CN103050890A

CN103050890A - Improved spark plug

Info

Publication number: CN103050890A
Application number: CN2013100143782A
Authority: CN
Inventors: 柳孟柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-15
Filing date: 2013-01-15
Publication date: 2013-04-17

Abstract

The invention relates to a part of an internal combustion engine, in particular to an improved spark plug. The improved spark plug comprises a case and an insulation porcelain core fixedly arranged in the case, wherein a center electrode is arranged in the insulation porcelain core, the upper end of the center electrode extends out of the insulation porcelain core to form a discharging tail end, the discharging tail end is positioned in a flame jetting cavity, a grounding electrode approaching to the discharging tail end is arranged in the flame jetting cavity, the case is provided with the flame jetting cavity, and the flame jetting cavity is provided with a gradually gathered opening, and the periphery of the opening is provided with flame jetting holes communicated with the inside and the outside of the flame jetting cavity. A discharging ignition device consisting of the center electrode and the grounding electrode is arranged in the flame jetting cavity, the flame jetting cavity is provided with the gradually gathered opening, and the periphery of the opening is provided with the flame jetting holes, so in the structure, the jet flame is powerful, meanwhile, the flame jet range of the flame is wide, and the efficient ignition environment is created.

Description

A kind of improved spark plug

Technical field

The present invention relates to a kind of gas engine part, relate in particular to a kind of improved spark plug.

Background technology

Spark ignition engine is by the air-fuel mixture in the spark ignitor combustion chamber.The performance of spark plug directly has influence on the performance of engine, if the indoor air-fuel mixture of ignition combustion that spark plug can not be correct, at least the fuel that has part in the combustion chamber can not burn, this will cause the loss of engine power, the increase of the reduction of oil inflame efficient and hydrocarbon discharge capacity.

Summary of the invention

The invention provides the high improved spark plug of a kind of ignition effectiveness.In order to realize the foregoing invention purpose, the present invention has adopted following technological means:

A kind of improved spark plug comprises shell and is fixedly installed in the interior insulated ceramic core of shell; In the described insulated ceramic core central electrode is housed; The upper end of described central electrode is stretched out insulated ceramic core and is formed a discharge end; Described discharge end is in the flame chamber; Be provided with in the described flame chamber and approach the terminal grounding electrode of discharge; Described shell has a flame chamber; Described flame chamber has an opening that closes up gradually; Be provided with the inside and outside fire jetting hole in UNICOM flame chamber around the described opening.

Inside, described flame chamber is circular cylindrical cavity, and opening draws in gradually from the inside to the outside and is frusto-conical; Described fire jetting hole is evenly distributed on the opening perimeter;

Described fire jetting hole is perpendicular to the flame cavity wall;

Described fire jetting hole is inclined upwardly and is 60 ° of angles with the flame cavity wall.

Beneficial effect of the present invention is: the discharge ignition apparatus of central electrode and grounding electrode formation is arranged in the flame chamber, the flame chamber has an opening that closes up gradually, fire jetting hole is set around the opening, such structure is so that the flame of ejection is more powerful, the scope of simultaneously flame injection is large, has created an efficiently some fire environment; Fire jetting hole is inclined upwardly, and is conducive to the flame ejection, further strengthens ignition effectiveness.

Description of drawings

Fig. 1 is the structural representation of a kind of improved spark plug of the present invention;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the B-B cutaway view of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing, the preferred implementation of a kind of improved spark plug of the present invention is made detailed description:

Shown in Fig. 1 is the structural representation of a kind of improved spark plug of the present invention.The same with conventional spark plug, this improved spark plug is installed on the cylinder cover of internal combustion engine and uses.This improved spark plug mainly comprises shell 1 and insulated ceramic core 2.Shell 1 is steel, and as shown in Figure 2, the upper end of shell 1 is cylindric, and cylindrical outer wall is provided with screw thread 14, and in order to the spark plug sealing is installed on the cylinder cover, as shown in Figure 3, there is a hexagon afterbody 15 lower end of shell 1, in order to adapt to reversing of pipe wrench.

Shell 1 inside is the cavity of up/down perforation, and the first half of cavity is flame chamber 11, and the latter half seals embedded installing insulating porcelain core 2.Flame chamber 11 is and concentric cylindric of shell 1 substantially, the waist inwall in flame chamber 11 is to projecting inward, form a circular ledge, the grounding electrode 12 of spark plug namely, grounding electrode 12 from the annulus outer to annulus in along gradually attenuation, be blade-like, the upper surface of annulus is the bowl-shape of indent, the lower surface of annulus is frusto-conical, thereby flame chamber 11 is separated into

flame epicoele

111 and 112 two chambers of flame cavity of resorption that are interconnected, flame epicoele 111 is with a bowl-shape bottom, and flame cavity of resorption 112 is with the top of a frusto-conical.

The upper end in flame chamber 11 has an opening that inwardly closes up gradually 16, opening 16 specifically is frusto-conical, opening 16 is limited out by the blade-like antelabium of an annular, this lip portion is blocked towards the passage in flame chamber 11 so that the inlet area of opening 16 only have flame chamber 11 the cylindrical cross-section area 1/4.

Be provided with the inside and outside fire jetting hole 17 in a plurality of UNICOMs flame chamber 11 around the opening 16, fire jetting hole 17 be cylindrical straight hole, and it is towards being inclined upwardly, and with 60 ° of angles of flame chamber 11 inwalls formation.Fire jetting hole 17 is evenly distributed in around the opening 16.

The upper end of insulated ceramic core 2 is tapered from top to bottom, tapered, inner fixed installation central electrode 7, central electrode 7 is made by the nickel alloy that contains copper and chromium, be drawn into cylinder form, the upper end of central electrode 7 extends out from the taper upper end of insulated ceramic core 2, forms a discharge terminal 71.

Circular grounding electrode 12 is separated into flame chamber 11

flame epicoele

111 and 112 two chambers of flame cavity of resorption that are interconnected, insert in the flame cavity of resorption 112 the taper upper end of insulated ceramic core 2, as shown in Figure 2, the terminal 71 concentric ring hearts that are positioned at grounding electrode 12 discharge, discharge terminal 71 and grounding electrode 12 are spaced from each other, and form a circular discharging gap 13 between the two.

Insulated ceramic core 2 is made by the pottery with high thermal conductivity, and its latter half is stretched out outside the shell 1, is beneficial to heat radiation.Insulated ceramic core 2 inside are fixedly installed central electrode 7, resistance material 3 and metal screw 4 from top to bottom successively, and the three is electric connection successively.The lower end of metal screw 4 extends out from the lower end of insulated ceramic core 2, and Passscheiben 5 fixedly mounts the terminal 6 of a metal material again, in order to be connected in a usual manner the ignition system of automobile.

The fuel-air mixed gas body is compressed into flame chamber 11 in use, lights and burns by the electric spark of discharge between grounding electrode 12 and the discharge terminal 71.Because flame chamber 11 has the opening 16 of a gathering, and has fire jetting hole 17 on the opening 16, so it is more strong and powerful to light the flame of ejection, and the fire jetting hole 17 around the opening 16 is so that the scope of flame ejection is larger, thereby so that igniting is more efficient.Fire jetting hole 17 is inclined upwardly, and is conducive to the flame ejection, further strengthens ignition effectiveness.

Claims

1. an improved spark plug comprises shell (1) and is fixedly installed in the interior insulated ceramic core (2) of shell (1); Central electrode (3) is housed in the described insulated ceramic core (2); The upper end of described central electrode (3) is stretched out insulated ceramic core (2) and is formed a discharge terminal (71); It is characterized in that: described discharge terminal (71) is in the flame chamber (11); Be provided with the grounding electrode (12) that approaches discharge terminal (71) in the described flame chamber (11); Described shell (1) has a flame chamber (11); Described flame chamber (11) has an opening that closes up gradually (16); Be provided with the inside and outside fire jetting hole (17) of UNICOM flame chamber (11) around the described opening (16).

2. a kind of improved spark plug according to claim 1 is characterized in that: described flame chamber (11) is inner to be circular cylindrical cavity, and opening (16) draws in gradually from the inside to the outside and is frusto-conical; Described fire jetting hole (17) is evenly distributed on opening (16) circumference.

3. a kind of improved spark plug according to claim 2, it is characterized in that: described fire jetting hole (17) is perpendicular to flame chamber (11) inwall.

4. a kind of improved spark plug according to claim 3, it is characterized in that: described fire jetting hole (17) is inclined upwardly and is 60 ° of angles with flame chamber (11) inwall.