KR980009790A - Automotive catalytic converters - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic converter for an automobile which reduces and reduces harmful components of exhaust gas generated in an engine, In order to increase the efficiency of the purification. In addition, the workability is improved by simplifying the structure. In order to realize this, the catalytic converter of the present invention is formed in at least one half of the layer The traps 7 are arranged so as to be offset from each other in the continuous odd-numbered layer and the even-numbered layer, The trap carrier 6 is formed, A catalyst (9) is disposed behind the trap carrier. Further, the catalyst 8 is disposed in the other half of the layer, and the catalyst is disposed in the odd and even layers Place it opposite the trap.

Description

Automotive catalytic converters

Recently, prevention of air pollution caused by automobile exhaust gas is becoming an important issue in environmental hygiene, and measures are urgently needed.

Gas discharged from an automobile includes exhaust gas discharged from an exhaust pipe, blowby gas from a crankcase of an engine, and fuel evaporating gas which evaporates in a fuel tank or a vaporizer. Among them, the exhaust gas refers to a gas that is burned in a cylinder and then discharged to the outside through an exhaust pipe, and the components of the exhaust gas are mostly harmless to the human body ), nitrogen( ), Carbon dioxide gas ) Or carbon monoxide ( ), Hydrocarbons ( ), Nitrogen oxides ( ) And other hazardous substances.

In order to remove the harmful components in the exhaust gas as described above, there have been conventionally used an engine improvement system in which an additional device for improving the fuel, ignition, intake and exhaust system as well as the combustion chamber as well as the combustion state is installed, A stratified charge combustion method in which some dense mixers are sucked in at the same time in order to efficiently combust them, and a catalytic converter system in which harmful gas is removed by an oxidation or reduction catalyst are known.

Among these methods, the catalytic converter system is constituted by connecting a catalytic converter, which oxidizes and reduces the harmful components of the exhaust gas, to an exhaust pipe, which is a passage through which the exhaust gas burned in the multi-cylinder engine moves.

According to this structure, the exhaust gas is moved through the exhaust pipe and then introduced into the catalytic converter, and the harmful component is converted into the harmless component by the oxidation and reduction catalyst.

In the conventional exhaust gas purifying apparatus, the catalyst requires a temperature and a residence time necessary for reaction with noxious gas, so that the performance of the catalyst deteriorates at the same time when the engine is cold.

According to such a problem, conventionally, when the engine is cold-started, In order to suppress the emission amount of the catalyst, There is a trap installed.

The catalytic converter shown in FIG. 1 has a generally known structure, In the trap 1 And after the activation of the rear catalyst 2 And is purified.

The catalytic converter shown in FIG. 2 is installed between the catalyst 2 A hollow (3) is formed in the trap (1), and a control valve (4) is provided in front of the hollow. The exhaust gas is led to the trap 1 And when the rear catalyst 2 is activated The exhaust gas is made to flow through the hollow 3 of the trap 1, The trapped (1) So as to be cleaned.

Reference numeral 5 in the drawings denotes a shroud as a case.

However, the catalytic converter of FIG. 1 In the front surface of the trap 1, The adsorption site Is not adsorbed, so that the purification efficiency is poor.

The structure of the catalytic converter of FIG. 2 is complicated, and a separate system for adjusting the control valve 4 is required.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, The present invention provides a catalytic converter of an automobile which is simple in structure while enhancing the purification efficiency of the catalytic converter.

FIG. 1 is a cross-sectional view of a conventional known automotive catalytic converter; FIG.

FIG. 2 is a cross-sectional view of a catalytic converter of another known embodiment; FIG.

FIG. 3 is a cross-sectional view of a catalytic converter of an automobile according to the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

5: Shiroud 6: Trap carrier

7: Traps 8 and 9: Catalyst

TECHNICAL FIELD OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic converter of an automobile installed in a seawater pipe for oxidizing and reducing harmful components of exhaust gas discharged from an engine, To the catalytic converter.

As means for realizing the above object, the present invention proposes a catalytic converter for an automobile having a construction described below.

That is, in the catalytic converter of the present invention, at least half Trap < / RTI > The traps are arranged in multiple layers offset from each other in the odd and even layers A trap carrier, A catalyst disposed at the rear of the trap carrier, A trap carrier and a shroud in which a catalyst is housed.

In addition, the catalyst is disposed in the other half of the layer, It is placed opposite the trap.

According to this configuration, the exhaust gas discharged from the engine, Lt; RTI ID = 0.0 > It is adsorbed and removed from each layer in the trap.

In addition, the exhaust gas, After cold starting, Purified by a catalyst disposed in the next layer of the trap, and finally And is again purged by a catalyst disposed behind the trap carrier.

Example

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

3 is a sectional view showing a catalytic converter of an automobile according to the present embodiment.

In describing the present embodiment, the same reference numerals are used for the configurations of the present embodiment which are the same as the drawings cited in the prior art, and will not be described again for clarity of explanation.

Reference numeral 5 in the drawing refers to a shroud as a case in which a catalyst carrier is accommodated, as is well known. The shroud 5 is connected to an exhaust pipe (not shown).

In the catalytic converter according to the present embodiment, at least half Is formed as a trap (7) The traps (7) are arranged in multiple layers staggered from each other in successive odd-numbered layers and even- And a trap carrier (6).

This configuration The traps 7 are arranged in multiple layers so that when the engine is cold started, . That is, The trap 7, unlike the prior art, The adsorption area of the adsorbent is increased.

The catalyst 8 is formed in the other half of the layer on which the trap 7 is formed. This catalyst (8) is fed after the cold start The trapped (7) . In addition, Trap (7) and catalyst (8) are arranged alternating with each other in the odd and even layers.

Meanwhile, The trap 7 may be composed of at least one third or more to one half or less of the layer. In this case, the catalyst 8 is formed in the remaining portion. In addition, The traps 7 are arranged so that they do not overlap each other in successive layers, and the combination of the multiple layers is preferably circular.

In this way, A catalyst 9 is disposed behind the trap carrier 6, The trap carrier (6) and the catalyst (9) are enclosed in the interior of the shroud (5).

Accordingly, The trap 6 and the catalyst 9 may be circular, elliptical, or polygonal, similar to the shape of the shroud 5.

According to the structure of the present embodiment described above, the exhaust gas discharged from the engine, Lt; RTI ID = 0.0 > Is adsorbed and removed in the entire layer of the trap (7). This action And the purification efficiency is ultimately increased.

After cold starting, the exhaust gas, Respectively, Is purified by a catalyst (7) disposed in the next layer of the trap (7) Is finally purified again by the catalyst (9) disposed at the rear of the trap carrier (6).

By this action, the catalytic converter of the present embodiment As well as the emission amount of the exhaust gas in the first half.

It will be understood from the above description that the catalytic converter of an automobile according to the present invention substantially obviates the problems of the prior art.

That is, When the cold start The effect of minimizing the amount of generated heat is obtained.

Further, the present invention also obtains the effect of increasing the purification efficiency of the exhaust gas by the catalyst arranged in multiple layers.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. .

Claims (4)

At least half of the floor Trap < / RTI > The traps are arranged in multiple layers offset from each other in the odd and even layers Trap carrier and its A catalyst disposed behind the trap carrier, Characterized in that the catalyst carrier comprises a trap carrier and a shroud in which a catalyst is housed. The method according to claim 1, Catalyst is formed in the other half of the one layer on which the trap is formed. 3. The method according to claim 1 or 2, Characterized in that the trap and the catalyst are arranged alternatingly with each other. The method according to claim 1, Wherein the trap comprises at least one third of the layer. ※ Note: It is disclosed by the contents of the first application.