CN2521793Y

CN2521793Y - Opening spark plug

Info

Publication number: CN2521793Y
Application number: CN 01265895
Authority: CN
Inventors: 张琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-22
Filing date: 2001-11-22
Publication date: 2002-11-20
Anticipated expiration: 2011-11-22

Abstract

The utility model relates to an opening spark plug for the ignition of a gasoline engine and a gas engine. The purpose is to overcome the defect in the prior art and provide an opening spark plug with low ignition voltage, large spark energy generated and long service life. The technical problem arranged in the utility model is that the utility model comprises a center electrode and a lateral electrode, wherein the orthogonal projection of the end of the lateral electrode in the axial direction of the center electrode is tangent to the cylinder face of the center electrode, and the end of the lateral electrode can be in a tooth shape. The tooth shape of the end of the lateral electrode is a shape of a round tooth, a triangular tooth, a saw tooth, a trapezoidal tooth, a rectangular tooth, a swallow tail tooth, etc. which can form closed angle correspondence with the center electrode, wherein a bilateral electrode is preferable. The utility model has the principle which is between a shielding type spark plug and an open type spark plug, overcomes the defects of the two spark plugs and integrates the advantages of the two spark plugs. The utility model is suitable especially for a gas engine.

Description

Open spark plug

Relate to the field:

The utility model relates to gasoline and the open spark plug of gas engine igniting.

Background technology:

The conventional ignition plug of using is the one-sided utmost point at present, this spark-plug side electrode front end centering electrode top forms a kind of electrode structure of protected type, in use, because lateral electrode has covered electric spark, limited contacting of electric spark and combustion mixture, just improved requirement, simultaneously because to spark plug fire nuclear expansion formation flame arrest effect to ignition voltage, reduce spark energy, thereby can cause mixture combustion insufficient, reduce engine power, increase oil consumption and waste gas.Spark plug through redesign is the shortcoming that overcomes conventional ignition plug, one, adopts the electrode structure of open type, be between the face of cylinder of the end orthographic projection of lateral electrode and central electrode certain interval to be arranged, find that through using this spark plug has the shortcoming of ignition point off-center electrode; When two, using the ring lateral electrode, because of its surface area is bigger, at surperficial heat accumulation, when temperature is too high, will cause the incandescent ignition phenomenon to occur, and reduce stability, above simultaneously 2 all will be shortened the useful life of spark plug significantly.

Summary of the invention:

The purpose of this utility model is ignition voltage to be required low for the shortcoming that overcomes prior art provides a kind of, and it is big to produce spark energy, and ignition point is in the open spark plug of center and long service life.

For achieving the above object, the technical solution of the utility model is: a kind of open spark plug, comprise central electrode 1 and lateral electrode 2, its special character is: described lateral electrode 2 ends exceed the end face of central electrode 1, and lateral electrode 2 is tangent along the face of cylinder of axial orthographic projection of central electrode 1 and central electrode 1.

The end of above-mentioned lateral electrode 2 can be a profile of tooth.

The profile of tooth of above-mentioned lateral electrode 2 ends is a round-arced tooth 3, lance tooth, and sawtooth, stepped tooth 4, rectangular teeth, dovetail teeth 5 etc. are various can to form the corresponding profile of tooth of wedge angle with central electrode 1.

Above-mentioned lateral electrode 2 has one, two or many, and two and many all are distributed in around the central electrode.

Above-mentioned lateral electrode 2 has two, and every is provided with dovetail tooth 5, and this scheme is a preferred plan, has both guaranteed that igniting is reliable, guarantees that again its surface temperature conduction is fast.

Compared with prior art, the utility model has adopted the Open architecture between protected type and open type, and 1. ignition gap forms the wedge angle correspondence, realize point discharge, low to the ignition voltage requirement, 2. point discharge, spark is expanded forward rapidly, can promote filling of gaseous mixture to send out burning, reduce and pollute, it is reliable to make it reach igniting, starts rapidly, save fuel oil, increase the effect of power; 3. because the igniting path is decontroled, and fire nuclear is grown up rapidly comprehensively, it is more abundant to burn, and effectively reduces carbon deposit, increases explosive force, improves power, saves fuel oil, reduces waste gas; 4. adopt multi-ignition, improved the reliability of igniting; 5. the bilateral utmost point of the present utility model not only forms short heterogeneous pathway than traditional lateral electrode, its conduction heat transfer property is more improved, overcome the electric conductivity instability, avoided simultaneously because of the too high phenomenon that causes incandescent ignition of lateral electrode surface temperature, make spark plug work more stable, prolong its useful life; 6. be highly suitable for large-scale production on the production line of conventional ignition plug.

The drawing explanation:

Fig. 1 is the screened spark plug structural representation;

Fig. 2 is an open type spark plug configuration schematic diagram;

Fig. 3 is the structural representation of the utility model monodentate bilateral polar spark plug;

Fig. 4 is the axial view of Fig. 3;

Fig. 5 is the axial view of another embodiment of Fig. 4;

Fig. 6 is the structural representation of the utility model bidentate bilateral polar spark plug;

Fig. 7 is the axial view of Fig. 6;

Fig. 8 is the structural representation of the one-sided polar spark plug of the utility model bidentate;

Fig. 9 is the axial view of Fig. 8.Description of reference numerals:

Electrocardiograph among the 1-, 2-lateral electrode, 3-round-arced tooth, 4-stepped tooth, 5-dovetail tooth.

Embodiment:

Referring to Fig. 1, lateral electrode 2 exceeds the end face of central electrode 1 and covers central electrode 1, forms shielding structure;

Referring to Fig. 2, the gap is left in lateral electrode 2 ends between the face of cylinder of axial orthographic projection of central electrode 1 and central electrode 1, form unenclosed construction;

Referring to Fig. 3, Fig. 4, Fig. 5, this example comprises two lateral electrodes 2, and the end of each lateral electrode 2 is profiles of tooth, can be round-arced tooth 3, also can be stepped tooth 4, and crown is tangent along the face of cylinder of axial orthographic projection of central electrode 1 and central electrode 1.

Referring to Fig. 6, Fig. 7, this example comprises two lateral electrodes 2, and each lateral electrode 2 is provided with dovetail tooth 5, and the crown of this dovetail tooth 5 is tangent along the face of cylinder of axial orthographic projection of central electrode 1 and central electrode 1.

Referring to Fig. 8, Fig. 9, this example comprises a lateral electrode 2, and this lateral electrode 2 is provided with dovetail tooth 5, and the crown of this dovetail tooth 5 is tangent along the face of cylinder of axial orthographic projection of central electrode 1 and central electrode 1.

Claims

1. an open spark plug comprises central electrode 1 and lateral electrode 2, it is characterized in that: described lateral electrode (2) end exceeds the end face of central electrode (1), and lateral electrode (2) is tangent along the face of cylinder of axial orthographic projection of central electrode (1) and central electrode (1).

2. as the said open spark plug of claim 1, it is characterized in that: described lateral electrode (2) end is a profile of tooth.

3. as the said open spark plug of claim 2, it is characterized in that: the profile of tooth of described lateral electrode (2) end is round tooth (3), lance tooth, sawtooth, stepped tooth (4), rectangular teeth or dovetail tooth (5).

4. as claim 2 or 3 said open spark plugs, it is characterized in that: described lateral electrode (2) has one, two or many, and two and many all are distributed in around the central electrode.

5. as the said open spark plug of claim 4, it is characterized in that: described lateral electrode (2) has two, and every is provided with dovetail tooth (5).