KR200203463Y1 - Injector in direct injection engine - Google Patents

Abstract

The present invention provides a guide plate in an injector of a combustion chamber in which a bowl for dividing an intake port and an exhaust port side is formed on an upper surface of a piston head, so that fuel injected from the injector forms a tumble in the bowl on the intake port side. It is an injector of a direct injection engine that is guided to the side and can increase fuel mixing efficiency in a combustion chamber.

Description

Injector in direct injection engine

The present invention relates to an injector of a direct injection engine, and more particularly, by installing a guide plate in an injector of a combustion chamber in which a bowl is formed on the upper surface of a piston head to divide an intake port and an exhaust port side. It is an injector of a direct injection engine that improves the efficiency of mixing fuel in the combustion chamber by injecting fuel injected into the tumble plug into the bowl on the intake port side.

In general, an engine of a vehicle converts a reciprocating motion of a piston generated by compression, ignition, and explosion into a rotational motion and transmits the rotational motion to a driving wheel to generate propulsion of the car. will be.

The engine is largely comprised of a cylinder block having a cylinder to which the piston reciprocates, and a cylinder head installed at an upper end of the cylinder block to form a combustion chamber together with the piston and the cylinder block, and the combustion chamber of the cylinder head has an ignition for igniting a mixer. Plug, intake valve and exhaust valve are installed. The mixer sucked into the combustion chamber is supplied with air and fuel injected from the injector from within the intake port.

Recently, the engine of a vehicle has been developed in which a direct injection method of directly injecting fuel in a combustion chamber is different from a method of injecting fuel from an intake port, and the conventional direct injection engine is shown in FIG. Briefly, they are as follows.

As shown, each of the bowls 12 and 13 is formed by dividing the intake port side and the exhaust port side on the upper surface of the piston head 111 installed in the cylinder block 110, and the piston head ( An injector 122 is provided in the combustion chamber 121 of the cylinder head 120 formed together with each of the bowls 12 and 13 and the cylinder block 110 of the 111. Accordingly, the fuel from the injector 122 is injected directly to the bowls 12 and 13 provided in the piston head 111, that is, the uneven portion. At this time, the injected fuel is directed to the air sucked from the intake porter to form a vortex, and when the piston head 111 is close to the top dead center, there is a squish part, which causes a strong vortex at the end of the compression stroke. .

However, the injector 122 installed in the combustion chamber 121 is as shown in FIG. Since the fuel is radially injected from the injection hole 122a having a plurality of injection holes, the injected fuel causes the intake valve 124 and the exhaust valve 125 in the combustion chamber 121 to collide with each other. Because of the planar mixing with the air sucked from, it was difficult to expect a smooth fuel mixing efficiency.

Therefore, the present invention has been devised in view of the above-described conventional problems, and the fuel injected from the injector is guided to the spark plug side while forming a tumble in the bowl on the intake port side so as to increase the mixing efficiency of the fuel in the combustion chamber. It provides an injector of the direct injection engine to improve the combustion efficiency.

1 is a cross-sectional view showing a conventional direct injection engine.

2 is a side view showing an injector of a conventional direct injection engine.

3 is a cross-sectional view showing a direct injection engine according to an embodiment of the present invention.

4 is a side view showing an injector of a direct injection engine according to an embodiment of the present invention.

5 is an enlarged view of portion A of FIG.

* Explanation of symbols for main parts of the drawings

10 cylinder block 11: piston head

12,13 bowl 20 cylinder head

21: combustion chamber 22: injector

22a: injection hole 22b: guide plate

According to a feature of the present invention for achieving the above object, a bowl for dividing the intake port and the exhaust port side is formed on the upper surface of the piston head to form a cylinder block and the cylinder head and the combustion chamber and to provide fuel to the combustion chamber In the direct injection chamber engine injecting the injector is installed to the intake valve side, it is installed to extend in the longitudinal direction with a predetermined width on one side of the injection port of the injector to inject the fuel injected from the injection port of the bowl of the intake port side An injector in a direct injection engine comprising a guide plate guiding to the surface is provided.

Hereinafter, an embodiment of the present invention will be described in more detail based on the accompanying drawings.

The direct injection engine according to the embodiment of the present invention has been described by applying a conventional direct injection engine as shown in FIGS. 3 and 4, and an intake port and an exhaust port are provided on the upper surface of the piston head 11. Bowls 12 and 13 which divide the port side are respectively formed to form a cylinder block 10, a cylinder head 20 and a combustion chamber 21, and an injector 22 for injecting fuel from the combustion chamber 21. ) Is installed to the intake valve 24 side.

As shown in FIGS. 4 and 5, the injector 22 has a guide plate 22b for guiding fuel injected from the injection port 22a only to the bowl 12 on the intake port side. It is to be installed on one side of the basic features of the technical configuration.

In the figure, reference numeral 25 denotes an exhaust valve, and 26 denotes a spark plug.

According to the present invention constituted as described above, the fuel injected from the injection port 22a of the injector 22 is radially injected into the combustion chamber 21 at the time of injection. At this time, a part of the fuel is directly injected into the bowl 12 of the piston head 11 on the intake port side, and the other part, that is, the fuel injected to the exhaust port side, is a guard plate 22b provided on the exhaust port side of the injection port 22a. By being blocked by) is reflected to the bowl 12 of the intake port side.

Accordingly, all the fuel injected from the injection port 22a of the injector 22 is injected into the bowl 12 of the piston head 11 on the intake port side, causing a tumble along the bowl 12, and the combustion chamber 21 ) Is directed to the spark plug 26 installed at the upper center.

Therefore, the present invention prevents the fuel injected from the injector 22 from colliding with the intake valve 24 and the exhaust valve 25 in the combustion chamber 21 by the guide plate 22b while preventing all fuel from tumble. As a result, the efficiency of mixing with the air sucked from the intake port is increased due to the ignition plug 26.

As described above, the present invention can be introduced into the spark plug shaft while the fuel injected from the injector tumbles the bowl on the intake port side can increase the mixing efficiency of the fuel in the combustion chamber.

Accordingly, the present invention can improve the combustion efficiency and consequently increase the engine power.

Although the present invention has been shown and described in connection with specific embodiments. It will be readily apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention as indicated by the appended claims.

Claims (1)

Bowls 12 and 13 for dividing the intake port and exhaust port sides are formed on the upper surface of the piston head 11 to form the cylinder block 110, the cylinder head 20, and the combustion chamber 21, respectively. In a direct injection chamber engine in which an injector 22 for injecting fuel to 21 is installed toward an intake valve 24 side, the injector 22 has a predetermined width at one side of an injection port 22a of the injector 22 in a longitudinal direction. And a guide plate (22b) installed so as to extend toward the surface of the injection port (22a) to guide the fuel injected from the injection port (22a) to the surface of the bowl (12) on the intake port side.