CN2073176U

CN2073176U - Fire injection chamber type spark plug

Info

Publication number: CN2073176U
Application number: CN 90214760
Authority: CN
Inventors: 申阳德
Original assignee: SCIENCE AND TECHNOLOGY BUREAU OF XIZANG AUTONOMUS REGION
Current assignee: SCIENCE AND TECHNOLOGY BUREAU OF XIZANG AUTONOMUS REGION
Priority date: 1990-07-13
Filing date: 1990-07-13
Publication date: 1991-03-13

Abstract

The utility model relates to a fire injection chamber type spark plug which belongs to the part of the gasoline engine, comprising a shell, a porcelain core, a double threaded screw with a wire-connection cap nut, the glass sealing agent of the conducting body, and a central electrode. The central electrode is arranged in the porcelain core, and the lower end of the central electrode is extended out the porcelain core. A fire injection chamber is formed between the shell and the porcelain core. The lower part of the shell is provided with a fire injection cap which seals the fire injection chamber, a ground electrode which is corresponding to the central electrode is arranged in the fire injection cap, and the ground electrode and the central electrode form a spark gap. A fire injection hole is arranged on the fire injection cap.

Description

Fire injection chamber type spark plug

The utility model relates to a kind of internal combustion engine part, particularly a kind ofly is used for petrolic fire injection chamber type spark plug.

Common spark plug can only play ignition action, produces the electric spark after-combustion and begins to propagating all around from electric spark, and propagation velocity is relevant with compression ratio, and increasing compression ratio can be accelerated flame propagation velocity, but pinking easily.Therefore common spark plug can not satisfy an urgent demand of petrol engine to current low oil consumption, low emission, high power, smooth operation.

The purpose of this utility model is to solve the above-mentioned deficiency of common spark plug, and a kind of fire injection chamber type spark plug with the jet flames combustion ignition is provided.

The utility model belongs to the improvement of common spark plug.The utility model comprises the double threaded screw of shell, the porcelain heart, band wiring nut, conductor glass-sealing agent and central electrode, central electrode is contained in porcelain in the heart, stretch out in the heart from porcelain the lower end, formed the flame chamber between the shell and the porcelain heart, the flame cap with the sealing of flame chamber is arranged at the bottom of shell, has in the flame cap and the corresponding ground electrode of central electrode, ground electrode and central electrode are formed gap, have fire jetting hole on the flame cap.

Flame cap and outer casing underpart are welded to connect in the utility model, and the taper boss is arranged in the flame cap, and the middle part of taper boss has and is the ground electrode of one with it, and the bottom of flame cap has equidistantly distributed three fire jetting holes.

The middle part of shell has and is the fin of one with it in the utility model.

The utility model is compared with existing common spark plug has following advantage: can realize reliably, evenly and promptly burn; Because the effect of umbrella spray bundle, most charges can burn faster, thereby has reduced petrolic oil consumption, has reduced exhaust pollution, has improved the heat efficiency; Simple in structure, cheap, highly versatile replaces common spark plug easily.

The structural representation of the common spark plug of Fig. 1

Fig. 2 structural representation of the present utility model

The working state figure of Fig. 3 the utility model initial shift

The working state figure of Fig. 4 the utility model second working stage

The working state figure of Fig. 5 the utility model the 3rd working stage

When Fig. 6 mist is lighted in flame chamber wall portion, the propagation figure of the utility model in cylindricality combustion chamber, garden

Fig. 7 mist when enclosure wall section is lighted, the propagation figure of common spark plug in cylindricality combustion chamber, garden

Fig. 2 has described embodiment of the present utility model.The utility model comprises shell (1), the porcelain heart (2) is arranged in the shell (1), the double threaded screw (3) of band wiring nut is housed in the porcelain heart (2), conductor glass-sealing agent (4) and central electrode (5) also are equipped with in the bottom of the double threaded screw (3) of band wiring nut in the porcelain heart (2), stretch out from the porcelain heart (2) lower end of central electrode (5), be formed with a flame chamber (6) between the shell (1) and the porcelain heart (2), the diameter of flame chamber (6) is 10mm, the degree of depth is 26mm, for considering to match with present used petrol engine, the maximum volume of flame chamber (6) is designed to about 3ml, flame cap (7) with flame chamber (6) sealing is arranged at the bottom of shell (1), flame cap (7) adopts high temperature resistant, corrosion resistant nickel, chromium, titanium sheet material, form through die casting, the external diameter of flame cap (7) is 12mm, internal diameter is 10mm, length is decided on the volume of engine chamber, flame cap (7) is welded to connect with shell (1) bottom, taper boss (8) is arranged in the flame cap (7), the middle part of taper boss (8) be formed integrally therewith and with the corresponding ground electrode of central electrode (5) (9), ground electrode (9) is formed gap (10) with central electrode (5), the gap of gap (10) is 1.2～1.3mm, if the arcing gap is not good, can adjust by the height that increases or reduce ground electrode (9).The bottom surface forging and pressing of flame cap (7) have the flame that can make ejection to be three fire jetting holes (11) at 35 ° of angles, and fire jetting hole (11) is of a size of 1.5 * 6mm, and the middle part of shell (1) also has fin formed integrally therewith (12).Calorific value of the present utility model needs the high engine of calorific value according to petrol engine design needs and definite, the length of flame cap (7) can be extended to 6～8mm place in the combustion chamber, otherwise extend to 3～5mm place.

Fig. 3, Fig. 4, Fig. 5 have described the operating state of first, second and third working stage of the utility model.The utlity model has three and connect working stage, promptly 1. are formed with the charge condition that is beneficial to igniting; 2. uniform flame chamber internal combustion rapidly; 3. main chamber burning equably rapidly,, gaseous mixture (13) among Fig. 3 in compression stroke flows into spark plug flame chamber (6), the fluctuation of its flow velocity, composition and temperature is all very little, because pass through the gaseous mixture (13) that fire jetting hole (11) flows into from different directions, make all homogenizing of its various revolving property parameters, thereby good especially ignition condition is provided.On the inwall than heat, igniting takes place in ground electrode (9) apex zone begin in flame chamber (6) among Fig. 4, burning rate is quite fast, and the interior temperature of flame chamber (6) increases suddenly, and flame is extrapolated from fire jetting hole (11).The flame front of releasing among Fig. 5 has a helical form high-speed flame forward, its speed to be directly proportional with engine speed, jet out flames with 35 ° of angle flame chambers (6) outer wall, from flame chamber (6) outer wall to the combustion chamber central burner, thereby accelerated burn rate.

Fig. 6, Fig. 7 have described mist when flame chamber (6) or enclosure wall section are lighted, the utility model and the common spark plug propagation condition in cylindricality combustion chamber, garden, the area that flame troops under one's command reach after Indoor Combustion 10ms is shaken in combustion among Fig. 6 accounts for 80% of chamber cross section, and the area that flame front troops under one's command reach behind the internal combustion 10ms of combustion chamber among Fig. 7 accounts for 10% of chamber cross section.

Claims

1, a kind of fire injection chamber type spark plug, the double threaded screw that comprises shell, the porcelain heart, band wiring nut, conductor glass-sealing agent and central electrode, central electrode is contained in porcelain in the heart, and stretch out in the heart from porcelain the lower end, it is characterized in that being formed with the flame chamber between the shell and the porcelain heart, flame cap with the sealing of flame chamber is arranged at the bottom of shell, have in the flame cap and the corresponding ground electrode of central electrode, ground electrode and central electrode are formed gap, have fire jetting hole on the flame cap.

2, fire injection chamber type spark plug according to claim 1, it is characterized in that flame cap and outer casing underpart are welded to connect, the taper boss is arranged in the flame cap, and the middle part of taper boss has and is the ground electrode of one with it, and the bottom surface of flame cap has equidistantly distributed three fire jetting holes.

3, fire injection chamber type spark plug according to claim 1 and 2, the middle part that it is characterized in that shell have and are the fin of one with it.