KR200166942Y1 - Blowby gas control system - Google Patents

Abstract

The present invention relates to a blow-by gas reducing device for supplying the mixed gas leaked into the crankcase through the gap between the piston and the cylinder to the combustion chamber to be reburned, and to solve the problem of a large number of parts and a complicated structure. To this end, the blow-by gas reducing apparatus of the present invention includes a gas passage 16 installed to penetrate the piston 12 to connect the crank case 15 and the combustion chamber 14, and a spring 17a inside the gas passage. The ball 17b, which is carried toward the crankcase, is disposed to close the gas passage. Therefore, the present invention has a simple configuration consisting of a gas passage, a spring, and a ball. The gas passage is opened by using a pressure difference generated between the combustion chamber and the crankcase during the intake stroke of the engine, and the blow-by gas is supplied to the combustion chamber again. do.

Description

Blow By Gas Reduction Device

The present invention relates to a blowby gas control system (blowby gas control system), and more particularly to a blow-by gas reducing device for recombustion of the mixed gas leaked into the crankcase through the gap between the piston and the cylinder to the combustion chamber.

As is well known, the gas discharged from an automobile includes an exhaust gas discharged from an exhaust pipe, a blow-by gas leaked into a crankcase of an engine, and a fuel evaporation gas evaporated from a fuel tank or a carburetor.

Here, the blow-by gas is a gas leaking into the crankcase through a gap between the piston and the cylinder, is a crankcase emission, and is a mixed gas partially oxidized with the remaining combustion gas.

Since the blow-by gas stays in the crankcase to corrode the inside of the engine and contaminate the engine oil, the blow-by gas has been released into the atmosphere in the past.

The blow-by gas reducing device having such a function is a positive crankcase ventilation (PCV) valve that opens and closes gas collected from the crank case 1 to the cylinder head cover 2 by the intake negative pressure, as shown in detail in FIG. 1. (3) and the PCV hose (4) are supplied to the intake manifold (5) of the intake machine, and are entered into the combustion chamber of each cylinder, so as to be reburned together with the new mixer.

However, the conventional blow-by gas reducing device has a large number of parts and complicated equipment, such as a blow-by gas passage in the cylinder block and the cylinder head, and the installation of a PCV valve and a PCV hose. There is a problem.

The present invention has been proposed for the purpose of solving the above-mentioned problems of the prior art, so that it is possible to simplify the recirculation path and apparatus of the blow-by gas.

1 is a block diagram showing a conventional blowby gas reducing apparatus.

2 is a cross-sectional view showing a blow-by gas reducing apparatus according to the present invention.

3 is an operating state of the blow-by gas reducing apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

11 cylinder 12 piston

13 cylinder head 14 combustion chamber

15: crank case 16: gas passage

17: check valve 17a: spring

17b: ball

As a means for realizing the above object, in the blow-by gas reducing apparatus of the present invention, a gas valve connecting a combustion chamber and a crankcase is installed through a piston, and a check valve is opened only at the intake stroke of the engine. It consists of a technical configuration to be installed.

Here, the check valve is composed of a ball which is carried toward the crankcase by a spring to close the gas passage.

According to this configuration, the constant check valve is opened due to the low pressure generated in the combustion chamber during the intake stroke of the engine and the high pressure generated in the crankcase relatively, and the blowby gas collected in the crankcase is supplied to the combustion chamber, thereby providing a new mixer. Burned with.

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

EXAMPLE

2 is a cross-sectional view showing a blowby gas reducing apparatus according to the present embodiment, and FIG. 3 is an operation state diagram of the blowby gas reducing apparatus according to the present embodiment.

In the drawings, reference numeral 11 denotes a cylinder, 12 a piston, and 13 a cylinder head.

The combustion chamber 14 is formed in the space between the head part of the piston 12 and the bottom face of the cylinder head 13, and the crank case 15 is provided in the lower part of the piston 12. As shown in FIG.

Here, in the blow-by gas reducing apparatus of this embodiment, the blow-by gas as the unburned gas leaked into the gap between the piston 12 and the cylinder 11 and collected in the crankcase 15 does not pass through a separate path. It is supplied directly through the gas passage 16 through the piston 12.

As shown in FIG. 3, the gas passage 16 is provided with a check valve 17 to be opened only at the intake stroke of the engine.

The check valve 17 is constituted by a ball 17b which is supported by the spring 17a toward the crankcase 15 and closes the gas passage 16.

Based on this configuration, in the blow-by gas reducing apparatus of the present embodiment, low pressure is formed in the combustion chamber 14 when the intake stroke of the engine, that is, the piston 12 is lowered, and relatively high pressure is formed in the crankcase 15. Due to the pressure difference, the blow 17 gas of the valve 17 opens the gas passage 16 while compressing the spring 17a, and the blow-by gas collected in the crankcase 15 through the gas passage 16. Is supplied to the combustion chamber (14).

On the other hand, the check valve 17 of the present embodiment is to maintain the state of Figure 2 during the compression, explosion, exhaust stroke of the engine.

Through the embodiments described above, it can be seen that the blowby gas reducing apparatus according to the present invention substantially solves the problems of the prior art.

That is, according to the present invention, the conventional complicated structure consisting of the cylinder block, the cylinder head, the PCV valve, and the PCV hose is removed, and the blowby gas is reduced by a simple configuration consisting of the gas passage and the check valve.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, any person having ordinary knowledge in the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Modifications may be made.

Claims (2)

A blow-by gas reducing device which leaks between a piston and a cylinder and is collected in a crankcase to be supplied to an intake machine and reburned with a new mixer, wherein the blowby gas reducing device is formed through the piston to connect the crankcase and the combustion chamber. And a check valve provided in the gas passage so as to be opened only at the intake stroke of the engine. 2. The blow-by gas reducing apparatus according to claim 1, wherein the check valve is supported by a spring toward the crankcase and closes the gas passage.