KR100384139B1 - EGR valve for diesel engine - Google Patents

EGR valve for diesel engine Download PDF

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Publication number
KR100384139B1
KR100384139B1 KR10-2000-0070830A KR20000070830A KR100384139B1 KR 100384139 B1 KR100384139 B1 KR 100384139B1 KR 20000070830 A KR20000070830 A KR 20000070830A KR 100384139 B1 KR100384139 B1 KR 100384139B1
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South Korea
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exhaust gas
valve
inlet
outlet
exhaust
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KR10-2000-0070830A
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Korean (ko)
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KR20020041082A (en
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나정현
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현대자동차주식회사
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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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust 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
    • F02M2026/004—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 디젤엔진의 배기재순환통로의 도중에 형성되어 배기매니폴드에서 유입된 배기가스를 수용한 다음, 엔진스피드센서와 가속페달센서 및 공기센서에서 측정된 측정값에 따라 전자제어장치가 솔레노이드를 작동시키므로서 엔진상황에 알맞도록 배기가스를 압축하여 유출구를 통해 흡기매니폴드에 보내도록 하는 디젤엔진의 배기가스재순환밸브에 관한 것으로,The present invention is formed in the middle of the exhaust recirculation passage of the diesel engine to receive the exhaust gas flowing from the exhaust manifold, and then the electronic controller operates the solenoid according to the measured values measured in the engine speed sensor, the accelerator pedal sensor and the air sensor The present invention relates to an exhaust gas recirculation valve of a diesel engine that compresses the exhaust gas according to an engine situation and sends the exhaust gas to an intake manifold through an outlet.

배기재순환가스의 양 및 작동압을 조절하기 위해 배기재순환라인의 도중에 형성되는 것에 있어서,In the middle of the exhaust recirculation line to control the amount and operating pressure of the exhaust recirculation gas,

배기매니폴드로부터 배기가스가 유입되는 유입구가 일측에 형성되며, 유입구와 직각방향이 되도록 배기가스 유출구가 형성되며, 유출구의 직하방으로 솔레노이드밸브가 형성되기 위한 원통형의 연결구가 형성되며, 유입구와 유출구가 연결되는 부분에 배기가스가 수용되는 챔버가 형성되는 하우징과;An inlet port through which exhaust gas flows from the exhaust manifold is formed on one side, and an exhaust gas outlet port is formed to be perpendicular to the inlet port, and a cylindrical connection port is formed to form a solenoid valve directly under the outlet port. A housing in which a chamber for receiving exhaust gas is formed at a portion to which the gas is connected;

상기한 유입구로 유입된 배기가스의 압력이 일정압 이상이 되면 작동되도록 제1밸브체와 제1스프링으로 구성되어 유입구 내부측에 형성된 유입통로를 개폐하는 제1밸브와;A first valve configured to open and close an inlet passage formed in the inlet, the first valve body and the first spring to operate when the pressure of the exhaust gas introduced into the inlet is equal to or higher than a predetermined pressure;

상기한 하우징 내의 챔버에 충진된 배기가스의 압력이 일정압 이상이 되면 작동되도록 제2밸브체와 제2스프링으로 구성되어 유출구 내부측에 형성된 유출통로를 개폐하는 제2밸브와;A second valve configured to open and close an outlet passage formed inside the outlet port by a second valve body and a second spring to operate when the pressure of the exhaust gas filled in the chamber in the housing is equal to or higher than a predetermined pressure;

상기한 유입구에서 유입된 배기가스를 일정량 흡입하여 압축된 상태로 유출구로 배출되도록 하기 위해 제2밸브의 제2밸브체 외주에 제3스프링에 의해 지지되도록 형성되어 상기 연결구를 따라 상하이동하는 피스톤과;A piston which is formed to be supported by a third spring on the outer circumference of the second valve body of the second valve so as to suck a predetermined amount of the exhaust gas introduced from the inlet to be discharged to the outlet in a compressed state; ;

상기한 제3스프링에 의해 탄력지지되는 피스톤을 간헐적으로 상측으로 이동시키기 위해 상기 하우징의 연결구의 하측에 형성되는 솔레노이드밸브; 로 구성되는 것을 특징으로 하고,A solenoid valve formed at a lower side of the connector of the housing to move the piston elastically supported by the third spring intermittently upward; Characterized in that,

상기한 솔레노이드밸브는 엔진스피드센서와 가속페달센서와 에어센서에서 측정된 값에 의해 전자제어장치의 제어에 따라 작동되는 것을 특징으로 하며,The solenoid valve is operated according to the control of the electronic control device by the value measured from the engine speed sensor, the accelerator pedal sensor and the air sensor,

상기한 피스톤은 상기 솔레노이드밸브의 작동에 따라서 에어탱크에서 공급되는 공기압에 의해 상향작동되는 것을 특징으로 한다.The piston may be operated upward by the air pressure supplied from the air tank according to the operation of the solenoid valve.

Description

디젤엔진의 배기가스재순환밸브{EGR valve for diesel engine}Exhaust gas recirculation valve of diesel engine {EGR valve for diesel engine}

본 발명은 디젤엔진의 배기가스재순환밸브에 관한 것으로서, 보다 상세하게는 디젤엔진의 배기재순환통로의 도중에 형성되어 배기매니폴드에서 유입된 배기가스를 수용한 다음, 엔진스피드센서와 가속페달센서 및 공기센서에서 측정된 측정값에 따라 전자제어장치가 솔레노이드를 작동시키므로서 엔진상황에 알맞도록 배기가스를 압축하여 유출구를 통해 흡기매니폴드에 보내도록 하는 디젤엔진의 배기가스재순환밸브에 관한 것이다.The present invention relates to an exhaust gas recirculation valve of a diesel engine, and more particularly, is formed in the middle of an exhaust recirculation passage of a diesel engine to receive the exhaust gas introduced from the exhaust manifold, and then the engine speed sensor, the accelerator pedal sensor, and the air. The present invention relates to an exhaust gas recirculation valve of a diesel engine, in which an electronic control unit operates a solenoid according to a measured value of a sensor, thereby compressing the exhaust gas to be suitable for an engine situation and sending the exhaust gas to an intake manifold through an outlet.

일반적으로 디젤엔진은 그 연료가 경유로서 휘발성에 약하여 연소실에 점화되기 위해서는 직접분사방식을 채택하고 있다.In general, diesel engines use direct injection in order to ignite the combustion chamber because their fuel is weak in volatility.

그런데 최초시동시 엔진은 냉각되어 있는 상태이므로 설정된 온도로 상승될 때까지는 연소되지 않은 배기가스가 그대로 대기로 방출되므로 탄화수소, 녹스 (NOx) 등의 유해물질이 배출되어 대기를 오염시키는 문제점이 있었다.However, since the engine is cooled during the initial start-up, until the temperature rises, uncombusted exhaust gas is discharged to the atmosphere as it is, there is a problem of polluting the air by releasing harmful substances such as hydrocarbons and NOx.

따라서 이러한 문제점을 해소하고자 도 5에서와 같이 엔진(10)의 배기매니폴드(11)에서 방출되는 배기가스의 일부를 흡기매니폴드(12)로 유도하기 위해 배기가스재순환관(15)이 형성되어 있으며, 배기매니폴드(11)에서 배출되는 배기가스의 압력에 의해 작동하는 터보차져(13)가 배기라인의 일측에 형성되어 있다. 또한 흡기매니폴드(12)의 전방측에는 터보차져(13)에서 가압된 흡기를 냉각하기 위한 인터쿨러(14)가 형성되어 있다. 상기한 배기가스재순환관(15)의 도중에는 전자제어장치에 의해 제어되는 배기가스재순환밸브(20)가 형성되고, 그 후미에는 배기가스재순환밸브(20)를 통과한 배기가스가 흡기매니폴드(12) 측으로 유도될 수 있도록 벤츄리부(21)가 형성된다. 또한, 상기한 벤츄리부(21)를 통과한 배기가스의 흐름을원활하게 하기 위한 교축밸브(22)가 형성되어 있다.Therefore, to solve this problem, as shown in FIG. 5, an exhaust gas recirculation pipe 15 is formed to guide a part of the exhaust gas emitted from the exhaust manifold 11 of the engine 10 to the intake manifold 12. In addition, a turbocharger 13 operated by the pressure of the exhaust gas discharged from the exhaust manifold 11 is formed at one side of the exhaust line. Further, an intercooler 14 for cooling the intake air pressurized by the turbocharger 13 is formed on the front side of the intake manifold 12. An exhaust gas recirculation valve 20 controlled by an electronic controller is formed in the middle of the exhaust gas recirculation pipe 15, and exhaust gas passing through the exhaust gas recirculation valve 20 is intake manifold 12. Venturi portion 21 is formed to be guided to the side. In addition, a throttling valve 22 for smoothing the flow of the exhaust gas passing through the venturi part 21 is formed.

즉, 시동초기에는 엔진의 온도를 전자제어부가 감지하여 배기가스재순환밸브를 자동으로 개방시켜 엔진의 연소실에서 불완전연소되어 배기매니폴드로 배기되는 배기가스의 일부를 배기가스재순환관으로 재순환되도록 하여 흡기매니폴드로 유입되도록 하여 재연소시키도록 함으로서, 대기중으로 방출되는 탄화수소, 녹스 등의 유해물질의 배출을 줄여 대기오염을 예방하도록 하였다.In other words, at the start of the engine, the electronic control unit senses the engine temperature and automatically opens the exhaust gas recirculation valve so that part of the exhaust gas which is incompletely burned in the combustion chamber of the engine and exhausted to the exhaust manifold is recycled to the exhaust gas recirculation tube. By entering the manifold and reburning, air pollution is prevented by reducing the emission of harmful substances such as hydrocarbons and knox emitted to the atmosphere.

하지만, 상기와 같은 종래구조의 배기가스재순환장치는 배기가스재순환관의 도중에 벤츄리부가 형성되고, 벤츄리부를 통과한 배기가스의 흐름을 원활하게 하기 위한 교축밸브가 형성되므로서, 흡기매니폴드로 유입되는 흡기저항을 야기하여 체적효율의 감소를 유발하게 되므로 엔진성능을 저하시키게 되는 문제점이 있었다.However, the exhaust gas recirculation apparatus of the conventional structure as described above has a venturi part formed in the middle of the exhaust gas recirculation pipe, and a throttling valve is formed to smooth the flow of the exhaust gas passing through the venturi part, thereby flowing into the intake manifold. Since the intake resistance causes a decrease in the volumetric efficiency, there is a problem that the engine performance is lowered.

따라서 본 발명은 상기한 문제점을 개선하기 위하여 안출된 것으로서, 보다 상세하게는 디젤엔진의 배기재순환통로의 도중에 형성되어 배기매니폴드에서 유입된 배기가스를 수용한 다음, 엔진스피드센서와 가속페달센서 및 공기센서에서 측정된 측정값에 따라 전자제어장치가 솔레노이드를 작동시키므로서 엔진상황에 알맞도록 배기가스를 압축하여 유출구를 통해 흡기매니폴드에 보내도록 하는 디젤엔진의배기가스재순환밸브를 제공하는 데 목적이 있다.Therefore, the present invention has been made in order to improve the above problems, more specifically, formed in the exhaust recirculation passage of the diesel engine to accommodate the exhaust gas flowing in the exhaust manifold, and then the engine speed sensor and the accelerator pedal sensor and To provide an exhaust gas recirculation valve of a diesel engine, in which an electronic control unit operates a solenoid according to the measured value of an air sensor, thereby compressing the exhaust gas to be suitable for the engine situation and sending it to the intake manifold through the outlet. There is this.

본 발명은 상기와 같은 목적을 달성하기 위한 수단으로서,The present invention as a means for achieving the above object,

배기재순환가스의 양 및 작동압을 조절하기 위해 배기재순환라인의 도중에 형성되는 것에 있어서,In the middle of the exhaust recirculation line to control the amount and operating pressure of the exhaust recirculation gas,

배기매니폴드로부터 배기가스가 유입되는 유입구가 일측에 형성되며, 유입구와 직각방향이 되도록 배기가스 유출구가 형성되며, 유출구의 직하방으로 솔레노이드밸브가 형성되기 위한 원통형의 연결구가 형성되며, 유입구와 유출구가 연결되는 부분에 배기가스가 수용되는 챔버가 형성되는 하우징과;An inlet port through which exhaust gas flows from the exhaust manifold is formed on one side, and an exhaust gas outlet port is formed to be perpendicular to the inlet port, and a cylindrical connection port is formed to form a solenoid valve directly under the outlet port. A housing in which a chamber for receiving exhaust gas is formed at a portion to which the gas is connected;

상기한 유입구로 유입된 배기가스의 압력이 일정압 이상이 되면 작동되도록 제1밸브체와 제1스프링으로 구성되어 유입구 내부측에 형성된 유입통로를 개폐하는 제1밸브와;A first valve configured to open and close an inlet passage formed in the inlet, the first valve body and the first spring to operate when the pressure of the exhaust gas introduced into the inlet is equal to or higher than a predetermined pressure;

상기한 하우징 내의 챔버에 충진된 배기가스의 압력이 일정압 이상이 되면 작동되도록 제2밸브체와 제2스프링으로 구성되어 유출구 내부측에 형성된 유출통로를 개폐하는 제2밸브와;A second valve configured to open and close an outlet passage formed inside the outlet port by a second valve body and a second spring to operate when the pressure of the exhaust gas filled in the chamber in the housing is equal to or higher than a predetermined pressure;

상기한 유입구에서 유입된 배기가스를 일정량 흡입하여 압축된 상태로 유출구로 배출되도록 하기 위해 제2밸브의 제2밸브체 외주에 제3스프링에 의해 지지되도록 형성되어 상기 연결구를 따라 상하이동하는 피스톤과;A piston which is formed to be supported by a third spring on the outer circumference of the second valve body of the second valve so as to suck a predetermined amount of the exhaust gas introduced from the inlet to be discharged to the outlet in a compressed state; ;

상기한 제3스프링에 의해 탄력지지되는 피스톤을 간헐적으로 상측으로 이동시키기 위해 상기 하우징의 연결구의 하측에 형성되는 솔레노이드밸브; 로 구성되는 것을 특징으로 하고,A solenoid valve formed at a lower side of the connector of the housing to move the piston elastically supported by the third spring intermittently upward; Characterized in that,

상기한 솔레노이드밸브는 엔진스피드센서와 가속페달센서와 에어센서에서 측정된 값에 의해 전자제어장치의 제어에 따라 작동되는 것을 특징으로 하며,The solenoid valve is operated according to the control of the electronic control device by the value measured from the engine speed sensor, the accelerator pedal sensor and the air sensor,

상기한 피스톤은 상기 솔레노이드밸브의 작동에 따라서 에어탱크에서 공급되는 공기압에 의해 상향작동되는 것을 특징으로 한다.The piston may be operated upward by the air pressure supplied from the air tank according to the operation of the solenoid valve.

도 1은 본 발명에 위한 배기가스재순환장치의 구성도.1 is a block diagram of an exhaust gas recirculation apparatus for the present invention.

도 2는 본 발명에 의한 배기가스재순환밸브의 단면도.2 is a cross-sectional view of the exhaust gas recirculation valve according to the present invention.

도 3과 도 4는 본 발명에 의한 배기가스재순환밸브의 작동상태도.3 and 4 is an operating state of the exhaust gas recirculation valve according to the present invention.

도 5는 종래기술을 설명하기 위한 도면.5 is a view for explaining the prior art.

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

11 : 배기매니폴드 12 : 흡기매니폴드11 Exhaust Manifold 12 Intake Manifold

30 : 배기가스재순환밸브 31 : 하우징30 exhaust gas recirculation valve 31 housing

32 : 유입구 33 : 유입통로32: inlet 33: inlet passage

34 : 유출구 35 : 유출통로34: outlet 35: outlet

36 : 연결구 37 : 챔버36 connector 37 chamber

40 : 제1밸브 50 : 제2밸브40: first valve 50: second valve

60 : 피스톤 61 : 제3스프링60: piston 61: third spring

70 : 솔레노이드밸브70: solenoid valve

본 발명의 실시예를 첨부한 도면에 따라 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 위한 배기가스재순환장치의 구성도이며, 도 2는 본 발명에 의한 배기가스재순환밸브의 단면도이며, 도 3과 도 4는 본 발명에 의한 배기가스재순환밸브의 작동상태도이다.1 is a configuration diagram of an exhaust gas recirculation apparatus for the present invention, Figure 2 is a cross-sectional view of the exhaust gas recirculation valve according to the present invention, Figure 3 and Figure 4 is an operating state diagram of the exhaust gas recirculation valve according to the present invention.

도면중 도면부호 10은 엔진이며 도면부호 30은 배기매니폴드에서 유입된 배기가스의 양 및 작동압을 조절하기 위한 배기가스재순환밸브이다.In the drawing, reference numeral 10 denotes an engine and reference numeral 30 denotes an exhaust gas recirculation valve for adjusting the amount and operating pressure of the exhaust gas introduced from the exhaust manifold.

상기한 엔진(10)의 양측으로는 배기매니폴드(11)와 흡기매니폴드(12)가 형성되며, 배기매니폴드(11)에서 배출되는 배기가스의 압력에 의해 작동하는 터보차져(13)가 배기라인의 일측에 형성되어 있다. 또한 흡기매니폴드(12)의 전방측에는 터보차져(13)에서 가압된 흡기를 냉각하기 위한 인터쿨러(14)가 형성되어 있다.The exhaust manifold 11 and the intake manifold 12 are formed at both sides of the engine 10, and the turbocharger 13 operated by the pressure of the exhaust gas discharged from the exhaust manifold 11 is provided. It is formed on one side of the exhaust line. Further, an intercooler 14 for cooling the intake air pressurized by the turbocharger 13 is formed on the front side of the intake manifold 12.

그리고 배기매니폴드(11)에서 배출되는 배기가스의 일부를 흡기매니폴드(12)로 유도하기 위한 배기가스재순환라인(15)이 배기관(16)과 흡기관(17)의 도중에 연결되어 있다.An exhaust gas recirculation line 15 for guiding a part of the exhaust gas discharged from the exhaust manifold 11 to the intake manifold 12 is connected between the exhaust pipe 16 and the intake pipe 17.

상기한 배기가스재순환라인(15)의 도중에는 배기가스재순환밸브(30)가 형성되는데, 이 배기가스재순환밸브(30)의 하우징(31) 내부에는 공기압에 의해 작동하는 여러개의 밸브가 형성된다.An exhaust gas recirculation valve 30 is formed in the middle of the exhaust gas recirculation line 15, and a plurality of valves are formed in the housing 31 of the exhaust gas recirculation valve 30 by air pressure.

우선 상기한 배기가스재순환밸브(30)의 하우징(31)의 일측에는 유입구(32)가 형성되며, 상기 유입구(32)와 직각방향이 되도록 배기가스 유출구(34)가 형성되며,유출구(34)의 직하방으로 솔레노이드밸브(70)가 끼워지기 위한 원통형의 연결구(36)가 형성되며, 유입구(32)와 유출구(34)가 연결되는 부분에 배기가스가 수용되는 공간인 챔버(37)가 형성되어 있다.First, an inlet 32 is formed at one side of the housing 31 of the exhaust gas recirculation valve 30, and an exhaust gas outlet 34 is formed to be perpendicular to the inlet 32, and an outlet 34. A cylindrical connector 36 is formed to directly fit the solenoid valve 70 at the bottom thereof, and a chamber 37 that is a space for receiving exhaust gas is formed at a portion where the inlet 32 and the outlet 34 are connected. It is.

그리고 상기한 유입구(32)의 내부측으로는 상기한 챔버(37)와 연통되는 유입통로(33)가 형성되어 있으며, 상기 유출구(34)의 내부측으로는 상기 챔버(37)와 연통되는 유출통로(35)가 형성되어 있다.An inflow passage 33 communicating with the chamber 37 is formed at an inner side of the inlet 32, and an outlet passage communicating with the chamber 37 is formed at an inner side of the outlet 34. 35) is formed.

상기한 하우징(31) 내부로 유입되는 배기가스의 압력에 따라서 유입통로(33)를 개폐하는 제1밸브(40)가 형성되는데, 이 제1밸브(40)는 제1밸브체(41)와 제1스프링(42)로 구성된다.A first valve 40 is formed to open and close the inflow passage 33 according to the pressure of the exhaust gas flowing into the housing 31, and the first valve 40 is connected to the first valve body 41. It is composed of a first spring 42.

또한, 상기한 유출구(34)의 내부측으로는 상기 유출통로(35)를 개폐하기 위한 제2밸브(50)가 형성되는데, 이 제2밸브(50)는 제2밸브체(51)와 제2스프링(52)으로 구성된다.In addition, a second valve 50 for opening and closing the outlet passage 35 is formed inside the outlet 34, and the second valve 50 includes a second valve body 51 and a second valve. It is composed of a spring (52).

그리고 상기한 연결구(36)에는 유입구(32)에서 유입된 배기가스를 일정량 흡입하여 압축된 상태로 유출하도록 하기 위해 제2밸브체(51) 외주에 제3스프링(61)에 의해 지지되도록 형성되어 상기 연결구(36)를 따라 상하이동하는 피스톤(60)이 형성된다.In addition, the connector 36 is formed to be supported by the third spring 61 on the outer circumference of the second valve body 51 in order to inhale a certain amount of the exhaust gas introduced from the inlet 32 to flow out in a compressed state. A piston 60 swinging along the connector 36 is formed.

이 연결구(36)의 하부에는 상기한 피스톤(60)을 상하작동시키기 위한 솔레노이드밸브(70)가 형성되는데, 이 솔레노이드밸브(70)는 에어탱크에서 공급되는 공기압에 의해 작동되는 것이다. 즉, 에어탱크와 연결된 에어라인(71)의 내부에 솔레노이드밸브(70)가 형성되어 있으며, 솔레노이드밸브(70) 전방에 에어공급구(72)가형성되어 있다.The solenoid valve 70 for operating the piston 60 up and down is formed in the lower portion of the connector 36, the solenoid valve 70 is operated by the air pressure supplied from the air tank. That is, the solenoid valve 70 is formed in the air line 71 connected to the air tank, and the air supply port 72 is formed in front of the solenoid valve 70.

상기한 솔레노이드밸브(70)는 전자제어장치(ECU)의 제어에 의해 작동되는데, 이 전자제어장치(ECU)는 엔진스피드센서(81)와 가속페달센서(82)와 에어센서(83)에서 측정된 값에 따라서 상기 솔레노이드밸브(70)를 작동시키게 된다.The solenoid valve 70 is operated by the control of the electronic control unit (ECU), which is measured by the engine speed sensor 81, the accelerator pedal sensor 82, and the air sensor 83. The solenoid valve 70 is operated according to the set value.

이상과 같이 구성된 배기가스재순환밸브의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the exhaust gas recirculation valve configured as described above are as follows.

디젤엔진이 가동되어 배기매니폴드(11)에서 방출되는 배기가스의 일부는 배기가스재순환라인(15)로 유입되며, 배기가스재순환라인(15)으로 유입된 배기가스는 상기한 배기가스재순환밸브(30)로 공급된다.A part of the exhaust gas discharged from the exhaust manifold 11 by operating the diesel engine flows into the exhaust gas recirculation line 15, and the exhaust gas introduced into the exhaust gas recirculation line 15 is the exhaust gas recirculation valve ( 30).

배기가스재순환밸브(30)의 유입구(32)로 유입된 배기가스의 압력이 제1스프링(42)의 탄발력보다 높아지면 유입통로(33)에 일면이 밀착되어 있던 제1밸브체(41)가 하강하게 되므로서, 챔버(37)에 배기가스가 채워지게 된다.When the pressure of the exhaust gas flowing into the inlet 32 of the exhaust gas recirculation valve 30 is higher than the resilience force of the first spring 42, the first valve body 41 having one surface in close contact with the inflow passage 33. As is lowered, the exhaust gas is filled in the chamber 37.

이때 유출구(34)의 내측에 형성된 배기가스 유출통로(35)는 제2스프링(52)으로 탄력지지되는 제2밸브체(51)에 의해 닫힌 상태이다. 따라서 챔버(37)로 유입되는 배기가스는 도 3과 같이 피스톤(60)을 하강시키며 챔버(37)의 체적을 넓게 한다.At this time, the exhaust gas outlet passage 35 formed inside the outlet 34 is closed by the second valve body 51 elastically supported by the second spring 52. Therefore, the exhaust gas flowing into the chamber 37 lowers the piston 60 and widens the volume of the chamber 37 as shown in FIG. 3.

그리고 엔진스피드센서(81)와 가속페달센서(82)와 에어센서(83)에서 측정된 값에 따라 전자제어장치(ECU)에서는 솔레노이드밸브(70)를 작동시켜 에어탱크에서 에어라인(71)으로 공급되는 공기가 에어공급구(72) 쪽으로 유입되도록 한다.In addition, the solenoid valve 70 is operated in the ECU according to the values measured by the engine speed sensor 81, the accelerator pedal sensor 82, and the air sensor 83 to the air line 71 from the air tank. Air to be supplied is introduced into the air supply port (72).

이렇게 에어공급구(72)로 유입되는 공기압에 의해 상기한 피스톤(60)은 도 4와 같이 상승하게 되고 제2스프링(52)를 가압하면서 제2밸브체(51)가 상승하게 되어 유출통로(35)가 개방된다.As such, the piston 60 rises as shown in FIG. 4 by the air pressure flowing into the air supply port 72, and the second valve body 51 rises while pressurizing the second spring 52. 35) is opened.

그러면 개방된 유출통로(35)로는 챔버(37)에 수용되었던 배기가스가 가압되어 빠져나가게 되어 배기가스재순환라인(15)을 따라 흡기관(17)으로 유도되므로서 신기와 함께 흡기매니폴드(12)로 유입된다.Then, the open exhaust passage 35 is pressurized by the exhaust gas stored in the chamber 37 to be discharged to the intake pipe 17 along the exhaust gas recirculation line 15 and thus the intake manifold 12 with the new air. Flows into).

이상과 같이 구성되는 본 발명은 배기가스재순환라인에 형성되던 벤츄리부와, 벤츄리부를 통과한 배기가스의 흐름을 원활하게 하기 위해 형성되던 교축밸브가 삭제되므로서, 배기재순환가스의 저항을 줄여 엔진의 성능을 향상시킬 뿐만 아니라 엔진을 제작하는데 드는 원가의 절감 및 엔진의 중량을 감소시키는 데 커다란 효과가 있다.According to the present invention configured as described above, the venturi part formed in the exhaust gas recirculation line and the throttling valve formed to smooth the flow of the exhaust gas passing through the venturi part are eliminated, thereby reducing the resistance of the exhaust recirculating gas and reducing the Not only does it improve performance, it also has a significant effect on reducing the cost and weight of the engine.

Claims (3)

배기매니폴드(11)로부터 배기가스가 유입되는 유입구(32)가 일측에 형성되며, 유입구(32)와 직각방향이 되도록 배기가스 유출구(34)가 형성되며, 유출구(34)의 직하방으로 솔레노이드밸브(70)가 형성되기 위한 원통형의 연결구(36)가 형성되며, 유입구(32)와 유출구(34)가 연결되는 부분에 배기가스가 수용되는 챔버(37)가 형성되는 하우징(31)과;An inlet 32 through which exhaust gas flows from the exhaust manifold 11 is formed at one side, and an exhaust gas outlet 34 is formed to be perpendicular to the inlet 32, and the solenoid is directly below the outlet 34. A housing 31 having a cylindrical connector 36 for forming the valve 70 and having a chamber 37 accommodating the exhaust gas at a portion where the inlet 32 and the outlet 34 are connected; 상기한 유입구(32)로 유입된 배기가스의 압력이 일정압 이상이 되면 작동되도록 제1밸브체(41)와 제1스프링(42)으로 구성되어 유입구(32) 내부측에 형성된 유입통로(33)를 개폐하는 제1밸브(40)와;The inlet passage 33 formed inside the inlet 32 is composed of the first valve body 41 and the first spring 42 to be operated when the pressure of the exhaust gas introduced into the inlet 32 becomes above a predetermined pressure. A first valve 40 for opening and closing a); 상기한 하우징(31) 내의 챔버(37)에 충진된 배기가스의 압력이 일정압 이상이 되면 작동되도록 제2밸브체(51)와 제2스프링(52)으로 구성되어 유출구(34) 내부측에 형성된 유출통로(35)를 개폐하는 제2밸브(50)와;It consists of a second valve body 51 and a second spring 52 to be operated when the pressure of the exhaust gas filled in the chamber 37 in the housing 31 is above a certain pressure to the inside of the outlet 34 A second valve 50 which opens and closes the formed outlet passage 35; 상기한 유입구(32)에서 유입된 배기가스를 일정량 흡입하여 압축된 상태로 유출구(34)로 배출되도록 하기 위해 제2밸브(50)의 제2밸브체(51) 외주에 제3스프링(52)에 의해 지지되도록 형성되어 상기 연결구(36)를 따라 상하이동하는 피스톤(60)과;The third spring 52 is formed on the outer circumference of the second valve body 51 of the second valve 50 so as to suck a predetermined amount of the exhaust gas introduced from the inlet 32 to be discharged to the outlet 34 in a compressed state. A piston (60) which is formed to be supported by and moves along the connector (36); 상기한 제3스프링(61)에 의해 탄력지지되는 피스톤(60)을 간헐적으로 상측으로 이동시키기 위해 상기 하우징(31)의 연결구(36)의 하측에 형성되는 솔레노이드밸브(70); 로 구성되는 것을 특징으로 하는 디젤엔진의 배기가스재순환밸브.A solenoid valve 70 formed below the connector 36 of the housing 31 to move the piston 60 elastically supported by the third spring 61 upwardly intermittently; Exhaust gas recirculation valve of the diesel engine, characterized in that consisting of. 제 1 항에 있어서,The method of claim 1, 상기한 솔레노이드밸브(70)는 엔진스피드센서(81)와 가속페달센서(82)와 에어센서(83)에서 측정된 값에 의해 전자제어장치의 제어에 따라 작동되는 것을 특징으로 하는 디젤엔진의 배기가스재순환밸브.The solenoid valve 70 is operated according to the control of the electronic control unit by the value measured by the engine speed sensor 81, the accelerator pedal sensor 82 and the air sensor 83, the exhaust of the diesel engine, characterized in that Gas recirculation valve. 제 1 항에 있어서,The method of claim 1, 상기한 피스톤(60)은 상기 솔레노이드밸브(70)의 작동에 따라서 에어탱크에서 공급되는 공기압에 의해 상향작동되는 것을 특징으로 하는 디젤엔진의 배기가스재순환밸브.The piston (60) is an exhaust gas recirculation valve of the diesel engine, characterized in that the operation is up by the air pressure supplied from the air tank in accordance with the operation of the solenoid valve (70).
KR10-2000-0070830A 2000-11-27 2000-11-27 EGR valve for diesel engine KR100384139B1 (en)

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