JP2020118086A - Exhaust gas cooling member - Google Patents

Exhaust gas cooling member Download PDF

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Publication number
JP2020118086A
JP2020118086A JP2019009573A JP2019009573A JP2020118086A JP 2020118086 A JP2020118086 A JP 2020118086A JP 2019009573 A JP2019009573 A JP 2019009573A JP 2019009573 A JP2019009573 A JP 2019009573A JP 2020118086 A JP2020118086 A JP 2020118086A
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Japan
Prior art keywords
exhaust gas
cooling member
main body
exhaust
divided body
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JP2019009573A
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Japanese (ja)
Inventor
一秀 高田
Kazuhide Takada
一秀 高田
隼人 齋藤
Hayato Saito
隼人 齋藤
雄紀 池田
Yuki Ikeda
雄紀 池田
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Isuzu Motors Ltd
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Isuzu Motors Ltd
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Priority to JP2019009573A priority Critical patent/JP2020118086A/en
Priority to CN202080009978.8A priority patent/CN113366205A/en
Priority to PCT/JP2020/000561 priority patent/WO2020153142A1/en
Publication of JP2020118086A publication Critical patent/JP2020118086A/en
Pending legal-status Critical Current

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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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • 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
    • F01N13/20—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 having flared outlets, e.g. of fish-tail shape

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

To effectively cool exhaust gas with an exhaust gas cooling member.SOLUTION: An exhaust gas cooling member 10 attached to a rear end part 4 of an exhaust gas pipe 3 for cooling exhaust gas includes a body part 20 in which a hollow part 21 through which the exhaust gas flows is formed, an inflow part 40 which is provided in one end side of the body part 20 connected to an exhaust gas pipe 3 and allows air to flow into the hollow part 21, and an outflow part 50 which is provided in the other end side of the body part 20 and in which an outflow port 52 is formed from which the exhaust gas and the air flow out. One of an upper split body 22 and a lower split body 24 of the body part 20 extends further outwardly in the other end side than the other.SELECTED DRAWING: Figure 4

Description

本発明は、排気管の端部に取り付けられる排気冷却部材に関する。 The present invention relates to an exhaust cooling member attached to an end of an exhaust pipe.

トラック等の車両の中には、エンジンの排気ガスが流れる排気管の端部に、排気ガスを空気で冷却させる排気冷却部材が取り付けられたものがある。排気冷却部材は、排気ガスが流れる空洞部と、空気を流入させる流入口とを有し、流入した空気で排気ガスを冷却する。 Some vehicles such as trucks have an exhaust cooling member attached to the end of an exhaust pipe through which exhaust gas of an engine flows to cool the exhaust gas with air. The exhaust cooling member has a cavity through which the exhaust gas flows and an inflow port into which the air flows, and cools the exhaust gas with the inflowing air.

特開２０１０−１２７１７７号公報JP, 2010-127177, A

ところで、排気冷却部材において排気ガスを空気で冷却させる（すなわち、排気ガスの温度を低下させる）ためには、多量の空気を流入させることが望ましい。しかし、従来の排気冷却部材の流入口では、流入できる空気の量に限界がある。 By the way, in order to cool the exhaust gas with air in the exhaust cooling member (that is, to lower the temperature of the exhaust gas), it is desirable to flow a large amount of air. However, there is a limit to the amount of air that can flow in at the inlet of the conventional exhaust cooling member.

そこで、本発明はこれらの点に鑑みてなされたものであり、排気冷却部材によって排気ガスを効果的に冷却することを目的とする。 Therefore, the present invention has been made in view of these points, and an object thereof is to effectively cool exhaust gas by an exhaust cooling member.

本発明の一の態様においては、排気管の端部に取り付けられ、排気ガスを冷却する排気冷却部材であって、前記排気ガスが流れる空洞部が形成された本体部と、前記本体部の前記排気管と連結される一端側に設けられ、空気を前記空洞部に流入させる流入部と、前記本体部の他端側に設けられ、前記排気ガス及び前記空気が流出する流出口が形成された流出部と、を備え、前記本体部の上壁及び下壁のうちの一方は、前記他端側において他方よりも外方へ延在している、排気冷却部材を提供する。 In one aspect of the present invention, an exhaust cooling member that is attached to an end portion of an exhaust pipe and cools exhaust gas, the main body having a cavity in which the exhaust gas flows, and the main body An inflow part, which is provided on one end side connected to the exhaust pipe and allows air to flow into the cavity, and an outflow port, which is provided on the other end side of the main body part and through which the exhaust gas and the air flow out, are formed. And an outflow portion, wherein one of the upper wall and the lower wall of the main body portion extends outward more than the other at the other end side.

また、前記本体部の前記上壁の端部が、前記他端側において前記下壁の端部よりも外方に位置していることとしてもよい。 Further, the end portion of the upper wall of the main body portion may be located outside the end portion of the lower wall on the other end side.

また、前記本体部は、前記上壁を成す上分割体と、前記下壁を成す下分割体とを含み、前記上分割体は、前記下分割体を覆っていることとしてもよい。 Further, the main body portion may include an upper divided body forming the upper wall and a lower divided body forming the lower wall, and the upper divided body may cover the lower divided body.

また、前記上分割体の横幅は、前記一端側から前記他端側へ向かうにつれて大きくなっていることとしてもよい。 In addition, the lateral width of the upper divided body may be increased from the one end side toward the other end side.

本発明によれば、排気冷却部材によって排気ガスを効果的に冷却できるという効果を奏する。 According to the present invention, it is possible to effectively cool the exhaust gas by the exhaust cooling member.

本発明の一の実施形態に係る排気冷却部材１０が取り付けられた車両１の構成の一部を説明するための模式図である。It is a schematic diagram for explaining a part of composition of vehicle 1 with which exhaust cooling member 10 concerning one embodiment of the present invention was attached. 排気冷却部材１０の構成を説明するための図である。FIG. 3 is a diagram for explaining a configuration of an exhaust cooling member 10. 排気冷却部材１０の構成を説明するための図である。FIG. 3 is a diagram for explaining a configuration of an exhaust cooling member 10. 排気冷却部材１０での排気ガス及び空気の流れを説明するための模式図である。3 is a schematic diagram for explaining flows of exhaust gas and air in the exhaust cooling member 10. FIG.

＜排気冷却部材の構成＞
本発明の一の実施形態に係る排気冷却部材が取り付けられた車両の概略構成について、図１を参照しながら説明する。 <Structure of exhaust cooling member>
A schematic configuration of a vehicle to which an exhaust cooling member according to an embodiment of the present invention is attached will be described with reference to FIG.

図１は、一の実施形態に係る排気冷却部材１０が取り付けられた車両１の構成の一部を説明するための模式図である。排気冷却部材１０は、図１に示すように、車両１（ここではトラック）の排気管３の後端部４に取り付けられている。具体的には、排気冷却部材１０は、排気管３の排気口に取り付けられている。 FIG. 1 is a schematic diagram for explaining a part of the configuration of a vehicle 1 to which an exhaust cooling member 10 according to an embodiment is attached. As shown in FIG. 1, the exhaust cooling member 10 is attached to the rear end portion 4 of the exhaust pipe 3 of the vehicle 1 (here, a truck). Specifically, the exhaust cooling member 10 is attached to the exhaust port of the exhaust pipe 3.

排気管３は、車両１のエンジンと連結されており、エンジンの排気ガスが流れる。排気管３の途中には、排気ガスを浄化する浄化装置５が設けられている。浄化装置５は、例えば排気ガス中の粒子状物質を捕集するＤＰＦ（Diesel Particulate Filter）や、排気ガス中のＮＯｘを還元反応させるＳＣＲ（Selective Catalytic Reduction）を含む。浄化装置５は、車両１のサイドフレーム８にブラケット９を介して固定されている。 The exhaust pipe 3 is connected to the engine of the vehicle 1 and exhaust gas of the engine flows. A purification device 5 for purifying exhaust gas is provided in the middle of the exhaust pipe 3. The purification device 5 includes, for example, a DPF (Diesel Particulate Filter) that collects particulate matter in the exhaust gas and an SCR (Selective Catalytic Reduction) that causes a reduction reaction of NOx in the exhaust gas. The purification device 5 is fixed to the side frame 8 of the vehicle 1 via a bracket 9.

排気冷却部材１０は、排気管３を流れる排気ガスを空気で冷却し、冷却した排気ガスを大気に流出させる。具体的には、排気冷却部材１０は、浄化装置５を通過した排気ガスを、取り込んだ空気で冷却する。 The exhaust cooling member 10 cools the exhaust gas flowing through the exhaust pipe 3 with air and causes the cooled exhaust gas to flow to the atmosphere. Specifically, the exhaust cooling member 10 cools the exhaust gas that has passed through the purification device 5 with the taken-in air.

次に、図２〜図４を参照しながら、排気冷却部材１０の詳細構成について説明する。
図２及び図３は、排気冷却部材１０の構成を説明するための図である。図４は、排気冷却部材１０での排気ガス及び空気の流れを説明するための模式図である。なお、図４では、排気ガスの流れが破線の矢印で示され、空気の流れが一点鎖線の矢印で示されている。 Next, a detailed configuration of the exhaust cooling member 10 will be described with reference to FIGS.
2 and 3 are views for explaining the configuration of the exhaust cooling member 10. FIG. 4 is a schematic diagram for explaining the flow of exhaust gas and air in the exhaust cooling member 10. In addition, in FIG. 4, the flow of exhaust gas is shown by a dashed arrow, and the flow of air is shown by a dashed-dotted arrow.

排気冷却部材１０は、図２及び図３に示すように、本体部２０と、固定部３０と、流入部４０と、流出部５０とを有する。
本体部２０は、筒状に形成されている。本体部２０の一端側は、図３に示すように、固定部３０を介して排気管３と連結されている。本体部２０の他端側は、大気に連通する開口となっている。本体部２０の内部には、図２に示すように、空洞部２１が形成されている。 As shown in FIGS. 2 and 3, the exhaust cooling member 10 has a main body portion 20, a fixing portion 30, an inflow portion 40, and an outflow portion 50.
The main body 20 is formed in a tubular shape. As shown in FIG. 3, one end of the main body portion 20 is connected to the exhaust pipe 3 via the fixing portion 30. The other end of the body portion 20 is an opening that communicates with the atmosphere. Inside the main body 20, as shown in FIG. 2, a cavity 21 is formed.

空洞部２１は、本体部２０の軸方向に沿って形成された空間である。空洞部２１には、排気管３の後端部４を通過した排気ガスが流れる。具体的には、本体部２０の一端側から排気ガスが流入し、本体部２０の他端側から排気ガスが流出する。空洞部２１内には流入部４０から空気が流入し、空気が排気ガスと混合することで排気ガスの温度が低くなる（冷却される）。空洞部２１は、本体部２０の一端側から他端側へ向かうにつれて広くなっている。これにより、空洞部２１を流れる排気ガスの流速が次第に遅くなり、かつ拡散するように流出する。 The cavity 21 is a space formed along the axial direction of the main body 20. The exhaust gas that has passed through the rear end portion 4 of the exhaust pipe 3 flows through the hollow portion 21. Specifically, the exhaust gas flows in from one end side of the body portion 20, and the exhaust gas flows out from the other end side of the body portion 20. Air flows into the hollow portion 21 from the inflow portion 40, and the air is mixed with the exhaust gas, so that the temperature of the exhaust gas is lowered (cooled). The cavity 21 is wider from one end of the main body 20 toward the other end. As a result, the flow velocity of the exhaust gas flowing through the cavity 21 gradually decreases and flows out so as to diffuse.

本体部２０は、本実施形態では、図２に示すように上分割体２２と下分割体２４で上下に２分割されている。すなわち、上分割体２２と下分割体２４が合わさって、本体部２０が構成されている。 In this embodiment, the main body 20 is vertically divided into two parts by an upper divided body 22 and a lower divided body 24 as shown in FIG. That is, the upper divided body 22 and the lower divided body 24 are combined to form the main body portion 20.

上分割体２２は、図４に示すように本体部２０の上側を形成し、下分割体２４は本体部２０の下側を形成している。上分割体２２は、図２に示すように、本体部２０の上壁と両側壁の一部とを成し、下分割体２４は、本体部２０の下壁と両側壁の一部とを成している。上分割体２２は、図２に示すように、下分割体２４を上から覆うような大きさに形成されている。 The upper divided body 22 forms the upper side of the main body 20 as shown in FIG. 4, and the lower divided body 24 forms the lower side of the main body 20. As shown in FIG. 2, the upper divided body 22 forms an upper wall of the main body 20 and a part of both side walls, and the lower divided body 24 forms a lower wall of the main body 20 and a part of both side walls. Is made. As shown in FIG. 2, the upper divided body 22 is formed in a size that covers the lower divided body 24 from above.

下分割体２４は、上分割体２２よりも短く形成されている。具体的には、上分割体２２は、図３に示すように、本体部２０の他端側において下分割体２４よりも外方へ延在している。すなわち、上分割体２２の端部２２ａは、排気ガスの流れ方向において下分割体２４の端部２４ａよりも外方に位置している。このため、下分割体２４の端部２４ａの周囲から更に空気が流入して、排気ガスと混合する。具体的には、上分割体２２の両側壁及び上壁で囲まれた空間（図２参照）に、端部２４ａの周囲から空気が流入し、当該空間にて空気が排気ガスと混合することで、排気ガスが更に冷却される。また、下分割体２４が上分割体２２よりも短いことによって、本体部２０を軽量化することができる。 The lower divided body 24 is formed shorter than the upper divided body 22. Specifically, as shown in FIG. 3, the upper divided body 22 extends outward from the lower divided body 24 on the other end side of the main body portion 20. That is, the end portion 22a of the upper divided body 22 is located outside the end portion 24a of the lower divided body 24 in the flow direction of the exhaust gas. Therefore, air further flows in from the periphery of the end 24a of the lower divided body 24 and mixes with the exhaust gas. Specifically, air flows into the space surrounded by both side walls and the upper wall of the upper divided body 22 (see FIG. 2) from around the end portion 24a, and the air is mixed with the exhaust gas in the space. Then, the exhaust gas is further cooled. Further, since the lower divided body 24 is shorter than the upper divided body 22, the weight of the main body portion 20 can be reduced.

上分割体２２の横幅は、図３に示すように、一端側から他端側に向かうにつれて大きくなっている。具体的には、上分割体２２の両側壁の他端側は、下分割体２４の両側壁よりも外側に位置している。これにより、下分割体２４の端部２４ａの周囲から流入する空気の量が増えて、排気ガスをより効果的に冷却できる。 As shown in FIG. 3, the lateral width of the upper divided body 22 increases from the one end side toward the other end side. Specifically, the other end sides of the both side walls of the upper divided body 22 are located outside the both side walls of the lower divided body 24. As a result, the amount of air flowing in from the periphery of the end 24a of the lower divided body 24 increases, and the exhaust gas can be cooled more effectively.

固定部３０は、図３に示すように、本体部２０を排気管３の後端部４に連結する部分である。固定部３０は、管状に形成されている。固定部３０の軸方向の一端部３２が、後端部４に固定されている。固定部３０の内径は、後端部４の外径とほぼ同じ大きさであるため、一端部３２と後端部４の間に隙間は無い。 As shown in FIG. 3, the fixing portion 30 is a portion that connects the main body portion 20 to the rear end portion 4 of the exhaust pipe 3. The fixed part 30 is formed in a tubular shape. One end portion 32 of the fixed portion 30 in the axial direction is fixed to the rear end portion 4. Since the inner diameter of the fixed portion 30 is substantially the same as the outer diameter of the rear end portion 4, there is no gap between the one end portion 32 and the rear end portion 4.

固定部３０は、本体部２０に板状のブラケット３２ａ、３２ｂ、３２ｃを介して連結されている。具体的には、固定部３０は、上分割体２２の外周面にブラケット３２ａによって固定されている。また、固定部３０は、下分割体２４の外周面にブラケット３２ｂ、３２ｃによって固定されている。ブラケット３２ａ、３２ｂ、３２ｃは、固定部３０から見て放射状に設けられている。 The fixed portion 30 is connected to the main body portion 20 via plate-shaped brackets 32a, 32b, 32c. Specifically, the fixing portion 30 is fixed to the outer peripheral surface of the upper divided body 22 by a bracket 32a. Further, the fixed portion 30 is fixed to the outer peripheral surface of the lower divided body 24 by brackets 32b and 32c. The brackets 32a, 32b, 32c are provided radially when viewed from the fixed portion 30.

流入部４０は、図３に示すように本体部２０の軸方向の一端側に設けられ、空洞部２１内に空気を流入させる（図４参照）。流入部４０は、本体部２０の内径が固定部３０の外径よりも大きい大径部４１に設けられている。大径部４１の端には、開口４２（図４）が形成されている。そして、開口４２のうち固定部３０の周囲の領域が、流入部４０となっている。本体部２０の周囲の空気が、流入部４０を介して空洞部２１内に流入する。空洞部２１内へ流入した空気は、空洞部２１内を流れる排気ガスと混合して、排気ガスの温度を下げる（冷却する）。 As shown in FIG. 3, the inflow portion 40 is provided at one end side in the axial direction of the main body portion 20 and allows air to flow into the hollow portion 21 (see FIG. 4 ). The inflow portion 40 is provided in the large diameter portion 41 in which the inner diameter of the main body portion 20 is larger than the outer diameter of the fixed portion 30. An opening 42 (FIG. 4) is formed at the end of the large diameter portion 41. The area around the fixed portion 30 in the opening 42 serves as the inflow portion 40. Air around the main body 20 flows into the cavity 21 via the inflow portion 40. The air flowing into the cavity 21 mixes with the exhaust gas flowing in the cavity 21 and lowers (cools) the temperature of the exhaust gas.

流出部５０は、図３に示すように本体部２０の軸方向の他端側に設けられ、空洞部２１内を流れる排気ガス及び空気を流出させる（図４参照）。流出部５０には、排気ガスが通過する流出口５２（図３）が形成されている。空洞部２１内で混合した排気ガス及び空気は、流出口５２から大気へ流出する。 The outflow portion 50 is provided on the other end side in the axial direction of the main body portion 20 as shown in FIG. 3, and allows the exhaust gas and the air flowing in the hollow portion 21 to flow out (see FIG. 4 ). The outflow portion 50 is formed with an outlet 52 (FIG. 3) through which exhaust gas passes. The exhaust gas and the air mixed in the cavity 21 flow out to the atmosphere through the outlet 52.

本実施形態において、本体部２０は、真っ直ぐに形成されておらず、図４に示すように、上分割体２２と下分割体２４のうちの上分割体２２の他端側が下方を向くように形成されている。具体的には、上分割体２２の上壁の他端側が下方を向くように、上壁を曲げている。これにより、流出口５２も下方を向くことになり、空洞部２１を流れる排気ガスが、流出口５２を介して下方へ向かって流出する。 In the present embodiment, the main body portion 20 is not formed straight, and as shown in FIG. 4, the other end side of the upper divided body 22 of the upper divided body 22 and the lower divided body 24 faces downward. Has been formed. Specifically, the upper wall is bent so that the other end side of the upper wall of the upper divided body 22 faces downward. As a result, the outlet 52 also faces downward, and the exhaust gas flowing through the hollow portion 21 flows out downward via the outlet 52.

また、図３に示すように、上分割体２２の横幅は、一端側から他端側へ向かうにつれて大きくなっている。すなわち、上分割体２２の流出部５０側の幅が、上分割体２２の流入部４０側の幅よりも大きくなっている。これにより、排気ガスが、上分割体２２によって下方の広範囲に拡散されやすくなる。なお、図３では、流入部４０と流出部５０の間の絞っている部分から流出部５０に向かって幅が大きくなっているが、これに限定されない。例えば、上記の絞っている部分がなく、流入部４０から流出部５０へ向かって幅が大きくなってもよい。 Further, as shown in FIG. 3, the lateral width of the upper divided body 22 increases from one end side toward the other end side. That is, the width of the upper divided body 22 on the outflow portion 50 side is larger than the width of the upper divided body 22 on the inflow portion 40 side. As a result, the exhaust gas is easily diffused by the upper split body 22 in a wide area below. In FIG. 3, the width increases from the narrowed portion between the inflow portion 40 and the outflow portion 50 toward the outflow portion 50, but is not limited to this. For example, the width may increase from the inflow portion 40 toward the outflow portion 50 without the above-mentioned narrowed portion.

上記では、本体部２０の上分割体２２を下方へ向かうように曲げていることで、本体部２０全体を斜めに配置する場合に比べて、上下方向における本体部２０の設置スペースを小さくできる（図１参照）。 In the above, since the upper divided body 22 of the main body 20 is bent downward, the installation space of the main body 20 in the vertical direction can be made smaller than in the case where the entire main body 20 is obliquely arranged ( (See FIG. 1).

＜排気冷却部材１０での排気ガス及び空気の流れについて＞
上述した構成の排気冷却部材１０での排気ガス及び空気の流れについて、図４を参照しながら説明する。 <Regarding the flow of exhaust gas and air in the exhaust cooling member 10>
The flow of exhaust gas and air in the exhaust cooling member 10 having the above-described configuration will be described with reference to FIG.

排気管３を流れる排気ガスは、排気管３の後端部４に連結された排気冷却部材１０の空洞部２１に流入する。一方で、排気冷却部材１０の周囲の空気は、空洞部２１内の負圧によって引き込まれるように、流入部４０から空洞部２１に流入する。空洞部２１に流入した空気が排気ガスと混合することで、排気ガスが冷却される（１度目の冷却）。 The exhaust gas flowing through the exhaust pipe 3 flows into the cavity 21 of the exhaust cooling member 10 connected to the rear end portion 4 of the exhaust pipe 3. On the other hand, the air around the exhaust cooling member 10 flows into the hollow portion 21 from the inflow portion 40 so as to be drawn in by the negative pressure in the hollow portion 21. The exhaust gas is cooled by mixing the air flowing into the cavity 21 with the exhaust gas (first cooling).

流入部４０から流入した空気で冷却された排気ガスは、下分割体２４の端部２４ａから流入する空気と混合することで、更に冷却される（２度目の冷却）。その後、排気ガス及び空気は、流出部５０から下方へ向かって拡散するように流出する。 The exhaust gas cooled by the air flowing in from the inflow portion 40 is further cooled by being mixed with the air flowing in from the end portion 24a of the lower split body 24 (second cooling). After that, the exhaust gas and the air flow out from the outflow portion 50 so as to diffuse downward.

＜本実施形態における効果＞
上述した実施形態の排気冷却部材１０は、排気ガスが流れる空洞部２１が形成された本体部２０と、本体部２０の一端側に設けられ空気が流入する流入部４０と、本体部２０の他端側に設けられ排気ガス及び空気が流出する流出口５２が形成された流出部５０とを有する。そして、本体部２０の上分割体２２（上壁）は、他端側において下分割体２４（下壁）よりも外方へ延在している。すなわち、上分割体２２の端部２２ａは、下分割体２４の端部２４ａよりも外方に位置している。
これにより、排気冷却部材１０に対して流入部４０から空気が流入するのに加えて、下分割体２４の端部２４ａの周囲からの空気が流入するので、空洞部２１内に多量の空気が流入する（取り込まれる）。この結果、排気ガスが、多量の空気と混合した後に、上分割体２２の端部２２ａから流出することになる。すなわち、排気ガスが、排気冷却部材１０から流出する前に効果的に冷却される。 <Effects of this embodiment>
The exhaust cooling member 10 of the above-described embodiment includes a main body portion 20 in which a cavity portion 21 through which exhaust gas flows is formed, an inflow portion 40 provided on one end side of the main body portion 20 for inflowing air, and another main body portion 20. And an outflow portion 50 provided with an outflow port 52 which is provided on the end side and through which exhaust gas and air flow out. The upper divided body 22 (upper wall) of the main body 20 extends outward than the lower divided body 24 (lower wall) at the other end side. That is, the end 22 a of the upper divided body 22 is located outside the end 24 a of the lower divided body 24.
As a result, in addition to the air flowing into the exhaust cooling member 10 from the inflow portion 40, the air from around the end portion 24a of the lower split body 24 flows in, so that a large amount of air is introduced into the cavity portion 21. Inflow (taken in). As a result, the exhaust gas mixes with a large amount of air and then flows out from the end 22a of the upper divided body 22. That is, the exhaust gas is effectively cooled before flowing out from the exhaust cooling member 10.

なお、上記では、上分割体２２が下分割体２４よりも他端側において外方へ延在していることとしたが、これに限定されない。例えば、下分割体２４が上分割体２２よりも他端側において外方へ延在していることとしてもよい。この場合にも、上分割体２２の端部２２ａの周囲から空気が流入するので、空洞部２１内に多量の空気が流入する。そして、排気ガスは、多量の空気で冷却された後に下分割体２４の端部２４ａから流出される。すなわち、本体部２０の上分割体２２（上壁）及び下分割体２４（下壁）のうちの一方が、他端側において他方よりも外方へ延在していれば、排気ガスを効果的に冷却できる効果が奏される。 In the above description, the upper divided body 22 is extended outward at the other end side than the lower divided body 24, but it is not limited to this. For example, the lower divided body 24 may extend outward on the other end side than the upper divided body 22. Also in this case, since air flows in from around the end portion 22a of the upper divided body 22, a large amount of air flows in the cavity portion 21. Then, the exhaust gas is cooled by a large amount of air and then flows out from the end portion 24a of the lower divided body 24. That is, if one of the upper divided body 22 (upper wall) and the lower divided body 24 (lower wall) of the main body portion 20 extends outward more than the other at the other end side, the exhaust gas is effective. The effect that it can be cooled effectively is exhibited.

また、上記では、上分割体２２の他端側が下方へ向かって曲がっていることとしたが、これに限定されない。例えば、上分割体２２の他端側が、真っ直ぐに形成されていてもよい。 Further, in the above description, the other end side of the upper divided body 22 is bent downward, but the invention is not limited to this. For example, the other end side of the upper divided body 22 may be formed straight.

以上、本発明を実施の形態を用いて説明したが、本発明の技術的範囲は上記実施の形態に記載の範囲には限定されず、その要旨の範囲内で種々の変形及び変更が可能である。例えば、装置の分散・統合の具体的な実施の形態は、以上の実施の形態に限られず、その全部又は一部について、任意の単位で機能的又は物理的に分散・統合して構成することができる。また、複数の実施の形態の任意の組み合わせによって生じる新たな実施の形態も、本発明の実施の形態に含まれる。組み合わせによって生じる新たな実施の形態の効果は、もとの実施の形態の効果を合わせ持つ。 Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist thereof. is there. For example, the specific embodiment of device distribution/integration is not limited to the above embodiment, and all or part of the device may be functionally or physically distributed/integrated in arbitrary units. You can Further, a new embodiment that occurs due to an arbitrary combination of a plurality of embodiments is also included in the embodiment of the present invention. The effect of the new embodiment produced by the combination also has the effect of the original embodiment.

３ 排気管
４ 後端部
１０ 排気冷却部材
２０ 本体部
２１ 空洞部
２２ 上分割体
２４ 下分割体
４０ 流入部
５０ 流出部
５２ 流出口

3 Exhaust Pipe 4 Rear End 10 Exhaust Cooling Member 20 Main Body 21 Cavity 22 Upper Divided Body 24 Lower Divided Body 40 Inlet 50 Outlet 52 Outlet

Claims (4)

排気管の端部に取り付けられ、排気ガスを冷却する排気冷却部材であって、
前記排気ガスが流れる空洞部が形成された本体部と、
前記本体部の前記排気管と連結される一端側に設けられ、空気を前記空洞部に流入させる流入部と、
前記本体部の他端側に設けられ、前記排気ガス及び前記空気が流出する流出口が形成された流出部と、
を備え、
前記本体部の上壁及び下壁のうちの一方は、前記他端側において他方よりも外方へ延在している、排気冷却部材。 An exhaust cooling member attached to the end of the exhaust pipe to cool the exhaust gas,
A main body formed with a cavity through which the exhaust gas flows,
An inflow section provided on one end side of the main body section connected to the exhaust pipe, for allowing air to flow into the cavity section;
An outflow portion provided on the other end side of the main body portion, in which an outflow port through which the exhaust gas and the air flow out is formed,
Equipped with
One of the upper wall and the lower wall of the main body portion is an exhaust cooling member that extends outward more than the other at the other end side. 前記本体部の前記上壁の端部が、前記他端側において前記下壁の端部よりも外方に位置している、
請求項１に記載の排気冷却部材。 An end of the upper wall of the main body is located outside the end of the lower wall on the other end side.
The exhaust cooling member according to claim 1. 前記本体部は、前記上壁を成す上分割体と、前記下壁を成す下分割体とを含み、
前記上分割体は、前記下分割体を覆っている、
請求項２に記載の排気冷却部材。 The main body includes an upper divided body forming the upper wall and a lower divided body forming the lower wall,
The upper divided body covers the lower divided body,
The exhaust cooling member according to claim 2. 前記上分割体の横幅は、前記一端側から前記他端側へ向かうにつれて大きくなっている、
請求項２又は３に記載の排気冷却部材。

The lateral width of the upper divided body is increased from the one end side toward the other end side,
The exhaust cooling member according to claim 2 or 3.

JP2019009573A 2019-01-23 2019-01-23 Exhaust gas cooling member Pending JP2020118086A (en)

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PCT/JP2020/000561 WO2020153142A1 (en) 2019-01-23 2020-01-10 Exhaust cooling member

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JPS50138411U (en) * 1974-05-01 1975-11-14
JPH04127833U (en) * 1991-05-14 1992-11-20 三菱自動車工業株式会社 exhaust system
JP2008291685A (en) * 2007-05-23 2008-12-04 Mitsubishi Fuso Truck & Bus Corp Exhaust pipe structure
JP2009068422A (en) * 2007-09-13 2009-04-02 Kubota Corp Engine exhaust structure of work machine
JP2010127177A (en) * 2008-11-27 2010-06-10 Matsu Shou:Kk Interconnection structure of muffler tail and muffler tail
JP5829995B2 (en) * 2012-10-03 2015-12-09 トヨタ自動車株式会社 Exhaust system members
JP6047479B2 (en) * 2013-12-16 2016-12-21 日立建機株式会社 Exhaust equipment for construction machinery
JP2017180166A (en) * 2016-03-29 2017-10-05 いすゞ自動車株式会社 Cooling device

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