KR19990041978A - Automobile exhaust gas recirculation device - Google Patents

Automobile exhaust gas recirculation device Download PDF

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Publication number
KR19990041978A
KR19990041978A KR1019970062670A KR19970062670A KR19990041978A KR 19990041978 A KR19990041978 A KR 19990041978A KR 1019970062670 A KR1019970062670 A KR 1019970062670A KR 19970062670 A KR19970062670 A KR 19970062670A KR 19990041978 A KR19990041978 A KR 19990041978A
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South Korea
Prior art keywords
mixing chamber
intake
pipe
exhaust gas
intake pipe
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KR1019970062670A
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Korean (ko)
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KR100288759B1 (en
Inventor
김성은
Original Assignee
정몽규
현대자동차 주식회사
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Priority to KR1019970062670A priority Critical patent/KR100288759B1/en
Publication of KR19990041978A publication Critical patent/KR19990041978A/en
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Publication of KR100288759B1 publication Critical patent/KR100288759B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/002—EGR valve being controlled by vacuum or overpressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/003—EGR valve controlled by air measuring device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/004—EGR valve controlled by a temperature signal or an air/fuel ratio (lambda) signal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/005—EGR valve controlled by an engine speed signal

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

본 발명은 자동차의 배기가스 재순환장치에 관한 것이며, 상세하게는 배기가스와 신기의 혼합장치에 관한 것으로서, 흡기도관에 공급되는 배기가스와 신기의 혼합을 균일하게 하여 EGR 효과를 극대화 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation apparatus for automobiles, and more particularly, to an apparatus for mixing exhaust gas and fresh air, which maximizes the EGR effect by uniformly mixing the exhaust gas and fresh air supplied to the intake pipe.

본 발명에서 1은 엔진이고, 상기 엔진(1)에는 배기 파이프(2)와 흡기도관(3)이연결되어 있다.In the present invention, 1 is an engine, and an exhaust pipe 2 and an intake pipe 3 are connected to the engine 1.

4는 도관으로서 일단은 배기 파이프(2)에 연결되고 타단은 후술하는 혼합실(7)에 연결되어 있으며, 상기 도관(4)에는 EGR 밸브(5)를 설치한 것이다.4 is a conduit, one end of which is connected to the exhaust pipe 2, the other end of which is connected to a mixing chamber 7, which will be described later, and the conduit 4 is provided with an EGR valve 5.

6은 전자제어 유니트로서, 상기 전자제어 유니트(6)는 엔진 회전속도, 엔진온도, 흡입공기량, 흡기도관의 진공도 등에 의하여 제어하여 상기 EGR 밸브(5)를 개폐하는 것이다.6 is an electronic control unit. The electronic control unit 6 controls the engine rotation speed, the engine temperature, the intake air amount, the degree of vacuum in the intake pipe, and the like to open and close the EGR valve 5.

7은 혼합실로서, 상기 혼합실(7)은 흡기도관(3)의 주위에 설치하며, 상기 혼합실(7)로 포위되는 흡기도관(3)에는 후술하는 팬(9)의 전후에 신기 도입공(8a)과 혼합가스 유출공(8b)을 형성하여 흡기도관(3)과 혼합실(7)을 상호 연통한 것이다.7 is a mixing chamber, and the mixing chamber 7 is installed around the intake airway tube 3, and is introduced into the intake airway tube 3 surrounded by the mixing chamber 7 before and after the fan 9 described later. The holes 8a and the mixed gas outlet holes 8b are formed to communicate the intake air pipe 3 and the mixing chamber 7 with each other.

9는 팬으로서, 상기팬(9)은 흡기도관(3)에 그 보스(10)를 회전할 수 있게 지지하며, 상기 보스(10)의 내외측에 블레이드(11)(12)를 설치하여 내측 블레이드(11)는 흡기도관(3)에 위치시키고 외측 블레이드(12)는 상기 혼합실(7)에 위치시켜서, 상기 외측 블레이드(12)의 전후방에 1차 혼합실(13a)과 2차 혼합실(13b)을 형성하여서 된 것이다.9 is a fan, and the fan 9 supports the boss 10 so as to be rotatable in the intake airway tube 3, and the blades 11 and 12 are installed inside and outside the boss 10 to form an inner side. The blade 11 is located in the air intake pipe 3 and the outer blade 12 is located in the mixing chamber 7 so that the primary mixing chamber 13a and the secondary mixing chamber are located in front and rear of the outer blade 12. It was made by forming (13b).

Description

자동차의 배기가스 재순환장치Automobile exhaust gas recirculation device

본 발명은 자동차의 배기가스 재순환장치(exhaust gas recirulation, E·G·R)에 관한 것이며, 상세하게는 배기가스와 신기의 혼합장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation apparatus (E · G · R) of a motor vehicle, and more particularly, to an apparatus for mixing exhaust gas and novelty.

자동차 엔진을 연소효율이 가장 높은 이론 혼합비로 운전하면 탄화수소(HC)와 일산화탄소(CO)의 배출량은 감소하는데 비하여 질소산화물(NOx)의 배출량은 증가하므로 상기한 NOx의 배출량을 저감하기 위하여 배기가스의 일부를 흡기계통으로 재순환시켜 최고온도를 낮추는 배기가스 재순환장치가 사용되고 있다.When operating an automobile engine at the theoretical mixing ratio with the highest combustion efficiency, the emissions of hydrocarbons (HC) and carbon monoxide (CO) are reduced, while the emissions of nitrogen oxides (NOx) are increased. Exhaust gas recirculation equipment is used to reduce the maximum temperature by recirculating a portion to the intake cylinder.

상기한 배기가스 재순환장치는 도 1에서 참조되는 바와 같이 엔진(1)의 배기 파이프(2)와 흡기도관(3) 사이에 도관(4)을 연결하고, 상기 도관(4)에 EGR 밸브(5)를 설치하여 전자제어 유니트(6) 또는 흡기도관의 부압에 의하여 제어하며, 상기한 전자제어 유니트(6)는 엔진 회전속도, 엔진온도,흡입공기량, 흡기도관의 진공도 등에 의하여 NOx의 배출량이 많은 운전 영역에서 EGR 밸브(5)를 개방하므로서 배기가스를 재순환시키고 있다.The exhaust gas recirculation apparatus connects a conduit 4 between the exhaust pipe 2 of the engine 1 and the intake air pipe 3 as referred to in FIG. 1, and connects the EGR valve 5 to the conduit 4. ) By controlling the negative pressure of the electronic control unit (6) or the intake air pipe, and the electronic control unit (6) generates a large amount of NOx due to the engine rotation speed, engine temperature, intake air amount, vacuum degree of the intake air pipe, and the like. The exhaust gas is recycled by opening the EGR valve 5 in the operation region.

그러나 상기한 배기가스 재순환장치는 도관(4)이 흡기도관(3)에 연결만 되어 있기 때문에 배기가스와 신기의 혼합이 불균일하고, 시간이 경과함에 따라 배기가스 중의 고형물질이 도관(4)의 출구부분에 퇴적되는 것이다.However, in the above-described exhaust gas recirculation apparatus, since the conduit 4 is only connected to the intake pipe 3, the mixing of the exhaust gas and the air is nonuniform, and as time passes, the solid matter in the exhaust gas is removed from the conduit 4. It is deposited at the exit.

상기와 같은 현상이 발생되면 각 실린더마다 EGR 율이 다르게 되므로 엔진의 과부화와 열적부담이 증가되고, 배기가스 중의 CO와 HC의 량이 증가되는 등의 문제점이 있게 되는 것이다.When the above phenomenon occurs, the EGR rate is different for each cylinder, so that the engine is overloaded and thermally increased, and the amount of CO and HC in the exhaust gas is increased.

본 발명은 상기한 실정을 감안하여 흡기도관에 공급되는 배기가스와 신기의 혼합을 균일하게 하여 EGR 효과를 극대화한 자동차의 배기가스 재순환장치를 제공하는 것을 목적으로 한다.SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a vehicle exhaust gas recirculation apparatus in which the exhaust gas supplied to the intake air pipe and the new air are uniformly maximized to maximize the EGR effect.

상기한 목적을 달성하기 위하여, 본 발명은 엔진의 배기 파이프와 흡기도관을 연통하는 도관과, 상기 도관에 설치하여 도관을 개폐하는 EGR 밸브와, 상기 흡기도관의 주위에 흡기도관과 연통 설치되고 상기 도관을 연결한 혼합실과, 상기 흡기도관과 혼합실에 설치된 팬으로 구성한 것이다.In order to achieve the above object, the present invention provides a conduit for communicating the exhaust pipe of the engine and the intake pipe, an EGR valve installed in the conduit to open and close the conduit, and is installed in communication with the intake pipe around the intake pipe It consists of the mixing chamber which connected the conduit, and the fan provided in the said intake air conduit and the mixing chamber.

도 1은 본 발명의 실시예의 단면도.1 is a cross-sectional view of an embodiment of the present invention.

도 2는 본 발명의 실시예의 요부 확대 단면도.2 is an enlarged sectional view showing main parts of an embodiment of the present invention;

도 3은 본 발명의 실시예의 팬의 사시도.3 is a perspective view of a fan of an embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of Symbols for Main Parts of Drawings>

1 : 엔진 2 : 배기 파이프1: engine 2: exhaust pipe

3 : 흡기도관 4 : 도관3: intake pipe 4: conduit

5 : EGR 밸브 6 : 전자제어 유니트5: EGR valve 6: electronic control unit

7 : 혼합실 8a : 신기 도입공7: mixing chamber 8a: new air inlet

8b : 혼합가스 배출공 9 : 팬8b: mixed gas discharge hole 9: fan

10 : 보스 11, 12 : 내외측 블레이드10: boss 11, 12: inner and outer blade

13a, 13b : 1, 2차 혼합실13a, 13b: 1st and 2nd mixing chamber

도 1 및 도 2는 본 발명의 실시예의 단면도 및 그 확대 단면도이고, 도 3은 팬의 사시도로서, 1은 엔진이고, 상기 엔진(1)에는 배기 파이프(2)와 흡기도관(3)이 연결되어 있다.1 and 2 are a cross-sectional view and an enlarged cross-sectional view of an embodiment of the present invention, Figure 3 is a perspective view of a fan, 1 is an engine, the exhaust pipe 2 and the intake pipe 3 is connected to the engine 1 It is.

4는 도관으로서, 그 일단은 배기 파이프(2)에 연결되고 타단은 후술하는 혼합실(7)에 연결되어 있으며, 상기 도관(4)에는 EGR 밸브(5)를 설치한 것이다.4 is a conduit, one end of which is connected to the exhaust pipe 2 and the other end of which is connected to a mixing chamber 7 which will be described later, and the conduit 4 is provided with an EGR valve 5.

6은 전자제어 유니트로서, 상기 전자제어 유니트(6)는 엔진 회전속도, 엔진 온도, 흡입공기량, 흡기도관의 진공도 등에 의하여 제어하여 상기 EGR 밸브(5)를 개폐하는 것이며, 상기 EGR 밸브(5)는 전자제어 유니트(6) 대신 흡기도관의 부압에 의하여서만 제어할 수도 있는 것이다.6 denotes an electronic control unit, wherein the electronic control unit 6 controls the engine rotation speed, the engine temperature, the intake air amount, the degree of vacuum of the intake pipe, and the like to open and close the EGR valve 5, and the EGR valve 5 May be controlled only by the negative pressure of the air intake pipe instead of the electronic control unit 6.

7은 혼합실로서, 상기 혼합실(7)은 흡기도관(3)의 주위에 설치하며, 상기 혼합실(7)로 포위되는 흡기도관(3)에는 후술하는 팬(9)의 전후에 신기 도입공(8a)과 혼합가스 유출공(8b)을 형성하여 흡기도관(3)과 혼합실(7)을 상호 연통한 것이다.7 is a mixing chamber, and the mixing chamber 7 is installed around the intake airway tube 3, and is introduced into the intake airway tube 3 surrounded by the mixing chamber 7 before and after the fan 9 described later. The holes 8a and the mixed gas outlet holes 8b are formed to communicate the intake air pipe 3 and the mixing chamber 7 with each other.

9는 팬으로서, 상기 팬(9)은 흡기도관(3)에 그 보스(10)를 회전할 수 있게 지지하며, 상기 보스(10)의 내외측에 블레이드(11)(12)를 설치하여 내측 블레이드(11)는 흡기도관(3)에 위치시키고 외측 블레이드(12)는 상기 혼합실(7)에 위치시켜서 상기 외측 블레이드(12)에 의하여 그 전후방에 1차 혼합실(13a)과 2차 혼합실(13b)을 형구분 성형하여서 된 것이다.9 is a fan, and the fan 9 supports the boss 10 so as to be rotatable in the intake airway tube 3, and the blades 11 and 12 are installed inside and outside the boss 10 to form an inner side. The blade 11 is located in the intake airway tube 3 and the outer blade 12 is located in the mixing chamber 7 so as to be mixed with the primary mixing chamber 13a and the secondary mixing chamber 13a before and after by the outer blade 12. The yarn 13b is formed by mold division.

이상과 같은 본 발명은 엔진 회전속도 센서 등에서 발생된 신호를 전자제어 유니트(6)에 입력하고, 전자제어 유니트(6)에 기억된 맵 테이블과 비교하여 그 출력신호에 의하여 EGR 밸브(5)를 개방하면 연소실로부터 배출되는 배기가스가 도관(4)을 통하여 1차 혼합실(13a)에 도입됨과 동시에 흡기도관(3)을 통하여 유입되는 신기의 일부가 신기 도입공(8a)을 통하여 1차 혼합실(13a)에 유입되어서 배기가스와 신기가 1차 혼합된다.The present invention as described above inputs the signal generated by the engine speed sensor or the like into the electronic control unit 6, and compares the EGR valve 5 with the output signal by comparing it with the map table stored in the electronic control unit 6. When opened, the exhaust gas discharged from the combustion chamber is introduced into the primary mixing chamber 13a through the conduit 4, and at the same time, a part of the fresh air introduced through the intake air pipe 3 is primarily mixed through the fresh air introduction hole 8a. It flows into the chamber 13a, and exhaust gas and new air are mixed first.

그리고 흡기도관(3)으로 유입되는 신기의 관성 에너지에 의하여 내측 블레이드(11)가 회전함에 따라 외측 블레이드(12)가 회전하므로서 상기 1차 혼합된 혼합가스가 2차 혼합실(13b)에서 균일하게 혼합된 후 혼합가스 유출공(8b)을 통하여 흡기도관(3)으로 배출되면서 내측 블레이드(11)에 의하여 교반되어 신기와 재 혼합되는 것이다.The outer blade 12 rotates as the inner blade 11 rotates due to the inertia energy of the new air flowing into the intake pipe 3 so that the first mixed gas is uniformly mixed in the secondary mixing chamber 13b. After being mixed, it is agitated by the inner blade 11 while being discharged to the intake pipe 3 through the mixed gas outlet 8b, and is remixed with the new air.

상기와 같이 배기가스와 신기가 균일하게 혼합되어 각 실린더에 흡입되면 각 실린더의 EGR율이 동일하게 되기 때문에 엔진의 과부하와 열적부담이 경감됨과 동시에 배기가스는 1차 혼합실(13a)에 도입되어 신기와 혼합된 후 혼합가스 유출공(8b)으로 배출되므로서 혼합가스 유출공(8b) 주위에 고형물질이 퇴적하지 않으므로 CO와 HC의 배출량이 증가되지 않는 것이다.As described above, when the exhaust gas and the new air are uniformly mixed and sucked into each cylinder, the EGR ratio of each cylinder is the same, so that the overload and thermal burden of the engine are reduced, and the exhaust gas is introduced into the primary mixing chamber 13a. After being mixed with the new air and discharged into the mixed gas outlet 8b, solid materials do not accumulate around the mixed gas outlet 8b, and thus, emissions of CO and HC are not increased.

또한 상기한 바와 같이 배기가스와 신기를 균일하게 혼합함으로서 EGR율을 크게하여도 EGR 효과가 감소되지 않는 것이다.In addition, the EGR effect is not reduced even if the EGR ratio is increased by uniformly mixing the exhaust gas and the new air as described above.

이상과 같이 본 발명은 흡기도관의 주위에 흡기도관에연통되게 설치되고 도관을 연결한 혼합실을 형성하고, 흡기도관과 혼합실에 팬을 설치하여 배기가스와 신기를 균일하게 혼합하므로서 각 실린더의 EGR율이 동일하게 되기 때문에 엔진의 과부화와 열적부담이 경감되며, 흡기도관에 고형물질의 퇴적이 방지되어 CO와 HC의 배출이 증가되지 않고 EGR 효과를 극대화 할 수 있는 것이다.As described above, the present invention forms a mixing chamber connected to the intake air pipe and connected to the intake air pipe around the air intake pipe, and installs a fan in the intake air pipe and the mixing chamber to uniformly mix the exhaust gas and the new air, Since the EGR rate is the same, overload and thermal burden of the engine are alleviated, and solid matter is prevented from being deposited in the intake pipe, thereby maximizing the EGR effect without increasing CO and HC emissions.

또한 EGR율을 크게 하여도 EGR 효과가 감소되지 않으므로 환경공해의 저감을 양호하게 할 수 있는 등의 효과가 있는 것이다.In addition, even if the EGR ratio is increased, the effect of the EGR is not reduced. Thus, it is possible to improve the environmental pollution.

Claims (4)

엔진의 배기 파이프와 흡기도관을 연통하는 도관과, 상기 도관에 설치하여 도관을 개폐하는 EGR 밸브와, 상기 흡기도관의 주위에 흡기도관에 연통 설치되고 도관을 연결한 혼합실과, 상기 흡기도관과 혼합실에 설치된 팬으로 구성한 자동차의 배기가스 재순환장치.A conduit communicating with the exhaust pipe of the engine and an intake pipe, an EGR valve installed in the conduit to open and close the conduit, a mixing chamber connected to the intake pipe and connected to the intake pipe around the intake pipe, and mixed with the intake pipe Exhaust gas recirculation system for automobiles composed of fans installed in the room. 제 1항에 있어서, 팬은 흡기도관에 회전할 수 있게 지지된 보스와, 상기 보스의 내외측에 형성하여 흡기도관에 위치되는 내측 블레이드와 혼합실에 위치되는 외측 블레이드로 구성한 자동차의 배기가스 재순환장치.The exhaust gas recirculation of a vehicle according to claim 1, wherein the fan comprises a boss rotatably supported in the intake pipe, an inner blade formed on the inside and outside of the boss, and an outer blade located in the intake pipe and an outer blade located in the mixing chamber. Device. 제 1항에 있어서, 혼합실은 외측 블레이드에 의하여 1차 혼합실과 2차 혼합실을 구분 형성한 자동차의 배기가스 재순환장치.The exhaust gas recirculation apparatus of claim 1, wherein the mixing chamber is formed by separating the primary mixing chamber and the secondary mixing chamber by the outer blades. 제 3항에 있어서, 1차 혼합실과 2차 혼합실은 흡기도관에 신기 유입공과 혼합가스 배출공을 형성하여 흡기도관과 연통한 자동차의 배기가스 재순환장치.4. The exhaust gas recirculation apparatus of an automobile according to claim 3, wherein the primary mixing chamber and the secondary mixing chamber form a fresh air inlet hole and a mixed gas discharge hole in the intake air pipe, thereby communicating with the intake air pipe.
KR1019970062670A 1997-11-25 1997-11-25 Apparatus for recirculating exhaust gas of vehicle KR100288759B1 (en)

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