KR20210001349A - Automobile exhaust gas treatment system - Google Patents
Automobile exhaust gas treatment system Download PDFInfo
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- KR20210001349A KR20210001349A KR1020190077321A KR20190077321A KR20210001349A KR 20210001349 A KR20210001349 A KR 20210001349A KR 1020190077321 A KR1020190077321 A KR 1020190077321A KR 20190077321 A KR20190077321 A KR 20190077321A KR 20210001349 A KR20210001349 A KR 20210001349A
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- 238000006555 catalytic reaction Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 60
- 230000003197 catalytic effect Effects 0.000 description 22
- 238000002485 combustion reaction Methods 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
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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
- F01N3/101—Three-way catalysts
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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
- F01N9/00—Electrical control of exhaust gas treating 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
- F01N2240/16—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
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1404—Exhaust gas temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
본 발명은 자동차의 배기가스를 처리하는 기술에 관한 것이다.The present invention relates to a technology for treating exhaust gas of an automobile.
흡기 장치에 의해 엔진으로 들어온 공기는 엔진의 연소 후 배기장치를 통해 공기 중으로 배출된다. 이러한 엔진의 연소과정에서 생성되는 배기가스는 높은 압력과 고온으로 그대로 방출하게 되는데 연소 과정에서 생성되는 질소산화물, 일산화탄소, 탄화수소 같은 대기 오염물질을 포함하고 있어 방출 전 여러 조치가 필요하다.The air introduced into the engine by the intake device is discharged into the air through the exhaust system after combustion of the engine. Exhaust gas generated in the combustion process of such an engine is discharged as it is at high pressure and high temperature, and it contains air pollutants such as nitrogen oxides, carbon monoxide, and hydrocarbons generated during the combustion process, so several measures are required before discharge.
엔진에서 발생된 배기가스는 배기 매니폴드에 의해 합쳐지고이후 배기관을 통해 촉매변환기로 이동하는데, 촉매변환기는 질소산화물, 일산화탄소, 탄화수소 같은 인체에 유해한 오염 물질을 무해한 성분으로 전환되도록 도와준다.The exhaust gases generated from the engine are combined by the exhaust manifold and then transferred to the catalytic converter through the exhaust pipe, which helps convert pollutants harmful to the human body such as nitrogen oxides, carbon monoxide, and hydrocarbons into harmless components.
촉매 변환기는 알루미늄을 베이스로 대부분 백금과 로듐, 팔라듐과 같은 희토류 금속을 추가한 물질을 촉매로 사용한다. 이러한 촉매가 설치된 촉매변환기를 배기가스가 통과하며, 배기가스 내 3대 오염 물질의 화학반응을 통해 이산화탄소, 물, 질소와 같은 무해한 물질로 전환시킨다. 세 가지 물질의 화학 반응을 일으키기 때문에 삼원 촉매라고도 부른다.Catalytic converters use aluminum-based catalysts, mostly platinum and rare earth metals such as rhodium and palladium. Exhaust gas passes through the catalytic converter equipped with such a catalyst, and it is converted into harmless substances such as carbon dioxide, water, and nitrogen through a chemical reaction of the three major pollutants in the exhaust gas. It is also called a three-way catalyst because it causes a chemical reaction of three substances.
현재 배기가스에 대한 법규가 강화됨에 따라서 촉매변환기의역할이 더욱 중요해졌다. 촉매변환기에서의 3원촉매 반응이 촉진되기 위해서는 배기가스가 일정온도 이상일 필요가 있다.The role of catalytic converters has become more important as the current regulations on exhaust gas have been strengthened. In order to promote the three-way catalytic reaction in the catalytic converter, the exhaust gas needs to be above a certain temperature.
도 5에 도시된 바와 같이, 질소산화물, 일산화탄소, 탄화수소는 배기가스의 온도가 400°C 이상일 때 정화율이 가장 높다. 그런데, 초기 시동 또는 콜드 스타트(Cold Start)인 경우 촉매의 온도가 매우 낮아 촉매반응이 잘 이루어지지 않는다. 이를 해결하기 위하여 공회전(idle rpm)을 초기 시동 후 1500rpm이상 또는 콜드 스타트 시 2000rpm이상으로 올리고, 이때 배출되는 배기가스를 이용해 촉매 반응온도를 높이는 방식을 적용하고 있다.As shown in FIG. 5, nitrogen oxides, carbon monoxide, and hydrocarbons have the highest purification rate when the exhaust gas temperature is 400°C or higher. However, in the case of initial start-up or cold start, the temperature of the catalyst is very low, so that the catalytic reaction is difficult. To solve this problem, the idle rpm is increased to 1500 rpm or more after initial start or 2000 rpm or more when cold start, and a method of increasing the catalyst reaction temperature by using exhaust gas emitted at this time is applied.
이러한 방식은 촉매의 예열이 오래 걸리고, 그 시간 동안은 촉매반응이 제대로 이루어지지 않아 많은 양의 미연소 배출가스가 배출되며, 높은 RPM 사용으로 인하여 연료 또한 많이 소비되는 문제가 있다.In this method, preheating of the catalyst takes a long time, and during that time, a large amount of unburned exhaust gas is discharged because the catalytic reaction is not performed properly, and a large amount of fuel is consumed due to the use of high RPM.
이에, 본 발명의 발명자는 이러한 종래 방식의 문제점을 해결하기 위하여 오랫동안 연구하고 시행착오를 거친 끝에 본 발명을 완성하기에 이르렀다.Accordingly, the inventors of the present invention came to complete the present invention after long research and trial and error in order to solve the problems of this conventional method.
본 발명은 초기 시동시 또는 콜드 스타트인 경우 촉매변환기의 3원촉매반응을 효율적으로 촉진할 수 있는 자동차 배기가스 처리시스템을 제공하고자 한다.An object of the present invention is to provide a vehicle exhaust gas treatment system capable of efficiently accelerating a three-way catalytic reaction of a catalytic converter during initial start-up or cold start.
한편, 본 발명의 명시되지 않은 또 다른 목적들은 하기의 상세한 설명 및 그 효과로부터 용이하게 추론할 수 있는 범위 내에서 추가적으로 고려될 것이다.Meanwhile, other objects not specified of the present invention will be additionally considered within a range that can be easily deduced from the following detailed description and effects thereof.
본 발명의 실시예에 따라서, 배기가스의 온도를 상승시켜 배기가스의 3원촉매반응을 촉진하는 자동차 배기가스 처리시스템으로서,According to an embodiment of the present invention, as a vehicle exhaust gas treatment system for promoting a three-way catalytic reaction of the exhaust gas by increasing the temperature of the exhaust gas,
배기 매니폴드의 단부에 결합되어 배기가스의 흐름방향을 조절하는 배플판; 및A baffle plate coupled to an end of the exhaust manifold to control a flow direction of exhaust gas; And
상기 배플판을 통과하는 배기가스의 온도를 상승시키기 위하여 상기 배플판에 결합되어 상기 배플판에 열을 공급하는 열공급부를 포함하는 것을 특징으로 하는,It characterized in that it comprises a heat supply unit coupled to the baffle plate to supply heat to the baffle plate in order to increase the temperature of the exhaust gas passing through the baffle plate,
자동차 배기가스 처리시스템을 제공한다.It provides automobile exhaust gas treatment system.
본 발명의 일 실시예에 따라서 상기 열공급부는,According to an embodiment of the present invention, the heat supply unit,
온도가 대략 1000˚C까지 상승할 수 있는 예열플러그를 포함할 수 있다.It may include a preheating plug that can raise the temperature to approximately 1000°C.
본 발명의 일 실시예에 따라서 엔진의 온도를 측정하는 온도측정부; 및A temperature measuring unit for measuring the temperature of the engine according to an embodiment of the present invention; And
상기 온도측정부에서 측정된 온도에 따라 상기 열공급부의 온/오프(On/Off)를 제어하는 제어부를 더 포함할 수 있다.It may further include a control unit for controlling the on / off (On / Off) of the heat supply unit according to the temperature measured by the temperature measuring unit.
본 발명의 일 실시예에 따라서 상기 배플판을 거친 배기가스가 통과하는 배기관에 형성되어 상기 배기관의 온도를 감지하고 이를 상기 제어부에 전달하는 온도감지부를 더 포함할 수 있다.According to an embodiment of the present invention, it may further include a temperature sensing unit formed in an exhaust pipe through which exhaust gas passing through the baffle plate passes, senses the temperature of the exhaust pipe, and transmits the temperature to the control unit.
본 발명의 일 실시예에 따라서 상기 배플판은,According to an embodiment of the present invention, the baffle plate,
상기 예열플러그의 고온에 대한 내열성을 가지는 재질을 포함할 수 있다.It may include a material having heat resistance to high temperature of the preheating plug.
본 발명에 따른 자동차 배기가스 처리시스템을 이용하면, 초기 시동시나 콜드 스타트인 경우에도 촉매변환기의 3원촉매반응이 촉진되어 외부로 배출되는 배기가스 내 오염물질을 크게 줄일 수 있게 된다.When the vehicle exhaust gas treatment system according to the present invention is used, the three-way catalytic reaction of the catalytic converter is promoted even during initial start-up or cold start, so that pollutants in the exhaust gas discharged to the outside can be greatly reduced.
한편, 여기에서 명시적으로 언급되지 않은 효과라 하더라도, 본 발명의 기술적 특징에 의해 기대되는 이하의 명세서에서 기재된 효과 및 그 잠정적인 효과는 본 발명의 명세서에 기재된 것과 같이 취급됨을 첨언한다.On the other hand, even if it is an effect not explicitly mentioned herein, it is added that the effect described in the following specification and its provisional effect expected by the technical features of the present invention are treated as described in the specification of the present invention.
도 1은 본 발명의 일 실시예에 따른 자동차 배기가스 처리시스템을 나타낸 개략도이다.
도 2는 본 발명의 일 실시예에 따른 예열플러그가 배플판에 결합된 것을 나타낸 도면이다.
도 3은 본 발명의 일 실시예에 따른 엔진의 온도 또는 배기관의 온도에 따라 제어부가 예열플러그의 전원을 조절하는 것을 나타낸 도면이다.
도 4는 본 발명의 일 실시예에 따른 엔진의 온도 또는 배기관의 온도에 따라 제어부가 예열플러그의 전원을 조절하는 것을 나타낸 순서도이다.
도 5는 배기가스 온도와 오염물질의 정화율에 관한 그래프이다.
첨부된 도면은 본 발명의 기술사상에 대한 이해를 위하여 참조로서 예시된 것임을 밝히며, 그것에 의해 본 발명의 권리범위가 제한되지는 아니한다.1 is a schematic diagram showing a vehicle exhaust gas treatment system according to an embodiment of the present invention.
2 is a view showing that a preheating plug according to an embodiment of the present invention is coupled to a baffle plate.
3 is a view showing that the control unit adjusts the power of the preheating plug according to the temperature of the engine or the temperature of the exhaust pipe according to an embodiment of the present invention.
4 is a flow chart showing that the control unit adjusts the power of the preheating plug according to the temperature of the engine or the temperature of the exhaust pipe according to an embodiment of the present invention.
5 is a graph showing exhaust gas temperature and purification rate of pollutants.
The accompanying drawings are exemplified by reference for understanding the technical idea of the present invention, and the scope of the present invention is not limited thereto.
본 발명을 설명함에 있어서 관련된 공지기능에 대하여 이 분야의 기술자에게 자명한 사항으로서 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략한다. In describing the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as matters obvious to those skilled in the art with respect to known functions related to the present invention, a detailed description thereof will be omitted.
본 출원에서 사용한 용어는 단지 특정한 실시예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아니다. 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 본 출원에서, "포함하다" 또는 "가지다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.
이하, 본 발명에 따른 자동차 배기가스 처리시스템의 실시예를 첨부도면을 참조하여 상세히 설명하기로 하며, 첨부 도면을 참조하여 설명함에 있어, 동일하거나 대응하는 구성 요소는 동일한 도면번호를 부여하고 이에 대한 중복되는 설명은 생략하기로 한다.Hereinafter, embodiments of a vehicle exhaust gas treatment system according to the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers and Redundant descriptions will be omitted.
엔진의 연소시 연소실의 온도는 매우 높으며 고출력 시, 1,000˚C 이상 상승하기도 한다. 이로 인해 연소 후 생성되는 배기가스의 온도 또한 대략 950˚C정도로 높으며 배기장치 또한 높은 온도에 노출된다. 엔진의 RPM 수나 여러 조건에 따라 다르지만 일반적으로 배기 매니폴드, 촉매변환기, 머플러를 지나가면서 온도가 낮아진다.During engine combustion, the temperature of the combustion chamber is very high, and at high power, it may rise more than 1,000˚C. Due to this, the temperature of the exhaust gas generated after combustion is also high, about 950˚C, and the exhaust system is also exposed to high temperatures. Although it depends on the number of RPMs of the engine and various conditions, the temperature generally decreases as it passes through the exhaust manifold, catalytic converter, and muffler.
도 5에서 알 수 있듯이, 촉매변환기에서 촉매반응이 활발히 진행되기 위해서는 배기가스의 온도가 대략 400˚C 이상이 유지되어야 한다. 그런데, 초기 시동이나 콜드 스타트에서는 이러한 배기가스의 온도를 만들어 낼 수 없다. 그래서 본 발명은 예열플러그 같은 추가적인 구성을 통하여 초기 시동이나 콜드 스타트의 경우에도 촉매변환기에서 3원촉매반응이 촉진될 수 있도록 배기가스의 온도를 급상승시키는 것이다.As can be seen from FIG. 5, in order for the catalytic reaction to actively proceed in the catalytic converter, the temperature of the exhaust gas must be maintained at approximately 400°C or higher. However, the temperature of the exhaust gas cannot be created during initial start or cold start. Therefore, the present invention is to rapidly increase the temperature of the exhaust gas so that the three-way catalytic reaction can be accelerated in the catalytic converter even in case of initial start or cold start through an additional configuration such as a preheating plug.
도 1은 본 발명의 일 실시예에 따른 자동차 배기가스 처리시스템을 나타낸 개략도이다. 도 1에 도시된 바와 같이, 본 발명에 따른 자동차 배기가스 처리시스템은 초기 시동이나 콜드 스타트의 경우 온도가 낮은 배기가스의 온도를 상승시켜 배기가스의 3원촉매반응을 촉진하기 위한 것으로서 배플판(B) 및 열공급부를 포함할 수 있다.1 is a schematic diagram showing a vehicle exhaust gas treatment system according to an embodiment of the present invention. As shown in Fig. 1, the vehicle exhaust gas treatment system according to the present invention is for accelerating the three-way catalytic reaction of the exhaust gas by increasing the temperature of the exhaust gas having a low temperature in case of initial start or cold start. B) and may include a heat supply.
배기 매니폴드(M)는 엔진(E)에서 연소에 의해 만들어진 배기가스가가장 먼저 통과하는 장치다. 배기 매니폴드(M)는 각 기통의 연소실과 연결된 다기관으로 연소실로부터 배출되는 배기가스를 원활하게 배기관(V)으로 전달하는 역할을 한다.The exhaust manifold (M) is the device through which the exhaust gas produced by combustion in the engine (E) first passes. The exhaust manifold (M) is a manifold connected to the combustion chamber of each cylinder and serves to smoothly transfer the exhaust gas discharged from the combustion chamber to the exhaust pipe (V).
배플판(B)은 배기 매니폴드(M)의 단부에 결합되어 배기관(V)으로 이동하는 배기가스의 흐름방향을 조절하거나 배기가스를 분산시키는 기능을 하는 것이다. 이때 배플판(B)은 사각형, 타원형, 원형 혹은 이들의 변형된 형태 중 어느 하나로 형성될 수 있다. 배플판(B)이 넓은 판 형상으로 형성되고, 이러한 배플판(B)이 고온으로 가열된다면 배기가스 또한 이러한 배플판(B)으로 인하여 온도가 상승하게 된다.The baffle plate (B) is coupled to the end of the exhaust manifold (M) to control the flow direction of the exhaust gas moving to the exhaust pipe (V) or to distribute the exhaust gas. At this time, the baffle plate B may be formed in any one of a square, an oval, a circle, or a modified shape thereof. If the baffle plate (B) is formed in a wide plate shape, and the baffle plate (B) is heated to a high temperature, the exhaust gas also increases in temperature due to the baffle plate (B).
열공급부는 예열플러그(G)를 포함할 수 있다. 본 발명에 따른 예열플러그(G)는 온도가 수초 내 대략 1000˚C까지 상승할 수 있도록 형성될 수 있다. 1000˚C까지 상승할 수 있는 고온의 예열플러그(G)가 배플판(B)을 데우고, 데워진 배플판(B)이 배기가스의 온도를 상승시키는 것이다.The heat supply unit may include a preheating plug (G). The preheating plug G according to the present invention may be formed so that the temperature can rise to approximately 1000°C within a few seconds. The high-temperature preheating plug (G), which can rise to 1000˚C, heats the baffle plate (B), and the heated baffle plate (B) raises the temperature of the exhaust gas.
도 2는 본 발명의 일 실시예에 따른 예열플러그(G)가 배플판(B)에 결합된 것을 나타낸 도면이다.2 is a view showing that the preheating plug (G) is coupled to the baffle plate (B) according to an embodiment of the present invention.
도 2에 도시된 바와 같이, 예열플러그(G)의 심지가 배플판(B)의 하부와 결합되어 예열플러그(G) 심지의 고온을 배플판(B)에 전달할 수 있다. 예열플러그(G)의 고온은 심지부분에 발생하기 때문에 이러한 예열플러그(G) 심지와 배플판(B)이 직접 면대면으로 결합함으로써 예열플러그(G) 심지의 고온을 직접 배플판(B)에 전달하는 것이다.As shown in FIG. 2, the wick of the preheating plug (G) is combined with the lower portion of the baffle plate (B) to transmit the high temperature of the wick of the preheating plug (G) to the baffle plate (B). Since the high temperature of the preheating plug (G) occurs in the wick, the preheating plug (G) wick and the baffle plate (B) are directly combined face-to-face to directly transfer the high temperature of the preheating plug (G) wick to the baffle plate (B). To deliver.
예열플러그(G)를 배기가스가 이동하는 공기 중에 배치하는 것보다 이렇게 배플판(B)을 통하여 예열플러그(G)의 열을 배기가스에 전달함으로써, 배플판(B)으로부터 열이 방출되는 면적이 클 뿐만 아니라, 배플판(B)과 접촉하는 배기가스의 양도 증가하여 배플판(B)을 통과하는 많은 양의 배기가스 또한 온도가 급상승할 수 있게 된다.The area where heat is emitted from the baffle plate (B) by transferring the heat from the preheating plug (G) to the exhaust gas through the baffle plate (B) rather than placing the preheating plug (G) in the air where the exhaust gas moves. In addition to this large amount, the amount of exhaust gas in contact with the baffle plate B increases, so that a large amount of exhaust gas passing through the baffle plate B can also rapidly increase in temperature.
따라서 본 발명은 1000˚C까지 상승할 수 있는 고온의 예열플러그(G)를 이용하여 배플판(B)의 온도를 급상승시키고 이러한 배플판(B)을 통하여 촉매변환기(C)로 유입되기 전 배기가스의 온도를 크게 상승시켜 촉매변환기(C)에서의 3원촉매반응을 촉진시키는 것이다.Therefore, the present invention rapidly increases the temperature of the baffle plate (B) by using a high-temperature preheating plug (G) that can rise up to 1000˚C, and exhausts before flowing into the catalytic converter (C) through the baffle plate (B). It is to accelerate the three-way catalytic reaction in the catalytic converter (C) by greatly increasing the temperature of the gas.
또한 배플판(B)의 재질은 대략 1000 ˚C에 해당하는 예열플러그(G)의 높은 온도에 견딜 수 있도록 내열성을 가지는 재질로 형성될 수 있다. 그렇게 형성되어야 1000 ˚C의 높은 온도에도 변형없이 본래의 기능을 수행할 수 있게 된다.In addition, the material of the baffle plate B may be formed of a material having heat resistance so as to withstand a high temperature of the preheating plug G corresponding to approximately 1000 °C. It must be formed in such a way that the original function can be performed without any deformation even at a high temperature of 1000 ˚C.
도 3은 본 발명의 일 실시예에 따른 엔진(E)의 온도 또는 배기관(V)의 온도에 따라 제어부가 예열플러그(G)의 전원을 조절하는 것을 나타낸 도면이고, 도 4는 본 발명의 일 실시예에 따른 엔진(E)의 온도 또는 배기관(V)의 온도에 따라 제어부가 예열플러그(G)의 전원을 조절하는 것을 나타낸 순서도이다.3 is a view showing that the control unit adjusts the power of the preheating plug G according to the temperature of the engine E or the temperature of the exhaust pipe V according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention. It is a flow chart showing that the control unit adjusts the power of the preheating plug G according to the temperature of the engine E or the temperature of the exhaust pipe V according to the embodiment.
도 3 및 도 4를 참조하여 설명하면, 본 발명에 따른 자동차 배기가스 처리시스템은 온도측정부(T1) 및 제어부를 더 포함할 수 있다.3 and 4, the vehicle exhaust gas treatment system according to the present invention may further include a temperature measuring unit T1 and a control unit.
온도측정부(T1)는 엔진(E)의 온도를 측정하는 것이다. 여기서 엔진(E)의 온도 측정은 냉각수의 온도를 측정하는 것을 의미한다. 온도측정부(T1)에서 측정된 엔진(E)의 온도는 제어부에 전달되고, 제어부는 온도측정부(T1)에서 측정된 엔진(E)의 온도에 따라 예열플러그(G)의 전원을 On 하거나 또는 Off를 유지하게 된다. The temperature measuring unit T1 measures the temperature of the engine E. Here, measuring the temperature of the engine E means measuring the temperature of the coolant. The temperature of the engine (E) measured by the temperature measuring unit (T1) is transmitted to the control unit, and the control unit turns on the power of the preheating plug (G) according to the temperature of the engine (E) measured by the temperature measuring unit (T1). Or it keeps Off.
본 발명은 초기 시동시나 콜드 스타트의 경우 엔진(E)에서 배출되는 배기가스의 온도가 낮아 촉매변환기(C)에서 배기가스의 촉매반응이 원활하게 진행되지 않는 문제점을 해결하기 위한 것으로서, 엔진(E)의 온도를 측정하여 기설정온도 이하인 경우 초기 시동시나 콜드 스타트로 판단하고, 이 경우 예열플러그(G)를 동작시켜 배기가스의 온도를 수초내로 급상승시키는 것이다.The present invention is to solve the problem that the catalytic reaction of the exhaust gas does not proceed smoothly in the catalytic converter C because the temperature of the exhaust gas discharged from the engine E is low during the initial start or in the case of a cold start. If the temperature is below the preset temperature by measuring ), it is determined as the initial start or cold start. In this case, the preheating plug (G) is operated to rapidly increase the temperature of the exhaust gas within a few seconds.
예를 들어 초기 시동시 또는 콜드 스타트의 경우 엔진(E)의 온도가 25˚C 미만일 수 있다. 이 경우 예열플러그(G)를 동작시켜 배기가스의 온도를 높여 단시간 내에 촉매의 온도를 촉매반응에 적합한 400˚C 이상의 온도로 급상승시키는 것이다.For example, the temperature of the engine E may be less than 25°C during initial start-up or cold start. In this case, by operating the preheating plug (G), the temperature of the exhaust gas is raised to rapidly increase the temperature of the catalyst to a temperature of 400˚C or higher suitable for catalytic reaction.
따라서 본 발명은 초기 시동이나 콜드 스타트로 판단할 수 있는 적당한 일정온도를 미리 설정하여 두고, 미리 설정된 온도 이하인 경우 초기 시동이나 콜드 스타트로 판단하여 예열플러그(G)를 동작시킬 수 있다.Accordingly, according to the present invention, an appropriate constant temperature, which can be determined as initial start or cold start, is set in advance, and when the temperature is less than or equal to the preset temperature, it is determined as initial start or cold start to operate the preheating plug G.
또한 본 발명에 따른 자동차 배기가스 처리시스템은 온도감지부(T2)를 더 포함할 수 있다.In addition, the vehicle exhaust gas treatment system according to the present invention may further include a temperature sensing unit T2.
온도감지부(T2)는 배기 매니폴드(M)와 촉매변환기(C) 사이에 형성된 배기관(V)에 설치되어 배기관(V)의 온도를 감지하고 이를 제어부에 전달하게 된다.The temperature sensing unit T2 is installed in the exhaust pipe V formed between the exhaust manifold M and the catalytic converter C to sense the temperature of the exhaust pipe V and transmit it to the control unit.
배기관(V)은 촉매변환기(C) 바로 전단에 형성되는 것으로서 배기가스는 배기관(V)을 통하여 촉매변환기(C)로 이동하게 되는데, 이때 온도감지부(T2)는 배기관(V)의 온도를 측정하여 배기관(V)을 통과하는 배기가스의 온도를 예상하게 된다. 한편 온도감지부(T2)는 배기관(V)이 아닌 배기가스의 온도를 직접 측정할 수도 있다.The exhaust pipe (V) is formed immediately before the catalytic converter (C), and the exhaust gas moves to the catalytic converter (C) through the exhaust pipe (V). By measuring, the temperature of the exhaust gas passing through the exhaust pipe V is predicted. Meanwhile, the temperature sensing unit T2 may directly measure the temperature of the exhaust gas other than the exhaust pipe V.
온도감지부(T2)가 배기관(V) 또는 배기관(V)을 통과하는 배기가스의 온도를 측정하고, 측정된 온도가 촉매변환기(C)에서 3원촉매반응을 위한 적정온도보다 높게 측정이 되면 이때 제어부가 예열플러그(G)의 전원을 Off 시키고, 측정된 온도가 촉매변환기(C)에서 3원촉매반응을 위한 적정온도보다 낮게 측정이 되면 제어부가 예열플러그(G)의 On을 유지하게 되는 것이다.When the temperature sensing unit (T2) measures the temperature of the exhaust gas passing through the exhaust pipe (V) or the exhaust pipe (V), and the measured temperature is higher than the appropriate temperature for the three-way catalytic reaction in the catalytic converter (C), At this time, when the control unit turns off the power of the preheating plug (G) and the measured temperature is lower than the appropriate temperature for the three-way catalytic reaction in the catalytic converter (C), the control unit maintains the power of the preheating plug (G). will be.
예열플러그(G)가 동작하고 수초 이내 배기가스의 온도는 상승하여 촉매변환기(C)에 적합한 온도의 배기가스가 만들어지면, 이후 예열플러그(G)의 동작을 멈추는 것이다. 즉, 온도감지부(T2)가 배기관(V) 또는 배기관(V)을 통과하는 배기가스의 온도를 측정하는 구성을 통하여 불필요하게 예열플러그(G)가 동작되어 에너지가 낭비되는 것을 방지할 수 있게 된다. If the temperature of the exhaust gas rises within a few seconds after the preheating plug (G) is operated and the exhaust gas having a temperature suitable for the catalytic converter (C) is made, the operation of the preheating plug (G) is stopped. That is, through the configuration in which the temperature sensing unit T2 measures the temperature of the exhaust gas passing through the exhaust pipe V or the exhaust pipe V, the preheating plug G is unnecessarily operated to prevent wasting energy. do.
도 4를 참조하여 본 발명에 따른 자동차 배기가스 처리시스템의 동작을 다시한번 설명한다.The operation of the vehicle exhaust gas treatment system according to the present invention will be described again with reference to FIG. 4.
엔진(E)의 온도측정부(T1)는 엔진(E)의 온도를 측정하여 일정온도 이하로 측정되면 제어부는 예열플러그(G)의 전원을 On 시키게 된다. 한편, 온도감지부(T2)는 배기관(V) 또는 배기관(V)을 통과하는 배기가스의 온도를 지속적으로 측정하고, 온도감지부(T2)에서 측정된 온도가 기설정온도 이상이면 제어부는 예열플러그(G)의 전원을 Off 시켜 더 이상의 열의 공급을 중단하게 되고, 온도감지부(T2)에서 측정된 온도가 기설정온도보다 낮게 측정이되면 예열플러그(G)는 On을 유지하면서 배플판(B)에 지속적으로 열을 공급하게 되는 것이다.When the temperature measurement unit T1 of the engine E measures the temperature of the engine E and is measured below a certain temperature, the control unit turns on the power of the preheating plug G. On the other hand, the temperature sensing unit (T2) continuously measures the temperature of the exhaust gas passing through the exhaust pipe (V) or the exhaust pipe (V), and if the temperature measured by the temperature sensing unit (T2) is higher than a preset temperature, the control unit preheats The power of the plug (G) is turned off to stop supply of further heat, and if the temperature measured by the temperature sensing unit (T2) is measured lower than the preset temperature, the preheating plug (G) remains on and the baffle plate ( B) is constantly supplying heat.
이처럼 본 발명은 초기 시동시나 콜드 스타트의 경우 엔진(E)으로부터 배출되는 배기가스의 온도가 낮아 촉매변환기(C)에서 3원촉매반응이 원활히 진행되지 못하는 문제점을 해결하기 위한 것으로서, 초기 시동시나 콜드 스타트시 예열플러그(G)를 이용하여 배기가스의 온도를 급상승시켜 촉배변환기에서의 3원촉매반응을 촉진함으로써 초기 시동시나 콜드 스타트의 경우에도 배기가스 내 오염물질을 크게 줄일 수 있게 된다.As described above, the present invention is to solve the problem that the three-way catalytic reaction does not proceed smoothly in the catalytic converter (C) due to the low temperature of the exhaust gas discharged from the engine (E) in the case of initial start or cold start. At the start, the temperature of the exhaust gas is rapidly increased by using the preheating plug (G) to promote the three-way catalytic reaction in the catalytic exhaust converter, so that pollutants in the exhaust gas can be greatly reduced even during initial start-up or cold start.
본 발명의 보호범위가 이상에서 명시적으로 설명한 실시예의 기재와 표현에 제한되는 것은 아니다. 또한, 본 발명이 속하는 기술분야에서 자명한 변경이나 치환으로 말미암아 본 발명의 보호범위가 제한될 수도 없음을 다시 한 번 첨언한다.The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the scope of protection of the present invention may not be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.
E: 엔진
M: 배기 매니폴드
B: 배플판
G: 예열플러그
V: 배기관
C: 촉매변환기
T1: 온도측정부
T2: 온도감지부E: engine
M: exhaust manifold
B: baffle plate
G: Preheating plug
V: exhaust pipe
C: catalytic converter
T1: temperature measuring unit
T2: temperature sensing unit
Claims (5)
배기 매니폴드의 단부에 결합되어 배기가스의 흐름방향을 조절하는 배플판; 및
상기 배플판을 통과하는 배기가스의 온도를 상승시키기 위하여 상기 배플판에 결합되어 상기 배플판에 열을 공급하는 열공급부를 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템.As an automobile exhaust gas treatment system that increases the temperature of the exhaust gas to promote a three-way catalytic reaction of the exhaust gas,
A baffle plate coupled to an end of the exhaust manifold to control a flow direction of exhaust gas; And
It characterized in that it comprises a heat supply unit coupled to the baffle plate to supply heat to the baffle plate in order to increase the temperature of the exhaust gas passing through the baffle plate,
Automotive exhaust gas treatment system.
상기 열공급부는,
온도가 대략 1000˚C까지 상승할 수 있는 예열플러그를 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템.The method of claim 1,
The heat supply unit,
Characterized in that it comprises a preheating plug that can increase the temperature to about 1000˚C,
Automotive exhaust gas treatment system.
엔진의 온도를 측정하는 온도측정부; 및
상기 온도측정부에서 측정된 온도에 따라 상기 열공급부의 온/오프(On/Off)를 제어하는 제어부를 더 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템. The method of claim 1,
A temperature measuring unit that measures the temperature of the engine; And
It characterized in that it further comprises a control unit for controlling the on / off (On / Off) of the heat supply unit according to the temperature measured by the temperature measuring unit,
Automotive exhaust gas treatment system.
상기 배플판을 거친 배기가스가 통과하는 배기관에 형성되어 상기 배기관의 온도를 감지하고 이를 상기 제어부에 전달하는 온도감지부를 더 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템.The method of claim 3,
It characterized in that it is formed in the exhaust pipe passing through the exhaust gas passing through the baffle plate further comprises a temperature sensing unit for sensing the temperature of the exhaust pipe and transmitting the same to the control unit,
Automotive exhaust gas treatment system.
상기 배플판은,
상기 예열플러그의 고온에 대한 내열성을 가지는 재질을 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템.The method of claim 2,
The baffle plate,
It characterized in that it comprises a material having heat resistance to a high temperature of the preheating plug,
Automotive exhaust gas treatment system.
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