KR200147468Y1 - Combustion chamber structure for an internal combustion engine - Google Patents

Abstract

At the end of the compression stroke of the piston, the combustion chamber structure of the internal combustion substrate with the squash fraction provided to maximize the vortex of the mixer and improve the engine performance and engine performance. By accumulating the stepped portion radially spaced apart in the combustion chamber with respect to, and forming the swoosh portion in an upward direction at an arbitrary inclination with respect to the water surface of the upper end of the perston, the cumulative heat funnel of the first and carbon deposits It is characterized by preventing the collision with the squash part by securing sufficient separation space with respect to, and achieving the output of the engine and the reduction of harmful exhaust gas by forming the strong turbulence.

Description

Combustion chamber structure of internal combustion board

1 is a bottom view showing the cylinder head of the internal combustion substrate according to the prior art,

2 shows a conventional combustion chamber structure, which is a cutaway sectional view taken along the line A-A of FIG.

3 is a cross-sectional view showing a combustion chamber other than the internal combustion substrate according to the present invention,

4 is a cross-sectional view showing the combustion chamber structure of the internal combustion engine according to the present invention, an enlarged portion B.

* Explanation of symbols for main parts of the drawings

9: cylinder l1A: combustion chamber

15: Piston 21: Squash

23: step

[Industrial use]

The present invention relates to a combustion chamber structure of an internal combustion engine, and more particularly, to maximize the vortex of the mixer at the end of the compression of the piston, to increase the flame propagation speed and increase the combustion height. will be.

[Prior art]

In general, the combustion efficiency in the combustion chamber in an automobile engine not only affects the output of the engine, but also affects the fuel consumption rate and the exhaust gas composition.

In other words, the aspirator inhaled through the intake system mixes and compresses the field until the end of the compression of the piston, and then explodes as the flame spreads as the first place is first ignited by the spark plug's ignition. Will be

The combustion process of the internal combustion engine is largely dependent on the composition of the mixer, the pressure and the flow and turbulent flow of the gas, and the combustion efficiency is poor. It is accompanied by problems such as occurrence.

In consideration of such a mixing ratio inside and outside the combustion chamber, a squash-type combustion chamber structure is known in the related art that can cause vortices for the flow and diffusion of the mixer at the end of the piston outside the pressure side stroke.

As a conventional official having such a squash type combustion chamber structure, a bottom view of the cylinder head CH is shown in FIG. 1, and a cutaway cross-sectional view of the A-A line of FIG. 1 is shown in FIG.

As can be seen through the drawings, a conventional combustion chamber structure is described as an example of the OOHC engine as follows. The intake valves 1 and 3 interlocked by the caps of the intake cam shafts connected to the crankshaft are installed in the intake shaft and configured to selectively introduce the common air conditioner, and the exhaust valves interlocked by the cams of the exhaust cam shafts 5 , 7) is installed in the exhaust port and is configured to discharge the exhaust gas which is combusted in the combustion chamber.

The intake valves 1 and 3 and the exhaust valves 5 and 7 are installed in the combustion chamber 11, that is, the cylinder head CH at approximately the same angle toward the center of the cylinder 9, so that the defect The inclination angle θ formed by the exhaust valves 1, 3, 5, 7 is usually in the range of 130IS.

On the other hand, in order to combust the mixer which flowed into the cylinder 9, the ignition plug 13 is normally installed in the orthogonal direction toward the center of the cylinder 91 outside in the substantially center of the combustion chamber 11 outside.

The combustion chamber 11 is provided with a squash portion 17 protruding to the four sides of the cylinder 91, which partially reduces the interval between the cylinder Hyde CH and the outside at the end of compression of the piston 15, and the corresponding portion. By forming the vortex while pushing the common part of the other part, it is provided for facilitating ignition during the stroke and increasing the propagation speed of the flame.

On the other hand, a gasket 19 for maintaining airtightness is provided between the cylinder head CH and the cylinder bore CB.

[Problem trying to solve]

On the other hand, the combustion chamber structure outside the internal combustion engine is not a staggered, but various structures that separately prepare the subcombustion chamber and the vortex chamber have been proposed, but satisfying all the main characteristics such as the output of the air, the thermal effect, the exhaust gas component, etc. Too bad frozen.

Therefore, in a conventional combustion chamber structure, it is inevitably accompanied by incomplete combustion and turbulence intensity reduction, which is adapted to increase the exhaust gas and lower fuel economy.

This is also the reason that carbon deposits accumulate on the upper side of the outer perston, which is caused by the carbon deposition and the thermal 36 windows of the perston in the conventional squishy combustion chamber structure, which causes a red snapper with the squash portion. There is this.

In addition, it is adapted to the main cause of the above-mentioned swelling temperature of the scoop shim and the upper carbon deposit 퍼 of the first, the breakage of the squash portion and the generation of the crust of the ring, thereby reducing the output of the engine as well as harmful exhaust gas components It may cause an undesirable phenomenon such as an increase of.

In view of the problems of the prior art as described above, the object of the present invention is to take into account the carbon deposits accumulated on the upper side of the Perston and the outer of the thermal furnace window, the out-of-substrate damage due to the Suzusa and the extra stone By quantifying the generation of noise, the internal combustion engine ring and the non-combustion structure are designed to realize the improvement of the engine output and the reduction of the exhaust gas components.

[Means to solve the problem]

In order to achieve the above object, the present invention includes the following means.

In other words, at the end of the piston external pressure side, at the end of the piston external pressure, the space between the cylinder head and the outside is selectively measured so as to prepare a squash to form a common vortex, but the outside of the upper surface of the squishy lipstone as an outside machine. It is formed to be inclined in the upward direction, and a space is provided so as to prevent the delamination with the carbon deposits other than the perstane.

In addition, the combustion chamber structure of the present invention extends upright of the cylinder and simultaneously forms a stepped portion radially spaced apart in the combustion chamber at the same time, thereby providing sufficient separation between the thermal window of the first case and the accumulation of carbon deposits. Doing.

EXAMPLE

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention are not described in more detail based on the attached drawings.

FIG. 3 shows the structure of the non-ring internal combustion chamber in the road valve related to the present invention, and FIG. 4 shows the main part of the present invention, and shows an enlarged portion of the third valve outside FIG.

As can be seen from the drawings, the cylinder is fixed to the duct through the gasket 19 in addition to the cylinder thrust (CB) on which a plurality of cylinders f9 through which the first 151 lifts and guides are formed. It is coupled by means (not shown).

Here, the cylinder head (CH) is provided with a riser valve, an exhaust valve, and a ignition pollug for quenching the mixer, in which the combiner is introduced, which is not known.

The combustion chamber (lIt) is provided between the first fl and the first and second flanks 15 and the cylinder fender (CHI), and the combustion chamber lIAt is provided at the end of the pressing stroke of the piston 15. The squash part 21 for inducing a mixing outside vortex is provided in the.

As shown in FIG. 1, the squash portion 21 partially and linearly protrudes in the inward direction outward from the combustion chamber lIt at the combustion chamber LIA, that is, at the bottom of the cylinder Hyde CH. .

On the other hand, in the combustion chamber (lIt), when the first case 15 is located at the top dead center, the layers with the squash portion 21 are prevented in consideration of the heat release amount of the first case 15 and the accumulation of carbon deposits. A step portion 23 is formed for this purpose.

The stepped portion 23 extends upwardly upright outside the cylinder 9 and is radially formed. The stepped portion 23 is spaced apart by an arbitrary distance from the upper end surface of the first ferrule 151.

Here, the above-mentioned arbitrary separation distance (L) is preferably in the range of, for example, 1.0mm≤L≤l.2m, which is in consideration of the thickness of the gasket 19 and the thermal fluctuation of the spreader 15 Considering the carbon deposits, it is determined to be the width of the resource limit to prevent collisions. For reference, the gasket 19 has a thickness of 1.0 to 1.3 mm.

This separation distance (L), L (1.0 to be 1.0, not enough to form a separate separation space, there is a risk of tuston 15 and extra stratospheric stone, conversely if L) 1.2mm excessive separation This makes it difficult to form the swash plate, which, of course, is accompanied by a threshold that acts even to inhibit the vortex generation effect.

In addition, the above-mentioned squash portion 21 is formed to protrude toward the rim side outside the combustion chamber 11 in succession to the stepped portion 23, which is inclined as an arbitrary inclination angle (01) with respect to the horizontal plane of the upper end portion of the Cushton 15. Formed.

Here, it is preferable to set the inclination angle α according to the characteristics of each engine, and the scratch black is entirely determined according to the exhaust valve angle and the combustion chamber wall angle. Accordingly, the inclination angle is in the range of 5 ° ≦ α ≦ 15 °, and when α <5 °, the collision effect of the present invention is insufficient, and when o :) 15, the wall surface of the combustion chamber 11 is obtained. It is similar to the angle and acts to inhibit the occurrence of the extracorporeal vortex.

The non-invented combustion chamber structure having such a configuration allows for the step of forming the stepped portion having the space between the lumps and the inclined squash to generate the vortex of the mixer, in consideration of the outer shunt and the carbon deposit. The stepped portion prevents collisions and stones by securing spaces separated from the first and second layers of the first and second layers, and acts to raise the silver box with the prevention of the layered dome.

This invention devised strong turbulence in the upper part of the center of the combustion chamber as the commons moved along the out-of-skew inclination angle of the first constitutional decompression of Perston, thereby increasing the ratio and improving fuel economy, as well as the extra-engine output due to larval ignition. You can expect an improvement.

[Effect of design]

The combustion chamber structure of the present invention having such a configuration provides a squash portion for generating a vortex of the common phase, but forms an inclined squash portion and has a step spaced so as to have a predetermined spaced space with respect to the upper surface of the Shexton. By providing this, the problem of the prior art is substantially eliminated.

In other words. According to the present invention, even if the thermal window and the carbon deposition occurs on the upper surface of the piston, it is possible to prevent the masonry in advance by securing the spaced space.

Accordingly, the internal combustion substrate of the present invention has the advantage of reducing the harmful exhaust gas along with the engine output wound caused by the rise of the mixing ratio outside the ice as well as the occurrence of noise and damage outside the swash.

In addition, the present invention is not limited to the DOHC 4 valve engine described in the previous embodiment, and can be adapted to both the SOHC and other squash combustion chamber structure.

Claims (3)

Since the piston is located at the top dead center, in the combustion chamber structure of the internal combustion engine consisting of an outer space between the upper surface of the piston and the cylinder head, the interval between the cylinder head and the cylinder head is reduced partially and selectively. A squash portion 21 is provided to form a vortex vortex by the vortex, but the squash portion 21 is inclined so as to have an outside instrument with respect to the horizontal surface of the upper end of the perth funnel 15 from the bottom surface of the cylinder hye. Arbitrary outward distance combustion chamber structure of a teyeon engine, characterized in that formed by the outer radially stepped portion (23) to extend the spaced apart upwardly upright of the cylinder (9). The combustion chamber structure of a four-combustion engine according to claim 1, wherein the ramp of the squash portion (Bl) is made in a range of 5 ° ≤α≤15 °. 2. The combustion chamber structure as set forth in claim 1, wherein the width of the stepped portion (23) satisfies a law of 1.0 mm? L?