KR102697582B1 - Automobile exhaust gas treatment system - Google Patents

Automobile exhaust gas treatment system Download PDF

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KR102697582B1
KR102697582B1 KR1020190077321A KR20190077321A KR102697582B1 KR 102697582 B1 KR102697582 B1 KR 102697582B1 KR 1020190077321 A KR1020190077321 A KR 1020190077321A KR 20190077321 A KR20190077321 A KR 20190077321A KR 102697582 B1 KR102697582 B1 KR 102697582B1
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temperature
exhaust gas
baffle plate
treatment system
present
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KR1020190077321A
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Korean (ko)
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KR20210001349A (en
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김인수
신재현
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르노코리아 주식회사
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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

본 발명은 배기가스의 온도를 상승시켜 배기가스의 3원촉매반응을 촉진하는 자동차 배기가스 처리시스템으로서, 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 처리시스템에 관한 것이다.The present invention relates to an automobile exhaust gas treatment system that promotes a three-way catalytic reaction of exhaust gas by increasing the temperature of the exhaust gas, the system comprising: a baffle plate coupled to an end of an exhaust manifold to control the flow direction of exhaust gas; and a heat supply unit coupled to the baffle plate to supply heat to the baffle plate to increase the temperature of exhaust gas passing through the baffle plate.

Description

자동차 배기가스 처리시스템{AUTOMOBILE EXHAUST GAS TREATMENT SYSTEM}{AUTOMOBILE EXHAUST GAS TREATMENT SYSTEM}

본 발명은 자동차의 배기가스를 처리하는 기술에 관한 것이다.The present invention relates to a technology for treating exhaust gas from 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 that enters the engine through the intake device is discharged into the air through the exhaust device after the engine is combusted. The exhaust gas generated during the combustion process of this engine is discharged as is with high pressure and high temperature, and contains air pollutants such as nitrogen oxides, carbon monoxide, and hydrocarbons generated during the combustion process, so various 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 travel through the exhaust pipe to the catalytic converter, 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 materials based on aluminum, with platinum, rhodium, and palladium as catalysts. Exhaust gas passes through a catalytic converter with these catalysts installed, and the three major pollutants in the exhaust gas are converted into harmless substances such as carbon dioxide, water, and nitrogen through chemical reactions. It is also called a three-way catalyst because it causes chemical reactions among the three substances.

현재 배기가스에 대한 법규가 강화됨에 따라서 촉매변환기의역할이 더욱 중요해졌다. 촉매변환기에서의 3원촉매 반응이 촉진되기 위해서는 배기가스가 일정온도 이상일 필요가 있다.As regulations on exhaust gas are becoming more stringent, the role of catalytic converters has become more important. In order for the three-way catalytic reaction in the catalytic converter to be promoted, the exhaust gas must 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, the purification rate of nitrogen oxides, carbon monoxide, and hydrocarbons is the highest when the temperature of the exhaust gas is 400°C or higher. However, in the case of an initial start or a cold start, the temperature of the catalyst is very low, so the catalytic reaction does not occur well. To solve this problem, the idle rpm is increased to 1500 rpm or higher after the initial start or to 2000 rpm or higher during a cold start, and the exhaust gas discharged at this time is used to increase the catalytic reaction temperature.

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.This method has the problem that it takes a long time to preheat the catalyst, during which time the catalytic reaction does not occur properly, resulting in a large amount of unburned exhaust gas being emitted, and a lot of fuel being 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 inventor of the present invention completed the present invention after a long period of research and trial and error to solve the problems of the conventional method.

본 발명은 초기 시동시 또는 콜드 스타트인 경우 촉매변환기의 3원촉매반응을 효율적으로 촉진할 수 있는 자동차 배기가스 처리시스템을 제공하고자 한다.The present invention seeks to provide an automobile exhaust gas treatment system capable of efficiently promoting a three-way catalytic reaction of a catalytic converter during initial startup 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 unspecified purposes of the present invention will be additionally considered within a range that can be easily inferred from the following detailed description and its effects.

본 발명의 실시예에 따라서, 배기가스의 온도를 상승시켜 배기가스의 3원촉매반응을 촉진하는 자동차 배기가스 처리시스템으로서,According to an embodiment of the present invention, an automobile exhaust gas treatment system for promoting a three-way catalytic reaction of exhaust gas by increasing the temperature of exhaust gas,

배기 매니폴드의 단부에 결합되어 배기가스의 흐름방향을 조절하는 배플판; 및A baffle plate connected to the end of the exhaust manifold to control the 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 is characterized by including a heat supply unit coupled to the baffle plate and supplying heat to the baffle plate to increase the temperature of the exhaust gas passing through the baffle plate.

자동차 배기가스 처리시스템을 제공한다.Provides an automobile exhaust gas treatment system.

본 발명의 일 실시예에 따라서 상기 열공급부는,According to one embodiment of the present invention, the heat supply unit,

온도가 대략 1000˚C까지 상승할 수 있는 예열플러그를 포함할 수 있다.It may include a glow plug capable of reaching a temperature of approximately 1000˚C.

본 발명의 일 실시예에 따라서 엔진의 온도를 측정하는 온도측정부; 및A temperature measuring unit for measuring the temperature of an engine according to one embodiment of the present invention; and

상기 온도측정부에서 측정된 온도에 따라 상기 열공급부의 온/오프(On/Off)를 제어하는 제어부를 더 포함할 수 있다.The device may further include a control unit that controls turning the heat supply unit on/off 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 one embodiment of the present invention, a temperature sensing unit may be further included, which is formed in an exhaust pipe through which exhaust gas passing through the baffle plate passes, to detect the temperature of the exhaust pipe and transmit the temperature thereof to the control unit.

본 발명의 일 실시예에 따라서 상기 배플판은,According to one embodiment of the present invention, the baffle plate comprises:

상기 예열플러그의 고온에 대한 내열성을 가지는 재질을 포함할 수 있다.The above-mentioned glow plug may include a material having heat resistance against high temperatures.

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.By using the automobile exhaust gas treatment system according to the present invention, even during initial startup or cold start, the three-way catalytic reaction of the catalytic converter is promoted, so that pollutants in exhaust gas emitted to the outside can be significantly 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.Meanwhile, it is added that even if an effect is not explicitly mentioned herein, the effect and its provisional effect described in the following specification 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.FIG. 1 is a schematic diagram showing an automobile exhaust gas treatment system according to one embodiment of the present invention.
FIG. 2 is a drawing showing a glow plug coupled to a baffle plate according to one embodiment of the present invention.
FIG. 3 is a drawing showing a control unit controlling power to a glow plug according to the temperature of an engine or the temperature of an exhaust pipe according to one embodiment of the present invention.
FIG. 4 is a flowchart showing how a control unit adjusts power to a glow plug according to the temperature of an engine or the temperature of an exhaust pipe according to one embodiment of the present invention.
Figure 5 is a graph of exhaust gas temperature and pollutant purification rate.
It is to be understood that the attached drawings are provided for reference only to help understand the technical concept of the present invention, and the scope of the rights of the present invention is not limited thereby.

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, if it is judged that the detailed description of related known functions that are obvious to those skilled in the art and may unnecessarily obscure the gist of the present invention, the detailed description 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 terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprises" or "has" and the like are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

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, an embodiment of an automobile exhaust gas treatment system according to the present invention will be described in detail with reference to the attached drawings. When describing with reference to the attached drawings, identical or corresponding components are assigned the same drawing numbers and redundant descriptions thereof are 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.The temperature of the combustion chamber during combustion of the engine is very high, and at high output, it can rise to over 1,000˚C. As a result, the temperature of the exhaust gas generated after combustion is also high, at around 950˚C, and the exhaust device is also exposed to high temperatures. It varies depending on the engine RPM and various conditions, but 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 in 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 at the initial start or cold start. Therefore, the present invention rapidly increases the temperature of the exhaust gas through an additional configuration such as a glow plug so that the three-way catalytic reaction can be promoted in the catalytic converter even at the initial start or cold start.

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.FIG. 1 is a schematic diagram showing an automobile exhaust gas treatment system according to one embodiment of the present invention. As shown in FIG. 1, the automobile exhaust gas treatment system according to the present invention may include a baffle plate (B) and a heat supply unit to promote a three-way catalytic reaction of exhaust gas by increasing the temperature of low-temperature exhaust gas in the case of initial startup or cold start.

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 created by combustion in the engine (E) passes first. The exhaust manifold (M) is a manifold connected to the combustion chamber of each cylinder and plays a role in smoothly delivering 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 connected to the end of the exhaust manifold (M) to control the direction of flow of exhaust gas moving to the exhaust pipe (V) or to disperse the exhaust gas. At this time, the baffle plate (B) may be formed in any of the shapes of a square, an oval, a circle, or a modified form thereof. If the baffle plate (B) is formed in a wide plate shape and this baffle plate (B) is heated to a high temperature, the temperature of the exhaust gas also increases due to this 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 preheat plug (G). The preheat plug (G) according to the present invention may be formed so that the temperature can rise to approximately 1000˚C within several seconds. The high-temperature preheat plug (G) that can rise to 1000˚C heats the baffle plate (B), and the heated baffle plate (B) increases the temperature of the exhaust gas.

도 2는 본 발명의 일 실시예에 따른 예열플러그(G)가 배플판(B)에 결합된 것을 나타낸 도면이다.FIG. 2 is a drawing showing a preheating plug (G) coupled to a baffle plate (B) according to one 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 illustrated in Fig. 2, the wick of the glow plug (G) is coupled with the lower portion of the baffle plate (B) so that the high temperature of the glow plug (G) wick can be transferred to the baffle plate (B). Since the high temperature of the glow plug (G) is generated in the wick portion, the glow plug (G) wick and the baffle plate (B) are directly coupled face to face so that the high temperature of the glow plug (G) wick is directly transferred to the baffle plate (B).

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.By transferring the heat of the glow plug (G) to the exhaust gas through the baffle plate (B) rather than arranging the glow plug (G) in the air through which the exhaust gas moves, not only is the area over which heat is released from the baffle plate (B) larger, but also the amount of exhaust gas coming into contact with the baffle plate (B) increases, so that the temperature of a large amount of exhaust gas passing through the baffle plate (B) can also rise rapidly.

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 uses a high-temperature preheating plug (G) that can rise to 1000˚C to rapidly increase the temperature of a baffle plate (B), and significantly increases the temperature of exhaust gas before it flows into a catalytic converter (C) through the baffle plate (B), thereby promoting a three-way catalytic reaction in the catalytic converter (C).

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) can be formed of a heat-resistant material that can withstand the high temperature of the preheating plug (G) corresponding to approximately 1000 ˚C. If formed in this way, it can perform its original function without 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.FIG. 3 is a drawing showing that a control unit adjusts the power of a glow plug (G) according to the temperature of an engine (E) or the temperature of an exhaust pipe (V) according to one embodiment of the present invention, and FIG. 4 is a flowchart showing that a control unit adjusts the power of a glow plug (G) according to the temperature of an engine (E) or the temperature of an exhaust pipe (V) according to one embodiment of the present invention.

도 3 및 도 4를 참조하여 설명하면, 본 발명에 따른 자동차 배기가스 처리시스템은 온도측정부(T1) 및 제어부를 더 포함할 수 있다.Referring to FIGS. 3 and 4, the automobile 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 the power of the glow plug (G) On or Off according to the temperature of the engine (E) measured by the temperature measuring unit (T1).

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 temperature of exhaust gas emitted from an engine (E) is low during initial startup or cold start, and thus the catalytic reaction of exhaust gas in a catalytic converter (C) does not proceed smoothly. The temperature of the engine (E) is measured, and if it is below a preset temperature, it is determined that it is during initial startup or a cold start, and in this case, a glow 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, during initial start-up or cold start, the temperature of the engine (E) may be below 25˚C. In this case, the glow plug (G) is operated to increase the temperature of the exhaust gas, thereby rapidly increasing the temperature of the catalyst to over 400˚C, which is suitable for catalytic reaction, in a short period of time.

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.Therefore, the present invention can preset an appropriate constant temperature that can be determined as an initial start or a cold start, and when the temperature is lower than the preset temperature, it can be determined as an initial start or a cold start and the preheating plug (G) can be operated.

또한 본 발명에 따른 자동차 배기가스 처리시스템은 온도감지부(T2)를 더 포함할 수 있다.In addition, the automobile 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 detect 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 in front of the catalytic converter (C), and the exhaust gas moves to the catalytic converter (C) through the exhaust pipe (V). At this time, the temperature sensing unit (T2) measures the temperature of the exhaust pipe (V) and estimates the temperature of the exhaust gas passing through the exhaust pipe (V). Meanwhile, the temperature sensing unit (T2) can also directly measure the temperature of the exhaust gas rather 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.The temperature sensing unit (T2) measures the temperature of the exhaust pipe (V) or the exhaust gas passing through the exhaust pipe (V), and if the measured temperature is higher than the appropriate temperature for the three-way catalytic reaction in the catalytic converter (C), the control unit turns off the power of the glow plug (G), and if the measured temperature is lower than the appropriate temperature for the three-way catalytic reaction in the catalytic converter (C), the control unit keeps the glow plug (G) turned on.

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. When the glow plug (G) operates, the temperature of the exhaust gas rises within a few seconds, and when the exhaust gas is created at a temperature suitable for the catalytic converter (C), the operation of the glow plug (G) is stopped. That is, by configuring the temperature sensor (T2) to measure the temperature of the exhaust pipe (V) or the exhaust gas passing through the exhaust pipe (V), it is possible to prevent energy from being wasted due to unnecessary operation of the glow plug (G).

도 4를 참조하여 본 발명에 따른 자동차 배기가스 처리시스템의 동작을 다시한번 설명한다.The operation of the automobile 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.The temperature measuring unit (T1) of the engine (E) measures the temperature of the engine (E), and when the temperature is measured to be below a certain temperature, the control unit turns on the power of the glow plug (G). Meanwhile, the temperature sensing unit (T2) continuously measures the temperature of the exhaust pipe (V) or the exhaust gas passing through the exhaust pipe (V), and when the temperature measured by the temperature sensing unit (T2) is higher than the preset temperature, the control unit turns off the power of the glow plug (G) to stop further heat supply, and when the temperature measured by the temperature sensing unit (T2) is measured to be lower than the preset temperature, the glow plug (G) remains on and continuously supplies heat to the baffle plate (B).

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.Thus, the present invention is intended to solve the problem of the three-way catalytic reaction not progressing smoothly in the catalytic converter (C) due to the low temperature of the exhaust gas discharged from the engine (E) during initial start-up or cold start, by rapidly increasing the temperature of the exhaust gas using a glow plug (G) during initial start-up or cold start, thereby promoting the three-way catalytic reaction in the catalytic converter, thereby significantly reducing pollutants in the exhaust gas 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 belongs.

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: Glow plug
V: exhaust pipe
C: Catalytic converter
T1: Temperature measurement unit
T2: Temperature sensing unit

Claims (5)

배기가스의 온도를 급상승시켜 배기가스의 3원촉매반응을 촉진하는 자동차 배기가스처리시스템으로서,
배기 매니폴드의 단부에 결합되어 배기가스의 흐름방향을 조절하고, 판 형상을 갖는 배플판; 및
상기 배플판을 통과하는 배기가스의 온도를 상승시키기 위하여 상기 배플판에 결합되어 상기 배플판에 열을 직접 공급하는 예열플러그를 포함하되,
상기 예열플러그는 발생한 고온을 전달하기 위한 심지를 포함하며, 상기 심지는 상기 배기가스의 온도를 급상승시키기 위하여 연장된 방향으로 상기 배플판과 면대면 접촉하도록 결합된 것을 특징으로 하는,
자동차 배기가스 처리시스템.As an automobile exhaust gas treatment system that rapidly increases the temperature of exhaust gas and promotes the three-way catalytic reaction of exhaust gas,
A baffle plate having a plate shape and connected to the end of the exhaust manifold to control the flow direction of exhaust gas; and
In order to increase the temperature of exhaust gas passing through the baffle plate, a preheating plug is included which is coupled to the baffle plate and directly supplies heat to the baffle plate.
The above-mentioned preheating plug includes a wick for transmitting the generated high temperature, and the wick is characterized in that it is coupled to be in face-to-face contact with the baffle plate in an extended direction to rapidly increase the temperature of the exhaust gas.
Automobile exhaust gas treatment system. 삭제delete 제1항에 있어서,
엔진의 온도를 측정하는 온도측정부; 및
상기 온도측정부에서 측정된 온도에 따라 상기 예열플러그의 온/오프(On/Off)를 제어하는 제어부를 더 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템. In the first paragraph,
A temperature measuring unit for measuring the temperature of the engine; and
It is characterized by further including a control unit that controls the on/off of the preheating plug according to the temperature measured by the temperature measuring unit.
Automobile exhaust gas treatment system. 제3항에 있어서,
상기 배플판을 거친 배기가스가 통과하는 배기관에 형성되어 상기 배기관 또는 배기가스의 온도를 감지하고 이를 상기 제어부에 전달하는 온도감지부를 더 포함하는 것을 특징으로 하는,
자동차 배기가스 처리시스템.In the third paragraph,
It is characterized in that it further includes a temperature sensing unit formed in an exhaust pipe through which exhaust gas passing through the baffle plate passes, detecting the temperature of the exhaust pipe or exhaust gas and transmitting it to the control unit.
Automobile exhaust gas treatment system. 삭제delete
KR1020190077321A 2019-06-27 2019-06-27 Automobile exhaust gas treatment system KR102697582B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002276347A (en) * 2001-02-06 2002-09-25 Robert Bosch Gmbh Exhaust gas treatment equipment comprising stored catalyst
KR200433965Y1 (en) * 2006-10-02 2006-12-14 전남대학교산학협력단 Exhaust system of diesel passenger car with baffle plate

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Publication number Priority date Publication date Assignee Title
KR101251481B1 (en) * 2006-04-20 2013-04-05 기아자동차주식회사 Emission control system of diesel vehicle and method thereof
KR20120034384A (en) * 2010-10-01 2012-04-12 권영웅 Unity type two-way smoke reduction apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002276347A (en) * 2001-02-06 2002-09-25 Robert Bosch Gmbh Exhaust gas treatment equipment comprising stored catalyst
KR200433965Y1 (en) * 2006-10-02 2006-12-14 전남대학교산학협력단 Exhaust system of diesel passenger car with baffle plate

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