CN2146066Y - engine spark plug - Google Patents

Abstract

The utility model discloses engine spark plug is a spiro union part in its spark plug upper end, and its upper end upwards extends the bonding of two relative settings, and a central electrode is installed through an insulator to its inside, and a cutting groove is seted up to the relative department in clearance between this central electrode upper end and two bonding, when passing through high tension current, forms bilateral electrode spark. The utility model discloses a another kind of structure has divided two extension limits on its bonding, and on the central electrode, locate to set up a cutting groove relatively with the interval on two extension limits to make its single electrode volume reduce, increase the rate of heating.

Description

The utility model relates to an engine spark plug.

The main function of the spark plug is to generate sparks and ignite the air-fuel mixture in the combustion chamber. The basic structure of the spark plug is to have a central electrode on its body, and the other electrode (commonly known as ground iron) is welded on its shell. The two electrodes There is an air gap between them. When working, the high-voltage current flows from the voltage divider to the central electrode, and then jumps over the above-mentioned gap to generate sparks, so it can be ignited and burned when the piston compresses the mixed gas to the top dead center. In order for the engine to have good performance, the spark generated by the spark plug must be large enough and last long enough to effectively ignite the fuel mixture. If the spark of the spark plug is too weak or irregular, the unburned mixed gas will be discharged with the exhaust gas, which will not only cause air pollution, but also increase fuel consumption by 10% to 15%, wasting energy. Therefore, the structure of the spark plug must be guaranteed to be sufficient. Ignite the mixture.

The existing spark plug, as shown in FIG. 1, has a central electrode 10, and another electrode ground 20 extends upward from the top surface of the screwed part 11, and then bends to the top of the end surface 13 of the central electrode 10, so that a gap is formed between the two. a gap 14 . When high-voltage current is grounded 20 by central electrode 10, will produce spark, the quality of motor performance, one of its important factors is exactly whether this ignition mechanism can produce big enough spark. However, the existing spark plug is a single-side electrode ignition mechanism, which usually produces a weak spark and a small spark area, and the ignition effect of the mixed gas in the combustion chamber is not ideal.

Moreover, before the spark is produced, it must be extended by a flame nucleus. The structure of the above-mentioned existing spark plug may be generated anywhere between the electrodes because of its flame nucleus, and because the relative area of its electrodes is relatively large, it must be formed first. The electrode is heated for a longer time, so its flame generation rate is slower.

Another disadvantage of the existing spark plug is that due to the long heating time, the flame generation is relatively slow, so it will relatively form the quenching phenomenon that is common in the existing spark plug. This kind of quenching is reflected in the shortcomings of the vehicle. Taking the vehicle at 4000 R.P.M (revolutions per minute) as an example, when each of the four cylinders is at 1000 R.P.M, there will be dozens of spark plugs not ignited Therefore, there are disadvantages such as fuel consumption, no power and poor efficiency.

The purpose of the utility model is to provide an engine spark plug, which is provided with double-sided electrodes to increase the ignition area, thereby effectively igniting the mixed gas and reducing waste and harmful gas emissions.

Another object of the present invention is to provide a spark plug for an engine, which improves the electrode structure and reduces its volume, so as to increase the heating rate, reduce the quenching phenomenon, and improve the ignition efficiency.

The basic structure of the spark plug of the utility model is as follows: the upper end of the spark plug is a threaded part, and the upper end of the spark plug extends upwards to two oppositely arranged grounding irons, and a central electrode is installed inside it through an insulator, and the upper end of the central electrode is exposed, and between it and the two A cutting groove is opened opposite to the gap between the ground irons, so that when the central electrode passes a high-voltage current, bilateral electrode sparks are formed.

The utility model also has another structural form, that is, a ground has separate double extension sides, and on the central electrode below the ground, a cutting groove is opened opposite to the interval between the double extension sides, so that the single electrode The volume is reduced and the heating speed is increased.

The spark plug of the utility model has a wider and stronger ignition capacity, can effectively ignite the fuel mixture vapor in the combustion chamber, make the combustion more complete, and significantly reduce air pollution; moreover, it also improves the problem of fouling of the existing spark plug due to incomplete combustion. Disadvantages: Due to the enhancement of ignition, the ignition of the mixed gas is more rapid and effective, the engine is easy to start, and the operation is smooth and smooth. And because the electrode can be heated to generate flame in a relatively short time, in addition to increasing the efficiency, it can also prevent the phenomenon of quenching, thereby reducing fuel consumption and maintaining continuous power.

Below, the spark plug of the present utility model will be described in detail with reference to the accompanying drawings and embodiments.

Fig. 1 is a perspective view of a conventional spark plug.

Fig. 2 is a perspective view of the first embodiment of the utility model.

FIG. 3 is a front view of FIG. 2 .

FIG. 4 is a perspective cross-sectional view of FIG. 2 .

Fig. 5 is a schematic view of the first embodiment installed in the combustion chamber.

Fig. 6 is a perspective view of the second embodiment of the utility model.

FIG. 7 is a front view of FIG. 6 .

FIG. 8 is a partial perspective cross-sectional view of FIG. 6 .

Fig. 9 is a schematic view of the second embodiment installed in the combustion chamber.

The utility model spark plug, as shown in Figures 2 to 4, the upper end of the spark plug is a screw connection part 60, and a central electrode 62 exposed at the front end is installed in the center of its internal insulator; 64 , 65 ; after the two grounds 64 , 65 respectively extend upward for a certain length, they are relatively inwardly bent above the upper end surface 66 of the central electrode 62 and keep a certain distance therefrom.

In the preferred embodiment of the present utility model, a gap 67 is formed between the ends of the two grounding irons 64, 65. Below the gap 67, a cutting groove 68 is provided at the place where the end face 66 of the central electrode 62 is opposite to it. Thus, bilateral electrodes are formed.

Because the material for making the ground is wound in equal width in the factory, and then cut and bent one by one during manufacture, the advantage of the structure of this embodiment is that it can be used to make slightly longer wires without any changes. The whole piece of grounding is then bent and installed on the upper surface of the screwed part 60. The gap 67 between the two groundings and the cutting groove 68 of the central electrode 62 can be cut from top to bottom with a tool and processed simultaneously.

Referring to Fig. 5, the above-mentioned threaded part 60 can be assembled on the cylinder wall of the combustion chamber 70. When the high-voltage current passes, the two separated ground irons 64, 65 will form bilateral electrodes to ignite the two separated end faces of the central electrode 62, so that The spark 80 increases and its ignition area also increases effectively, which can ensure that the mixed gas in the combustion chamber is actually ignited.

Shown in Fig. 6 is the second embodiment of the present utility model, is also provided with a central electrode 62 in the center of spark plug, and the top end of threaded part 60 is provided with a bent ground iron 600 that extends independently, forms another electrode; A cutting groove 68 is also provided in the center of the end face of the electrode 62, and the ground 600 forms two separate extension pieces 602, 603 at the front end of the bent portion 601, which are generally U-shaped, so that the middle of the two extension pieces 602, 603 The gap 604 is substantially located above the cutting groove 68 .

As shown in Figures 7 and 8, the two extension pieces 602, 603 can just cooperate with the cutting groove 68 of the central electrode 62 to form bilateral electrodes. Effectively scale back.

Fig. 9 shows the state that embodiment 2 is installed in the combustion chamber 70, and its threaded part 60 is placed in the preset inner threaded hole of the combustion chamber wall, and its electrode part is ready to ignite the mixed gas toward the chamber. When a high-voltage current passes between the central electrode 62 and the ground 600 , sparks will be generated in a double-electrode manner.

Both embodiments of the present invention have the following advantages: because the area of each single electrode is reduced, it can be fully heated in a relatively short period of time, and the mixture in the combustion chamber 70 can be ignited by a flame produced quickly by any one of the side electrodes. steam. Simultaneously, because this kind of ignition only needs extremely short time, can reduce the occurrence of quenching phenomenon in the ignition operation of engine more.

Claims (3)

1, a kind of engine spark plug, it is characterized in that: spark plug upper end is a screw connection part 60, and the center electrode 62 that a front end exposes is installed in the center of its internal insulator; Extend two ground irons 64, 65; After the two grounding irons 64, 65 extend upward for a certain length, they are relatively inwardly bent above the upper end surface 66 of the central electrode 62 and keep a certain distance therefrom; a gap 67 is formed between the ends of the two grounding irons 64, 65 Under the gap 67, a cutting groove 68 is opened at the end surface 66 of the central electrode 62 opposite to it, so as to form double-sided electrodes. 2. A spark plug for an engine, characterized in that: a central electrode 62 is provided at the center of the spark plug, and a separately extended bending ground 600 is provided at the top of the screwed part 60 to form another electrode; on the end face of the central electrode 62 A cutting groove 68 is set in the center, and the ground 600 forms two separate extension pieces 602, 603 at the front end of the bent portion 601, so that the middle gap 604 of the two extension pieces 602, 603 is roughly located above the cutting groove 68, thereby forming bilateral electrodes. 3. The engine spark plug according to claim 2, characterized in that: the two extension pieces 602 and 603 of the ground 600 are roughly U-shaped.

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