KR100222848B1 - The structure for generating of intake swirl in an internal combustion engine - Google Patents

Abstract

A low speed intake manifold and a high speed intake manifold connected between the surge tank and the cylinder head to direct the atmosphere to the combustion chamber so that the internal combustion engine can obtain the maximum torque and the maximum power in the entire speed section; A spark plug which is located above the combustion chamber and generates sparks according to the ignition timing to ignite the mixer, a low speed port for directing the mixer flowing through the low speed intake manifold into the combustion chamber, and the high speed intake air described above. The air flowing into the manifold is composed of a high speed port formed at the periphery of the combustion chamber to further promote swirl while flowing after the mixer introduced into the low speed port, wherein the combustion chamber includes a first swirl generating region, a second swirl generating region, An intake swirl generating structure of an internal combustion engine having a third swirl generating region.

Description

Intake swirl generation structure of internal combustion engine

1 is a side cross-sectional view of a coupling between a cylinder head and a cylinder block according to the present invention.

2 is a cross-sectional view showing a coupling state between the combustion chamber and the intake manifold according to the present invention.

2 (a) is a flow chart of the intake air in the low speed region,

2 (b) is an intake flow chart of the high speed region.

3 is a cross-sectional view showing the structure of a combustion chamber according to the present invention.

* Explanation of symbols for main parts of the drawings

4: low speed intake manifold 6: high speed intake manifold

12: low speed port 14: high speed port

16: combustion chamber 18: first swirl generating region

20: second swirl generating area 22: third swirl generating area

The present invention relates to an intake swirl generation structure of an internal combustion engine, and more particularly, to realize improved stratified combustion and early combustion, so that a large torque and output can be obtained at low and medium speeds, and a maximum torque maximum output can be obtained at a high speed. One intake swirl generation structure.

The state of intake air flowing from the internal combustion engine into the combustion chamber is known to affect the engine output, emission and fuel economy.

Since the intake air flowing into the combustion chamber can obtain a large output when the flow resistance is minimized, the structure of the intake system can be reduced in any area of the engine.

In order to increase the output of the engine, it is proposed to increase the charging efficiency of the intake air and to allow the flow of the intake air to swirl.

The swirl action of the intake air increases the power and torque of the engine at low and medium speeds, because the compression ratio can be increased and stratified combustion is possible.

In general, the engine can get a large output in a certain area, but the output is lowered in a lower or lower area.

The present invention has been invented to solve the problems of the prior art as described above, an object of the present invention is to increase the torque and output in all areas of the engine, intake swirl of the internal combustion engine that can reduce fuel consumption and the amount of emission To provide a generating structure.

In order to realize the object of the present invention as described above, a low-speed intake manifold and a high-speed intake manifold connected between the surge tank and the cylinder head to guide the atmosphere into the combustion chamber, and the ignition timing is located above the combustion chamber And a low speed port for directing the ignition plug to generate a spark and igniting the mixer, a low speed port for directing the mixer flowing through the low speed intake manifold to the combustion chamber, and a low speed port for the air flowing into the high speed intake manifold. It is composed of a high speed port formed at the periphery of the combustion chamber to further promote the swirl while flowing along the back of the introduced mixer, the combustion chamber is an internal combustion holding the first swirl generating region, the second swirl generating region, the third swirl generating region Provides an intake swirl generation structure of the engine.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a view for explaining an intake manifold according to the present invention, and has a structure in which air introduced through an air cleaner (not shown) can enter the intake manifold 2.

The intake manifold 2 of this embodiment is divided into a low speed intake manifold 4 and a high speed intake manifold 6 so that these intake manifolds can induce intake into one combustion chamber as a set. have.

The inner diameter of the low speed intake manifold 4 is larger than the inner diameter of the high speed intake manifold 6. The high speed intake manifold 6 is formed by a negative pressure of the engine or an electronic control unit (ECU). The valve means 8 which opens and closes is installed.

The valve means 8 has a structure in which the valve plate can be interlocked by a diaphragm when using a negative pressure of the engine, and can be opened and closed by a solenoid when controlled by an electronic control unit. Since it has been proposed, a detailed description thereof will be omitted.

The low speed intake manifold 4 is located above the high speed intake manifold 6 to form the low speed port 12 at a position closer to the spark plug 10 as shown in FIG. In order to install it, it is inclined toward the low speed port.

This structure is advantageous in that the mixer introduced into the low speed port 12 can be easily ignited in the atomized state.

The low speed port 12 is connected to the cylinder head 14 in a curved state with a predetermined curvature to increase the inertial effect of the intake air.

On the other hand, the high speed port 14 is connected to the combustion chamber intake manifold 6 so that the low speed port 12 is connected to the center side of the combustion chamber 16, whereas the high speed port 14 is connected to the peripheral side of the combustion chamber 16. Connected.

In this structure, as shown in FIG. 3, the length of the low-speed intake manifold 4 is longer than that of the high-speed intake manifold 6, in particular, the low-speed intake manifold has a curved shape and burns. It is designed to generate swirl for the first time when the mixer moves indoors.

The combustion chamber 16 is divided into three swirl generating regions, the first swirl generating region 18 to which the mixer introduced into the low speed port 12 is first contacted, and the mixer passing through the first swirl generating region. 2nd swirl generation area | region 20 to which is guided, and 3rd swirl generation area | region 22 with the smallest protrusion amount inside a combustion chamber is comprised.

The first swirl generating region 18 has a small projecting amount of the portion where the intake air first collides, and the left and right portions of the first swirl generating region 18 are more protruded.

The second swirl generating region 20 has a structure in which the amount of protrusion is rapidly reduced in the first swirl generating region 18.

The injector 24 for injecting fuel into the combustion chamber is provided only in the low speed intake manifold 4 to make a mixer, and only the air can flow into the high speed intake manifold 6.

In the intake swirl generation structure of the present invention thus formed, the intake air flows into the combustion chamber 16 at the negative pressure of the engine while the engine is started and the intake and exhaust valves are opened and closed by the Chem shaft.

At this time, when the engine is in the low speed region, the valve means 8 installed in the high speed intake manifold 8 blocks the conduit so that the air flowing into the combustion chamber 16 flows only through the low speed intake manifold 4.

That is, as shown in FIG. 2 (a), air flows through the low speed port 12 while the air flows through the low speed intake manifold 4, and at this time, since the low speed port is curved at a constant curvature, the air flowing therethrough Becomes directional.

By this action, the directional air enters the combustion chamber 16 while passing through the low speed intake manifold 4, and simultaneously impinges on the wall surface of the combustion chamber and along the wall surface of the combustion chamber in the second (a) degree. It flows in the arrow A direction shown.

That is, the mixer in which air and fuel are mixed flows along the first swirl generation region 18 in the direction of arrow A, flows to the second swirl generation region 20 in the direction of arrow B, and the third swirl generation region in the direction of arrow C. As it passes to (22), it rotates inside the combustion chamber.

With this action, the mixer is burned along the first swirl generating region 18, the second swirl generating region 20 and the third swirl generating region 22 while having a strong swirl flow, and thus the combustion time is increased. Will be shortened.

Therefore, as the explosion force increases, the torque increases and the engine outputs fuel efficiency, and emission emission can be reduced.

When the engine passes through the low and medium speed zones, the pipeline that is blocked by the valve means 8 installed in the high speed intake manifold 6 is opened.

As a result, as shown in the second (b), air flows in the low speed port 12 as in the low speed region, and air also flows in the high speed port 14 at the same time.

Then, the air flowing into the high speed port 14 along the mixer flowing in the directions A, B, and C along the first, second, third, and swirl generating regions 18, 20, and 22 flows along the mixer in the direction of the arrow R. Ignition causes a stratified ignition pattern around the spark plug even in the high speed region.

At this time, the air flowing into the high speed port 14 through the high speed intake manifold 6 enters the third swirl generating region 22, which is the arrow S Bangxiang in the drawing, and the swirl of the mixer introduced through the low speed port 12. In addition to the action will cause a stronger swirl.

In this state, the concentration of the mixer around the point and the plug 10 is changed in the order of rich-lean-new air-rich, so that it can cause swirl flow combustion, thereby maximizing the combustion rate.

As described above, the intake swirl generation structure according to the present invention achieves maximum torque and output by stratification ignition and short ignition time in the low and medium speed regions, and the same effect can be obtained at high speed. Performance can be maximized, thereby reducing fuel economy and reducing emissions from emissions.

Claims (4)

A low speed intake manifold and a high speed intake manifold connected between the surge tank and the cylinder head to direct air into the combustion chamber; A spark plug positioned above the combustion chamber and generating sparks according to an ignition timing to ignite the mixer; A low speed port for directing the mixer flowing to the low speed intake manifold to the combustion chamber; The air flowing into the high-speed intake manifold flows along the back of the mixer introduced into the low-speed port, and is composed of a high-speed port formed at the periphery of the combustion chamber to further promote swirl, and the combustion chamber is formed in a direction in which the intake air flows gradually. An internal combustion engine having a first swirl generating region projecting inward, a second swirl generating region rapidly decreasing from the first swirl generating region, and a third swirl generating region projecting into the combustion chamber from the second swirl generating region Intake swirl generation structure. The intake swirl generating structure of an internal combustion engine according to claim 1, wherein the low speed intake manifold is larger than the diameter of the pipeline of the low speed intake manifold. The intake swirl generation structure of an internal combustion engine according to claim 1, wherein the low-speed intake manifold is longer than the length of the high-speed intake manifold and is bent so that the intake can be directional. The intake swirl generation structure of an internal combustion engine according to claim 1, wherein the spark plug is inclined toward the low speed port side.