KR19980038899A - Catalytic converter of car - Google Patents

Abstract

By activating the exhaust gas passing through the inlet of the catalytic converter, the exhaust gas is distributed to be evenly contacted with the entire surface of the catalyst carrier, thereby improving durability and purification efficiency of the catalytic converter. In order to realize this, the present invention provides a catalytic converter for a vehicle which is installed in the middle of an exhaust pipe connected from a combustion chamber of an engine to purify harmful components in exhaust gas, which is connected to an entry cone 11 connected to the exhaust pipe 1. The deflector 9 is formed so that the exhaust gas is deflected, swirled and activated by the deflector.

(Selectivity: Fig. 3)

Description

Catalytic converter of car

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic converter for a motor vehicle installed in an exhaust pipe to oxidize, reduce and reduce harmful components of exhaust gas emitted from an engine.

Prior art

Recently, the prevention of air pollution due to the emission of automobiles has emerged as an important issue for environmental hygiene, and countermeasures are urgently needed.

Gases emitted from automobiles include exhaust gases emitted from exhaust pipes, blow-by gases from engine crankcases, and fuel evaporation gases evaporating from fuel tanks or carburettors. Among these, the exhaust gas refers to a gas that the fuel is burned in a cylinder and then discharged to the outside through the exhaust pipe, and the components of the exhaust gas are mostly harmless to water (H ₂ O), nitrogen (N ₂ ), and carbon dioxide gas. It also contains harmful substances such as (CO ₂ ), carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO _x ).

In order to remove the harmful components in the exhaust gas as described above, the engine improvement method and the lean mixer which conventionally improves the combustion chamber, fuel, ignition, intake and exhaust system, or installs additional equipment for controlling the combustion state, Stratified charge combustion methods for simultaneously inhaling some of the rich mixers for combustion, and catalytic converter systems for removing noxious gases with oxidation or reduction catalysts are known.

Among these methods, as shown in FIG. 1, the catalytic converter method includes a catalytic converter which oxidizes and reduces harmful components of the exhaust gas to an exhaust pipe 2, which is a passage through which exhaust gas combusted in a multi-cylinder engine moves. 3) is made by connecting. The catalytic converter 3 is composed of a case 5 connected to the exhaust pipe 1 and a carrier 7 containing a catalyst housed therein.

By such a configuration, the exhaust gas is moved through the exhaust pipe 2, and then flows into the catalytic converter 3 to convert harmful components into harmless components by oxidation and reduction catalysts.

However, in the above-described conventional catalytic converter, the carrier 7 has a problem in that durability deteriorates due to intensive deterioration of only the central portion as shown in FIG. 2.

This problem is due to the proximity mounting of the exhaust manifold for the early activation of the catalyst, due to the concentration of exhaust gas emitted from each cylinder to the central portion of the catalyst.

Further, such intensive deterioration of the catalyst carrier 7 lowers the purification efficiency of harmful components.

In order to solve the problems of the prior art, the present invention is to activate the exhaust gas passing through the inlet of the catalytic converter, the exhaust gas is distributed so as to evenly contact the entire surface of the catalyst carrier, thereby improving the durability and To improve the purification efficiency.

In addition, the present invention seeks to reduce the breakthough of harmful components by inducing swirl in the exhaust gas discharged through the exhaust pipe and lowering the flow rate.

1 is a cross-sectional view showing a catalytic converter of a typical vehicle.

Figure 2 is a front view showing a conventional catalytic converter carrier.

3 is a cross-sectional view showing a catalytic converter of a vehicle according to the present invention.

Figure 4 is a front view showing the carrier of the catalytic converter according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: exhaust pipe 3: catalytic converter

5: case 7: carrier

9: deflector 11: entry cone

As a means for realizing the above object, the present invention provides a catalytic converter in a vehicle which is installed in the middle of an exhaust pipe connected from an engine combustion chamber to purify harmful components in exhaust gas. A deflector is formed in the part.

Of course, the carrier containing the catalyst is contained in the case.

According to the above-described configuration, the deflector deflects the exhaust gas flowing toward the carrier of the catalytic converter to generate and activate a swirl, so that the exhaust gas can be evenly contacted with the entire surface of the carrier. Therefore, the carrier is generally evenly deteriorated when the exhaust gas is purged. Due to this action, the durability is improved and the purification efficiency is improved.

Example

EMBODIMENT OF THE INVENTION Hereinafter, the preferred embodiment for implementing this invention is demonstrated in detail based on an accompanying drawing.

Fig. 3 is a sectional view showing the catalytic converter of the motor vehicle related to this embodiment.

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

Reference numeral 1 in the drawings refers to the exhaust pipe. The mixer combusted in the combustion chamber of the engine is discharged through an exhaust valve, an exhaust manifold and the exhaust pipe 1.

In order to purify the harmful gas component of the exhaust gas, a catalytic converter 3 is connected to the exhaust pipe 1, and a silencer (not shown) is connected through the exhaust pipe.

Here, the catalytic converter 3 according to this embodiment, unlike the conventional one, forms a deflector 9 at the inlet of the case 5 connected through the exhaust pipe 1 to activate the flow of the exhaust gas. . Of course, the carrier 7 containing the catalyst is accommodated in the case 5.

According to the configuration of this embodiment described above, the catalytic converter 3 generates swirl flow and deflection in the exhaust gas discharged through the exhaust pipe 1 to activate the exhaust gas.

More specifically, the deflector 9 deflects the flow of exhaust gas discharged from the combustion chamber of the cylinder around the entry cone 11 of the catalytic converter 3. This action increases and activates the flowability of the exhaust gas, thereby bringing it into contact with the entire surface of the carrier 7 containing the catalyst.

Accordingly, as shown in FIG. 4, the carrier 7 including the catalyst is deteriorated evenly without biasing the entire surface, thereby increasing durability. This action also increases the volume of the carrier 7 containing the catalyst in contact with the exhaust gas, thereby enhancing the purification efficiency of harmful components.

In addition, the exhaust gas thus activated has a lower flow rate and a lower penetration rate through the carrier 7 including the catalyst, thereby improving purification efficiency and reducing exhaust loss.

Through the embodiments described above, it can be seen that the catalytic converter of the automobile according to the present invention substantially solves the problems of the prior art.

That is, the present invention activates the flow of the exhaust gas flowing into the catalytic converter and evenly distributes the purification area of the carrier containing the catalyst, thereby realizing an improvement in durability and purification efficiency.

On the other hand, the present invention is not limited to the above-described specific preferred embodiments, and any person having ordinary knowledge in the field of the present invention can make various changes without departing from the gist of the present invention claimed in the claims. Would be possible.

Claims (1)

A catalytic converter for an automobile provided with a case and a carrier containing a catalyst contained therein and substantially purifying harmful components of exhaust gas, the catalyst converter of an automobile provided in the middle of an exhaust pipe connected from a combustion chamber of an engine, said exhaust pipe and A catalytic converter of an automobile, characterized in that a deflector is formed at a case inlet of a catalytic converter to be connected so that exhaust gas is deflected and swirled.