KR20040088644A - Catalytic converter apparatus for exhaust gas of vehicle - Google Patents

Abstract

PURPOSE: An exhaust gas catalytic converter for a vehicle is provided to increase durability and purification efficiency by improving the warm up-type catalytic converter connected to a lower end of an exhaust manifold and protecting a mat supporting a catalyst from being exposed to exhaust gas. CONSTITUTION: An exhaust gas catalytic converter(30) for a vehicle is composed of a housing(33) for embedding a catalyst(31) and a mat(32); inlet ports formed at both sides of the housing to flow in the exhaust gas; a discharge port for discharging the purified exhaust gas to a muffler; an end cone installed at the discharge port and formed with a flange for the connection with an exhaust pipe; and an inner ring(50) disposed at the inlet port of the exhaust gas catalytic converter to cut off the exhaust gas from flowing into the mat. The inlet port is inserted into a connection hole(42) formed at a connection unit(41) arranged at the lower end of the exhaust manifold.

Description

Catalytic converter apparatus for exhaust gas of vehicle

The present invention relates to an exhaust gas purifying apparatus for automobiles, and more particularly, to an improved exhaust gas purifying apparatus for purifying harmful gas remaining in exhaust gas.

When the vehicle exhaust gas purification device explodes by mixing fuel and air to obtain the thrust necessary for driving a car, combustion gas is generated during this explosion process, and harmful substances contained in the combustion gas are immediately released to the atmosphere to prevent air pollution. It is installed to prevent causing.

As described above, the exhaust gas generated by the combustion of the engine is discharged by mixing carbon monoxide and hydrocarbons, which are harmful gases, and nitrogen oxides, water vapor and carbon dioxide, which are harmless gases.

Carbon monoxide, a noxious gas, is a colorless and odorless gas generated when oxygen is depleted, and when such carbon monoxide is released into the atmosphere in an unpurified state, it causes a problem of oxygen deficiency in the body inhaling the gas.

In the case of nitrogen oxides, irritating odors are harmful gases, which are the main cause of photochemical smog, and in the case of hydrocarbons, gases or particulates of compounds generated by incomplete combustion of fuel are collectively referred to.

When these hydrocarbons are released to the air without purification, they are decomposed or chemically reacted to the atmosphere, rather than direct air pollution by hydrocarbons, to provide photochemical smog.

As described above, the exhaust gas purification apparatus is configured to purify the harmful gas component contained in the exhaust gas discharged from the engine to reduce the harmful gas such as carbon dioxide, water vapor, oxygen, and nitrogen and release it into the atmosphere.

The exhaust gas purifier is a device for purifying harmful gases by using catalysts such as platinum, rhodium, and palladium, which are reaction promoters that help the reactants to oxidize and reduce reactions under appropriate conditions without changing themselves.

The conventional exhaust gas purification device as described above was connected at a certain distance from the exhaust manifold, but in recent years, it is possible to conduct as much heat as possible from the engine during initial cold start to increase the exhaust gas purification efficiency. A warm-up type is used, in which an exhaust gas purifying device is installed at a position close to the engine.

This conventional warm-up type exhaust gas purifying apparatus 1 is as shown in FIG. 4;

The upper end portion 5 of the exhaust gas purifying apparatus 1 is connected to a connection hole 4 formed in the connection portion 3 formed at the lower end portion of the exhaust manifold 2 fixed to the exhaust side of the cylinder block of the automobile engine. The welding 6 is fixed.

The exhaust gas purifying apparatus 1 connected as described above has a gap generated between the connection hole 4 of the exhaust manifold 2 and the upper end 5 of the exhaust gas purifying apparatus 1 according to the heat change of the engine exhaust gas. In order to hold the catalyst (7) in addition to the catalyst (7) mounted in the exhaust gas purifying device (1) through a mat (9) interposed between the housing (8) and the catalyst (7) to support the catalyst (7) Flows in.

In this way, when the exhaust gas enters the mat and is exposed for a long time, it causes erosion of the mat. In this case, the catalyst cannot be stably maintained, which causes the durability of the exhaust gas purifying device to become weak. Several problems arise, such as the inability to purify gas easily.

Accordingly, the present invention improves the exhaust gas purifying apparatus of the warm-up type connected to the lower end of the exhaust manifold connected to the engine as invented to solve the above problems, thereby protecting the mat supporting the catalyst from being exposed to the exhaust gas. The purpose of the present invention is to increase the durability and purification efficiency of the exhaust gas purifying apparatus.

1 is a perspective view showing a exhaust gas purification apparatus for a warm-up type vehicle for explaining the present invention.

FIG. 2 is a cross-sectional view illustrating an manifold and a connection portion of a warm-up type automobile exhaust gas purification apparatus applied to FIG. 1.

Figure 3 is a broken perspective view showing an extract of the inner ring of the exhaust gas purifying device for warm-up type vehicle to which the technique of the present invention is applied

Figure 4 is a cross-sectional view showing an extract of the manifold and the connection portion of the exhaust gas purification apparatus for a warm-up type vehicle to which the prior art is applied.

* Description of the symbols used in the minor parts of the drawings *

30; Exhaust Gas Purification System

40; Exhaust manifold

50; Inner ring

51; Medial rim

52; Outer rim

53; Accommodation home

54; Bend

Hereinafter, with reference to the accompanying drawings will be described the configuration, operation and effects of the present invention for achieving the above object.

1 is a perspective view showing a warm-up type automobile exhaust gas purifying apparatus for explaining the present invention, Figure 2 is a cross-sectional view showing the manifold and the connecting portion of the warm-up type automotive exhaust gas purification apparatus applied to Figure 1, Figure 3 is described together as a broken perspective showing an extract of the inner ring of the exhaust gas purifying device for warm-up type vehicle to which the technique of the present invention is applied.

Conventional warm-up type exhaust gas purifying apparatus 30 includes a housing 33 having a catalyst 31 and a mat 32 installed therein, and both sides of the housing 33 have an inlet for inlet gas and purification. And a discharge port for discharging the exhaust gas to a muffler or the like.

The outlet port is configured to have an end cone 37 having a flange 36 for connecting with the exhaust pipe.

The inlet of the exhaust gas purifying apparatus 30 as described above is inserted into the connecting hole 42 formed in the connecting portion 41 provided at the lower end of the exhaust manifold 40 fixed to the cylinder block exhaust side of the engine. The welding 43 is fixed.

In the present invention, by improving the connection portion 45 of the exhaust gas purification device 30 and the exhaust manifold 40 to block the exhaust gas flowing into the mat 32, the performance and durability of the exhaust gas purification device 30 It is characterized by making it possible to contribute to the improvement.

To this end, in the present invention, the inlet side of the exhaust gas purifying apparatus 30 is configured to further include an inner ring 50 which can block the inflow of the exhaust gas into the mat 32.

The inner ring 50 is a roughly U-shaped accommodating groove 53 formed by the inner rim 51 and the outer rim 52 to accommodate the mat 32 and the end of the housing 33 positioned at the inlet side. To have.

The lower end of the outer rim 52 of the inner ring 50 further forms a bent portion 54 facing the lower end of the connecting portion 41 of the exhaust manifold 40 to weld the connecting portion 41 and the inner portion at the time of welding 43. The housing 50 of the ring 50 and the exhaust gas purifying apparatus 30 is configured to be firmly fixed.

The present invention as described above,

The inner rim 51 of the inner ring 50 is inserted into the mat 32 interposed between the catalyst 31 and the housing 33, and the outer rim 52 is in close contact with the outside of the housing 33. By fixing the bent portion 54 provided at the lower end of the bent portion 54 at the lower end of the connecting portion 41 of the exhaust manifold 40, the initial state can be continuously maintained.

In this state, since the exhaust gas can be prevented from flowing into the mat 32 supporting the catalyst 31 or out of the housing 33, the catalyst 31 is stabilized by preventing the mat 32 from eroding. It will be possible to maintain the state.

The present invention as described above improves the exhaust gas purifying device of the warm-up type connected to the lower end of the exhaust manifold connected to the engine to protect the mat supporting the catalyst to the exhaust gas to prevent the exhaust gas purifying apparatus. Various effects can be obtained, such as increased durability and purification efficiency.

Claims (3)

A housing (33) provided with the catalyst (31) and the mat (32) installed inward; Inlets for exhaust gas inlet on both sides of the housing 33; An outlet for discharging the purified exhaust gas to the muffler; The outlet has an end cone 37 having a flange 36 for connecting with the exhaust pipe; In the conventional warm-up type exhaust gas purifying device (30), the inlet is inserted into the connecting hole (42) formed in the connecting portion (41) provided at the lower end of the exhaust manifold (40) and fixed by welding (43); The exhaust gas purifying apparatus for automobiles, further comprising an inner ring (50) which can block the inflow of the exhaust gas into the mat (32) on the inlet side of the exhaust gas purifying apparatus (30). The method of claim 1; The inner ring 50 includes a receiving groove 53 formed by the inner rim 51 and the outer rim 52 to accommodate the mat 32 and the end of the housing 33 located on the inlet side. An exhaust gas purifying apparatus for automobiles, characterized in that. The method of claim 1; The lower end of the outer rim 52 of the inner ring 50 further forms a bent portion 54 facing the lower end of the connecting portion 41 of the exhaust manifold 40; An exhaust gas purifying apparatus for automobiles, wherein the connection part 41, the inner ring 50, and the housing 33 can be firmly fixed during welding 43.