KR20070005828A - Exhaust gas recirculation system - Google Patents

Exhaust gas recirculation system Download PDF

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Publication number
KR20070005828A
KR20070005828A KR1020050060857A KR20050060857A KR20070005828A KR 20070005828 A KR20070005828 A KR 20070005828A KR 1020050060857 A KR1020050060857 A KR 1020050060857A KR 20050060857 A KR20050060857 A KR 20050060857A KR 20070005828 A KR20070005828 A KR 20070005828A
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South Korea
Prior art keywords
exhaust gas
egr
pipe
valve
egr valve
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KR1020050060857A
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Korean (ko)
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KR101136236B1 (en
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두재균
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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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0276—Actuation of an additional valve for a special application, e.g. for decompression, exhaust gas recirculation or cylinder scavenging
    • 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
    • F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
    • 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

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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

An exhaust gas recirculation system is provided to reduce installation space and manufacturing costs by permitting an EGR valve to be cooled by an engine oil so that the length of the EGR pipe for passage of exhaust gas is shortened. An exhaust gas recirculation system comprises an EGR valve(18) connected to one side of an exhaust manifold; an EGR cooler(20) mounted on an outlet side of the EGR valve and connected to one side of an intake manifold so as to cool exhaust gas; and an oil heater(22) mounted on an outer surface of the EGR valve so that the EGR valve is cooled and an engine oil is heated through the heat exchange between the exhaust gas passing through the EGR valve and the engine oil.

Description

배기가스 재순환장치 { Exhaust Gas Recirculation System } Exhaust Gas Recirculation System

도 1은 종래 기술에 따른 배기가스 재순환장치의 구성도이다. 1 is a block diagram of an exhaust gas recirculation apparatus according to the prior art.

도 2는 본 발명에 따른 배기가스 재순환장치의 구성도이다.2 is a block diagram of an exhaust gas recirculation apparatus according to the present invention.

도 3은 본 발명에 따른 배기가스 재순환장치의 EGR 밸브 및 EGR 쿨러의 사시도이다.3 is a perspective view of an EGR valve and an EGR cooler of the exhaust gas recirculation apparatus according to the present invention.

도 4는 본 발명에 따른 배기가스 재순환장치의 오일히터 컨트롤 밸브의 단면도이다. 4 is a cross-sectional view of the oil heater control valve of the exhaust gas recirculation apparatus according to the present invention.

도 5는 본 발명에 따른 배기가스 재순환장치의 오일히터 컨트롤 밸브의 작동 상태도이다. 5 is an operational state diagram of the oil heater control valve of the exhaust gas recirculation apparatus according to the present invention.

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

10 : 엔진 12 : 배기 매니폴드 10 engine 12 exhaust manifold

14 : 흡기 매니폴드 16 : EGR 파이프 14 Intake manifold 16: EGR pipe

18 : EGR 밸브 20 : EGR 쿨러18: EGR valve 20: EGR cooler

22 : 오일히터 30 : 오일히터 컨트롤 밸브22: oil heater 30: oil heater control valve

38 : 제1배관 40 : 작동로드38: first pipe 40: operating rod

42 : 밸브판 44 : 작동부 42: valve plate 44: operating part

본 발명은 차량의 배기가스 재순환장치에 관한 것으로, 보다 상세하게는 EGR 밸브에 오일 히터를 설치하여 엔진오일을 히팅함으로써, 차량의 초기 주행시 엔진오일을 배기가스에 의해 가열하여 시동성 및 연비를 향상시킬 수 있는 차량의 배가스 재순환장치에 관한 것이다.The present invention relates to an exhaust gas recirculation apparatus of a vehicle, and more particularly, by installing an oil heater in an EGR valve to heat engine oil, thereby improving startability and fuel economy by heating engine oil by exhaust gas during initial driving of the vehicle. The present invention relates to a flue gas recirculation apparatus for a vehicle.

일반적으로 배기가스 재순환장치는 배기가스 중 일부를 배기계에서 흡기계로 재순환시키고 공기와 연료의 혼합기에 혼합하여 연소실에 공급하는 시스템을 말한다. 이와 같이 배기가스를 재순환시키면 연소온도가 낮아지게 되어 질소산화물(NOx)의 생성을 억제시킬 수 있다. In general, the exhaust gas recirculation apparatus refers to a system in which a part of the exhaust gas is recycled from the exhaust system to the intake machine, mixed with an air and fuel mixer, and supplied to the combustion chamber. By recycling the exhaust gas in this way, the combustion temperature is lowered, and the generation of nitrogen oxides (NOx) can be suppressed.

도 1은 종래 기술에 따른 배기가스 재순환장치의 구성도이다.1 is a block diagram of an exhaust gas recirculation apparatus according to the prior art.

종래 기술에 따른 배기가스 재순환장치는 엔진(102)에서 연소된 후 배기가스가 배출되는 배기 매니폴드(104)와 엔진(102)으로 흡기가 공급되는 흡기 매니폴드(106) 사이에 연결되어 배기 매니폴드(104)를 통과하는 배기가스 중 일부를 상기 흡입 매니폴드(106)로 재순환시키는 EGR 파이프(108)와, 상기 EGR 파이프(108) 상에 설치되어 상기 EGR 파이프(108)의 개폐 작용을 하는 EGR 밸브(110)와, 상기 EGR 파이프(108) 상에 설치되어 상기 EGR 파이프(108)를 통과하는 배기가스를 냉각하는 EGR 쿨러(112)로 구성된다.The exhaust gas recirculation apparatus according to the related art is connected between an exhaust manifold 104 where exhaust gas is discharged after being combusted in the engine 102 and an intake manifold 106 through which intake air is supplied to the engine 102. EGR pipe 108 for recycling a part of the exhaust gas passing through the fold 104 to the intake manifold 106, and is installed on the EGR pipe 108 to open and close the EGR pipe 108 An EGR valve 110 and an EGR cooler 112 installed on the EGR pipe 108 to cool exhaust gas passing through the EGR pipe 108.

상기 EGR 밸브(110)는 상기 흡기 매니폴드(106)에 형성되는 부압에 의해 개폐되어서 흡입 매니폴드(106)로 재순환되는 배기가스량을 조절한다. The EGR valve 110 is opened and closed by a negative pressure formed in the intake manifold 106 to adjust the amount of exhaust gas recycled to the intake manifold 106.

상기 EGR 쿨러(112)는 상기 EGR 파이프(108)가 양단에 연결되고 그 일측에는 엔진의 냉각수가 유입되는 유입구(120)가 형성되고 타측에는 EGR 쿨러(112)를 통과하면서 냉각작용을 완료한 냉각수가 배출되는 배출구(122)가 형성된다.The EGR cooler 112 has the inlet 120 through which the EGR pipe 108 is connected at both ends, and the coolant of the engine is introduced on one side thereof, and the coolant that completes the cooling operation while passing through the EGR cooler 112 on the other side. Is discharged outlet 122 is formed.

이와 같이 구성되는 종래 기술에 따른 배기가스 재순환장치는 흡기관에 형성되는 부압에 의해 상기 EGR 밸브(110)가 작동되면서 상기 EGR 파이프(108)를 개방하면 배기 매니폴드(104)를 통과하는 배기가스 중 일부가 EGR 파이프(108)를 통해 흡입 매니폴드(106)로 공급되어 흡기와 함께 엔진(102)의 연소실로 공급된다. 이때, 상기 EGR 파이프(108)를 통과하는 배기가스는 EGR 클러(112)에 의해 냉각된다. Exhaust gas recirculation apparatus according to the prior art configured as described above is the exhaust gas passing through the exhaust manifold 104 when the EGR pipe 108 is opened while the EGR valve 110 is operated by a negative pressure formed in the intake pipe. Some of this is supplied to the intake manifold 106 through the EGR pipe 108 and together with the intake air to the combustion chamber of the engine 102. At this time, the exhaust gas passing through the EGR pipe 108 is cooled by the EGR clutch 112.

그러나, 상기한 바와 같이 구성되는 종래 기술에 따른 배기가스 재순환장치는 배기가스의 효과적인 냉각을 위해 EGR 쿨러의 용량을 증대시켜야 되는 데, 그에 따라 배압이 상승하게 되고 무게 및 크기가 증가되어 설치 공간이 커지고 설계상 많은 제약을 받게 되는 문제점이 있다. However, the exhaust gas recirculation apparatus according to the prior art configured as described above needs to increase the capacity of the EGR cooler for effective cooling of the exhaust gas, thereby increasing the back pressure and increasing the weight and size, thereby increasing the installation space. There is a problem that becomes large and subject to many restrictions in design.

또한, 상기 EGR 밸브가 배기가스에 의한 열해가 발생되어 내구성 문제를 발생시킨다. In addition, the EGR valve causes thermal damage due to exhaust gas, which causes durability problems.

본 발명은 상기한 문제점을 해결하기 위하여 창출된 것으로서, 본 발명의 목적은 EGR 밸브에 엔진오일이 통과하는 오일히터를 설치하여 엔진오일에 의해 EGR 밸브를 냉각시킴으로써 EGR 밸브 및 EGR 쿨러를 열해로부터 보호할 수 있는 배기가스 재순환장치를 제공하는 데 있다. The present invention has been made to solve the above problems, and an object of the present invention is to install an oil heater through which engine oil passes through an EGR valve to protect the EGR valve and the EGR cooler from thermal damage by cooling the EGR valve by the engine oil. To provide an exhaust gas recirculation device that can be.

또한, EGR 밸브가 엔진오일에 의해 냉각되도록 하여 배기가스가 통과하는 EGR 파이프의 길이를 짧게 할 수 있어 설치공간을 줄일 수 있고 제조비용을 줄일 수 있는 배기가스 재순환장치를 제공하는 데 있다.In addition, the EGR valve is cooled by the engine oil to shorten the length of the EGR pipe through which the exhaust gas passes to reduce the installation space and to provide an exhaust gas recirculation apparatus that can reduce the manufacturing cost.

또한, EGR 밸브를 통과하는 배기가스에 의해 엔진오일이 가열되도록 하여 혹한기 지역 또는 일교차가 큰 지역에서 시동 초기 엔진 오일의 온도를 높일 수 있어 시동성 및 연비 향상 유해 배기가스를 저감시킬 수 있는 배기가스 재순환장치를 제공하는 데 있다.In addition, the engine oil is heated by the exhaust gas passing through the EGR valve, so that the temperature of the engine oil can be increased in the cold weather region or in a large crossover area, and the exhaust gas recirculation can reduce the starting efficiency and fuel efficiency. To provide a device.

상기한 과제를 실현하기 위한 본 발명에 따른 배기가스 재순환장치는 배기 매니폴드의 일측에 연결되는 EGR 밸브와, 상기 EGR 밸브의 토출측에 장착되고 흡기 매니폴더의 일측에 연결되어 상기 배기가스를 냉각시키는 EGR 쿨러와, 상기 EGR 밸브의 외주면에 장착되어 상기 EGR 밸브를 통과하는 배기가스와 엔진 오일이 열교환되면서 EGR 밸브를 냉각함과 아울러 엔진오일을 가열하는 오일히터를 포함하여 구성되는 것을 특징으로 한다.Exhaust gas recirculation apparatus according to the present invention for realizing the above object is mounted to the discharge side of the EGR valve, and connected to one side of the exhaust manifold and connected to one side of the intake manifold to cool the exhaust gas EGR cooler, and is mounted on the outer peripheral surface of the EGR valve characterized in that it comprises an oil heater for heating the engine oil while cooling the EGR valve while the exhaust gas and the engine oil passing through the EGR valve.

상기 오일히터는 엔진 오일이 통과하는 배관이 EGR 밸브의 외주면에 감겨진 상태로 형성되는 것을 특징으로 한다.The oil heater is characterized in that the pipe through which the engine oil passes is formed in a state wound around the outer peripheral surface of the EGR valve.

상기 오일히터의 흡입측에는 오일히터로 공급되는 엔진오일의 개폐작용을 하 는 오일히터 컨트롤 밸브가 설치되는 것을 특징으로 한다.The oil heater control valve is installed on the suction side of the oil heater to open and close the engine oil supplied to the oil heater.

이하, 첨부된 도면을 참조하여 본 발명의 일실시예를 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명에 따른 배기가스 재순환장치의 구성도이고, 도 3은 본 발명에 따른 배기가스 재순환장치의 EGR 밸브의 사시도이다.2 is a configuration diagram of the exhaust gas recirculation apparatus according to the present invention, Figure 3 is a perspective view of the EGR valve of the exhaust gas recirculation apparatus according to the present invention.

본 발명에 따른 배기가스 재순환장치는 엔진(10)의 연소실에서 연소가 완료된 배기가스가 배출되는 배기 매니폴드(12)의 일측에 연결되는 EGR 파이프(16)와, 상기 EGR 파이프(16)에 연결되는 EGR 밸브(18)와, 상기 EGR 밸브(18)의 토출측에 장착되고 흡기 매니폴더(14)의 일측에 연결되어 상기 배기가스를 냉각시키는 EGR 쿨러(20)와, 상기 EGR 밸브(18)의 외주면에 장착되어 상기 EGR 밸브(18)를 통과하는 배기가스와 엔진오일이 열교환되면서 EGR 밸브(18)를 냉각함과 아울러 엔진오일을 가열하는 오일히터(22)로 구성된다.Exhaust gas recirculation apparatus according to the present invention is connected to the EGR pipe 16 and the EGR pipe 16 is connected to one side of the exhaust manifold 12, the exhaust gas is completed combustion in the combustion chamber of the engine 10, The EGR valve 18, the EGR cooler 20 mounted on the discharge side of the EGR valve 18 and connected to one side of the intake manifold 14 to cool the exhaust gas, and the EGR valve 18 of the EGR valve 18. The exhaust gas passing through the EGR valve 18 and the engine oil are mounted on an outer circumferential surface to heat the engine oil while cooling the EGR valve 18.

상기 EGR 쿨러(20)는 일측에 엔진의 냉각수가 공급되는 흡입구(24)가 형성되고 타측에 배기가스의 냉각작용을 완료한 냉각수가 배출되는 배출구(26)가 형성된다. The EGR cooler 20 is formed with an inlet port 24 through which the cooling water of the engine is supplied at one side, and a discharge port 26 through which the cooling water having completed the cooling operation of the exhaust gas is formed at the other side.

상기 오일히터(22)는 오일이 통과하는 배관이 EGR 밸브(18)의 외주면에 감겨진 상태로 형성되어 엔진오일이 통과하면서 상기 EGR 밸브(18)를 통과하는 배기가스와 열교환된다. 그리고, 상기 오일히터(22)의 흡입측에는 오일히터(22)로 공급되는 엔진오일의 개폐작용을 하는 오일히터 컨트롤 밸브(30)가 설치된다.The oil heater 22 is formed in a state in which a pipe through which oil passes is wound around the outer circumferential surface of the EGR valve 18 to exchange heat with the exhaust gas passing through the EGR valve 18 while the engine oil passes. In addition, an oil heater control valve 30 is installed at the suction side of the oil heater 22 to open and close the engine oil supplied to the oil heater 22.

상기 오일히터 컨트롤 밸브(30)는 도 4에 도시된 바와 같이, 오일히터(22)와 연결되는 제1배관(32)과 EGR 쿨러(20)와 연결되는 제2배관(34)과 상기 엔진오일이 유입되는 제3배관(36)이 각각 연결되는 밸브바디(38)와, 상기 밸브바디(38)의 상측에 설치되는 작동부(44)와, 상기 작동부(44)에 연결되어 상기 밸브바디(38)에 직선 이동 가능하게 배치되는 작동로드(40)와, 상기 작동로드(40)의 끝부분에 장착되어 배관의 개폐작용을 하는 밸브판(42)으로 구성된다.As shown in FIG. 4, the oil heater control valve 30 includes a first pipe 32 connected to the oil heater 22 and a second pipe 34 connected to the EGR cooler 20 and the engine oil. The valve body 38 is connected to each of the incoming third pipe 36, the operating unit 44 is installed on the upper side of the valve body 38, and the valve body is connected to the valve body The operation rod 40 is arranged on the 38 so as to be linearly movable, and the valve plate 42 is mounted on the end of the operation rod 40 to open and close the pipe.

여기에서, 상기 작동부(44)는 부압에 의해 상기 작동로드를 직선 이동시키는 타입 또는 전원이 인가되면 상기 작동로드를 직선 이동시키는 솔레노이드 타입 등 다양한 형태로 형성될 수 있다. Here, the operating unit 44 may be formed in various forms such as a type for linearly moving the operating rod by a negative pressure or a solenoid type for linearly moving the operating rod when power is applied.

이와 같이 구성되는 오일히터 컨트롤 밸브(30)의 작용을 살펴보면, 먼저 엔진오일을 냉각하고 할 경우에는 도 4에 도시된 바와 같이, 작동부(44)가 작동되어 상기 밸브판(42)이 제1배관(32)을 폐쇄시킨다. 그러면, 상기 제3배관(36)을 통해 공급되는 엔진오일은 제2배관(34)을 통해 EGR 쿨러(20)로 유입되어 상기 EGR 쿨러(20)를 통과하면서 냉각된다.Looking at the operation of the oil heater control valve 30 configured as described above, when the engine oil is first cooled, as shown in Figure 4, the operating unit 44 is operated so that the valve plate 42 is the first The pipe 32 is closed. Then, the engine oil supplied through the third pipe 36 is introduced into the EGR cooler 20 through the second pipe 34 and cooled while passing through the EGR cooler 20.

그리고, 엔진오일을 가열하고자 할 경우에는 도 5에 도시된 바와 같이, 작동부(44)가 작동되어 상기 작동로드(40)가 직선 이동되면서 밸브판(42)이 제2배관(34)을 폐쇄시킨다. 그러면, 제3배관(36)으로 유입되는 엔진오일은 제1배관(32)을 통해 오일히터(22)를 통과하면서 EGR 밸브(18)를 통과하는 배기가스와 열교환되면서 가열된다. When the engine oil is to be heated, as shown in FIG. 5, the operation unit 44 is operated to move the operation rod 40 linearly, and the valve plate 42 closes the second pipe 34. Let's do it. Then, the engine oil flowing into the third pipe 36 is heated while heat-exchanging with the exhaust gas passing through the EGR valve 18 while passing through the oil heater 22 through the first pipe 32.

상기한 바와 같이 구성된 본 발명에 따른 배기가스 재순환장치의 작용을 다음에서 설명한다. The operation of the exhaust gas recirculation apparatus according to the present invention configured as described above will be described below.

먼저, EGR 밸브(18)가 작동되면 상기 EGR 파이프(16)가 개방되어 배기 메니 폴드(12)를 통과하는 배기가스 중 일부가 EGR 밸브(18)를 통과한다. 이때, 상기에서 설명한 바와 같이, 엔진오일 컨트롤 밸브(30)가 작동되어 EGR 밸브(18)의 외주면에 장착된 오일히터(22)로는 엔진오일이 통과하면서 EGR 밸브(18)를 통과하는 배기가스와 열교환되면서 엔진오일은 가열되고 배기가스를 냉각된다. 따라서, 상기 EGR 밸브(18)는 엔진오일에 의해 냉각되기 때문에 배기가스에 의해 열화를 입는 것을 방지할 수 있다. First, when the EGR valve 18 is operated, the EGR pipe 16 is opened so that some of the exhaust gas passing through the exhaust manifold 12 passes through the EGR valve 18. In this case, as described above, the engine oil control valve 30 is operated to the oil heater 22 mounted on the outer circumferential surface of the EGR valve 18 and exhaust gas passing through the EGR valve 18 while the engine oil passes. During heat exchange, the engine oil is heated and the exhaust gas is cooled. Therefore, since the EGR valve 18 is cooled by the engine oil, it is possible to prevent deterioration by the exhaust gas.

상기 EGR 밸브(18)를 통과한 배기가스는 EGR 쿨러(20)를 통과하면서 냉각작용을 한다. 즉, EGR 쿨러(20)의 흡입구(24)를 통해 엔진의 냉각수가 유입되어 EGR 쿨러(20)를 통과하는 배기가스를 냉각시킨다. 그리고, 상기 EGR 쿨러(20)를 통과하면서 냉각된 배기가스는 흡입 매니폴드(14)로 공급되어 흡기와 함께 엔진(10)의 연소실로 공급된다. The exhaust gas passing through the EGR valve 18 passes through the EGR cooler 20 to cool. That is, the cooling water of the engine is introduced through the inlet 24 of the EGR cooler 20 to cool the exhaust gas passing through the EGR cooler 20. The exhaust gas cooled while passing through the EGR cooler 20 is supplied to the intake manifold 14 and supplied to the combustion chamber of the engine 10 together with the intake air.

따라서, 상기와 같이 구성되고 작용되는 본 발명에 따른 배기가스 재순환장치는 EGR 밸브의 외주면에 오일히터를 설치하여 엔진오일이 통과하도록 함으로써, 상기 EGR 밸브를 통과하는 배기가스와 열교환되어 EGR 밸브의 냉각작용을 수행하여 EGR 밸브가 배기가스에 의해 열화를 입는 것을 방지할 수 있는 이점이 있다. Therefore, the exhaust gas recirculation apparatus according to the present invention constructed and operated as described above allows the engine oil to pass by installing an oil heater on the outer circumferential surface of the EGR valve, thereby exchanging heat with the exhaust gas passing through the EGR valve to cool the EGR valve. By performing the action, there is an advantage that the EGR valve can be prevented from being degraded by the exhaust gas.

또한, 엔진오일에 의해 배기가스가 일정 정도 냉각이 되기 때문에 EGR 쿨러의 용량을 크게 할 필요가 없어 EGR 쿨러의 크기를 줄일 수 있으며, 상기 EGR 밸브와 배기 매니폴드 사이를 연결하는 EGR 파이프의 길이를 짧게 할 수 있어 제조비용 을 줄이고 설치 공간을 축소할 수 있는 이점이 있다. In addition, since the exhaust gas is cooled to some extent by the engine oil, it is not necessary to increase the capacity of the EGR cooler, thereby reducing the size of the EGR cooler. It can be shortened to reduce manufacturing costs and reduce installation space.

또한, 배기가스에 의해 엔진오일을 가열함으로써, 혹한기 지역 또는 일교차가 큰 지역에서 시동 초기 엔진 오일의 온도를 높일 수 있어 시동성 및 연비 향상 유해 배기가스를 저감시킬 수 있다.In addition, by heating the engine oil with the exhaust gas, the temperature of the starting engine oil can be increased in a cold weather region or a region having a large crossover, thereby improving the startability and fuel efficiency, and reducing the harmful exhaust gas.

Claims (5)

배기 매니폴드의 일측에 연결되는 EGR 밸브와;An EGR valve connected to one side of the exhaust manifold; 상기 EGR 밸브의 토출측에 장착되고 흡기 매니폴더의 일측에 연결되어 상기 배기가스를 냉각시키는 EGR 쿨러와;An EGR cooler mounted on the discharge side of the EGR valve and connected to one side of an intake manifold to cool the exhaust gas; 상기 EGR 밸브의 외주면에 장착되어 상기 EGR 밸브를 통과하는 배기가스와 엔진 오일이 열교환되면서 EGR 밸브를 냉각함과 아울러 엔진오일을 가열하는 오일히터를 포함하여 구성되는 것을 특징으로 하는 배기가스 재순환장치.And an oil heater mounted on an outer circumferential surface of the EGR valve to cool the EGR valve while heating the engine oil while the exhaust gas passing through the EGR valve and the engine oil are heat-exchanged. 제 1 항에 있어서, The method of claim 1, 상기 오일히터는 엔진 오일이 통과하는 배관이 EGR 밸브의 외주면에 감겨진 상태로 형성되는 것을 특징으로 하는 배기가스 재순환장치.The oil heater is an exhaust gas recirculation apparatus, characterized in that the pipe through which the engine oil passes is formed in a state wound around the outer peripheral surface of the EGR valve. 제 1 항에 있어서, The method of claim 1, 상기 오일히터의 흡입측에는 오일히터로 공급되는 엔진오일의 개폐작용을 하는 오일히터 컨트롤 밸브가 설치되는 것을 특징으로 하는 배기가스 재순환장치.Exhaust gas recirculation apparatus characterized in that the oil heater control valve for opening and closing the engine oil supplied to the oil heater is installed on the suction side of the oil heater. 제 3 항에 있어서, The method of claim 3, wherein 상기 오일히터 컨트롤 밸브는 상기 오일히터와 연결되는 제1배관과 EGR 쿨러와 연결되는 제2배관과 상기 엔진오일이 유입되는 제3배관이 각각 연결되는 밸브바디와;The oil heater control valve includes a valve body to which the first pipe connected to the oil heater and the second pipe connected to the EGR cooler and the third pipe to which the engine oil flows are respectively connected; 상기 밸브바디의 상측에 설치되는 작동부와;An operating part installed on an upper side of the valve body; 상기 작동부에 연결되어 상기 밸브바디에 직선 이동 가능하게 배치되는 작동로드와;An operation rod connected to the operation unit and disposed to be linearly movable in the valve body; 상기 작동로드의 끝부분에 장착되어 배관의 개폐작용을 하는 밸브판으로 구성되는 것을 특징으로 하는 배기가스 재순환장치.Exhaust gas recirculation apparatus characterized in that the valve plate is mounted to the end of the operation rod to open and close the pipe. 제 4 항에 있어서, The method of claim 4, wherein 상기 오일히터 컨트롤 밸브는 엔진오일을 냉각하고 할 경우에는 밸브판이 제1배관을 폐쇄시키도록 작동되고, 엔진오일을 가열하고자 할 경우에는 상기 제2배관을 폐쇄시키도록 작동되는 것을 특징으로 하는 배기가스 재순환장치.The oil heater control valve is operated to cool the engine oil and the valve plate to close the first pipe, and to close the second pipe to heat the engine oil, characterized in that the exhaust gas is operated Recirculation device.
KR1020050060857A 2005-07-06 2005-07-06 Exhaust Gas Recirculation System KR101136236B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100844565B1 (en) * 2007-05-30 2008-07-08 현대자동차주식회사 Exhaust gas recirculation system for v8 type diesel engine
US9353705B2 (en) 2012-08-10 2016-05-31 Hyundai Motor Company Cooler system for vehicle

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* Cited by examiner, † Cited by third party
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KR0134563Y1 (en) * 1996-06-29 1999-03-20 김영귀 Exhaust gas recirculation apparatus
JPH11311114A (en) * 1998-04-28 1999-11-09 Aisin Seiki Co Ltd Lubricating device for engine balancer
KR100369148B1 (en) 2000-06-21 2003-01-24 기아자동차주식회사 Exhaust gas recirculation system for diesel engine
KR100391410B1 (en) 2000-11-15 2003-07-16 기아자동차주식회사 Exhaust gas recirculation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100844565B1 (en) * 2007-05-30 2008-07-08 현대자동차주식회사 Exhaust gas recirculation system for v8 type diesel engine
US9353705B2 (en) 2012-08-10 2016-05-31 Hyundai Motor Company Cooler system for vehicle

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