KR100453651B1 - Catalytic converter system to purify exhaust gas - Google Patents
Catalytic converter system to purify exhaust gas Download PDFInfo
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- KR100453651B1 KR100453651B1 KR10-2001-0059630A KR20010059630A KR100453651B1 KR 100453651 B1 KR100453651 B1 KR 100453651B1 KR 20010059630 A KR20010059630 A KR 20010059630A KR 100453651 B1 KR100453651 B1 KR 100453651B1
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- Prior art keywords
- exhaust gas
- carrier
- catalytic converter
- main body
- front muffler
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
본 발명의 목적은 배기가스의 원활한 확산으로 담체의 정화기능을 향상시키고 열응력 차이에 의한 내구성 저하를 방지하며, 담체의 효율성 제고로 담체용량의 축소가 가능한 배기가스정화용 촉매변환장치를 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a catalyst conversion device for purifying exhaust gas which can reduce the capacity of the carrier by improving the purification function of the carrier by preventing the diffusion of the exhaust gas and preventing durability deterioration due to thermal stress difference and improving the efficiency of the carrier. .
이를이해 본 발명은 담체와 매트 및 쉘로 조립된 원기둥형상의 촉매변환기 본체와;The present invention is a cylindrical catalytic converter body assembled from a carrier, a mat and a shell;
상기 본체로 배기가스를 도입하는 전방머플러부와;A front muffler for introducing exhaust gas into the main body;
상기 전방머플러부로부터 직경이 점차 확대되어 상기 본체의 쉘에 접속되는 입구부콘과;An inlet part cone which is gradually enlarged in diameter from the front muffler part and connected to the shell of the main body;
상기 촉매변환기 본체 후단에 접속되어 후방으로 갈수록 직경이 감소되는 출구부콘; 및An outlet portion cone connected to a rear end of the main body of the catalytic converter, the diameter of which decreases toward the rear; And
상기 입구부콘내에 설치되어 전방머플러를 통해 도입되는 배기가스의 일부는 상기 담체의 중앙부로 유도하고 나머지는 담체의 외곽방향을 향해 확산시키도록 유도하는 배기가스 흐름제어부재; 를 포함하여 구성되어 있다.An exhaust gas flow control member installed in the inlet cone to guide a part of the exhaust gas introduced through the front muffler to a central portion of the carrier and to diffuse the other toward the outer direction of the carrier; It is configured to include.
Description
본 발명은 엔진으로부터 배기되는 배기가스를 정화하여 배출하는 촉매변환장치(catalytic converter system)에 관한 것이다.The present invention relates to a catalytic converter system for purifying and exhausting exhaust gas exhausted from an engine.
엔진으로부터 배기되는 배기가스속에는 환경오염을 유발하고 암을 일으키는 등 인체에 유해한 CO, HC, NOx 등의 유해성분을 포함하고 있어, 환경오염을 방지하기 위해 차량의 배기다기관 후방에 촉매변환장치를 장착하여 이 내부를 통과하는 배기가스를 화학적 변환과정을 거쳐 무해한 가스로 정화(CO →CO2, HC →H2O, NOx →N2로 산화, 환원)하여 배출토록 하고 있다.The exhaust gas exhausted from the engine contains harmful components such as CO, HC, and NOx that are harmful to the human body, which causes environmental pollution and cancer. Therefore, the exhaust gas passing through the interior is purified through a chemical conversion process (oxidized to CO → CO 2 , HC → H 2 O, and NOx → N 2 ) to be discharged.
촉매변환장치(20)는 도 3에 도시하는 것과같이 화학적 변환과정으로 배기가스를 정화하는 다공질 세라믹 원주형 물체인 담체(21, substrate), 그 담체(21)를 감싸 적절한 지지압력을 가해 담체(21)의 위치를 고정하고, 배기가스 온도가 외부로 전도되는 것을 차단하는 역활을 하는 다공질석과 화이바의 결합물질로 구성되는 매트(22, mat)와, 그 매트(22)를 감싸고 촉매변환장치(20)의 외형 구조물을 형성하는 스테인레스 스틸재의 쉘(23, shell)로 구성되어 있다.As shown in FIG. 3, the catalytic converter 20 includes a substrate 21, which is a porous ceramic columnar object for purifying exhaust gas through a chemical conversion process, and a suitable support pressure wrapped around the carrier 21 to apply a carrier ( 21) a mat 22 composed of a combination of porous stone and fiber, which fixes the position of the exhaust gas and prevents the exhaust gas from being conducted to the outside, and wraps the mat 22 with a catalytic converter ( It consists of the shell 23 of the stainless steel which forms the external structure of 20).
그러나 담체(21)의 단면적은 넓은데 비하여 입구부(24)의 단면적은 좁기 때문에 입구부(24)를 통해 고속으로 유입되는 배기가스가 담체(21)이 전면적에 걸쳐 충분히 확산되지 못하고 담체(21)의 중앙부에 집중되도록 유입되어 통과하게 되므로써 담체(21) 중심부에 화학적 반응이 집중되고 또 배기가스 집중에 의해 담체(21)의 중심부는 높은 온도를 가지는데 비하여 외곽측은 낮은 온도를 갖게되어 불균일한 온도분포로 담체(21)에 매우 큰 열응력의 차이가 발생하게 된다.However, since the cross-sectional area of the carrier 21 is large, the cross-sectional area of the inlet 24 is narrow, and the exhaust gas flowing through the inlet 24 at high speed through the inlet 24 is not sufficiently diffused over the entire area of the carrier 21. The chemical reaction is concentrated in the center of the carrier 21 due to the inflow and concentration through the center of the carrier, and the center of the carrier 21 has a high temperature due to the concentration of exhaust gas. Due to the temperature distribution, a very large difference in thermal stress occurs in the carrier 21.
이와같이 담체 내외부의 급격한 열응력의 차이는 담체(21)에 열충격(thermalshock)을 가해 원주 방향으로 균열이 나타나는 링오프 크랙(ring-off crack)현상을 일으키게 되며, 링오프 크랙은 담체(21)를 통과하는 배기가스의 흐름을 차단하여 촉매의 정화효율을 저하시킬뿐 아니라 배기가스의 배압을 증가시켜 촉매변환장치의 기능을 저하시키고 내구성을 단축시키는 원인이 되는 문제점이 나타나고 있다.As such, the rapid thermal stress difference between the inside and the outside of the carrier causes a thermal shock to the carrier 21 to cause ring-off cracks in which the cracks appear in the circumferential direction. As a result of blocking the flow of the exhaust gas passing through not only to lower the purification efficiency of the catalyst, but also to increase the back pressure of the exhaust gas, a problem of reducing the function of the catalytic converter and shortening the durability has appeared.
이에 본 발명은 상기한 점을 감안하여 제안한 것으로서 그의 목적으로 하는 것은Accordingly, the present invention has been made in view of the above-mentioned points, and its object is
배기가스의 원활한 확산으로 담체의 정화기능을 향상시키고 열응력 차이에 의한 내구성 저하를 방지하며, 담체의 효율성 제고로 담체용량의 축소가 가능한 배기가스정화용 촉매변환장치를 제공하는데 있다.The present invention provides a catalytic converter for purifying exhaust gas that can reduce the capacity of a carrier by improving the purification function of the carrier and preventing durability degradation due to thermal stress differences.
상기한 목적을 달성하기 위하여 본 발명은The present invention to achieve the above object
담체와 매트 및 쉘로 조립된 원기둥형상의 촉매변환기 본체와;A cylindrical catalytic converter body assembled from a carrier, a mat and a shell;
상기 본체로 배기가스를 도입하는 전방머플러부와;A front muffler for introducing exhaust gas into the main body;
상기 전방머플러부로부터 직경이 점차 확대되어 상기 본체의 쉘에 접속되는 입구부콘과;An inlet part cone which is gradually enlarged in diameter from the front muffler part and connected to the shell of the main body;
상기 촉매변환기 본체 후단에 접속되어 후방으로 갈수록 직경이 감소되는 출구부콘; 및An outlet portion cone connected to a rear end of the main body of the catalytic converter, the diameter of which decreases toward the rear; And
상기 입구부콘내에 설치되어 전방머플러를 통해 도입되는 배기가스의 일부는 상기 담체의 중앙부로 유도하고 나머지는 담체의 외곽방향을 향해 확산시키도록 유도하는 배기가스 흐름제어부재; 를 포함하여 구성되어 있다.An exhaust gas flow control member installed in the inlet cone to guide a part of the exhaust gas introduced through the front muffler to a central portion of the carrier and to diffuse the other toward the outer direction of the carrier; It is configured to include.
도 1은 본 발명에 의한 촉매변환장치의 부품 분해 사시도1 is an exploded perspective view of parts of a catalytic converter according to the present invention
도 2는 동상 촉매변환장치의 조립된 정단면도2 is an assembled front sectional view of the in-phase catalytic converter;
도 3은 종래기술3 is a prior art
※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
1 : 촉매변환장치 2 : 촉매변환기 본체1 catalytic converter 2 catalytic converter body
3 : 입구부콘 4 : 전방머플러3: inlet cone 4: front muffler
5 : 출구부콘 6 : 배기가스 흐름제어부재5 outlet cone 6 exhaust gas flow control member
7 : 담체 8 : 매트7: carrier 8: mat
9 : 쉘 10 : 테이퍼원통9: shell 10: tapered cylinder
11 : 선단부 12 : 후단부11: front end 12: rear end
13 : 핀 14 : 외부하우징13: pin 14: external housing
이하 본 발명의 구성을 첨부한 도면을 참조하여 설명한다.Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.
도 1은 본 발명에 의한 촉매변환장치의 부품분해 사시도이며, 도 2는 본 발명에 의한 촉매변환장치의 정단면도이다.1 is an exploded perspective view of a part of a catalytic converter according to the present invention, Figure 2 is a front sectional view of the catalytic converter according to the present invention.
본 발명의 촉매변환장치(1)는 촉매변환기 본체(2)와 입구부콘(3)이 일체로 된 전방머플러(4), 본체(2) 후단에 접속되는 출구부콘(5) 및 입구부콘(3)내에 수용되도록 고정장착되는 배기가스 흐름제어부재(6)로 구성된다.The catalytic converter 1 of the present invention comprises a front muffler 4 in which the catalytic converter body 2 and the inlet cone 3 are integrated, an outlet cone 5 and an inlet cone 3 connected to the rear end of the main body 2. And an exhaust gas flow control member 6 which is fixedly mounted to be accommodated therein.
상기 촉매변환기 본체(2)는 중심에 배기가스를 정화하도록 벌집형상으로 된 담체(7)와, 그 담체(7) 외주를 감싸 보호하는 스테인레스 스틸재의 쉘(9)로 구성되며, 원기둥 토막 형상으로 제작되어 입구부콘(3) 및 출구부콘(5)과 맞댄후 용접에 의해 일체로 접속된다.The catalytic converter body (2) is composed of a carrier (7) in the form of a honeycomb to purify the exhaust gas at the center, and a shell (9) made of stainless steel wrapped around the carrier (7) to protect it. It is produced and connected to the inlet cone 3 and the outlet cone 5 and integrally connected by welding.
상기 입구부콘(3)은 전방머플러(4)로부터 점차 직경이 증가하여 나팔관 모양으로 확개되어 있으며, 상기 본체(2)와 접속하여 용접하게 된다.The inlet cone 3 is gradually enlarged in the shape of a fallopian tube by gradually increasing its diameter from the front muffler 4 and connected to the main body 2 to be welded.
그리고 상기 배기가스 흐름제어부재(6)는 테이퍼 원통(10)에 있어 단지름의 선단부(11)의 단면적이 전방머플러(4) 단면적의 60% 이하, 바람직하기로는 30∼60%가 되도록 하고, 장지름의 후단부(12) 단면적은 담체(7) 단면적의 50% 이상, 바람직하기로는 50∼60%가 되도록 하는 것이 바람직하다.The exhaust gas flow control member 6 has a cross-sectional area of the tip end portion 11 of the oil in the tapered cylinder 10 such that the cross-sectional area of the front muffler 4 is 60% or less, preferably 30 to 60%. The cross-sectional area of the rear end portion 12 of the long diameter is preferably 50% or more, preferably 50 to 60% of the cross-sectional area of the carrier 7.
또 테이퍼 원통(10)의 외주로 방사상으로 뻣어있는 얇은 핀(13)들은 입구부콘(3)의 테이퍼 내벽면에 접촉하여 용접에 의해 고정하게 된다. 여기서 미설명 부호 14는 촉매변환장치(1)의 외부하우징이다.In addition, the thin fins 13 which are radially stiffly around the outer periphery of the taper cylinder 10 are in contact with the taper inner wall surface of the inlet cone 3 to be fixed by welding. Here, reference numeral 14 denotes an external housing of the catalytic converter 1.
이하에 본 발명의 작용에 대하여 설명한다.The operation of the present invention will be described below.
전방머플러(4)로 유입되는 배기가스중 일부는 테이퍼 원통(10)의 선단부 단면적을 통하여 유입되면서 후단부(12)로 가면서 확산되어 담체(7) 중앙부의 유속을 저하시키고 또 담체에의 통과 단면적이 비교적 넓은 중심부에 걸쳐 포진되어지게 되며, 테이퍼 원통(10)의 선단부(11) 단면적 외주로 지나는 공기는 테이퍼 원통(10) 외주를 따라 흐름이 일어나 담체(7)의 외곽쪽으로 공급되어 통과하게 되며, 이로부터 담체(7)의 전체면적에 걸쳐 배기가스가 고르게 분포하여 통과하게 될 뿐 아니라 담체(7) 중앙부의 유속도 저하되게 되어 전체적으로 담체(7) 통과 유속이 고르게 되는 것이다.Some of the exhaust gas flowing into the front muffler 4 flows through the cross section of the tip of the tapered cylinder 10 and diffuses toward the rear end 12 to decrease the flow velocity of the center of the carrier 7 and to pass through the carrier. This relatively wide center is to be shrouded, the air passing to the outer periphery of the cross-sectional area of the front end portion 11 of the tapered cylinder 10 flows along the outer periphery of the tapered cylinder 10 is supplied to the outside of the carrier (7) to pass through From this, the exhaust gas is distributed evenly over the entire area of the carrier 7, and the flow velocity of the center of the carrier 7 is lowered, so that the flow rate of the carrier 7 is uniform.
이상과 같은 본 발명은 배기가스를 담체의 전체 면적에 걸쳐 분산하는 배기가스 흐름제어부재를 담체 전방의 입구부콘에 내장하는 것에 의해서 배기가스의 균일분포에 의한 배기가스 정화효율이 향상되고, 담체의 중심과 외곽측의 온도편차가 줄어들어 열응력 차이에 의한 균열 발생이 감소되고, 정화효율 향상에 따라 담체용량을 축소하는 것이 가능하다.In the present invention as described above, the exhaust gas purification efficiency due to the uniform distribution of the exhaust gas is improved by incorporating the exhaust gas flow control member for dispersing the exhaust gas over the entire area of the carrier in the inlet cone in front of the carrier. The temperature deviation between the center and the outer side is reduced, so that the occurrence of cracking due to the difference in thermal stress is reduced, and the carrier capacity can be reduced by improving the purification efficiency.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0059630A KR100453651B1 (en) | 2001-09-26 | 2001-09-26 | Catalytic converter system to purify exhaust gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0059630A KR100453651B1 (en) | 2001-09-26 | 2001-09-26 | Catalytic converter system to purify exhaust gas |
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| Publication Number | Publication Date |
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| KR20030026581A KR20030026581A (en) | 2003-04-03 |
| KR100453651B1 true KR100453651B1 (en) | 2004-10-20 |
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| KR (1) | KR100453651B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4004887A (en) * | 1973-03-16 | 1977-01-25 | Tenneco Inc. | Catalytic converter having a resilient thermal-variation compensating monolith-mounting arrangement |
| US5058381A (en) * | 1990-01-24 | 1991-10-22 | General Motors Corporation | Low restriction exhaust treatment apparatus |
| JPH0693850A (en) * | 1992-09-11 | 1994-04-05 | Hitachi Ltd | Storage vessel |
| KR950033573U (en) * | 1994-05-17 | 1995-12-16 | Automotive Flow Control Catalyst | |
| KR19980035137U (en) * | 1996-12-12 | 1998-09-15 | 박병재 | Exhaust Catalytic Converter |
-
2001
- 2001-09-26 KR KR10-2001-0059630A patent/KR100453651B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4004887A (en) * | 1973-03-16 | 1977-01-25 | Tenneco Inc. | Catalytic converter having a resilient thermal-variation compensating monolith-mounting arrangement |
| US5058381A (en) * | 1990-01-24 | 1991-10-22 | General Motors Corporation | Low restriction exhaust treatment apparatus |
| JPH0693850A (en) * | 1992-09-11 | 1994-04-05 | Hitachi Ltd | Storage vessel |
| KR950033573U (en) * | 1994-05-17 | 1995-12-16 | Automotive Flow Control Catalyst | |
| KR19980035137U (en) * | 1996-12-12 | 1998-09-15 | 박병재 | Exhaust Catalytic Converter |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030026581A (en) | 2003-04-03 |
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