KR100187977B1 - Device for purifying egr gas in internal combustion engine - Google Patents

Abstract

The present invention connects a plurality of purification tubes with an air filter to the exhaust gas recirculation pipe connecting the exhaust manifold and the intake manifold to filter the harmful substances in the exhaust gas being recycled to be supplied to the intake manifold. A diesel engine recirculation exhaust gas purification device for improving the exhaust gas recirculation apparatus, comprising: an exhaust gas recirculation pipe (4) connected to recirculate the exhaust gas of the exhaust manifold (3) and the intake manifold (2); In order to prevent the fitting, durability and noise of the pipe 4, the bellows 5 installed in the middle of the exhaust gas recirculation pipe 4 and a part of the exhaust gas of the exhaust manifold 3 at the start of the engine An exhaust gas recirculation bell provided in the exhaust gas recirculation pipe 4 to open the intake manifold 2 for recirculation and to shut off when the engine 1 rises to a set temperature to exhaust the exhaust gas into the atmosphere. (6) and an air filter (8) installed in communication with the exhaust gas recirculation pipe (4) between the bellows (5) and the exhaust gas recirculation valve (6) to filter out harmful substances in the exhaust gas to be recycled. A plurality of purification pipes 7 each having a built-in) constitute a recirculation exhaust gas purification device of a diesel engine.

Description

Recirculation Exhaust Gas Purifier of Diesel Engine

1 is a block diagram of the recycle exhaust gas purification apparatus of the present invention.

2 is a block diagram of a conventional exhaust gas recirculation apparatus.

* Explanation of symbols for main parts of the drawings

1: engine 2: intake manifold

3: exhaust manifold 4: exhaust gas recirculation pipe

5: Berlows 6: Exhaust gas recirculation valve

7: Purification pipe 8: Air filter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation apparatus of a diesel engine, and more particularly, to a harmful substance in exhaust gas recycled by connecting a plurality of purification tubes having an air filter to an exhaust gas recirculation tube connecting the exhaust manifold and the intake manifold. The present invention relates to a recirculation exhaust gas purification device for a diesel engine, to improve the combustion efficiency by filtering the oil into the intake manifold.

In general, diesel engines use direct injection in order to ignite the combustion chamber because their fuel is light and volatile.

However, since the engine is cooled during the initial start-up, the exhaust gas that is not combusted is discharged into the atmosphere until it is raised to a set temperature, thereby causing a problem of polluting the air by releasing harmful substances such as hydrocarbons and nax.

Therefore, to solve this problem, as shown in FIG. 2, an exhaust gas recirculation tube 4 'connected to recycle the intake manifold 2' to the exhaust gas of the exhaust manifold 3 ', and an exhaust gas recirculation tube ( 4 '), the bellows 5' installed in the middle of the exhaust gas recirculation pipe 4 'and the partial exhaust of the exhaust manifold 3' at the initial start-up for the purpose of installation, durability and noise prevention. Exhaust gas provided in the exhaust gas recirculation pipe 4 'to open gas for recirculation of the intake manifold 2' and to shut off when the engine 1 'rises to a set temperature to exhaust the exhaust gas into the atmosphere. It consisted of the recirculation valve 6 '.

That is, at the start of the start, the electronic control unit senses the temperature of the engine 1 'and automatically opens the exhaust gas recirculation valve 6' so that the exhaust gas is incompletely burned in the combustion chamber of the engine and exhausted to the exhaust manifold 3 '. Part of the waste gas is recycled to the exhaust gas recirculation pipe (4 ') to be introduced into the intake manifold (2') to be re-burned, thereby reducing the emission of harmful substances such as hydrocarbons and nax emitted into the atmosphere. Prevented.

However, the exhaust gas recycled to the intake manifold 2 'contains harmful substances as it is, and even though it is mixed with the mixer supplied to the combustion chamber of the engine 1' and reburned, the temperature of the engine 1 'is maintained at the set temperature. Since the fuel is not completely burned until it is raised, the exhaust gas exhausted into the atmosphere always contains harmful substances and contaminates the atmosphere.

The present invention is to solve this problem, by connecting a plurality of purification pipes with a built-in air filter to the exhaust gas recirculation pipe connecting the exhaust manifold and the intake manifold to filter the harmful substances in the exhaust gas recycled to the intake manifold The purpose of the present invention is to provide a recirculation exhaust gas purification device for a diesel engine to improve combustion efficiency by supplying the gas to the fold.

In order to achieve the above object, the present invention provides an exhaust gas recirculation pipe connected to recycle the exhaust gas of the exhaust manifold to the intake manifold, and for the installation, durability and noise of the exhaust gas recirculation pipe. The bellows installed in the middle part and the exhaust gas of the exhaust manifold at the beginning of the start are opened to recycle the intake manifold, and the engine is shut off when the engine rises to the set temperature to exhaust the exhaust gas into the atmosphere. An air filter is installed in each of the exhaust gas recirculation valve installed in the gas recirculation pipe and the exhaust gas recirculation pipe between the bellows and the exhaust gas recirculation valve to filter out harmful substances in the exhaust gas being recirculated. It is a feature of the present invention that a plurality of purification tubes constitute a recirculation exhaust gas purification device for a diesel engine.

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

1 shows an exhaust gas recirculation tube 4 and an exhaust gas recirculation tube 4 which are connected to recycle the intake manifold 2 to the exhaust gas of the exhaust manifold 3 as an embodiment of the present invention. In order to installability, durability, and noise, the intake manifold (2) is provided with a beloose (5) installed in the middle of the exhaust gas recirculation pipe (4) and a part of the exhaust gas of the exhaust manifold (3) at the initial start-up. And exhaust gas recirculation valve (6) installed in the exhaust gas recirculation pipe (4) so as to shut off when the engine (1) rises to the set temperature and exhaust the exhaust gas into the atmosphere, while opening the valve to be recirculated. A plurality of purifying air filters 8 each installed in the exhaust gas recirculation pipe 4 between the wood 5 and the exhaust gas recirculation valve 6 to filter harmful substances in the exhaust gas being recycled. A pipe (7) constitutes a recirculation exhaust gas purification device of a diesel engine All.

The purification pipe 7 smoothly passes when the pressure to pass through the air filter 8 is generated when the harmful substances in the recycled exhaust gas are purified by the air filter 8 so that the set amount of exhaust gas is recycled. It is preferable to comprise two or more, and in the embodiment of the present invention will be described by installing two.

According to the present invention, the electronic controller senses the temperature of the engine 1 and automatically opens the exhaust gas recirculation valve 6 at the start of the engine, so that the combustion chamber of the engine 1 is incompletely burned to the exhaust manifold 3. A part of the exhaust gas exhausted is recycled to the exhaust gas recirculation tube 4, and the exhaust gas recirculated to the exhaust gas recirculation tube 4 passes through the air filter 8 of the plurality of purification tubes 7.

At this time, the reason for separating the purification pipe (7) into two is because the exhaust gas is forced to pass when the recycled exhaust gas passes through the air filter 8, the pressure is generated according to this can be smoothly recycled the exhaust gas of the set amount It is separated to make sure that it is.

Of course, two or more may be installed to increase the purification efficiency or to facilitate the passage of exhaust gas.

Therefore, the exhaust gas passing through the air filter 8 of each purification pipe 7 is purged of harmful substances and flows into the intake manifold 2 so that it is mixed with the mixer supplied to the combustion chamber of the engine 1 to be reburned. In addition, the combustion efficiency can be further increased by the temperature of the exhaust gas from which harmful substances are purified during recombustion.

At this time, since the exhaust gas recycled to the combustion chamber of the engine 1 is a purified substance, there is no risk of further generation of harmful substances in the exhaust gas even when mixed with the mixer and re-burned, thereby exhaust gas exhausted into the atmosphere. Hazardous substances in the air are significantly reduced to prevent air pollution.

As described above, the present invention connects a plurality of purification tubes with an air filter to the exhaust gas recirculation pipe connecting the exhaust manifold and the intake manifold to filter the harmful substances in the exhaust gas being recirculated to be supplied to the intake manifold. There is an advantage to improve air pollution and prevent air pollution.

Claims (1)

Exhaust gas recirculation pipe connected to recycle the intake manifold to exhaust gas from the exhaust manifold, and Berlows installed in the middle of the exhaust gas recirculation pipe for preventing the wearability, durability and noise of the exhaust gas recirculation pipe. And exhaust gas recirculation which is installed in the exhaust gas recirculation pipe so as to open some exhaust gas of the exhaust manifold to recirculate the intake manifold at the beginning of the start-up and to block the exhaust gas when the engine rises to the set temperature. And a plurality of purifying tubes each equipped with an air filter to filter harmful substances in the exhaust gas recycled by being installed in communication with the valve and the exhaust gas recirculation tube between the Bellows and the exhaust gas recirculation valve. Recirculation exhaust gas purification device of a diesel engine.