior art, the central electrode of spark plug of the present invention is arranged in housing, has avoided the situation that occurs deposit and cause its corrosion, has improved its useful life.Secondly, this separation plug-in unit ignition space is divided into different functional spaces, can further improve ignition effectiveness and the power of spark plug, thereby improve the combustion efficiency of internal combustion engine.Further, separation dongle configuration of the present invention is simple, and the housing of itself and spark plug adopts after processing respectively the fixing processing method of fit again, easily realize, and can be applicable to the spark plug of different size, reduce the cost of overlapping development, can improve the production efficiency of spark plug.
Below in conjunction with Figure of description, spark plug of the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of spark plug of the prior art.
Fig. 2 is the structural representation of another kind of spark plug in prior art.
Fig. 3 is embodiment 1 structural representation of spark plug of the present invention.
Fig. 4 is the perspective view of the separation plug-in unit shown in Fig. 3.
Fig. 5 is the structural representation of the embodiment 2 of spark plug of the present invention.
Fig. 6 is the structural representation of the separation plug-in unit of embodiments of the invention 2.
Fig. 7 is the structural representation of variant embodiment of the separation plug-in unit of embodiments of the invention 2.
Fig. 8 is the structural representation of variant embodiment of the separation plug-in unit of embodiments of the invention 2.
Fig. 9 is the structural representation of variant embodiment of the separation plug-in unit of embodiments of the invention 2.
Figure 10 is the structural representation of the separation plug-in unit of embodiments of the invention 3.
Figure 11 is the structural representation of the separation plug-in unit of embodiments of the invention 4.
Figure 12 is the structural representation of the separation plug-in unit of the embodiment of the present invention 5.
Figure 13 a, 13b, 13c are three kinds of view of the separation plug-in unit of the embodiment of the present invention 5 and the relative position of housing.
Embodiment
embodiment 1
Please refer to Fig. 3, it is embodiment 1 structural representation of spark plug of the present invention.This spark plug 20 comprises central electrode 21, insulator 24, housing 26 and separates plug-in unit 28.This insulator 24 is ceramics insulator, and it has the axis hole extending along axis direction.This central electrode 21 inserts and runs through the axis hole of this insulator 24 and expose end 211.This housing 26 is hollow structure, is set in the surface of this insulator 24, and between this housing 26 and insulator 24, form an annular fire space A, the end 211 of this central electrode is positioned at this ignition space A.This separation plug-in unit 28 is plugged in this and fires in space, and is fixed between the inwall and insulator of housing, this is fired to space A and be separated into ignition space C and combustion-supporting space D; Wherein, this ignition space C is for separating the space between plug-in unit inwall and insulator 24, and this combustion-supporting space D is for separating the space between plug-in unit outer wall and inner walls, and this combustion-supporting spatial loop is communicated with this ignition space around this ignition space and by through hole.Grounding electrode is arranged on separation plug-in unit and is positioned on the inwall of ignition space, and forms the igniting end with spark-discharge gap between the end 211 of central electrode.The outer surface of this central electrode 21 and grounding electrode can weld noble metal, as iraurite, to improve the performance of its igniting.
Please refer to Fig. 4, it is the perspective view of separating plug-in unit shown in Fig. 3.This separates plug-in unit 28 is hollow funnel-form, its bottom 28a is slot end, its top 28b is wide mouth end, it is set on this insulator 24, slot end is sheathed and prop up the outer wall of this insulator 24, wide mouth end props up the inwall of this housing, thereby this is fired to space A, is separated into ignition space B and combustion-supporting space C.This separation plug-in unit is provided with the first through hole 282 and the second through hole 283, to be communicated with igniting space B and combustion-supporting space C.Wherein, the aperture of this first through hole 282 and the second through hole 283 must vary in size, to realize convection current and the circulation between relatively airtight ignition space and combustion-supporting space.This is that the active force producing in same space is the same owing to being pushed into by combustion chamber in the ignition space of spark plug when mist; When if the aperture of this first through hole and the second through hole when consistent, when the gas of ignition space will enter combustion-supporting space by these two kinds of through holes by active force, combustion-supporting space also can produce reaction force and stop gas to enter, when the gas pressure in two spaces reaches identical, gas just cannot flow in ignition space and combustion-supporting space.Because gas is the mixture by fuel and air, if two spaces can not continue circulative convection, can reduce the efficiency of burning again.Therefore, must make the aperture of the first through hole 282 and the second through hole 283 different.The wide mouth end of this separation plug-in unit is fixed by welding in this inner walls.
When the induction stroke of internal combustion engine, the mist that fuel and air form is full of the cylinder body of combustion chamber simultaneously, due to the pressure of the pressure in cylinder body much larger than plug ignition end, mist is advanced into rapidly the ignition space B of spark plug, and enters combustion-supporting space C by separating the through hole 282 of plug-in unit 28.
And when the pulse firing of spark plug, the ignitor that discharges between central electrode 21 in ignition space B and grounding electrode mist around, now the gas in ignition space B is ignited and is expanded rapidly, and pressure increases rapidly, and then promotion spark discharges to cylinder body direction.Simultaneously, the mist that the spark of this ignition space B is ignited and stored in combustion-supporting space C by the first through hole 282 and the second through hole 283, mist in combustion-supporting space C fires rear rapid expansion, its spark is supplemented to ignition space by the first through hole 282 or the second through hole 283 simultaneously, makes spark plug can provide more constantly power at firing stroke.When during firing stroke, ignition space is when pressure in combustion-supporting space reaches consistent, because the aperture of the first through hole and the second through hole is inconsistent, uniform pressure acts on two kinds of through holes that aperture cross section is different, can produce pressure difference, mist is realized gas under the effect of pressure difference can continue circulative convection in these two spaces, to guarantee the continuation running of spark plug.
With respect to prior art, the central electrode 21 of spark plug of the present invention is arranged in housing, has avoided the situation that occurs deposit and cause its corrosion, has improved its useful life.Secondly, separation dongle configuration of the present invention is simple, its with the housing of spark plug adopt process respectively after the fixing processing method of fit again, easily realize, and can be applicable to the spark plug of different size, reduce the cost of overlapping development, can improve the production efficiency of spark plug.Further, this separation plug-in unit ignition space is divided into different functional spaces, can further improve ignition effectiveness and the power of spark plug, thereby improve the combustion efficiency of internal combustion engine.
embodiment 2
The spark plug of the present embodiment 2 and embodiment's 1 is roughly the same, and its structure of distinguishing the separation plug-in unit that is only spark plug is different.Please refer to Fig. 5 and Fig. 6, wherein, Fig. 5 is the structural representation of the embodiment 2 of spark plug of the present invention.Fig. 6 is the structural representation of the separation plug-in unit 38 of the present embodiment 2.This separation plug-in unit 38 comprises separating part 382 and fixed part 384.Wherein, this separating part 382 is funnel-form, is set on this insulator, its bottom 38a is slot end, its top 38b is wide mouth end, the hole 383 of the outer wall of sheathed this insulator 24 of its slot end formation one annular with interval, and wide mouth end does not contact with the inwall of this housing.This fixed part 384 is circular, and it is set on this cutting part 382 and fixes with it, and the outward flange of this fixed part 384 and the inwall of this housing are fixed.Thereby this separation plug-in unit fires space A by this and is separated into ignition space B and combustion-supporting space C, this hole 383 is communicated with igniting space B and combustion-supporting space C.
In the present embodiment, on the inwall of this housing, be provided with protruding pad 362, the outward flange of this fixed part 384 is set up on this protruding pad 362, then by punching press, its end is bent inwards the openend of this housing and prop up this fixed part 384, thereby the outward flange that makes this fixed part be sandwiched in the inner fold of protruding pad and housing port divide between to be fixed, make the opening of housing form cambered surface slot end simultaneously.This fixed part 384 is provided with the second through hole 385, and the aperture of this second through hole 385 is greater than the spacing of this hole 383.
When the induction stroke of internal combustion engine, the mist that fuel and air form is full of the cylinder body of combustion chamber simultaneously, due to the pressure of the pressure in cylinder body much larger than plug ignition end, mist is advanced into rapidly the ignition space B of spark plug, by the second through hole 385, enter combustion-supporting space C, a small amount of mist enters combustion-supporting space C by the hole 383 of separating part 382 simultaneously.Because the spatial volume of this ignition space B, combustion-supporting space C and combustion chamber is different, mist can pass through separating part top end opening, the second through hole and hole Rapid Circulation in several spaces and flow, oil molecule and the air molecule of mist the inside are mixed at short notice more fully, and well-mixed gaseous fuel can effectively improve the combustion rate of fuel.
And when the pulse firing of spark plug, the ignitor that discharges between central electrode in ignition space B and grounding electrode mist around, now the gas in ignition space B is ignited and is expanded rapidly, and pressure increases rapidly, and then promotion spark discharges to cylinder body direction.Simultaneously, the mist that the spark of this ignition space B is ignited and stored in combustion-supporting space C by through hole hole 383, mist in combustion-supporting space C fires rear rapid expansion, because the aperture of the second through hole 385 is greater than the aperture of hole 383, the spark in combustion-supporting space C discharges to cylinder body direction by the second larger through hole 385 of aperture rapidly.At an of short duration firing stroke, in the time, the high energy air-flow that the interior two bursts of different spaces of ignition space B and combustion-supporting space C fire generation discharges to combustion chamber jointly, more promptly the indoor fuel of ignition combustion.In fixing stroke, the time of full combustion of fuel is more abundant, and the heat energy of release is more, thereby has improved the combustion efficiency of internal combustion engine, reaches the effect of energy-saving and emission-reduction.
As the variant embodiment of the present embodiment, this fixed part can be set to a plurality of braces that are fixedly connected with the outer wall of separating part, and the effect of the second through hole can be realized in the gap between adjacent two braces; Or as shown in Figure 7, the outward flange of this circular fixed part is zigzag, when the openend of this housing bends inwards its end to prop up this fixed part by punching press, the interior turn of bilge of this housing and the jagged outer edge of fixed part form a plurality of the second through holes.In addition, as shown in Figure 8, the bottom of this separating part props up the outer wall of this insulator, and this separating part is provided with the first through hole 383 ', and this fixed part can be connected with the port edge of the wide mouth end of this separating part.Also can be as shown in Figure 9, one end of this fixed part extends to this and fires in space B.
This fixed part and separating part can be by one-body molded or welding to realize the fixing of the two; Also can be by socket be set on separating part, on this separating part, arrange and insert protrudingly, by inserting, protrudingly with coordinating of socket, the two is fixed.
embodiment 3
The spark plug of the present embodiment 3 and embodiment's 2 is roughly the same, and its structure of distinguishing the separation plug-in unit that is only spark plug is different.Refer to Figure 10, it is the structural representation of the separation plug-in unit 48 of the present embodiment 3.This separation plug-in unit comprises separating part 482, fixed part 484 and leads fiery portion 486.This separating part 482 is funnel-form, is set on this insulator, and its bottom is slot end, and its top is wide mouth end, and its slot end is sheathed and prop up the outer wall of this insulator 24, and wide mouth end does not contact with the inwall of this housing.This fixed part 484 is circular, and it is set on this cutting part 382 and with its outer wall and fixes, and the outward flange of this fixed part 384 and the inwall of this housing are fixed.Thereby this separation plug-in unit fires space A by this and is separated into ignition space B and combustion-supporting space C.This leads fiery portion 486 is hollow cylinder or stage body, and in the present embodiment, this leads the deformability of fiery portion is horn-like, and its slot end is connected with the top of this cutting part 482, and its other end extends to outside housing through the openend of housing.This cutting part 482 is provided with the first through hole 483, and this fixed part 484 is provided with the second through hole 485, and the aperture of this second through hole 485 is greater than the aperture of this first through hole 483.The aperture on the top of this cutting part 482 is greater than the aperture of this second through hole 485.
Owing to being communicated with ignition space, combustion-supporting space is different with the pore size in each space, combustion chamber, and air-flow can the preferential direction large along aperture flow, therefore, during induction stroke in air inlet at internal combustion engine, the mist that fuel and air form is full of the cylinder body of combustion chamber simultaneously, due to the pressure of the pressure in cylinder body much larger than plug ignition end, mist is advanced into rapidly the ignition space B of spark plug, by the second through hole 485, enter combustion-supporting space C, a small amount of mist enters combustion-supporting space C by the first through hole 483 of separating part 482 simultaneously.Because the spatial volume of this ignition space B, combustion-supporting space C and combustion chamber is different, mist can pass through separating part top end opening, the second through hole and hole Rapid Circulation in several spaces and flow, oil molecule and the air molecule of mist the inside are mixed at short notice more fully, and well-mixed gaseous fuel can effectively improve the combustion rate of fuel.
And when the pulse firing of spark plug, the ignitor that discharges between central electrode in ignition space B and grounding electrode mist around, now the gas in ignition space B is ignited and is expanded rapidly, and pressure increases rapidly, and then promotion spark discharges to cylinder body direction.Simultaneously, the mist that the spark of this ignition space B is ignited and stored in combustion-supporting space C by through hole the first through hole 483, mist in combustion-supporting space C fires rear rapid expansion, because the aperture of the second through hole 485 is greater than the aperture of the first through hole 483, the spark in combustion-supporting space C discharges to cylinder body direction by the second larger through hole 485 of aperture rapidly.At an of short duration firing stroke, in the time, the high energy air-flow that the interior two bursts of different spaces of ignition space B and combustion-supporting space C fire generation discharges to combustion chamber jointly, more promptly the indoor fuel of ignition combustion.In fixing stroke, the time of full combustion of fuel is more abundant, and the heat energy of release is more, thereby has improved the combustion efficiency of internal combustion engine, reaches the effect of energy-saving and emission-reduction.
In addition, this leads fiery portion 486 can play the effect that spark is burst out and guided, and the spark in pilot ignition space is more concentrated to be discharged to combustion chamber rapidly.
embodiment 4
The spark plug of the present embodiment 4 and embodiment's 1 is roughly the same, and its structure of distinguishing the separation plug-in unit that is only spark plug is different.Refer to Figure 11, it is the structural representation of the separation plug-in unit 58 of the present embodiment 4.This separates plug-in unit 58 is hollow columnar, and bottom 58a outer wall is provided with screw thread, and its top 58b is provided with annular grounding electrode 52.The bottom of this housing is provided with a circle connecting edge 262, the inwall of connecting edge is provided with screw thread, bottom 58a and the connecting edge of this separation plug-in unit 58 are spun, thereby be arranged on firing in the A of space of housing and insulator by separating plug-in unit 58, and this is fired to space A be separated into ignition space C and combustion-supporting space D.Wherein, this ignition space C is for separating the space between plug-in unit inwall and insulator, and this combustion-supporting space D is for separating the space between plug-in unit outer wall and inner walls, and this combustion-supporting spatial loop is around this ignition space C.The end 211 of this central electrode is positioned at the annular grounding electrode 52 center, top of this separation plug-in unit 58.The sidewall of this separation plug-in unit 58 is provided with the first through hole 583, to be communicated with this ignition space C and combustion-supporting space D.Wherein, the aperture of this first through hole 583 is less than the outer wall of this separation plug-in unit 58 and the distance of inner walls, and the outer wall of this separation plug-in unit 58 and the distance of inner walls are less than the aperture of ring in this grounding electrode.
Its action principle as above, when the pulse firing of spark plug, the ignitor that discharges between central electrode in ignition space B and grounding electrode mist around, now the gas in ignition space B is ignited and is expanded rapidly, pressure increases rapidly, and then promotes the centre bore of spark by grounding electrode and discharge to cylinder body direction.Simultaneously, the mist that the spark of this ignition space B is ignited and stored in combustion-supporting space C by through hole the first through hole 583, mist in combustion-supporting space C fires rear rapid expansion, owing to separating the outer wall of plug-in unit 58 and the distance of inner walls and be greater than the aperture of the first through hole 583, the spark in combustion-supporting space C is directly to the cylinder body release of bursting out.At an of short duration firing stroke, in the time, the high energy air-flow that the interior two bursts of different spaces of ignition space B and combustion-supporting space C fire generation discharges to combustion chamber jointly, more promptly the indoor fuel of ignition combustion.In fixing stroke, the time of full combustion of fuel is more abundant, and the heat energy of release is more, thereby has improved the combustion efficiency of internal combustion engine, reaches the effect of energy-saving and emission-reduction.
embodiment 5
The spark plug of the present embodiment 5 and embodiment's 4 is roughly the same, and its structure of distinguishing the separation plug-in unit that is only spark plug is different.Refer to Figure 12, it is the structural representation of the separation plug-in unit 68 of the present embodiment 5.This separation plug-in unit 68 comprises separating part 682 and fixed part 684.This separating part 682 is hollow columnar, and bottom 68a is zigzag, and the inwall of its top 68b is provided with annular grounding electrode 62.This fixed part 684 is circular, and it is set on this cutting part 682 and fixes with it.The outward flange of this fixed part 684 is zigzag.
On the inwall of this housing 66, be provided with protruding pad 662.The separating part 682 of this separation plug-in unit 68 is enclosed within the periphery of this insulator, bottom 68a props up the bottom surface of this housing and insulator junction, the outward flange of this fixed part 684 is set up on this protruding pad 662, then by punching press, its end is bent inwards the openend of this housing and prop up this fixed part 684, thereby the outward flange that makes this fixed part be sandwiched in the inner fold of protruding pad and housing port divide between to be fixed, make the opening of housing form cambered surface slot end simultaneously.The zigzag recess of the bottom 68a of this separating part 682 forms the first through hole 683 that is communicated with igniting space B and combustion-supporting space C, the outer peripheral zigzag recess of this fixed part 684 forms the second through hole 685, and the aperture of this second through hole 685 is greater than the aperture of this first through hole 683.
This separating part bottom and the zigzag design of fixed part outward flange are easy to processing, need not on separating part and fixed part, form through hole more in addition, and convenient processing, improves the efficiency of work.
In addition, variant embodiment as the present embodiment, the outward flange of this fixed part is level and smooth circular arc, and the edge of the openend of this housing is set to zigzag, while equally the openend of this housing bending inwards its end to prop up this fixed part by punching press, the zigzag recess of the interior turn of bilge of this housing forms a plurality of the second through holes.
Further, as shown in Figure 13 a, 13b and 13c, for the spark plug of different model, this separation plug-in unit can be arranged on housing in, maintain an equal level with the port of housing or protrude from the port of housing.
The above-mentioned structure of cutting apart plug-in unit of the present invention is not limited to above-described embodiment, and the architectural feature in each embodiment can rationally be intersected and be combined with, to be suitable for the spark plug of different model.The present invention is not limited to above-mentioned execution mode, if the various changes of invention or distortion are not departed to the spirit and scope of the present invention, within if these changes and distortion belong to claim of the present invention and equivalent technologies scope, the present invention is also intended to comprise these changes and distortion.
Claims (10)
1. a spark plug, is characterized in that, comprises
---insulator, it has the axis hole extending along axis direction;
---central electrode, its insertion runs through the axis hole of this insulator and exposes end;
---housing, it is hollow columnar, this housing is set in this insulator surface; Between this insulator and housing, form one and fire space, the end of this central electrode is positioned at this and fires space;
---separate plug-in unit, it is plugged in this and fires in space and be fixed between the inwall and insulator of housing, this is fired to spatial separation and become ignition space and combustion-supporting space, and this combustion-supporting spatial loop is communicated with this ignition space around this ignition space and by through hole; The end of this central electrode is positioned at ignition space;
---grounding electrode, it is arranged on separation plug-in unit and is positioned on the inwall of ignition space, and between the end of central electrode, forms the igniting end in the gap with sparkover.
2. spark plug according to claim 1, is characterized in that: this separation plug-in unit is infundibulate, and its bottom is slot end, sheathed and prop up the outer wall of this insulator, its top is wide mouth end, props up the inwall of this housing, and this separation plug-in unit is provided with the first different through hole of aperture and the second through hole.
3. spark plug according to claim 1, is characterized in that: this separation plug-in unit comprises separating part and fixed part; This cutting part is funnel-form, is set on this insulator, and its bottom is slot end, sheathed and prop up the outer wall of this insulator, and its top is wide mouth end, does not contact with the inwall of this housing; One end of this fixed part is fixedly connected with the outer wall of this separating part, and the inwall of its other end and this housing is fixed; This separating part is provided with the first through hole, and this fixed part is provided with between the second through hole or adjacent fixed part and forms the second through hole.
4. spark plug according to claim 1, it is characterized in that: this separation plug-in unit is hollow columnar, it is around this insulator, its bottom is provided with screw thread, top is provided with annular grounding electrode, the bottom inwall of this housing is provided with a circle connecting edge, connecting edge be provided with screw thread, the bottom of this separation plug-in unit and connecting edge spin fixing; This separation plug-in unit is provided with the first through hole.
5. spark plug according to claim 1, is characterized in that: this separation plug-in unit comprises separating part and fixed part; This separating part is hollow columnar, and it is around this insulator, and its bottom props up the bottom surface of this housing and insulator junction; One end of this fixed part is fixedly connected with the outer wall of this separating part, and the inwall of its other end and this housing is fixed; This separating part is provided with the first through hole, and this fixed part is provided with between the second through hole or adjacent fixed part and forms the second through hole.
6. according to the spark plug described in claim 2,3 or 5, it is characterized in that: the bottom of the separating part of this separation plug-in unit or separation plug-in unit is zigzag, and this zigzag recess forms the first through hole that is communicated with ignition space and combustion-supporting space.
7. according to the spark plug described in claim 3 or 5, it is characterized in that: the inwall of this housing is provided with protruding pad, the outward flange of the fixed part of this separation plug-in unit is set up on this protruding pad, by punching press, its end is bent inwards the openend of this housing and props up this fixed part, thus the inner fold that makes the outward flange of this fixed part be sandwiched in protruding pad and housing port divide between to be fixed.
8. spark plug according to claim 7, is characterized in that: this fixed part is circular, and it is set on this cutting part and with it and fixes, and the outward flange of this fixed part is zigzag, and this jagged recess forms the second through hole; Or this fixed part is circular, it is set on this cutting part and with it and fixes, and the openend outward flange of this housing is zigzag, and this jagged recess forms the second through hole.
9. spark plug according to claim 3, is characterized in that: this separation plug-in unit also comprises the fiery portion that leads, and this leads fiery portion is ducted body, and its one end is connected with the wide mouth end of this cutting part, and its other end extends to outside housing through the openend of housing.
10. spark plug according to claim 8, is characterized in that: the aperture of this second through hole is greater than the aperture of this first through hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410196892.7A CN103956654B (en) | 2014-05-09 | 2014-05-09 | A kind of spark plug |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410196892.7A CN103956654B (en) | 2014-05-09 | 2014-05-09 | A kind of spark plug |
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| CN103956654A true CN103956654A (en) | 2014-07-30 |
| CN103956654B CN103956654B (en) | 2016-08-17 |
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| CN201410196892.7A Expired - Fee Related CN103956654B (en) | 2014-05-09 | 2014-05-09 | A kind of spark plug |
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| CN105529616A (en) * | 2014-09-30 | 2016-04-27 | 张蝶儿 | Sparking plug |
| CN106549306A (en) * | 2015-09-21 | 2017-03-29 | 何东铖 | A kind of spark plug |
| CN106549303A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549307A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549305A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549304A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
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| CN105529616A (en) * | 2014-09-30 | 2016-04-27 | 张蝶儿 | Sparking plug |
| CN105529616B (en) * | 2014-09-30 | 2017-07-25 | 张蝶儿 | A kind of spark plug |
| CN106549306A (en) * | 2015-09-21 | 2017-03-29 | 何东铖 | A kind of spark plug |
| CN106549303A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549307A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549305A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549304A (en) * | 2015-09-21 | 2017-03-29 | 张蝶儿 | A kind of spark plug |
| CN106549305B (en) * | 2015-09-21 | 2019-02-05 | 张蝶儿 | A kind of spark plug |
| CN106549304B (en) * | 2015-09-21 | 2019-02-05 | 张蝶儿 | A kind of spark plug |
| CN106549307B (en) * | 2015-09-21 | 2019-02-05 | 张蝶儿 | A kind of spark plug |
| CN106549306B (en) * | 2015-09-21 | 2019-03-26 | 何东铖 | A kind of spark plug |
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| Publication number | Publication date |
|---|---|
| CN103956654B (en) | 2016-08-17 |
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