KR19980050759U - Secondary combustion device of exhaust gas - Google Patents

Secondary combustion device of exhaust gas Download PDF

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Publication number
KR19980050759U
KR19980050759U KR2019960063935U KR19960063935U KR19980050759U KR 19980050759 U KR19980050759 U KR 19980050759U KR 2019960063935 U KR2019960063935 U KR 2019960063935U KR 19960063935 U KR19960063935 U KR 19960063935U KR 19980050759 U KR19980050759 U KR 19980050759U
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KR
South Korea
Prior art keywords
exhaust
exhaust gas
harmful
catalytic converter
exhaust manifold
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KR2019960063935U
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Korean (ko)
Inventor
이봉상
Original Assignee
박병재
현대자동차 주식회사
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Priority to KR2019960063935U priority Critical patent/KR19980050759U/en
Publication of KR19980050759U publication Critical patent/KR19980050759U/en

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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
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/04—Combinations of different methods of purification afterburning and catalytic conversion
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

엔진의 냉시동시에 특히 많이 배출되는 유해 배기가스(HC, Co)를 배기 매니폴드의 후방에서 2차적으로 재연소시키는 배기가스의 2차 연소장치에 관한 것이다.The present invention relates to a secondary combustion apparatus for exhaust gas, which secondaryly reburns harmful exhaust gases HC and Co, which are particularly emitted at the time of cold start of the engine, from the rear of the exhaust manifold.

이를 위하여, 배기 파이프(4)와 연결된 촉매 컨버터(3)의 전방에는 제 1 센서(5)가 설치되고, 후방에는 제 2 센서(6)가 설치된다. 제 1 및 제 2 센서에 의해 검출된 유해 배기가스의 배출량은 전자제어유닛으로 보내지고, 그 정보에 따라, 전자제어유닛은 상기 배기 매니폴드(2)의 후방으로 액화 석유가스를 분사하는 인젝터(7)의 개폐동작을 제어한다.To this end, a first sensor 5 is installed in front of the catalytic converter 3 connected to the exhaust pipe 4, and a second sensor 6 is installed at the rear. The discharge amount of the harmful exhaust gas detected by the first and second sensors is sent to the electronic control unit, and according to the information, the electronic control unit injects the liquefied petroleum gas into the rear of the exhaust manifold 2 ( Control the opening and closing operation of 7).

이러한 구성에 따라 배기 매니폴드를 통하여 배출된 배기가스 특히, HC, CO 성분은 배기 파이프 중에서 2차적으로 연소되어 그 배출량이 감소된다. 또한, 그 연소열에 의해 조기에 활성화되는 촉매에 의해 퍼펙트하게 정화된다.According to this structure, the exhaust gas discharged through the exhaust manifold, in particular, the HC and CO components are secondaryly burned in the exhaust pipe, so that the emission thereof is reduced. In addition, it is perfectly purified by a catalyst which is activated early by the heat of combustion.

Description

배기가스의 2차 연소장치Secondary combustion device of exhaust gas

본 고안은 배기가스의 2차 연소장치에 관한 것으로서, 특히 엔진의 냉시동(cold start)시에 많이 배출되는 유해 배기가스(HC, CO)를 배기 매니폴드와 촉매 컨버터의 사이에서 2차적으로 재연소시키므로서, 그 배기가스의 유해 성분을 감소시킬 수 있도록 한 배기가스의 2차 연소장치에 관한 것이다.The present invention relates to a secondary combustion device of exhaust gas, and in particular, regenerates harmful exhaust gases (HC, CO), which are frequently discharged during cold start of the engine, between the exhaust manifold and the catalytic converter. The present invention relates to a secondary combustion device for exhaust gas, which is capable of reducing the harmful components of the exhaust gas by quenching.

주지된 바와 같이, 자동차의 배기계는 엔진의 연소실에서 연소된 배기가스를 외부로 배출시키기 위해, 배기 매니폴드, 배기파이프, 촉매 컨버터 및 머플러를 구비하여 이루어진다.As is well known, the exhaust system of an automobile is provided with an exhaust manifold, an exhaust pipe, a catalytic converter and a muffler to exhaust the exhaust gas combusted in the combustion chamber of an engine to the outside.

이러한 배기계에 있어서, 연소실에서 배출되는 배기가스는 인체에 무해한 수증기(H2O), 질소(N2), 탄산가스(CO2) 등도 있으나, 일산화탄소(CO), 탄화수소(HC), 질소 산화물(NOx) 등의 유독성 물질을 포함하게 된다.In such an exhaust system, the exhaust gas discharged from the combustion chamber includes water vapor (H 2 O), nitrogen (N 2 ), carbon dioxide (CO 2 ), and the like, which are harmless to humans, but carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides ( Toxic substances such as NOx).

이러한 배기가스의 유해성분을 제거하기 위한 방안으로, 종래 공지된 것으로는 배기 매니폴드를 통해 배출된 배기가스가 촉매 컨버터를 통과하도록 하므로서, 산화 또는 환원 촉매를 이용하여 정화시키는 촉매 컨버터 방식이 있다.As a method for removing the harmful components of the exhaust gas, there is a conventionally known catalytic converter method that allows the exhaust gas discharged through the exhaust manifold to pass through the catalytic converter, thereby purifying using an oxidation or reduction catalyst.

또한, 종래에는 배기가스에 신선한 공기를 불어넣어 CO와 HC의 함유량을 감소시킨 후, 그 배기가스를 촉매 컨버터로 보내 촉매의 정화 효율이 최대로 실현될 수 있도록 하는 2차 공기 공급장치가 제안되어 있다.In addition, conventionally, a secondary air supply apparatus is proposed in which fresh air is blown into the exhaust gas to reduce the content of CO and HC, and then the exhaust gas is sent to the catalytic converter to maximize the purification efficiency of the catalyst. have.

그러나 상기한 촉매 천버터 및 2차 공기 공급장치는 시동 초기 즉, 엔진의 냉시동시, 농후한 혼합기로 인해 과도한 유해 가스 특히, HC, CO 성분이 다량으로 발생되는 문제점이 있다.However, the above-described catalyst cloth butter and the secondary air supply device have a problem in that a large amount of harmful gases, especially HC and CO components are generated due to the rich mixer during the initial start-up, that is, during cold start of the engine.

이러한 문제점은 촉매의 활성화에 소정의 온도 및 체류시간이 필요하여, 엔진의 냉시동시 촉매의 정화 효율이 저하되므로서, 다량의 유해 가스를 배출시키게 되는 것이다.The problem is that the activation of the catalyst requires a predetermined temperature and residence time, which lowers the purification efficiency of the catalyst during cold start of the engine, thereby releasing a large amount of harmful gas.

본 고안은 상술한 종래 기술의 문제점을 해소하기 위한 목적에서 제안된 것으로서, 엔진의 냉시동시 다량으로 배출되는 배기가스를 배기계중에서 2차적으로 연소시켜, 유해 배기가스(HC, CO)의 연소를 실현하는 배기가스의 2차 연소장치를 제공한다.The present invention has been proposed for the purpose of solving the above-mentioned problems of the prior art, and realizes combustion of harmful exhaust gases (HC, CO) by secondary combustion of exhaust gases discharged in large quantities during cold start of the engine in the exhaust system. To provide a secondary combustion device of the exhaust gas.

또한, 본 고안은 배기가스의 연소열에 의해 촉매가 조기에 활성화 온도까지 도달될 수 있도록 하는 목적을 제공한다.In addition, the present invention provides an object to enable the catalyst to reach the activation temperature early by the heat of combustion of the exhaust gas.

도 1 은 본 고안에 의한 배기가스의 2차 연소장치를 도시한 구성도.1 is a block diagram showing a secondary combustion device of the exhaust gas according to the present invention.

도 2 는 본 고안에 의한 배기가스의 배출량과 일반적인 배출량을 비교 도시한 도표.Figure 2 is a diagram showing a comparison of the emissions and the general emissions of the exhaust gas according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

2 - 배기 매니폴드3 - 촉매 컨버터2-exhaust manifold 3-catalytic converter

4 - 배기 파이프5 - 제 1 센서4-exhaust pipe 5-first sensor

6 - 제 2 센서7 - 인젝터6-2nd Sensor 7-Injector

이하, 본 고안을 실현하기 위한 바람직한 실시예를 첨부 도면에 의거하여 보다 상세히게 설명한다.Hereinafter, preferred embodiments for realizing the present invention will be described in more detail with reference to the accompanying drawings.

도 1은 본 실시예에 관련된 배기가스의 2차 연소장치를 도시한 전체 구성도이다.1 is an overall configuration diagram showing a secondary combustion device of exhaust gas according to the present embodiment.

도면에서의 설명 부호 (1)은 연소실을 지칭한다. 연소실(1)에서 연소된 배기가스는 엔진의 배기 행정시 배기 매니폴드(2)를 통해 배출된다.Reference numeral 1 in the drawing refers to the combustion chamber. The exhaust gas combusted in the combustion chamber 1 is discharged through the exhaust manifold 2 during the exhaust stroke of the engine.

배기 매니폴드(2)에서 배출된 배기가스는 배기 파이프(4)를 통하여 촉매 컨버터(3)로 보내지고, 그 촉매 컨버터(3)에 의해 산화, 환원된다.The exhaust gas discharged from the exhaust manifold 2 is sent to the catalytic converter 3 through the exhaust pipe 4, and oxidized and reduced by the catalytic converter 3.

이와 같은 구성들을 포함하는 자동차 엔진의 배기계에 있어서, 본 실시예는 엔진의 냉시동시 촉매가 활성화되지 않아, 다량으로 배출되는 유해 배기 성분(HC, CO)를 저감시키기 위해, 그 배기가스를 2차 연소시키는 수단을 제안한다.In the exhaust system of an automobile engine including such a configuration, in the present embodiment, the catalyst is not activated during cold start of the engine, so that the exhaust gas is secondary to reduce harmful exhaust components (HC, CO) emitted in a large amount. Propose means for burning.

보다 구체적으로, 본 실시예의 2차 연소장치는 배기 파이프(4)에 설치된 촉매 컨버터(3)의 전방에 제 1 센서(5)를 설치하고, 그 촉매 컨버터(3)의 후방에 제 2 센서(6)를 설치한다.More specifically, in the secondary combustion device of the present embodiment, the first sensor 5 is installed in front of the catalytic converter 3 installed in the exhaust pipe 4, and the second sensor ( 6) Install.

제 1 및 제 2 센서(5, 6)는 전자제어유닛(ECU)과 전기적으로 연결된다.The first and second sensors 5, 6 are electrically connected to the electronic control unit ECU.

한편, 연소실에서 배출된 배기가스의 통로인 배기 매니폴드(2)의 후방에는 액화 석유가스(LPG)를 분사하는 인젝터(7)가 설치된다. 인젝터(7)는 파이프(8)를 통하여 도시되지 않은 LPG 탱크와 연결된다.On the other hand, an injector 7 for injecting liquefied petroleum gas LPG is provided at the rear of the exhaust manifold 2, which is a passage of the exhaust gas discharged from the combustion chamber. The injector 7 is connected via a pipe 8 to an LPG tank, not shown.

이상에서 설명된 본 실시예의 구성에 의거하여, ECU는 제 1 및 제 2 센서(5, 6)의 시그널을 비교하여, 유해 배기가스의 배출량을 검출한다.Based on the configuration of this embodiment described above, the ECU compares the signals of the first and second sensors 5, 6 to detect the emissions of harmful exhaust gas.

그 정보에 따라, 상기 ECU는 배기 매니폴드(2)의 후방에 설치된 인젝터(7)를 제어하여, 그 인젝터(7)를 통해 배기 매니폴드(2)의 후방에 LPG를 분사한다.According to the information, the ECU controls the injector 7 installed at the rear of the exhaust manifold 2, and injects LPG at the rear of the exhaust manifold 2 through the injector 7.

상기한 LPG는 배기 매니폴드(2)를 통하여 배출된 배기가스의 고열에 의해 연소되면서, 배기가스중의 HC, CO 성분을 감소시킨다. 또한, 그 연소열에 의해 촉매를 조기에 활성화시킴으로써, 유해 가스 성분을 퍼펙트하게 정화한다.The LPG is burned by the high heat of the exhaust gas discharged through the exhaust manifold 2, thereby reducing the HC and CO components in the exhaust gas. In addition, by activating the catalyst early by the heat of combustion, the harmful gas components are purified perfectly.

이상에서 설명된 본 실시예의 작용에 의한 결과로서, 도 2에는 본 고안에 의한 배기가스의 배출량과 일반적인 차량의 배출량이 비교 도시되어 있다.As a result of the operation of the present embodiment described above, Figure 2 shows a comparison of the emissions of the exhaust gas and the general vehicle emissions according to the present invention.

도면을 통하여 알 수 있듯이, 본 실시예에 의한 배기가스의 배출량은 촉매 활성화 온도까지 도달되는 중에, 일반적인 차량에 비해 유해 배기가스의 배출량이 퍼펙트하게 감소된다.As can be seen from the figure, while the exhaust gas emission amount according to the present embodiment reaches the catalyst activation temperature, the emission amount of the harmful exhaust gas is significantly reduced compared to a general vehicle.

이상에서 설명된 구성 및 작용을 통하여 알 수 있는 바와 같이, 본 고안에 의한 배기가스의 2차 연소장치는 종래 기술의 문제점을 실질적으로 해소한다.As can be seen through the configuration and operation described above, the secondary combustion device of the exhaust gas according to the present invention substantially solves the problems of the prior art.

즉 본 고안에 의하면, 배기가스의 유해 성분 특히 HC와 CO를 배기계에서 2차적으로 연소시키므로서, 그 유해 배기가스의 배출량을 감소시키는 효과를 얻을 수 있다.That is, according to the present invention, it is possible to obtain the effect of reducing the emissions of the harmful exhaust gas by burning the harmful components of the exhaust gas, in particular, HC and CO, in the exhaust system secondarily.

또한, 본 고안에 의하면 배기가스의 유해 성분이 저감된 상태에서 촉매 컨버터에 의해 다시 한번 정화되므로서, 그 배기가스의 유해 성분을 퍼펙트하게 감소시킬 수 있다.Further, according to the present invention, the harmful component of the exhaust gas is once again purified by the catalytic converter in a state where the harmful component is reduced, so that the harmful component of the exhaust gas can be reduced to a perfect level.

한편 본 고안은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 실용신안등록 청구의 범위에서 청구하는 본 고안의 요지를 벗어남이 없이 당해 고안이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능할 것이다.On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the utility model registration claims. Implementation will be possible.

Claims (1)

연소실의 배기 포트와 연결된 배기 매니폴드와, 그 배기 매니폴드에 배기 파이프를 통해 연결된 촉매 컨버터를 포함하여 구성된 자동차 엔진의 배기계에 있어서,An exhaust system of an automobile engine comprising an exhaust manifold connected to an exhaust port of a combustion chamber and a catalytic converter connected to the exhaust manifold via an exhaust pipe, 상기 촉매 컨버터의 전방에 설치된 제 1 센서와, 그 촉매 컨버터의 후방에 설치된 제 2 센서와,A first sensor provided at the front of the catalytic converter, a second sensor provided at the rear of the catalytic converter, 제 1 및 제 2 센서의 시그널에 의해 유해 배기가스의 배출량을 검출하는 전자제어유닛과,An electronic control unit which detects emissions of harmful exhaust gases by signals of the first and second sensors, 그 전자제어유닛에 의해 제어되고, 상기 배기 매니폴드의 후방으로 액화 석유가스를 분사하므로서, 배기가스를 재연소시키는 인젝터를 포함하여 구성된 것을 특징으로 하는 배기가스의 2차 연소장치.And an injector controlled by the electronic control unit for injecting liquefied petroleum gas into the rear of the exhaust manifold to reburn the exhaust gas.
KR2019960063935U 1996-12-30 1996-12-30 Secondary combustion device of exhaust gas KR19980050759U (en)

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