KR20020055626A - Device for recycling exhaust gas - Google Patents

Device for recycling exhaust gas Download PDF

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Publication number
KR20020055626A
KR20020055626A KR1020000084822A KR20000084822A KR20020055626A KR 20020055626 A KR20020055626 A KR 20020055626A KR 1020000084822 A KR1020000084822 A KR 1020000084822A KR 20000084822 A KR20000084822 A KR 20000084822A KR 20020055626 A KR20020055626 A KR 20020055626A
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South Korea
Prior art keywords
exhaust gas
intake
pipe
suction
egr
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KR1020000084822A
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Korean (ko)
Inventor
류시혁
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이계안
현대자동차주식회사
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Priority to KR1020000084822A priority Critical patent/KR20020055626A/en
Publication of KR20020055626A publication Critical patent/KR20020055626A/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
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • 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

PURPOSE: An Exhaust Gas Recirculation(EGR) device is provided to reduce the number of parts and cost by removing a bypass pipe, an EGR valve, a venturi and a throttle valve, and to simplify an intake route. CONSTITUTION: An EGR device is composed of an exhaust gas suction pipe(38) for connecting an EGR cooler(22) to an intake pipe(10), and a suction unit(30). The suction unit(30) includes a suction fan installed in the exhaust gas suction pipe(38) and sucking/exhausting the exhaust gas, and an electric-powered motor for driving the suction fan by a control signal of an ECU(40).

Description

배기가스 재순환장치{Device for recycling exhaust gas}Device for recycling exhaust gas

본 발명은 배기가스 재순환장치에 관한 것으로서, 더욱 상세하게는 배기측으로부터 배기가스의 일부를 취하여 엔진의 연소실로 재순환토록 하는 배기가스 재순환장치에 있어서, ECU의 제어를 받는 전동식 모터와, 전동식 모터의 구동축에 장착ㆍ구동되어 배기가스를 흡입ㆍ송출하는 흡입용 팬으로 구성되어 ECU의 제어신호에 따라 조절된 양의 배기가스가 재순환되도록 한 흡입장치부를 채용함으로써, 바이패스 파이프 및 EGR 밸브, 벤츄리, 드로틀 밸브를 삭제할 수 있어 부품수 감소 및 원가 절감을 이룰 수 있고, 흡기루트를 단순화시킬 수 있는 배기가스 재순환장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation apparatus, and more particularly, to an exhaust gas recirculation apparatus that takes a part of the exhaust gas from the exhaust side and recycles it to the combustion chamber of the engine. It consists of a suction fan mounted and driven on the drive shaft to suck and discharge the exhaust gas, and adopts a suction device to recycle the exhaust gas regulated according to the control signal of the ECU, thereby bypassing pipes, EGR valves, venturis, The present invention relates to an exhaust gas recirculation device capable of eliminating a throttle valve, thereby reducing component count and cost, and simplifying an intake route.

일반적으로 배기가스 재순환(Exhaust Gas Recycling)장치는 고온의 연소온도에서 발생하게 되는 질소산화물을 감소시키기 위해 배기가스의 일부를 흡입다기관으로 재순환시켜 엔진의 연소실에 공급하는 장치이다.In general, an exhaust gas recycling device is a device that recycles a part of exhaust gas to an intake manifold to supply a combustion chamber of an engine to reduce nitrogen oxides generated at a high combustion temperature.

배기가스의 일부가 연소실에 재유입되면 산소의 농도를 감소시켜 최대연소온도를 낮추게 되고, 질소산화물을 희석시킬 수 있는 이산화탄소를 증가시켜 질소산화물의 발생을 억제하게 된다.When a part of the exhaust gas is re-introduced into the combustion chamber, the concentration of oxygen is reduced to lower the maximum combustion temperature, and the generation of carbon dioxide can be suppressed by increasing carbon dioxide which can dilute nitrogen oxides.

그러나, 엔진 특성상 엔진이 고속영역인 경우 배기압력이 흡기압력보다 높아 원활한 배기가스의 재순환이 일어날 수 있으나, 저속영역인 경우에는 배기압력이 흡기압력보다 낮아 배기가스의 재순환이 이루어질 수 없게 된다.However, due to the characteristics of the engine, when the engine is in the high speed region, the exhaust pressure is higher than the intake pressure, so that smooth exhaust gas recirculation may occur. However, in the low speed region, the exhaust pressure is lower than the intake pressure so that the exhaust gas is not recycled.

따라서, 엔진의 저속영역에서도 배기가스가 원활하게 재순환되도록 설치되는 배기가스 재순환장치는 다음과 같이 구성된다.Therefore, the exhaust gas recirculation apparatus installed so that the exhaust gas is smoothly recycled even in the low speed region of the engine is configured as follows.

첨부한 도 3은 종래의 배기가스 재순환장치의 구성을 나타내는 장치구성도이다.3 is a device configuration diagram showing the configuration of a conventional exhaust gas recirculation apparatus.

이에 도시한 바와 같이, 흡기파이프(10)에는 바이패스 파이프(28)가 설치된다.As shown in the drawing, the intake pipe 10 is provided with a bypass pipe 28.

상기 흡기파이프에는 바이패스 파이프(28)에서의 배기가스 재순환을 조절하기 위해 드로틀 밸브(12)가 설치되고, 바이패스 파이프(28)에는 벤츄리(26)가 설치된다.The intake pipe is provided with a throttle valve 12 to regulate exhaust gas recirculation in the bypass pipe 28, and a venturi 26 is installed in the bypass pipe 28.

이때, 배기측(20)에서 취해진 배기가스는 이를 냉각하기 위한 EGR 쿨러(22)와, 상기 EGR 쿨러(22)와 연결된 EGR 밸브(24)를 통과하여 벤츄리(26)로 유입된다.At this time, the exhaust gas taken from the exhaust side 20 flows into the venturi 26 through the EGR cooler 22 for cooling it and the EGR valve 24 connected to the EGR cooler 22.

엔진이 저속일 경우에는 흡기파이프(10)에 설치된 드로틀 밸브(12)를 닫아 바이패스 파이프(28)의 벤츄리(26)로 많은 흡기를 흐르게 하고, 이를 통해 벤츄리(26)에서 부압을 증가시켜 EGR 밸브(24)를 통과한 배기가스가 벤츄리(26)를 통해 흡기측으로 원활히 흐를 수 있도록 한다.When the engine is at a low speed, the throttle valve 12 installed in the intake pipe 10 is closed to allow a large amount of intake air to flow into the venturi 26 of the bypass pipe 28, thereby increasing the negative pressure in the venturi 26 to increase the EGR. Exhaust gas passing through the valve 24 is allowed to flow smoothly to the intake side through the venturi (26).

엔진이 고속일 경우에는 상기 드로틀 밸브(12)를 열어 흡기파이프(10)에 걸리는 저항을 줄여 흡기손실을 막게 되는데, 이때는 바이패스 파이프(28)의 벤츄리(26)로 흐르는 흡기압력이 배기압력보다 낮기 때문에 EGR 밸브(24)를 통과한 배기가스가 벤츄리(26)를 통해 흡기측으로 원활히 흐를 수 있게 된다.When the engine is at high speed, the throttle valve 12 is opened to reduce the resistance of the intake pipe 10 to prevent intake loss. In this case, the intake pressure flowing through the venturi 26 of the bypass pipe 28 is greater than the exhaust pressure. Since it is low, the exhaust gas which passed the EGR valve 24 can flow smoothly to the intake side through the venturi 26.

그러나, 상기와 같이 이루어진 종래의 배기가스 재순환장치에서는 바이패스 파이프(28) 및 EGR 밸브(24), 벤츄리(26), 드로틀 밸브(12) 등을 설치해야 하는 등 부품수 증가와 비용 증대가 발생하는 문제점이 있었다.However, in the conventional exhaust gas recirculation apparatus made as described above, an increase in the number of parts and an increase in cost, such as a bypass pipe 28, an EGR valve 24, a venturi 26, a throttle valve 12, and the like, are required. There was a problem.

본 발명은 상기와 같은 문제점을 감안하여 안출한 것으로서, 배기측으로부터 배기가스의 일부를 취하여 엔진의 연소실로 재순환토록 하는 배기가스 재순환장치에 있어서, ECU의 제어를 받는 전동식 모터와, 전동식 모터의 구동축에 장착ㆍ구동되어 배기가스를 흡입ㆍ송출하는 흡입용 팬으로 구성되어 ECU의 제어신호에 따라 조절된 양의 배기가스가 재순환되도록 한 흡입장치부를 채용함으로써, 바이패스 파이프 및 EGR 밸브, 벤츄리, 드로틀 밸브를 삭제할 수 있어 부품수 감소 및 원가 절감을 이룰 수 있고, 흡기루트를 단순화시킬 수 있는 배기가스 재순환장치를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in the exhaust gas recirculation apparatus which takes a part of the exhaust gas from the exhaust side and recycles it to the combustion chamber of the engine, an electric motor controlled by the ECU and a drive shaft of the electric motor It is composed of a suction fan which is installed and driven in the air, and sucks and sends exhaust gas, and adopts a suction device to recycle the exhaust gas regulated according to the control signal of the ECU so that the bypass pipe and EGR valve, venturi, throttle The purpose of the present invention is to provide an exhaust gas recirculation apparatus capable of eliminating the valve, thereby reducing component count and cost, and simplifying the intake route.

도 1은 본 발명에 따른 배기가스 재순환장치의 구성을 나타내는 장치구성도1 is a device configuration diagram showing the configuration of the exhaust gas recirculation apparatus according to the present invention

도 2는 본 발명에 따른 배기가스 재순환장치에서 흡입장치부를 나타내는 단 면도Figure 2 is a stage showing the suction device in the exhaust gas recirculation apparatus according to the present invention

도 3은 종래의 배기가스 재순환장치의 구성을 나타내는 장치구성도3 is a device configuration diagram showing a configuration of a conventional exhaust gas recirculation apparatus

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 흡기파이프12 : 드로틀 밸브10 intake pipe 12 throttle valve

20 : 배기측22 : EGR 쿨러20: exhaust side 22: EGR cooler

24 : EGR 밸브26 : 벤츄리(venturi)24: EGR valve 26: venturi (venturi)

28 : 바이패스 파이프30 : 흡입장치부28: bypass pipe 30: suction unit

32 : 흡입용 팬34 : 전동식 모터32: suction fan 34: electric motor

38 : 배기가스 흡입용 파이프40 : ECU38: exhaust gas suction pipe 40: ECU

이하, 첨부도면을 참조하여 본 발명을 설명하면 다음과 같다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

본 발명에 따른 배기가스 재순환장치는 EGR 쿨러(22)로부터 흡기파이프(10)로 연결되는 배기가스 흡입용 파이프(38)를 설치하고, 상기 배기가스 흡입용 파이프(38) 내측에 설치되어 배기가스를 흡입ㆍ송출하는 흡입용 팬(32)과; ECU(40)의 제어신호에 따라 상기 흡입용 팬(32)을 조절된 회전속도로 구동시키는 전동식 모터(34);로 구성된 흡입장치부(30)를 구성하여 배기가스를 재순환시키는 것을 특징으로 한다.Exhaust gas recirculation apparatus according to the present invention is provided with an exhaust gas suction pipe 38 connected from the EGR cooler 22 to the intake pipe 10, and installed inside the exhaust gas suction pipe 38 to exhaust gas. A suction fan 32 for sucking and delivering the gas; It is characterized in that the intake device 30 consisting of; an electric motor 34 for driving the suction fan 32 at a controlled rotation speed in accordance with a control signal of the ECU 40 to recycle the exhaust gas. .

특히, 상기 제어신호는 엔진의 회전수, 부하, 흡기압력, 배기압력에 따라 상기 전동식 모터(34)의 구동속도를 조절하는 것을 특징으로 한다.In particular, the control signal is characterized in that for controlling the drive speed of the electric motor 34 in accordance with the engine speed, load, intake pressure, exhaust pressure.

이하, 첨부도면을 참조하여 본 발명을 좀 더 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

첨부한 도 1은 본 발명에 따른 배기가스 재순환장치의 구성을 나타내는 장치구성도이고, 도 2는 본 발명에 따른 배기가스 재순환장치에서 흡입장치부를 나타내는 단면도이다.1 is a block diagram illustrating a configuration of an exhaust gas recirculation apparatus according to the present invention, and FIG. 2 is a cross-sectional view illustrating a suction device in the exhaust gas recirculation apparatus according to the present invention.

미설명 부호 40, 50, 60은 각각 엔진, 에어필터, 에어인터쿨러를 나타낸다.Reference numerals 40, 50, and 60 denote engines, air filters, and air intercoolers, respectively.

이에 도시한 바와 같이, 본 발명에 따른 배기가스 재순환장치는 EGR 쿨러(22)로부터 흡기파이프(10)로 연결되는 배기가스 흡입용 파이프(38)와, ECU(40)의 제어를 받는 흡입장치부(30)가 설치된다.As shown in the drawing, the exhaust gas recirculation apparatus according to the present invention includes an exhaust gas suction pipe 38 connected from the EGR cooler 22 to the intake pipe 10, and an intake apparatus part controlled by the ECU 40. 30 is installed.

상기 흡입장치부(30)는 배기가스 흡입용 파이프(38) 외측에 설치되어 ECU(40)의 제어를 받는 전동식 모터(34)와, 배기가스 흡입용 파이프(38) 내측에서 상기 전동식 모터(34)의 구동축(35)에 장착ㆍ구동되어 배기가스를 흡입ㆍ송출하는 흡입용 팬(32)으로 구성된다.The suction device 30 is installed outside the exhaust gas suction pipe 38 and is controlled by the ECU 40, and the electric motor 34 inside the exhaust gas suction pipe 38. And a suction fan 32 which is mounted on and driven by the drive shaft 35 of the &quot;

상기 전동식 모터(34)의 구동축(35)에는 시일(36)로써 배기가스의 누출이 일어나지 않도록 한다.The drive shaft 35 of the electric motor 34 prevents the leakage of exhaust gas by the seal 36.

배기가스의 재순환량을 결정하게 되는 흡입용 팬(32)의 속도는 이를 구동시키는 전동식 모터(34)의 구동속도에 따라 달라지게 된다.The speed of the suction fan 32 to determine the recycle amount of the exhaust gas depends on the driving speed of the electric motor 34 driving it.

상기 전동식 모터(34)의 구동속도는 통상 설치되는 센서에 의해 검출된 엔진의 회전수, 부하, 흡기압력, 배기압력에 대해서 ECU(40)의 ROM 데이터에 의해 설정된 전류량에 따라 제어된다.The driving speed of the electric motor 34 is controlled according to the amount of current set by the ROM data of the ECU 40 with respect to the engine speed, load, intake pressure, and exhaust pressure of the engine detected by a sensor which is normally installed.

즉, ECU(40)가 검출된 데이터에 따라 전동식 모터(34)를 구동시키는 전류량을 조절하게 되는 것이다.That is, the ECU 40 adjusts the amount of current for driving the electric motor 34 according to the detected data.

이와 같이 하여, 엔진의 저속영역에서는 흡기압력보다 배기압력이 낮으므로 흡입용 팬(32)을 고속회전시키고, 조절된 양의 배기가스를 재순환시키게 된다.In this way, since the exhaust pressure is lower than the intake pressure in the low speed region of the engine, the intake fan 32 is rotated at high speed, and the regulated amount of exhaust gas is recycled.

또한, 엔진의 고속영역에서는 흡입용 팬(32)을 적절하게 저속회전시켜 과도한 배기가스가 흡기측으로 유입되지 않도록 밸브의 역할을 함과 동시에 조절된 양의 배기가스를 재순환시키게 된다.In addition, in the high speed region of the engine, the suction fan 32 is appropriately rotated at a low speed to serve as a valve so that excessive exhaust gas does not flow into the intake side, and at the same time, recycles a regulated amount of exhaust gas.

이상에서 상술한 바와 같이, 본 발명에 따른 배기가스 재순환장치에 의하면 ECU의 제어를 받는 전동식 모터와, 전동식 모터의 구동축에 장착ㆍ구동되어 배기가스를 흡입ㆍ송출하는 흡입용 팬으로 구성되어 ECU의 제어신호에 따라 조절된 양의 배기가스가 재순환되도록 한 흡입장치부를 채용함으로써, 바이패스 파이프 및 EGR 밸브, 벤츄리, 드로틀 밸브를 삭제할 수 있어 부품수 감소 및 원가 절감을 이룰 수 있고, 흡기루트를 단순화시킬 수 있는 효과가 있다.As described above, the exhaust gas recirculation apparatus according to the present invention comprises an electric motor controlled by the ECU, and a suction fan mounted and driven on the drive shaft of the electric motor to suck and send the exhaust gas. By adopting the intake unit to recirculate the regulated amount of exhaust gas in accordance with the control signal, bypass pipe, EGR valve, venturi and throttle valve can be eliminated, which can reduce the number of parts and reduce the cost, and simplify the intake route. It can be effected.

Claims (2)

EGR 쿨러(22)로부터 흡기파이프(10)로 연결되는 배기가스 흡입용 파이프(38)를 설치하고, 상기 배기가스 흡입용 파이프(38) 내측에 설치되어 배기가스를 흡입ㆍ송출하는 흡입용 팬(32)과; ECU(40)의 제어신호에 따라 상기 흡입용 팬(32)을 조절된 회전속도로 구동시키는 전동식 모터(34);로 구성된 흡입장치부(30)를 구성하여 배기가스를 재순환시키는 것을 특징으로 하는 배기가스 재순환장치.An intake fan 38 which is connected to the intake pipe 10 from the EGR cooler 22 and is provided inside the exhaust gas intake pipe 38 to suck and exhaust the exhaust gas. 32); And an intake device 30 composed of an electric motor 34 for driving the intake fan 32 at a controlled rotational speed according to a control signal of the ECU 40. Exhaust gas recirculation system. 제 1 항에 있어서, 상기 제어신호는 엔진의 회전수, 부하, 흡기압력, 배기압력에 따라 상기 전동식 모터(34)의 구동속도를 조절하는 것을 특징으로 하는 배기가스 재순환장치.The exhaust gas recirculation apparatus according to claim 1, wherein the control signal adjusts a driving speed of the electric motor (34) according to an engine speed, a load, an intake pressure, and an exhaust pressure.
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KR100580453B1 (en) * 2002-10-04 2006-05-15 현대자동차주식회사 A control device and the method for exhaust gas recirculation testing in single cylinder engine
US7263983B2 (en) 2005-07-20 2007-09-04 Denso Corporation Exhaust gas recirculation device

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JPH051843U (en) * 1991-06-28 1993-01-14 三菱自動車工業株式会社 Exhaust gas recirculation device
JPH0530454U (en) * 1991-09-27 1993-04-23 愛知機械工業株式会社 Engine with mechanical supercharger
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* Cited by examiner, † Cited by third party
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KR100580453B1 (en) * 2002-10-04 2006-05-15 현대자동차주식회사 A control device and the method for exhaust gas recirculation testing in single cylinder engine
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