KR20100116376A - Exhaust gas recirculation system - Google Patents

Exhaust gas recirculation system Download PDF

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Publication number
KR20100116376A
KR20100116376A KR1020090035052A KR20090035052A KR20100116376A KR 20100116376 A KR20100116376 A KR 20100116376A KR 1020090035052 A KR1020090035052 A KR 1020090035052A KR 20090035052 A KR20090035052 A KR 20090035052A KR 20100116376 A KR20100116376 A KR 20100116376A
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South Korea
Prior art keywords
exhaust gas
line
easy
valve
cooling water
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KR1020090035052A
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Korean (ko)
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정상화
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현대자동차주식회사
기아자동차주식회사
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Priority to KR1020090035052A priority Critical patent/KR20100116376A/en
Publication of KR20100116376A publication Critical patent/KR20100116376A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • 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
    • F02M26/22—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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • F01P2003/2292—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point with thermostatically controlled by-pass
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

PURPOSE: An exhaust gas recirculation system, which prevents the condensation on an exhaust gas recycle valve, is provided to control the cooling of a recycle exhaust gas according to the temperature of the gas. CONSTITUTION: An exhaust gas recirculation system comprises an intake manifold(130), an exhaust manifold(100), an EGR valve(110), a bypass line and a bypass valve(135). The air provided to a combustion chamber flows in the intake manifold. The exhaust gas burnt in the combustion chamber flows in the exhaust manifold. The EGR valve controls the flow amount of the recycle exhaust gas. The bypass line is installed in the back-end of the EGR valve.

Description

배기가스 재순환 시스템{EXHAUST GAS RECIRCULATION SYSTEM}Exhaust gas recirculation system {EXHAUST GAS RECIRCULATION SYSTEM}

본 발명은 배기가스 재순환 시스템에 관한 것으로서, 보다 상세하게는 배기매니폴드에서 흡기매니폴드로 배기가스를 재순환시키는 배기가스 재순환 시스템에 관한 것이다.The present invention relates to an exhaust gas recirculation system, and more particularly to an exhaust gas recirculation system for recycling exhaust gas from the exhaust manifold to the intake manifold.

차량에 탑재되는 대부분의 디젤엔진(diesel engine)에는 배기가스 규제에 대응하기 위해 배기가스 재순환 시스템이 설치된다.Most diesel engines in vehicles are equipped with an exhaust gas recirculation system in order to respond to the emission regulations.

배기가스 재순환 시스템은 엔진에서 배출되는 배기가스의 일부를 실린더의 흡기 장치로 되돌림으로써 엔진의 연소 온도를 내리고, NOx의 발생량을 저감시킨다.The exhaust gas recirculation system lowers the combustion temperature of the engine and reduces the amount of NOx generated by returning a part of the exhaust gas discharged from the engine to the intake device of the cylinder.

한편, 재순환되는 배기가스는 설정온도로 냉각되어 흡기매니폴드로 공급되도록, 이지알밸브와 이지알쿨러가 배치되는데, 재순환배기가스를 보다 효율적이고 안정적으로 냉각시키면서 재순환시키는 시스템이 절실하다.Meanwhile, an easy valve and an easy cooler are disposed so that the exhaust gas to be recycled is cooled to a set temperature and supplied to the intake manifold, and a system for recirculating the exhaust gas while cooling the exhaust gas more efficiently and stably is urgently needed.

따라서, 본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 창출된 것으 로, 본 발명의 목적은 재순환배기가스를 보다 효율적이고 안정적으로 냉각시키면서 재순환시키는 배기가스 재순환 시스템을 제공하는 것이다.Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide an exhaust gas recirculation system for recirculating the exhaust gas while cooling the exhaust gas more efficiently and stably.

이러한 목적을 달성하기 위한 본 발명에 따른 배기가스 재순환 시스템은, 연소용 공기를 연소실로 공급하는 흡기매니폴드와 상기 연소실에서 연소된 배기가스가 배기되는 배기매니폴드, 상기 배기매니폴드에서 상기 흡기매니폴드로 배기가스를 재순환시키는 이지알라인에 설치되어 재순환되는 배기가스의 흐름양을 조절하는 이지알밸브, 상기 이지알밸브 후단부에 설치되어 재순환되는 배기가스를 냉각시키는 이지알쿨러 전단부와 상기 이지알쿨러의 후단부를 연결하는 바이패스라인, 및 상기 바이패스라인에 설치되어 재순환배기가스의 온도가 설정온도보다 낮은 경우 열리고, 높은 경우 닫히는 바이패스밸브를 포함한다.In order to achieve the above object, the exhaust gas recirculation system according to the present invention comprises an intake manifold for supplying combustion air to a combustion chamber, an exhaust manifold for exhausting exhaust gas burned in the combustion chamber, An IG valve installed in the EZ-alline to recycle the exhaust gas to the fold and an IG-al valve installed at the rear end of the EZ-R valve to cool the recycled exhaust gas. It includes a bypass line for connecting the rear end of the easy cooler, and the bypass valve is installed in the bypass line is opened when the temperature of the recycle exhaust gas is lower than the set temperature, and closed when the high temperature.

재순환배기가스는 상기 이지알밸브, 상기 이지알쿨러를 순차적으로 지나서 상기 흡기매니폴드로 공급되는 것을 특징으로 한다.The recycle exhaust gas is sequentially passed through the easy R valve and the easy R cooler to the intake manifold.

라디에이터에서 워터펌프로 냉각수라인이 설치되고, 상기 냉각수라인의 전단부에 설치된 써모스탯을 더 포함하며, 상기 써모스탯을 지난 냉각수는 상기 이지알밸브를 냉각시킴으로써 상기 재순환배기가스를 냉각시키는 것을 특징으로 한다.A coolant line is installed from the radiator to the water pump, and further includes a thermostat installed at the front end of the coolant line, wherein the coolant passing through the thermostat cools the recycle exhaust gas by cooling the EZ valve. do.

상기 이지알밸브의 전단부에 배치된 상기 이지알라인은 상기 냉각수라인과 설정된 길이가 인접하게 또는 평행하게 배치되어 상기 이지알라인를 지나는 재순환배기가스를 냉각시키는 것을 특징으로 한다.The easy line disposed at the front end of the easy valve has a set length adjacent to or parallel to the cooling water line, characterized in that for cooling the recycle exhaust gas passing through the easy line.

상기 이지알밸브와 상기 써모스탯이 설치되는 하나의 일체형 바디 내부에 상 기 이지알라인과 상기 냉각수라인이 일정한 두께의 한 격벽을 두고 형성됨으로써, 상기 이지알라인을 지나는 재순환배기가스를 냉각시키는 것을 특징으로 한다.The easy-alline and the cooling water line are formed with a partition wall having a constant thickness in one integrated body in which the easy-valve valve and the thermostat are installed, thereby cooling the recycle exhaust gas passing through the easy-line. It features.

일체형 상기 바디에서 상기 이지알라인과 상기 냉각수라인이 서로 인접한 부분에서, 냉각수의 흐름방향과 재순환배기가스의 흐름방향을 반대로 흐르도록 하는 것을 특징으로 한다.In the integral body, the easy line and the coolant line are adjacent to each other, so that the flow direction of the coolant flows and the flow direction of the recycle exhaust gas is reversed.

상기 이지알라인은, 상기 바이패스밸브가 설치된 매인라인, 상기 바이패스밸브 전단부의 상기 매인라인에서 분기되어 재순환배기가스가 일방향으로 흐르는 제1라인, 및 상기 바이패스밸브 후단부 상기 매인라인에서 분기되어 상기 제1라인과는 평행하게 배치되고, 상기 일방향과는 반대방향으로 배기가스가 흐르는 제2라인을 포함하고, 상기 제1라인과 상기 제2라인 사이에 상기 이지알쿨러가 배치된다.Wherein the air line is divided into a first line in which the bypass valve is installed and a second line in which recirculated exhaust gas is branched in the first in-line of the front end portion of the bypass valve and flows in one direction, And a second line disposed in parallel with the first line, in which exhaust gas flows in a direction opposite to the one direction, and the EZ-cooler is disposed between the first line and the second line.

상술한 바와 같이 본 발명에 따른 배기가스 재순환 시스템에 의하면, 이지알쿨러를 바이패스하는 바이패스라인을 형성하고, 이에 바이패스밸브를 설치함으로써, 재순환배기가스의 온도에 따라서 재순환배기가스의 냉각효율을 효율적으로 제어할 수 있다.As described above, according to the exhaust gas recirculation system of the present invention, the bypass line for bypassing the idler cooler is formed, and the bypass valve is provided therein, so that the cooling efficiency of the recirculated exhaust gas in accordance with the temperature of the recirculated exhaust gas Can be controlled efficiently.

또한, 이지알쿨러 전단에 이지알밸브를 설치함으로써 이지알밸브에 응축수가 형성되는 문제점을 해소할 수 있고, 이지알밸브를 냉각하면서 재순환배기가스를 미리 냉각시킬 수 있다.In addition, by installing the ESR valve in front of the ESR cooler, the condensed water may be eliminated in the ESR valve, and the recycle exhaust gas may be cooled in advance while the ESR valve is cooled.

또한, 하나의 일체형 바디 내부에 이지알라인과 냉각수 라인을 서로 인접하게 형성하고, 인접한 구간에서 재순환배기가스와 냉각수가 서로 반대방향으로 흐르 게 함으로써 재순환배기가스의 냉각효율을 향상시킬 수 있다.In addition, the all-in-one and the cooling water lines are formed adjacent to each other within one integral body, and the recirculated exhaust gas and the cooling water flow in opposite directions in the adjacent section, thereby improving the cooling efficiency of the recirculated exhaust gas.

이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 배기가스 재순환 시스템에 대한 개략적인 구성도이고, 도 2는 본 발명의 실시예에 따른 배기가스 재순환 시스템을 구비한 엔진 시스템의 사시도이다.1 is a schematic diagram of an exhaust gas recirculation system according to an embodiment of the present invention, Figure 2 is a perspective view of an engine system having an exhaust gas recirculation system according to an embodiment of the present invention.

도 1을 참조하면, 배기가스 재순환 시스템은 배기매니폴드(100), 실린더헤드(105), 및 흡기매니폴드(130), 이들을 순차적으로 지나는 이지알라인(205)을 포함하고, 상기 이지알라인(205)에는 이지알밸브(110) 및 이지알쿨러(120)가 순차적으로 설치된다.Referring to Figure 1, an exhaust gas recirculation system includes an exhaust manifold 100, a cylinder head 105, and an intake manifold 130, an all-in-one 205 passing through them sequentially, An EZ valve 110 and an EZ cooler 120 are sequentially installed at 205.

상기 흡기매니폴드(130)는 공기를 연소실로 공급하고, 연소실로 공급된 공기와 연료가 연소실에서 연소된 후에는, 상기 배기매니폴드(100)로 배출된다.The intake manifold 130 supplies air to the combustion chamber, and after the air and fuel supplied to the combustion chamber are combusted in the combustion chamber, it is discharged to the exhaust manifold 100.

상기 이지알밸브(110)는 엔진시스템의 전자제어유닛의 신호에 따라서, 열리거나 닫힘으로써 상기 이지알라인(205)을 통과하는 재순환배기가스의 흐름양을 제어한다.The easy valve 110 controls the amount of recycle exhaust gas passing through the easy line 205 by being opened or closed in response to a signal from the electronic control unit of the engine system.

아울러, 상기 이지알라인(205)과 인접하여 냉각수라인(300)이 배치되고, 상기 냉각수라인(300)에는 써모스탯(115)이 배치된다.In addition, a coolant line 300 is disposed adjacent to the easy-alline 205, and a thermostat 115 is disposed in the coolant line 300.

상기 써모스탯(115)은 냉각수 또는 엔진의 온도에 따라서 열리거나 닫히는데, 냉각수 온도가 설정온도보다 낮은 경우에는 닫히고, 설정온도보다 높으면 열리 게 되는 것이다.The thermostat 115 is opened or closed according to the temperature of the coolant or the engine, and is closed when the coolant temperature is lower than the set temperature, and is opened when the thermostat 115 is higher than the set temperature.

도 1을 다시 참조하면, 상기 이지알쿨러(120)의 전단부와 후단부는 바이패스라인으로 연결되고, 상기 바이패스라인 중간에는 바이패스밸브(135)가 설치된다.Referring back to FIG. 1, the front and rear ends of the EZC cooler 120 are connected to a bypass line, and a bypass valve 135 is installed in the middle of the bypass line.

상기 바이패스밸브(135)는 엔진의 전자제어유닛의 작동신호에 따라서, 상기 이지알라인(205)을 흐르는 배기가스의 온도가 설정된 온도보다 낮은 경우에는 열리고, 설정된 온도보다 높은 경우에는 닫힘으로써 재순환배기가스의 온도를 효율적으로 제어한다.The bypass valve 135 is opened when the temperature of the exhaust gas flowing through the easy line 205 is lower than the set temperature, and closed when the temperature is higher than the set temperature according to the operation signal of the electronic control unit of the engine. Control the temperature of the exhaust gas efficiently.

도 2를 참조하면, 상기 이지알라인(205)에서 상기 흡기매니폴드(130) 전단부에는 상기 이지알쿨러(120)가 배치된다.Referring to FIG. 2, the easy R cooler 120 is disposed at the front end of the intake manifold 130 in the easy R line 205.

좀 더 상세하게 설명하면, 상기 이지알라인(205)은 배기가스가 흐르는 매인라인(205a), 상기 바이패스밸브(135)의 전단부의 상기 매인라인(205a)에서 분기되어 재순환배기가스가 일방향으로 흐르는 제1라인(205b), 및 상기 바이패스밸브(135)의 후단부의 상기 매인라인(205a)에서 분기되어 상기 제1라인(205b)과는 평행하게 배치되고, 상기 일방향과는 반대방향으로 배기가스가 흐르는 제2라인(205c)을 포함하고, 상기 제1라인(205b)과 상기 제2라인(205c) 사이에 상기 이지알쿨러(120)가 배치된다. More specifically, the above-mentioned all-in-line 205 branches from the in-line 205a in which exhaust gas flows, the in-line 205a in the front end of the bypass valve 135, and the recirculated exhaust gas flows in one direction The first line 205b flowing through the branch line 205a branched from the main line 205a at the rear end of the bypass valve 135 is disposed in parallel with the first line 205b and exhausted in a direction opposite to the one direction. A second line 205c through which gas flows, and the EZC cooler 120 is disposed between the first line 205b and the second line 205c.

전술한 바와 같이, 상기 제1라인(205b)과 상기 제2라인(205c) 사이에 상기 이지알쿨러(120)가 배치됨으로써 냉각효율을 향상시킬 수 있다. 아울러, 상기 바이패스밸브(135)는 상기 이지알라인(205)을 흐르는 배기가스의 온도가 설정된 온도보다 낮은 경우에는 열리고, 설정된 온도보다 높은 경우에는 닫힘으로써 재순환배기 가스의 온도를 효율적으로 제어한다.As described above, the EZR cooler 120 may be disposed between the first line 205b and the second line 205c to improve cooling efficiency. In addition, the bypass valve 135 is opened when the temperature of the exhaust gas flowing through the easy line 205 is lower than the set temperature, and closed when it is higher than the set temperature, thereby effectively controlling the temperature of the recycle exhaust gas. .

도 3은 본 발명의 실시예에 따른 배기가스 재순환 시스템에서 냉각수와 재순환배기가스의 흐름을 개략적으로 도시한 구성도이다.3 is a schematic view showing the flow of cooling water and recirculated exhaust gas in the exhaust gas recirculation system according to the embodiment of the present invention.

도 3을 참조하면, 재순환배기가스가 우측에서 좌측 방향으로 흐르는 이지알라인(205)이 일방향으로 배치되고, 그 전단에는 상기 이지알밸브(110)가 배치된다.Referring to FIG. 3, the easy-alline 205 in which the recycle exhaust gas flows from the right side to the left-side direction is disposed in one direction, and the easy-valve valve 110 is disposed at the front end thereof.

아울러, 상기 이지알라인(205)과 인접하고 평행하게 상기 냉각수가 좌측에서 우측 방향으로 흐르는 상기 냉각수라인(300)이 일방향으로 배치되고, 그 전단부에는 상기 써모스탯(115)이 배치된다.In addition, the cooling water line 300 in which the cooling water flows in the left-to-right direction in parallel to the air gap 205 is disposed in one direction, and the thermostat 115 is disposed at the front end of the cooling water line.

상기 이지알밸브(110)는 엔진시스템의 전자제어유닛의 신호에 따라서, 열리거나 닫힘으로써 상기 이지알라인(205)을 통과하는 재순환배기가스의 흐름양을 제어하고, 상기 써모스탯(115)은 냉각수 온도가 설정온도보다 낮은 경우에는 닫히고, 설정온도보다 높으면 열리게 된다.The easy valve 110 is opened or closed in accordance with the signal of the electronic control unit of the engine system to control the flow amount of the recycle exhaust gas passing through the easy line 205, the thermostat 115 is It is closed when the coolant temperature is lower than the set temperature, and opened when the coolant temperature is higher than the set temperature.

상기 써모스탯(115)에 의해서 상기 냉각수라인(300)을 지나는 냉각수는 상기 이지알라인(205)을 지나는 재순환배기가스를 냉각시킨다. 또한, 냉각수는 상기 이지알밸브(110)를 냉각시키면서 재순환배기가스를 냉각시킨다.The coolant passing through the coolant line 300 by the thermostat 115 cools the recycle exhaust gas passing through the easy line 205. In addition, the cooling water cools the recycle exhaust gas while cooling the easy R valve 110.

좀 더 상세하게는, 상기 이지알라인(205)과 상기 냉각수라인(300)이 설정된 길이만큼 서로 인접하게 배치됨으로써 재순환배기가스를 효율적으로 냉각시킨다.In more detail, the easy line 205 and the cooling water line 300 are disposed to be adjacent to each other by a predetermined length to efficiently cool the recycle exhaust gas.

도 3에 도시한 바와 같이, 상기 이지알라인(205) 주위로 여러 개의 냉각수 라인이 배치됨으로써 재순환배기가스를 효율적으로 미리 냉각시키고, 상기 이지알쿨러(120)를 이용하여 재순환배기가스의 냉각 효율을 더욱 향상시킬 수 있다.As illustrated in FIG. 3, a plurality of cooling water lines are disposed around the easy line 205 to efficiently cool the recycle exhaust gas in advance, and use the easy cooler 120 to cool down the recycle exhaust gas. Can be further improved.

본 발명의 실시예에서, 상기 써모스탯(115)과 상기 이지알밸브(110)가 설치되는 일체형 바디(305) 내부에, 상기 이지알라인(205)과 상기 냉각수라인(300)을 서로 평행하게 인접하게 형성시키고, 냉각수의 흐름방향과 재순환배기가스의 흐름방향으로 반대로 함으로써 냉각효율을 더욱 향상시킬 수 있다.In the exemplary embodiment of the present invention, the easy line 205 and the coolant line 300 are parallel to each other in the integrated body 305 in which the thermostat 115 and the easy valve 110 are installed. The cooling efficiency can be further improved by reversing the flow direction of the cooling water and the flow direction of the recirculated exhaust gas.

또한, 일체로 형성된 하나의 상기 바디(305) 내부에 상기 이지알라인(205)과 상기 냉각수라인(300)이 일정한 두께의 한 격벽을 두고 형성됨으로써, 상기 이지알라인(205)을 지나는 재순환배기가스를 효율적으로 냉각시키는 것이 바람직하다.In addition, the easy line 205 and the cooling water line 300 is formed in one body 305 integrally formed with a partition wall of a constant thickness, recirculation exhaust through the easy line 205 It is desirable to cool the gas efficiently.

아울러, 일체형 상기 바디(305)에서 상기 이지알라인(205)과 상기 냉각수라인(300)이 서로 인접한 부분에서, 냉각수의 흐름방향과 재순환배기가스의 흐름방향을 반대로 흐르도록 하여 재순환배기가스의 냉각효율을 향상시키는 것이 바람직하다.In addition, in the integral body 305, the flow direction of the cooling water and the flow direction of the recirculated exhaust gas flow in the opposite direction between the azimuthal line 205 and the cooling water line 300 so as to cool the recirculated exhaust gas It is desirable to improve the efficiency.

이상으로 본 발명에 관한 바람직한 실시예를 설명하였으나, 본 발명은 상기 실시예에 한정되지 아니하며, 본 발명의 실시예로부터 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의한 용이하게 변경되어 균등하다고 인정되는 범위의 모든 변경을 포함한다. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

도 1은 본 발명의 실시예에 따른 배기가스 재순환 시스템에 대한 개략적인 구성도이다.1 is a schematic diagram of an exhaust gas recirculation system according to an exemplary embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 배기가스 재순환 시스템을 구비한 엔진 시스템의 사시도이다.2 is a perspective view of an engine system having an exhaust gas recirculation system according to an embodiment of the present invention.

도 3은 본 발명의 실시예에 따른 배기가스 재순환 시스템에서 냉각수와 재순환배기가스의 흐름을 개략적으로 도시한 구성도이다.3 is a schematic view showing the flow of cooling water and recirculated exhaust gas in the exhaust gas recirculation system according to the embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100: 배기매니폴드100: exhaust manifold

105: 실린더헤드105: cylinder head

110: 이지알밸브110: easy valve

115: 써모스탯115: thermostat

120: 이지알쿨러120: Easy R Cooler

130: 흡기매니폴드130: intake manifold

135: 바이패스밸브135: bypass valve

205: 이지알라인205: easyalline

300: 냉각수라인300: cooling water line

305: (일체형) 바디305: (integrated) body

Claims (7)

연소실로 공급되는 공기가 흐르는 흡기매니폴드와 상기 연소실에서 연소된 배기가스가 흐르는 배기매니폴드;An intake manifold through which the air supplied to the combustion chamber flows and an exhaust manifold through which the exhaust gas burned in the combustion chamber flows; 상기 배기매니폴드에서 상기 흡기매니폴드로 배기가스를 재순환시키는 이지알라인에 설치되어 재순환되는 배기가스의 흐름양을 조절하는 이지알밸브;An easy valve installed in an easy line recirculating exhaust gas from the exhaust manifold to the intake manifold to adjust an amount of recycled exhaust gas; 상기 이지알밸브 후단부에 설치되어 재순환되는 배기가스를 냉각시키는 이지알쿨러 전단부와 상기 이지알쿨러의 후단부를 연결하는 바이패스라인; 및A bypass line installed at the rear end of the easy valve and connecting the front end of the easy R cooler to cool the exhaust gas recycled to the rear end of the easy R cooler; And 상기 바이패스라인에 설치되어 재순환배기가스의 온도가 설정온도보다 낮은 경우 열리고, 높은 경우 닫히는 바이패스밸브를 포함하는 배기가스 재순환 시스템.And a bypass valve installed in the bypass line to open when the temperature of the recycle exhaust gas is lower than the set temperature and close when the recycle exhaust gas is higher than the set temperature. 제1 항에 있어서,According to claim 1, 재순환배기가스는 상기 이지알밸브, 상기 이지알쿨러를 순차적으로 지나서 상기 흡기매니폴드로 공급되는 것을 특징으로 하는 배기가스 재순환 시스템.Recirculation exhaust gas is exhaust gas recirculation system characterized in that supplied to the intake manifold sequentially pass through the easy R valve, the easy cooler. 제1 항에 있어서,According to claim 1, 라디에이터에서 워터펌프로 냉각수라인이 설치되고, 상기 냉각수라인의 전단부에 설치된 써모스탯을 더 포함하며,Further comprising a thermostat provided with a cooling water line from a radiator to a water pump and disposed at a front end of the cooling water line, 상기 써모스탯을 지난 냉각수는 상기 이지알밸브를 냉각시킴으로써 상기 재순환배기가스를 냉각시키는 것을 특징으로 하는 배기가스 재순환 시스템.The cooling water passing through the thermostat cools the recirculation exhaust gas by cooling the easy valve. 제3 항에 있어서,The method of claim 3, 상기 이지알밸브의 전단부에 배치된 상기 이지알라인은 상기 냉각수라인과 설정된 길이가 인접하게 또는 평행하게 배치되어 상기 이지알라인를 지나는 재순환배기가스를 냉각시키는 것을 특징으로 하는 배기가스 재순환 시스템.Wherein the all-in-line disposed at the front end of the easy valve is arranged adjacent to or parallel to the cooling water line so as to cool the recirculated exhaust gas passing through the all-in-one. 제4 항에 있어서,5. The method of claim 4, 상기 이지알밸브와 상기 써모스탯이 설치되는 하나의 일체형 바디 내부에 상기 이지알라인과 상기 냉각수라인이 일정한 두께의 한 격벽을 두고 형성됨으로써, 상기 이지알라인을 지나는 재순환배기가스를 냉각시키는 것을 특징으로 하는 배기가스 재순환 시스템.The islands and the cooling water line are formed with one partition wall having a certain thickness inside the one-piece body in which the easy valve and the thermostat are installed, thereby cooling the recirculated exhaust gas passing through the all- Exhaust gas recirculation system. 제5 항에 있어서,6. The method of claim 5, 일체형 상기 바디에서 상기 이지알라인과 상기 냉각수라인이 서로 인접한 부분에서, 냉각수의 흐름방향과 재순환배기가스의 흐름방향을 반대로 흐르도록 하는 것을 특징으로 하는 배기가스 재순환 시스템.Exhaust gas recirculation system characterized in that the flow direction of the coolant and the flow direction of the recirculation exhaust gas flows in the integral portion of the body in the portion adjacent to the easy line and the cooling water line. 제5 항에 있어서,6. The method of claim 5, 상기 이지알라인은,The easy line, 상기 바이패스밸브가 설치된 매인라인;A main line in which the bypass valve is installed; 상기 바이패스밸브 전단부의 상기 매인라인에서 분기되어 재순환배기가스가 일방향으로 흐르는 제1라인; 및 A first line branched from the every in-line of the front end of the bypass valve to flow recirculated exhaust gas in one direction; And 상기 바이패스밸브 후단부 상기 매인라인에서 분기되어 상기 제1라인과는 평행하게 배치되고, 상기 일방향과는 반대방향으로 배기가스가 흐르는 제2라인을 포함하고, A second line branched from the main line at the rear end of the bypass valve and disposed in parallel to the first line, and having exhaust gas flowing in a direction opposite to the one direction; 상기 제1라인과 상기 제2라인 사이에 상기 이지알쿨러가 배치되는 배기가스 재순환 시스템.And an EZ cooler disposed between the first line and the second line.
KR1020090035052A 2009-04-22 2009-04-22 Exhaust gas recirculation system KR20100116376A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101360445B1 (en) * 2012-12-17 2014-02-12 현대자동차주식회사 Egr system control method for engine
WO2016182286A1 (en) * 2015-05-08 2016-11-17 두산인프라코어 주식회사 Engine including control unit for regulating opening degree of egr valve, and method for controlling egr valve of engine
US10006415B2 (en) 2015-07-30 2018-06-26 Hyundai Motor Company Auxiliary cooling system
US11815052B2 (en) 2021-12-08 2023-11-14 Hyundai Motor Company EGR cooler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101360445B1 (en) * 2012-12-17 2014-02-12 현대자동차주식회사 Egr system control method for engine
WO2016182286A1 (en) * 2015-05-08 2016-11-17 두산인프라코어 주식회사 Engine including control unit for regulating opening degree of egr valve, and method for controlling egr valve of engine
US10302032B2 (en) 2015-05-08 2019-05-28 Doosan Infracore Co., Ltd. Engine including control unit for regulating opening degree of EGR valve, and method for controlling EGR valve of engine
US10006415B2 (en) 2015-07-30 2018-06-26 Hyundai Motor Company Auxiliary cooling system
US11815052B2 (en) 2021-12-08 2023-11-14 Hyundai Motor Company EGR cooler

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