JPH06208880A - Quick-burning device of spark plug for internal combustion engine - Google Patents

Abstract

PURPOSE:To obtain the spreading gas repulsion by a spark generation side inclined surface and the surface of a center electrode simultaneously with the spreading gas swelling action in a piston side inclined surface, and to shorten the burning time of the mixture gas, and to thin the mixture gas easily. CONSTITUTION:A gas hole 8 is opened in a small diameter side of a grounding electrode 6 opposite to the tip of a center electrode 4, and a piston side inclined surface 10 and a spark generation side inclined surface 6 are formed on the inner and outer peripheral surfaces of the grounding electrode 6 in the periphery of the gas hole 8. A small diameter side of the grounding electrode 6 is formed into a steep slope and a large diameter side thereof is formed into a gentle slope.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine, such as an automobile, for use with an internal combustion engine, and more particularly to a rapid combustion device for an internal combustion engine ignition plug, which is provided with a combustion device to improve a combustion speed to obtain a fuel saving effect. It is a thing.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Publication No. 3-3809, US Pat. No. 1390014, and US Pat.
As shown in the specification, the tip of the fixed body of the spark plug to be inserted into the cylinder is closed in a bag shape to form a ground electrode, and the center electrode tip is penetrated through an opening at the center of the ground electrode to form a ground electrode opening. There has been a technique of forming a spark gap between the peripheral sides of the center electrode.

[0003]

In the above-mentioned prior art, the spark gap cannot be corrected except to replace at least one of the center electrode and the ground electrode, the spark gap adjustment is troublesome, and a defect occurs during manufacturing. In addition to requiring easy and high-precision processing, combustion residues such as carbon easily accumulate in the bag-shaped space formed on the base electrode proximal end side of the ground electrode, and the combustion residues can be easily removed. Since it is not a structure, there are functional and structural problems such as the occurrence of a problem that reduces the electrical insulation.

[0004]

However, according to the present invention, a hollow truncated cone-shaped ground electrode is provided on the tip side of the extension line of the center electrode of the center electrode, and the ground electrode is provided on the small diameter side of the center electrode facing the tip of the center electrode. A gas hole is opened, a slope on the piston side and a slope on the spark generation side are formed on the inner and outer peripheral surfaces of the ground electrode around the gas hole, and the ground electrode is connected and fixed to a fixed body through a support member, and the center electrode tip portion is formed. A spark gap is formed between the gas hole and one opening edge of the gas hole, and the small diameter side of the ground electrode is formed into a steep slope, and the large diameter side of the ground electrode is formed into a gentle slope. Since the truncated cone-shaped ground electrode of is supported by the support member, it is possible to easily adjust the spark gap between the tip end face of the center electrode and the one-side opening edge of the gas hole, and the manufacturing cost is lower than that of the conventional process. Reduction and evenness of the ignition function It can be easily removed, even if combustion residue is accumulated on the base electrode side of the center electrode, it can be easily removed, and burnout deformation of the spark gap can be easily repaired to improve durability easily. . Moreover, in addition to the swelling effect of the flame spread gas on the piston side, the spark swelling side of the spark generation side and the repulsion action of the center gas on the center electrode surface can be obtained at the same time, so that the burning time of the mixed gas and the dilution of the mixed gas can be easily achieved. . Furthermore, since the flame kernel formed in the spark gap repels the tip surface of the center electrode, the rate of flame kernel spreading in the gas hole direction is significantly accelerated, and secondary combustion is performed by the enhanced flame kernel. On the other hand, the small diameter side of the ground electrode is formed into a steep slope and the large diameter side of the ground electrode is formed into a gentle slope so that the mixture volume around the gas hole is small on the small diameter side of the ground electrode. The combustion of this part can be performed in an extremely short time, and the combustion speed of the gas that spreads to the piston side can be rapidly accelerated, and the high pressure spread gas that has burned and expanded is rapidly diffused at a wide angle on the large diameter side. Therefore, it is possible to easily shorten the combustion time and improve the combustion efficiency as compared with the conventional case.

In addition, a long gas reservoir step having an end connected to the other end of the support member that connects one end to the fixed body, a spark generation side slope, and a piston side slope are provided on the ground electrode. , A spark gap is formed by making the opening edge of the gas hole opening in the gas reservoir step face the center electrode tip surface,
Further, each of the slopes is formed by a semi-circular portion provided on the long side edge of the gas reservoir step portion of the ground electrode, and the pair of semi-circular portions of the ground electrode are further curved in a direction gradually separated from the center electrode axis. The slope on the spark generation side is concave and the slope on the piston side is convex, and the flame kernel in the spark gap burns a small volume of mixed gas in the gas reservoir step early through the gas holes to create a spark gap. And, since the fire spread gas from the gas pool step portion is radially bulged in a fan shape from the edge of the semicircular portion of each of the slopes, the flame core can be amplified and diffused and bulged in a wide range by the gas pool step portion, and the flame kernel is formed. It is possible to remarkably accelerate the initial fire spread rate as a pilot fire and easily enhance the fire spread power, and also to correct the spark gap and the support angle of the gas reservoir step by bending the pillar members. It can be easily performed, and in addition to the swelling of the burning gas on the piston side, the swelling side of the spark generation side and the surface of the center electrode can repel the burning gas at the same time, which shortens the combustion time of the mixed gas and dilutes the mixed gas. In addition, the ventilation of the slope on the spark generation side can be improved to prevent non-combustible gas or combustion residues from accumulating and adhering, improving durability and ignition function, and simplifying the ground electrode shape. On the other hand, since each of the slopes is an uneven curved surface, good repulsion of the fire spread gas can be obtained, and the fire spread gas that becomes a turbulent flow toward the spark generation side and the piston side is expanded, and It can be easily improved.

[0006] In addition, a long gas reservoir step having an end connected to the other end of the support member that connects one end to the fixed body, a spark generation side slope, and a piston side slope are provided on the ground electrode. , A spark gap is formed by making the opening edge of the gas hole opening in the gas reservoir step face the center electrode tip surface,
Further, each of the slopes is formed by a semi-circular portion provided on the long side edge of the gas reservoir step portion of the ground electrode, and each of the inclined surfaces is formed slightly smaller than the gas hole on the small diameter side of the ground electrode, and the center electrode tip surface is formed in a shape similar thereto. It is formed by burning a small volume of mixed gas in the gas reservoir step early through the gas holes by the flame kernel of the spark gap, and the fire spread gas from the spark gap and the gas reservoir step is semicircular on each of the slopes. Because the fan-shaped radial expansion from the edge of the part, the flame core can be amplified and diffused and expanded in a wide range by the gas reservoir step, and the initial spreading speed with the flame kernel as the seed flame can be significantly accelerated to spread the burning power. Can be easily enhanced, and by bending the pillar member,
It is possible to easily modify the spark gap and the support angle of the gas reservoir step, and in addition to the swelling function of the flame on the piston side, the spark repulsion effect of the spark generation side slope and the center electrode surface can be obtained at the same time. Therefore, it is possible to easily shorten the combustion time of the mixed gas and to dilute the mixed gas, and also to improve the air permeability of the slope on the spark generation side to prevent the accumulation and adhesion of non-combustible gas or combustion residues, and durability. While improving the ignition function and simplifying the shape of the ground electrode, the center electrode tip surface is formed to be slightly smaller than the gas hole on the small diameter side of the ground electrode and to have a shape similar to that of the gas hole. A flame can be formed by constantly generating a spark within the range of the one side opening of the gas hole facing the, and the flame nucleus forming position and the one side opening of the gas hole are always as short as possible. Those capable of contact.

In a fast burning device for an ignition plug for an internal combustion engine in which a center electrode and a ground electrode are provided in a pair to form a spark gap, a support member for supporting the ground electrode is formed in a flat plate shape, and the support member is formed by twisting. The flame spread gas can be turbulently bulged at an early stage by the twisted portion of the strut member, and the combustion time can be shortened and the non-combustible gas can be prevented from remaining.

Further, in a rapid burning device for an ignition plug for an internal combustion engine in which a center electrode and a ground electrode are provided opposite to each other to form a spark gap, a middle portion of a pillar member supporting the ground electrode is bent to form a strut member. It is possible to adjust the spark gap by moving the ground electrode substantially in parallel on the center electrode axis line only by bending and extending the bent portion.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a sectional view of a main part, FIG. 2 is an overall view, and FIG. 3 is A of FIG.
FIG. 2 is a view as seen from the line A, which is a fixed body (1) made of a conductive metal screwed and fixed to an engine block of an internal combustion engine, and the fixed body (1).
And a ceramic electrical insulator (2) for embedding and supporting the intermediate portion. The center electrode (4) connecting the terminal (3) to one end is fixedly supported on the insulator (2), and
A ground electrode (6) is integrally fixed to the engine insertion end of the fixed body (1) through a column member (5).

The ground electrode (6) is formed in a hollow truncated cone shape, and the ground electrode (6) is opposed to the tip of the extension line of the center axis of the center electrode (4), and the ground electrode (6) is formed. The spark gap (7) is formed by bringing the small diameter side of the above into close proximity to the tip of the center electrode.

Furthermore, the small-diameter side of the hollow truncated cone-shaped ground electrode (6) is used as a steep slope, and the ground electrode (6) is also provided.
The large-diameter side of is a gently inclined surface, and the ground electrode (6) is formed in a trumpet shape. Then, a gas hole (8) is opened on the small-diameter side end surface of the ground electrode (6), and a concave spark generation side slope (9) is formed around the gas hole (8) on the spark generation side of the ground electrode (6). Also, convex piston-side slopes (10) are formed on the piston side of the electrodes (6), respectively.

Further, a gas reservoir step (11) is formed at the piston-side opening edge of the gas hole (8) in a direction substantially perpendicular to the piston-side inclined surface (10), and the column member (5) is flat. Four pillar members (5) formed in a shape and connecting one end to the large-diameter side edge of the ground electrode (6) at equal intervals.
By twisting the same at the same angle in the same direction and inclining the inner surface of the strut member (5) opposed to the initiation point between the center electrode (4) and the gas hole (8) to ignite at that initiation point. The strut members (5) diffuse the burned and expanded fire-spreading gas in a spiral shape to increase the gas fire-spreading rate by the turbulent action of the fire-spreading gas and at the same time obtain a uniform gas-spread.

Further, one end of the support member (5) is integrally fixed to the engine insertion end surface of the fixed body (1), and the large diameter side outer shape of the ground electrode (6) is substantially the same as the engine insertion end surface of the fixed body (1). The support member (5) is formed in the same size, and the middle portion of the support member (5) is bent to project the bent portion (12) toward the center electrode (4), and the bent portion (12) is expanded and contracted. By changing the length of the supporting member (5), the gas holes (8) are changed.
A spark that is formed between the center electrode (4) and the center electrode (4) without moving the ground electrode (6) without changing the mounting angle of the ground electrode (6). It is configured to adjust and set the gap (7).

Next, the center of the gas hole (8) of the ground electrode (6) is positioned on the axial extension line of the center electrode (4), and the shape is slightly smaller than the gas hole (8) and similar to this. The tip surface of the center electrode (4) is formed, and a spark is generated cylindrically between the opening edge of the gas hole (8) and the outer peripheral edge of the tip surface of the center electrode (4), and the spark of the gas hole (8) is formed. By constantly generating sparks within the opening range, ignition / spreading on the piston side of the ground electrode (6) can be performed in the shortest distance via the gas holes (8).

The present invention is constructed as described above, and by attaching the fixed body (1) to the engine and energizing the terminal (3), the spark gap () between the center electrode (4) and the ground electrode (6) is Spark is generated in 7),
The air-fuel mixture supplied to the cylinder of the engine is compressed by the piston, and immediately before the top dead center of the piston, the center electrode (4)
When energized, a spark is generated between the tip surface of the center electrode (4) and the opening of the gas hole (8) of the ground electrode (6), and the air-fuel mixture is ignited. The piston is pushed back. On the small diameter side of the steep slope of the ground electrode (6) ignited from the gas hole (8), the mixture gas has a small volume so that the gas spreads quickly and expands to a high pressure, so the spread gas is the slope of the ground electrode (6) on the piston side. Limited to (10), the high pressure acts as an accelerating force of the flame spread gas and spreads and projects toward the piston side, reaches the large diameter side of the gently sloping surface, rapidly diffuses to the piston side and its surroundings, and mixes in the cylinder. It is possible to obtain a quick combustion of qi. In addition, the gas that spreads along the spark generation side slope (9) also burns and expands, and the high pressure generated by it repels the spark generation side slope (9) to generate turbulent flow around it, and at the same time, the column member (5). By this guide, the flame spread gas becomes a turbulent turbulent flow, which is effective for early combustion of the air-fuel mixture in the cylinder. In the internal combustion engine, the early combustion of the air-fuel mixture in the cylinder is powered up as it is, and the fuel saving effect can be obtained. The turbulent flow of the burning gas is the most necessary element to obtain the early combustion. Spark generation side slope (9) provided on the ground electrode (6) formed in the shape of a hollow truncated cone.
And the function of the piston side ramp (10) is to fulfill that requirement.

Particularly, compared with the prior art, the spark generation side slope (9) and the piston side slope (10) of the ground electrode (6) discharge the fire spread gas uniformly in the direction of about 360 ° on the piston side and its periphery. The ability to prematurely burn a cylinder mixture is a major feature.

Further, FIGS. 4 to 6 show the column member (5).
As shown in FIG. 4, one pillar member (5) supports the ground electrode (6) to improve the spread gas diffusion efficiency by the spark generation side slope (9). be able to. Further, as shown in FIG. 5, the two pole members (5) and (5) support the ground electrode (6), so that the ground electrode (6) can be accurately placed in the optimum posture on the extension line of the center axis of the center electrode (4). Can be supported by the ground electrode (6)
Spark gap (7) without changing the mounting angle of
Can be adjusted. Further, as shown in FIG. 6, by supporting the ground electrode (6) by the three pillar members (5) provided at equal intervals, it is possible to improve the diffusion efficiency of the fire spread gas by the spark generation side slope (9). , Support member (5) ...
The turbulent action of the fire spread gas can be sufficiently obtained.

Further, FIG. 7 shows a modified example of the center electrode (4) and the ground electrode (6), in which a cylindrical head (4a) having a diameter slightly smaller than that of a true circular gas hole (8) is centered. The spark gap (7) is provided between the tip of the cylindrical head (4a) and the opening edge of the gas hole (8) provided at the tip of the electrode (4), and the concave spark generation side slope (9) shown in FIG. ) And a convex piston-side slope (10),
Each of the slopes (9) and (10) is formed to be flat, the volume of the air-fuel mixture surrounded by the piston-side slope (10) is formed to be large, and the gas spread rate on the piston-side slope (10) is proportionally changed.

Further, FIGS. 8 to 10 show a modified example having the same structure and operation as the above-mentioned embodiment, in which the gas reservoir step portion (11) of the ground electrode (6) is extended to both left and right edges, Column members (5) (5) at the left and right ends of the step (11)
And the spark generation side slope (9) and the piston side slope (10) are formed on the long side edge of the stepped part (11), and the piston side sloped surface (10) is the gas reservoir stepped part (11). )
The edge is formed in a semi-circular shape with a steep slope and a gentle slope. Further, it is slightly smaller than the outer shape of the engine insertion end surface of the fixed body (1) and slightly larger than the inner hole of the end surface thereof to form the plane outer diameter of the ground electrode (6) and the longitudinal direction of the step portion (11). The gas hole (8) is formed in a long oval shape, and the tip end surface of the center electrode (4) is formed in an oval shape slightly smaller than the gas hole (8).

Thus, due to the spark between the tip end face of the center electrode (4) and the opening edge of the gas hole (8), the air-fuel mixture in the gas reservoir step (11) is at the shortest distance through the gas hole (8). Ignition causes fire to spread. Since the air-fuel mixture in the step portion (11) has a small volume, it burns quickly, and the gas that has burned and expanded using this as an initiation point is restricted to the piston-side slope (10) and has a high pressure.
This acts as an accelerating force of the flame spread gas, and rapidly spreads to both sides along the gas reservoir step (11) with the piston side and spreads the flame. On the other hand, the gas that is guided and spread by the piston-side slope (10) spreads rapidly to the gentle slope and diffuses to the surroundings according to the shape of the edge of the piston-side slope (10) that is formed in a semicircle, and It is possible to burn the air-fuel mixture at a high speed over a wide range while spreading the fire to both sides of the stagnant step portion (11).

Further, the high pressure generated by the combustion and expansion of the gas which is ignited and spreads along the spark generation side slope (9) is strongly repelled according to the angle of the spark generation side slope (9) in contact therewith. It diffuses and causes a turbulent flow of the flame spread gas on both sides.

Further, FIGS. 11 and 12 show another embodiment. In the embodiment of FIG. 9, the gas reservoir step portion (11) is shown.
The spark generation side slopes (9) were formed in a concave shape and the piston side slopes (10) were formed in a convex shape on both sides of the slopes (9) (1) instead of this.
0) is made flat and its end in the piston direction is formed in a semi-circular shape, and a long cylindrical head (4a) whose tip surface is slightly smaller than that of the oblong gas hole (8) is formed as shown in FIG. It is provided at the tip of the center electrode (4). In the manufacture of this ground electrode, the slope on the spark generation side and the slope on the piston side are flat, and the processing is mainly a bending work, and mass production can be easily performed.

Table 1 below shows the results of test runs using the prototypes having the structures shown in the examples of FIGS. 11 and 12.

[0024]

[Table 1]

Conditions for test run Test run test car: ordinary freight car (1300 cc, 4 cycles, 4
Cylinder) Trial run area: Almost the same course in the urban area of Osaka Loading state of test vehicle ... Empty speed of trial run: Max 60KM / H (average 40 50KM / H) Adjustment during trial run ... Adjustment of ignition timing, adjustment of fuel supply measurement method ... Fuel After filling the tank with a full tank, measure the number of kilometers traveled and the amount of replenishment for reducing the tank, and calculate the number of kilometers traveled per liter.

FIGS. 13 to 15 show a variation of the embodiment shown in FIGS. 11 and 12, and FIGS.
In Fig. 3, the slopes (9) (10) of the ground electrode (4) are formed flat, but the edges of both slopes (9) (10) symmetrically provided on both sides of the gas reservoir step (11). The central portion is extruded and curved to the spark generation side, and the spark generation side slope (9) is formed into a spherical convex shape, whereby both side slope ends of the piston side slope (10) of the ground electrode (4) are formed. The volume of the air-fuel mixture between the edges is increased, and the high pressure generated due to the combustion and expansion of the gas that spreads along the spark generation side slope (9) depends on the angle of the spherical convex surface of the spark generation side slope (9). While strongly repulsing and diffusing radially, the central portion of the edge of the slopes (9) and (10) is extruded toward the spark generation side and curvedly formed, so that the fire spread gas is formed at the angle of the spark generation side slope (9). In response, the direction of repulsion is further expanded At the same time it is possible to increase the effect of the flow, the gas flame propagation speed in the piston side direction as it is capable of further accelerated.

[0027]

As is apparent from the above embodiments, according to the present invention, a hollow truncated cone-shaped ground electrode (6) is provided on the tip side of the extension line of the center electrode (4) so that the center electrode (4 )
A gas hole (8) is formed on the small diameter side of the ground electrode (6) facing the tip, and a piston side slope (10) and a spark generation side slope are formed on the inner and outer peripheral surfaces of the ground electrode (6) around the gas hole (8). (9) and the ground electrode (6)
Is fixed to the fixed body (1) through a column member (5), and a spark gap (7) is formed between the tip of the center electrode (4) and one side opening edge of the gas hole (8). Further, the small diameter side of the ground electrode (6) is formed into a steeply inclined surface, and the large diameter side of the ground electrode (6) is formed into a gently inclined surface. Since it is supported by the member (5), the spark gap (7) between the tip end face of the center electrode (4) and the one side opening edge of the gas hole (8) can be easily adjusted, and the accuracy is lower than that of the prior art. The manufacturing cost can be reduced and the ignition function can be made uniform by the processing of No. 1, and even if the combustion residue is accumulated on the proximal end side of the center electrode (4), it can be easily removed, and the spark gap (7 ) Burnout deformation can be easily repaired and durability can be easily improved. . Moreover, the slope on the piston side (1
In addition to the swelling effect of the burning gas of 0), the repulsion of the burning gas by the surface (9) of the spark generation side and the surface of the center electrode (4) can be obtained at the same time. It can be easily achieved. Further, the flame kernel formed in the spark gap (7) repels the tip surface of the center electrode (4), so that the flame kernel that spreads in the gas hole (8) direction is significantly accelerated and is enhanced. While the secondary combustion can be performed by the flame kernel, the small diameter side of the ground electrode (6) is formed into a steep slope and the large diameter side of the ground electrode (6) is formed into a gentle slope, thereby grounding. By making the amount of air-fuel mixture around the gas hole (8) small on the small diameter side of the electrode (6), the combustion of the portion can be performed in an extremely short time and the combustion speed of the gas spread to the piston side can be rapidly accelerated. At the same time, the combustion-expanded high-pressure fire spread gas can be rapidly diffused at a wide angle on the large diameter side, and it is possible to easily shorten the combustion time and improve the combustion efficiency as compared with the conventional case. It is a thing.

Further, a column member (5) for connecting one end to the fixed body (1), a long gas reservoir step portion (11) having an end portion connected to the other end side, and a spark generation side slope (9). , The piston side slope (10) is provided on the ground electrode (6),
A spark gap (7) is formed by making the opening edge of the gas hole (8) opening in the gas reservoir step portion (11) face the tip surface of the center electrode (4), and the gas reservoir step of the ground electrode (6). Each of the slopes (9) and (10) is formed by a semi-circular portion provided on the long side edge of the portion (11), and a pair of semi-circular portions of the ground electrode (6) is further formed with respect to the center axis of the center electrode (4). The slopes (9) of the spark generation side are made concave and the slopes (10) of the piston side are made convex so that the gas holes (8) are formed by the flame kernel of the spark gap (7). The small volume of mixed gas in the gas reservoir step portion (11) is burned early through the spark gap (7) and the fire spread gas from the gas reservoir step portion (11) is transferred to the slopes (9).
Since the fan-shaped radial expansion of the semi-circular portion edge of (10), the flame core can be amplified and diffused and expanded in a wide range by the gas reservoir step (11), and the flame kernel is used as a pilot flame. It is possible to remarkably accelerate the fire spread rate and to easily enhance the fire spread power, and to correct the spark gap (7) and the gas reservoir step (11) by bending the pillar member (5). The support angle can be easily corrected, and in addition to the swelling gas swelling effect on the piston side slope (10), the spark generating side sloping surface (9) and the center electrode (4) surface simultaneously provide a fire spread gas repulsion effect. Therefore, it is possible to easily shorten the combustion time of the mixed gas and dilute the mixed gas, and further improve the air permeability of the slope (9) on the spark generation side to prevent non-combustible gas or combustion residue from accumulating. It can be stopped, and the durability and ignition function can be improved and the shape of the ground electrode (6) can be simplified. On the other hand, since the slopes (9) and (10) are formed into uneven curved surfaces, it is possible to prevent the spread of the burning gas. The repulsion can be satisfactorily obtained, and the spread gas that becomes a turbulent flow can be bulged toward the spark generation side and the piston side, and the rapid combustion function can be easily improved.

Further, a long gas reservoir step (11) having one end connected to the fixed body (1) and the other end connected to the other end, and a spark generation side slope (9). , The piston side slope (10) is provided on the ground electrode (6),
A spark gap (7) is formed by making the opening edge of the gas hole (8) opening in the gas reservoir step portion (11) face the tip surface of the center electrode (4), and the gas reservoir step of the ground electrode (6). Each of the slopes (9) and (10) is formed by a semicircular portion provided on the long side edge of the portion (11), and is slightly smaller than the gas hole (8) on the small diameter side of the ground electrode (6), and is similar to this. The center electrode (4) tip end surface is formed into a shape that allows the small volume of mixed gas in the gas reservoir step (11) to be burned early by the flame kernel of the spark gap (7) through the gas hole (8). The spark gap (7) and the gas pool step (1
The flame spread gas from 1) is radially swelled in a fan shape from the edge of the semi-circular portion of each of the slopes (9) and (10). Therefore, the flame core is amplified by the gas pool step (11) to diffuse and swell in a wide range. It is possible to remarkably accelerate the initial rate of fire spread using the flame kernel as a seed flame, and to easily enhance the fire spread power, and by bending the strut member (5), the spark gap ( The correction of 7) and the support angle of the gas reservoir step portion (11) can be easily performed,
Further, in addition to the bulging action of the flame spread gas on the piston side slope (10), the flame spread gas repulsion action by the spark generation side slope (9) and the surface of the center electrode (4) can be obtained at the same time. Can be easily diluted, and the breathability of the spark generation side slope (9) can be improved to prevent non-combustible gas or combustion residue from accumulating, improving durability and ignition function, and grounding. While the shape of the electrode (6) can be easily simplified, the tip end surface of the center electrode (4) is slightly smaller than the gas hole (8) on the small diameter side of the ground electrode (6) and has a similar shape. By forming it, a spark can be always generated within the range of the one side opening of the gas hole (8) facing the center electrode (4) to form a flame nucleus, and the flame nucleus forming position and the gas hole (8) side Always the shortest distance from the opening In which it can be as much as possible close.

In a fast burning device for an internal combustion engine spark plug, in which a spark gap (7) is formed by opposing a center electrode (4) and a ground electrode (6), a column member (5) supporting the ground electrode (6) is provided. ) Is a flat plate shape and the strut member (5) is twisted. The twisted portion of the strut member (5) allows the flame spread gas to turbulently bulge at an early stage, thereby shortening the combustion time and preventing unburned gas. It is possible to easily prevent the residue.

Also, in a fast burning device for an ignition plug for an internal combustion engine, in which a center electrode (4) and a ground electrode (6) are provided opposite to each other to form a spark gap (7), a column member that supports the ground electrode (6). (5) With a bent portion formed in the middle, the ground electrode (6) is moved substantially in parallel on the axis of the center electrode (4) by simply bending and extending the bent portion of the pillar member (5) to generate a spark gap (7). ) It can be adjusted.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is an overall view.

3 is a view taken along the line AA of FIG.

FIG. 4 is an explanatory diagram showing a modification of the previous figure.

FIG. 5 is an explanatory diagram of the same.

FIG. 6 is an explanatory diagram of the same.

FIG. 7 is an explanatory diagram showing a modified example of FIG.

FIG. 8 is an explanatory view of a main part showing another embodiment.

FIG. 9 is an explanatory diagram of the same.

FIG. 10 is an explanatory diagram of the same.

FIG. 11 is an explanatory diagram showing a modified example of the previous figure.

FIG. 12 is an explanatory diagram of the same.

FIG. 13 is an explanatory view showing the same modified example.

FIG. 14 is an explanatory diagram of the same.

[FIG. 15] Same description

[Explanation of symbols]

 (1) Fixed body (4) Center electrode (5) Support member (6) Ground electrode (7) Spark gap (8) Gas hole (9) Spark generation side slope (10) Piston side slope (11) Gas reservoir step

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeaki Kashihara 3-3-37-411 Nagayoshide, Hirano-ku, Osaka (72) Inventor Ryohei Kashiwara 1-85, Hoshinishicho, Sakai 302 Nishimura Building 302 (72) ) Inventor Hideaki Kashiwara 30 3-B Building No. 611 No. 30 3-151, 151 Marumachi, Mukojima 2, Fushimi-ku, Kyoto

Claims (5)

[Claims] 1. A hollow truncated cone-shaped ground electrode is provided on the tip side of the extension line of the center electrode of the center electrode, and a gas hole is opened on the small diameter side of the ground electrode facing the tip of the center electrode. A slope on the piston side and a slope on the spark generation side are formed on the inner and outer peripheral surfaces of the ground electrode, and the ground electrode is connected and fixed to a fixed body through a strut member, and the tip of the center electrode and one side opening edge of the gas hole are connected. A spark-gap device for an internal combustion engine spark plug, characterized in that a spark gap is formed between the ground electrode and the small diameter side of the ground electrode is formed into a steep slope, and the large diameter side of the ground electrode is formed into a gentle slope. . 2. A ground electrode is provided with a long gas reservoir step portion having an end portion continuously connected to the other end side of a column member that connects one end to a fixed body, a spark generation side slope surface, and a piston side slope surface. , A spark gap is formed by facing the opening edge of the gas hole opening in the gas reservoir step portion to the tip end surface of the center electrode, and each slope is formed by a semi-circular portion provided on the long side edge of the gas reservoir step portion of the ground electrode. And a pair of semi-circular portions of the ground electrode are curved in a direction that gradually separates from the center electrode axis, and the spark generation side slope is concave and the piston side slope is convex. Combustion device for spark plug for internal combustion engine. 3. A ground electrode is provided with a long gas reservoir step portion whose end portion is connected to the other end side of a column member that connects one end to a fixed body, a spark generation side slope surface, and a piston side slope surface. , A spark gap is formed by facing the opening edge of the gas hole opening in the gas reservoir step portion to the tip end surface of the center electrode, and each slope is formed by a semi-circular portion provided on the long side edge of the gas reservoir step portion of the ground electrode. A fast-burning device for an internal combustion engine spark plug, characterized in that the center electrode tip surface is formed in a similar shape to the gas holes on the small diameter side of the ground electrode. 4. In a rapid burning device for an ignition plug for an internal combustion engine, wherein a spark gap is formed by opposing a center electrode and a ground electrode to each other, a supporting member supporting the ground electrode is formed into a flat plate shape, and the supporting member is twisted and formed. A quick burning device for an ignition plug for an internal combustion engine, which is characterized in that: 5. An internal combustion engine ignition plug fast-combustion device in which a center electrode and a ground electrode are provided in opposed relation to each other to form a spark gap, wherein an intermediate portion of a pillar member supporting the ground electrode is bent and formed. Fast-burning device for engine spark plugs.