CN105207061A

CN105207061A - Multi-pole protruding spark plug with epitaxial center electrode

Info

Publication number: CN105207061A
Application number: CN201410285903.9A
Authority: CN
Inventors: 韦坤明; 原春玲
Original assignee: Foshan Huazhuang Innovation Technology Co Ltd
Current assignee: Foshan Huazhuang Innovation Technology Co Ltd
Priority date: 2014-06-23
Filing date: 2014-06-23
Publication date: 2015-12-30

Abstract

A multi-pole protruding spark plug with an epitaxial center electrode of the invention comprises a connection screw, a hollow insulator, a metal shell, a center electrode, an electrode slice, a protruding shell, end face high temperature-resistant alloy solder joints, a center electrode, and an electrode slice. The spark plug is characterized in that the threaded top end of the metal shell protrudes from the shell by at least 1mm, the top end and electrode points correspond to the end face welding high temperature-resistant alloy solder joints, the electrode slice is welded to the end face of the center electrode, the electrode points are extended to the high temperature-resistant alloy solder joints of the protruding shell, and the electrode slice is shaped as a cross multi-pole point. By adopting the structure, compared with the existing spark plug, the ignition efficiency of the spark plug of the invention is increased three times, the discharge scope is expanded three times, quad spark ignition and four-nucleus detonation combustion are achieved, and four-nucleus detonation stress is obtained (as shown in Figure 2b); the level of energy efficiency is increased, combustion is more sufficient, the fuel consumption is reduced, and exhaust gas emission is reduced; and the spark plug has the advantages of simple structure and process, good energy conservation and emission reduction effect, and the like, and can replace the existing spark plug to be used in spark-ignition engines.

Description

The spark plug of central electrode extension, multipole point, protruding-type

Technical field

The present invention relates to a kind of spark-ignition engine spark plug, particularly the spark plug of a kind of central electrode extension, multipole point, outstanding envelope, belongs to field of spark plugs.

Background technology

Existing common spark plugs all adopts mid-positive electrode, technology is very ripe, but only produce an electric spark due to during work, give me a little the burning mixture in gas cylinder, when engine works at running on the lower load, mist in combustion chamber often incomplete combustion and produce more free carbon, these carbon granules are upper outside except being deposited on chamber wall, also can be deposited in spark plug group portion, on shell, the resistance of deposit carbon is general all less, thus the insulating properties of spark plug is likely destroyed, high-tension current for igniting is related to from these sediments miss (or relate to miss a part), thus make can not form electric spark in electrode gap, gaseous mixture can not be lighted, such engine is also with regard to cisco unity malfunction.

And GU type (lateral electrode U-type groove), V-type groove (central electrode V-type groove), GT type (central electrode cross recess), they in common spark plugs lateral electrode, are opened a U-type groove, central electrode end face is opened the V-type groove of one 90 °, on central electrode end face, open the design of cross recessed, principle is all identical, and they are the product of Japan electric coating company, NGK company, Hitachi, Ltd respectively, in such lateral electrode, U-type groove and central electrode constitute gap, because lateral electrode adds the corner angle of trough, sparking voltage are reduced, become easy ignition, when electric spark is formed, lateral electrode will absorb spark heat, and this heat absorption makes spark weaken, and this cries flame arrest effect, after lateral electrode fluting, flame core and lateral electrode are not that face contacts, instead of the point cantact that trough rim is digonous, and thus flame arrest effect greatly reduces, ensure that the energy of electric spark, so reliably light combustion mixture, described is also only produce an electric spark, just flame core is a little bigger, when engine is at low temperature, during running on the lower load work, mist in combustion chamber often incomplete combustion and produce more free carbon, these carbon granules are upper outside except being deposited on chamber wall, also can be deposited on spark plug skirt section, on shell, the resistance of deposit carbon is general all less, thus the insulating properties of spark plug is likely destroyed, high-tension current for igniting is leaked away (or leaking away a part) from this deposit, thus make can not form spark in electrode gap, combustion mixture can not be lighted, such engine is also with regard to cisco unity malfunction.

As shown in Figure 1 a, 1 b, in Fig. 1 a 1 is wiring screw rod, and 2 is hollow insulator, and 3 is metal shells, and 4 is lateral electrodes, and 5 is central electrodes, and 6 is central electrode and the discharging gap between 5 and lateral electrode 4 for the basic structure of tradition common spark plugs and the course of work; Ignition coil high-voltage conducting wires nut (not shown) is enclosed within spark plug wiring screw rod 1, high-tension current is provided at ignition system, by wiring screw rod 1, conduct to central electrode 5, gap 6 between the end face discharge breakdown and lateral electrode 4 of central electrode 5, produce electric spark, the combustion mixture in ignition combustion room, promote piston (not shown) and come and go acting running (shown in Fig. 1 b); The structure of existing spark plug must produce an electric spark at work, and we know for common spark plugs, and its feature is that spark ignition scope is little, and energy is also little, and therefore when underload, low temperature, combustion position is unsatisfactory.

Summary of the invention

When the object of the invention is to overcome the work of above-mentioned existing common spark plugs, single-point ignition effectiveness is low, ignition range is little, energy is also little, engine combustion position when underload, low temperature is undesirable, energy consumption is high, discharge high, that the heat efficiency is low weak point, design one can cancel lateral electrode, cancel single-point igniting, be applicable to being arranged on spark-ignition engine uses the central electrode extension that ignition range times level expands, ignition effectiveness times level improves, combustion efficiency times level improves, multipole point, protruding-type spark plug.

The spark plug of central electrode extension of the present invention, multipole point, protruding-type, comprise wiring screw rod 7, hollow insulator 8, metal shell 9, sealing conductor 10, central electrode 11, outstanding housing 12, high-temperature alloy solder joint 13, gap 14, electrode points 15, electrode slice 16 and hot cell 17, it is characterized in that the end face weld receiving electrode sheet 16 of central electrode 11, to be extended down to outside electrode points 15 on the end face of outstanding housing 12, and on the end face vacating housing 12 of electrode points 15 correspondence welding high-temperature resisting alloy solder joint 13; Described outstanding housing 12 gives prominence at least 1 millimeter, electrode slice 16 at least two electrode points 15.

In order to adapt to the calorific value of engine, the present invention retains hot cell 17.

The spark plug of central electrode extension of the present invention, multipole point, protruding-type, due in cross electrode slice 16 be welded on the end face of central electrode 11, to be extended down on the end face of outstanding housing 12 outside electrode points 15, during work, four electrode points are discharged to the end face high-temperature alloy solder joint 13 of outstanding housing 12 simultaneously, produce combustion mixture in four spark ignition cylinders simultaneously, produce four cores detonation burning altogether, thus obtain four cores quick-fried stress altogether; Also can normally work when cancelling lateral electrode, have that structure, technique are simple, ignition range expands three times, ignition effectiveness improves three times, combustion efficiency improves three times (shown in Fig. 2 b), sufficient combustion and the good row advantage of effects of energy saving and emission reduction, can replace existing spark plug city spark-ignition engine is share.

Accompanying drawing explanation

Accompanying drawing 1a is the structural representation of existing plain edition spark plug, Fig. 1 b is process chart.

Accompanying drawing 2a is central electrode extension of the present invention, the structural representation of the spark plug of multipole point, protruding-type, Fig. 2 b are process charts.

Embodiment

Accompanying drawing 2a is the structural representation in preferred embodiment of the present invention, in figure 7 is wiring screw rod, and 8 is hollow insulator, and 9 is metal shells, 10 is sealing conductors, 11 is central electrodes, and 12 is outstanding housings, and 13 is high-temperature alloy solder joints, 14 is the gaps between high-temperature alloy solder joint 12 and electrode points 15,15 is electrode points, and 16 is electrode slices, and 17 is hot cells.

Primary structure of the present invention as shown in Figure 2 a, primarily of wiring screw rod 7, hollow insulator 8, metal shell 9, sealing conductor 10, central electrode 11, gives prominence to housing 12, high-temperature alloy solder joint 13, the gap 14 between high-temperature alloy solder joint 13 and electrode points 15, electrode points 15, electrode slice 16, hot cell 17; Described outstanding housing 12 is metal shell 9 threaded tip ledges at least 1 millimeter; Electrode points 15 at least two is the corresponding points of the high-temperature alloy solder joint 13 be extended down to outside electrode slice 16 on outstanding housing 12; The bottom that wherein central electrode 11 inserts hollow insulator 8 passes, the top that wiring screw rod 7 injects hollow insulator 8 is given prominence to, and conductor sealant 10 sealing-in is used in centre, makes wiring screw rod 7, hollow insulator 8 inserts in metal shell 9, to housing heating, then close with riveting limit riveting by machine; Described in cross electrode slice 16, the end face being put into central electrode 11 welds, adjusts the distance in the gap 14 between the high-temperature alloy solder joint 13 on electrode points 15 and outstanding housing 12 end face.

In order to improve ignition effectiveness and the effect of spark plug, the described electrode points 15 in cross electrode 16 has four; The described electrode points 15 in cross electrode slice 16 has four corresponding gaps 14 with the high-temperature alloy solder joint 13 on outstanding housing 12 end face, four electric sparks are produced during work, contrast now expands three times with common spark plugs ignition range, ignition effectiveness improves three times, (contrasting with shown in Fig. 1 b see Fig. 2 b Suo Shi), can light gaseous mixture reliably.

During work, high voltage line cap (not shown) is enclosed within wiring screw rod 7, high-tension current conducts to central electrode 11 through wiring screw rod 7 and arrives electrode slice 16 again, electric spark is produced by the gap 14 between the high-temperature alloy solder joint 13 on electrode points 15 discharge breakdown and outstanding housing 12 end face, combustion mixture in some gas cylinder, promotes piston back-and-forth movement acting; Described have four electrode points 15 in cross electrode slice 16, four corresponding gaps 14 are had with the high-temperature alloy solder joint 13 on outstanding housing 12 end face, four spark ignition combustion mixtures are produced during work, generation quadruple is lighted a fire, four cores altogether detonation burn, thus produce four cores quick-fried stress altogether, detonation stresses times level improves, (comparing with shown in Fig. 1 b as shown in Figure 2 b), corresponding burning time is abundant, and completely, discharge is less in burning, meet the requirement of energy-saving and emission-reduction, existing spark plug can be replaced to use in spark-ignition engine.

Claims

1. the spark plug of a central electrode extension, multipole point, protruding-type, comprise wiring screw rod 7, hollow insulator 8, metal shell 9, sealing conductor 10, central electrode 11, outstanding housing 12, high-temperature alloy solder joint 13, gap 14, electrode points 15, electrode slice 16 and hot cell 17, is characterized in that the threaded top end ledge at least 1 millimeter of metal shell 9; Outstanding housing 12, and at the end face of outstanding housing 12 and the corresponding points welding high-temperature resisting alloy solder joint 13 of electrode points 15, electrode slice 16 is put into the end face welding of central electrode 11, at least two electrode points 15 are extended on high-temperature alloy solder joint 13 corresponding to outstanding housing 12 end face, and the distance in gap 14 between adjusting.

2. the spark plug of a kind of central electrode extension, multipole point, protruding-type as claimed in claim 1, it is characterized in that the outstanding housing 12 of metal shell 9 threaded tip ledge at least 1 millimeter, and at the end face of outstanding housing 12 and the corresponding points welding high-temperature resisting alloy solder joint 13 of electrode points 15.

3. the spark plug of a kind of central electrode extension, multipole point, protruding-type as described in claim 1,2, is characterized in that electrode slice 16 at least two electrode points 15.

4. the spark plug of a kind of central electrode extension, multipole point, protruding-type as described in claim 1,2,3, multipole point igniting when it is characterized in that work, produce main multiple spark ignition, multinuclear altogether detonation burns (as shown in Figure 2 b).

5. as claim 1,2,3,4, as described in a kind of central electrode extension, multipole point, protruding-type spark plug, it is characterized in that multipole point igniting in work, produce many detonations altogether to burn, obtain multinuclear quick-fried stress altogether, a detonation stress times level is carried and being done (as shown in Figure 2 b).