KR20140002326A - Blade mixer for mixing urea of automobile - Google Patents

Blade mixer for mixing urea of automobile Download PDF

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KR20140002326A
KR20140002326A KR1020120070648A KR20120070648A KR20140002326A KR 20140002326 A KR20140002326 A KR 20140002326A KR 1020120070648 A KR1020120070648 A KR 1020120070648A KR 20120070648 A KR20120070648 A KR 20120070648A KR 20140002326 A KR20140002326 A KR 20140002326A
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exhaust pipe
urea
blade mixer
scr
shear
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KR1020120070648A
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Korean (ko)
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KR101369651B1 (en
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주재근
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쌍용자동차 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • 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

Abstract

The present invention relates to a blade mixer for mixing urea of a vehicle and, more specifically, a blade mixer for mixing urea of a vehicle, capable of enabling exhaust gas of an engine and fine particles of the urea injected by an injector to be discharged to a rear exhaust pipe through a silicon controlled rectifier (SCR) by including the blade mixer in which a plurality of wing units is formed in the rear inside of a temperature sensor and a nitrogen oxide sensor in a front SCR exhaust pipe.

Description

자동차의 우레아 믹싱용 블레이드 믹서{blade mixer for mixing urea of automobile}Blade mixer for mixing urea of automobile

본 발명은 자동차의 우레아 믹싱용 블레이드 믹서에 관한 것으로서, 더욱 상세히는 전단 SCR 배기관의 질소산화물 센서와 온도센서 후방 내부에 다수 개의 날개부가 형성되는 블레이드 믹서를 구비하여, 엔진의 배출가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자가 짧은 길이의 전단 배기관 내에서 유동이 분산됨에 따라 SCR 촉매전단에 넓게 분포되어 SCR을 통해 후단 배기관으로 배출될 수 있도록 한 자동차의 우레아 믹싱용 블레이드 믹서에 관한 것이다.
The present invention relates to a blade mixer for urea mixing of an automobile, and more particularly, to a blade mixer having a plurality of blades formed inside the rear of a nitrogen oxide sensor and a temperature sensor of a front end SCR exhaust pipe, and an exhaust gas and urea injection injector of an engine. The present invention relates to a blade mixer for urea mixing of an automobile in which fine particles of urea injected from the gas are dispersed in the front end of the SCR catalyst as the flow is dispersed in the short exhaust pipe of the urea and discharged to the rear end of the exhaust pipe through the SCR.

최근 들어 지구 환경에 대한 관심이 커지면서 도심지의 대기질 악화에 가장 큰 주범으로 자동차가 배출하는 유해물질이 손꼽히고 있는 것이다.Recently, as interest in the global environment grows, harmful substances emitted by automobiles are one of the leading causes of deterioration of air quality in urban areas.

특히, 디젤차량의 배출물질 중 상대적으로 배출량이 많은 질소산화물(NOx)과 입자상 물질 PM(Particulate Matter)을 줄이기 위한 배출가스 후처리 시스템에 대한 개발 노력이 국내 및 해외에서 계속 진행되는 것이다.In particular, efforts are being made to develop exhaust gas after-treatment systems to reduce nitrogen oxides (NOx) and particulate matter PM (Particulate Matter), which are relatively high emissions among diesel vehicles.

그 결과 입자상 물질 배출과 관련해서는 제로(zero)에 가깝게 만드는 매연여과장치DPF(diesel particulate filter)를 장착하도록 강제화하는 EU5 법규가 2009년 9월부터 유럽과 국내 동시에 시행되고 있는 것이다.As a result, EU5 legislation has been in effect since September 2009, forcing the installation of diesel particulate filters (DPFs), which are close to zero with regard to particulate emissions.

따라서, 향후 디젤차량의 배출가스를 줄이기 위해 중점적으로 연구, 개발될 시스템이 바로 질소산화물 저감(DeNOx) 시스템이다.Therefore, the system to be researched and developed in order to reduce the emission of diesel vehicles in the future is the nitrogen oxide reduction (DeNOx) system.

그 중 가장 높은 질소산화물 저감 효율을 보이는 시스템이 우레아를 이용한 선택적 환원촉매 저감(Selective Catalytic Reduction. SCR)시스템인 것이다.Among them, the system that shows the highest nitrogen oxide reduction efficiency is the Selective Catalytic Reduction (SCR) system using urea.

이렇게, 우레아를 이용한 SCR 시스템을 장착한 경우, 질소산화물 저감을 극대화할 수 있는 우레아 분사(urea injection) 최적화가 무척 중요한 것이다.Thus, when equipped with an SCR system using urea, urea injection optimization to maximize nitrogen oxide reduction is very important.

우레아 분사 최적화를 위한 종래의 기술이 대한민국특허청 공개특허 공보 10-2011-0052852호(2011.05.19. 공개)(발명의 명칭: 우레아 분사 최적화 시스템)(이하, "종래 기술"이라 약칭함)에 개시되어 있는 것이다.Conventional technology for urea injection optimization is disclosed in Korean Patent Office Publication No. 10-2011-0052852 (published May 19, 2011) (name of the invention: urea injection optimization system) (hereinafter, abbreviated as "prior art"). It is.

개시된 종래 기술은 전자제어장치(ECU)와 연결되어, 엔진 속도, 엔진 부하, 차량 속도, 배출가스 온도, 배출가스량 등을 입력받아, 최대의 질소 산화물 저감률을 얻기 위한 우레아 분사량을 결정하여 우레아 분사 최적화를 구현하게 되는 것이다.The disclosed prior art is connected to an electronic control unit (ECU), receives an engine speed, an engine load, a vehicle speed, an exhaust gas temperature, an exhaust gas amount, and the like, and determines an urea injection amount to obtain a maximum nitrogen oxide reduction rate. You will implement the optimization.

특히, SCR촉매의 암모니아 흡착량 및 엔진운전 영역에 최적의 알파값(NH3/NOx, a ratio)를 결정하여 주어진 하드웨어에서 최대의 질소산화물 저감률을 얻는 방식이다.In particular, the optimum alpha value (NH3 / NOx, a ratio) is determined in the ammonia adsorption amount and engine operating region of the SCR catalyst to obtain the maximum reduction rate of nitrogen oxide in a given hardware.

하지만, 상기와 같은 종래의 기술은 배출가스의 유량에 대한 정보를 획득하기 위해 차량의 전자제어장치(ECU)와 캔(CAN) 을 통신으로 배출가스 유량에 대한 정보를 획득하기 때문에 추가적인 모델마다 재개발을 해야하는 단점이 있었다.However, since the conventional technology as described above obtains information on the exhaust gas flow rate by communicating the ECU and the CAN of the vehicle to obtain the information on the flow rate of the exhaust gas, it is redeveloped for each additional model. There was a downside to that.

이를 보완하기 위해 HFM(Hot Film Meter or film type air flow sensor)을 이용하여 흡기 공기량으로 배출가스 유량을 인식하며, 우레아 분사를 최적으로 제어하는 방식이 있는 것이다.In order to compensate for this, there is a method of recognizing the exhaust gas flow rate by the amount of intake air by using a hot film meter or a film type air flow sensor (HFM), and optimally controlling urea injection.

이와 같은 자동차용 배출가스 후처리시스템은 다음과 같은 문제점이 있었다.Such exhaust gas aftertreatment system for automobiles has the following problems.

즉, 차량의 전단 배기관 내부에서 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자를 혼합시켜 SCR을 통해 후단 배기관으로 배출시킬 경우, 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자가 충분히 SCR 촉매전단에 넓게 분포되지 않아 자동차용 배기가스 후처리시스템의 효율이 떨어지는 문제점이 있었다.That is, when the exhaust gas of the engine and the fine particles of urea injected from the urea injection injector are mixed inside the vehicle exhaust pipe and discharged to the rear exhaust pipe through the SCR, the fine particles of the urea injected from the engine exhaust gas and the urea injection injector Particles are not sufficiently distributed widely in the SCR catalyst shear, there is a problem that the efficiency of the exhaust gas after-treatment system for automobiles is reduced.

또한, 차량의 구조상 전단 배기관의 길이가 짧을 경우, 전단 배기관 내부에서 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자의 혼합률이 저하됨으로써, 자동차용 배기가스 후처리시스템의 효율이 떨어지는 문제점이 있었다.
In addition, when the length of the front end exhaust pipe is short due to the structure of the vehicle, the mixing ratio of the exhaust gas of the engine and the fine particles of urea injected from the urea injection injector inside the front end exhaust pipe decreases, thereby reducing the efficiency of the exhaust gas aftertreatment system for automobiles. There was a problem.

따라서 본 발명의 목적은 자동차의 배기가스 후처리 시스템 중 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자가 짧은 길이의 전단 배기관 내에서 유동이 분산됨에 따라 SCR 촉매전단에 넓게 분포되어 SCR을 통해 후단 배기관으로 배출될 수 있도록 전단 SCR 배기관의 질소산화물 센서와 온도센서 후방 내부에 다수 개의 날개부가 형성되는 블레이드 믹서를 구비함으로써, 차량의 전단 배기관 내부에서 엔진의 배출가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자를 혼합시켜 SCR을 통해 후단 배기관으로 배출시킬 경우, 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자가 충분히 유동이 분산됨에 따라 SCR 촉매전단에 넓게 분포되지 않아 자동차용 배기가스 후처리시스템의 효율이 떨어지는 문제점과, 차량의 구조상 전단 배기관의 길이가 짧을 경우, 전단 배기관 내부에서 엔진의 배출가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자의 혼합률이 저하됨으로써, 자동차용 배기가스 후처리시스템의 효율이 떨어지는 문제점을 효과적으로 해결할 수 있도록 한 자동차의 우레아 믹싱용 블레이드 믹서를 제공하는 데 있다.
Accordingly, an object of the present invention is to distribute the SCR catalyst shear widely as the fine particles of urea injected from the exhaust gas of the engine and the urea injection injector in the exhaust gas aftertreatment system of the automobile are dispersed in the short exhaust pipe. It is equipped with a blade mixer in which a plurality of blades are formed inside the rear of the nitrogen oxide sensor and the temperature sensor of the front SCR exhaust pipe so that the exhaust pipe can be discharged to the rear exhaust pipe. When the fine particles of urea are mixed and discharged to the downstream exhaust pipe through the SCR, the exhaust gas of the engine and the fine particles of urea injected from the urea injection injector are not widely distributed in the front of the SCR catalyst as the flow is dispersed sufficiently. Exhaust gas aftertreatment system If the length of the front end exhaust pipe is short due to the problems of the vehicle structure, the mixing rate of the exhaust gas of the engine and the fine particles of urea injected from the urea injection injector is lowered in the front end exhaust pipe, thereby increasing the efficiency of the exhaust gas aftertreatment system for automobiles. The present invention provides a blade mixer for urea mixing of an automobile, which can effectively solve the problem of falling.

이와 같은 본 발명은 자동차의 배기가스 후처리 시스템인 DPF(Diesel Particulate Filter)와 우레아 SCR(Selective Catalytic Reduction)사이에 위치하여 엔진의 배출가스와 인젝터에서 분사한 우레아 미세입자가 잘 섞이도록 만들어주는 자동차의 우레아 믹싱용 블레이드 믹서에 있어서, 일측에 DOC 온도센서가 설치되며 내부에 DOC 담체가 구비되는 DOC(Diesel oxidation catalyst);와 일측에 전단 질소산화물 센서와 SCR 전단 온도센서 및 우레아 분사 인젝터가 각각 구비되며, 일단은 DOC에 연결되어 DOC 담체가 내부로 유입되고, 타단은 SCR에 연결되는 전단 배기관;과 일측에 SCR 후단 온도센서와 후단 질소산화물 센서가 각각 구비되며, 일단이 SCR에 연결되는 후단 배기관과 전단 SCR 배기관의 질소산화물 센서와 온도센서 및 우레아 분사 인젝터 후방 내부에 구비되되, 전단 배기관의 내주면에서 중심으로 갈수록 각도가 틀어지는 다수 개의 날개부가 형성되는 블레이드 믹서;로 이루어지는 것을 특징으로 한다. The present invention is located between the diesel exhaust gas aftertreatment system DPF (Diesel Particulate Filter) and urea SCR (Selective Catalytic Reduction) to make a good mixture of the urea fine particles injected from the engine exhaust gas and the injector In the blade mixer for urea mixing, DOC temperature sensor is installed at one side and DOC (Diesel oxidation catalyst) having a DOC carrier therein; and shear nitrogen oxide sensor, SCR shear temperature sensor and urea injection injector at one side, respectively. One end is connected to the DOC DOC carrier is introduced into the inside, the other end is the front end exhaust pipe is connected to the SCR; and one side is provided with the SCR rear end temperature sensor and the rear end nitrogen oxide sensor, respectively, the rear end exhaust pipe is connected to the SCR And the nitrogen oxide sensor, temperature sensor and urea injection injector inside the front end SCR exhaust pipe. It characterized by comprising a; toward the center on the main surface angle teuleojineun plurality of blade portion blade mixer formed.

그리고, 전단 배기관 내부에 구비되는 블레이드 믹서를 전단 배기관의 내주면과 밀착되는 몸체부와, 몸체부로부터 다수 개의 날개부로 각각 형성하여, 블레이드 믹서의 위치를 조절할 수 있도록 형성하며, 전단 배기관 내부에 구비되는 블레이드 믹서의 날개부 형태를 몸체부에서 중심으로 갈수록 비틀어지게 형성하되, 각각의 날개부의 끝단이 모이는 중심에는 일정크기의 통공을 형성하여, 전단 배기관 내부에서 엔진의 배기가스와 우레아 미세입자가 잘 섞이도록 형성하며, 특히 전단 배기관 내부에 구비되는 블레이드 믹서를 전단 배기관과 일체로 형성하여, 배기시스템의 구조를 단순화함으로써 본 발명의 목적을 달성할 수 있는 것이다.
In addition, the blade mixer provided inside the shear exhaust pipe is formed into a body portion in close contact with the inner circumferential surface of the shear exhaust pipe and a plurality of wings from the body portion, respectively, and is formed to adjust the position of the blade mixer, and is provided inside the shear exhaust pipe. The blade shape of the blade mixer is twisted as it goes from the body to the center, and a certain size of through-holes is formed at the center of the end of each wing, so that the exhaust gas of the engine and the urea fine particles are mixed well in the shear exhaust pipe. It is possible to achieve the object of the present invention by simplifying the structure of the exhaust system by forming a lock, in particular the blade mixer provided inside the shear exhaust pipe integrally with the shear exhaust pipe.

이와 같은 본 발명은 전단 SCR 배기관의 질소산화물 센서와 온도센서 후방 내부에 다수 개의 날개부가 형성되는 블레이드 믹서를 구비하여, 자동차의 배기가스 후처리 시스템 중 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자가 짧은 길이의 전단 배기관 내에서 유동이 분산됨에 따라 SCR촉매전단에 넓게 분포되어 SCR을 통해 후단 배기관으로 배출되는 효과가 있는 것이다.The present invention includes a blade mixer in which a plurality of wings are formed inside the nitrogen oxide sensor and the temperature sensor in the front end SCR exhaust pipe, and the urea injected from the exhaust gas of the engine and the urea injection injector in the exhaust gas aftertreatment system of an automobile. As the microparticles of are dispersed in the front end exhaust pipe of short length, it is widely distributed in the front end of the SCR catalyst and is discharged to the rear end exhaust pipe through the SCR.

그리고, 차량의 구조상 전단 배기관의 길이가 짧을 경우에도 블레이드 믹서가 엔진의 배기가스와 우레아 분사 인젝터로부터 분사되는 우레아의 미세입자가를 잘 섞어줌으로써, 자동차용 배기가스 후처리시스템의 효율이 상승하는 효과도 있는 것이다.
In addition, even when the length of the front end exhaust pipe is short due to the structure of the vehicle, the blade mixer mixes finely the fine particles of urea injected from the engine exhaust gas and the urea injection injector, thereby increasing the efficiency of the exhaust gas aftertreatment system for automobiles. There is also.

도 1 은 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서가 설치되는 모습을 보여주는 개략도.
도 2 는 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서의 구조를 보여주는 사시도.
도 3 은 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서의 구조를 보여주는 정면도.
도 4 는 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서의 구조를 보여주는 측면도.
도 5 는 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서가 전단 배기관에 장착된 모습을 보여주는 정면도.
도 6 은 본 발명의 믹서에 의해 자동차 배출가스의 흐름상태와 농도변화를 도시한 도면.1 is a schematic view showing a state in which a blade mixer for urea mixing of an automobile according to the present invention is installed.
Figure 2 is a perspective view showing the structure of a blade mixer for urea mixing of a vehicle according to the present invention.
Figure 3 is a front view showing the structure of the blade mixer for urea mixing of the vehicle according to the present invention.
Figure 4 is a side view showing the structure of a blade mixer for urea mixing of a vehicle according to the present invention.
5 is a front view showing a state in which a blade mixer for urea mixing of a vehicle according to the present invention is mounted on a shear exhaust pipe;
6 is a view showing the flow state and the concentration change of the vehicle exhaust gas by the mixer of the present invention.

이하 본 발명의 특징을 효과적으로 달성할 수 있는 바람직한 실시 예로서 그 기술구성 및 작용효과를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

즉, 도 1 은 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서가 설치되는 모습을 보여주는 개략도이고, 도 2 는 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서의 구조를 보여주는 사시도, 도 3 은 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서의 구조를 보여주는 정면도이고, 도 4 는 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서의 구조를 보여주는 측면도이며, 도 5 는 본 발명에 따른 자동차의 우레아 믹싱용 블레이드 믹서가 전단 배기관에 장착된 모습을 보여주는 정면도이고, 도 6 은 본 발명의 믹서에 의해 자동차 배출가스의 흐름상태와 농도변화를 도시한 도면이다.That is, Figure 1 is a schematic diagram showing a state in which the blade mixer for urea mixing of the vehicle according to the invention is installed, Figure 2 is a perspective view showing the structure of the blade mixer for urea mixing of the vehicle according to the invention, Figure 3 is the present invention Figure 4 is a front view showing the structure of the blade mixer for urea mixing of the vehicle according to, Figure 4 is a side view showing the structure of the blade mixer for urea mixing of the vehicle according to the invention, Figure 5 is a blade for urea mixing of the vehicle according to the invention 6 is a front view showing a mixer mounted on a front end exhaust pipe, and FIG. 6 is a view illustrating a flow state and a concentration change of automobile exhaust gas by the mixer of the present invention.

이와 같은 본 발명은 자동차의 배기가스 후처리 시스템인 DPF(Diesel Particulate Filter)와 우레아 SCR(Selective Catalytic Reduction)사이에 위치하여 엔진의 배출가스와 인젝터에서 분사한 우레아 미세입자가 잘 섞이도록 만들어주는 자동차의 우레아 믹싱용 블레이드 믹서에 있어서, 일측에 DOC 온도센서(110)가 설치되며 내부에 DOC 담체가 구비되는 DOC(100);와 일측에 전단 질소산화물 센서(210)와 SCR 전단 온도센서(220) 및 우레아 분사 인젝터(250)가 각각 구비되며, 일단은 DOC(100)에 연결되어 DOC 담체가 내부로 유입되고, 타단은 SCR(300)에 연결되는 전단 배기관(200);으로 이루어지는 것을 특징으로 하는 것이다.The present invention is located between the diesel exhaust gas aftertreatment system DPF (Diesel Particulate Filter) and urea SCR (Selective Catalytic Reduction) to make a good mixture of the urea fine particles injected from the engine exhaust gas and the injector In the blade mixer for urea mixing, DOC temperature sensor 110 is installed on one side and DOC carrier is provided therein; shear nitrogen oxide sensor 210 and SCR shear temperature sensor 220 on one side And a urea injection injector 250 is provided, one end is connected to the DOC 100, DOC carrier is introduced into the inside, the other end is a shear exhaust pipe 200 is connected to the SCR (300); will be.

그리고, 일측에 SCR 후단 온도센서(410)와 후단 질소산화물 센서(420)가 각각 구비되며, 일단이 SCR(300)에 연결되는 후단 배기관(400);과 전단 배기관(200)의 전단 질소산화물 센서(210)와 SCR 전단 온도센서(220) 및 우레아 분사 인젝터(250) 후방 내부에 구비되되, 전단 배기관(200)의 내주면에서 중심으로 갈수록 각도가 틀어지는 다수 개의 날개부(550)가 형성되는 블레이드 믹서(500);로 이루어지며, 전단 배기관(200) 내부에 구비되는 블레이드 믹서(500)를 전단 배기관(200)의 내주면과 밀착되는 몸체부(510)와, 몸체부(510)로부터 다수 개의 날개부(550)로 각각 형성하여, 블레이드 믹서(500)의 위치를 조절할 수 있도록 한 것을 특징으로 하는 것이다.And, one end of the SCR rear end temperature sensor 410 and the rear end nitrogen oxide sensor 420 is provided, respectively, the rear end exhaust pipe 400 is connected to the SCR 300; and the front end nitrogen oxide sensor of the front end exhaust pipe 200 The blade mixer 210 and the SCR shear temperature sensor 220 and the urea injection injector 250 are provided inside the rear, and a blade mixer in which a plurality of wings 550 are formed at an angle from the inner circumferential surface of the shear exhaust pipe 200 toward the center thereof is formed. It consists of; 500, the body portion 510 is in close contact with the inner circumferential surface of the front end exhaust pipe 200, the blade mixer 500 provided in the front end exhaust pipe 200, a plurality of wings from the body portion 510 Formed by 550, it is characterized in that to adjust the position of the blade mixer 500.

또한, 전단 배기관(200) 내부에 구비되는 블레이드 믹서(500)의 날개부(550) 형태를 몸체부(510)에서 중심으로 갈수록 비틀어지게 형성하되, 각각의 날개부(550)의 끝단이 모이는 중심에는 일정크기의 통공(530)을 형성하여, 전단 배기관(200) 내부에서 엔진의 배기가스와 우레아 미세입자가 잘 섞이도록 형성하며, 전단 배기관(200) 내부에 구비되는 블레이드 믹서(500)를 전단 배기관(200)과 일체로 형성하여, 배기시스템의 구조를 단순화한 것을 특징으로 하는 것이다.In addition, the blade portion 550 of the blade mixer 500 provided in the front exhaust pipe 200 is formed to be twisted toward the center from the body portion 510, the center of the end of each wing portion 550 gathered The through-hole 530 of a predetermined size is formed in the shear exhaust pipe 200 to mix the exhaust gas of the engine and the urea fine particles well, and shear the blade mixer 500 provided in the shear exhaust pipe 200. It is formed integrally with the exhaust pipe 200, it characterized in that the structure of the exhaust system is simplified.

이와 같은 본 발명은 자동차의 우레아 믹싱용 블레이드 믹서에 관한 것이다.This invention relates to a blade mixer for urea mixing in a motor vehicle.

즉, 자동차의 배기가스가 DOC(100)를 통해 전단 배기관(200)으로 유입되는 것이다.That is, the exhaust gas of the vehicle is introduced into the front end exhaust pipe 200 through the DOC (100).

그리고, 전단 배기관(200)으로 유입되는 자동차의 배기가스는 SCR(300)을 통해 후단 배기관(400)으로 배출되는 것이다.The exhaust gas of the vehicle flowing into the front exhaust pipe 200 is discharged to the rear exhaust pipe 400 through the SCR 300.

이때, DOC(100) 일측에는 DOC 온도센서(110)가 구비되어 있고, 전단 배기관(200)에는 전단 질소산화물 센서(210)와 SCR 전단 온도센서(220) 및 우레아 분사 인젝터(250)가, 그리고 후단 배기관(400)에는 SCR 후단 온도센서(410)와 후단 질소산화물 센서(420)가 각각 설치되어 있어서, 제어기를 통해 자동차의 배기가스를 후처리 하는 것이다.At this time, one side of the DOC 100 is provided with a DOC temperature sensor 110, the front end exhaust pipe 200, the front end nitrogen oxide sensor 210, the SCR front end temperature sensor 220 and the urea injection injector 250, and The rear end exhaust pipe 400 is provided with an SCR rear end temperature sensor 410 and a rear end nitrogen oxide sensor 420, respectively, to post-process the exhaust gas of the vehicle through the controller.

이러한 자동차의 배기가스 후처리시스템 중 전단 배기관(200)에서 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자가 섞여 SCR(300)을 통해 후단 배기관(400)으로 배출되는데, 이때 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자가 충분히 섞이지 못하면 자동차의 배기가스 후처리시스템의 효율이 떨어지게 되는 것이다.In the exhaust gas aftertreatment system of the vehicle, the exhaust gas of the vehicle and the fine particles of urea injected through the urea injection injector 250 are mixed in the vehicle exhaust gas exhaust through the SCR 300 and discharged to the rear exhaust pipe 400. In this case, when the exhaust gas of the vehicle and the fine particles of the urea injected through the urea injection injector 250 are not sufficiently mixed, the efficiency of the exhaust gas aftertreatment system of the vehicle is reduced.

따라서, 전단 배기관(200)의 전단 질소산화물 센서(210)와 SCR 전단 온도센서(220) 및 우레아 분사 인젝터(250) 후방 내부에 블레이드 믹서(500)를 설치하게 되는 것이다.Therefore, the blade mixer 500 is installed inside the front end nitrogen oxide sensor 210, the SCR front end temperature sensor 220, and the urea injection injector 250 of the front end exhaust pipe 200.

즉, 자동차의 배기가스 후처리시스템 중 전단 배기관(200)에서 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자는 흐름 방향에 따라 전단 배기관(200)을 지나 SCR(300) 방향으로 흐르게 되는데, 전단 배기관(200) 내측에 스크류성 기류를 형성하는 블레이드 믹서(500)를 설치하여 자동차의 배기가스 후처리시스템 중 전단 배기관(200)에서 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자를 스크류성 기류로 섞게 되는 것이다.That is, the fine particles of the urea injected through the exhaust gas of the vehicle and the urea injection injector 250 in the front exhaust pipe 200 of the exhaust gas aftertreatment system of the vehicle pass through the front exhaust pipe 200 along the flow direction of the SCR (300). It is flowing in the direction, the front end exhaust pipe 200 is installed inside the blade mixer to form a screw-like air flow in the exhaust gas aftertreatment system of the exhaust exhaust pipe 200 of the vehicle exhaust gas and urea injection injector ( The fine particles of urea sprayed through 250 are mixed into a screw-like air stream.

특히, 블레이드 믹서(500)에는 외측인 몸체부(510)로부터 중심으로 갈수록 비틀린 형태의 다수 개의 날개부(550)가 형성되어 있어서, 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자를 효과적으로 섞이게 하는 것이다.In particular, the blade mixer 500 is formed with a plurality of wings 550 of the twisted form toward the center from the outer body portion 510, the urea is injected through the exhaust gas and urea injection injector 250 of the vehicle It is to effectively mix the fine particles of.

또한, 블레이드 믹서(500)의 중앙에는 통공(530)이 형성되어 있어서 전단 배기관(200) 내부에서 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자가 균일하게 섞이면서도 배출되는 시간이 지연되는 현상을 방지할 수 있게 되는 것이다.In addition, a through hole 530 is formed at the center of the blade mixer 500 to uniformly mix and discharge the exhaust gas of the vehicle and the fine particles of urea injected through the urea injection injector 250 inside the shear exhaust pipe 200. It is possible to prevent the time delay that occurs.

이러한 블레이드 믹서(500)는 전단 배기관(200)과 일체로 형성 가능하며, 또한 전단 배기관(200)과 각각 별도로 형성하여 차량의 생산단계에서 작업자가 블레이드 믹서(500)의 위치를 조절할 수도 있는 것이다.The blade mixer 500 may be formed integrally with the front end exhaust pipe 200, and may be formed separately from the front end exhaust pipe 200 so that the operator may adjust the position of the blade mixer 500 in the production stage of the vehicle.

그리고, 필요에 따라 블레이드 믹서(500)의 날개부(550)만 전단 배기관(200)의 내벽에 설치하여 자동차의 배기가스와 우레아 분사 인젝터(250)를 통해 분사되는 우레아의 미세입자를 혼합할 수도 있게 되는 것이다.Then, if necessary, only the blade 550 of the blade mixer 500 may be installed on the inner wall of the front exhaust pipe 200 to mix the exhaust gas of the vehicle and the fine particles of urea injected through the urea injection injector 250. Will be.

또한, 몸체부(510) 전방에 설치되는 각각의 날개부(550)는 시계 반대 방향으로 비틀어짐을 갖도록 믹서(500)에 형성하는 것이 바람직하다.
In addition, each wing 550 installed in front of the body 510 is preferably formed in the mixer 500 to have a twist in the counterclockwise direction.

100 : DOC 110 : DOC 온도센서
200 : 전단 배기관 210 : 전단 질소산화물 센서
220 : SCR 전단 온도센서 250 : 우레아 분사 인젝터
300 : SCR 400 : 후단 배기관
410 : SCR 후단 온도센서 420 : 후단 질소산화물 센서
500 : 블레이드 믹서 510 : 몸체부
530 : 통공 550 : 날개부100: DOC 110: DOC temperature sensor
200: shear exhaust pipe 210: shear nitrogen oxide sensor
220: SCR shear temperature sensor 250: urea injection injector
300: SCR 400: Rear end exhaust pipe
410: SCR trailing temperature sensor 420: trailing nitrogen oxide sensor
500: blade mixer 510: body
530: through hole 550: wing portion

Claims (5)

자동차의 배기가스 후처리 시스템인 DPF(Diesel Particulate Filter)와 우레아 SCR(Selective Catalytic Reduction)사이에 위치하여 엔진의 배출가스와 인젝터에서 분사한 우레아 미세입자가 잘 섞이도록 만들어주는 자동차의 우레아 믹싱용 블레이드 믹서에 있어서,
일측에 DOC 온도센서(110)가 설치되며 내부에 DOC 담체가 구비되는 DOC(100);와
일측에 전단 질소산화물 센서(210)와 SCR 전단 온도센서(220) 및 우레아 분사 인젝터(250)가 각각 구비되며, 일단은 DOC(100)에 연결되어 DOC 담체가 내부로 유입되고, 타단은 SCR(300)에 연결되는 전단 배기관(200);과
일측에 SCR 후단 온도센서(410)와 후단 질소산화물 센서(420)가 각각 구비되며, 일단이 SCR(300)에 연결되는 후단 배기관(400);과
전단 배기관(200)의 전단 질소산화물 센서(210)와 SCR 전단 온도센서(220) 및 우레아 분사 인젝터(250) 후방 및 SCR(300) 전방 내부에 구비되되, 전단 배기관(200)의 내주면에서 중심으로 갈수록 각도가 틀어지는 다수 개의 날개부(550)가 형성되는 블레이드 믹서(500);
로 이루어지는 것을 특징으로 하는 자동차의 우레아 믹싱용 블레이드 믹서.
Automotive urea mixing blades that are located between diesel exhaust filter (DPF) and Urea SCR (Selective Catalytic Reduction), which make the exhaust gas of the engine and the urea fine particles injected from the injector well mixed In the mixer,
DOC temperature sensor 110 is installed on one side and DOC (100) having a DOC carrier therein; and
One side is provided with a shear nitrogen oxide sensor 210, SCR shear temperature sensor 220 and urea injection injector 250, one end is connected to the DOC (100) DOC carrier is introduced into the inside, the other end is SCR ( Shear exhaust pipe 200 connected to 300; And
SCR rear end temperature sensor 410 and the rear end nitrogen oxide sensor 420 is provided on one side, respectively, the rear end exhaust pipe 400 is connected to the SCR 300;
Shear nitrogen oxide sensor 210, shear temperature sensor 220 and urea injection injector 250 and the front of the SCR (300) of the front end exhaust pipe 200 is provided in the inner circumferential surface of the front exhaust pipe 200 A blade mixer 500 in which a plurality of wing portions 550 are formed such that angles are gradually changed;
Blade mixer for urea mixing of a vehicle, characterized in that consisting of.
제 1 항에 있어서,
전단 배기관(200) 내부에 구비되는 블레이드 믹서(500)를 전단 배기관(200)의 내주면과 밀착되는 몸체부(510)와, 몸체부(510)로부터 다수 개의 날개부(550)로 각각 형성하여,
블레이드 믹서(500)의 위치를 조절할 수 있도록 한 것을 특징으로 하는 자동차의 우레아 믹싱용 블레이드 믹서.
The method of claim 1,
The blade mixer 500 provided in the front end exhaust pipe 200 is formed by the body part 510 which is in close contact with the inner circumferential surface of the front end exhaust pipe 200, and a plurality of wing parts 550 from the body part 510, respectively.
Blade mixer for urea mixing of a vehicle, characterized in that to adjust the position of the blade mixer (500).
제 1 항 또는 제 2 항에 있어서,
전단 배기관(200) 내부에 구비되는 블레이드 믹서(500)의 날개부(550) 형태를 몸체부(510)에서 중심으로 갈수록 비틀어지게 형성하되, 각각의 날개부(550)의 끝단이 모이는 중심에는 일정크기의 통공(530)을 형성하여,
전단 배기관(200) 내부에서 엔진의 배출가스와 우레아 미세입자가 잘 섞이도록 한 것을 특징으로 하는 자동차의 우레아 믹싱용 블레이드 믹서.
3. The method according to claim 1 or 2,
The blade portion 550 of the blade mixer 500 provided in the shear exhaust pipe 200 is formed to be twisted from the body portion 510 toward the center thereof, but the center of each wing portion 550 has a constant center. By forming a through hole 530 of size,
Blade mixer for urea mixing of a vehicle, characterized in that the exhaust gas of the engine and the urea fine particles are mixed well within the shear exhaust pipe (200).
제 1 항 또는 제 2 항에 있어서,
전단 배기관(200) 내부에 구비되는 블레이드 믹서(500)를 전단 배기관(200)과 일체로 형성하여,
배기시스템의 구조를 단순화한 것을 특징으로 하는 자동차의 우레아 믹싱용 블레이드 믹서.
3. The method according to claim 1 or 2,
By forming the blade mixer 500 provided in the front end exhaust pipe 200 integrally with the front end exhaust pipe 200,
Blade mixer for urea mixing in automobiles, characterized by a simplified structure of the exhaust system.
제 1 항에 있어서,
몸체부(510) 전방에 설치되는 각각의 날개부(550)는 시계 반대 방향으로 비틀어짐을 갖도록 믹서(500)에 형성 됨을 특징으로 하는 자동차의 우레아 믹싱용 블레이트 믹서.
The method of claim 1,
Each blade portion 550 installed in front of the body portion 510 is formed in the mixer 500 to have a twist in the counterclockwise direction, characterized in that the blender for urea mixing of a vehicle.
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