KR19980036750A - Surge tank with double space - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surge tank of a fuel injection engine, the surge tank having a double space so that the distribution of blow-by gas and vaporized fuel can be improved. An upper space to which pipes to be attached are attached in parallel; A blow-by which is connected to the pipe into which the blow-by gas and the vaporized fuel is introduced, and includes a lower space connected to the pipe through a hole having a small diameter, and is introduced into the lower space according to the negative pressure by the air velocity through the pipe Gas and vaporized fuel is characterized in that it enters the pipe through the hole.

Description

Surge tank with double space

1 is a perspective view of a conventional surge tank.

2 is a perspective view of a surge tank according to the present invention.

3 is a cross-sectional view taken along the line II-II of FIG.

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

10, 20: surge tank 11, 21: body

12, 22: pipe 23: plate

24: upper space 25: lower space

25a: hole

Technical Field of the Invention

The present invention relates to a surge tank of a fuel injection engine, and more particularly to a surge tank having a double space so that the distribution of blow-by gas and vaporized fuel can be improved.

[Private Technology]

In a fuel injection engine, the surge tank is a device installed between the air cleaner and the intake manifold to eliminate the intake pulsation effect or the intake cylinder interference effect. As shown in FIG. 1, the surge tank 10 is connected to the air cleaner. On one side of the circumferential surface of the bottle-shaped body 11 having an inlet 11 ′ connected thereto, a plurality of pipes 12 connected to the intake manifold are attached in parallel. Therefore, the air passing through the air cleaner flows into the surge tank 10 through the inlet, and is then distributed to each cylinder through the pipe 12.

On the other hand, the blow-by gas refers to the gas escaping from the combustion chamber of the engine into the crankcase, and this blow-by gas causes the engine oil to deteriorate and rust the inside of the engine. Therefore, it is necessary to discharge the blow-by gas from inside the crankcase to the outside. However, if the blow-by gas is immediately discharged from the atmosphere, it causes air pollution, so it is usually introduced into the surge tank by the blow-by gas reducing device and is reduced back to the cylinder together with the air.

In addition, fuel tanks and fuel pipes generate fuel vaporized by a summer or an increase in temperature around the engine. Since such vaporized fuel cannot be injected directly from the fuel injector, it is usually introduced into the surge tank, mixed with air, and introduced into the cylinder, as in the case of blow-by gas.

[Technical problem to be achieved]

However, in the surge tank as described above, the blow-by gas and the vaporized fuel have a high temperature and therefore are collected in the upper portion of the surge tank. Therefore, there is a problem that the blow-by gas and the vaporized fuel are not evenly distributed to each cylinder according to the air velocity difference inside the surge tank.

An object of the present invention is to provide a surge tank having a double space to improve the distribution of blow-by gas and vaporized fuel.

[Configuration and Function of Invention]

In order to achieve the above object, the surge tank having a double space according to the present invention has an inlet connected to the air cleaner, the upper space is attached to the pipe connected to the intake manifold in parallel; A blow-by which is connected to the pipe into which the blow-by gas and the vaporized fuel enters, and includes a lower space connected to the pipe through a hole having a small diameter, and is introduced into the lower space according to the negative pressure by the air velocity passing through the pipe. Gas and vaporized fuel is characterized in that it enters the pipe through the hole.

EXAMPLE

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the drawings.

In figures 2 and 3 a cross section of a surge tank according to the invention is shown.

As shown in Figures 2 and 3, the surge tank 20 according to the present invention is the upper space 24 and the upper space 24 by a plate 23 protruding from one side of the inner peripheral surface of the body to the lower end of the cross section of the pipe 22 It is divided into the lower space 25.

The upper space 24 has an inlet 21 'which is connected to the air cleaner, and a pipe 22 is attached to the outer circumferential surface, and the air introduced through the air cleaner is distributed to each cylinder through the pipe 22. .

Although not shown in the drawing, the lower space 25 is connected to a pipe into which blow-by gas and vaporized fuel are introduced, and is connected to each pipe through a hole 25a having a small diameter. Accordingly, the blow-by gas and the vaporized fuel introduced into the lower space 25 are introduced into the pipe 22 through the hole 25a by the negative pressure corresponding to the speed of the air passing through the pipe 22.

[Effects of the Invention]

According to the present invention as described above, since the blow-by gas and vaporized fuel introduced into the lower space of the surge tank is introduced into the pipe through the hole by the negative pressure according to the speed of the air passing through the pipe, the blow-by gas and vaporization The distribution of the used fuel is improved.

Claims (1)

An upper space having an inlet connected to the air cleaner and to which pipes connected to the intake manifold are attached in parallel; A blow-by which is connected to the pipe into which the blow-by gas and the vaporized fuel is introduced, and includes a lower space connected to the pipe through a hole having a small diameter, and is introduced into the lower space according to the negative pressure by the air velocity passing through the pipe. A surge tank having a double space, characterized in that gas and vaporized fuel is introduced into the pipe through the hole.