KR100376857B1 - An improvement device of light off time of catalyst - Google Patents
An improvement device of light off time of catalyst Download PDFInfo
- Publication number
- KR100376857B1 KR100376857B1 KR10-2000-0081592A KR20000081592A KR100376857B1 KR 100376857 B1 KR100376857 B1 KR 100376857B1 KR 20000081592 A KR20000081592 A KR 20000081592A KR 100376857 B1 KR100376857 B1 KR 100376857B1
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- Prior art keywords
- exhaust gas
- catalytic converter
- supply means
- light
- catalyst
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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
- F01N3/18—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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
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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
- F01N2240/16—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 an electric heater, i.e. a resistance heater
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
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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 발명은 자동차 엔진에서 발생되는 배기가스의 정화에 사용되는 배기가스 정화 장치의 촉매에 관한 것으로서,The present invention relates to a catalyst of an exhaust gas purification apparatus used for purification of exhaust gas generated in an automobile engine.
촉매컨버터의 상류측 배기관을 통과하는 배기가스에 열을 공급할 수 있도록 된 열공급수단과, 상기 열공급수단을 통과한 배기가스의 온도를 측정하도록 촉매컨버터의 상류측에 설치된 온도센서와, 상기 온도센서의 신호를 받음과 아울러 엔진회전수센서 및 차속센서의 신호를 받아 상기 열공급수단을 제어하는 컨트롤러로 구성된 촉매의 라이트오프타임 개선장치를 제공하여,A heat supply means capable of supplying heat to the exhaust gas passing through the upstream exhaust pipe of the catalytic converter, a temperature sensor installed upstream of the catalytic converter to measure the temperature of the exhaust gas passing through the heat supply means, In addition to receiving a signal from the engine speed sensor and the vehicle speed sensor to provide a light off time improving device of the catalyst consisting of a controller for controlling the heat supply means,
엔진의 냉간시동시에도 능동적으로 전기히터를 작동시켜서 배기가스가 충분한 온도를 가지고 촉매컨버터에 유입되도록 함으로써, 라이트오프타임을 단축시키고 촉매컨버터가 즉시 효율적인 정화 성능을 발휘할 수 있도록 한다.By actively operating the electric heater during cold start of the engine, the exhaust gas is introduced into the catalytic converter at a sufficient temperature, thereby shortening the light off time and enabling the catalytic converter to immediately exhibit efficient purification performance.
Description
본 발명은 자동차 엔진에서 발생되는 배기가스의 정화에 사용되는 배기가스정화 장치의 촉매에 관한 것으로서, 보다 상세하게는 엔진의 시동 초기에 발생되는 라이트오프타임(LIGHT OFF TIME)을 개선하도록 하기 위한 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalyst of an exhaust gas purifying apparatus used for purifying exhaust gas generated in an automobile engine, and more particularly, to improve a light off time generated at an initial start of an engine. It is about.
일반적으로 엔진은 실린더와 실린더 헤드 및 상기 실린더 내에서 왕복 운동하는 피스톤의 사이에 형성되는 연소실에서 연료를 연소시켜 발생된 폭발력을 상기 피스톤에 연결된 커넥팅 로드를 통해 크랭크샤프트를 회전시킴으로서 열에너지를 기계적인 회전력으로 변환하는 장치이다.In general, an engine rotates a crankshaft through a connecting rod connected to the piston to explode the force generated by burning fuel in a combustion chamber formed between a cylinder and a cylinder head and a piston reciprocating in the cylinder, thereby rotating mechanical energy. To convert.
상기한 엔진에는 연소된 혼합기를 배기하는 배기장치가 요구되는 바, 상기 배기장치는 도 1에 도시된 바와 같이 연소실과 연결된 배기매니폴드에 연결되어 있는 배기관(50)과, 상기한 배기관(50)과 연결되어 있는 촉매컨버터(51) 및 소음기(52) 등으로 구성되어 있다.The engine requires an exhaust device for exhausting the combusted mixer. The exhaust device includes an exhaust pipe 50 connected to an exhaust manifold connected to the combustion chamber as shown in FIG. 1, and the exhaust pipe 50. And a catalytic converter 51 and a silencer 52 connected to each other.
여기서, 상기한 바와 같은 배기장치를 통해 대기중으로 배출되는 배기 가스에는 탄화수소(HC), 일산화탄소(CO), 질소 화합물(NOx), 아황산 가스등이 포함되어 대기 오염이 유발되기 때문에 이를 제거한 상태로 대기중에 방출하도록 규제되고 있다.Here, the exhaust gas discharged into the atmosphere through the exhaust device as described above includes hydrocarbons (HC), carbon monoxide (CO), nitrogen compounds (NOx), sulfurous acid gas, and the like, which causes air pollution, and thus removes them into the atmosphere. It is regulated to release.
상기와 같이 유해한 배기 가스를 정화하기 위한 장치로서 상기한 촉매컨버터(51)가 사용되는 바, 도 2에 도시된 바와 같이 촉매컨버터 케이스의 내측에 설치되는 촉매 담체(substrate)(53)에 백금(Pt)과 소량의 로듐(Rh)을 혼합한 것이 부착되어 배기가스를 정화하도록 하며, 상기 백금은 주로 일산화탄소와 탄화수소의 산화 작용에 사용되고 로듐은 주로 질소 화합물의 환원 작용을 위해서 사용된다.As described above, the catalytic converter 51 is used as a device for purifying harmful exhaust gas. As illustrated in FIG. 2, the catalyst converter 51 is disposed on the catalyst carrier 53 installed inside the catalytic converter case. A mixture of Pt) and a small amount of rhodium (Rh) is attached to purify the exhaust gas. Platinum is mainly used for the oxidation of carbon monoxide and hydrocarbons, and rhodium is mainly used for the reduction of nitrogen compounds.
그런데, 상기한 바와 같은 촉매컨버터(51)는 온도가 일정한 수준에 도달하기 전까지는 그 성능이 충분히 발휘되지 못하는바, 엔진이 시동되어 촉매가 제 기능을 발휘할 때까지의 시간을 라이트오프타임(LIGHT OFF TIME)이라 하며, 실제 엔진의 경우 이 라이트오프타임이 상당히 길어서 배출가스가 정화되지 못하고 배출되는 심각한 문제점이 있다.However, the catalytic converter 51 as described above does not exhibit sufficient performance until the temperature reaches a certain level, so that the time until the engine is started and the catalyst is fully functional is measured. OFF TIME), and in the case of an actual engine, the light off time is considerably long, and thus there is a serious problem in that the exhaust gas is not purified.
이에 본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 엔진의 냉간시동시에도 라이트오프타임을 단축시켜서 촉매컨버터가 즉시 효율적인 정화 성능을 발휘할 수 있도록 함으로써, 엔진 시동초기의 배기가스 정화가 보다 효율적으로 이루어질 수 있도록 한 촉매의 라이트오프타임 개선장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, by reducing the light off time even during cold start of the engine to enable the catalytic converter to immediately exhibit an efficient purification performance, purifying the exhaust gas at the beginning of the engine start It is an object of the present invention to provide an apparatus for improving the light off time of a catalyst that can be made more efficiently.
도 1은 일반적인 자동차 배기장치의 사시도,1 is a perspective view of a typical vehicle exhaust device,
도 2는 일반적인 촉매컨버터의 구조도,2 is a structural diagram of a typical catalytic converter,
도 3은 본 발명에 의한 촉매의 라이트오프타임 개선장치의 구성도,3 is a block diagram of an apparatus for improving a light off time of a catalyst according to the present invention;
도 4는 도 3의 전기히터의 단면도,4 is a cross-sectional view of the electric heater of FIG.
도 5는 본 발명 촉매의 라이트오프타임 개선장치의 작동 순서도이다.5 is a flowchart illustrating the operation of the apparatus for improving light off time of the catalyst of the present invention.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
1, 51: 촉매컨버터 3: 배기관1, 51: catalytic converter 3: exhaust pipe
5: 전기히터 7: 발열로드5: electric heater 7: heating rod
8: 온도센서 9: 트랜스포머8: Temperature Sensor 9: Transformer
11: ECU 13: 차속센서11: ECU 13: vehicle speed sensor
15: 엔진회전수센서15: engine speed sensor
상기한 바와 같은 목적을 달성하기 위한 본 발명 촉매의 라이트오프타임 개선장치는 촉매컨버터의 상류측 배기관을 통과하는 배기가스에 열을 공급할 수 있도록 된 열공급수단과, 상기 열공급수단을 통과한 배기가스의 온도를 측정하도록 촉매컨버터의 상류측에 설치된 온도센서와, 상기 온도센서의 신호를 받음과 아울러 엔진회전수센서 및 차속센서의 신호를 받아 상기 열공급수단을 제어하는 컨트롤러로 구성된 것을 특징으로 한다.The apparatus for improving light off time of the catalyst according to the present invention for achieving the above object includes a heat supply means capable of supplying heat to exhaust gas passing through an exhaust pipe upstream of the catalytic converter, and an exhaust gas passing through the heat supply means. And a temperature sensor installed upstream of the catalytic converter to measure the temperature, and a controller for receiving the signals of the temperature sensor and receiving the signals of the engine speed sensor and the vehicle speed sensor to control the heat supply means.
이하, 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 3 및 도 4는 본 발명에 의한 촉매의 라이트오프타임 개선장치의 일 실시예를 도시한 것으로서, 촉매컨버터(1)의 상류쪽에 연결된 배기관(3)에는 상기 열공급수단인 전기히터(5)가 설치되어 있는바, 이는 배기관(3)의 외경이 80mm이고 내경이 75mm인 경우에 그 외경이 80mm로서 상기 배기관(3)에 수직하는 방향으로 설치되는 12개의 직경 5mm짜리 발열로드(7)로 구성되어 있다(도 4의 단면도 참조).3 and 4 illustrate an embodiment of the apparatus for improving the light off-time of the catalyst according to the present invention. In the exhaust pipe 3 connected to the upstream side of the catalytic converter 1, the electric heater 5 as the heat supply means is provided. When the outer diameter of the exhaust pipe (3) is 80mm and the inner diameter is 75mm, it is composed of twelve 5mm diameter heating rods 7 having a diameter of 80mm and installed in a direction perpendicular to the exhaust pipe (3). (See sectional drawing of FIG. 4).
상기 발열로드(7)는 트랜스포머(9)에 연결되어 이로부터 전원을 공급받아 스스로 발열하도록 되어 있다.The heat generating rod 7 is connected to the transformer 9 and is supplied with power from the heat generating rod 7 to generate heat by itself.
상기 배기관(3)에 설치된 발열로드(7)와 촉매컨버터(1)의 사이에는 상기 발열로드(7)를 통과하여 촉매컨버터(1)로 입력되는 배기가스의 온도를 측정하기 위한 온도센서(8)가 설치되어 있고 상기 온도센서(8)는 컨트롤러인 ECU(11)에 연결되어 상기 배기가스의 온도를 전달하도록 되어 있다.A temperature sensor 8 for measuring the temperature of the exhaust gas passing through the heat generating rod 7 and input to the catalytic converter 1 between the heat generating rod 7 and the catalytic converter 1 installed in the exhaust pipe 3. Is installed and the temperature sensor 8 is connected to the ECU 11, which is a controller, to transmit the temperature of the exhaust gas.
아울러, 상기 ECU(11)에는 차속센서(13)와 엔진회전수센서(15)가 연결되어 이들로부터의 신호를 받는 한편 상기 온도센서(8)로부터의 신호를 받아 상기 트랜스포머(9)를 제어함으로써, 상기 전기히터(5)인 발열로드(7)에서 발열되는 열량을 제어할 수 있도록 되어 있다.In addition, the ECU 11 is connected to the vehicle speed sensor 13 and the engine speed sensor 15 to receive a signal from them while receiving a signal from the temperature sensor 8 to control the transformer 9 The amount of heat generated by the heat generating rod 7, which is the electric heater 5, can be controlled.
상기한 바와 같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.
엔진의 냉간 시동시에는 엔진의 온도는 물론, 배기가스를 정화하는 역할을 하는 촉매컨버터(1)의 온도도 낮아서 정상적인 배기가스정화 작용을 하지 못하는 바, 상기 컨트롤러인 ECU(11)는 상기 온도센서(8)로 배기가스의 온도를 측정함과 동시에 엔진회전수센서(15)로부터 엔진의 회전수를 입력받고 차속센서(13)로부터 차속이 0인지를 입력받아 적절한 판단에 따라 상기 트랜스포머(9)를 제어한다.During cold start of the engine, the temperature of the catalytic converter 1, which serves to purify the exhaust gas as well as the engine temperature, is also low, thus preventing normal exhaust gas purification. (8) measure the temperature of the exhaust gas and at the same time input of the engine speed from the engine speed sensor 15 and input of whether the vehicle speed is 0 from the vehicle speed sensor 13 according to the appropriate judgment the transformer 9 To control.
즉, 도 5를 참조하여 보면 차속이 0인 경우에는 다시 엔진회전수가 0이고 점화스위치가 0N인지를 판단하여 엔진이 시동 직후의 상태임이 판단되면 배기온도가 규정치 이상인지를 판단하여 규정치 이하인 경우에는 상기 트랜스포머(9)를 작동시켜 상기 발열로드에서 발열작용이 일어나도록 하여 촉매컨버터(1)로 유입되는 배기가스의 온도를 높임으로써, 촉매에서 정화작용이 원활하게 이루어질 수 있는 온도상태를 구현한다.That is, referring to FIG. 5, when the vehicle speed is 0, when the engine speed is 0 again and the ignition switch is 0N, it is determined that the engine is immediately after starting. By operating the transformer 9 so that exothermic action occurs in the exothermic rod to increase the temperature of the exhaust gas flowing into the catalytic converter 1, a temperature condition in which the purifying action can be performed smoothly in the catalyst is realized.
상기와 같은 상태에서 만약 배기온도가 규정치 이상이라고 판단되면 물론, 상기 트랜스포머(9)를 오프시킨다.In the above state, if the exhaust temperature is determined to be above the prescribed value, of course, the transformer 9 is turned off.
다음, 차속이 0이면서 엔진회전수가 0이 아니고 점화스위치가 OFF가 아닌 경우에는 차량이 시동직후 상태가 아닌 것으로 판단하여 상기 트랜스포머(9)를 오프시킨다.Next, when the vehicle speed is 0 and the engine speed is not 0 and the ignition switch is not OFF, it is determined that the vehicle is not immediately after starting, and the transformer 9 is turned off.
또한, 차속이 0가 아닌 경우에는 물론 점화스위치가 작동되었는지를 판단할 필요는 없는 것이므로 곧바로 배기가스의 온도가 규정치 이상인가의 판단에 따라서 상기 트랜스포머(9)를 온 오프 시킴으로써, 촉매컨버터(1)에 공급되는 배기가스의 온도는 일정한 수준이 유지되도록 한다.In addition, when the vehicle speed is not 0, of course, it is not necessary to determine whether the ignition switch is activated. Therefore, the converter 9 is turned on and off in accordance with the determination whether the exhaust gas temperature is higher than the prescribed value. The temperature of the exhaust gas supplied to the air is maintained at a constant level.
이상 설명한 바와 같이 본 발명에 의하면, 엔진의 냉간시동시에도 능동적으로 전기히터를 작동시켜서 배기가스가 충분한 온도를 가지고 촉매컨버터에 유입되도록 함으로써, 라이트오프타임을 단축시키고 촉매컨버터가 즉시 효율적인 정화 성능을 발휘할 수 있도록 한다.As described above, according to the present invention, even when the engine is cold-started, the electric heater is actively operated so that the exhaust gas flows into the catalytic converter at a sufficient temperature, thereby shortening the light off time and providing the catalytic converter with an efficient purification performance immediately. Make it work.
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2000-0081592A KR100376857B1 (en) | 2000-12-26 | 2000-12-26 | An improvement device of light off time of catalyst |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2000-0081592A KR100376857B1 (en) | 2000-12-26 | 2000-12-26 | An improvement device of light off time of catalyst |
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| Publication Number | Publication Date |
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| KR20020052352A KR20020052352A (en) | 2002-07-04 |
| KR100376857B1 true KR100376857B1 (en) | 2003-03-19 |
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| KR102366583B1 (en) | 2020-10-08 | 2022-02-23 | 한국화학연구원 | Heating Carrier and Exhaust Gas Reducing Carrier in which the Heating Carrier is formed |
| KR20230158823A (en) | 2022-05-12 | 2023-11-21 | 한국화학연구원 | Method for preparing an oxidation catalyst module using electrodeposition and the catalyst thereby |
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