KR19980035907U - Blow-by gas reduction device - Google Patents

Abstract

The present invention relates to a blow-by gas reducing device, the blow-by gas collecting unit 21; Intake manifold 25; A re-inlet pipe (24) for introducing the blow-by gas collected by the blow-by gas collecting unit (21) into the intake manifold (25); It is configured to include a ventilating valve 23 is installed at the inlet of the re-inlet pipe to control the flow of blow-by gas. By this invention, it is suppressed that a blow-by gas flows back to the throttle body 27, and the carbon layer by blow-by gas is prevented from being formed in a throttle valve blade.

Description

Blow-by gas reduction device

The present invention relates to a blow-by gas reducing device, and more particularly to a blow-by gas reducing device that prevents the blow-by gas is adsorbed to the throttle valve blades.

Blow-by gas is a mixed gas flowed into the crankcase from the cylinder, and when it is discharged to the outside causing air pollution, a blow-by gas reducing device which is introduced into the cylinder without being discharged to the outside is widely used.

1 and 2 show a conventional blow-by gas reducing apparatus, and as shown, a ventilation valve 3 provided with a blow-by gas collected by a blow-by gas collecting unit 1 in a cylinder head cover 2. And a structure that can be sent to the surge tank 6 through the ventilation hose 4 so that when the negative pressure is generated in the intake manifold 5, the blow-by gas is sucked into the surge tank 6 by the negative pressure and then the intake manifold is carried out. Through the fold (5) is allowed to flow back into the cylinder (not shown).

Since the configuration and operation of the blow-by gas collecting unit 1 and the ventilation valve 3 are well known, the description thereof is omitted.

Reference numeral 9 in the drawings denotes an air breather hose, and 10 denotes an air cleaner.

However, in the conventional blow-by gas reducing device as described above, the negative pressure of the intake manifold 5 suddenly rises as the opening degree of the throttle body 7 becomes 0% at the time of driving deceleration, so that a large amount of blow-by gas is stored in the surge tank. Inflow to (6). At this time, the blow-by gas flows back through the surge tank 6 to the throttle body 7 by inertia, and if this phenomenon continues, the blow-by gas may be adsorbed on the throttle valve blade 8 in the throttle body 7. As shown in Fig. 3, the throttle valve blade 8 surface layer carbon layer C is formed. This narrows the flow path and reduces the amount of air sucked in. The oxygen sensor determines the lack of oxygen, and the additional air supply is forced to operate to meet the theoretical mixing ratio. Since there is a limit, the idling state is unstable, and there is a problem such that engine stall occurs due to excessive air amount supplied by learning during deceleration during driving.

The present invention has been made to solve the above problems, and by introducing the blow-by gas into the intake manifold instead of the surge tank to prevent the blow-by gas flows back to the throttle body to form a carbon layer on the throttle valve blade There is a purpose.

1 is a plan view of a conventional blow-by gas reducing apparatus

FIG. 2 is a right side view of FIG. 1

Figure 3 is a cross-sectional view showing that the carbon layer is formed on the throttle valve blades by a conventional blow-by gas reduction device

4 is a plan view of a blow-by gas reduction apparatus according to the present invention

FIG. 5 is a right side view of FIG. 4

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

One ; Blow-by gas collection unit 2; Cylinder head cover

3; Ventilation curve 4; Ventilation Hose

5; Intake manifold 6; Surge tank

7; Throttle body 8; Throttle valve wing

C; Carbon layer

21; Blow-by gas collection unit 22; Cylinder head cover

23; Ventilation valve 24; Reflow tube

25; Intake manifold 26; Surge tank

27; Throttle body

Blow-by gas collection unit to achieve the object of the present invention as described above; Intake manifold; A re-inlet pipe for introducing the blow-by gas collected by the blow-by gas collecting unit into the intake manifold; Provided is a blow-by gas reducing apparatus installed at an inlet of the re-inlet pipe and including a ventilation valve for controlling the flow of blow-by gas.

Hereinafter, the blow-by gas reducing apparatus according to the present invention will be described in more detail with reference to the embodiment shown in the drawings.

4 and 5 show the configuration of the blow-by gas reducing apparatus according to the present invention, as shown in the blow-by gas collecting unit 21 is installed inside the engine, the intake manifold 25 is a surge tank ( 26) and the cylinder. The cylinder head cover 22 is provided with as many re-entry pipes 24 as the number of intake manifolds 25, and the other side thereof is in communication with each intake manifold 25, whereby the blow-by gas collecting unit 21 is provided. The blow-by gas collected and collected in the space under the cylinder head cover 22 can be sent to the intake manifold 25 through the reflow pipe 24.

In addition, when the negative pressure is generated in the intake manifold 25 in which the ventilation valve 23 is installed, the blow-by gas can be discharged at the inlet to which the cylinder head cover 22 and the reflow pipe 24 are connected.

Reference numeral 28 in the drawings denotes an air cleaner.

Hereinafter, the operation of the blow-by gas reducing apparatus according to the present invention having the above-described configuration will be described.

Blow-by gas generated in the engine is collected in the space under the cylinder head cover 22 by the blow-by gas collecting unit 21. The blow-by gas is introduced into the intake manifold 25 through the re-inlet pipe 24 when the negative pressure is generated in the intake manifold 25, and then flows back into the cylinder (not shown). Will be.

Therefore, even if a sudden negative pressure rise occurs, the blow-by gas is far from the throttle body 27 flowing into the intake manifold 25, so that it is difficult to flow back and is absorbed into the cylinder rather than the throttle body 27. As such, when the phenomenon in which the blow-by gas flows back toward the throttle body 27 is prevented, the blow-by gas is adsorbed on the throttle valve blade to prevent the carbon layer from being formed.

The blow-by gas reducing apparatus according to the present invention as described above includes a blow-by gas collecting unit, an intake manifold, and a re-inlet pipe and a blow-in that introduce the blow-by gas collected by the blow-by gas collecting unit into the intake manifold. It is configured to include a ventilation valve for controlling the flow of the by-gas to prevent the blow-by gas to flow back to the throttle body to prevent the phenomenon of the carbon layer caused by the blow-by gas on the throttle valve blade.

Claims (2)

A blow-by gas collecting unit installed inside the engine to collect blow-by gas that has been counted into the crankcase; An intake manifold connected to each cylinder to allow intake air into the cylinder; A re-inlet pipe connecting the blow-by gas collecting unit and the intake manifold to introduce the blow-by gas collected by the blow-by gas collecting unit into the intake manifold; The blow-by gas reducing device, characterized in that it comprises a ventilation valve installed at the inlet of the re-inlet pipe to control the flow of the blow-by gas. According to claim 1, wherein the re-inlet pipe is installed in the cylinder head cover the number of the intake manifold and the other side is in communication with each intake manifold to collect the blow-by gas collected in the inner space of the cylinder head cover, respectively Blow-by gas reduction apparatus, characterized in that to be sent to the intake manifold.