JP2016098769A - Exhaust emission control device - Google Patents

Exhaust emission control device Download PDF

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JP2016098769A
JP2016098769A JP2014237894A JP2014237894A JP2016098769A JP 2016098769 A JP2016098769 A JP 2016098769A JP 2014237894 A JP2014237894 A JP 2014237894A JP 2014237894 A JP2014237894 A JP 2014237894A JP 2016098769 A JP2016098769 A JP 2016098769A
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exhaust
exhaust pipe
sensor
protruding member
pipe
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JP6538334B2 (en
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宗弘 壷阪
Munehiro Tsubosaka
宗弘 壷阪
松本　直樹
Naoki Matsumoto
直樹 松本
冬樹 伊東
Fuyuki Ito
冬樹 伊東
淳 陣野
Atsushi Jinno
淳 陣野
英員 佐野
Hidekazu Sano
英員 佐野
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Futaba Industrial Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an exhaust emission control device that can suppress variation in components of exhaust gas hit against an exhaust sensor and enables components to be used in a plurality of types of exhaust systems of which optimal shapes of projecting portions are different from each other.SOLUTION: An exhaust emission control device includes a first exhaust pipe, a catalyst, a second exhaust pipe, an exhaust sensor and a projecting member. The first exhaust pipe forms an exhaust gas flow passage. The catalyst is accommodated in the first exhaust pipe to purify exhaust gas flowing in the first exhaust pipe. The second exhaust pipe forms an exhaust gas flow passage downstream of the first exhaust pipe. The exhaust sensor is disposed on the inner side of the second exhaust pipe. The projecting member is a component different from the second exhaust pipe, is joined to the outer surface of the second exhaust pipe and projects inward from the inner surface of the second exhaust pipe via a through hole formed on the second exhaust pipe.SELECTED DRAWING: Figure 2

Description

本発明は、内燃機関から排出される排ガスを浄化する排気浄化装置に関する。   The present invention relates to an exhaust purification device that purifies exhaust gas discharged from an internal combustion engine.

内燃機関から排出される排ガスを浄化する装置として、排気流路に触媒を配設した排気浄化装置が知られている。この種の排気浄化装置では、触媒の下流側の排気流路に、当該触媒による排ガスの浄化効果を判断するための排気センサが設けられる。   As an apparatus for purifying exhaust gas discharged from an internal combustion engine, an exhaust purification apparatus in which a catalyst is disposed in an exhaust passage is known. In this type of exhaust purification apparatus, an exhaust sensor for determining the exhaust gas purification effect of the catalyst is provided in the exhaust flow path downstream of the catalyst.

ところで、内燃機関から排出される排ガスの成分の分布は、例えば内燃機関における気筒間の燃焼状態のばらつきなどにより、排気流路において一様でなくばらついている。それにもかかわらず、触媒から流出した排ガスのうち、排気センサに当たるのは排気センサの近くを流れる一部の排ガスのみであり、排気センサから離れた位置を流れる排ガスは排気センサに当たらずに流れてしまう。その結果、排気センサに当たる排ガスの成分のばらつきが大きくなり、排気センサに基づく触媒の浄化効果の判断を正確に行えないという問題があった。   By the way, the distribution of the components of the exhaust gas discharged from the internal combustion engine varies non-uniformly in the exhaust passage due to, for example, variations in the combustion state between cylinders in the internal combustion engine. Nevertheless, of the exhaust gas flowing out from the catalyst, only a part of the exhaust gas flowing near the exhaust sensor hits the exhaust sensor, and the exhaust gas flowing away from the exhaust sensor flows without hitting the exhaust sensor. End up. As a result, there has been a problem that the variation in the components of the exhaust gas hitting the exhaust sensor becomes large, and the determination of the catalyst purification effect based on the exhaust sensor cannot be performed accurately.

このような問題を解決するために、排気センサの上流側に排気流路内側に突出した突出部を形成し、排気センサから離れた位置を流れる排ガスを当該突出部により排気センサ側に導くようにした排気管が提案されている（特許文献１参照）。   In order to solve such a problem, a projecting portion projecting inward of the exhaust flow path is formed on the upstream side of the exhaust sensor, and exhaust gas flowing away from the exhaust sensor is guided to the exhaust sensor side by the projecting portion. An exhaust pipe has been proposed (see Patent Document 1).

特開２０１３−１２７２１０号公報JP 2013-127210 A

しかしながら、前述した特許文献１に記載の排気管は、例えば、種類（例えば自動車の車種）の異なる排気系に流用しようとした場合、突出部の最適な形状が異なり得る。このため、排気流路の形状を共通化できたとしても、突出部の形状を共通化できない限り、同じ排気管を異なる排気系で流用できない問題があった。   However, in the exhaust pipe described in Patent Document 1 described above, for example, when trying to divert to an exhaust system of a different type (for example, a vehicle type), the optimal shape of the protruding portion may be different. For this reason, even if the shape of the exhaust flow path can be made common, there is a problem that the same exhaust pipe cannot be used in different exhaust systems unless the shape of the protruding portion can be made common.

本発明は、排気センサに当たる排ガスの成分のばらつきを抑えることができ、かつ、突出部の最適な形状が異なる複数種類の排気系で部品の流用が可能な排気浄化装置の提供を目的としている。   An object of the present invention is to provide an exhaust emission control device that can suppress variation in components of exhaust gas hitting an exhaust sensor and that can divert components in a plurality of types of exhaust systems having different optimal shapes of protrusions.

本発明の一側面は、排気浄化装置であって、第１の排気管と、触媒と、第２の排気管と、排気センサと、突出部材と、を備える。第１の排気管は、排気流路を形成する。触媒は、第１の排気管に収容され、第１の排気管を流れる排ガスを浄化する。第２の排気管は、第１の排気管の下流側で排気流路を形成する。排気センサは、第２の排気管の内側に配設される。突出部材は、第２の排気管とは別部品であって、第２の排気管の外面に接合され、第２の排気管に形成された貫通孔を介して第２の排気管の内面よりも内側に突出する。   One aspect of the present invention is an exhaust purification device, which includes a first exhaust pipe, a catalyst, a second exhaust pipe, an exhaust sensor, and a protruding member. The first exhaust pipe forms an exhaust passage. The catalyst is accommodated in the first exhaust pipe and purifies the exhaust gas flowing through the first exhaust pipe. The second exhaust pipe forms an exhaust passage on the downstream side of the first exhaust pipe. The exhaust sensor is disposed inside the second exhaust pipe. The projecting member is a separate part from the second exhaust pipe, and is joined to the outer surface of the second exhaust pipe, and from the inner surface of the second exhaust pipe through a through hole formed in the second exhaust pipe. Also protrudes inward.

このような構成によれば、排気センサに当たる排ガスの成分のばらつきを突出部材により抑えることができ、かつ、突出部材の最適な形状が異なる複数種類の排気系で少なくとも第２の排気管の流用が可能となる。   According to such a configuration, the variation in the components of the exhaust gas hitting the exhaust sensor can be suppressed by the protruding member, and at least the second exhaust pipe can be diverted by a plurality of types of exhaust systems having different optimal shapes of the protruding member. It becomes possible.

上記構成において、突出部材及び排気センサは、第２の排気管の軸方向に垂直な共通の断面と交わる位置に配設されてもよい。このような構成によれば、排気流路の一部が突出部材及び排気センサの両方によって覆われ、排気流路を流れる排ガスを排気センサに導きやすくすることができる。   In the above configuration, the protruding member and the exhaust sensor may be disposed at a position that intersects a common cross section perpendicular to the axial direction of the second exhaust pipe. According to such a configuration, a part of the exhaust passage is covered with both the projecting member and the exhaust sensor, and the exhaust gas flowing through the exhaust passage can be easily guided to the exhaust sensor.

上記構成において、突出部材は、排気センサと対向する位置に配設されてもよい。このような構成によれば、排気センサと対向する位置が突出部材によって覆われ、突出部材が配設されていなければ排気センサに当たりにくい位置を流れる排ガスを排気センサに導きやすくすることができる。   In the above configuration, the protruding member may be disposed at a position facing the exhaust sensor. According to such a configuration, the position facing the exhaust sensor is covered with the projecting member, and if the projecting member is not disposed, it is possible to easily guide the exhaust gas flowing through the position that is difficult to hit the exhaust sensor to the exhaust sensor.

上記構成において、突出部材には、第２の排気管の外面に当接するつば部が形成されてもよい。このような構成によれば、突出部材の落下を防止することができる。加えて、つば部が外面に当接することにより、溶接の際に突出部材の位置を定めやすくすることができる。   In the above configuration, the protruding member may be formed with a collar portion that contacts the outer surface of the second exhaust pipe. According to such a configuration, the protruding member can be prevented from falling. In addition, since the collar portion comes into contact with the outer surface, the position of the protruding member can be easily determined during welding.

実施形態の排気浄化装置を含む排気系の外観図である。1 is an external view of an exhaust system including an exhaust purification device of an embodiment. 実施形態の排気浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus of embodiment. 図２のIII−III断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 2. 図４（Ａ）は実施形態の突出部材の斜視図、図４（Ｂ）は実施形態の突出部材をその中心軸に沿って突起側から見た正面図、図４（Ｃ）は実施形態の突出部材をその中心軸と直交する方向から見た側面図である。4A is a perspective view of the protruding member of the embodiment, FIG. 4B is a front view of the protruding member of the embodiment as viewed from the protrusion side along the central axis, and FIG. 4C is the embodiment. It is the side view which looked at the protrusion member from the direction orthogonal to the central axis. 第１変形例の排気浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus of a 1st modification. 図５のVI−VI断面図である。It is VI-VI sectional drawing of FIG. 図７（Ａ）は第１変形例の突出部材の斜視図、図７（Ｂ）は第１変形例の突出部材をその中心軸に沿って突起側から見た正面図、図７（Ｃ）は第１変形例の突出部材をその中心軸と直交する方向から見た側面図である。7A is a perspective view of the projecting member of the first modification, FIG. 7B is a front view of the projecting member of the first modification viewed from the projection side along the central axis, and FIG. 7C. [FIG. 6] is a side view of a projecting member of a first modification viewed from a direction orthogonal to the central axis. 第２変形例の排気浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus of a 2nd modification. 第３変形例の排気浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus of a 3rd modification.

以下、本発明の例示的な実施形態について図面を参照しながら説明する。
［１．構成］
図１及び図２に示す排気浄化装置１は、自動車の内燃機関から排出された排ガスを浄化するための装置であり、内燃機関の各気筒から排出された排ガスを合流させるエキゾーストマニホールド５の下流側に設けられている。 Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.
[1. Constitution]
An exhaust purification device 1 shown in FIGS. 1 and 2 is a device for purifying exhaust gas discharged from an internal combustion engine of an automobile, and is downstream of an exhaust manifold 5 that joins exhaust gas discharged from each cylinder of the internal combustion engine. Is provided.

排気浄化装置１は、上流側コーン１１と、触媒ケース１２と、下流側コーン１３と、触媒１４と、排気センサ１５と、突出部材３０と、を備える。上流側コーン１１、触媒ケース１２及び下流側コーン１３は、内燃機関から排出された排ガスを自動車の外部へ導くための排気流路の一部を形成する。   The exhaust purification device 1 includes an upstream cone 11, a catalyst case 12, a downstream cone 13, a catalyst 14, an exhaust sensor 15, and a protruding member 30. The upstream cone 11, the catalyst case 12, and the downstream cone 13 form part of an exhaust passage for guiding exhaust gas discharged from the internal combustion engine to the outside of the automobile.

上流側コーン１１は、エキゾーストマニホールド５の下流側に設けられ、エキゾーストマニホールド５を介して流入する排ガスを触媒１４へ導く排気流路を形成する。
触媒ケース１２は、上流側コーン１１の下流側で排気流路を形成する。 The upstream cone 11 is provided on the downstream side of the exhaust manifold 5, and forms an exhaust passage that guides exhaust gas flowing in through the exhaust manifold 5 to the catalyst 14.
The catalyst case 12 forms an exhaust passage on the downstream side of the upstream cone 11.

下流側コーン１３は、触媒ケース１２と共通する中心軸１２２を有し、触媒ケース１２の下流側で排気流路を形成する。また、下流側コーン１３における排気センサ１５が配設される位置と対向する位置には、突出部材３０を配設するための貫通孔１３ａが形成されている。   The downstream cone 13 has a central axis 122 that is common to the catalyst case 12, and forms an exhaust passage on the downstream side of the catalyst case 12. In addition, a through hole 13 a for disposing the protruding member 30 is formed at a position opposite to the position where the exhaust sensor 15 is disposed in the downstream cone 13.

触媒１４は、触媒ケース１２に収容され、触媒ケース１２を流れる排ガスを浄化する。
排気センサ１５は、触媒１４の排ガス浄化効果を判断するためのセンサであり、触媒１４の下流側に設けられている。具体的には、排気センサ１５は、下流側コーン１３により形成される排気流路に、センサ部が突出するように配設され、当該排気流路を流れる排ガスの成分（本実施形態では酸素濃度）を検出する。 The catalyst 14 is accommodated in the catalyst case 12 and purifies the exhaust gas flowing through the catalyst case 12.
The exhaust sensor 15 is a sensor for determining the exhaust gas purification effect of the catalyst 14, and is provided on the downstream side of the catalyst 14. Specifically, the exhaust sensor 15 is disposed in an exhaust passage formed by the downstream cone 13 so that the sensor portion protrudes, and an exhaust gas component (oxygen concentration in the present embodiment) flowing through the exhaust passage. ) Is detected.

突出部材３０は、図４（Ａ）、図４（Ｂ）及び図４（Ｃ）に示すように、曲面状のつば部３０ａと、上面が平面をなす突出部３０ｂと、を備える帽子状の部材である。図２及び図３に示すように、突出部材３０は、下流側コーン１３の外側から突出部３０ｂが貫通孔１３ａに挿入された状態で、下流側コーン１３の外面に当接したつば部３０ａが溶接されることにより、下流側コーン１３に配設されている。このため、突出部３０ｂは、排気センサ１５と対向する位置で、下流側コーン１３の内面よりも内側（排気流路）に突出する。また、排気センサ１５及び突出部３０ｂは、下流側コーン１３の軸方向に垂直な共通の断面と交わる位置に配設されている。図２に示すように、突出部材３０は、排ガスが当たり高温になり得るため、下流側コーン１３よりも板厚が厚く、耐高温性に優れた材料（本実施形態では耐熱ステンレス）で形成されている。   As shown in FIGS. 4 (A), 4 (B), and 4 (C), the protruding member 30 has a hat-like shape including a curved collar portion 30a and a protruding portion 30b having a flat upper surface. It is a member. As shown in FIGS. 2 and 3, the protruding member 30 has a collar portion 30 a that abuts on the outer surface of the downstream cone 13 in a state where the protruding portion 30 b is inserted into the through hole 13 a from the outside of the downstream cone 13. It is disposed on the downstream cone 13 by welding. For this reason, the protrusion 30 b protrudes inward (exhaust flow path) from the inner surface of the downstream cone 13 at a position facing the exhaust sensor 15. Further, the exhaust sensor 15 and the projecting portion 30 b are disposed at a position that intersects a common cross section perpendicular to the axial direction of the downstream cone 13. As shown in FIG. 2, the protruding member 30 is formed of a material (heat resistant stainless steel in the present embodiment) that is thicker than the downstream cone 13 and excellent in high temperature resistance because the exhaust gas can hit and become high temperature. ing.

［２．作用］
次に、本実施形態の排気浄化装置１の作用について説明する。
図１及び図２に示すように、内燃機関の各気筒から排出された排ガスは、エキゾーストマニホールド５及び上流側コーン１１を介して触媒１４へ導かれ、触媒１４によって浄化される。浄化された排ガスは、触媒１４から下流側コーン１３へ流出した後、その一部は排気センサ１５の方向へ流れ、また他の一部は突出部材３０の方向へ流れる。突出部材３０の方向に流れた排ガスは、突出部材３０に当たることにより、その一部が排気センサ１５方向へ導かれる。その結果、排気センサ１５に当たる排ガスの成分のばらつきが抑えられる。 [2. Action]
Next, the operation of the exhaust emission control device 1 of the present embodiment will be described.
As shown in FIGS. 1 and 2, the exhaust gas discharged from each cylinder of the internal combustion engine is guided to the catalyst 14 via the exhaust manifold 5 and the upstream cone 11 and purified by the catalyst 14. After the purified exhaust gas flows out from the catalyst 14 to the downstream cone 13, a part thereof flows toward the exhaust sensor 15, and the other part flows toward the protruding member 30. A part of the exhaust gas flowing in the direction of the projecting member 30 is guided to the exhaust sensor 15 by hitting the projecting member 30. As a result, variations in exhaust gas components that hit the exhaust sensor 15 are suppressed.

［３．効果］
以上詳述した実施形態によれば、以下の効果が得られる。
（１ａ）排気浄化装置１では、下流側コーン１３とは別部品の突出部材３０が、下流側コーン１３の外面に接合され、下流側コーン１３に形成された貫通孔１３ａを介して下流側コーン１３の内面よりも内側に突出している。このため、排気センサ１５に当たる排ガスの成分のばらつきを突出部材３０により抑えることができ、かつ、突出部材３０の最適な形状が異なる複数種類の排気系で少なくとも下流側コーン１３の流用が可能となる。 [3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) In the exhaust emission control device 1, a protruding member 30, which is a separate component from the downstream cone 13, is joined to the outer surface of the downstream cone 13 and is connected to the downstream cone via a through hole 13 a formed in the downstream cone 13. It protrudes inward from the inner surface of 13. For this reason, the variation in the component of the exhaust gas hitting the exhaust sensor 15 can be suppressed by the protruding member 30, and at least the downstream cone 13 can be diverted by a plurality of types of exhaust systems having different optimal shapes of the protruding member 30. .

（１ｂ）突出部材３０及び排気センサ１５は、下流側コーン１３の軸方向に垂直な共通の断面と交わる位置に配設される。したがって、本実施形態によれば、排気流路の一部が突出部材３０及び排気センサ１５の両方によって覆われ、排気流路を流れる排ガスを排気センサ１５に導きやすくすることができる。   (1b) The protruding member 30 and the exhaust sensor 15 are disposed at a position that intersects a common cross section perpendicular to the axial direction of the downstream cone 13. Therefore, according to the present embodiment, a part of the exhaust passage is covered by both the protruding member 30 and the exhaust sensor 15, and the exhaust gas flowing through the exhaust passage can be easily guided to the exhaust sensor 15.

（１ｃ）突出部材３０は、排気センサ１５と対向する位置に配設される。したがって、本実施形態によれば、排気センサ１５と対向する位置が突出部材３０によって覆われ、突出部材３０が配設されていなければ排気センサ１５に当たりにくい排気流路内の位置を流れる排ガスを排気センサ１５に導きやすくすることができる。   (1c) The protruding member 30 is disposed at a position facing the exhaust sensor 15. Therefore, according to the present embodiment, the position facing the exhaust sensor 15 is covered by the protruding member 30, and exhaust gas flowing through the position in the exhaust flow path that is difficult to hit the exhaust sensor 15 if the protruding member 30 is not disposed is exhausted. It can be easily guided to the sensor 15.

（１ｄ）突出部材３０には、下流側コーン１３の外面に当接するつば部３０ａが形成される。したがって、本実施形態によれば、突出部材３０の落下を防止することができる。また、つば部３０ａを溶接することにより、下流側コーン１３の内側（排気流路）にスパッタなどの異物が混入することを防ぐことができる。加えて、つば部３０ａが下流側コーン１３の外面に当接するため、溶接の際に突出部材３０の位置を定めやすくすることができる。   (1d) The protruding member 30 is formed with a collar portion 30 a that contacts the outer surface of the downstream cone 13. Therefore, according to the present embodiment, the protruding member 30 can be prevented from dropping. Further, by welding the collar portion 30a, it is possible to prevent foreign matters such as spatter from entering the inside (exhaust flow path) of the downstream cone 13. In addition, since the collar portion 30a contacts the outer surface of the downstream cone 13, the position of the protruding member 30 can be easily determined during welding.

なお、本実施形態では、上流側コーン１１が第１の排気管の一例に相当し、下流側コーン１３が第２の排気管の一例に相当する。
［４．他の実施形態］
以上、本発明の実施形態について説明したが、本発明は、上記実施形態に限定されることなく、種々の形態を取り得ることは言うまでもない。 In the present embodiment, the upstream cone 11 corresponds to an example of a first exhaust pipe, and the downstream cone 13 corresponds to an example of a second exhaust pipe.
[4. Other Embodiments]
As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention can take a various form, without being limited to the said embodiment.

（２ａ）上記実施形態では、排気センサ１５として酸素センサを例示したが、これに限定されるものではない。例えば、ＮＯｘセンサ、空燃費センサ又は温度センサが用いられた排気浄化装置に対しても本発明は適用可能である。   (2a) In the above embodiment, the oxygen sensor is exemplified as the exhaust sensor 15, but the exhaust sensor 15 is not limited to this. For example, the present invention can be applied to an exhaust purification device using a NOx sensor, an air fuel consumption sensor, or a temperature sensor.

（２ｂ）上記実施形態では、突出部３０ｂの上面が平面をなす帽子状の突出部材３０を例示したが、これに限定されるものではない。
例えば、図５に示す第１変形例の排気浄化装置２は、上記実施形態の排気浄化装置１と比較すると、突出部材３０に代えて、突出部材４０が用いられている点が異なる。図７（Ａ）、図７（Ｂ）及び図７（Ｃ）に示すように、第１変形例の突出部材４０は、上記実施形態のつば部３０ａと同様の曲面状のつば部４０ａと、上面が概略半球状の突出部４０ｂと、を備える帽子状の部材である。なお、上記実施形態と同様、突出部４０ｂは、図５及び図６に示すように、排気センサ１５と対向する位置で、下流側コーン１３の内面よりも内側（排気流路）に突出する。また、排気センサ１５及び突出部４０ｂは、下流側コーン１３の軸方向に垂直な共通の断面と交わる位置に配設されている。このような構成によっても、上記実施形態と同様の効果が得られる。 (2b) In the above embodiment, the cap-shaped projecting member 30 whose upper surface of the projecting portion 30b is a flat surface is illustrated, but the present invention is not limited to this.
For example, the exhaust gas purification device 2 of the first modification shown in FIG. 5 is different from the exhaust gas purification device 1 of the above embodiment in that a protruding member 40 is used instead of the protruding member 30. As shown in FIGS. 7 (A), 7 (B) and 7 (C), the protruding member 40 of the first modified example has a curved collar 40a similar to the collar 30a of the above embodiment, It is a cap-shaped member provided with the protrusion part 40b whose upper surface is substantially hemispherical. Similar to the above-described embodiment, the protruding portion 40b protrudes inward (exhaust flow path) from the inner surface of the downstream cone 13 at a position facing the exhaust sensor 15 as shown in FIGS. Further, the exhaust sensor 15 and the protruding portion 40b are disposed at a position that intersects a common cross section perpendicular to the axial direction of the downstream cone 13. Even with such a configuration, the same effect as in the above embodiment can be obtained.

また例えば、図８に示す第２変形例の排気浄化装置３は、上記実施形態の排気浄化装置１と比較すると、下流側コーン１３に代えて、下流側コーン２３が用いられている点が異なる。第２変形例の下流側コーン２３には、上記実施形態の下流側コーン１３の貫通孔１３ａよりも上流側（排気センサ１５よりも上流側）に、貫通孔２３ａが形成されている。そして、突出部材３０は、下流側コーン２３の外側から突出部３０ｂが貫通孔２３ａに挿入された状態で、下流側コーン２３の外面に当接したつば部３０ａが溶接されることにより、下流側コーン２３に配設されている。このため、突出部３０ｂは、排気センサ１５よりも上流側で、下流側コーン２３の内面よりも内側（排気流路）に突出する。このような構成によれば、排気流路を流れる排ガスが排気センサ１５の上流側で排気センサ１５側に導かれるため、上記実施形態と同様の効果が得られる。   Further, for example, the exhaust purification device 3 of the second modification shown in FIG. 8 is different from the exhaust purification device 1 of the above embodiment in that a downstream cone 23 is used instead of the downstream cone 13. . A through hole 23a is formed in the downstream cone 23 of the second modified example upstream of the through hole 13a of the downstream cone 13 of the above embodiment (upstream of the exhaust sensor 15). The protruding member 30 is welded to the flange portion 30a that is in contact with the outer surface of the downstream cone 23 in a state where the protruding portion 30b is inserted into the through hole 23a from the outside of the downstream cone 23. The cone 23 is disposed. For this reason, the protrusion 30 b protrudes inward (exhaust flow path) from the inner surface of the downstream cone 23 on the upstream side of the exhaust sensor 15. According to such a configuration, the exhaust gas flowing through the exhaust flow channel is guided to the exhaust sensor 15 side on the upstream side of the exhaust sensor 15, and thus the same effect as in the above embodiment can be obtained.

また例えば、図９に示す第３変形例の排気浄化装置４は、第２変形例の排気浄化装置３と比較すると、突出部材３０に代えて、第１変形例と同じ突出部材４０が用いられている点が異なる。つまり、突出部４０ｂが、排気センサ１５よりも上流側で、下流側コーン２３の内面よりも内側（排気流路）に突出する。このような構成によっても、上記実施形態と同様の効果が得られる。   Further, for example, the exhaust purification device 4 of the third modification shown in FIG. 9 uses the same projecting member 40 as that of the first modification instead of the projecting member 30 as compared with the exhaust purification device 3 of the second modification. Is different. That is, the protrusion 40 b protrudes upstream of the exhaust sensor 15 and inward (exhaust flow path) from the inner surface of the downstream cone 23. Even with such a configuration, the same effect as in the above embodiment can be obtained.

（２ｃ）上記実施形態では、突出部材３０が、排気センサ１５と対向する位置（下流側コーン１３の軸方向に垂直な断面において１８０度の角度をなす位置）に配設されている構成を例示したが、これに限定されるものではない。例えば、下流側コーン１３の軸方向に垂直な断面において９０度の角度をなす位置や、１２０度の角度をなす位置に配設されてもよい。   (2c) In the said embodiment, the structure by which the protrusion member 30 is arrange | positioned in the position (position which makes an angle of 180 degree | times in the cross section perpendicular | vertical to the axial direction of the downstream cone 13) facing the exhaust sensor 15 is illustrated. However, the present invention is not limited to this. For example, it may be disposed at a position forming an angle of 90 degrees in a cross section perpendicular to the axial direction of the downstream cone 13 or a position forming an angle of 120 degrees.

（２ｄ）上記実施形態では、突出部材３０が、下流側コーン１３よりも板厚が厚く、耐高温性に優れた材料で形成されている構成を例示したが、これに限定されるものではない。例えば、突出部材３０は、下流側コーン１３と同じ板厚であってもよく、また、同じ材料で形成されてもよい。   (2d) In the above-described embodiment, the protruding member 30 has a configuration in which the plate thickness is thicker than that of the downstream cone 13 and is formed of a material excellent in high temperature resistance. However, the present invention is not limited to this. . For example, the protruding member 30 may have the same plate thickness as the downstream cone 13 or may be formed of the same material.

（２ｅ）上記実施形態では、突出部材３０が溶接により下流側コーン１３と接合される構成を例示したが、これに限定されるものではなく、例えばろう付けによって接合されてもよい。   (2e) In the above-described embodiment, the configuration in which the protruding member 30 is joined to the downstream cone 13 by welding is illustrated, but the present invention is not limited to this, and may be joined by brazing, for example.

（２ｆ）上記実施形態では、１個の突出部材３０が下流側コーン１３に配設される構成を例示したが、これに限定されるものではなく、例えば複数個配設されてもよい。
（２ｇ）上記実施形態における１つの構成要素が有する機能を複数の構成要素として分散させたり、複数の構成要素が有する機能を１つの構成要素に統合したりしてもよい。また、上記実施形態の構成の少なくとも一部を、同様の機能を有する公知の構成に置き換えてもよい。また、上記実施形態の構成の一部を、課題を解決できる限りにおいて省略してもよい。また、上記実施形態の構成の少なくとも一部を、他の上記実施形態の構成に対して付加、置換等してもよい。なお、特許請求の範囲に記載の文言から特定される技術思想に含まれるあらゆる態様が本発明の実施形態である。 (2f) In the above embodiment, the configuration in which one projecting member 30 is disposed on the downstream cone 13 is illustrated, but the present invention is not limited to this, and a plurality of the projecting members 30 may be disposed, for example.
(2g) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment as long as a subject can be solved. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present invention.

１，２，３，４…排気浄化装置、５…エキゾーストマニホールド、１１…上流側コーン、１２…触媒ケース、１３，２３…下流側コーン、１３ａ，２３ａ…貫通孔、１４…触媒、１５…排気センサ、３０，４０…突出部材、３０ａ，４０ａ…つば部、３０ｂ，４０ｂ…突出部、１２２…中心軸。   1, 2, 3, 4 ... Exhaust purification device, 5 ... Exhaust manifold, 11 ... Upstream cone, 12 ... Catalyst case, 13, 23 ... Downstream cone, 13a, 23a ... Through hole, 14 ... Catalyst, 15 ... Exhaust Sensor, 30, 40 ... projecting member, 30a, 40a ... collar, 30b, 40b ... projecting, 122 ... central axis.

Claims (4)

排気流路を形成する第１の排気管と、
前記第１の排気管に収容され、前記第１の排気管を流れる排ガスを浄化する触媒と、
前記第１の排気管の下流側で排気流路を形成する第２の排気管と、
前記第２の排気管の内側に配設された排気センサと、
前記第２の排気管とは別部品であって、前記第２の排気管の外面に接合され、前記第２の排気管に形成された貫通孔を介して前記第２の排気管の内面よりも内側に突出する突出部材と、
を備える排気浄化装置。 A first exhaust pipe forming an exhaust passage;
A catalyst housed in the first exhaust pipe and purifying the exhaust gas flowing through the first exhaust pipe;
A second exhaust pipe that forms an exhaust passage downstream of the first exhaust pipe;
An exhaust sensor disposed inside the second exhaust pipe;
The second exhaust pipe is a separate part, joined to the outer surface of the second exhaust pipe, and from the inner surface of the second exhaust pipe through a through hole formed in the second exhaust pipe. And a protruding member that protrudes inward,
An exhaust purification device comprising: 請求項１に記載の排気浄化装置であって、
前記突出部材及び前記排気センサは、前記第２の排気管の軸方向に垂直な共通の断面と交わる位置に配設されている、排気浄化装置。 The exhaust emission control device according to claim 1,
The exhaust purification device, wherein the protruding member and the exhaust sensor are disposed at a position intersecting a common cross section perpendicular to the axial direction of the second exhaust pipe. 請求項２に記載の排気浄化装置であって、
前記突出部材は、前記排気センサと対向する位置に配設されている、排気浄化装置。 An exhaust emission control device according to claim 2,
The exhaust purification device, wherein the protruding member is disposed at a position facing the exhaust sensor. 請求項１から請求項３までのいずれか１項に記載の排気浄化装置であって、
前記突出部材には、前記第２の排気管の外面に当接するつば部が形成されている、排気浄化装置。 The exhaust emission control device according to any one of claims 1 to 3, wherein
An exhaust emission control device, wherein the protruding member is formed with a flange portion that comes into contact with an outer surface of the second exhaust pipe.
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