KR20030060257A - Egr valve - Google Patents

Egr valve Download PDF

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Publication number
KR20030060257A
KR20030060257A KR1020020000868A KR20020000868A KR20030060257A KR 20030060257 A KR20030060257 A KR 20030060257A KR 1020020000868 A KR1020020000868 A KR 1020020000868A KR 20020000868 A KR20020000868 A KR 20020000868A KR 20030060257 A KR20030060257 A KR 20030060257A
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KR
South Korea
Prior art keywords
valve
egr
lever
exhaust gas
negative pressure
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KR1020020000868A
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Korean (ko)
Inventor
진정식
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현대자동차주식회사
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Priority to KR1020020000868A priority Critical patent/KR20030060257A/en
Publication of KR20030060257A publication Critical patent/KR20030060257A/en

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Classifications

    • 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
    • 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
    • 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 EGR valve is provided to prevent noises during the operation of the EGR valve and leakage of exhaust gas being returned to the engine, while allowing for EGR at a low duty rate. CONSTITUTION: An EGR valve comprises a valve body(2) having a valve seat(8); a valve(4) for opening/shutting the valve seat; an EGR passage(7) formed on the valve body in such a manner that the exhaust gas flows in the direction where the valve tightly contacts the valve seat; a lever(9) having an end fixed at the valve and the other end extended in the rearward direction; a support rod(10) for supporting the lever in such a manner that the lever is rotatable; a valve operating shaft(12) having a lower end connected to the other end of the lever and an upper end protruded from the valve body in such a manner that the upper end is movable in a vertical direction while maintaining an airtightness through the valve body; and an actuator(3) for moving the valve operating shaft in a vertical direction by the vacuum pressure generated by a vacuum pump.

Description

이지알 밸브{EGR Valve}EZ Valve

본 발명은 밸브작동소음을 개선하고 리턴되는 배기가스의 누설을 방지할 수 있는 EGR 밸브의 구조개선에 관한 것이다.The present invention relates to an improvement in the structure of an EGR valve that can improve valve operation noise and prevent leakage of returned exhaust gas.

일반적으로 엔진출력이 높아지게 되면 연소온도가 상승하게 되며, 연소온도가 상승하게 되면 미연탄화수소나 일산화탄소의 배출량은 줄어들게 되는 반면 대기오염에 치명적인 질소산화물(NOx)은 연소온도의 상승과 비례하여 그 발생량이 많아지게 된다.In general, when the engine power increases, the combustion temperature increases, and when the combustion temperature increases, the emissions of unburned hydrocarbons and carbon monoxide decrease, whereas the amount of nitrogen oxides (NOx), which is fatal to air pollution, is proportional to the increase of the combustion temperature. It will increase.

이 때문에 연소온도를 낮추어 질소산화물의 배출량을 저감하기 위해 배출되는 배기가스의 일부를 연소실에 공급하여 연소온도를 낮추므로써 질소산화물의 배출량을 저감하게 되는 EGR 시스템(배기가스리턴 공급시스템)이 사용되고 있다.For this reason, an EGR system (exhaust gas return supply system) that reduces the emission of nitrogen oxides by supplying a part of the exhaust gas discharged to the combustion chamber to lower the combustion temperature to lower the combustion temperature by reducing the emission of nitrogen oxides has been used. .

엔진에 도입되는 EGR량은 엔진의 운전조건에 따라 달라지게 되는데, EGR 공급량을 콘트롤하기 위해서 EGR 시스템의 도중에 도 3에 도시하는 것과같이 EGR 밸브(20)를 설치하고 있다.The amount of EGR introduced into the engine varies depending on the operating conditions of the engine. An EGR valve 20 is provided in the middle of the EGR system as shown in FIG. 3 to control the amount of EGR supplied.

도시한 EGR 밸브(20)는 진공작동 방식으로서 엔진의 흡기부압 또는 진공펌프에 의한 부압에 의해 작동하는 다이어프램(21)을 구비하고 있어, 이 다이어프램(21)이 진공펌프에 의한 부압과 리턴스프링(22)에 의해 상하로 작동하게 될 때 이에 연동하여 밸브작동축(23)끝의 밸브(24)가 밸브시트(25)로부터 이격되거나 또는 닫히도록 되어 있으며, 밸브(24)의 개방정도에 비례하여 배기가스의 리턴량이 결정되어지게 되는 것이다.The illustrated EGR valve 20 has a diaphragm 21 which is operated by the intake negative pressure of the engine or by the negative pressure of the vacuum pump as a vacuum operation method, and the diaphragm 21 is connected to the negative pressure and the return spring by the vacuum pump ( The valve 24 at the end of the valve operating shaft 23 is spaced apart or closed from the valve seat 25 when the valve 24 is operated up and down by 22), and is proportional to the opening degree of the valve 24. The return amount of the exhaust gas is determined.

그런데 도시한 구조의 EGR 밸브(20)는 EGR 통로(26)가 밸브바디(27)에 ㄱ자 형상을 이루도록 형성되어 있고, 배기가스 유입구(28)가 밸브(24)의 하측으로 형성되어 있어 EGR 온 작동시에는 적은 전기구동력만으로 EGR 통로(26)를 개방하고, 밸브(24)의 닫힘시에는 리턴스프링(22)력에 의해 EGR 통로(26)를 차단하게 되어 있는데, 상기한 종래기술의 경우 밸브(24)가 배출가스의 흐름과 반대방향으로 이동하여 EGR 통로(26)를 차단하게 되기 때문에, 밸브(24)의 개방시에는 배기가스의 유동압력을 받아 적은 힘으로 개방이 가능하지만 밸브(24)의 닫힘시나 낮은 EGR 듀티(duty) 제어시에는 밸브(24)를 밀어올리는 배기가스의 유동에너지에 의해 밸브(24)가 단번에 닫히지 못하고, 즉, 리턴스프링(22)력과 배기가스 유동력이 서로 반대방향으로 작용하는데 기인하여 밸브(24)가 밸브시트(25)에 접촉시 반발력에 의한 떨림이 일어나 소음을 발생시키는 문제점이 있다.By the way, the EGR valve 20 of the illustrated structure is formed such that the EGR passage 26 has an L-shape in the valve body 27, and the exhaust gas inlet 28 is formed under the valve 24, thereby turning on the EGR valve. In operation, the EGR passage 26 is opened with only a small electric driving force, and when the valve 24 is closed, the EGR passage 26 is blocked by the return spring 22 force. Since the valve 24 moves in the opposite direction to the flow of the exhaust gas to block the EGR passage 26, the valve 24 can be opened with a small force due to the flow pressure of the exhaust gas when the valve 24 is opened. ) Or the low EGR duty control, the valve 24 is not closed at once due to the flow energy of the exhaust gas that pushes the valve 24, i.e., the return spring 22 force and the exhaust gas flow force The valve 24 actuates when A blur due to the repulsive force of contact (25), there is a problem up to generate a noise.

이 때문에 EGR 시스템을 적용하는 차량의 경우 EGR 밸브의 소음발생 문제가 소비자 불만사항으로 지적되어오고 있으며, 특히 밸브(24)가 닫힌 상태에서 갑자기 연소실이나 배기매니폴드에 이상부압이 발생하면 원하지 않는 시점에서 EGR 통로(26)가 개방되어 매연의 과다 발생이나 배출가스의 누설을 일으키는 문제점도 지적되고 있다.For this reason, the noise generation of the EGR valve has been pointed out as a consumer complaint in the case of a vehicle employing the EGR system. In particular, when an abnormal negative pressure occurs suddenly in the combustion chamber or the exhaust manifold while the valve 24 is closed, it is not desired. In addition, the EGR passage 26 is opened, causing problems such as excessive generation of smoke and leakage of exhaust gas.

이 때문에 EGR 밸브(20)의 구조 변경 없이 배출가스의 유동방향만을 도 3에 도시한 실선화살표 방향과는 반대인 점선화살표 방향을 향하도록 밸브바디(27)를 EGR 시스템의 라인상에 접속하는 방안도 제시된 바 있으나, 이 방식이 실용화되지 못한 이유는 EGR 통로(26)가 개방되기 위해서는 진공부압에 의해 다이어프램(21)이 변위되면서 밸브(24)를 상승시킬때, 진공부압이 리턴스프링(22)의 탄성력과 배기가스 유동에너지의 합보다 커야만 밸브(24)의 개방이 가능하기 때문에 진공펌프의 용량을 크게 키워야 하므로써 현실성이 없었기 때문이다.Therefore, the valve body 27 is connected on the line of the EGR system so that only the flow direction of the exhaust gas is directed to the dotted arrow direction opposite to the solid arrow direction shown in FIG. 3 without changing the structure of the EGR valve 20. Although it has been shown, the reason why this method has not been put to practical use is that when the diaphragm 21 is displaced by the vacuum negative pressure in order to open the EGR passage 26, the vacuum negative pressure returns the return spring 22. This is because the valve 24 can be opened only when the elastic force and the exhaust gas flow energy are greater than the sum of the elastic force and the exhaust gas flow energy.

이에 본 발명은 상기한 점을 감안하여 제안한 것으로서 그의 목적으로 하는 것은Accordingly, the present invention has been made in view of the above-mentioned points, and its object is

EGR 밸브의 작동시 밸브소음 발생 문제를 해소할 수 있으며, 엔진으로 리턴공급되는 배기가스의 누설을 방지하며, 작동의 안정성이 확보되어 매연과다 배출문제를 해결하고 낮은 응답비(duty rate)의 EGR이 가능하여 엔진의 전 운전영역에서 EGR의 적용이 가능한 EGR 밸브장치를 제공하는 데 있다.When the EGR valve is operated, it can solve the problem of valve noise, prevent leakage of exhaust gas returned to the engine, and ensure the stability of operation to solve the problem of excessive emission and low response rate EGR This is to provide an EGR valve device that can be applied to the EGR in the entire operating area of the engine.

상기한 목적을 달성하기 위하여 본 발명은The present invention to achieve the above object

EGR 시스템의 도중에 마련되는 EGR 밸브에 있어서,In the EGR valve provided in the middle of the EGR system,

밸브시트를 가진 밸브바디와;A valve body having a valve seat;

상기 밸브시트를 개폐하는 밸브와;A valve for opening and closing the valve seat;

상기 밸브가 밸브시트에 밀착하는 방향을 향해 배기가스의 흐름이 일어나도록 상기 밸브바디에 형성되는 EGR 통로와;An EGR passage formed in the valve body such that exhaust gas flows toward the valve in close contact with the valve seat;

상기 밸브에 일단이 고정되고, 그의 자유단은 후방으로 연장된 지렛대와;One end is fixed to the valve, and a free end thereof is a lever extended backward;

상기 지렛대가 시이소오 회동가능하게 지지하는 지지막대와;A support rod on which the lever is pivotally supported;

상기 지렛대의 자유단에 하단이 힌지로 회동가능하게 접속되고, 상단은 밸브바디를 통해 기밀을 유지하면서 상하 축방향으로 이동이 가능하도록 밸브바디 상부로 돌출하여 연장된 밸브작동축과;A valve actuating shaft which is connected to a free end of the lever by a hinge so that the lower end thereof is rotatably connected to the upper end of the lever and protrudes upward in the vertical direction to maintain the airtight through the valve body;

엔진의 흡기부압 또는 진공펌프에 의한 부압에 의해 상기 밸브작동축을 상하로 이동시키는 액츄에이터; 를 포함하여 구성되어 있다.An actuator for moving the valve operation shaft up and down by an intake negative pressure of the engine or a negative pressure by a vacuum pump; It is configured to include.

도 1은 본 발명에 의한 EGR 밸브의 닫힘상태를 나타낸 도면.1 is a view showing a closed state of the EGR valve according to the present invention.

도 2는 본 발명에 의한 EGR 밸브의 열림상태를 나타낸 도면.2 is a view showing an open state of the EGR valve according to the present invention.

도 3은 종래기술.3 is a prior art.

※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing

1 : EGR 밸브 2 : 밸브바디1: EGR valve 2: valve body

3 : 액츄에이터 4 : 밸브3: Actuator 4: Valve

5 : 배기가스 유입구 6 : 배기가스 유출구5: exhaust gas inlet 6: exhaust gas outlet

7 : EGR통로 8 : 밸브시트7: EGR passage 8: valve seat

9 : 지렛대 10 : 지지막대9: lever 10: support rod

11 : 힌지 12 : 밸브작동축11 hinge 12 valve operating shaft

13 : 시일부재 14 : 하우징13 seal member 14 housing

15 : 다이어프램 16 : 부압 작동실15 diaphragm 16: negative pressure operating chamber

17 : 리턴스프링 18 : 입구관로17: return spring 18: entrance pipe

이하 본 발명의 구성을 첨부한 도면을 참조하여 설명한다.Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명에 의한 EGR 밸브의 닫힘상태를 나타내는 도면이고, 도 2는 본 발명에 의한 EGR 밸브의 개방상태를 나타내는 도면이다.1 is a view showing a closed state of the EGR valve according to the present invention, Figure 2 is a view showing an open state of the EGR valve according to the present invention.

EGR 밸브(1)는 밸브바디(2)와 액츄에이터(3) 및 밸브(4)를 포함하여 구성되어 있다.The EGR valve 1 is comprised including the valve body 2, the actuator 3, and the valve 4. As shown in FIG.

밸브바디(2)내에는 배기가스 유입구(5)와 배기가스 유출구(6)가 대략 직각을 형성하게 되는 EGR 통로(7)가 형성되어 있으며, 밸브시트(8)를 개폐하는 밸브(4)가 지렛대(9)의 선단에 장착되어 있다.In the valve body 2, an EGR passage 7 is formed in which the exhaust gas inlet 5 and the exhaust gas outlet 6 are formed at a right angle, and a valve 4 for opening and closing the valve seat 8 is provided. It is attached to the tip of the lever 9.

지렛대(9)는 수평으로 연장되어 설치되며, 지지막대(10)에 의해 시이소오 회동이 가능하게 밸브바디(2)에 지지되어 있다.The lever 9 is installed to extend horizontally, and is supported by the valve body 2 by the support rod 10 so as to allow the seesaw rotation.

지지막대(10)는 지렛대(9)를 분할하되, 밸브(4)측에 더 가깝게 위치하는 것이 밸브(4)의 작동력을 저감하는 측면에서 바람직하며, 이 지지막대(10)의 자유단에는 힌지(11, 볼조인트로 구성)에 의해 회동가능한 구조로 밸브작동축(12)이 접속되고, 이 밸브작동축(12)은 지렛대(9)에 대해 수직으로 연결되어 밸브바디(2)를 상부로 관통하여 연장되어 있다.The support rod 10 divides the lever 9, but is located closer to the valve 4 side in terms of reducing the operating force of the valve 4, and the free end of the support rod 10 is hinged. The valve actuating shaft 12 is connected in a rotatable structure by means of a ball joint 11, and the valve actuating shaft 12 is vertically connected to the lever 9 to bring the valve body 2 upward. Extends through;

상기 밸브작동축(12)은 안내부재의 역할을 겸하는 시일부재(13)를 통해 밸브바디(2) 상부로 돌출하여 상하방향, 즉 수직방향으로의 이동이 허용되며, 밸브작동축(12)은 액츄에이터(3)의 하우징(14) 내부를 구획하는 다이어프램(15)에 그의 상단이 고정되어 있다.The valve actuating shaft 12 protrudes upward through the valve body 2 through the seal member 13 serving as a guide member, and is allowed to move upward and downward, that is, in a vertical direction, and the valve actuating shaft 12 is The upper end is fixed to the diaphragm 15 which partitions the inside of the housing 14 of the actuator 3.

액츄에이터(3)는 부압작동실(16)을 구비하고 있으며, 부압작동실(16)내에는 다이어프램을 탄발하는 리턴스프링(17)이 설치되어 있다.The actuator 3 is provided with the negative pressure operation chamber 16, and the return spring 17 which releases a diaphragm is provided in the negative pressure operation chamber 16. As shown in FIG.

그리고 액츄에이터(3)는 입구관로(18)를 통해 진공펌프(도시생략)나 또는 흡기매니폴드측에 접속되어 부압작동실(16)에는 흡기부압이 작용하게 된다.The actuator 3 is connected to the vacuum pump (not shown) or the intake manifold side through the inlet pipe 18 so that the intake negative pressure acts on the negative pressure operation chamber 16.

이하에 본 발명의 작동에 대하여 설명한다.The operation of the present invention will be described below.

EGR 밸브(1)의 작동 온시에는 액츄에이터(3)의 부압작동실(16)에 작용하는 흡기부압에 의해 다이어프램(15)이 리턴스프링(17)을 압축하면서 상승(부압작동실의 용적을 축소하는 방향으로 이동)하게 되며, 이에 연동하여 밸브작동축(12)이 상승하게 되면, 힌지(11)를 통해 접속된 지렛대(9)가 지지막대(10)를 중심점으로 시이소오 회동, 즉, 도시한 상태를 기준하여서는 반시계 방향으로 회동하여 밸브(4)가 밸브시트(8)로부터 떨어져 EGR 통로(7)가 개방되게 된다.(도 2 참조)When the EGR valve 1 is turned on, the diaphragm 15 compresses the return spring 17 by the intake negative pressure acting on the negative pressure operating chamber 16 of the actuator 3 (which reduces the volume of the negative pressure operating chamber). Direction), and in conjunction with this, when the valve operation shaft 12 is raised, the lever 9 connected through the hinge 11 is pivoted around the support rod 10, that is, as shown in FIG. On the basis of the state, the valve 4 is rotated counterclockwise so that the EGR passage 7 is opened from the valve seat 8 (see Fig. 2).

이때 밸브(4)는 배기가스의 흐름방향에 저항하는 방향으로 회동하여 개방되게 되나, 지렛대(9)의 힘의 배분점이 밸브(4)측 가까이로 설정되어 있어 밸브작동축(12)을 통해 지렛대(9)의 힌지접속지점(10)인 자유단에 가해지는 회전모우먼트가 커서 작은 힘으로도 밸브(4)의 개폐가 가능한 것이다.At this time, the valve 4 is rotated to open in a direction that resists the flow direction of the exhaust gas, but the distribution point of the force of the lever 9 is set near the valve 4 side, and the lever actuates through the valve operating shaft 12. The rotation moment applied to the free end of the hinge connection point 10 of (9) is large, and the valve 4 can be opened and closed with a small force.

한편, 밸브(4)가 닫힐 때에는 부압작용실(16)에 걸리는 부압이 작아지게 되고, 이에따라 리턴스프링(17)의 탄발력에 의해 다이어프램(15) 및 밸브작동축(12)이 하강하게 되며, 지렛대(9)가 시계방향으로 시이소오 회동하여 밸브(4)가 밸브시트(8) 측에 당접하게 되는데, 밸브(4)의 닫힘방향과 배기가스의 유동방향이 같은방향이어서 저항이 작용하지 않기 때문에 밸브착좌시의 떨림현상이 발생하지 않으며, 또 배기가스압에 의해 닫힘력이 제고되었기 때문에 임의적으로 밸브(4)가 잘 열리지 않게되어 배기가스의 누설이 방지되는 것이다.On the other hand, when the valve 4 is closed, the negative pressure applied to the negative pressure action chamber 16 becomes small, and accordingly the diaphragm 15 and the valve operating shaft 12 are lowered by the elastic force of the return spring 17, The lever 9 rotates in a clockwise direction so that the valve 4 abuts the valve seat 8 side. The closing direction of the valve 4 and the flow direction of the exhaust gas are the same direction, so that resistance does not act. Therefore, the shaking phenomenon at the time of valve seating does not occur, and since the closing force is improved by the exhaust gas pressure, the valve 4 does not open arbitrarily, and leakage of the exhaust gas is prevented.

또 밸브(4)의 떨림현상 제거 및 작동력 향상에 따라 밸브(4)의 미세열림조정이 가능하여 낮은 듀티비(duty rate)의 EGR이 가능하다.In addition, the fine opening of the valve 4 can be adjusted by removing the shaking phenomenon of the valve 4 and improving the operating force, thereby enabling a low duty ratio EGR.

이상과 같은 본 발명에 의하면 지렛대의 원리를 이용하여 EGR 밸브를 개방작동하기 때문에 적은힘으로도 안정적으로 밸브의 개폐가 가능할 뿐 아니라, 특히 밸브가 닫힘방향으로 배기가스의 유동압력을 받도록 배기가스의 흐름방향이 설정되어 있기 때문에 밸브닫힘시의 배기가스압에 의한 반발력이 사라져 밸브의 떨림현상에 의한 소음발생이 제거되는 효과가 있으며, 배기가스압의 작용에 의해 밸브가 안정적으로 닫힘상태가 유지될 수 있어 배기가스의 누설이 방지되어, 밸브닫힘 불량에 의한 매연 과다배출 문제를 해결할 수 있고, 낮은 듀티비의 EGR이 가능하여 엔진의 전 운전영역에 걸쳐 EGR을 적용하는 것이 가능한 효과가 있다.According to the present invention as described above, since the EGR valve is opened using the principle of the lever, it is possible to open and close the valve stably with a small force, and in particular, the exhaust gas is subjected to the flow pressure of the exhaust gas in the closing direction. Since the flow direction is set, the repulsive force caused by the exhaust gas pressure at the time of closing the valve is eliminated, and the noise generated by the shaking of the valve is eliminated, and the valve can be stably closed by the action of the exhaust gas pressure. The leakage of exhaust gas is prevented, so that the problem of excessive exhaust emission due to the valve closing failure can be solved, and the low duty ratio EGR is possible, so that the EGR can be applied over the entire operating region of the engine.

Claims (5)

EGR시스템의 도중에 마련되어 배기가스의 리턴 공급량을 제어하는 EGR밸브에 있어서,In the EGR valve provided in the middle of the EGR system to control the return supply amount of the exhaust gas, 밸브시트를 가진 밸브바디와;A valve body having a valve seat; 상기 밸브시트를 개폐하는 밸브와;A valve for opening and closing the valve seat; 상기 밸브가 밸브시트에 밀착하는 방향을 향해 배기가스의 흐름이 일어나도록 상기 밸브바디에 형성되는 EGR 통로와;An EGR passage formed in the valve body such that exhaust gas flows toward the valve in close contact with the valve seat; 상기 밸브에 일단이 고정되고, 그의 자유단은 후방으로 연장된 지렛대와;One end is fixed to the valve, and a free end thereof is a lever extended backward; 상기 지렛대가 시이소오 회동가능하게 지지하는 지지막대와;A support rod on which the lever is pivotally supported; 상기 지렛대의 자유단에 하단이 힌지로 회동가능하게 접속되고, 상단은 밸브바디를 통해 기밀을 유지하면서 상하 축방향으로 이동이 가능하도록 밸브바디 상부로 돌출하여 연장된 밸브작동축과;A valve actuating shaft which is connected to a free end of the lever by a hinge so that the lower end thereof is rotatably connected to the upper end of the lever and protrudes upward in the vertical direction to maintain the airtight through the valve body; 엔진의 흡기부압 또는 진공펌프에 의한 부압에 의해 상기 밸브작동축을 상하로 이동시키는 액츄에이터; 를 포함하여 구성되어 있는 것을 특징으로 하는 EGR 밸브.An actuator for moving the valve operation shaft up and down by an intake negative pressure of the engine or a negative pressure by a vacuum pump; EGR valve, characterized in that comprises a. 제 1 항에 있어서,The method of claim 1, 상기 지렛대를 분할하여 지지하는 지지막대의 지지점은 밸브측에 가깝게 설정된 것을 특징으로 하는 EGR 밸브.EGR valve, characterized in that the support point of the support rod for dividing and supporting the lever is set close to the valve side. 제 2 항에 있어서,The method of claim 2, 상기 지렛대와 밸브작동축을 접속하는 힌지는 볼 조인트인 것을 특징으로 하는 EGR 밸브.The hinge connecting the lever and the valve operating shaft is an EGR valve. 제 1 항에 있어서,The method of claim 1, 상기 밸브작동축의 상하 이동을 안내하고 밸브바디내를 밀봉하기 위해 시일부재를 구비하고 있는 것을 특징으로 하는 EGR 밸브.EGR valve, characterized in that it is provided with a seal member for guiding the vertical movement of the valve operation shaft and sealing in the valve body. 제 4 항에 있어서,The method of claim 4, wherein 상기 액츄에이터는 다이어프램과 흡기매니폴드측에 연통되게 접속되는 부압작용실과, 밸브닫힘방향으로 다이어프램을 탄발하는 리턴스프링 및 상기 다이어프렘에 상단이 고정되고 하단이 상기 지렛대에 힌지 접속된 밸브작동축을 구비하는 것을 특징으로 하는 EGR 밸브.The actuator has a negative pressure action chamber connected in communication with the diaphragm and the intake manifold side, a return spring for ejecting the diaphragm in the valve closing direction, and a valve operating shaft having an upper end fixed to the diaphragm and a lower end hinged to the lever. EGR valve, characterized in that.
KR1020020000868A 2002-01-08 2002-01-08 Egr valve KR20030060257A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100725733B1 (en) * 2006-05-30 2007-06-08 (주)에이오앤 Valve for preventing reverse-flow
KR101387627B1 (en) * 2006-07-06 2014-04-22 쿠퍼-스탠다드 오토모티브(도이칠랜드) 게엠베하 Exhaust-Gas Recirculation Valve
CN112610342A (en) * 2020-12-15 2021-04-06 广西玉柴机器股份有限公司 EGR valve control method for improving engine stop noise

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JPH08232774A (en) * 1995-02-27 1996-09-10 Aisin Seiki Co Ltd Exhaust gas reflux amount control valve
KR970034159A (en) * 1995-12-23 1997-07-22 전성원 Eccentric Friction Damped Shock Absorber
JPH11315758A (en) * 1998-04-30 1999-11-16 Hino Motors Ltd Exhaust recirculation unit

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Publication number Priority date Publication date Assignee Title
US4438250A (en) * 1979-01-23 1984-03-20 Bayer Aktiengesellschaft Suspensions of isocyanato ureas in isocyanate prepolymers, a process for their production and their use in the production of high molecular-weight polyurethane plastics
JPH08232774A (en) * 1995-02-27 1996-09-10 Aisin Seiki Co Ltd Exhaust gas reflux amount control valve
KR970034159A (en) * 1995-12-23 1997-07-22 전성원 Eccentric Friction Damped Shock Absorber
JPH11315758A (en) * 1998-04-30 1999-11-16 Hino Motors Ltd Exhaust recirculation unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100725733B1 (en) * 2006-05-30 2007-06-08 (주)에이오앤 Valve for preventing reverse-flow
KR101387627B1 (en) * 2006-07-06 2014-04-22 쿠퍼-스탠다드 오토모티브(도이칠랜드) 게엠베하 Exhaust-Gas Recirculation Valve
CN112610342A (en) * 2020-12-15 2021-04-06 广西玉柴机器股份有限公司 EGR valve control method for improving engine stop noise
CN112610342B (en) * 2020-12-15 2022-07-15 广西玉柴机器股份有限公司 EGR valve control method for improving engine stop noise

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