KR100191996B1 - Device for purifying exhaust gas of an internal combustion engine - Google Patents
Device for purifying exhaust gas of an internal combustion engine Download PDFInfo
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- KR100191996B1 KR100191996B1 KR1019950067077A KR19950067077A KR100191996B1 KR 100191996 B1 KR100191996 B1 KR 100191996B1 KR 1019950067077 A KR1019950067077 A KR 1019950067077A KR 19950067077 A KR19950067077 A KR 19950067077A KR 100191996 B1 KR100191996 B1 KR 100191996B1
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- catalyst
- exhaust gas
- fuel
- branch pipe
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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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
Abstract
본 발명 은 내연기관의 배기가스 정화장치를 개시한다. 개시된 장치는, 메인촉매가 설치된 주배 기관으로부터 분기되는 분기관과, 상기 분기관에 설치되며 연료통에서 증발된 증발가스를 점화연료로 사용하여 연료를 촉매연소시키는 촉매연소기와, 상기 분기관과 인접되는 주배기관에 설치되며 상기 촉매 연소기로부터 열을 전달받아 냉시 동시 주배기관을 통해 배출되는 배기가스의 유해성분을 연소시키는 예비촉매를 포함하는 것을 특징으로 한다. 따라서 엔진 초기 시동시에 발생되는 배기 가스 중의 유해성분을 효율적으로 정화시킬 수 있게 된다.The present invention discloses an exhaust gas purification apparatus of an internal combustion engine. The disclosed apparatus includes a branch pipe branched from a main exhaust pipe provided with a main catalyst, a catalytic combustion device installed at the branch pipe and catalytically burning fuel using evaporated gas evaporated from a fuel tank as an ignition fuel, and adjacent to the branch pipe. It is installed in the main exhaust pipe is characterized in that it comprises a pre-catalyst for receiving the heat from the catalytic combustor to burn the harmful components of the exhaust gas discharged through the simultaneous cold exhaust pipe when cold. Therefore, it is possible to efficiently purify the harmful components in the exhaust gas generated at the initial start of the engine.
Description
제1도는 본 발명에 다른 내연기관의 배기가스 정화장치를 도시한 개략도.1 is a schematic view showing an exhaust gas purification apparatus for an internal combustion engine according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
2 : 엔진 3 : 주배기관2: engine 3: main exhaust pipe
4 : 메인촉매 5 : 분기관4: main catalyst 5: branch pipe
6 : 예비촉매 10 : 촉매연소기6: precatalyst 10: catalytic burner
11 : 촉매 12 : 연료통11 catalyst 12 fuel container
13 : 파이롯트 버너 14 : 점화장치13: pilot burner 14: ignition device
15 : 연료펌프 16 : 분사노즐15 fuel pump 16 injection nozzle
17 : 송풍기17: blower
본 발명은 내연 기관의 배기가스 정화장치에 관한 것으로, 특히 연료통의 증발가스와 촉매연소기를 이용하여 엔진 냉시동시에 발생되는 배기가스의 유해성분을 정화시키는 내연 기관의 배기 가스 정화장치에 관한 것이다.The present invention relates to an exhaust gas purification apparatus for an internal combustion engine, and more particularly, to an exhaust gas purification apparatus for an internal combustion engine that purifies harmful components of exhaust gas generated during engine cold start by using evaporation gas and a catalytic combustion device of a fuel tank.
현재 세계적으로 관심이 고조되고 있는 환경문제 중의 하나로 화석 연료를 사용한 내연 기관에서 배출되는 가스의 유해성분이 대기를 오염시키는 문제가 대두되고 있으며, 그 규제 또한 해를 거듭할 수록 강화되고 있다.One of the environmental issues that is currently gaining global attention is that the harmful components of gases emitted from internal combustion engines using fossil fuels are polluting the air, and regulations are being tightened year after year.
이러한 배출가스의 규제중에 현재 가장 엄격한 기준은 미국의 CARB(California Air Resources Board)의 ULEV(Ultra Low Emission Vehicle) 프로그램으로 97년도부터 LEV(Low Emission Vehicle) 및 ULEV(Ultra Low Emission Vehicle) 규제가 미국을 중심으로 시행될 예정이며, 세계 선진 여러국에서도 이에 준하는 규제를 시행하려 하고 있다. 따라서 이러한 지역에 자동차를 수출하기 위해서는 각 규제를 만족하지 않으면 안된다.Currently, the strictest standard for these emissions is the California Low Resources Vehicle (ULEV) program of the California Air Resources Board (CARB) in the United States.Low, the Low Emission Vehicle (LEV) and Ultra Low Emission Vehicle (ULEV) regulations have been It is planned to be implemented around the world, and many countries in the world are trying to implement the same regulations. Therefore, in order to export cars to these areas, each regulation must be satisfied.
자동차의 배출가스중의 유해성분은 미연 탄화수소계, 일산화탄소계, 산화질소계가 주를 이루고 있으며, 현재 자동차에 부착되어 있는 삼원 촉매로는 이러한 유해성분 특히 미연 탄화수소와 일산화탄소를 상술한 규제에 만족하도록 정화시키기 어려운 문제점이 있었다.Most of the harmful components in the exhaust gas of automobiles are mainly unburned hydrocarbons, carbon monoxide, and nitrogen oxides. The three-way catalysts currently attached to automobiles purify such harmful components, especially unburned hydrocarbons and carbon monoxide, to satisfy the above regulations. There was a problem that was difficult to make.
이러한 문제점은 미연 탄화수소와 일산화탄소의 전체 배출량의 약 90%이상이 엔진의 시동초기(시동 후 30초 이내)에 발생하는데 기인하는 것으로, 엔진의 시동초기에는 삼월촉매의 온도가 활성화 온도영역(약 300℃이상)에 도달하지 못하므로 유해 가스의 정화반응이 일어나지 못하고 그대로 대기중으로 배출되기 때문이다.This problem is due to the fact that more than 90% of the total emissions of unburned hydrocarbons and carbon monoxide are generated at the initial start of the engine (within 30 seconds after starting). This is because it does not reach above ℃) and the purification of harmful gases does not occur and is discharged to the atmosphere as it is.
본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 창출된 것으로서, 냉시동시 발생되는 배출가스중의 유해성분을 줄일 수 있는 내연기관의 배기 가스 정화장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the problems described above, and an object thereof is to provide an exhaust gas purification apparatus of an internal combustion engine that can reduce harmful components in exhaust gases generated during cold startup.
상술한 목적을 달성하기 위해 본 발명은, 메인촉매가 설치된 주배기관으로부터 분기되는 분기관과, 상기 분기관에 설치되며 연료통에서 증발된 증발가스를 점화연료로 사용하여 연료를 촉매연소시키는 촉매연소기와, 상기 분기관과 인접되는 주 배기관에 설치되며 상기 촉매 연소기로부터 열을 전달받아 초기 시동시 주배 기관을 통해 배출되는 배기 가스의 유해성분을 연소시키는 예비 촉매를 포함하는 내연 기관의 배기 가스 정화장치를 제공하는데 그 특징이 있다.In order to achieve the above object, the present invention provides a branched pipe branched from a main exhaust pipe provided with a main catalyst, and a catalytic combustion device installed at the branched pipe and catalytically burning fuel using evaporated gas evaporated from a fuel tank as an ignition fuel. And an exhaust gas purification device of an internal combustion engine installed in a main exhaust pipe adjacent to the branch pipe and receiving a heat from the catalytic combustor, and including a precatalyst for combusting harmful components of the exhaust gas discharged through the main exhaust pipe during initial startup. It is characterized by the provision.
본 발명의 바람직 한 다른 특징은, 상기 촉매 연소기가, 상기 분기관에 설치되는 촉매와, 상기 연료통에서 발생된 증발가스를 상기 촉매로 공급하고 점화시켜 이때 발생되는 열로 촉매를 가열하는 점화 장치가 부착된 파이롯트 버너와, 상기 연료통의 연료를 상기 가열된 촉매로 분사시켜 촉매연소시키는 연료펌프 및 분사노즐을 포함하는 점에 있다.According to another preferred aspect of the present invention, the catalyst combustor is provided with a catalyst installed in the branch pipe, and an ignition device for heating the catalyst with heat generated at this time by supplying and igniting the evaporated gas generated in the fuel container to the catalyst. And a fuel pump and an injection nozzle for injecting a catalytic burner into the heated catalyst and burning the catalyst in the heated catalyst.
이와 같은 본 발명에 의하면, 엔진 초기시동시에 발생되는 배기 가스중의 유해 성분을 줄일 수 있게 된다.According to the present invention as described above, it is possible to reduce the harmful components in the exhaust gas generated at engine initial start-up.
이하 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세하게 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 발명에 따른 내연 기관의 배기 가스 정화장치(1)를 개략적으로 도시한 것으로서, 엔진(2)과 연결된 주배기관(3)의 단부에 메인촉매(삼원촉매: 4)가 설치되고, 엔진(2)과 메인촉매(4) 사이의 주배기관(3)에는 이와 연통되는 분기관(5)이 형성된다.FIG. 1 schematically shows an exhaust gas purifying apparatus 1 of an internal combustion engine according to the present invention, wherein a main catalyst (three-way catalyst: 4) is installed at an end of a main exhaust pipe 3 connected to an engine 2, A branch pipe 5 is formed in the main exhaust pipe 3 between the engine 2 and the main catalyst 4.
그리고 분기관(5) 내부에는 엔진 초기시동시 발생되는 배출 가스중의 유해성분을 정화시키기 위한 촉매연소기(10)가 설치되고, 분기관(5)과 인접되는 주배기관(3)에는 상술한 촉매연소기(10)로 부터 열을 전달받아 초기시동시 주배기관(3)을 통해 배출되는 배기가스의 유해성분을 연소시키는 예비촉매(6)가 설치 된다.In addition, the branch pipe (5) is provided with a catalytic combustor (10) for purifying harmful components in the exhaust gas generated during engine start-up, and the main exhaust pipe (3) adjacent to the branch pipe (5) described above The precatalyst 6 is installed to receive heat from the combustor 10 and to burn harmful components of the exhaust gas discharged through the main exhaust pipe 3 at initial startup.
그리고 촉매연소기(10)는, 분기관(5)에 설치되는 촉매(11)와, 연료통(12)에서 발생된 증발가스를 분기관(5)에 설치된 촉매(11)로 공급하고 점화시켜 이때 발생되는 열로 촉매(11)를 가열하는 점화장치(14)가 부착된 파이롯트 버너(13)와, 연료통(12)의 연료를 상기 가열된 촉매(11)로 분사시켜 촉매연소시키는 연료펌프(15) 및 분사 노줄(16)을 구비한다.In addition, the catalyst combustor 10 supplies the catalyst 11 installed in the branch pipe 5 and the boil-off gas generated in the fuel cell 12 to the catalyst 11 installed in the branch pipe 5 and ignited at this time. A pilot burner 13 having an ignition device 14 for heating the catalyst 11 with heat to be heated, a fuel pump 15 for injecting the fuel of the fuel container 12 into the heated catalyst 11 for catalytic combustion; The injection row 16 is provided.
그리고 분기관(5)의 일측에는 엔진 시동시 함께 동작되어 공기를 분기관(5)으로 공급하는 송풍기(blower : 17)가 설치된다.And one side of the branch pipe (5) is provided with a blower (blower: 17) which is operated together at the start of the engine to supply air to the branch pipe (5).
이와 같이 구성된 본 발명에 따른 내연 기관의 배기 가스 정화 장치는, 엔진 초기시동시에 동작되어 배출가스중의 유해 성분을 정화시키고, 주배 기관에 설치된 메인촉매가 활성화온도 영역에 도달되면 동작이 중단되게 된다.The exhaust gas purification apparatus of the internal combustion engine according to the present invention configured as described above is operated at the initial start of the engine to purify harmful components in the exhaust gas, and the operation is stopped when the main catalyst installed in the main exhaust pipe reaches the activation temperature range. .
먼저 엔진(2)의 시동과 함께 분기관(5)에 설치된 촉매 연소기(10)가 동작되어 연소열을 주배기관(3)에 설치된 예비촉매(6)로 전달함으로써 예비촉매(6)의 온도를 활성화온도 영역으로 도달시켜 주배기관(3)을 통해 배출되는 배기가스중의 유해성분을 연소시켜 배기 가스를 정화시키게 된다.First, with the start of the engine 2, the catalytic combustor 10 installed in the branch pipe 5 is operated to transfer the combustion heat to the precatalyst 6 installed in the main exhaust pipe 3 to activate the temperature of the precatalyst 6. By reaching the temperature range, the harmful components in the exhaust gas discharged through the main exhaust pipe 3 are burned to purify the exhaust gas.
즉, 엔진(2)의 시동과 함께 촉매연소기(10)의 파이롯트 버너(13)에 부착된 점화장치(14)가 동작되어 연료를(12)에 증발되어 있던 증발 가스를 파이릇트 버너 (13)로 공급하여 점화시키게 된다.That is, with the start of the engine 2, the ignition device 14 attached to the pilot burner 13 of the catalytic combustor 10 is operated so that the evaporated gas that has been evaporated in the fuel 12 is converted into the pilot burner 13. To ignite.
그리고 이때 발생된 고온의 연소열에 의해 분기관(5)에 설치된 촉매 (11)의 온도가 상승하게 되고, 촉매 (11)의 온도가 활성화 온도 영역에 도달하면, 연료펌프(15)가 동작하여 연료를(12)의 연료를 분사노즐(16)을 통해 활성화온도 영역에 도달한 촉매(11)로 분사 시켜 연소시키게 된다.And the temperature of the catalyst 11 installed in the branch pipe 5 rises by the high temperature combustion heat which generate | occur | produced at this time, and when the temperature of the catalyst 11 reaches the activation temperature range, the fuel pump 15 will operate and fuel The fuel of 12 is injected through the injection nozzle 16 to the catalyst 11 reaching the activation temperature region and burned.
따라서 본 발명에서는 배기규제 대상이 되는 연료를(12)에서 증발된 증발가스를 촉매연소기 (10)의 점화연료로 사용하도록 되어 있으므로, 증발가스를 정화하기 위한 별도의 정화장치가 필요없기 때문에 경제적이고도 효율적인 이점이 있다.Therefore, in the present invention, since the evaporated gas evaporated from the fuel 12 to be used as the ignition fuel of the catalytic combustor 10 is used in the present invention, an additional purification device for purifying the evaporated gas is not required. There is an efficient advantage.
또한 촉매연소기(10)의 촉매(11)가 활성화온도 영역으로 도달한 상태에서 연료를 분사하도록 되어 있으므로, 촉매연소기(10)에 의한 연료의 연소시 발생되는 유해성분을 줄일 수 있게 된다.In addition, since the fuel is injected in a state in which the catalyst 11 of the catalytic burner 10 reaches the activation temperature region, it is possible to reduce harmful components generated during combustion of the fuel by the catalytic burner 10.
또한 촉매 연소기(10)가 주배기관에 설치되지 않고 분기관에 설치되어 있으므로, 차후 주행중 엔진 배기의 고열을 직접 전달받지 않게 됨에 따라 촉매 연소기의 수명이 연장되게 된다.In addition, since the catalytic combustor 10 is not installed in the main exhaust pipe but installed in the branch pipe, the life of the catalytic combustor is extended as the high heat of the engine exhaust is not directly transmitted during subsequent driving.
그리고 엔진(2)의 시동과 함께 송풍기(17)가 동작되어 공기를 분기관(5)으로 공급하도록 되어 있으므로, 촉매 연소시 발생되는 유해 성분인 미연 탄화수소 및 일산화탄소 등의 산화에 필요한 산소를 공급할 수 있게 되어 정화 효율이 더욱 향상 되게 된다.In addition, since the blower 17 is operated to start the engine 2 and supplies air to the branch pipe 5, oxygen necessary for oxidation of unburned hydrocarbons and carbon monoxide, which are harmful components generated during catalytic combustion, can be supplied. The purification efficiency is further improved.
그리고 촉매연소기(10)로부터 발생된 열은 주배기관(3)에 설치된 예비촉매(6)로 전달되어 예비촉매(6)의 온도를 활성화온도 영역으로 상승시키고, 활성화온도 영역에 도달한 예비촉매(6)는 엔진(2)의 배출가스 중의 유해성분을 촉매연소시켜 배기가스를 정화시키게 된다.The heat generated from the catalytic combustor 10 is transferred to the precatalyst 6 installed in the main exhaust pipe 3 so as to raise the temperature of the precatalyst 6 to the activation temperature region and reach the activation temperature region ( 6) catalytic combustion of harmful components in the exhaust gas of the engine 2 to purify the exhaust gas.
이때 촉매연소기(10)로 부터 발생된 열은 송풍기(17)로 부터 공급된 공기에 의해 빠르게 예 비촉매(6)로 전달되게 되므로, 엔진 냉시 동시에 발생되는 배출가스 중의 유해 성분을 빠르게 정화할 수 있게 된다.At this time, since the heat generated from the catalytic combustor 10 is quickly transferred to the precatalyst 6 by the air supplied from the blower 17, it is possible to quickly purify the harmful components in the exhaust gas generated at the same time as the engine cold. Will be.
그리고 일정시간이 경과하여 메인촉매(4)가 활성화영역에 도달하게 되면, 촉매연소기 (10)로의 연료공급과 송풍기(17)의 동작이 중단되고, 활성화영역에 도달된 메인촉매(4)가 배출가스 중의 유해성분을 정화시키게 된다.When the main catalyst 4 reaches the activation zone after a certain time, the fuel supply to the catalytic combustor 10 and the operation of the blower 17 are stopped, and the main catalyst 4 reaching the activation zone is discharged. Purifies harmful components in the gas.
이상에서 설명한 바와 같이 본 발명 내연 기관의 배기 가스 정화 장치에 의하면, 엔진 냉시동시 발생되는 배기 가스중의 유해 성분을 효율적으로 정화시킬 수 있게 된다.As described above, according to the exhaust gas purification apparatus of the internal combustion engine of the present invention, it is possible to efficiently purify the harmful components in the exhaust gas generated during engine cold start.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950067077A KR100191996B1 (en) | 1995-12-29 | 1995-12-29 | Device for purifying exhaust gas of an internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950067077A KR100191996B1 (en) | 1995-12-29 | 1995-12-29 | Device for purifying exhaust gas of an internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| KR970044307A KR970044307A (en) | 1997-07-26 |
| KR100191996B1 true KR100191996B1 (en) | 1999-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019950067077A KR100191996B1 (en) | 1995-12-29 | 1995-12-29 | Device for purifying exhaust gas of an internal combustion engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143412A1 (en) * | 2007-05-18 | 2008-11-27 | Sk Energy Co., Ltd. | An injector for regeneration of an exhaust gas purifying device |
| WO2009014275A1 (en) * | 2007-07-26 | 2009-01-29 | Sk Energy Co., Ltd. | Exhaust gas treatment system for low exhaust temperature vehicle using catalytic combustion type diesel injector |
| US11885251B2 (en) | 2022-05-25 | 2024-01-30 | Tenneco Automotive Operating Company Inc. | Selective catalytic reduction catalyst pre-heating burner assembly and method of controlling burner emissions |
-
1995
- 1995-12-29 KR KR1019950067077A patent/KR100191996B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008143412A1 (en) * | 2007-05-18 | 2008-11-27 | Sk Energy Co., Ltd. | An injector for regeneration of an exhaust gas purifying device |
| WO2009014275A1 (en) * | 2007-07-26 | 2009-01-29 | Sk Energy Co., Ltd. | Exhaust gas treatment system for low exhaust temperature vehicle using catalytic combustion type diesel injector |
| US11885251B2 (en) | 2022-05-25 | 2024-01-30 | Tenneco Automotive Operating Company Inc. | Selective catalytic reduction catalyst pre-heating burner assembly and method of controlling burner emissions |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970044307A (en) | 1997-07-26 |
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