KR19980076158A - Stacker engine - Google Patents

Abstract

The present invention discloses a stratified charge engine. According to the present invention, an injector 5 for fuel injection is installed in an intake port 2 connected to a combustion chamber 1 equipped with a spark plug 3, and an intake valve 4 for opening and closing the inlet of the combustion chamber 1 is provided. In the engine installed in the intake port (2) in the lifting type 2, the intake port (2) is an L-shape in which the swirl phenomenon is active so that the mixer in the vicinity of the spark plug (3) has a rich layered structure It features.

Description

Stacker engine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stratified charge engines, and more particularly to engines in which the mixer is richly supplied near the spark plug for lean burn.

In general, an engine of an automobile is configured to generate power by a force in which a mixer in which air and fuel are mixed at a predetermined ratio is compressed and exploded by a piston and a spark plug in a combustion chamber. The folds are connected and an exhaust manifold for exhausting combustion gases is also connected.

On the other hand, intake and exhaust ports that connect between the intake and exhaust manifolds and the combustion chamber are formed in the cylinder head constituting the upper portion of the combustion chamber, and the intake and exhaust valves are provided in a lift type, and the intake port is fuel injection. Injectors are installed.

By the way, the conventional engine employs the over-injection method in order to prevent misfire. In other words, it is possible to prevent misfire by increasing the amount of fuel injected from the injector and forming the mixer in a very rich state. However, if the mixer is thick as described above, misfire can be prevented, but the amount of exhaust gas is excessively increased, causing environmental pollution, and fuel consumption is also reduced due to excessive consumption of fuel.

In particular, since the conventional intake port has a shape in which the intake manifold is connected almost linearly between the combustion chambers, the amount of swirl of the mixer is small so that it cannot form a layer. For this reason, in order to prevent misfire as mentioned above, it was forced to supply a rich mixer.

Therefore, the present invention has been devised to solve the problems caused by the conventional engine, and instead of supplying a lean mixer, it becomes a stratified supercharger in which a rich mixer is located near the spark plug, thereby preventing misfire and exhausting. It is an object of the present invention to provide a stratified supercharged engine capable of reducing the amount of gas emitted and improving fuel economy.

1 to 3 are cross-sectional views showing the internal structure of the stratified charge engine according to the present invention.

1 is a suction stroke initial state

2 is a suction stroke end state

3 is the compression stroke state

Figure 4 shows in detail the shroud valve which is the main part of the present invention;

* Description of the symbols for the main parts of the drawings *

1-Combustion chamber 2-Intake port

3-ignition plug 4-shroud valve

5-ignition plug 41-guide

In order to achieve the above object, the present invention, the injector for fuel injection is installed in the intake port connected to the combustion chamber having a spark plug, the intake valve for opening and closing the combustion chamber inlet is provided in the engine installed in the inlet port lift type The intake port is characterized by an L-shape in which a swirling phenomenon occurs actively so that the mixer near the spark plug has a rich layered structure.

The intake valve may be a shroud valve provided with a guide for inducing a swirl phenomenon on its outer periphery.

Preferably, the spark plug is installed in the intake port so as to be disposed in parallel with the horizontal portion of the lower end of the intake port.

According to the configuration of the present invention described above, since the intake port is L-shaped, the amount of swirl of air is increased, and the shroud valve is adopted as the intake valve, so that the amount of swirl is increased. In addition, since the spark plugs are arranged laterally, even a small amount of fuel is well mixed with the air to prevent misfire.

EXAMPLE

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

1 to 3 are cross-sectional views showing the internal structure of the stratified charge engine according to the present invention, in which FIG. 1 is an initial stage of a suction stroke, FIG. 2 is a final stage of a suction stroke, FIG. 3 is a compression stroke, and FIG. It is a figure which shows the shroud valve which is a principal part of this invention in detail.

For reference, in describing the configuration of the present embodiment, the same parts as in the prior art described at the beginning of the specification will be described mainly by omitting the repeated descriptions in order to avoid duplication of description.

As shown in FIG. 1, the intake port 2 formed in the cylinder head so as to connect between the intake manifold (not shown) and the combustion chamber 1 has an L-shape rather than a straight line as in the prior art. This is for activating a swirl phenomenon in which air descending vertically downwards hits the middle bent portion of the intake port 2 and then swirls in the horizontal lower portion.

Moreover, the intake valve which raises and closes the inlet of the combustion chamber 1 of the intake port 2 is the shroud valve 4 by which the amount of swirl increases. As shown in detail in FIG. 4, the shroud valve 4 is a valve in which a band-shaped guide 41 is fitted on the outer periphery of the face, and the swirl amount is increased by swirling the mixer along the guide 41.

The injector 5 for injecting fuel into the intake port 2 is not directed toward the inlet of the combustion chamber 1 as in the prior art, but is disposed in the intake port 2 so as to be disposed horizontally in the middle bent portion of the intake port 2. Is installed. In this case, the fuel injected from the injector 5 is not immediately supplied to the combustion chamber 1 but sufficiently mixed with air at the intake port 2, and then supplied to the combustion chamber 1. That is, since the mixing property is improved, the fuel injection amount can be reduced.

Here, reference numeral 3 denotes a spark plug provided in the cylinder head constituting the upper part of the combustion chamber 1, and 6 is a piston movably inserted in the combustion chamber 1 to compress the mixer.

Hereinafter, the operation will be described in detail with reference to FIGS. 1 to 3 of the present embodiment configured as described above.

In the beginning of the intake stroke shown in FIG. 1, only the air is supplied to the combustion chamber 1 through the intake port 2 while the shroud valve 4 descends and the combustion chamber 1 inlet slowly opens. At this time, the air is strongly swirled while hitting the L-shaped middle portion of the intake port (2), and again swirled along the guide 41 of the shroud valve (4), as shown by the arrow, the combustion chamber (1) It is strongly swirled within. In other words, the amount of swirl is greatly increased.

Then, at the end of the intake stroke, fuel is injected from the injector 5 to the intake port 2. Since the injected fuel is already in a state where the air is strongly swirled, it is swirled together while being mixed with the air, thereby forming a layered structure as shown in FIG. 2 in the combustion chamber 1. That is, the mixer in the vicinity of the spark plug 3 becomes thick, and as it goes down in the direction of the piston 6, a layer structure is formed in which the mixer becomes thinner.

Next, as shown in Fig. 3, which is a compression stroke, even when the piston 6 rises to compress the mixer, the layered structure is maintained as it is, and in the subsequent explosion stroke by the spark plug 3, Since one mixer is located near the spark plug 3, misfire can be prevented and ignition can proceed easily.

Therefore, since the mixer forms a layered structure, it is not necessary to inject a large amount of fuel, and even a small amount of the mixture prevents misfire and facilitates ignition, so that the concentration of the mixer can be made thin. Will be less.

As described above, according to the present invention, the swirl phenomenon is strongly induced, so that the layered structure having a high concentration of the mixer near the spark plug is formed in the combustion chamber, thereby making it possible to thin the mixer while preventing misfire, thereby releasing the exhaust gas. In addition, the environmental pollution caused by the exhaust gas can be reduced.

In addition, the fuel injection amount can be reduced and the fuel consumption can be reduced, thereby improving fuel economy.

On the other hand, the present invention is not limited to the above-described specific preferred embodiments, and various changes can be made by those skilled in the art without departing from the gist of the invention claimed in the claims. will be.

Claims (3)

An injector for fuel injection is installed in an intake port connected to a combustion chamber equipped with a spark plug, and an engine in which an intake valve for opening and closing the combustion chamber inlet is lifted up and down in the intake port, The intake port is an L-shaped turbocharger engine, characterized in that the L-shape in which the swirling phenomenon occurs actively so that the mixer near the spark plug has a rich layered structure. The stratified charge engine according to claim 1, wherein the intake valve is a shroud valve provided with a guide for inducing a swirl phenomenon on its outer periphery. 3. The stratified charge engine according to claim 1 or 2, wherein the spark plug is installed in the intake port so as to be disposed in parallel with a horizontal portion of the lower end of the intake port.