KR20080111818A - Measuring system vehicle of exhaust gas flow in automobile - Google Patents

Measuring system vehicle of exhaust gas flow in automobile Download PDF

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KR20080111818A
KR20080111818A KR1020070060231A KR20070060231A KR20080111818A KR 20080111818 A KR20080111818 A KR 20080111818A KR 1020070060231 A KR1020070060231 A KR 1020070060231A KR 20070060231 A KR20070060231 A KR 20070060231A KR 20080111818 A KR20080111818 A KR 20080111818A
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South Korea
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exhaust gas
flow rate
gas flow
measuring
vehicle
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KR1020070060231A
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Korean (ko)
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KR100909704B1 (en
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김홍석
이진욱
정용일
조규백
최현하
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한국기계연구원
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • G01F5/005—Measuring a proportion of the volume flow by measuring pressure or differential pressure, created by the use of flow constriction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
    • G01F9/001—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine with electric, electro-mechanic or electronic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

A device for measuring a flow rate of exhaust gas of a vehicle is provided to determine a required amount of additional fuel injection for recycling a smoke filtering unit. A measuring part(20) includes a static pressure obtaining part(21) measuring static pressure of an exhaust pipe(61) through which exhaust gas flows, and a dynamic pressure obtaining part(22) for measuring dynamic pressure of the pipe. A differential pressure sensor(30) measures a volumetric flow rate of the exhaust gas. A temperature sensor(40) measures a mass flow rate of the exhaust gas. An electronic control unit(50) is connected to the differential pressure sensor and the temperature sensor electrically.

Description

자동차 배출가스유량 측정장치{MEASURING SYSTEM VEHICLE OF EXHAUST GAS FLOW IN AUTOMOBILE}Vehicle exhaust gas flow measuring device {MEASURING SYSTEM VEHICLE OF EXHAUST GAS FLOW IN AUTOMOBILE}

도 1은 본 발명에 따른 자동차 배출가스유량 측정장치의 일실시예를 나타낸 개요도.1 is a schematic view showing an embodiment of a vehicle exhaust gas flow measuring apparatus according to the present invention.

도 2는 도 1을 적용한 일실시예를 나타낸 예시도.Figure 2 is an exemplary view showing an embodiment to which Fig. 1 is applied.

<도면의 주요부분에 대한 부호의 표시><Indication of symbols for main parts of drawing>

20: 측정부 21: 정압채취부20: measuring unit 21: static pressure collector

22: 동압채취부 30: 차압센서22: dynamic pressure collecting section 30: differential pressure sensor

40: 온도센서 50: 전자제어장치40: temperature sensor 50: electronic control device

60: 내연기관 61: 배기관60: internal combustion engine 61: exhaust pipe

70: 매연여과장치 71: DOC70: soot filtration device 71: DOC

72: DPF72: DPF

본 발명은 자동차 배출가스유량 측정장치에 관한 것으로서, 보다 상세하게는 매연여과장치를 구비하는 자동차에 설치되되, DOC와 DPF가 순차적으로 연결되어 형 성된 매연여과장치의 DPF 이후 배기관에 설치되며, 정압과 동압을 각각 측정하는 정압채취부와 동압채취부 및 상기 정/동압채취부 간의 차를 구하는 차압센서를 이용하여 배출가스 체적유량을 측정하고, 온도센서를 이용하여 배출가스 질량유량을 측정할 수 있도록 하여, 상기 매연여과장치 내에 포집된 매연의 양을 예측하고, 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정하는데 사용되도록 함으로써, 통상의 배출가스유량 측정장치보다 간편하고, 엔진의 성능 저하를 유발시키지 않는 자동차 배출가스유량 측정장치에 관한 것이다.The present invention relates to a vehicle exhaust gas flow rate measuring apparatus, and more particularly, is installed in a vehicle having a soot filtration device, DOC and DPF is installed in the exhaust pipe after the DPF of the soot filtration device formed by connecting sequentially, the positive pressure The exhaust gas volume flow rate can be measured using a differential pressure sensor that calculates the difference between the static pressure collector and the dynamic pressure collector and the static / dynamic pressure collector, respectively, and the dynamic pressure is measured using the temperature sensor. It is used to predict the amount of soot trapped in the soot filtration device and to determine the additional fuel injection amount required to regenerate the soot filtration device, which is simpler than a conventional exhaust gas flow measurement device and reduces the engine performance. The present invention relates to a vehicle exhaust gas flow rate measurement device that does not cause.

현대에는 환경의 오염에 대한 관심도가 높아지고 있는 가운데 자동차의 배출가스에 의한 대기오염은 차량의 수가 증가됨에 따라 계속 증가하고 있으며 최근 국내 자동차의 급격한 증가는 공해물질의 대량배출로 도시 대기환경을 크게 악화시키고 있다. 이렇게 교통수단에 의하여 배출되는 공해물질은 가솔린 차량보다 버스 및 트럭 등의 산업용으로 주로 사용되는 디젤차량이 공해물질 배출량이 많고 또한 차량의 운행거리가 길어 대기환경오염의 주원인으로 분석되었으며, 또한 입자상 물질(매연포함)에 의한 가시적인 불쾌감, 정신적인 피해, 물질적인 피해 등 국민생활에 많은 위해를 끼치고 있다.In modern times, there is a growing interest in environmental pollution, and the air pollution caused by the emission of automobiles continues to increase as the number of vehicles increases. Recently, the rapid increase of domestic automobiles has greatly deteriorated the urban air environment due to the large amount of pollutant emissions. I'm making it. The pollutants emitted by means of transportation are mainly used for industrial purposes such as buses and trucks, rather than gasoline vehicles. Violent discomfort, mental damage, and material damage caused by smoke (including soot) are causing a lot of harm to people's lives.

따라서 세계 여러 나라에서는 도시 대기질 개선을 위한 일환으로 차량에 의한 대기환경 오염의 저감을 위해 자동차의 유해가스 성분의 량을 법적으로 규제함으로 저공해 차량의 생산을 의무화하고 있는 실정이기에 다양한 매연여과장치 분야의 개발이 대두되고 있는 상황이다. Therefore, many countries in the world are mandating the production of low pollution vehicles by legally regulating the amount of harmful gas components of automobiles to reduce air pollution by vehicles as part of the improvement of urban air quality. Development is on the rise.

특히, 매연여과장치를 부착하는 자동차의 경우 매연여과장치 내에 포집된 매 연의 양을 예측하고 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정하기 위해 배출가스유량의 측정이 필요하다.In particular, for automobiles equipped with soot filters, exhaust gas flow measurements are required to predict the amount of soot trapped in the soot filter and to determine the additional fuel injection required to regenerate the soot filter.

통상적으로 자동차 배출가스유량을 측정하기 위해 오리피스(Orifice)나 벤츄리(Venturi)를 사용하지만 배압이 작용하여 엔진 성능 저하를 야기시키고, 기타 Hot wire film을 사용하여 공기유량을 측정할 수 있으나 이는 고가라는 것이 단점이 있다.Orifice or Venturi is commonly used to measure vehicle exhaust gas flow, but back pressure acts to reduce engine performance and other hot wire films can be used to measure air flow. It has a disadvantage.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 매연여과장치를 부착하는 자동차의 경우 매연여과장치 내에 포집된 매연의 양을 예측하고, 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정하기 위해 배출가스유량의 측정이 필요한데, 상호 간 분리된 정압채취부와 동압채취부로 이루어진 측정부와, 배출가스의 체적유량 및 질량유량을 측정할 수 있도록 하는 차압센서와 온도센서 및 상기 차압센서와 온도센서를 제어하는 전자제어장치로 구성되어, 상기 매연여과장치를 구성하는 DPF 후단에 설치되어 상기 매연여과장치 내에 포집된 매연의 양을 예측하고, 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정할 수 있도록 한 자동차 배출가스유량 측정장치를 제공하는데 있다. The present invention has been made to solve the above problems, an object of the present invention is to predict the amount of smoke collected in the smoke filter in the case of a vehicle attached to the smoke filter, and additionally necessary to regenerate the smoke filter In order to determine the fuel injection amount, it is necessary to measure the discharge gas flow rate, which is composed of a separate static pressure collecting part and a dynamic pressure collecting part, a differential pressure sensor and a temperature sensor for measuring the volume flow rate and mass flow rate of the exhaust gas It is composed of an electronic control device for controlling the differential pressure sensor and the temperature sensor, installed in the rear end of the DPF constituting the soot filtration device to predict the amount of soot collected in the soot filtration device, and further necessary to regenerate the soot filtration device It is to provide a vehicle exhaust gas flow measurement device to determine the fuel injection amount.

본 발명의 다른 목적 및 장점들은 하기에 설명될 것이며, 본 발명의 실시예에 의해 알게 될 것이다. 또한, 본 발명의 목적 및 장점들은 특허청구범위에 나타낸 수단 및 조합에 의해 실현될 수 있다.Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

본 발명은 상기의 목적을 달성하기 위해 아래의 특징을 갖는다.The present invention has the following features to achieve the above object.

본 발명에 따른 일 실시예는 양단부가 개구되어 매연여과장치가 부착된 자동차의 배기관과 배기관 사이에 설치되며, 배출가스가 유동되는 상기 배기관의 정압을 측정하는 정압채취부와, 상기 배기관의 동압을 측정하는 동압채취부로 이루어지는 측정부와; 상기 정압과 동압의 차를 구해 상기 배출가스의 체적유량을 측정할 수 있도록 하는 차압센서와; 상기 배출가스의 질량유량을 측정할 수 있도록 하는 온도센서와; 상기 차압센서 및 온도센서를 제어하도록 전기적으로 연결되는 전자제어장치; 로 이루어져 구성되는 것을 특징으로 한다.One embodiment according to the present invention is installed between the exhaust pipe and the exhaust pipe of the vehicle equipped with the smoke filter is open at both ends, the static pressure collector for measuring the static pressure of the exhaust pipe flows the exhaust gas, and the dynamic pressure of the exhaust pipe A measuring unit comprising a dynamic pressure collecting unit for measuring; A differential pressure sensor for obtaining a difference between the static pressure and the dynamic pressure and measuring a volume flow rate of the exhaust gas; A temperature sensor for measuring a mass flow rate of the exhaust gas; An electronic controller electrically connected to control the differential pressure sensor and the temperature sensor; Characterized in that consists of.

또한, 매연여과장치는 배출가스 내 유해한 가스를 산화하는 DOC와 배출되는 매연의 입자물질을 필터로 여과하고 이를 연소시키는 DPF가 순차적으로 결합되어 이루어지는 것을 특징으로 한다.In addition, the soot filtration device is characterized in that the DOC for oxidizing the harmful gas in the exhaust gas and the DPF for filtration and burning the particulate matter of the exhaust smoke with a filter sequentially.

또한, 정압채취부와 동압채취부는 상호 간 분리되어, 가공이 용이하도록 하는 것을 특징으로 한다.In addition, the static pressure collector and the dynamic pressure collector is separated from each other, characterized in that for easy processing.

또한, 자동차 배출가스유량 측정장치는 DPF 후단에 위치되어 상기 매연여과장치 내에 포집된 매연의 양을 예측하는 것을 특징으로 한다.In addition, the vehicle exhaust gas flow rate measuring device is located at the rear end of the DPF, it characterized in that to predict the amount of smoke collected in the smoke filter.

또한, 자동차 배출가스유량 측정장치는 DPF 후단에 위치되어 상기 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정하는 것을 특징으로 한다.In addition, the vehicle exhaust gas flow rate measuring device is located at the rear end of the DPF, characterized in that for determining the additional fuel injection amount required to regenerate the smoke filter.

이하 첨부된 도면을 참조로 본 발명의 바람직한 실시예를 상세히 설명하도록 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사 전적인 의미로 한정해서 해석되어서는 아니되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

이하 도 1 또는 도 2를 참조하여 본 발명의 바람직한 실시예에 따른 자동차 배출가스유량 측정장치를 설명하도록 한다.Hereinafter, an automobile exhaust gas flow rate measuring apparatus according to a preferred embodiment of the present invention will be described with reference to FIG. 1 or FIG. 2.

도시한 바와 같이, 본 발명에 따른 자동차 배출가스유량 측정장치는 자동차 배기관 내의 정압과 유압의 차를 이용하여 배출가스 체적유량을 측정하고, 온도센서를 이용하여 배출가스 질량유량을 측정할 수 있도록 구성하여, 매연여과장치가 부착되는 자동차의 상기 매연여과장치 내에 포집되는 매연의 양을 예측하고, 상기 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정할 수 있도록 측정장치에 관한 것으로, 정압채취부(21), 동압채취부(22), 측정부(20), 차압센서(30), 온도센서(40), 전자제어장치(50)를 포함한다.As shown, the vehicle exhaust gas flow rate measuring apparatus according to the present invention is configured to measure the exhaust gas volume flow rate using the difference between the static pressure and the hydraulic pressure in the vehicle exhaust pipe, and to measure the exhaust gas mass flow rate using a temperature sensor. The present invention relates to a measuring device for predicting the amount of soot collected in the soot filter device of a vehicle to which the soot filter device is attached, and determining an additional fuel injection amount required to regenerate the soot filter device. ), The dynamic pressure collecting unit 22, the measuring unit 20, the differential pressure sensor 30, the temperature sensor 40, and the electronic controller 50.

도 1은 본 발명에 따른 자동차 배출가스유량 측정장치의 일실시예를 나타낸 개요도로서, 동 도면에서 보는 바와 같이 본 발명의 자동차 배출가스유량 측정장치(10)는 자동차 배기관(61)에 설치되되, 상기 배기관(61)을 절단한 후 그 사이에 결합시켜 상기 배기관(61) 내부에 유동되는 배출가스(매연)(E)의 체적유량과 질량 유량을 측정할 수 있도록 한다.Figure 1 is a schematic view showing an embodiment of the vehicle exhaust gas flow rate measuring apparatus according to the present invention, the vehicle exhaust gas flow rate measuring apparatus 10 of the present invention is installed in the vehicle exhaust pipe 61, as shown in the figure The exhaust pipe 61 is cut and then coupled therebetween so that the volume flow rate and the mass flow rate of the exhaust gas (soot) E flowing in the exhaust pipe 61 can be measured.

상기 배기관(61)으로부터 유입되어 상기 자동차 배출가스유량 측정장치(10)를 길이방향으로 유동하는 배출가스(E)의 체적유량을 구할 수 있도록, 정압채취부(21)와 동압채취부(22)로 이루어진 측정부(20)를 구성한다.The static pressure collector 21 and the dynamic pressure collector 22 to obtain a volume flow rate of the exhaust gas E flowing from the exhaust pipe 61 and flowing in the vehicle exhaust gas flow rate measuring device 10 in the longitudinal direction. Configure the measuring unit 20 made of.

상기 정압채취부(21) 및 동압채취부(22)는 각각의 일측을 상기 자동차 배출가스유량 측정장치(10) 내부로 유입시켜 상기 배기관(61)의 정압(靜壓)과 동압(動壓)을 각각 구하도록 한다.The positive pressure collecting unit 21 and the dynamic pressure collecting unit 22 respectively introduce one side into the vehicle exhaust gas flow measuring apparatus 10 so as to be equal to the positive pressure of the exhaust pipe 61 and the dynamic pressure. Get each of them.

상기 구해진 값은 상기 정압채취부(21) 및 동압채취부(22)가 모두 연결된 차압센서(30)로 전해지고, 상기 차압센서(30)에서 정압과 동압의 차를 구하여 배출가스의 체적유량을 측정할 수 있도록 한다.The obtained value is transmitted to the differential pressure sensor 30 to which both the static pressure collector 21 and the dynamic pressure collector 22 are connected, and the volumetric flow rate of the exhaust gas is measured by obtaining a difference between the static pressure and the dynamic pressure from the differential pressure sensor 30. Do it.

그 원리는 유동의 정압과 동압의 차로 유량을 측정한다는 면에서 일반적인 피토관(Pitot Tobe)과 동일하다.Its principle is the same as that of a conventional Pitot Tobe in that the flow rate is measured by the difference between the static pressure and the dynamic pressure of the flow.

하지만, 상기 피토관과 달리 본 발명에 따른 정압채취부(21)와 동압채취부(22)는 서로 일정간격 이격되어 상호 간 분리 형성됨으로 인해 가공이 용이하도록 한다.However, unlike the pitot tube, the positive pressure collector 21 and the dynamic pressure collector 22 according to the present invention are easily spaced apart from each other by being separated from each other to facilitate processing.

또한, 온도센서(40)를 상기 배출가스(E)가 유동되는 내부로 일측을 결합하여 상기 배출가스의 질량유량을 측정하도록 한다.In addition, the temperature sensor 40 is coupled to one side into which the exhaust gas E flows to measure the mass flow rate of the exhaust gas.

더불어, 상기 온도센서(40) 및 차압센서(30)와 전기적으로 연결되어 상기 두 개의 센서를 제어하는 전자제어장치(50)를 구비하도록 한다.In addition, the electronic sensor 50 is electrically connected to the temperature sensor 40 and the differential pressure sensor 30 to control the two sensors.

상기와 같이 구성되어 본 발명에 따른 자동차 배출가스유량 측정장치(10)는 통상의 경우보다 간편할 뿐만 아니라, 엔진의 성능 저하를 유발하지 않는다.The vehicle exhaust gas flow rate measuring device 10 according to the present invention configured as described above is not only simpler than usual, but also does not cause performance deterioration of the engine.

도 2는 도 1을 적용한 일실시예를 나타낸 예시도로서, 동 도면에서 보는 바와 같이 상기 도 1에서와 같이 구성된 본 발명에 따른 자동차 배출가스유량 측정장치(10)를 매연여과장치(70)가 설치된 자동차의 배기관(61)에 결합시킨 일실시예를 도시하고 있다.FIG. 2 is an exemplary view showing an embodiment to which FIG. 1 is applied. As illustrated in FIG. 1, a soot filtration device 70 includes a vehicle exhaust gas flow rate measuring device 10 according to the present invention configured as shown in FIG. 1. An embodiment in which the exhaust pipe 61 of the installed vehicle is coupled is shown.

상기 도 2를 살펴보면 내연기관(60)과 연결되는 배기관(61)은 DOC(Diesel Oxidation Catalyst, 산화촉매)(71)와 DPF(Diesel Particulate Filter trap, 매연여과필터)(72)가 순차적으로 결합되어 이루어진 매연여과장치(70)와 연결되어 있다.Referring to FIG. 2, the exhaust pipe 61 connected to the internal combustion engine 60 includes a DOC (Diesel Oxidation Catalyst) and a DPF (Diesel Particulate Filter trap) 72 sequentially connected to each other. It is connected with the soot filtration device 70 made.

상기 DOC(71)는 배출가스(E) 내 유해한 가스를 산화하고, 상기 DPF(72)는 배출되는 매연의 입자물질을 필터로 여과하고 이를 연소시키는 작용을 한다.The DOC 71 oxidizes harmful gas in the exhaust gas E, and the DPF 72 filters the particulate matter of the exhaust gas through a filter and burns it.

상기 도 2에서 같이, 도 1에 도시된 바로 구성된 본 발명에 다른 자동차 배출가스유량 측정장치(10)를 상기 매연여과장치(70)를 구성하는 요소 중 DPF(72) 후단에 위치되도록 자동차 배기관(61)에 연결하도록 한다.As shown in FIG. 2, the vehicle exhaust gas flow measuring device 10 according to the present invention configured as shown in FIG. 1 is positioned at the rear end of the DPF 72 among the elements constituting the soot filtration device 70 ( 61).

이로써, 상기 매연여과장치(70)를 거친 후 이동된 배출가스의 유량을 측정함으로써 전단에 위치된 상기 매연여과장치(70) 내에 포집된 매연의 양을 예측할 수 있을 뿐만 아니라, 상기 DOC(71) 전단에 연료를 분사하고, 상기 DOC(71)에서의 산화반응을 유도하여 DPF(72)를 재생하는데 필요한 열을 얻는 매연여과장치(70)의 특성상, 본 발명에 따른 배출가스유량 측정장치(10)는 상기 매연여과장치(70)를 재생 하는데 필요한 추가 연료분사량을 결정하는데 사용될 수 있다. Thus, by measuring the flow rate of the exhaust gas moved after passing through the soot filtration device 70, it is possible to predict the amount of soot trapped in the soot filtration device 70 located at the front end, the DOC (71) Due to the characteristics of the soot filtration device 70 which injects fuel to the front end and induces an oxidation reaction in the DOC 71 to obtain heat required to regenerate the DPF 72, the exhaust gas flow rate measuring device 10 according to the present invention 10 ) May be used to determine the additional fuel injection amount required to regenerate the soot filtration device 70.

이상과 같이, 본 발명의 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되진 않으며 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술 사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변경이 가능함은 물론이다.As described above, although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Various modifications and changes may be made without departing from the scope of the appended claims.

이상에서 살펴본 바와 같이, 본 발명은 본 발명은 매연여과장치를 부착하는 자동차의 경우 매연여과장치 내에 포집된 매연의 양을 예측하고, 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정하기 위해 배출가스유량의 측정이 필요한데, 상호간 분리된 정압채취부와 동압채취부로 이루어진 측정부 및 차압센서와 온도센서를 이용하여 배출가스 체적유량 및 질량유량을 측정할 수 있는 효과가 있다.As described above, the present invention is exhaust gas to predict the amount of smoke collected in the smoke filter in the case of a vehicle equipped with the smoke filter, and to determine the amount of additional fuel injection required to regenerate the smoke filter The measurement of the flow rate is required, and there is an effect that the volumetric flow rate and the mass flow rate of the exhaust gas can be measured by using a measurement unit consisting of a separate static pressure collector and a dynamic pressure collector and a differential pressure sensor and a temperature sensor.

또한, 본 발명은 매연여과장치를 구성하는 DPF 후단에 설치되어 상기 매연여과장치 내에 포집된 매연의 양을 예측하고, 매연여과장치를 재생하는데 필요한 추가 연료분사량을 결정할 수 있는 효과가 있다. In addition, the present invention has an effect that can be installed at the rear end of the DPF constituting the soot filtration device to predict the amount of soot collected in the soot filtration device, and determine the amount of additional fuel injection required to regenerate the soot filtration device.

Claims (5)

양단부가 개구되어 매연여과장치(70)가 부착된 자동차의 배기관(61)과 배기관(61) 사이에 설치되며,Both ends are opened and installed between the exhaust pipe 61 and the exhaust pipe 61 of the vehicle to which the smoke filtration device 70 is attached. 배출가스가 유동되는 상기 배기관(61)의 정압을 측정하는 정압채취부(21)와, 상기 배기관(61)의 동압을 측정하는 동압채취부(22)로 이루어지는 측정부(20)와;A measuring unit 20 including a static pressure collector 21 for measuring the static pressure of the exhaust pipe 61 through which the exhaust gas flows, and a dynamic pressure collector 22 for measuring the dynamic pressure of the exhaust pipe 61; 상기 정압과 동압의 차를 구해 상기 배출가스의 체적유량을 측정할 수 있도록 하는 차압센서(30)와;A differential pressure sensor 30 for obtaining a difference between the static pressure and the dynamic pressure and measuring a volume flow rate of the exhaust gas; 상기 배출가스의 질량유량을 측정할 수 있도록 하는 온도센서(40)와;A temperature sensor 40 to measure the mass flow rate of the exhaust gas; 상기 차압센서(30) 및 온도센서(40)를 제어하도록 전기적으로 연결되는 전자제어장치(50);An electronic controller (50) electrically connected to control the differential pressure sensor (30) and the temperature sensor (40); 로 이루어져 구성되는 것을 특징으로 하는 자동차 배출가스유량 측정장치. Automobile exhaust gas flow rate measurement device, characterized in that consisting of. 제 1항에 있어서,The method of claim 1, 상기 매연여과장치(70)는 배출가스 내 유해한 가스를 산화하는 DOC(71)와, 배출되는 매연의 입자물질을 필터로 여과하고 이를 연소시키는 DPF(72)가 순차적으로 결합되어 이루어지는 것을 특징으로 하는 자동차 배출가스유량 측정장치. The soot filtration device 70 is characterized in that the DOC (71) for oxidizing the harmful gas in the exhaust gas, and the DPF (72) for filtering and burning the particulate matter of the exhaust smoke with a filter in sequence Automobile exhaust gas flow measuring device. 제 1항에 있어서,The method of claim 1, 상기 정압채취부(21)와 동압채취부(22)는 상호 간 분리되어, 가공이 용이하 도록 하는 것을 특징으로 하는 자동차 배출가스유량 측정장치. The static pressure collector 21 and the dynamic pressure collector 22 are separated from each other, so as to facilitate processing, the vehicle exhaust gas flow rate measuring apparatus. 제 1항 또는 제 2항에 있어서,The method according to claim 1 or 2, 상기 자동차 배출가스유량 측정장치(10)는 DPF(72) 후단에 위치되어 상기 매연여과장치(70) 내에 포집된 매연의 양을 예측하는 것을 특징으로 하는 자동차 배출가스유량 측정장치.The vehicle exhaust gas flow rate measuring device (10) is located at the rear end of the DPF (72), the vehicle exhaust gas flow rate measuring device, characterized in that for predicting the amount of smoke collected in the soot filter (70). 제 1항 또는 제 2항에 있어서,The method according to claim 1 or 2, 상기 자동차 배출가스유량 측정장치(10)는 DPF(72) 후단에 위치되어 상기 매연여과장치(70)를 재생하는데 필요한 추가 연료분사량을 결정하는 것을 특징으로 하는 자동차 배출가스유량 측정장치.The vehicle exhaust gas flow rate measuring device (10) is located at the rear end of the DPF (72), the vehicle exhaust gas flow rate measuring device, characterized in that for determining the additional fuel injection amount required to regenerate the soot filter (70).
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KR20190045710A (en) * 2017-10-24 2019-05-03 현대자동차주식회사 Apparatus and method for maneuver platooning of vehicle
WO2020149599A1 (en) * 2019-01-17 2020-07-23 필즈엔지니어링 주식회사 Flowmeter, method for measuring flow rate using flowmeter, flowmeter correcting device, and method for correcting flowmeter by said device

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JP4092913B2 (en) * 2002-01-10 2008-05-28 三菱自動車工業株式会社 Integrated control unit for exhaust purification system of diesel engine
JP2004117261A (en) * 2002-09-27 2004-04-15 Horiba Ltd Vehicle mounted type gas analyzing apparatus
KR20070002728A (en) * 2005-06-30 2007-01-05 에스케이 주식회사 Exhaust gas treatment system for low exhaust temp. vehicle

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KR20190045710A (en) * 2017-10-24 2019-05-03 현대자동차주식회사 Apparatus and method for maneuver platooning of vehicle
WO2020149599A1 (en) * 2019-01-17 2020-07-23 필즈엔지니어링 주식회사 Flowmeter, method for measuring flow rate using flowmeter, flowmeter correcting device, and method for correcting flowmeter by said device

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