A bipolar spark plug firing pin

Abstract

The utility model discloses a kind of double-pole spark plug ignition electrode needle, belong to ignition spark plug technical field, including spark plug metal shell, the side of spark plug metal shell is provided with center electrode unit and two side electrode units, the other side of spark plug metal shell has threaded connection part, the center electrode unit is located at the center position of the side of spark plug metal shell, and center electrode unit and spark plug metal shell coaxial heart layout, the center electrode unit includes the center electrode rod installed in the side of spark plug metal shell and the heat conduction core in the inner wall of center electrode rod;By setting side electrode unit in symmetry relative to center electrode unit, the ignition of more uniform can be realized in the mode of double-pole symmetry arrangement, to further can guarantee that ignition energy is more concentrated in ignition gap, effectively improve ignition success rate, avoid the energy consumption brought by multiple ignition.

Description

Technical Field

[0001] This utility model belongs to the field of spark plug technology, specifically relating to a bipolar spark plug ignition electrode. Background Technology

[0002] As the core ignition component of an internal combustion engine, the performance of the spark plug's ignition electrode directly affects ignition efficiency, engine power output, and fuel economy.

[0003] Most existing spark plug ignition electrodes use a single-electrode or traditional bipolar structure, which has the following drawbacks:

[0004] The electrode gap and arrangement design of traditional bipolar electrode needles are unreasonable, and energy is easily dispersed to the periphery during ignition, resulting in a low ignition success rate. Especially under high engine speed and high load conditions, misfire is likely to occur.

[0005] Most existing electrode needles are made of a single nickel alloy, which is not resistant to high temperature and corrosion. After long-term use, the electrode is prone to burning and carbon buildup, which shortens the spark plug's service life and increases maintenance costs.

[0006] The imperfect heat conduction structure design of the electrode needle and spark plug body means that the high temperature generated during ignition cannot be quickly conducted to the outside, which can easily lead to overheating and deformation of the electrode, further reducing ignition performance.

[0007] Therefore, we propose a bipolar spark plug ignition electrode. Utility Model Content

[0008] The purpose of this invention is to provide a bipolar spark plug ignition electrode to solve the problems mentioned in the background art, such as the unreasonable electrode gap and arrangement design of traditional bipolar electrodes, which easily disperses energy to the periphery during ignition, resulting in a low ignition success rate. Especially under high engine speed and high load conditions, misfire is prone to occur. Existing electrodes are mostly made of a single nickel alloy material, which has insufficient high temperature resistance and corrosion resistance. After long-term use, the electrodes are prone to ablation and carbon buildup, shortening the spark plug's service life and increasing maintenance costs. The heat conduction structure design of the electrode and spark plug body is not perfect, and the high temperature generated during ignition cannot be quickly conducted to the outside, which can easily lead to electrode overheating and deformation, further reducing ignition performance.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a bipolar spark plug ignition electrode, comprising a spark plug metal housing, wherein a central electrode unit and two side electrode units are provided on one side of the spark plug metal housing, and a threaded connection portion is provided on the other side of the spark plug metal housing;

[0010] The center electrode unit is located at the center of one side of the spark plug metal housing, and the center electrode unit is coaxially arranged with the spark plug metal housing. The center electrode unit includes a center electrode rod installed on the side of the spark plug metal housing and a heat-conducting core penetrating the inner wall of the center electrode rod. The end of the center electrode rod away from the spark plug metal housing has an ignition end, and the heat-conducting core extends to the ignition end port.

[0011] The two side electrode units are arranged in a 180-degree ring around the center electrode unit, one above the other. The side electrode unit includes a side electrode rod installed on the side of the spark plug metal housing. The end of the side electrode rod away from the spark plug metal housing has an arc-shaped part, and the arc-shaped part is arranged towards the ignition end of the center electrode rod.

[0012] An ignition gap is formed between the central electrode rod and the two side electrode rods.

[0013] By adopting the above scheme, the bipolar symmetrical arrangement of the side electrode units, which are symmetrically arranged relative to the central electrode unit, can achieve more uniform ignition. This ensures that the ignition energy is more concentrated in the ignition gap, effectively improving the ignition success rate and avoiding energy consumption caused by multiple ignitions. By using wear-resistant layer one and wear-resistant layer two in combination, the service life of the electrode needle can be effectively improved, and electrode ablation can be avoided. By setting an excellent heat-conducting core through the central electrode rod, the high temperature generated during ignition can be quickly conducted away, preventing electrode overheating and deformation and ensuring long-term stable ignition.

[0014] In a preferred embodiment, the outer surface of the ignition end of the central electrode rod is coated with a wear-resistant layer one, and the area of ​​the arc-shaped portion of the side electrode rod facing the ignition end is coated with a wear-resistant layer two.

[0015] By adopting the above solution, the wear-resistant layer 1 set at the end of the central electrode rod and the wear-resistant layer 2 set on the arc-shaped part of the side electrode rod work together to effectively ensure that the central electrode rod and the side electrode rod have excellent wear and corrosion resistance during ignition, and effectively improve their service life.

[0016] In a preferred embodiment, the end of the heat-conducting core facing the spark plug metal housing is welded to the spark plug metal housing via a welding part.

[0017] By adopting the above solution, the welding part can effectively connect the heat-conducting core and the spark plug metal shell, and ensure good heat conduction effect.

[0018] In a preferred embodiment, an insulating mounting base is fixedly installed on the side of the spark plug metal housing, and the insulating mounting base is sleeved outside the central electrode rod and located between the two side electrode rods.

[0019] With the above solution, the insulating mounting base is located between the center electrode rod and the side electrode rod, which can effectively prevent the center electrode rod and the side electrode rod from conducting directly, thus achieving a good voltage isolation effect.

[0020] In a preferred embodiment, both the first wear-resistant layer and the second wear-resistant layer are made of platinum-iridium alloy.

[0021] By adopting the above scheme and utilizing the excellent high-temperature resistance and wear resistance of platinum-iridium alloy, the overall service life can be effectively improved.

[0022] In a preferred embodiment, the insulating mounting base is specifically made of alumina ceramic.

[0023] By adopting the above scheme and using high-purity alumina ceramic as the insulating mounting base, the insulation performance can be effectively improved. Alumina ceramic also has excellent thermal conductivity, so it can be used for auxiliary heat dissipation, and it also has high temperature resistance.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] The bipolar spark plug ignition electrode needles, by setting side electrode units symmetrically arranged relative to the central electrode unit, can achieve more uniform ignition through bipolar symmetrical arrangement. This ensures that the ignition energy is more concentrated in the ignition gap, effectively improving the ignition success rate and avoiding energy consumption caused by multiple ignitions.

[0026] The bipolar spark plug ignition electrode needle, through the combination of wear-resistant layer one and wear-resistant layer two, can effectively improve the service life of the electrode needle and avoid electrode erosion.

[0027] This bipolar spark plug ignition needle features an excellent heat-conducting core that runs through the central electrode rod, allowing for rapid conduction of the high temperatures generated during ignition. This prevents the electrode from overheating and deforming, ensuring long-term stable ignition. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a structural schematic diagram of the cross-section of the central electrode rod and the insulating mounting base of this utility model.

[0030] In the diagram: 1. Spark plug metal shell; 2. Center electrode unit; 3. Side electrode unit; 4. Threaded connection; 5. Heat-conducting core; 6. Center electrode rod; 7. Wear-resistant layer one; 8. Welded part; 9. Side electrode rod; 10. Wear-resistant layer two; 11. Insulating mounting base; 12. Ignition gap. Detailed Implementation

[0031] Please see Figure 1-2 This utility model provides a bipolar spark plug ignition electrode, including a spark plug metal shell 1. An insulating mounting seat 11 is fixedly installed on the side of the spark plug metal shell 1. The insulating mounting seat 11 is sleeved outside the center electrode rod 6 and located between the two side electrode rods 9. The insulating mounting seat 11 is located between the center electrode rod 6 and the side electrode rods 9, which can effectively prevent the center electrode rod 6 and the side electrode rods 9 from being directly connected, and achieves a good voltage isolation effect.

[0032] The insulating mounting base 11 is made of alumina ceramic. Using high-purity alumina ceramic as the insulating mounting base 11 can effectively improve the insulation performance. Alumina ceramic also has excellent thermal conductivity, so it can be used for auxiliary heat dissipation and has high temperature resistance. A central electrode unit 2 and two side electrode units 3 are provided on one side of the spark plug metal shell 1, and a threaded connection part 4 is provided on the other side of the spark plug metal shell 1.

[0033] The center electrode unit 2 is located at the center of one side of the spark plug metal housing 1, and is coaxially arranged with the spark plug metal housing 1. The center electrode unit 2 includes a center electrode rod 6 installed on the side of the spark plug metal housing 1 and a heat-conducting core 5 penetrating the inner wall of the center electrode rod 6. In a preferred embodiment, the outer surface of the ignition end of the center electrode rod 6 is coated with a wear-resistant layer 7, and the area of ​​the arc-shaped part of the side electrode rod 9 facing the ignition end is coated with a wear-resistant layer 10. The wear-resistant layer 7 provided at the end of the center electrode rod 6 and the wear-resistant layer 10 provided on the arc-shaped part of the side electrode rod 9 work together to effectively ensure that the center electrode rod 6 and the side electrode rod 9 have excellent wear and corrosion resistance during ignition, effectively improving their service life.

[0034] The materials of wear-resistant layer 7 and wear-resistant layer 10 are both platinum-iridium alloy. The excellent high temperature resistance and wear resistance of platinum-iridium alloy can effectively improve the overall service life.

[0035] The end of the center electrode rod 6 away from the spark plug metal housing 1 has an ignition end, and the heat-conducting core 5 extends to the ignition end port. In a preferred embodiment, the end of the heat-conducting core 5 facing the spark plug metal housing 1 is welded to the spark plug metal housing 1 through a welding part 8. The welding part 8 can effectively connect the heat-conducting core 5 and the spark plug metal housing 1 and ensure good heat conduction.

[0036] Two side electrode units 3 are arranged in a 180-degree ring around the center electrode unit 2, one above the other. The side electrode unit 3 includes a side electrode rod 9 installed on the side of the spark plug metal housing 1. The end of the side electrode rod 9 away from the spark plug metal housing 1 has an arc-shaped part, and the arc-shaped part is arranged towards the ignition end of the center electrode rod 6.

[0037] An ignition gap 12 is formed between the central electrode rod 6 and the two side electrode rods 9.

[0038] When using:

[0039] The spark plug metal housing 1 is installed using the threaded connection part 4;

[0040] When an internal combustion engine needs to be ignited, the ignition coil converts low-voltage electrical energy into high-voltage electrical energy, and transmits it to the center electrode rod 6 and the side electrode rod 9 through the conductive rod in the spark plug. The center electrode rod 6 serves as the main carrier, and the center electrode rod 6 and the side electrode rod 9 can quickly combine the high-voltage electricity to achieve ignition.

[0041] For heat dissipation, the heat-conducting core 5 embedded in the central electrode rod 6 can transfer the high temperature generated during ignition to the spark plug metal shell 1, and then dissipate it to achieve heat dissipation.

[0042] Insulation isolation is achieved during ignition by using the insulating mounting base 11 to achieve insulation isolation between the center electrode rod 6 and the side electrode rod 9.

Claims

1. A double electrode spark plug firing tip, characterized by: The spark plug includes a spark plug metal housing (1), one side of which is provided with a central electrode unit (2) and two side electrode units (3), and the other side of which has a threaded connection (4). The center electrode unit (2) is located at the center of one side of the spark plug metal housing (1), and the center electrode unit (2) is coaxially arranged with the spark plug metal housing (1). The center electrode unit (2) includes a center electrode rod (6) installed on the side of the spark plug metal housing (1) and a heat-conducting core (5) penetrating the inner wall of the center electrode rod (6). The end of the center electrode rod (6) away from the spark plug metal housing (1) has an ignition end, and the heat-conducting core (5) extends to the ignition end port. The two side electrode units (3) are arranged in a 180-degree ring around the center electrode unit (2), one above the other. The side electrode unit (3) includes a side electrode rod (9) installed on the side of the spark plug metal housing (1). The side electrode rod (9) has an arc-shaped part at the end away from the spark plug metal housing (1), and the arc-shaped part is arranged towards the ignition end of the center electrode rod (6). An ignition gap (12) is formed between the central electrode rod (6) and the two side electrode rods (9).

2. The bipolar spark plug firing pin of claim 1, wherein: The outer surface of the ignition end of the central electrode rod (6) is coated with a wear-resistant layer one (7), and the area of ​​the arc-shaped part of the side electrode rod (9) facing the ignition end is coated with a wear-resistant layer two (10).

3. The bipolar spark plug firing pin of claim 1, wherein: The end of the heat-conducting core (5) facing the spark plug metal shell (1) is welded to the spark plug metal shell (1) through a welding part (8).

4. The bipolar spark plug firing pin of claim 1, wherein: An insulating mounting base (11) is fixedly installed on the side of the spark plug metal housing (1). The insulating mounting base (11) is sleeved outside the central electrode rod (6) and located between the two side electrode rods (9).

5. The bipolar spark plug firing pin of claim 2, wherein: The material of the first wear-resistant layer (7) and the second wear-resistant layer (10) are both platinum-iridium alloy.

6. The bipolar spark plug firing pin of claim 4, wherein: The insulating mounting base (11) is specifically made of alumina ceramic.

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