KR19980034656U - Exhaust gas recirculation valve - Google Patents
Exhaust gas recirculation valve Download PDFInfo
- Publication number
- KR19980034656U KR19980034656U KR2019960047606U KR19960047606U KR19980034656U KR 19980034656 U KR19980034656 U KR 19980034656U KR 2019960047606 U KR2019960047606 U KR 2019960047606U KR 19960047606 U KR19960047606 U KR 19960047606U KR 19980034656 U KR19980034656 U KR 19980034656U
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- KR
- South Korea
- Prior art keywords
- exhaust gas
- valve
- gas recirculation
- motor
- rotor
- Prior art date
Links
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 abstract description 10
- 230000003134 recirculating effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 28
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 17
- 238000002485 combustion reaction Methods 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F02M26/65—Constructional details of EGR valves
- F02M26/72—Housings
- F02M26/73—Housings with means for heating or cooling the EGR valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0052—Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount
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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
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
-
- 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
- F02M26/65—Constructional details of EGR valves
- F02M26/66—Lift valves, e.g. poppet valves
- F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D2041/0067—Determining the EGR temperature
Landscapes
- 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 고안은 배기가스 저감장치 중에서, NOx를 저감시키기 위해 배기가스의 일부를 재순환시키는 전자제어방식의 EGR 밸브에 관한 것으로, 구조를 단순화하고, 냉각 효과를 높여 내구성을 향상시킬 수 있도록 한다. 이를 위하여, 상기 EGR 밸브는 배기 매니폴드 및 흡기 매니폴드와 연통된 배기가스 통로(8, 9)가 모터(12)에 의해 회전되는 로터(11)에 의해 승강되는 밸브로드(10)에 승강 동작에 의해 개폐 조절되도록 구성된다. 상기 로터가 설치된 밸브 바디의 외주에는 냉각핀(13)이 설치된다. 또, 상기 모터는 ECU에 의해 제어된다.The present invention relates to an electronically controlled EGR valve for recirculating a part of the exhaust gas in order to reduce the NOx among the exhaust gas reducing apparatuses, which can simplify the structure, increase the cooling effect, and improve durability. To this end, the EGR valve is lifted by the valve rod 10 in which the exhaust gas passages 8 and 9 communicating with the exhaust manifold and the intake manifold are lifted by the rotor 11 rotated by the motor 12. It is configured to be controlled by opening and closing. Cooling fins 13 are installed on the outer circumference of the valve body in which the rotor is installed. In addition, the motor is controlled by the ECU.
Description
제 1도는 일반적인 배기가스 재순환장치를 보인 구성도.1 is a block diagram showing a general exhaust gas recirculation device.
제 2도는 본 고안에 의한 배기가스 재순환 밸브를 도시한 단면도.2 is a cross-sectional view showing an exhaust gas recirculation valve according to the present invention.
*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
4: EGR 밸브7: 밸브 바디4: EGR valve 7: valve body
8: 입구9: 출구8: entrance 9: exit
10: 밸브로드11: 로터10: valve rod 11: rotor
12: 모터13: 냉각핀12: motor 13: cooling fin
[고안의 기술분야][Technical Area of Design]
본 고안은 배가가스 재순환(Exhaust Gas Recirculation; EGR) 밸브에 관한 것으로서, 보다 구체적으로 배기가스 저감장치 중의 특히, 질소산화물(NOx)의 저감시키기 위해 배기가스의 일부를 재순환시키는 전자제어방식의 EGR 밸브에 관한 것이다.The present invention relates to an exhaust gas recirculation (ECR) valve, and more specifically an electronically controlled EGR valve for recirculating a part of the exhaust gas in order to reduce nitrogen oxides (NOx) in the exhaust gas reduction device. It is about.
[종래기술][Private Technology]
일반적으로, 자동차의 배기계는 엔진의 연소실에서 연소된 배기 가스를 외부로 배출시키기 위해, 배기 매니폴드, 배기 파이프, 촉매 컨버터 및 사일런서를 구비하여 이루어진다.In general, an exhaust system of an automobile includes an exhaust manifold, an exhaust pipe, a catalytic converter, and a silencer for exhausting exhaust gas combusted in an engine combustion chamber to the outside.
이러한 배기계에 있어서, 연소실에서 배출되는 배기 가스는 인체에 무해한 수증기(H2O), 질소(N2), 탄산가스(CO2) 등도 있으나, 일산화탄소(CO), 탄화수소(HC), 질소 산화물(NOx) 등의 유동성 물질도 포함되어 있다.In such an exhaust system, the exhaust gas discharged from the combustion chamber includes water vapor (H 2 O), nitrogen (N 2 ), carbon dioxide (CO 2 ), and the like, which are harmless to humans, but carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides ( Fluid substances such as NOx) are also included.
여기서, 유독성 물질인 NOx를 줄이기 위한 것으로, 종래에는 흡기계로 배기가스의 일부를 재순환시켜 연소시 최소 온도를 낮추어주는 배기가스 재순환 장치가 공지되어 있다.Here, to reduce NOx, which is a toxic substance, conventionally, an exhaust gas recirculation apparatus for recirculating a part of the exhaust gas through an intake machine to lower the minimum temperature during combustion is known.
이러한 자동차의 엔진의 배기가스 재순환 장치는 제 1 도에 도시된 바와 같이, 엔진(1)의 연소실로부터 배출된 배기가스 중의 일부(혼합기의 약15% 정도 까지)를 배기 매니폴드(2)에서 끌어내, 흡기의 부압에 의해 개방되는 EGR 밸브(4)를 통해 흡기 매니폴드(3)로 보내, 연료·공기의 혼합기와 혼합시켜 연소실로 유입되게 한다.The exhaust gas recirculation apparatus of the engine of such a vehicle draws part of the exhaust gas (up to about 15% of the mixer) from the combustion chamber of the engine 1 from the exhaust manifold 2, as shown in FIG. It is sent to the intake manifold 3 through the EGR valve 4 opened by the negative pressure of the intake air, and mixed with the fuel and air mixer to be introduced into the combustion chamber.
이렇게 배기가스를 재순환시키면 새 혼합기의 충진율은 낮아지는 결과가 초래된다. 또한, 상기 재공급된 배기가스에는 질소에 비해 열용량이 큰 탄산가스가 많이 함유되어, 즉 재공급된 배기가스는 더 이상 연소작용을 할 수 없기 때문에, 동력행정시의 연소온도가 낮아지게 된다. 이렇게 연소온도가 낮아지면 질소산화물의 양은 현저하게 감소되지만, 배기가스 중의 탄화수소(HC)와 일산화탄소(CO)의 양은 저감되지 않는다. 반면, 이 배기가스 재순환장치는 NOx의 저감대책에 큰 효과가 있다.This recirculation of the exhaust gases results in a lower fill rate of the new mixer. In addition, since the resupplyed exhaust gas contains a large amount of carbon dioxide gas having a larger heat capacity than nitrogen, that is, the resupplyed exhaust gas can no longer perform a combustion action, and thus the combustion temperature at the time of power administration becomes low. When the combustion temperature is lowered in this way, the amount of nitrogen oxides is significantly reduced, but the amount of hydrocarbons (HC) and carbon monoxide (CO) in the exhaust gas is not reduced. On the other hand, this exhaust gas recirculation apparatus has a great effect on the reduction of NOx.
이러한 배기가스 재순환장치로는 상술한 부압식과 전자제어식이 있으며, 부압식은 재순환율이 5∼10%로 소량인 시스템에 주로 사용되며, 그 이상을 재순환시킬 경우에는 대부분 전자제어방식이 사용된다.The exhaust gas recirculation apparatus includes the above-described negative pressure and electronically controlled type, and the negative pressure type is mainly used in a system having a small recycle rate of 5 to 10%, and in the case of recycling more than that, most electronic control methods are used.
상기 전자제어방식의 재순환장치에서는 EGR 밸브의 밸브로드 위치를 검출하는 위치센서가 부착되고, EGR 밸브의 밸브로드 위치(즉, 개방 정도)는 미리 프로그램되어 있는 특성곡선상에서 엔진의 회전속도와 흡기 다기관의 진공도 및 엔진의 온도에 따라 ECU(전자제어유닛)에 의해 제어되는 EGR 컨트롤 솔레노이드 밸브에 의해 조절된다.In the electronically controlled recirculation device, a position sensor for detecting the valve rod position of the EGR valve is attached, and the valve rod position (that is, the opening degree) of the EGR valve is set on a pre-programmed characteristic curve of the engine speed and intake manifold. It is controlled by the EGR control solenoid valve controlled by the ECU (electronic control unit) according to the vacuum degree of the engine and the engine temperature.
[고안이 이루고자 하는 기술적 과제][Technical Challenges to be Done]
상술한 종래 기술의 배기가스 재순환장치에 있어서, 부압식의 EGR 밸브는 흡기 부압을 위한 관로(5)와 EGR 쿨러(6), 및 EGR 밸브(4) 본체의 구조가 복잡하고, 쿨러의 효과가 미소하여 내구성이 약한 문제점이 있다.In the above-described exhaust gas recirculation apparatus of the prior art, the negative pressure type EGR valve has a complicated structure of the main conduit 5, the EGR cooler 6, and the EGR valve 4 main body for intake negative pressure, and the effect of the cooler is complicated. There is a problem of weak durability.
또, 종래의 전자제어식 EGR 밸브는 ECU의 시그널에 의해 EGR 밸브를 제어하는 EGR 컨트롤 솔레노이드 밸브와 같은 구조를 필요로 하며, 냉각효과가 미약한 문제점이 있다.In addition, the conventional electronically controlled EGR valve requires the same structure as the EGR control solenoid valve for controlling the EGR valve by the signal of the ECU, there is a weak cooling effect.
이러한 종래 기술의 문제점을 해소하기 위한 목적에서 안출된 것으로 본 고안은 구조의 단순화와 실질적으로 냉각 효과를 높여 내구성을 향상시킬 수 있는 EGR 밸브를 제공하고자 한다.The present invention has been made to solve the problems of the prior art to provide an EGR valve that can improve the durability by simplifying the structure and substantially increase the cooling effect.
[고안의 구성 및 작용][Configuration and Action of Design]
상기 목적을 실현하기 위한 수단으로, 본 고안은 후술하는 구성을 갖는 배기가스 재순환 밸브를 제안한다.As a means for realizing the above object, the present invention proposes an exhaust gas recirculation valve having a configuration described below.
즉, 본 고안은 엔진의 배기 매니폴드와 흡기 매니폴드를 연결하는 재순환 관로에 설치되는 EGR 밸브에 관한 것으로, 배가가스 통로가 모터와, 그 모터에 의해 회전되는 로터(rotor)에 의해 승가되는 밸브로드에 의해 개폐 조절되게 구성된 것을 특징으로 한다.That is, the present invention relates to an EGR valve installed in a recirculation pipe connecting an exhaust manifold and an intake manifold of an engine, wherein the exhaust gas passage is lifted by a motor and a rotor rotated by the motor. Characterized in that configured to be opened and closed by the rod.
상기 로터가 설치된 밸브 바디의 외주에는 공냉 효과를 높이기 위한 냉각핀이 설치된다.Cooling fins are installed on the outer circumference of the valve body in which the rotor is installed to increase the air cooling effect.
또, 상기 모터는 ECU에 의해 제어되는데, 이 ECU는 냉각수온 센서, TPS(드로틀 포지션 센서), 차속 센서 및 CAS(crank angle sensor) 에 따라 제어된다.The motor is controlled by an ECU, which is controlled by a coolant temperature sensor, a throttle position sensor (TPS), a vehicle speed sensor, and a crank angle sensor (CAS).
[실 시 예][Example]
이하, 본 고안을 실현하기 위한 바람직한 실시예를 첨부 도면에 의거하여 보다 상세하게 설명한다.Hereinafter, preferred embodiments for realizing the present invention will be described in more detail with reference to the accompanying drawings.
제 2 도는 본 실시예에 관련된 배기가스 재순환 밸브를 도시한 단면도이다.2 is a cross-sectional view showing an exhaust gas recirculation valve according to the present embodiment.
본 실시예를 설명함에 있어, 종래 기술에서 인용된 도면과 동일한 본 실시예의 구성에 대해서는 동일한 부호를 사용하고 있으며, 설명의 명료성을 위해 다시 설명하지 않는다.In describing the present embodiment, the same reference numerals are used for the configuration of the present embodiment, which is the same as the drawings cited in the prior art, and will not be described again for clarity.
도면에서의 설명 부호 (4)는 EGR 밸브 전체를 지칭한다. 이 EGR 밸브(4)는 주지된 바와 같이, 엔진에서 연소된 배기가스를 배출하는 배기 매니폴드(2)와, 흡기가 유입되는 흡기 매니폴드(3)를 서로 연결하는 재순환 관로에 설치된다.Reference numeral 4 in the drawings refers to the entire EGR valve. As is well known, the EGR valve 4 is provided in a recirculation line connecting the exhaust manifold 2 for discharging the exhaust gas combusted by the engine and the intake manifold 3 into which the intake air flows.
이러한 EGR 밸브(4)의 밸브 바디(7)에는 상기 재순환 관로와 연통되는 배기가스 통로로서 입구(8) 및 출구(9)가 형성된다. 또, 밸브 바디(7)의 내부에는 상기 배기가스 통로에 직교하는 방향으로 설치되어 입구(8) 및 출구(9)를 개폐하는 밸브로드(10)가 설치된다.In the valve body 7 of the EGR valve 4, an inlet 8 and an outlet 9 are formed as exhaust gas passages communicating with the recirculation conduit. In addition, a valve rod 10 is installed in the valve body 7 in a direction orthogonal to the exhaust gas passage to open and close the inlet 8 and the outlet 9.
밸브로드(10)의 반대쪽 끝단부 위주에는 치차가 형성되며, 그 둘레에 끼워지는 로터(11)와 나사 결합되어 있다. 로터(11)는 모터(12)에 회동 가능하게 지지된다.A gear is formed around the opposite end of the valve rod 10 and is screwed with the rotor 11 fitted around the valve rod 10. The rotor 11 is rotatably supported by the motor 12.
모터(12)는 냉각수온 센서, TPS, 차속 센서 및 CAS의 시그널에 따라, 엔진의 적합한 EGR 율을 실현하기 위한 ECU에 의해 제어된다.The motor 12 is controlled by an ECU for realizing a suitable EGR rate of the engine in accordance with the signals of the coolant temperature sensor, the TPS, the vehicle speed sensor and the CAS.
이러한 모터(12)는 상기 ECU의 시그널에 의해 제어되는 스템 모터로 구성된다.This motor 12 is composed of a stem motor controlled by the signal of the ECU.
또한, 상기 로터(11)가 설치된 밸브 바디(7)의 외주에는 냉각핀(13)이 설치되는데, 이 냉각핀(13)은 EGR 밸브의 공냉 효과를 높이기 위한 것이다.In addition, a cooling fin 13 is provided on the outer circumference of the valve body 7 in which the rotor 11 is installed, and the cooling fin 13 is for increasing the air cooling effect of the EGR valve.
상술한 본 실시예의 구성에 따라, 상기 EGR 밸브(4)는 냉각수온 센서, TPS, 차속 센서 및 CAS의 시그널에 따라, ECU에 의해 제어되어 적합한 EGR 율을 실현하기 위해 구동된다.According to the configuration of this embodiment described above, the EGR valve 4 is controlled by the ECU in accordance with the signals of the cooling water temperature sensor, the TPS, the vehicle speed sensor, and the CAS, and is driven to realize a suitable EGR rate.
즉, 모터(12)의 회전에 의해 로터(11)가 자전되고, 이 로터(11)에 나사 결합된 밸브로드(7)가 상·하 방향으로 이동되면서, 배가가스 통로를 개폐하면서 적절한 EGR 율로 흡기 매니폴드로 배기가스를 공급하게 된다.That is, the rotor 11 is rotated by the rotation of the motor 12, the valve rod 7 screwed to the rotor 11 is moved in the up and down direction, while opening and closing the exhaust gas passage at an appropriate EGR rate. The exhaust gas is supplied to the intake manifold.
[고안의 효과][Effect of design]
이상에서 설명된 실시예를 통하여, 본 고안에 의한 배가가스 재순환 밸브는 종래 기술의 문제점을 실질적으로 해소하게 됨을 알 수 있다.Through the embodiments described above, it can be seen that the exhaust gas recirculation valve according to the present invention substantially solves the problems of the prior art.
즉, 본 고안은 종래의 부압식, 전자제어식 EGR 밸브와 달리, 구조가 단순화되고 실질적으로 냉각 효과를 높이는 효과를 갖게 된다. 또, EGR 밸브의 내구성도 향상시키게 된다.That is, the present invention, unlike the conventional negative pressure, electronically controlled EGR valve, the structure is simplified and has the effect of substantially increasing the cooling effect. In addition, the durability of the EGR valve is also improved.
한편, 본 고안은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 실용신안등록 청구의 범위에서 청구하는 본 고안의 요지를 벗어남이 없이 당해 고안이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능할 것이다.On the other hand, the present invention is not limited to the above-described specific preferred embodiment, any person having ordinary knowledge in the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Modifications may be made.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960047606U KR19980034656U (en) | 1996-12-11 | 1996-12-11 | Exhaust gas recirculation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960047606U KR19980034656U (en) | 1996-12-11 | 1996-12-11 | Exhaust gas recirculation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19980034656U true KR19980034656U (en) | 1998-09-15 |
Family
ID=53988711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019960047606U KR19980034656U (en) | 1996-12-11 | 1996-12-11 | Exhaust gas recirculation valve |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR19980034656U (en) |
-
1996
- 1996-12-11 KR KR2019960047606U patent/KR19980034656U/en not_active Application Discontinuation
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