CN220570049U - Spark plug - Google Patents

Abstract

A spark plug includes a center electrode, an insulator and a side electrode. The center electrode has an extension portion and an ignition end portion with an outer diameter smaller than the extension portion. The insulator is between the center electrode and the side electrode. The side electrode has a cap. The cap has a side ring wall surrounding the extension part with a gap formed with the extension part, and an end ring wall connected with the side ring wall and surrounding the ignition end part with a gap formed with the ignition end part. The side ring wall forms at least one opening, and the end ring wall forms at least one guide groove extending in the radial direction and communicating with the at least one opening. The cap structure can improve the efficiency of generating electric sparks and better ignite the mixture.

Description

spark plug

Technical field

The utility model relates to a spark plug (spark plug), in particular to a spark plug with an annular side electrode.

Background technique

Spark plugs are important parts for starting engines. How to improve the ignition efficiency of spark plugs is still a subject that requires continuous improvement.

Contents of the invention

An object of the present invention is to provide a spark plug that can improve ignition efficiency.

The spark plug of the utility model includes a center electrode, an insulator and a side electrode. The center electrode has a main body section and an exposed section connected to one end of the main body section. The exposed section has an extension portion extending from the main body section and a ignition end portion with an outer diameter smaller than the outer diameter of the extension portion. The insulator surrounds the body section. The side electrode has a metal shell surrounding a portion of the insulator close to the exposed section, and a cap connected to one end of the metal shell and spaced around the exposed section. The cap has a side ring wall connected to the metal shell and surrounding the extension part with a gap formed therewith, and an end ring wall connected with the side ring wall and surrounding the ignition end part with a gap formed with the ignition end part. The side ring wall forms at least one opening, and the end ring wall forms at least one guide groove extending in the radial direction and communicating with the at least one opening.

In some embodiments, the side annular wall forms a plurality of openings spaced apart along the circumferential direction, and the end annular wall forms a plurality of guide grooves extending in the radial direction and respectively connected with the openings.

The utility model has the following effects: the cap structure can improve the efficiency of generating electric sparks and better ignite the mixture.

Description of drawings

Other features and effects of the present utility model will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

Figure 1 is a perspective view of an embodiment of the spark plug of the present invention;

Figure 2 is a cross-sectional view taken along the II-II cut plane line in Figure 1;

Figure 3 is an incomplete perspective view illustrating the cap of this embodiment;

Figure 4 is a partial side view of this embodiment.

Detailed ways

Referring to Figures 1 to 4, an embodiment of the spark plug of the present invention includes a center electrode 1, an insulator 2 and a side electrode 3.

The center electrode 1 has a main body section 11 , an exposed section 12 connected to one end of the main body section 11 , and a connecting section 13 connected to the other end of the main body section 11 . The exposed section 12 has an extension portion 121 extending from the main body section 11 and an ignition end portion 122 with an outer diameter smaller than that of the extension portion 121 .

The insulator 2 surrounds the body section 11 . The insulator 2 is interposed between the center electrode 1 and the side electrode 3 so that the center electrode 1 and the side electrode 3 are not conductive to each other.

The side electrode 3 has a metal shell 31 surrounding a portion of the insulator 2 close to the exposed section 12 , and a cap 32 connected to one end of the metal shell 31 and spaced around the exposed section 12 . The cap 32 has a side annular wall 321 connected to the metal shell 31 and surrounding the extending part 121 with a gap formed between it and the extension part 121 , and a side annular wall 321 connected with the side annular wall 321 and forming a gap with the ignition end 122 surrounding the ignition end part 122 . One end of the firing end 122 surrounds the wall 322 . The side annular wall 321 forms at least one opening 323 , and the end annular wall 322 forms at least one guide groove 324 extending in the radial direction and communicating with the at least one opening 323 . In this embodiment, the side annular wall 321 forms a plurality of openings 323 spaced apart along the circumferential direction, specifically three, each spaced 120 degrees apart. The end ring wall 322 forms a plurality of guide grooves 324 that extend in the radial direction and are respectively connected with the openings 323. Specifically, two guide grooves 324 are formed corresponding to each opening 323. The guide groove 324 is adjacent to the ignition end 122 and extends in a radial direction, and can quickly guide gas from outside the cap 32 to the ignition end 122 .

In this embodiment, the cap 32 surrounds the ignition end 122 at intervals, which can improve the efficiency of generating sparks between the cap 32 and the ignition end 122 . Through the opening 323 and the guide groove 324, the mixture of air and gasoline can flow smoothly between the cap 32 and the ignition end 122, so that the spark plug can better ignite the mixture after generating an electric spark. .

To sum up, the cap 32 structure can improve the efficiency of generating electric sparks and better ignite the mixture.

The above are only examples of the present utility model, and should not be used to limit the scope of the present utility model. That is, any simple equivalent changes and modifications made in accordance with the claims and description of the present utility model are Still belong to the scope of the present utility model.

Claims (2)

1. A spark plug, characterized by: the spark plug comprises:

a center electrode having a main body section and an exposed section connected to one end of the main body section, the exposed section having an extension portion extending from the main body section and an ignition end portion having an outer diameter smaller than an outer diameter of the extension portion;

an insulator surrounding the body section; and

The side electrode, have the metal casing around the part near the exposing section of the insulator, and connect one end of the metal casing and interval around the cap of the exposing section, the cap has the side annular wall around the extending part with the interval of the extending part that connects the metal casing, and connect the side annular wall and around the end of the ignition with the interval of the ignition end, the side annular wall forms at least one opening, and the end annular wall forms at least one guide slot that extends along radial direction and communicates with the at least one opening.

2. The spark plug of claim 1, wherein: the side annular wall forms a plurality of holes which are distributed at intervals along the circumferential direction, and the end annular wall forms a plurality of guide grooves which extend along the radial direction and are respectively communicated with the holes.