CN85200952U - Convex earth electrode spark plug - Google Patents

Abstract

The utility model relates to an improvement on a spark plug for internal combustion engines. The utility model is a spark plug, two or three or four lower edges are projected in the center of an ignition face of an earth electrode corresponding to a central electrode. The utility model can reduce sparking voltage and ignite easily and has the advantages of reliable ignition, complete combustion and convenient adjustment. The utility model can be used in various internal combustion engines, and thereby, the purposes of fuel saving, reliable work and little exhaust pollution are obtained.

Description

Convex earth electrode spark plug

The utility model relates to the improvement of ignition plug for I. C. engine.

It is that both sides or the lower spark plug in three limits or four limits are protruded in central authorities on a kind of ignition face of the ground electrode relative with central electrode, as Fig. 1.Fig. 2 expresses a kind of typical electrode structure of the present utility model.

Existing spark plug as shown in Figure 3.Under the ignition system high voltage pulse, produce electric spark between its central electrode 1 and the ground electrode 2, thereby the gaseous mixture in the ignition combustion chamber promotes the piston work done, makes internal combustion engine operation.This spark plug electrode structure as shown in Figure 4.Its ground electrode 2 and central electrode 1 relative ignition face 3 is planes.When forming electric spark, ground electrode 2 can be inhaled receipts And and take away a part of spark heat, thereby spark temperature and energy are reduced.Because it is big to be plane ground electrode and flame contact range, thereby the heat of taking away is also just many, can cause stopping working in the time of seriously, " the flame arrest effect " of Here it is common spark plug ground electrode.

The ground electrode that the utility model protrudes by means of central authorities reduces sparking voltage, reduces the flame arrest effect, to improve spark plug ignition quality and igniting reliability.

The utility model spark plug (see figure 1) has wiring nut 4, wiring screw rod 5, insulator 6, box hat 7, packing ring 8, central electrode 9 and be welded on ground electrode 10 on the box hat 7 etc.Its ignition face 11 central authorities with respect to the ground electrode 10 of central electrode 9 protrude, and both sides or three limits or four limits are lower, as shown in Figure 2.Form and direction that part 12 is protruded in central authorities can be various, and Fig. 5 expresses wherein two kinds of typical protrusion directions.Fig. 6 expresses several possible section shape of protrusion.

The utility model possesses following characteristics:

1. because ground electrode is not plane but projection, this protruding rafter 12 is low more than the gap of plane and central electrode formation with the sparking voltage in the gap that central electrode 9 constitutes, therefore, the arcing of can discharging under than low ignition voltage, ignition quality is good.Spark gap might be strengthened, and igniting is reliable, and burning fully.Particularly be easy to light Weak mixture, the idling for internal combustion engine stability is improved, saving oil plant, exhaust pollution are reduced;

2. because after forming spark, flame nuclear only contacts with the protruding rafter 12 of ground electrode, so contact-making surface is little, the heat that the ground electrode absorption is taken away is few, and the flame arrest effect is little, thereby gets angry reliable;

3. as shown in Figure 7, because the protruding rafter 12 of ground electrode 10 is horn-like with the gap 13 that central electrode 9 constitutes, so flame is easy to diffusion, combustion propagation speed is fast, and mixture combustion is abundant;

4. because the gap forms horn-likely, be convenient to incoming mixture and enter ignition gap 13, so flammability is good, igniting is reliable;

5. common spark plug ground electrode after using ablation can form pit, make the gap adjustment that difficulty take place, and the utility model because protruding, ground electrode central authorities can not form pit after normal the ablation yet, so be easy to the adjusting play, easy to use.

Description of drawings:

Fig. 1 is that the front view of the utility model spark plug and A are to partial view;

Fig. 2 is the utility model spark plug electrode structure schematic diagram;

Fig. 3 is that common spark plug front view and B are to partial view;

Fig. 4 is common spark plug electrode structure schematic diagram;

Fig. 5 expresses ground electrode and protrudes two kinds of typical directions partly;

Fig. 6 protrudes several possible section shape partly;

Fig. 7 is that the arcing gap forms trumpet-shaped schematic diagram;

Enforcement of the present utility model can after the ground electrode welding, extrude protruding rafter with processing modes such as punching presses on ground electrode on the basis of spark plug processing usually; Weld after also the wire rod that ground electrode can be used is rolled into Fig. 6 cross sectional shape.

Claims (2)

1. one kind by wiring nut 4, wiring screw rod 5, insulator 6, box hat 7, packing ring 8, central electrode 9 and be welded on the spark plug that the ground electrode 10 on the box hat 7 is formed, ignition face 11 central authorities that are characterized in ground electrode 10 protrude, and both sides or three limits or four limits are lower.

2. spark plug according to claim 1 is characterized in that the form and the direction of ignition face 11 central authorities' protrusion parts 12 of ground electrode 10 can be diversified.