CN212114292U - Novel spark plug - Google Patents

Abstract

The utility model is suitable for an automobile engine accessory technical field provides a novel spark plug. This novel spark plug includes wiring nut, insulator, wiring screw rod, central electrode, ground electrode and casing, and wherein, the ground electrode is fixed on the tip that the wiring nut one end was kept away from to the casing, and the ground electrode encloses to be established in the periphery of central electrode, forms the discharge ignition space between ground electrode and the central electrode to the tip that casing one end was kept away from to the ground electrode is higher than the tip that insulator one end was kept away from to the central electrode, offers a plurality of bleeder vents of laying along the circumference direction of ground electrode on the lateral wall of ground electrode. The utility model discloses can enlarge the ignition space that discharges to the air current of mist can fully get into the ignition space that discharges through the bleeder vent unobstructed, thereby can make to ignite more reliably, and the mist burning is more abundant, has the advantage that the effect of igniting is good.

Description

Novel spark plug

Technical Field

The utility model belongs to the technical field of automobile engine accessory, especially, relate to a novel spark plug

Background

The spark plug is an important component in an ignition device of an automobile engine, mainly comprises a wiring nut, an insulator, a wiring screw rod, a central electrode, a ground electrode and a shell, and has the function of enabling high-voltage current to reach the position between the central electrode and the ground electrode through the wiring nut, and gas between the central electrode and the ground electrode is ionized to form positively charged ions and negatively charged free electrons. When the voltage between two electrodes reaches a certain value, it produces "breakdown" phenomenon, at the same time it forms "spark" to ignite the mixed gas in the cylinder of engine to make the engine work.

The spark discharge space between the center electrode and the ground electrode of the existing spark plug is not large enough, the ignition space is not enough, and because the spark plug works at high temperature and high pressure for a long time, the working environment is severe, carbon deposition often appears near the center electrode and the ground electrode of the spark plug, poor ignition can be caused if mixed gas cannot sufficiently enter a discharge area, the mixed gas is not sufficiently combusted, the power of an engine is reduced, and even the engine cannot normally work.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a novel spark plug, and it is not enough to aim at solving the discharge ignition space between the central electrode in the spark plug of prior art and the ground electrode, mixes other can not fully get into the discharge area and lead to the problem of ignition failure.

The embodiment of the utility model provides a realize like this, provide a novel spark plug, including wiring nut, insulator, wiring screw rod, central electrode, ground electrode and casing, the one end of wiring screw rod is connected with wiring nut, the other end of wiring screw rod is inserted and is arranged in the one end of insulator inside, the one end of central electrode is fixed at the other end of insulator, the other end of central electrode stretches out outside the insulator, central electrode with wiring screw rod electric connection, the casing is installed on the perisporium of insulator; the ground electrode is fixed on the end part of the shell far away from one end of the wiring nut, the ground electrode is arranged around the periphery of the central electrode, a discharge ignition space is formed between the ground electrode and the central electrode, the end part of the ground electrode far away from one end of the shell is higher than the end part of the central electrode far away from one end of the insulator, and a plurality of air holes distributed along the circumferential direction of the ground electrode are formed in the side wall of the ground electrode.

Further, the ground electrode has a hollow ring shape.

Further, the center electrode is located at an inner center position of the ground electrode.

Further, the distance between the central electrode and the ground electrode is 1.2mm-4.8 mm.

Furthermore, one end of the ground electrode, which is far away from the shell, is provided with a plurality of notches which are uniformly distributed along the circumferential direction of the ground electrode.

Further, the notches are six, a first tip is formed between every two adjacent notches, a second tip is formed at the bottom of each notch, the height of each first tip is higher than that of the end portion, far away from the insulator, of the central electrode, and the height of each second tip is lower than that of the end portion, far away from the insulator, of the central electrode.

Furthermore, the notch is formed by connecting a first inclined plane and a second inclined plane, an included angle between the first inclined plane and the second inclined plane is larger than 90 degrees, and the surface area of the second inclined plane is larger than that of the first inclined plane.

Further, the shell is provided with threads, and the inclined direction of the second inclined surface faces the screwing direction of the threads on the shell.

Furthermore, the central electrode is electrically connected with the wiring screw rod through resistance powder.

Further, the ground electrode is welded at an end of the case.

Compared with the prior art, the embodiment of the utility model, beneficial effect lies in: the utility model discloses an enclose the ground electrode and establish the peripheral formation of central electrode and discharge the ignition space, set up the bleeder vent on the lateral wall of ground electrode, the tip that casing one end was kept away from to the ground electrode is higher than the tip that insulator one end was kept away from to the central electrode, make the electrode field direction that forms between central electrode and the ground electrode form outside expansion effect, discharge the ignition space has been enlarged, and the air current of mist can smoothly fully get into the discharge ignition space through the bleeder vent, thereby can make the ignition more reliable, the mist burning is more abundant, the advantage that the effect of igniting is good has.

Drawings

Fig. 1 is a schematic perspective view of a novel spark plug provided by an embodiment of the present invention;

fig. 2 is a schematic front view of a novel spark plug according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the area A in FIG. 1;

FIG. 4 is a schematic longitudinal cross-sectional view of the novel spark plug of FIG. 2;

fig. 5 is a schematic perspective view of the ground electrode of fig. 2.

The figures are numbered: 1. a housing; 2. a wiring nut; 3. an insulator; 4. a wiring screw rod; 5. a center electrode; 6. a ground electrode; 7. resistance powder; 61. air holes are formed; 62. notch 63, first inclined plane; 64. a second inclined plane; 65. a first tip; 66. a second tip.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4, a novel spark plug according to an embodiment of the present invention is shown. The novel spark plug comprises a shell 1, a wiring nut 2, an insulator 3, a wiring screw rod 4, a central electrode 5 and a ground electrode 6, wherein one end of the wiring screw rod 4 is connected with the wiring nut 2, the other end of the wiring screw rod 4 is inserted into one end of the insulator 3, one end of the central electrode 5 is fixed at the other end of the insulator 3, the other end of the central electrode 5 extends out of the insulator 3, the central electrode 5 is electrically connected with the wiring screw rod 4 through resistance powder 7, the resistance powder 7 forms a resistance sealant, and the shell 1 is fixedly installed on the peripheral wall of the insulator 3. The ground electrode 6 is fixed on the end part of the shell 1 far away from one end of the wiring nut 2 through welding, the ground electrode 6 is arranged around the periphery of the central electrode 5, a discharge ignition space is formed between the ground electrode 6 and the central electrode 5, and mixed gas entering the discharge ignition space can be broken down by voltage between the ground electrode 6 and the central electrode 5 to generate sparks to ignite the mixed gas.

The end of the ground electrode 6 far away from the shell 1 is higher than the end of the central electrode 5 far away from the insulator 3, so that the electrode field direction formed between the central electrode 5 and the ground electrode 6 forms an outward expansion effect, and the ignition space is enlarged. The side wall of the ground electrode 6 is provided with a plurality of air holes 61 distributed along the circumferential direction of the ground electrode 6, so that the air flow fluidity is enhanced, the air flow of the mixed gas can smoothly and fully enter the discharge ignition space through the air holes 61, and the temperature of the ground electrode 6 can be reduced.

In the above embodiment, the ground electrode 6 has a hollow ring shape, and the center electrode 5 is disposed at a hollow center position inside the ground electrode 6, so that the discharge ignition space forms a uniform ground electrode 6 field space.

In the above embodiment, referring to fig. 5, a plurality of gaps 62 uniformly distributed along the circumferential direction of the ground electrode 6 are formed on one end of the ground electrode 6 away from the housing 1, so that the mixed gas can enter the discharge ignition space from the periphery of the ground electrode 6. Specifically, the notches 62 have six, a first tip 65 is formed between adjacent notches 62, a second tip 66 is formed at the bottom of each notch 62, the height of the first tip 65 is higher than that of the end of the central electrode 5 away from the insulator 3, and the height of the second tip 66 is lower than that of the end of the central electrode 5 away from the insulator 3. The notch 62 is approximately in a V shape, and the ground electrode 6 forms an annular hexagonal open electrode, so that the discharge ignition space is further enlarged, the ignition is more reliable, the mixed gas is combusted more uniformly, the energy-saving purpose is achieved, and the problem of poor ignition caused by the fact that the traditional spark plug blocks the mixed gas from entering a discharge area is solved.

In the above embodiment, the notch 62 is formed by connecting the first inclined surface 63 and the second inclined surface 64, the included angle between the first inclined surface 63 and the second inclined surface 64 is greater than 90 °, and the surface area of the second inclined surface 64 is greater than that of the first inclined surface 63, so that the ground electrode 6 can sufficiently bear the impact contact of the mixed gas. The shell is provided with threads, the inclined direction of the second inclined surface 64 faces the screwing direction of the threads on the shell, and then the second inclined surface 64 rushing towards the ground electrode 6 can be achieved, and then locking force can be given to the shell of the spark plug which is in threaded connection with an engine, so that the spark plug is connected more firmly.

In the above embodiment, the distance between the center electrode 5 and the ground electrode 6 is 1.2mm-4.8mm, so that the influence of carbon deposition generated near the center electrode 5 and the ground electrode 6 of the spark plug on the work of the spark plug is greatly reduced, and the service life of the spark plug is prolonged.

To sum up, the utility model discloses an enclose ground electrode 6 and establish the peripheral formation discharge ignition space at central electrode 5, set up bleeder vent 61 on ground electrode 6's lateral wall, the tip that 1 one end of casing was kept away from to ground electrode 6 is higher than the tip that insulator 3 one end was kept away from to central electrode 5, make the electrode field direction that forms between central electrode 5 and the ground electrode 6 form outside expansion effect, discharge ignition space has been enlarged, and the air current of mist can fully get into discharge ignition space through bleeder vent 61 unobstructed, thereby can make the ignition more reliable, the mist burning is more abundant, the advantage that has the effect of igniteing well.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A novel spark plug comprises a wiring nut, an insulator, a wiring screw rod, a central electrode, a ground electrode and a shell, wherein one end of the wiring screw rod is connected with the wiring nut, the other end of the wiring screw rod is inserted into one end of the insulator, one end of the central electrode is fixed to the other end of the insulator, the other end of the central electrode extends out of the insulator, the central electrode is electrically connected with the wiring screw rod, and the shell is installed on the peripheral wall of the insulator; the ground electrode is fixed on the end part of the shell far away from one end of the wiring nut, the ground electrode is arranged around the periphery of the central electrode, a discharge ignition space is formed between the ground electrode and the central electrode, the end part of the ground electrode far away from one end of the shell is higher than the end part of the central electrode far away from one end of the insulator, and a plurality of air holes distributed along the circumferential direction of the ground electrode are formed in the side wall of the ground electrode.

2. The novel spark plug of claim 1 wherein said ground electrode is in the shape of a hollow ring.

3. The spark plug according to claim 1 or 2, wherein said center electrode is located at an inner center position of said ground electrode.

4. The novel spark plug of claim 3 wherein the distance between said center electrode and said ground electrode is between 1.2mm and 4.8 mm.

5. The spark plug as claimed in claim 1 or 2, wherein the end of the ground electrode away from the shell is provided with a plurality of notches uniformly arranged along the circumferential direction of the ground electrode.

6. The novel spark plug of claim 5 wherein said notches are six in number, with a first tip defined between adjacent ones of said notches and a second tip defined at the bottom of said notches, said first tip being taller than the end of said center electrode distal from said insulator, said second tip being shorter than the end of said center electrode distal from said insulator.

7. The spark plug of claim 6 wherein said gap is defined by a first angled surface and a second angled surface, said first angled surface being angled with respect to said second angled surface by an angle greater than 90 °, said second angled surface having a surface area greater than a surface area of said first angled surface.

8. The spark plug of claim 7 wherein said shell has threads thereon and said second ramp is inclined in a direction toward the direction of the advance of said threads on said shell.

9. The spark plug of claim 1 wherein said center electrode is electrically connected to said terminal screw by a resistive powder.

10. The novel spark plug of claim 1 wherein said ground electrode is welded to an end of said shell.

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