Point discharge spark plug with V-shaped groove on side electrode

Abstract

The utility model discloses a point discharge spark plug with a side electrode provided with a V-shaped groove, which comprises an insulator, one end of the insulator is provided with a wiring nut, one end of the insulator far away from the wiring nut is provided with a shell, a central electrode is arranged in the insulator in a penetrating manner, one side of the shell is provided with a side electrode, and the side electrode is provided with a V-shaped groove. The central electrode penetrates through the shell and corresponds to the side electrode, the side electrode comprises an electrode bottom foot and an electrode main body arranged on the electrode bottom foot, the electrode main body is bent inwards, one end, far away from the electrode bottom foot, of the electrode main body is provided with an arc part, the arc part is connected with a first electrode end part and a second electrode end part, and the first electrode end part and the second electrode end part are connected with the shell. A V-shaped groove is formed between the first electrode end and the second electrode end, a sealing assembly is arranged on the shell and comprises a sealing outer ring and a sealing inner ring, a supporting ring is arranged in the sealing outer ring, one end of the supporting ring extends out of the sealing outer ring and is bent inwards, one end of the sealing inner ring abuts against the sealing outer ring, and the other end of the sealing inner ring abuts against the sealing inner ring. And the other end of the spring abuts against the supporting ring. The stability and durability of the sealing assembly are enhanced, the air tightness is further enhanced, and carbon deposition can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of spark plugs, in particular to a spark plug with a side electrode and a V-groove for tip discharge. Background Art

[0002] Spark plugs generate high-voltage electrical sparks, transferring ignition energy to the mixture in the combustion chamber, causing it to spontaneously ignite and release enormous amounts of energy. The design and material selection of the spark plug can influence the shape and energy of the spark, and thus the stability of combustion. The operating condition of the spark plug and the quality of combustion directly affect the engine's emissions. A good ignition system ensures more complete combustion, reduces harmful gas emissions, and meets environmental requirements.

[0003] Existing spark plugs typically use lip seals, which are not strong enough. Especially when exposed to high pressure for extended periods, the lip can easily deform permanently. Over-tightening the spark plug can lead to breakage, while under-tightening can also result in a poor seal. This can cause gas leakage from the combustion chamber and allow external gases or contaminants to enter the spark plug, impacting its operational stability and lifespan. Furthermore, carbon deposits are more likely to accumulate on the tip of the spark plug's electrode. These deposits interfere with arc discharge, reducing ignition performance and increasing the frequency of spark plug maintenance and replacement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a spark plug with a side electrode and a V-groove tip discharge, which enhances the stability and durability of the sealing component, further enhances the airtightness, and can effectively reduce carbon deposition.

[0005] In order to solve the above technical problems, the utility model provides a spark plug with a side electrode and a V-groove and a tip discharge, comprising an insulator, a wiring nut being provided at one end of the insulator, a shell being installed at the end of the insulator away from the wiring nut, a center electrode being passed through the insulator, a side electrode being provided on one side of the shell, the center electrode passing through the shell and corresponding to the side electrode, the side electrode comprising an electrode foot and an electrode body provided on the electrode foot, the electrode body being bent inwardly, an arc portion being provided at the end of the electrode body away from the electrode foot, a first electrode end and a second electrode end being connected to the arc portion, a V-groove being formed between the first electrode end and the second electrode end, a sealing assembly being provided on the shell, the sealing assembly comprising a sealing outer ring and a sealing inner ring, a support ring being provided inside the sealing outer ring, one end of the support ring extending out of the sealing outer ring and being bent inwardly, one end of the sealing inner ring abutting against the outer sealing ring, and the other end abutting against the support ring.

[0006] The sealing outer ring comprises an inner sealing wall and an outer sealing wall, a connecting wall is provided between the inner sealing wall and the outer sealing wall, and the inner sealing wall, the outer sealing wall and the connecting wall are integrally formed.

[0007] The shell is provided with a convex ring, the inner sealing wall abuts against the shell, and the connecting arm abuts against the convex ring.

[0008] The support ring includes a first support portion, a connecting portion and a second support portion. The first support portion is arranged perpendicular to the connecting portion, and the connecting portion is arranged perpendicular to the second support portion. The first support portion is inserted into the inner sealing wall, the connecting portion is inserted into the connecting wall, and the second support portion is inserted into the outer sealing wall.

[0009] A limiting portion is provided on the second supporting portion. The limiting portion passes through the outer sealing wall and bends inwardly. The inner sealing ring abuts against the limiting portion.

[0010] The cross section of the sealing inner ring is S-shaped.

[0011] The inner sealing wall is provided with a convex rib, and the shell is provided with a corresponding groove, and the convex rib is inserted into the groove.

[0012] The angle between the first electrode end and the second electrode end is between 30° and 32°.

[0013] A metal rod is provided on one side of the central electrode, and a resistance sealant is provided between the metal rod and the central electrode.

[0014] A powder chamber is provided inside the shell and the insulator.

[0015] When the present invention is in use, one end of the spark plug is connected to the ignition system via a wiring nut. The ignition system transmits a high-voltage current to the spark plug's center electrode, which is then conducted to its tip, creating a potential difference with the side electrodes. When the voltage exceeds a certain value, the insulation in the air is broken, generating a strong arc discharge and forming a spark between the center electrode and the side electrodes. This spark is concentrated and accelerated by the V-shaped groove, ensuring a more stable and intense spark, thereby effectively igniting the mixed gas in the combustion chamber. During the ignition process, the spark plug's sealing assembly plays a key role in the high-temperature and high-pressure environment within the combustion chamber. One end of the inner sealing ring abuts the limiter, and the other end abuts the outer sealing ring, forming a double sealing structure that prevents external gas from entering the interior and prevents leakage of high-pressure gas in the combustion chamber.

[0016] The beneficial effects brought by the utility model are:

[0017] The V-groove can reduce the dissipation of sparks, promote faster flame propagation, and improve ignition efficiency, thereby improving the combustion performance of the engine.

[0018] The utility model enhances the stability and durability of the sealing component and reduces the influence of vibration and thermal stress on the spark plug.

[0019] The utility model further enhances the air tightness, prevents leakage of high-pressure gas, and ensures that the spark plug can still work stably under extreme working conditions.

[0020] The smooth shape of the arc portion makes it difficult for carbon particles to adhere to the surface, which can effectively reduce carbon deposits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 It is a structural schematic diagram of the side electrode of the utility model.

[0023] Figure 3 It is a cross-sectional view of the present utility model.

[0024] Figure 4 yes Figure 3 A magnified view of center.

[0025] In the figure: 1. insulator; 2. wire nut; 3. shell; 4. center electrode; 5. side electrode; 6. electrode foot; 7. electrode body; 8. arc portion; 9. first electrode end; 10. second electrode end; 11. sealing assembly; 12. sealing outer ring; 13. sealing inner ring; 14. support ring; 15. limit portion; 16. inner sealing wall; 17. outer sealing wall; 18. connecting wall; 19. convex ring; 20. first supporting portion; 21. connecting portion; 22. second supporting portion; 23. convex rib; 24. groove; 25. metal rod; 26. resistor sealant; 27. powder chamber. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] according to Figures 1 to 4As shown, the utility model is a tip discharge spark plug with a side electrode 5 with a V-groove, comprising an insulator 1, a center electrode 4, a shell 3 and a side electrode 5. A wiring nut 2 is installed at one end of the insulator 1 for connecting to an external power source to ensure that the spark plug can stably receive current during operation. A shell 3 is installed at the end of the insulator 1 away from the wiring nut 2. The shell 3 serves as the external structural part of the spark plug and provides protection and fixing functions for the internal components. A center electrode 4 is penetrated inside the insulator 1. This electrode plays a key role in the operation of the entire spark plug and is responsible for receiving current from the power source and discharging through the tip. To achieve ignition in the combustion chamber, a side electrode 5 is also provided on one side of the shell 3. This side electrode 5 corresponds to the center electrode 4 and generates sparks through arc discharge between them. The side electrode 5 includes an electrode foot 6 and an electrode body 7. The electrode foot 6 is fixed to the shell 3 to provide stable support for the electrode. The electrode body 7 is bent inward and has an arc portion 8 at the end away from the electrode foot 6. The arc portion 8 is also connected to the first electrode end 9 and the second electrode end 10, forming a V-groove between the two, which reduces the flame extinguishing effect, makes the flame propagation speed faster, and further improves the efficiency and stability of ignition. In addition, a sealing assembly 11 is also provided on the shell 3 to ensure that the spark plug can maintain good sealing performance in the high-temperature and high-pressure combustion chamber environment to prevent gas leakage. The sealing assembly 11 includes a sealing outer ring 12 and a sealing inner ring 13. A support ring 14 is also provided inside the sealing outer ring 12. One end of the support ring 14 extends from the sealing outer ring 12 and bends inward. One end of the sealing inner ring 13 abuts against the outer sealing ring, and the other end abuts against the support ring 14. This double sealing structure can effectively prevent external gas or impurities from entering the interior of the spark plug, while ensuring that the spark plug still has a good sealing effect under high temperature and high pressure environment, thereby extending the service life of the spark plug.

[0028] The sealing outer ring 12 includes an inner sealing wall 16, an outer sealing wall 17 and a connecting wall 18 connecting the two. The three are integrally formed to ensure the firmness and stability of the overall structure. A convex ring 19 is provided on the shell 3. The inner sealing wall 16 abuts against the shell 3, and the connecting arm abuts against the position of the convex ring 19 on the shell 3, further enhancing the overall stability of the sealing structure and preventing external gas or pollutants from entering the interior of the spark plug through the contact surface. The support ring 14 includes a first support portion 20, a connecting portion 21 and a second support portion 22. The first support portion 20 is arranged perpendicular to the connecting portion 21, which is in turn arranged perpendicular to the second support portion 22. The first support portion 20 is disposed within the inner sealing wall 16, the connecting portion 21 is disposed within the connecting wall 18, and the second support portion 22 is disposed within the outer sealing wall 17, ensuring the stability of the outer sealing wall 17. A stopper 15 is also provided on the second support portion 22. The stopper 15 passes through the outer sealing wall 17 and bends inward, providing a fixing and limiting function. The inner sealing ring abuts against the stopper 15, ensuring that the inner sealing ring 13 does not bend excessively under high pressure, thereby improving its structural strength. The inner sealing ring 13 has an S-shaped cross-section, which improves its elasticity and sealing performance and ensures that it can quickly recover its shape after being subjected to pressure.

[0029] The inner sealing wall 16 is provided with a rib 23, and the shell 3 is provided with a corresponding groove 24. The rib 23 is inserted into the groove 24, which enhances the connection strength between the sealing assembly 11 and the shell 3 and effectively prevents the seal from being misplaced or shifted under high pressure and high temperature environments.

[0030] The angle between the first electrode end 9 and the second electrode end 10 is between 30° and 32°. A metal rod 25 is provided on one side of the center electrode 4, with a resistive sealant 26 positioned between the metal rod 25 and the center electrode 4 to prevent radio interference. A powder chamber 27 is located within the housing 3 and the insulator 1. This chamber is filled with a special powder. Commonly used filling materials include magnesium oxide, aluminum oxide, precious metal powder, and ceramic powder to enhance heat dissipation, insulation, shock resistance, and corrosion resistance.

[0031] When the present invention is in use, one end of the spark plug is connected to the ignition system via the wiring nut 2. The ignition system transmits a high-voltage current to the center electrode 4 of the spark plug. The high-voltage current is then conducted through the center electrode 4 to its tip, creating a potential difference with the side electrode 5. When the voltage exceeds a certain value, the insulation in the air is broken, generating a strong arc discharge, and forming a spark between the center electrode 4 and the side electrode 5. This spark is concentrated and accelerated by the V-shaped groove, ensuring a more stable and intense spark, thereby effectively igniting the mixed gas in the combustion chamber. During the ignition process, the spark plug's sealing assembly 11 plays a key role in the high-temperature and high-pressure environment within the combustion chamber. One end of the sealing inner ring 13 abuts against the limiter 15, and the other end abuts against the sealing outer ring 12, forming a double sealing structure that prevents external gas from entering the interior and prevents leakage of high-pressure gas in the combustion chamber.

[0032] The beneficial effects brought by the utility model are:

[0033] The V-groove can reduce the dissipation of sparks, promote faster flame propagation, and improve ignition efficiency, thereby improving the combustion performance of the engine.

[0034] The utility model enhances the stability and durability of the sealing component and reduces the influence of vibration and thermal stress on the spark plug.

[0035] The utility model further enhances the air tightness, prevents leakage of high-pressure gas, and ensures that the spark plug can still work stably under extreme working conditions.

[0036] The smooth shape of the arc portion makes it difficult for carbon particles to adhere to the surface, which can effectively reduce carbon deposits.

[0037] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A spark plug with a V-grooved side electrode and a tip discharge, comprising an insulator, a terminal nut provided at one end of the insulator, a housing mounted at the end of the insulator remote from the terminal nut, a center electrode extending through the insulator, and a side electrode provided on one side of the housing, the center electrode extending through the housing and corresponding to the side electrode, characterized in that: The side electrode includes an electrode foot and an electrode body arranged on the electrode foot, the electrode body is bent inward, and an arc portion is provided at one end of the electrode body away from the electrode foot, a first electrode end and a second electrode end are connected to the arc portion, a V-groove is formed between the first electrode end and the second electrode end, a sealing assembly is provided on the shell, the sealing assembly includes a sealing outer ring and a sealing inner ring, a support ring is provided inside the sealing outer ring, one end of the support ring extends out of the sealing outer ring and is bent inward, one end of the sealing inner ring abuts against the outer sealing ring, and the other end abuts against the support ring.

2. A spark plug with a V-groove side electrode and a tip discharge according to claim 1, characterized in that: The sealing outer ring comprises an inner sealing wall and an outer sealing wall, a connecting wall is provided between the inner sealing wall and the outer sealing wall, and the inner sealing wall, the outer sealing wall and the connecting wall are integrally formed.

3. The spark plug with a V-groove side electrode and a tip discharge according to claim 2, characterized in that: The shell is provided with a convex ring, the inner sealing wall abuts against the shell, and the connecting arm abuts against the convex ring.

4. The spark plug with a V-groove side electrode and a tip discharge according to claim 2, characterized in that: The support ring includes a first support portion, a connecting portion and a second support portion. The first support portion is arranged perpendicular to the connecting portion, and the connecting portion is arranged perpendicular to the second support portion. The first support portion is inserted into the inner sealing wall, the connecting portion is inserted into the connecting wall, and the second support portion is inserted into the outer sealing wall.

5. The spark plug with a V-groove side electrode and a tip discharge according to claim 4, characterized in that: A limiting portion is provided on the second supporting portion. The limiting portion passes through the outer sealing wall and bends inwardly. The inner sealing ring abuts against the limiting portion.

6. The spark plug with a V-groove side electrode and a tip discharge according to claim 1, characterized in that: The cross section of the sealing inner ring is S-shaped.

7. The spark plug with a V-groove side electrode and a tip discharge according to claim 2, characterized in that: The inner sealing wall is provided with a convex rib, and the shell is provided with a corresponding groove, and the convex rib is inserted into the groove.

8. The spark plug with a V-groove side electrode and a tip discharge according to claim 1, characterized in that: The angle between the first electrode end and the second electrode end is between 30° and 32°.

9. The spark plug with a V-groove side electrode and a tip discharge according to claim 1, characterized in that: A metal rod is provided on one side of the central electrode, and a resistance sealant is provided between the metal rod and the central electrode.

10. The spark plug with a V-groove side electrode and a tip discharge according to claim 1, characterized in that: A powder chamber is provided inside the shell and the insulator.

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