KR19980048776U - Three-way catalytic converter with foam member - Google Patents

Abstract

The present invention relates to a three-way catalyst conversion device in which a foam member is inserted between a waste gas pipe and a catalyst means so that the purification performance is increased. In the three-way catalyst conversion device of the vehicle inserted into the inside of the exhaust pipe 3 is formed with a plurality of exhaust holes (4) so that the exhaust gas is diffused to the outside, wrapped around the outer periphery of the exhaust pipe (3) And a foam member 11 formed of a porous material and a catalyst means 13 provided between the housing 12 and the foam member 11 to maximize the contact area between the exhaust gas and the catalyst means. In addition, the harmful components of the exhaust gas can be evenly absorbed by the catalyst means in the three-way catalyst device. Therefore, there is an advantage in that the exhaust gas purifying capacity of the three-way catalyst device is increased and its lifespan is also extended.

Description

Three-way catalyst conversion device with interpolated foam members.

The present invention relates to a three-way catalyst conversion device in which a foam member is interpolated, and particularly to a three-way catalyst conversion device in which a foam member is inserted to increase the purification performance by inserting a porous foam member between an exhaust gas pipe and a catalyst means. It is about.

In internal combustion engines, it is well known that the components of incompletely burned exhaust gases are harmful to the human body. This caused the pollution problem to be seriously caused by the exhaust gas emitted from many vehicles, and as the seriousness of the right to life became realistic, the authorities instituted a regulatory law on the over emissions of harmful gases (exhaust gas) as a countermeasure.

To prevent the excessive emission of harmful gases, a method of completely burning in an engine or reburning before reaching the atmosphere, and reducing the concentration of harmful gases by using a device such as a three-way catalytic converter is widely used.

The three-way catalytic converter is a device that simultaneously reduces CO (carbon monoxide), HC (hydrocarbon), and NOX (nitrogen oxide), which are toxic components in the exhaust gas, and is installed in the exhaust pipe path. Platinum and rhodium are used as a catalyst.

If there is sufficient oxygen, harmful CO and HC can be oxidized and converted into harmless CO2 (carbon dioxide) and H2O (water) respectively, and in the absence of oxygen, harmful NOX can be converted into harmless N2 (nitrogen). .

Platinum and rhodium in the three-way catalytic converter include its components, such as cotton or fiber, in which fine threads are agglomerated, and the discharge pipe passes through the inside thereof. That is, since a plurality of through holes are formed in the discharge pipe passing through the three-way catalytic converter, harmful components of the exhaust gas are absorbed into the place where the cotton or the thin thread are gathered.

However, since the cotton or thread bundles are densely packed together, only a portion adjacent to the exhaust pipe absorbs a large amount of harmful components, and the farther the exhaust pipe is, the less the harmful components are absorbed.

That is, there is a problem that the catalyst in the case of the three-way catalytic converter is not evenly used.

The present invention has been made in view of the above-described problems, and an object of the present invention is to enable efficient utilization of the catalyst in the three-way catalyst device to extend the exhaust gas purification capacity of the three-way catalyst device and its lifespan.

In order to achieve the above object, the three-way catalyst conversion device in which the foam member is interpolated according to the present invention is a three-way catalyst conversion device of an automobile in which a catalyst is inserted into the housing together with a high-density thread or cotton, and exhaust gas is exhausted. It is composed of an exhaust pipe formed with a plurality of discharge holes so as to diffuse to the outside, wrapped around the outer periphery of the exhaust pipe, the foam member formed of a porous material, and the catalyst means provided between the housing and the foam member It features.

1 is a perspective view of an exhaust pipe line to show the installation position of the three-way catalyst conversion device.

Figure 2 is a partially cut perspective view of the three-way catalytic conversion device.

Explanation of symbols for the main parts of the drawings

3: exhaust pipe 4: discharge hole

9: muffler 10: three-way catalytic converter

11: foam member

Hereinafter, with reference to the accompanying drawings an embodiment of the three-way catalytic conversion device is inserted into the foam member according to the present invention will be described in detail.

1 is a perspective view of an exhaust pipe line to show the installation position of the three-way catalyst conversion device. The exhaust gas discharged from the engine (not shown) passes through the exhaust gas pipe 5 and enters the three-way catalytic converter 10, and passes through the three-way catalyst converter 10, and the exhaust gas in which noxious substances are purified is finally discharged. By passing through the muffler (9) and the like is discharged to the atmosphere.

2 is a partially cut perspective view of the three-way catalytic conversion device. Inside the three-way catalytic converter 10 is a catalyst means containing platinum and rhodium to simultaneously reduce CO (carbon monoxide), HC (hydrocarbon), and NO x (nitrogen oxide), which are toxic components of the exhaust gas. Is provided. The catalyst means 13 contains its components such as high-density cotton or fibers in which fine threads are aggregated.

Meanwhile, a plurality of discharge holes 4 are formed in the exhaust pipe 3 passing through the housing 12 of the three-way catalytic converter 10, and surround the outer periphery of the exhaust pipe 3 to form a foam member 11. ) Is formed. The foam member 11 is preferably formed of a material such as porous Al2O3 in order to maximize the contact area with the exhaust gas of high temperature and high pressure and to minimize the coating of impurities.

In fact, the diameter of the small bubbles formed in the foam member 11 is made smaller and smaller away from the exhaust pipe 3 so that the harmful components of the exhaust gas is efficiently adsorbed.

That is, since the plurality of discharge holes 4 are formed in the exhaust pipe 3, the harmful components of the exhaust gas are adsorbed into the foam member 11, and the cotton or the thin thread is a catalyst It was moved to the means 13 to be absorbed.

As a result, the purification efficiency is increased because the contact area between the exhaust gas discharged from the exhaust pipe 3 and the catalyst means 13 is wider than the conventional one by providing the foam member 11.

As described above, according to the three-way catalyst conversion device in which the foam member is interpolated according to the present invention, the contact area between the exhaust gas and the catalyst means is maximized, and the harmful components of the exhaust gas can be evenly absorbed by the catalyst means in the three-way catalyst device. Therefore, there is an advantage in that the exhaust gas purifying capacity of the three-way catalyst device is increased and its lifespan is also extended.

Although a preferred embodiment according to the present invention has been described above, it will be understood by those skilled in the art that various modifications and changes can be made without departing from the scope of the appended claims.

Claims (1)

In a three-way catalyst conversion device of an automobile in which a catalyst is inserted into a housing together with a dense thread or cotton, An exhaust pipe 3 having a plurality of discharge holes 4 formed therein so that the exhaust gas is diffused to the outside; A foam member 11 formed around the outer circumference of the exhaust pipe 3 and formed of a porous material; Three-way catalyst conversion device is inserted into the foam member, characterized in that consisting of the catalyst means (13) built between the housing 12 and the foam member (11).