JP6132093B2 - Engine exhaust system - Google Patents

Engine exhaust system Download PDF

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JP6132093B2
JP6132093B2 JP2013142282A JP2013142282A JP6132093B2 JP 6132093 B2 JP6132093 B2 JP 6132093B2 JP 2013142282 A JP2013142282 A JP 2013142282A JP 2013142282 A JP2013142282 A JP 2013142282A JP 6132093 B2 JP6132093 B2 JP 6132093B2
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exhaust
sensor
egr
pipe
passage
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JP2015014264A (en
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尊一 宮崎
尊一 宮崎
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Suzuki Motor Co Ltd
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Suzuki Motor Co Ltd
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Priority to JP2013142282A priority Critical patent/JP6132093B2/en
Priority to IN1794DE2014 priority patent/IN2014DE01794A/en
Priority to DE102014009870.2A priority patent/DE102014009870A1/en
Priority to CN201410318247.8A priority patent/CN104279037B/en
Publication of JP2015014264A publication Critical patent/JP2015014264A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor

Description

この発明は、エンジンの排気装置に係り、特に排気管に取り付けられた排気センサを保護するエンジンの排気装置に関する。   The present invention relates to an engine exhaust device, and more particularly to an engine exhaust device for protecting an exhaust sensor attached to an exhaust pipe.

車両に搭載されたエンジンの排気装置においては、排気通路を有する排気管と、排気管にセンサボスを介して取付けられてセンサ部が排気通路内に突出する排気センサと、センサ部と隣接する位置にて排気通路内に開口するＥＧＲガス採取口と、ＥＧＲガス採取口から排気ガスの一部を取り出して吸気通路に再循環するＥＧＲ通路を有するＥＧＲ配管とを備えた構造のものがある。
また、このようなエンジンの排気装置としては、以下の先行技術文献がある。 In an exhaust system for an engine mounted on a vehicle, an exhaust pipe having an exhaust passage, an exhaust sensor attached to the exhaust pipe via a sensor boss and a sensor portion protruding into the exhaust passage, and a position adjacent to the sensor portion. There is a structure provided with an EGR gas sampling port that opens into the exhaust passage and an EGR pipe having an EGR passage that extracts a part of the exhaust gas from the EGR gas sampling port and recirculates it to the intake passage.
Further, there are the following prior art documents as exhaust devices for such an engine.

特開２０１１−１９６２１１号公報JP 2011-196211 A

特許文献１に係る内燃機関の排気装置は、排気浄化ユニットに接続される排気管内に内側管を設け、この内側管の排気下流側の端部を排気管の管壁に接続し、内側管と排気管との間には環状空間を形成することで、排気センサの排気性状を精度良く検出するものである。   An exhaust apparatus for an internal combustion engine according to Patent Document 1 includes an inner pipe in an exhaust pipe connected to an exhaust purification unit, and an exhaust pipe downstream end of the inner pipe is connected to a pipe wall of the exhaust pipe. By forming an annular space between the exhaust pipe and the exhaust pipe, the exhaust property of the exhaust sensor is detected with high accuracy.

ところが、従来、ＥＧＲガスの一部を採取する構造を備えた排気マニホールドにおいて、ＥＧＲ配管内で排気ガスが冷却されることによって発生した凝縮水が飛散しやすい箇所に排気センサを設置せざるを得ない場合に、凝縮水の飛沫が排気センサの導入孔からセンサ部（センサ素子）へ浸入し、センサ部を破壊してしまい、適切な排出ガス制御ができなくなるおそれがあり、改善が望まれていた。   However, conventionally, in an exhaust manifold having a structure for collecting a part of EGR gas, an exhaust sensor must be installed at a location where the condensed water generated by cooling the exhaust gas in the EGR pipe is likely to scatter. If there is not, the splash of condensate may enter the sensor part (sensor element) from the exhaust sensor introduction hole and destroy the sensor part, which makes it impossible to control the exhaust gas properly. It was.

そこで、この発明は、排気管内の空間において、ＥＧＲ配管で生成された凝縮水が排気センサヘ被水することを防止し、排気センサの破損や検出精度の低下を防止することができるエンジンの排気装置を提供することを目的とする。   Accordingly, the present invention provides an engine exhaust device that prevents condensate water generated by the EGR pipe from getting wet on the exhaust sensor in the space inside the exhaust pipe, and prevents the exhaust sensor from being damaged and the detection accuracy from being lowered. The purpose is to provide.

この発明は、排気通路を有する排気管と、前記排気管にセンサボスを介して取付けられてセンサ部が前記排気通路内に突出する排気センサと、前記センサ部と隣接する位置にて前記排気通路内に開口するＥＧＲガス採取口と、前記ＥＧＲガス採取口から排気ガスの一部を取り出して吸気通路に再循環するＥＧＲ通路を有するＥＧＲ配管とを備えたエンジンの排気装置において、前記センサボスは、前記排気センサを挿着するための導入孔を有するボス本体と、前記ボス本体と一体的に形成されて前記センサ部の近傍に配置される遮蔽部材と、を有し、前記遮蔽部材は、前記ＥＧＲガス採取口を覆うように前記センサ部に対して前記ＥＧＲガス採取口側のみに設けられ、前記遮蔽部材の縦断面形状が前記排気管内を流れる排気ガスの流れに沿って延びるように、前記センサボスを前記排気管に取り付けたことを特徴とする。 The present invention includes an exhaust pipe having an exhaust passage, an exhaust sensor attached to the exhaust pipe via a sensor boss and having a sensor portion protruding into the exhaust passage, and a position adjacent to the sensor portion in the exhaust passage. In the exhaust system for an engine, the sensor boss includes the EGR gas sampling port that is open to the EGR pipe, and an EGR pipe having an EGR passage that extracts a part of the exhaust gas from the EGR gas sampling port and recirculates the exhaust gas to the intake passage. A boss main body having an introduction hole for inserting an exhaust sensor; and a shielding member formed integrally with the boss main body and disposed in the vicinity of the sensor portion, wherein the shielding member is the EGR Provided only on the EGR gas sampling port side with respect to the sensor unit so as to cover the gas sampling port, and the vertical cross-sectional shape of the shielding member follows the flow of the exhaust gas flowing in the exhaust pipe As extend, characterized in that attaching the sensor boss to the exhaust pipe.

この発明は、排気管内の空間において、ＥＧＲ配管で生成された凝縮水が排気センサヘ被水することを防止し、排気センサの破損や検出精度の低下を防止することができる。   According to the present invention, in the space in the exhaust pipe, the condensed water generated by the EGR pipe can be prevented from getting wet to the exhaust sensor, and the exhaust sensor can be prevented from being damaged and the detection accuracy being lowered.

図１はエンジンの斜視図である。（実施例）FIG. 1 is a perspective view of the engine. (Example) 図２は排気装置の正面図である。（実施例）FIG. 2 is a front view of the exhaust device. (Example) 図３は排気装置の側面図である。（実施例）FIG. 3 is a side view of the exhaust device. (Example) 図４は図２のＩＶ−ＩＶ線による断面図である。（実施例）4 is a cross-sectional view taken along line IV-IV in FIG. (Example) 図５は図３のＶ−Ｖ線による断面図である。（実施例）FIG. 5 is a cross-sectional view taken along line VV in FIG. (Example) 図６は図２のＶＩ−ＶＩ線による断面図である。（実施例）6 is a cross-sectional view taken along line VI-VI in FIG. (Example) 図７（Ａ）はセンサボスの正面図である。図７（Ｂ）はセンサボスの側面図である。図７（Ｃ）はセンサボスの背面図である。（実施例）FIG. 7A is a front view of the sensor boss. FIG. 7B is a side view of the sensor boss. FIG. 7C is a rear view of the sensor boss. (Example)

この発明は、排気管内の空間において、ＥＧＲ配管で生成された凝縮水が排気センサヘ被水することを防止し、排気センサの破損や検出精度の低下を防止する目的を、センサ部のＥＧＲガス採取口を覆う遮蔽部材を排気センサの近傍に配置して実現するものである。   The purpose of the present invention is to prevent the condensed water generated in the EGR pipe from getting wet on the exhaust sensor in the space in the exhaust pipe, and to prevent the exhaust sensor from being damaged and the detection accuracy from being lowered. A shielding member that covers the mouth is disposed in the vicinity of the exhaust sensor.

図１〜図７は、この発明の実施例を示すものである。
図１に示すように、車両には、多気筒用（例えば、４気筒）のエンジン１が搭載される。このエンジン１は、シリンダブロック２と、シリンダヘッド３と、シリンダヘッドカバー４と、オイルパン５とを備える。 1 to 7 show an embodiment of the present invention.
As shown in FIG. 1, a multi-cylinder (for example, four-cylinder) engine 1 is mounted on the vehicle. The engine 1 includes a cylinder block 2, a cylinder head 3, a cylinder head cover 4, and an oil pan 5.

エンジン１には、前側部に排気装置６が設置される。
この排気装置６は、図２、図３に示すように、シリンダヘッド３の前側部にマニホルド取付フランジ７を介して取り付けられる排気マニホルド８と、この排気マニホルド８に連設された触媒９と、この触媒９に連設されて排気通路１０を有する排気管１１とを備える。排気マニホルド８は、複数の排気分岐管１２を備える。触媒９は、排気マニホルド８から下方に向かって延設している。 The engine 1 is provided with an exhaust device 6 on the front side.
As shown in FIGS. 2 and 3, the exhaust device 6 includes an exhaust manifold 8 attached to the front side portion of the cylinder head 3 via a manifold attachment flange 7, a catalyst 9 connected to the exhaust manifold 8, and An exhaust pipe 11 connected to the catalyst 9 and having an exhaust passage 10 is provided. The exhaust manifold 8 includes a plurality of exhaust branch pipes 12. The catalyst 9 extends downward from the exhaust manifold 8.

また、エンジン１の前側には、ＥＧＲ装置１３が設置される。
このＥＧＲ装置１３は、図２、図３に示すように、排気管１１の排気ガスの一部を取り出して吸気通路に再循環するＥＧＲ通路１４を有するＥＧＲ配管１５と、このＥＧＲ配管１５の途中で且つ排気マニホルド８よりも内側でエンジン１の前側部に取り付けられたＥＧＲクーラ１６とを備える。
このＥＧＲクーラ１６は、ＥＧＲ配管１５に導入したＥＧＲガスを冷却するものであって、ＥＧＲ配管１５に連通するＥＧＲガスの排ガス流通路を備える。つまり、ＥＧＲクーラ１６では、内部の排ガス流通路を通過するＥＧＲガスを、この排ガス流通路の周辺で流れる冷却水によって冷却する。
このＥＧＲ装置１３において、図２、図３に示すように、排気管１１には、センサボス１７を介して排気センサ１８が取り付けられる。この場合、排気センサ１８は、排気通路１０に突出して配置されるセンサ部（センサ素子）１９を備え、また、センサケーブル２０を接続している。 Further, an EGR device 13 is installed on the front side of the engine 1.
As shown in FIGS. 2 and 3, the EGR device 13 includes an EGR pipe 15 having an EGR passage 14 that takes out a part of the exhaust gas from the exhaust pipe 11 and recirculates it to the intake passage, and an intermediate portion of the EGR pipe 15. And an EGR cooler 16 attached to the front side of the engine 1 inside the exhaust manifold 8.
The EGR cooler 16 cools the EGR gas introduced into the EGR pipe 15 and includes an exhaust gas flow passage for EGR gas communicating with the EGR pipe 15. That is, in the EGR cooler 16, the EGR gas that passes through the internal exhaust gas flow passage is cooled by the cooling water that flows around the exhaust gas flow passage.
In this EGR device 13, as shown in FIGS. 2 and 3, an exhaust sensor 18 is attached to the exhaust pipe 11 via a sensor boss 17. In this case, the exhaust sensor 18 includes a sensor unit (sensor element) 19 that protrudes from the exhaust passage 10 and is connected to a sensor cable 20.

また、排気管１１には、図４、図５に示すように、センサ部１９と隣接する位置にて排気通路１０に開口するＥＧＲガス採取口２１が形成されている。このＥＧＲガス採取口２１には、ＥＧＲ通路１４が連通するように、ＥＧＲ配管１５が取り付けられる。このＥＧＲ配管１５は、排気管１１のＥＧＲガス採取口２１に接続する接続管２２の排気管側接続フランジ２３に、配管側接続フランジ２４が結合することで、排気管１１に連結される。
ＥＧＲ配管１５は、図１に示すように、エンジン１の正面視で、接続管２２から車両右方へ水平に延びるとともに途中がシリンダブロック２側へ曲げられ且つ斜め上方に延びてＥＧＲクーラ１６に接続する第１ＥＧＲ配管１５Ａと、ＥＧＲクーラ１６からエンジン１の右側部位を上方に延びて後側部に配置された吸気通路に接続する第２ＥＧＲ配管１５Ｂとから構成される。
このような排気装置６において、通常、ＥＧＲ配管１５内を流れるＥＧＲガスがＥＧＲクーラ１６によって冷却される。そして、ＥＧＲガス中の水蒸気は、ＥＧＲクーラ１６で凝縮される。その後、ＥＧＲ配管１５には、凝縮水が生成する。そして、この凝縮水は、ＥＧＲ配管１５を排気ガスの下流側から上流側へと流れ落ちる。
そこで、この実施例において、排気管１１には、図４に示すように、センサ部１９のＥＧＲガス採取口２１側を覆う遮蔽部材（板材）２５を、排気センサ１８の近傍に配置している。
このような構造により、ＥＧＲガス採取口２１から飛散する凝縮水が排気センサ１８にかかるのを、遮蔽部材２５で防止することができる。よって、排気センサ１８の破損や検出精度の低下を防ぐことができる。つまり、この実施例では、車両に使用されるＥＧＲガスの取り出し構造と排気センサの取り付け構造とが一体となった排気マニホールド８において、車両搭載要件等の要因によってＥＧＲガス採取口２１近傍に排気センサ１８の取り付け構造を設けた場合に、ＥＧＲ採取口２１から逆流した凝縮水が排気センサ１８に被水するのを回避させ、センサ部１９の故障を防ぐことができる。 Further, as shown in FIGS. 4 and 5, the exhaust pipe 11 is formed with an EGR gas sampling port 21 that opens into the exhaust passage 10 at a position adjacent to the sensor unit 19. An EGR pipe 15 is attached to the EGR gas sampling port 21 so that the EGR passage 14 communicates therewith. The EGR pipe 15 is connected to the exhaust pipe 11 by connecting the pipe side connection flange 24 to the exhaust pipe side connection flange 23 of the connection pipe 22 connected to the EGR gas sampling port 21 of the exhaust pipe 11.
As shown in FIG. 1, the EGR pipe 15 extends horizontally from the connection pipe 22 to the right side of the vehicle and is bent to the cylinder block 2 side and extends obliquely upward to the EGR cooler 16 when viewed from the front of the engine 1. The first EGR pipe 15 </ b> A to be connected and the second EGR pipe 15 </ b> B extending from the EGR cooler 16 to the right side portion of the engine 1 and connected to the intake passage disposed on the rear side portion.
In such an exhaust device 6, EGR gas flowing through the EGR pipe 15 is usually cooled by the EGR cooler 16. The water vapor in the EGR gas is condensed by the EGR cooler 16. Thereafter, condensed water is generated in the EGR pipe 15. The condensed water flows down from the downstream side of the exhaust gas to the upstream side of the EGR pipe 15.
Therefore, in this embodiment, as shown in FIG. 4, in the exhaust pipe 11, a shielding member (plate material) 25 that covers the EGR gas sampling port 21 side of the sensor unit 19 is disposed in the vicinity of the exhaust sensor 18. .
With such a structure, the shielding member 25 can prevent the condensed water scattered from the EGR gas sampling port 21 from being applied to the exhaust sensor 18. Therefore, it is possible to prevent the exhaust sensor 18 from being damaged and the detection accuracy from being lowered. That is, in this embodiment, in the exhaust manifold 8 in which the structure for taking out the EGR gas used in the vehicle and the structure for mounting the exhaust sensor are integrated, the exhaust sensor is located near the EGR gas sampling port 21 due to factors such as vehicle mounting requirements. When the 18 attachment structure is provided, it is possible to prevent the condensed water flowing backward from the EGR sampling port 21 from getting wet in the exhaust sensor 18 and to prevent the sensor unit 19 from being damaged.

また、図７（Ａ）、図７（Ｂ）、図７（Ｃ）に示すように、遮蔽部材２５は、センサボス１７と一体に形成されている。つまり、このセンサボス１７は、排気センサ１８のセンサ基部２６を挿着するための導入孔２７を有するボス本体２８と、排気ガスの流れが直接排気センサ１８のセンサ部１９に当たらないように断面円弧形状の遮蔽部材２５とを一体にして構成される。
これにより、センサボス１７と別体の遮蔽部材を設置する場合に較べて、遮蔽部材２５がセンサボス１７と一体の方が、製造性を良くすることができ、また、その構造がコンパクトにできるため、排気管１１の狭い空間内に遮熱部材２５を容易に配置することが可能となる。 Further, as shown in FIGS. 7A, 7B, and 7C, the shielding member 25 is formed integrally with the sensor boss 17. That is, the sensor boss 17 has a cross-sectional arc so that the exhaust gas flow does not directly hit the sensor portion 19 of the exhaust sensor 18 and the boss body 28 having the introduction hole 27 for inserting the sensor base portion 26 of the exhaust sensor 18. The shape shielding member 25 is integrally formed.
Thereby, compared with the case where the shield member separate from the sensor boss 17 is installed, since the shield member 25 and the sensor boss 17 are integrated, the manufacturability can be improved and the structure can be made compact. The heat shield member 25 can be easily arranged in the narrow space of the exhaust pipe 11.

また、図６に示すように、遮蔽部材２５は、排気管１１と同方向に沿った形状を有している。具体的には、排気管１１が曲げ部位１１Ｒを有している場合には、遮蔽部材２５を排気管１１の曲げ部位と同方向に曲がった形状（湾曲板）とする。
このような構造により、遮熱部材２５を排気管１１内の排気ガスの流れと同方向に沿わせた形状とすることにより、抵抗を低減でき、また、センサ感度低下を車両制御に影響を与えないレベルまで抑えることができる。
一方、排気管１１が直線状の直管である場合には、遮蔽部材２５を平坦形状（平板）とする。 As shown in FIG. 6, the shielding member 25 has a shape along the same direction as the exhaust pipe 11. Specifically, when the exhaust pipe 11 has a bent portion 11R, the shielding member 25 is bent (curved plate) in the same direction as the bent portion of the exhaust pipe 11.
With such a structure, the heat shield member 25 is shaped in the same direction as the flow of the exhaust gas in the exhaust pipe 11, so that the resistance can be reduced and the decrease in sensor sensitivity affects the vehicle control. It can be suppressed to no level.
On the other hand, when the exhaust pipe 11 is a straight straight pipe, the shielding member 25 has a flat shape (flat plate).

さらに、排気装置９においては、図３に示すように、排気管１１には、連結フランジ２９に後側排気管３０が連結される。   Further, in the exhaust device 9, as shown in FIG. 3, a rear exhaust pipe 30 is connected to the exhaust pipe 11 to a connection flange 29.

なお、この発明においては、センサボス以外にも、別部品（例えば、板金カバー等）や、排気センサ自体に同様のカバー構造を設けることで、同様の効果を得ることができる。   In addition, in this invention, the same effect can be acquired by providing the same cover structure in another components (for example, sheet metal cover etc.) other than a sensor boss | hub, or exhaust_gas | exhaustion sensor itself.

この発明に係る排気装置を、各種エンジンに適用可能である。   The exhaust device according to the present invention can be applied to various engines.

１ エンジン
６ 排気装置
１０ 排気通路
１１ 排気管
１３ ＥＧＲ装置
１４ ＥＧＲ通路
１５ ＥＧＲ配管
１６ ＥＧＲクーラ
１７ センサボス
１８ 排気センサ
１９ センサ部
２１ ＥＧＲガス採取口
２２ 接続管
２５ 遮蔽部材
２６ センサ基部
２７ 導入孔
２８ ボス本体 DESCRIPTION OF SYMBOLS 1 Engine 6 Exhaust device 10 Exhaust passage 11 Exhaust pipe 13 EGR device 14 EGR passage 15 EGR piping 16 EGR cooler 17 Sensor boss 18 Exhaust sensor 19 Sensor part 21 EGR gas sampling port 22 Connection pipe 25 Shielding member 26 Sensor base 27 Introduction hole 28 Boss Body

Claims (2)

排気通路を有する排気管と、前記排気管にセンサボスを介して取付けられてセンサ部が前記排気通路内に突出する排気センサと、前記センサ部と隣接する位置にて前記排気通路内に開口するＥＧＲガス採取口と、前記ＥＧＲガス採取口から排気ガスの一部を取り出して吸気通路に再循環するＥＧＲ通路を有するＥＧＲ配管とを備えたエンジンの排気装置において、
前記センサボスは、前記排気センサを挿着するための導入孔を有するボス本体と、前記ボス本体と一体的に形成されて前記センサ部の近傍に配置される遮蔽部材と、を有し、
前記遮蔽部材は、前記ＥＧＲガス採取口を覆うように前記センサ部に対して前記ＥＧＲガス採取口側のみに設けられ、
前記遮蔽部材の縦断面形状が前記排気管内を流れる排気ガスの流れに沿って延びるように、前記センサボスを前記排気管に取り付けたことを特徴とするエンジンの排気装置。 An exhaust pipe having an exhaust passage, an exhaust sensor attached to the exhaust pipe via a sensor boss and having a sensor portion projecting into the exhaust passage, and an EGR opening in the exhaust passage at a position adjacent to the sensor portion In an engine exhaust system comprising a gas sampling port and an EGR pipe having an EGR passage that extracts a part of the exhaust gas from the EGR gas sampling port and recirculates it to the intake passage.
The sensor boss has a boss body having an introduction hole for inserting the exhaust sensor, and a shielding member formed integrally with the boss body and disposed in the vicinity of the sensor unit,
The shielding member is provided only on the EGR gas sampling port side with respect to the sensor unit so as to cover the EGR gas sampling port,
An exhaust system for an engine , wherein the sensor boss is attached to the exhaust pipe so that a longitudinal sectional shape of the shielding member extends along a flow of exhaust gas flowing in the exhaust pipe . 前記排気管は、湾曲形状の曲げ部位を有し、
前記排気センサを前記曲げ部位に取り付け、
前記遮蔽部材を前記曲げ部位の湾曲形状に沿って延びる断面円弧形状としたことを特徴とする請求項１に記載のエンジンの排気装置。 The exhaust pipe has a curved bent portion,
Attach the exhaust sensor to the bent part
2. The engine exhaust device according to claim 1, wherein the shielding member has a circular arc shape that extends along a curved shape of the bent portion .
JP2013142282A 2013-07-08 2013-07-08 Engine exhaust system Active JP6132093B2 (en)

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DE102014009870.2A DE102014009870A1 (en) 2013-07-08 2014-07-03 Engine Exhaust Device (EXHAUST DEVICE OF ENGINE)
CN201410318247.8A CN104279037B (en) 2013-07-08 2014-07-04 Exhaust device of engine

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