JP7095234B2 - Exhaust gas recirculation device - Google Patents

Exhaust gas recirculation device Download PDF

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JP7095234B2
JP7095234B2 JP2017122357A JP2017122357A JP7095234B2 JP 7095234 B2 JP7095234 B2 JP 7095234B2 JP 2017122357 A JP2017122357 A JP 2017122357A JP 2017122357 A JP2017122357 A JP 2017122357A JP 7095234 B2 JP7095234 B2 JP 7095234B2
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egr
condensed water
exhaust gas
bracket
passage
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JP2019007388A (en
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崇 菅原
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Isuzu Motors Ltd
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Isuzu Motors Ltd
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Priority to JP2017122357A priority Critical patent/JP7095234B2/en
Priority to CN201880039239.6A priority patent/CN110741153B/en
Priority to PCT/JP2018/022914 priority patent/WO2018235736A1/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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • 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
    • 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
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • 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
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
    • 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
    • F02M26/74—Protection from damage, e.g. shielding means

Description

本発明は、ＥＧＲ（Exhaust Gas Recirculation）クーラー及びＥＧＲバルブを有する排ガス再循環装置に関する。 The present invention relates to an exhaust gas recirculation device having an EGR (Exhaust Gas Recirculation) cooler and an EGR valve.

エンジンの排ガス中のＮＯｘを低減するために、エンジンに排ガスを再循環する排ガス再循環装置（以下「ＥＧＲ装置」と呼ぶことがある）が広く使用されている。ＥＧＲ装置は、例えば特許文献１等に記載されている。 In order to reduce NOx in the exhaust gas of an engine, an exhaust gas recirculation device (hereinafter sometimes referred to as "EGR device") that recirculates the exhaust gas to the engine is widely used. The EGR device is described in, for example, Patent Document 1 and the like.

ＥＧＲ装置は、エンジンの排ガスの一部を、ＥＧＲ通路（つまりＥＧＲパイプ）を通してエンジンの吸気側へ還流する。ＥＧＲ通路には、ＥＧＲクーラー及びＥＧＲバルブが設けられている。ＥＧＲクーラーによって冷却された排ガスは、ＥＧＲバルブによって流量が調節されてエンジンの吸気口へと還流される。 The EGR device recirculates a part of the exhaust gas of the engine to the intake side of the engine through the EGR passage (that is, the EGR pipe). The EGR passage is provided with an EGR cooler and an EGR valve. The exhaust gas cooled by the EGR cooler is returned to the intake port of the engine by adjusting the flow rate by the EGR valve.

特開平０７－２４３３５４号公報Japanese Unexamined Patent Publication No. 07-2433354

ところで、排ガスがＥＧＲクーラーによって冷却されると、煤混じり凝縮水が発生する。この凝縮水がＥＲＧバルブを駆動するためのモーターなどに達すると、モーターに悪影響を及ぼすおそれがあるため、従来、凝縮水を外部に排出するための通水孔をＥＧＲバルブに設けるなどの対策が取られている。 By the way, when the exhaust gas is cooled by the EGR cooler, condensed water mixed with soot is generated. If this condensed water reaches the motor for driving the ERG valve, it may adversely affect the motor. Therefore, conventional measures such as providing a water passage hole for discharging the condensed water to the outside are provided in the EGR valve. It has been taken.

しかしながら、ＥＧＲバルブの下方にはエンジンやパイプなどが配置されており、この通水孔から排出される煤混じりの凝縮水によってエンジンやパイプなどが黒く汚れると見栄えが悪くなり、これが商品性の悪化に繋がるおそれがある。 However, the engine, pipes, etc. are arranged below the EGR valve, and if the engine, pipes, etc. become black and dirty due to the condensed water mixed with soot discharged from this water passage hole, the appearance deteriorates, which deteriorates the commercial value. May lead to.

本発明は、以上の点を考慮してなされたものであり、煤混じりの凝縮水による汚れを簡易な構成により防止できる排ガス再循環装置を提供する。 The present invention has been made in consideration of the above points, and provides an exhaust gas recirculation device capable of preventing contamination due to condensed water mixed with soot by a simple configuration.

本発明の排ガス再循環装置の一つの態様は、
エンジンの排ガスの一部を、ＥＧＲ通路を通して前記エンジンの吸気側へ還流する排ガス再循環装置であって、
前記ＥＧＲ通路に設けられたＥＧＲクーラーと、
前記ＥＧＲ通路に設けられ、前記ＥＧＲクーラーによって冷却された排ガスの流量を調節するＥＧＲバルブと、
前記ＥＧＲバルブに設けられ、前記ＥＧＲ通路内で発生した凝縮水を外部に排出する通水孔と、
前記通水孔の下方に設けられ、前記通水孔から排出された前記凝縮水を捕集する凝縮水捕集部と、
を具備する。 One aspect of the exhaust gas recirculation device of the present invention is
An exhaust gas recirculation device that returns a part of the exhaust gas of the engine to the intake side of the engine through the EGR passage.
The EGR cooler provided in the EGR passage and
An EGR valve provided in the EGR passage and controlling the flow rate of the exhaust gas cooled by the EGR cooler,
A water passage hole provided in the EGR valve to discharge the condensed water generated in the EGR passage to the outside,
A condensed water collecting unit provided below the water passage hole and collecting the condensed water discharged from the water passage hole, and a condensed water collecting unit.
Equipped with.

本発明によれば、通水孔から滴下する凝縮水が凝縮水捕集部によって捕集されるので、簡易な構成により、煤混じりの凝縮水によるエンジンやパイプなどが汚れることを防止できるようになる。 According to the present invention, the condensed water dripping from the water passage hole is collected by the condensed water collecting unit, so that the simple configuration can prevent the engine, pipe, etc. from being contaminated by the condensed water mixed with soot. Become.

実施の形態の全体構成を示す概略図Schematic diagram showing the overall configuration of the embodiment ＥＧＲバルブの構成を示す略線的断面図Schematic cross-sectional view showing the configuration of the EGR valve 実施の形態による凝縮水捕集部の説明に供する側面図Side view to be used for explanation of the condensed water collecting part according to the embodiment 凝縮水捕集部での凝縮水の流れを示す側面図Side view showing the flow of condensed water in the condensed water collecting part

以下、本発明の実施の形態を、図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

本実施の形態では、直列四気筒のディーゼルエンジンを例に説明するが、本発明はディーゼルエンジンに限定されずに、ガソリンエンジンにも適用することができ、その気筒数や、気筒の配列も限定されない。なお、図面に関しては、構成が分かり易いように寸法を変化させており、各部材、各部品の板厚や幅や長さなどの比率も必ずしも実際に製造するものの比率とは一致させていない。 In the present embodiment, an in-line four-cylinder diesel engine will be described as an example, but the present invention is not limited to the diesel engine, but can be applied to a gasoline engine, and the number of cylinders and the arrangement of cylinders are also limited. Not done. Regarding the drawings, the dimensions are changed so that the configuration is easy to understand, and the ratios of the plate thickness, width, length, etc. of each member and each part do not necessarily match the ratios of those actually manufactured.

図１は、実施の形態の全体構成を示す概略図である。図１に示すように、エンジン（内燃機関）１は、エンジン本体２、排気通路Ｅｘ、吸気通路Ｉｎ、及びＥＧＲ（排ガス再循環）通路Ｅｇを備え、さらに、エキゾーストマニホールド３、インレットマニホールド４、可変タービン５ａとコンプレッサ５ｂからなるターボチャージャー５、エアクリーナー６、インタークーラー７、吸気スロットル８、インテークダクト８ａ、ＤＯＣ（ディーゼル酸化触媒）９ａとＤＰＦ（捕集装置）９ｂからなる後処理装置９、及びＥＧＲ装置１０を備える。 FIG. 1 is a schematic view showing an overall configuration of an embodiment. As shown in FIG. 1, the engine (internal combustion engine) 1 includes an engine body 2, an exhaust passage Ex, an intake passage In, and an EGR (exhaust gas recirculation) passage Eg, and further includes an exhaust manifold 3, an inlet manifold 4, and a variable. A turbocharger 5 consisting of a turbine 5a and a compressor 5b, an air cleaner 6, an intercooler 7, an intake throttle 8, an intake duct 8a, an aftertreatment device 9 consisting of a DOC (diesel oxidation catalyst) 9a and a DPF (collecting device) 9b, and an EGR. The device 10 is provided.

ＥＧＲ装置１０は、ＥＧＲクーラー１１と、ＥＧＲバルブ（ＥＧＲバルブユニットと言ってもよい）１２と、リードバルブ（逆止弁と言ってもよい）１３を備える。ＥＧＲクーラー１１とＥＧＲバルブ１２とはＥＧＲダクト１４によって接続されている。 The EGR device 10 includes an EGR cooler 11, an EGR valve (which may be called an EGR valve unit) 12, and a reed valve (which may be called a check valve) 13. The EGR cooler 11 and the EGR valve 12 are connected by an EGR duct 14.

エンジン１は、ターボチャージャー５の排ガス上流側からＥＧＲガスを還流させる、所謂高圧式のＥＧＲシステムを備えているため、ＥＧＲバルブ１２の出入口の差圧が小さくなり、運転状態によっては負圧となる。そこで、ＥＧＲ通路Ｅｇ内にリードバルブ１３を設け、ＥＧＲガスの逆流を防ぐとともに、シリンダ吸排気行程の脈動により生じる周期的な差圧変動を利用してＥＧＲガスを汲み出すことができるようになっている。 Since the engine 1 is provided with a so-called high-pressure EGR system that recirculates EGR gas from the upstream side of the exhaust gas of the turbocharger 5, the differential pressure at the inlet and outlet of the EGR valve 12 becomes small and becomes negative pressure depending on the operating condition. .. Therefore, a reed valve 13 is provided in the EGR passage Eg to prevent the backflow of the EGR gas, and the EGR gas can be pumped out by utilizing the periodic differential pressure fluctuation caused by the pulsation of the cylinder intake / exhaust stroke. ing.

図２は、ＥＧＲバルブ１２の構成を示す略線的断面図である。ＥＧＲバルブ１２は、ケース１２ａと、バタフライバルブからなるバルブ本体１２ｂと、バルブ本体１２ｂを駆動する駆動軸１２ｃと、ギヤ１２ｄと、モーター１２ｅと、を有する。モーター１２ｅの駆動力がギヤ１２ｄ及び駆動軸１２ｃを介してバルブ本体１２ｂに伝達されることにより、バルブ本体１２ｄが駆動され、この結果、ＥＧＲ通路Ｅｇからエンジン１に還流される排ガスの流量が調節される。 FIG. 2 is a schematic cross-sectional view showing the configuration of the EGR valve 12. The EGR valve 12 includes a case 12a, a valve body 12b including a butterfly valve, a drive shaft 12c for driving the valve body 12b, a gear 12d, and a motor 12e. The driving force of the motor 12e is transmitted to the valve body 12b via the gear 12d and the drive shaft 12c to drive the valve body 12d, and as a result, the flow rate of the exhaust gas recirculated from the EGR passage Eg to the engine 1 is adjusted. Will be done.

モーター１２ｅ、ギヤ１２ｄ及び駆動軸１２ｃなどはケース１２ａ内に収容されている。ここで、駆動軸１２ｃとパイプ（ＥＧＲ通路Ｅｇ）との間はシール剤などによってシールされているが、このシール剤の隙間などからＥＧＲクーラー１１の冷却により生じた凝縮水が漏れることがある。漏れ出た凝縮水は、ケース１２ａの底面に溜まることになる。ケース１２ａ内に溜まった凝縮水がモーター１２ｅに悪影響を及ぼさないように、ケース１２ａの下面には通水孔１２ｆが形成されており、凝縮水は通水孔１２ｆからケース１２ａの外部に排出される。 The motor 12e, the gear 12d, the drive shaft 12c, and the like are housed in the case 12a. Here, the drive shaft 12c and the pipe (EGR passage Eg) are sealed with a sealant or the like, but condensed water generated by cooling the EGR cooler 11 may leak from the gaps of the sealant or the like. The leaked condensed water will collect on the bottom surface of the case 12a. A water passage hole 12f is formed on the lower surface of the case 12a so that the condensed water collected in the case 12a does not adversely affect the motor 12e, and the condensed water is discharged from the water passage hole 12f to the outside of the case 12a. To.

本実施の形態においては、図３に示すように、通水孔１２ｆの下方に、凝縮水捕集部としてのブラケット２０が設けられている。ブラケット２０は、断面が略Ｌ字状の部材であり、ＥＧＲバルブ１２の下方にボルト３０によって固定されている。ボルト３０は、ＥＧＲ通路ＥｇにＥＧＲバルブ１２を固定するためのボルトであり、本実施の形態ではこのボルト３０を兼用して、ブラケット２０を固定するようになっている。これにより、ブラケット２０を固定するための部品点数を増やさずにすむ。 In the present embodiment, as shown in FIG. 3, a bracket 20 as a condensed water collecting portion is provided below the water passage hole 12f. The bracket 20 is a member having a substantially L-shaped cross section, and is fixed to the lower part of the EGR valve 12 by a bolt 30. The bolt 30 is a bolt for fixing the EGR valve 12 to the EGR passage Eg, and in the present embodiment, the bolt 30 is also used to fix the bracket 20. As a result, it is not necessary to increase the number of parts for fixing the bracket 20.

ブラケット２０は、水平に対して傾斜を持たせて取り付けられている。具体的には、ブラケット２０の両端２０ａ、２０ｂのうち、一端２０ａは通水孔１２ｆから落下する凝縮水を受けとめることができる位置に配置され、他端２０ｂは上記一端２０ａよりも低い位置に配置されている。また、ブラケット２０の下方側の一端２０ｂは板状の閉塞部材２０ｅによって閉塞されている。 The bracket 20 is attached so as to be inclined with respect to the horizontal. Specifically, of the ends 20a and 20b of the bracket 20, one end 20a is arranged at a position where the condensed water falling from the water passage hole 12f can be received, and the other end 20b is arranged at a position lower than the one end 20a. Has been done. Further, one end 20b on the lower side of the bracket 20 is closed by a plate-shaped closing member 20e.

また、ブラケット２０は、１枚の金属板がＬ字状に折り曲げられ、その結果、側板２０ｃ、底板２０ｄ、及び、側板２０ｃと底板２０ｄの間の角部を有する。ブラケット２０は、底板２０ｄの端から凝縮水が漏れずに角部を伝わるように底板２０ｄの一端が若干上を向くように取り付けられている。これにより、ブラケット２０の一端２０ａに滴下した凝縮水は、ブラケット２０の角部を伝って流れ、ブラケット２０の他端２０ｂ側に溜まるようになっている。 Further, the bracket 20 has one metal plate bent into an L shape, and as a result, has a side plate 20c, a bottom plate 20d, and a corner portion between the side plate 20c and the bottom plate 20d. The bracket 20 is attached so that one end of the bottom plate 20d faces slightly upward so that condensed water does not leak from the end of the bottom plate 20d and travels through the corners. As a result, the condensed water dropped on one end 20a of the bracket 20 flows along the corner portion of the bracket 20 and collects on the other end 20b side of the bracket 20.

また、ブラケット２０は、黒色に塗られている。 Further, the bracket 20 is painted black.

以上の構成において、ＥＧＲクーラー１１の冷却により生じた煤混じりの凝縮水の一部は、通水孔１２ｆから滴下するが、この煤混じりの凝縮水はブラケット２０によって捕集されることにより、ＥＧＲバルブ１２の下方に配置されているエンジンやパイプ類などの部品には付着しない。これにより、ＥＧＲバルブ１２の下方に配置されているエンジンやパイプ類などの部品が、煤混じりの凝縮水によって汚れることを防止できる。 In the above configuration, a part of the condensed water mixed with soot generated by cooling the EGR cooler 11 is dropped from the water passage hole 12f, and the condensed water mixed with soot is collected by the bracket 20 to be EGR. It does not adhere to parts such as the engine and pipes arranged below the valve 12. This makes it possible to prevent parts such as the engine and pipes arranged below the EGR valve 12 from being contaminated by the condensed water mixed with soot.

ここで、ブラケット２０の一端２０ａ側に滴下した煤混じりの凝縮水は、図４の矢印Ｆで示したように、ブラケット２０の角部を伝って、傾斜したブラケット２０の上方側の一端２０ａから下方側の一端２０ｂへと流れ、ブラケット２０の下方側の一端２０ｂに溜まる。この煤混じりの凝縮水は、時間の経過とともに水分が蒸発し、ブラケット２０上には煤だけが残る。ブラケット２０は、黒色で塗装されているので、ブラケット２０の煤による汚れも目立たない。 Here, the condensed water mixed with soot dropped on the one end 20a side of the bracket 20 travels along the corner portion of the bracket 20 and from the upper end 20a of the inclined bracket 20 as shown by the arrow F in FIG. It flows to one end 20b on the lower side and collects on one end 20b on the lower side of the bracket 20. The condensed water mixed with soot evaporates with the passage of time, and only soot remains on the bracket 20. Since the bracket 20 is painted in black, dirt due to soot on the bracket 20 is not noticeable.

以上説明したように、本実施の形態によれば、ＥＧＲバルブ１２の下方にブラケット２０を設け、ＥＧＲバルブ１２の通水孔１２ｆから滴下した煤混じりの凝縮水をブラケット２０によって捕集したことにより、煤混じりの凝縮水によるエンジンやパイプなどの汚れを簡易な構成により防止できるようになる。 As described above, according to the present embodiment, the bracket 20 is provided below the EGR valve 12, and the condensed water mixed with soot dropped from the water passage hole 12f of the EGR valve 12 is collected by the bracket 20. A simple configuration can prevent the engine and pipes from getting dirty due to condensed water mixed with soot.

上述の実施の形態は、本発明を実施するにあたっての具体化の一例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならないものである。すなわち、本発明はその要旨、またはその主要な特徴から逸脱することの無い範囲で、様々な形で実施することができる。 The above-described embodiment is merely an example of the embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

上述の実施の形態では、通水孔１２ｆから排出された凝縮水を捕集する凝縮水捕集部としてブラケット２０を設けた場合について述べたが、本発明はこれに限らず、凝縮水捕集部としては、例えばスポンジや布を用いてもよい。つまり、通水孔１２ｆの下方にスポンジや布を配置するようにしてもよい。ただし、凝縮水捕集部が配置される位置は、高温になることも想定されるので、実施の形態のようにブラケット２０を用いることがより好適である。 In the above-described embodiment, the case where the bracket 20 is provided as the condensed water collecting portion for collecting the condensed water discharged from the water passage hole 12f has been described, but the present invention is not limited to this, and the condensed water collecting is not limited to this. As the part, for example, a sponge or a cloth may be used. That is, a sponge or a cloth may be arranged below the water passage hole 12f. However, since it is assumed that the position where the condensed water collecting portion is arranged becomes high temperature, it is more preferable to use the bracket 20 as in the embodiment.

また、上述の実施の形態では、断面がＬ字状のブラケット２０を用いたが、ブラケットの形状はこれに限らず、要は凝縮水を捕集して一時的に貯留できるような形状であればよい。 Further, in the above-described embodiment, the bracket 20 having an L-shaped cross section is used, but the shape of the bracket is not limited to this, and the point is that the shape may be such that condensed water can be collected and temporarily stored. Just do it.

本発明は、排ガス再循環装置に広く適用可能である。 The present invention is widely applicable to an exhaust gas recirculation device.

１ エンジン
２ エンジン本体
１０ ＥＧＲ（排ガス再循環）装置
１１ ＥＧＲクーラー
１２ ＥＧＲバルブ
１２ａ ケース
１２ｂ バルブ本体
１２ｃ 駆動軸
１２ｄ ギヤ
１２ｅ モーター
１２ｆ 通水孔
２０ ブラケット
２０ｃ 側板
２０ｄ 底板
２０ｅ 閉塞部材
Ｅｇ ＥＧＲ（排ガス再循環）通路
Ｅｘ 排気通路
Ｉｎ 吸気通路 1 Engine 2 Engine body 10 EGR (exhaust gas recirculation) device 11 EGR cooler 12 EGR valve 12a Case 12b Valve body 12c Drive shaft 12d Gear 12e Motor 12f Water flow hole 20 Bracket 20c Side plate 20d Bottom plate 20e Closure member Eg EGR (Exhaust gas recirculation) ) Passage Ex Exhaust Passage In Intake Passage

Claims (3)

エンジンの排ガスの一部を、ＥＧＲ通路を通して前記エンジンの吸気側へ還流する排ガス再循環装置であって、
前記ＥＧＲ通路に設けられたＥＧＲクーラーと、
前記ＥＧＲ通路に設けられ、前記ＥＧＲクーラーによって冷却された排ガスの流量を調節するＥＧＲバルブと、
前記ＥＧＲバルブに設けられ、前記ＥＧＲ通路内で発生した凝縮水を外部に排出する通水孔と、
前記通水孔の下方に設けられ、前記通水孔から排出された前記凝縮水を捕集して外気にさらした状態で貯留する凝縮水捕集部と、
を具備し、
前記凝縮水捕集部は、ブラケット、スポンジ又は布である、
排ガス再循環装置。 An exhaust gas recirculation device that returns a part of the exhaust gas of the engine to the intake side of the engine through the EGR passage.
The EGR cooler provided in the EGR passage and
An EGR valve provided in the EGR passage and controlling the flow rate of the exhaust gas cooled by the EGR cooler,
A water passage hole provided in the EGR valve to discharge the condensed water generated in the EGR passage to the outside,
A condensed water collecting unit provided below the water passage hole, which collects the condensed water discharged from the water passage hole and stores the condensed water in a state of being exposed to the outside air.
Equipped with
The condensed water collecting portion is a bracket, a sponge or a cloth.
Exhaust gas recirculation device. エンジンの排ガスの一部を、ＥＧＲ通路を通して前記エンジンの吸気側へ還流する排ガス再循環装置であって、An exhaust gas recirculation device that returns a part of the exhaust gas of the engine to the intake side of the engine through the EGR passage.
前記ＥＧＲ通路に設けられたＥＧＲクーラーと、The EGR cooler provided in the EGR passage and
前記ＥＧＲ通路に設けられ、前記ＥＧＲクーラーによって冷却された排ガスの流量を調節するＥＧＲバルブと、An EGR valve provided in the EGR passage and controlling the flow rate of the exhaust gas cooled by the EGR cooler,
前記ＥＧＲバルブに設けられ、前記ＥＧＲ通路内で発生した凝縮水を外部に排出する通水孔と、A water passage hole provided in the EGR valve to discharge the condensed water generated in the EGR passage to the outside,
前記通水孔の下方に設けられ、前記通水孔から排出された前記凝縮水を捕集して外気にさらした状態で貯留する凝縮水捕集部と、A condensed water collecting unit provided below the water passage hole, which collects the condensed water discharged from the water passage hole and stores the condensed water in a state of being exposed to the outside air.
を具備し、Equipped with
前記凝縮水捕集部は、前記通水孔の下方に設けられたブラケットであり、The condensed water collecting portion is a bracket provided below the water passage hole.
前記ブラケットは、断面Ｌ字状であり、角部が下を向いている、The bracket has an L-shaped cross section, and the corners face downward.
再循環装置。Recirculation device. 前記ブラケットは、
水平に対して傾斜を持たせて取り付けられており、下方側の一端は前記凝縮水が溜まるように閉塞されている、
請求項２に記載の排ガス再循環装置。 The bracket is
It is attached with an inclination with respect to the horizontal, and one end on the lower side is closed so that the condensed water collects.
The exhaust gas recirculation device according to claim 2 .
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