WO2017191677A1 - Silencer - Google Patents

Silencer Download PDF

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Publication number
WO2017191677A1
WO2017191677A1 PCT/JP2016/063588 JP2016063588W WO2017191677A1 WO 2017191677 A1 WO2017191677 A1 WO 2017191677A1 JP 2016063588 W JP2016063588 W JP 2016063588W WO 2017191677 A1 WO2017191677 A1 WO 2017191677A1
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WO
WIPO (PCT)
Prior art keywords
exhaust
exhaust pipe
downstream end
silencer
housing
Prior art date
Application number
PCT/JP2016/063588
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French (fr)
Japanese (ja)
Inventor
謙一 竹村
英行 森井
Original Assignee
フタバ産業株式会社
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Publication date
Application filed by フタバ産業株式会社 filed Critical フタバ産業株式会社
Priority to JP2018515378A priority Critical patent/JPWO2017191677A1/en
Priority to PCT/JP2016/063588 priority patent/WO2017191677A1/en
Publication of WO2017191677A1 publication Critical patent/WO2017191677A1/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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • 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

Definitions

  • This disclosure relates to a vehicle silencer.
  • the vehicle exhaust system suppresses noise caused by exhaust gas discharged from the internal combustion engine by a silencer provided in the exhaust passage.
  • condensed water is generated when exhaust gas is cooled in the exhaust passage.
  • the generated condensed water is usually discharged to the outside of the vehicle together with the exhaust gas.
  • a silencer has been proposed in which a wall for blocking condensed water is provided in an exhaust pipe that is located upstream of the casing of the silencer and connected to the upstream side of the casing (see Patent Document 1). .
  • Patent Document 1 Since the wall disclosed in Patent Document 1 described above is configured to block condensed water in the exhaust pipe, the cross-sectional area of the exhaust flow path of the exhaust pipe decreases and the pressure loss of the exhaust flow path increases. There was a problem that.
  • One aspect of the present disclosure is preferably a silencer that makes it difficult for pressure loss in the exhaust flow path to increase and can easily prevent the backflow of condensed water.
  • a silencer which includes a housing and an exhaust pipe.
  • the exhaust pipe is located upstream of the casing, forms an exhaust passage for guiding exhaust gas to the casing, and has a cylindrical shape.
  • the downstream end of the exhaust pipe is straight and protrudes into the housing.
  • the downstream end of the exhaust pipe has an inclined opening that opens along a plane that is inclined with respect to a plane perpendicular to the central axis of the downstream end of the exhaust pipe, and a shielding part that blocks the exhaust flow path.
  • the inclined opening is located above the shielding part in the vertical direction.
  • the exhaust gas flowing through the exhaust passage of the exhaust pipe is discharged from the inclined opening portion to the inside of the housing, and the condensed water generated inside the housing is less likely to flow backward by the shielding portion. . Therefore, since the inclined opening is inclined and opened with respect to the plane perpendicular to the central axis of the downstream end of the exhaust pipe, the pressure loss of the exhaust passage is unlikely to increase, and the backflow of condensed water can be easily prevented. It is possible to provide a muffler that can be used.
  • the opening area of the inclined opening may be greater than or equal to the cross-sectional area of the exhaust passage of the exhaust pipe. According to such a configuration, it is possible to provide a muffler device in which the pressure loss in the exhaust passage is unlikely to increase.
  • the central axis of the downstream end portion of the exhaust pipe may be perpendicular to the vertical direction.
  • the shielding portion may have a shape along a plane inclined with respect to a plane perpendicular to the central axis of the downstream end portion of the exhaust pipe. According to such a configuration, the exhaust gas flowing through the exhaust passage of the exhaust pipe is guided to the inclined opening along the inclined surface of the shielding portion. As a result, it is possible to provide a silencer that is unlikely to increase the pressure loss in the exhaust passage.
  • the exhaust pipe may include an exhaust member and a shielding plate.
  • the downstream end of the exhaust pipe may include a downstream end of the exhaust member and a shielding plate.
  • the inclined opening may be an opening at the downstream end of the exhaust member.
  • the shielding plate may be a shielding portion, and may be fixed to the downstream end portion of the exhaust member by welding. According to such a configuration, since the shielding portion is configured by welding the shielding plate to the downstream end portion of the exhaust member, the pressure loss of the exhaust passage is unlikely to increase due to the simple configuration, and the condensed water Therefore, it is possible to provide a silencer that can easily prevent backflow.
  • FIG. 1 is an overall view showing a configuration of an exhaust system. It is sectional drawing which shows the structure of an exhaust pipe and a housing
  • the exhaust system 100 constitutes a part of an exhaust passage of exhaust gas discharged from an internal combustion engine of an automobile.
  • the exhaust system 100 includes a catalytic converter 1, an exhaust pipe 2, a housing 3, and an exhaust pipe 4.
  • the exhaust gas discharged from the internal combustion engine is introduced into the catalytic converter 1.
  • a catalyst (not shown) is accommodated in the catalytic converter 1.
  • the catalyst purifies the exhaust gas introduced into the catalytic converter 1.
  • An exhaust sensor is provided upstream of the catalyst of the catalytic converter 1.
  • the exhaust pipe 2 forms an exhaust passage downstream of the catalytic converter 1.
  • the exhaust pipe 2 is inserted through a through hole opened in a portion on the upstream side of the housing 3. More specifically, as shown in FIGS. 2 and 3, the end 20, which is the downstream end of the exhaust pipe 2, is inserted through the through hole into the housing 3 in a state protruding from the upstream side. Yes.
  • the exhaust pipe 2 includes an exhaust member 21 and a shielding plate 22. A detailed description of the end portion 20, the exhaust member 21, and the shielding plate 22 will be described later.
  • the housing 3 has an elliptic cylinder shape and forms an exhaust passage downstream of the exhaust pipe 2.
  • the housing 3 has a function of reducing exhaust noise. Note that the detailed internal configuration of the housing 3 is omitted in FIGS. 2 and 4.
  • the exhaust pipe 4 is a cylindrical pipe that forms an exhaust passage downstream of the housing 3.
  • the exhaust pipe 4 is inserted through a through hole opened in a downstream portion of the housing 3. More specifically, the upstream side of the exhaust pipe 4 is inserted into the housing 3 in a state of protruding from the downstream side.
  • the exhaust member 21 is a cylindrical pipe.
  • the shielding plate 22 is a separate plate material from the exhaust member 21.
  • the shielding plate 22 is fixed to the exhaust member 21 by welding and closes a part of the exhaust passage of the exhaust member 21, in other words, a part of the exhaust passage of the exhaust pipe 2. That is, the exhaust pipe 2 is configured by fixing the shielding plate 22 to the exhaust member 21.
  • the end portion 20 is a portion of the downstream end portion of the exhaust pipe 2, and is constituted by the downstream end portion of the exhaust member 21 and the shielding plate 22.
  • the end 20 is inserted into the housing 3 in a state of protruding from the upstream side.
  • the central axis X of the end 20 is perpendicular to the vertical direction.
  • the end 20 is linear, and the tip of the end 20 protrudes in a V shape toward the downstream side when viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction.
  • the V-shaped portion of the end portion 20 is formed by cutting one end of the exhaust member 21 so as to protrude in a V shape when viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction. Part.
  • the apex of the V-shaped portion viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction is located on the central axis X.
  • the V-shaped part includes a plane inclined with respect to a plane perpendicular to the central axis X in the opening 20A to be described later, across a virtual plane perpendicular to the vertical direction passing through the central axis X, and This is a portion where one end of the exhaust member 21 is cut along a plane that is symmetrical to the inclined plane. That is, the V-shaped portion described above has a symmetrical shape with respect to the central axis X when viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction.
  • the end 20 has an opening 20A and a shielding part 20B.
  • the opening 20 ⁇ / b> A opens along the plane inclined with respect to the plane perpendicular to the central axis X so as to face upward in the vertical direction.
  • the opening 20A is an opening on the upper side in the vertical direction from the central axis X in the V-shaped portion described above.
  • the cutting position at one end of the exhaust member 21 described above is such that the opening area of the opening 20A is equal to the opening of the exhaust member 21, in other words, the cross-sectional area of the exhaust passage in the unprocessed portion of the end portion 20. Is set to The opening 20A is located above the shielding part 20B in the vertical direction.
  • the shielding part 20B is a part of the V-shaped part mentioned above that blocks the opening below the central axis X in the vertical direction, in other words, a part that blocks the exhaust flow path of the exhaust pipe 2. That is, the shielding part 20 ⁇ / b> B in the present embodiment refers to the shielding plate 22.
  • the shielding part 20B has a shape along a plane inclined with respect to a plane perpendicular to the central axis X, and the outer surface of the shielding part 20B faces downward in the vertical direction.
  • the lower side of the exhaust member 21 in the vertical direction than the central axis X is shielded by the shielding plate 22.
  • the straight exhaust pipe 2 is assembled to the casing 3 perpendicularly to the vertical direction, that is, horizontally, the condensed water hardly flows back until reaching the line of the central axis X as shown in FIG.
  • the exhaust pipe into the casing with the central axis of the end of the exhaust pipe inclined in the vertical direction Compared to the above, it is possible to provide a silencer that can be easily assembled.
  • the shielding part 20B has a shape tilted upward in the vertical direction with respect to the plane perpendicular to the central axis X. For this reason, compared with the case where the shielding plate along the plane perpendicular to the central axis X is fixed to the housing, the exhaust gas flows smoothly through the exhaust passage of the exhaust pipe 2. That is, for example, it is assumed that an exhaust pipe different from the exhaust pipe 2 on the lower side in the vertical direction of the downstream end is assembled to the housing. Specifically, on the lower side in the vertical direction of the exhaust member constituting the exhaust pipe, the point perpendicular to the central axis of the downstream end portion of the exhaust member is blocked by the shielding plate. Different.
  • the downstream of the exhaust pipe is shielded without an inclined opening.
  • the exhaust gas flowing in the vicinity of the lower side in the vertical direction in the exhaust passage of the exhaust pipe is likely to stagnate near the boundary between the exhaust member and the shielding plate, and does not flow smoothly.
  • the shielding portion 20B is inclined upward in the vertical direction, the exhaust gas flowing through the exhaust passage of the exhaust pipe 2 flows along the shielding portion 20B, in other words, the inner surface of the shielding plate 22. It is easy to be guided to the opening 20A. For this reason, the exhaust gas flows smoothly through the exhaust passage of the exhaust pipe 2.
  • the V-shaped portion of the end portion 20 viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction has a vertex on the central axis X, and the central axis X is A configuration in which the opening 20A and the shielding portion 20B are symmetrical with respect to each other is illustrated.
  • the shape of the end of the exhaust pipe is not limited to this.
  • the shape of the end portion of the exhaust pipe viewed from the direction perpendicular to the central axis and perpendicular to the vertical direction is not on the central axis of the end portion, in other words, when viewed from the above-described direction, An asymmetrical exhaust pipe may be used between the opening and the shield.
  • the configuration in which the opening area of the opening 20A is equal to the cross-sectional area of the unprocessed portion of the end portion 20 is illustrated.
  • the configuration of the exhaust pipe is not limited to this.
  • the opening of the exhaust pipe may be set to be different from the cross-sectional area of the unprocessed portion of the exhaust passage.
  • the exhaust pipe 2 configured by the shielding member 22 being fixed to the exhaust member 21 is exemplified, but the configuration of the exhaust pipe is not limited to this.
  • the exhaust pipe may include other components in addition to the exhaust member and the shielding plate.
  • the configuration of the exhaust pipe is not limited to this.
  • the shielding portion may be provided on the exhaust member by deforming the end of the exhaust pipe. By doing so, the labor of welding the shielding plate can be saved, and the exhaust pipe can be formed with a simpler configuration.
  • the oval cylindrical housing 3 is illustrated, but the shape of the housing is not limited to this.
  • the casing may have a true cylindrical shape, a square cylindrical shape, or a clamshell 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)

Abstract

A silencer is provided with a casing and an exhaust pipe. The exhaust pipe is positioned upstream of the casing, forms an exhaust flow path to guide exhaust gas to the casing, and is cylindrical. The downstream end part of the exhaust pipe is linear, and protrudes to the inside of the casing. Moreover, the downstream end part of the exhaust pipe has: an inclined opening that opens along a surface that is inclined with respect to a surface that is perpendicular to the center axis of the downstream end part of the exhaust pipe; and a shielding part for blocking the exhaust flow path. Furthermore, the inclined opening is positioned at the top side of the shielding part in the perpendicular direction.

Description

消音装置Silencer
　本開示は、車両の消音装置に関する。 This disclosure relates to a vehicle silencer.
　車両の排気システムは、排気流路に設けられた消音装置により、内燃機関から排出された排ガスによる騒音を抑制する。この種の消音装置には、排気流路において排ガスが冷却されると、凝縮水が発生する。発生した凝縮水は、通常、排ガスとともに車両の外部へ排出される。ところが、車両が前傾姿勢で走行又は停車している場合などに、凝縮水が、車両の外部へ排出されず消音装置の上流に逆流してしまう問題があった。そこで、消音装置の筐体の上流に位置し、当該筐体の上流側に接続されている排気管内に、凝縮水をせき止める壁が設けられた消音装置が提案されている（特許文献１参照）。 The vehicle exhaust system suppresses noise caused by exhaust gas discharged from the internal combustion engine by a silencer provided in the exhaust passage. In this type of silencer, condensed water is generated when exhaust gas is cooled in the exhaust passage. The generated condensed water is usually discharged to the outside of the vehicle together with the exhaust gas. However, when the vehicle is traveling or stopped in a forward leaning posture, there is a problem that the condensed water flows back upstream of the silencer without being discharged to the outside of the vehicle. Therefore, a silencer has been proposed in which a wall for blocking condensed water is provided in an exhaust pipe that is located upstream of the casing of the silencer and connected to the upstream side of the casing (see Patent Document 1). .
特開２００６－２２６１４５号公報JP 2006-226145 A
　ところが、前述した特許文献１に開示されている壁は、排気管内で凝縮水をせき止める構成であるため、排気管の排気流路の断面積が減少し、排気流路の圧力損失が上昇してしまうという問題があった。 However, since the wall disclosed in Patent Document 1 described above is configured to block condensed water in the exhaust pipe, the cross-sectional area of the exhaust flow path of the exhaust pipe decreases and the pressure loss of the exhaust flow path increases. There was a problem that.
　本開示の一局面は、排気流路の圧力損失が上昇しにくく、凝縮水の逆流を防ぎやすくすることのできる消音装置が好ましい。 One aspect of the present disclosure is preferably a silencer that makes it difficult for pressure loss in the exhaust flow path to increase and can easily prevent the backflow of condensed water.
　本開示の一態様は、消音装置であって、筐体と、排気管と、を備える。排気管は、筐体の上流に位置し、筐体へと排ガスを導く排気流路を形成し、円筒状である。排気管の下流端部は、直線状であり、筐体の内部に突出している。また、排気管の下流端部は、排気管の下流端部の中心軸と垂直な面に対して傾いた面に沿って開口している傾斜開口部と、排気流路を塞ぐ遮蔽部とを有している。そして、傾斜開口部は、鉛直方向において遮蔽部の上側に位置している。 One aspect of the present disclosure is a silencer, which includes a housing and an exhaust pipe. The exhaust pipe is located upstream of the casing, forms an exhaust passage for guiding exhaust gas to the casing, and has a cylindrical shape. The downstream end of the exhaust pipe is straight and protrudes into the housing. Further, the downstream end of the exhaust pipe has an inclined opening that opens along a plane that is inclined with respect to a plane perpendicular to the central axis of the downstream end of the exhaust pipe, and a shielding part that blocks the exhaust flow path. Have. The inclined opening is located above the shielding part in the vertical direction.
　このような構成によれば、排気管の排気流路を流れる排ガスは、傾斜開口部から筐体の内部へと排出され、筐体の内部に発生した凝縮水は、遮蔽部によって逆流しにくくなる。よって、傾斜開口部が排気管の下流端部の中心軸と垂直な面に対して傾斜して開口しているため排気流路の圧力損失が上昇しにくく、凝縮水の逆流を防ぎやすくすることのできる消音装置の提供が可能となる。 According to such a configuration, the exhaust gas flowing through the exhaust passage of the exhaust pipe is discharged from the inclined opening portion to the inside of the housing, and the condensed water generated inside the housing is less likely to flow backward by the shielding portion. . Therefore, since the inclined opening is inclined and opened with respect to the plane perpendicular to the central axis of the downstream end of the exhaust pipe, the pressure loss of the exhaust passage is unlikely to increase, and the backflow of condensed water can be easily prevented. It is possible to provide a muffler that can be used.
　本開示の一態様は、傾斜開口部の開口面積が、排気管の排気流路の断面積以上であってもよい。このような構成によれば、排気流路の圧力損失が上昇しにくい消音装置の提供が可能となる。 In one aspect of the present disclosure, the opening area of the inclined opening may be greater than or equal to the cross-sectional area of the exhaust passage of the exhaust pipe. According to such a configuration, it is possible to provide a muffler device in which the pressure loss in the exhaust passage is unlikely to increase.
　本開示の一態様は、排気管の下流端部の中心軸が、鉛直方向に垂直であってもよい。
　本開示の一態様は、遮蔽部が、排気管の下流端部の中心軸と垂直な面に対して傾いた面に沿った形状であってもよい。このような構成によれば、排気管の排気流路を流れる排ガスが、遮蔽部の傾いた面に沿って傾斜開口部へ導かれる。その結果、排気流路の圧力損失が上昇しにくい消音装置の提供が可能となる。 In one aspect of the present disclosure, the central axis of the downstream end portion of the exhaust pipe may be perpendicular to the vertical direction.
According to one aspect of the present disclosure, the shielding portion may have a shape along a plane inclined with respect to a plane perpendicular to the central axis of the downstream end portion of the exhaust pipe. According to such a configuration, the exhaust gas flowing through the exhaust passage of the exhaust pipe is guided to the inclined opening along the inclined surface of the shielding portion. As a result, it is possible to provide a silencer that is unlikely to increase the pressure loss in the exhaust passage.
　本開示の一態様は、排気管が、排気部材と、遮蔽板と、を備えていてもよい。そして、排気管の下流端部は、排気部材の下流端部と遮蔽板とを備えていてもよい。また、傾斜開口部は、排気部材の下流端部における開口であってもよい。更に、遮蔽板は、遮蔽部であって、排気部材の下流端部に溶接によって固定されていてもよい。このような構成によれば、排気部材の下流端部に遮蔽板が溶接されることで遮蔽部が構成されているため、簡素な構成により、排気流路の圧力損失が上昇しにくく、凝縮水の逆流を防ぎやすくすることのできる消音装置の提供が可能となる。 In one aspect of the present disclosure, the exhaust pipe may include an exhaust member and a shielding plate. The downstream end of the exhaust pipe may include a downstream end of the exhaust member and a shielding plate. The inclined opening may be an opening at the downstream end of the exhaust member. Furthermore, the shielding plate may be a shielding portion, and may be fixed to the downstream end portion of the exhaust member by welding. According to such a configuration, since the shielding portion is configured by welding the shielding plate to the downstream end portion of the exhaust member, the pressure loss of the exhaust passage is unlikely to increase due to the simple configuration, and the condensed water Therefore, it is possible to provide a silencer that can easily prevent backflow.
排気システムの構成を示す全体図である。1 is an overall view showing a configuration of an exhaust system. 排気管及び筐体の構成を示す断面図である。It is sectional drawing which shows the structure of an exhaust pipe and a housing | casing. 排気管の下流端部の斜視図である。It is a perspective view of the downstream end part of an exhaust pipe. 筐体の内部に凝縮水が溜まった例を示す断面図である。It is sectional drawing which shows the example which the condensed water collected in the inside of a housing | casing.
　１…触媒コンバータ、２，４…排気管、３…筐体、２０…端部、２０Ａ…開口、２０Ｂ…遮蔽部、２１…排気部材、２２…遮蔽板、１００…排気システム。 DESCRIPTION OF SYMBOLS 1 ... Catalytic converter, 2, 4 ... Exhaust pipe, 3 ... Housing | casing, 20 ... End part, 20A ... Opening, 20B ... Shielding part, 21 ... Exhaust member, 22 ... Shielding plate, 100 ... Exhaust system.
　以下、本開示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に示すように、排気システム１００は、自動車の内燃機関から排出された排ガスの排気流路の一部を構成するものである。排気システム１００は、触媒コンバータ１と、排気管２と、筐体３と、排気管４と、を備える。 Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings.
[1. Constitution]
As shown in FIG. 1, the exhaust system 100 constitutes a part of an exhaust passage of exhaust gas discharged from an internal combustion engine of an automobile. The exhaust system 100 includes a catalytic converter 1, an exhaust pipe 2, a housing 3, and an exhaust pipe 4.
　触媒コンバータ１には、内燃機関から排出された排ガスが導入される。また、触媒コンバータ１の内部には、図示しない触媒が収容されている。当該触媒は、触媒コンバータ１に導入された排ガスを浄化する。なお、触媒コンバータ１の触媒の上流には、排気センサが設けられている。 The exhaust gas discharged from the internal combustion engine is introduced into the catalytic converter 1. In addition, a catalyst (not shown) is accommodated in the catalytic converter 1. The catalyst purifies the exhaust gas introduced into the catalytic converter 1. An exhaust sensor is provided upstream of the catalyst of the catalytic converter 1.
　排気管２は、触媒コンバータ１の下流で排気流路を形成する。排気管２は、筐体３の上流側の部分に開けられている貫通孔に挿通されている。より詳しくは、図２及び図３に示すように、排気管２の下流端部である端部２０が、当該貫通孔を介し、筐体３の内部に上流側から突出した状態で挿通されている。排気管２は、排気部材２１と、遮蔽板２２と、を備える。なお、端部２０、排気部材２１及び遮蔽板２２の詳細な説明については後述する。 The exhaust pipe 2 forms an exhaust passage downstream of the catalytic converter 1. The exhaust pipe 2 is inserted through a through hole opened in a portion on the upstream side of the housing 3. More specifically, as shown in FIGS. 2 and 3, the end 20, which is the downstream end of the exhaust pipe 2, is inserted through the through hole into the housing 3 in a state protruding from the upstream side. Yes. The exhaust pipe 2 includes an exhaust member 21 and a shielding plate 22. A detailed description of the end portion 20, the exhaust member 21, and the shielding plate 22 will be described later.
　筐体３は、楕円筒状であって、排気管２の下流で排気流路を形成する。筐体３は、排気騒音の低減機能を有する。なお、筐体３における内部の詳細な構成については、図２及び図４で省略されている。 The housing 3 has an elliptic cylinder shape and forms an exhaust passage downstream of the exhaust pipe 2. The housing 3 has a function of reducing exhaust noise. Note that the detailed internal configuration of the housing 3 is omitted in FIGS. 2 and 4.
　排気管４は、筐体３の下流で排気流路を形成する、円筒状のパイプである。排気管４は、筐体３の下流側の部分に開けられている貫通孔に挿通されている。より詳しくは、排気管４の上流が、筐体３の内部に下流側から突出した状態で挿通されている。 The exhaust pipe 4 is a cylindrical pipe that forms an exhaust passage downstream of the housing 3. The exhaust pipe 4 is inserted through a through hole opened in a downstream portion of the housing 3. More specifically, the upstream side of the exhaust pipe 4 is inserted into the housing 3 in a state of protruding from the downstream side.
　次に、排気管２における端部２０、排気部材２１及び遮蔽板２２の詳細な構成について説明する。
　排気部材２１は、円筒状のパイプである。遮蔽板２２は、排気部材２１とは別体の板材である。遮蔽板２２は、排気部材２１に溶接によって固定され、排気部材２１の排気流路の一部、換言すれば排気管２の排気流路の一部、を塞いでいる。つまり、排気管２は、排気部材２１に遮蔽板２２が固定されていることによって構成されている。また、端部２０は、排気管２における下流端部の部分であって、排気部材２１の下流端部と遮蔽板２２によって構成されている。 Next, detailed configurations of the end 20, the exhaust member 21, and the shielding plate 22 in the exhaust pipe 2 will be described.
The exhaust member 21 is a cylindrical pipe. The shielding plate 22 is a separate plate material from the exhaust member 21. The shielding plate 22 is fixed to the exhaust member 21 by welding and closes a part of the exhaust passage of the exhaust member 21, in other words, a part of the exhaust passage of the exhaust pipe 2. That is, the exhaust pipe 2 is configured by fixing the shielding plate 22 to the exhaust member 21. The end portion 20 is a portion of the downstream end portion of the exhaust pipe 2, and is constituted by the downstream end portion of the exhaust member 21 and the shielding plate 22.
　端部２０は、前述したように筐体３の内部に上流側から突出した状態で挿通されている。端部２０の中心軸Ｘは、鉛直方向に垂直である。端部２０は、直線状であって、端部２０の先端は、中心軸Ｘと垂直かつ鉛直方向と垂直な方向から見て、下流側に向かってＶ字状に突出している。端部２０における当該Ｖ字状の部分は、排気部材２１の一端が、中心軸Ｘと垂直かつ鉛直方向と垂直な方向から見て、Ｖ字状に突出するように切断されることにより形成された部分である。 As described above, the end 20 is inserted into the housing 3 in a state of protruding from the upstream side. The central axis X of the end 20 is perpendicular to the vertical direction. The end 20 is linear, and the tip of the end 20 protrudes in a V shape toward the downstream side when viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction. The V-shaped portion of the end portion 20 is formed by cutting one end of the exhaust member 21 so as to protrude in a V shape when viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction. Part.
　中心軸Ｘと垂直かつ鉛直方向と垂直な方向から見た当該Ｖ字状の部分における頂点は、中心軸Ｘ上に位置する。換言すれば、当該Ｖ字状の部分は、中心軸Ｘを通る鉛直方向に垂直な仮想の面を挟んで、後述する開口２０Ａにおける中心軸Ｘと垂直な面に対して傾いた面と、当該傾いた面と対称な面と、に沿って排気部材２１の一端が切断された部分である。つまり、前述したＶ字状の部分は、中心軸Ｘと垂直かつ鉛直方向と垂直な方向から見て、中心軸Ｘを挟んで対称な形状である。 The apex of the V-shaped portion viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction is located on the central axis X. In other words, the V-shaped part includes a plane inclined with respect to a plane perpendicular to the central axis X in the opening 20A to be described later, across a virtual plane perpendicular to the vertical direction passing through the central axis X, and This is a portion where one end of the exhaust member 21 is cut along a plane that is symmetrical to the inclined plane. That is, the V-shaped portion described above has a symmetrical shape with respect to the central axis X when viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction.
　また、端部２０は、開口２０Ａと、遮蔽部２０Ｂと、を有する。
　開口２０Ａは、中心軸Ｘと垂直な面に対して傾いた面に沿って、鉛直方向における上側を向いて、開口している。具体的には、開口２０Ａは、前述したＶ字状の部分における、中心軸Ｘよりも鉛直方向上側の開口である。また、前述した排気部材２１の一端における切断位置は、開口２０Ａの開口面積が、排気部材２１の開口、換言すれば端部２０における加工されていない部分の排気流路の断面積と等しくなるように設定されている。なお、開口２０Ａは、鉛直方向において遮蔽部２０Ｂの上側に位置する。 The end 20 has an opening 20A and a shielding part 20B.
The opening 20 </ b> A opens along the plane inclined with respect to the plane perpendicular to the central axis X so as to face upward in the vertical direction. Specifically, the opening 20A is an opening on the upper side in the vertical direction from the central axis X in the V-shaped portion described above. Further, the cutting position at one end of the exhaust member 21 described above is such that the opening area of the opening 20A is equal to the opening of the exhaust member 21, in other words, the cross-sectional area of the exhaust passage in the unprocessed portion of the end portion 20. Is set to The opening 20A is located above the shielding part 20B in the vertical direction.
　遮蔽部２０Ｂは、前述したＶ字状の部分における、中心軸Ｘよりも鉛直方向下側の開口を塞いでいる部分、換言すれば、排気管２の排気流路を塞いでいる部分である。つまり、本実施形態における遮蔽部２０Ｂは、遮蔽板２２のことを指す。遮蔽部２０Ｂは、中心軸Ｘと垂直な面に対して傾いた面に沿った形状であって、遮蔽部２０Ｂの外面は、鉛直方向における下側を向いている。 The shielding part 20B is a part of the V-shaped part mentioned above that blocks the opening below the central axis X in the vertical direction, in other words, a part that blocks the exhaust flow path of the exhaust pipe 2. That is, the shielding part 20 </ b> B in the present embodiment refers to the shielding plate 22. The shielding part 20B has a shape along a plane inclined with respect to a plane perpendicular to the central axis X, and the outer surface of the shielding part 20B faces downward in the vertical direction.
　［２．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）中心軸Ｘと垂直な面に対して傾斜して、端部２０に開口２０Ａが開いている。さらに、開口２０Ａの開口面積は、端部２０における加工されていない部分の排気流路の断面積と等しい。このため、排気流路の圧力損失が上昇しにくい消音装置の提供が可能となる。 [2. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) An opening 20 </ b> A is opened at the end 20, inclined with respect to a plane perpendicular to the central axis X. Furthermore, the opening area of the opening 20 </ b> A is equal to the cross-sectional area of the unprocessed portion of the exhaust passage at the end 20. For this reason, it is possible to provide a muffler device in which the pressure loss in the exhaust passage is unlikely to increase.
　（１ｂ）筐体３の内部に発生した凝縮水は、遮蔽部２０Ｂによって、筐体３から排気管２へと逆流しにくい。具体的には、図４に示すように、筐体３の内部における中心軸Ｘのラインに凝縮水の水面が到達するまで凝縮水の逆流が防止される構造である。このため、凝縮水の逆流を防ぎやすくすることのできる消音装置の提供が可能となる。 (1b) Condensed water generated inside the housing 3 is unlikely to flow backward from the housing 3 to the exhaust pipe 2 by the shielding portion 20B. Specifically, as shown in FIG. 4, the reverse flow of the condensed water is prevented until the surface of the condensed water reaches the line of the central axis X inside the housing 3. Therefore, it is possible to provide a silencer that can easily prevent the backflow of condensed water.
　（１ｃ）端部２０は、直線状であって、端部２０の中心軸Ｘは、鉛直方向に垂直であるため、組付けが容易な消音装置の提供が可能となる。すなわち、凝縮水が逆流しないよう、例えば、直線状の排気管の端部における中心軸を鉛直方向上側に向くように筐体内部に組み付けたり、開口が鉛直方向上側を向くように下流が屈曲している排気部材を筐体に組み付ける等、筐体の内部で排気部材の開口を鉛直方向上側に向けることが考えられる。そうすると、排気部材の筐体への組み付けは容易ではない。 (1c) Since the end portion 20 is linear and the center axis X of the end portion 20 is perpendicular to the vertical direction, it is possible to provide a silencer that can be easily assembled. That is, in order to prevent the condensate from flowing backward, for example, it is assembled inside the housing so that the central axis at the end of the straight exhaust pipe faces vertically upward, or the downstream is bent so that the opening faces vertically upward. It is conceivable that the opening of the exhaust member is directed upward in the vertical direction inside the housing, for example, by attaching the exhaust member to the housing. If it does so, the assembly | attachment to the housing | casing of an exhaust member will not be easy.
　その点、本実施形態の排気管２では、排気部材２１における、中心軸Ｘよりも鉛直方向下側が、遮蔽板２２によって遮蔽されている。このため、直線状の排気管２を鉛直方向に垂直に、つまり水平に筐体３に組み付ければ、図４に示すように、凝縮水は中心軸Ｘのラインに達するまで逆流しにくくなる。このため、例えば、開口が鉛直方向上側に向くように屈曲している排気管を筐体に組み付ける場合や、排気管の端部の中心軸を鉛直方向に傾けて排気管を筐体に組み付ける場合と比較して、組付けが容易な消音装置の提供が可能となる。 In that respect, in the exhaust pipe 2 of the present embodiment, the lower side of the exhaust member 21 in the vertical direction than the central axis X is shielded by the shielding plate 22. For this reason, if the straight exhaust pipe 2 is assembled to the casing 3 perpendicularly to the vertical direction, that is, horizontally, the condensed water hardly flows back until reaching the line of the central axis X as shown in FIG. For this reason, for example, when assembling an exhaust pipe bent so that the opening faces upward in the vertical direction, or when assembling the exhaust pipe into the casing with the central axis of the end of the exhaust pipe inclined in the vertical direction Compared to the above, it is possible to provide a silencer that can be easily assembled.
　（１ｄ）遮蔽部２０Ｂが、中心軸Ｘと垂直な面に対して鉛直方向上側に向かって傾いた形状である。このため、中心軸Ｘと垂直な面に沿った遮蔽板を筐体に固定した場合と比較して、排ガスは排気管２の排気流路をスムーズに流れる。つまり、例えば、下流端部の鉛直方向下側が排気管２と異なる排気管が、筐体に組み付けられているとする。具体的には、当該排気管を構成する排気部材の鉛直方向下側において、当該排気部材の下流端部の中心軸に垂直な開口が遮蔽板によって塞がれている点が、排気管２と異なる。つまり、当該排気管の下流は、傾斜した開口が設けられずに遮蔽されている。この場合、当該排気管の排気流路における鉛直方向下側付近を流れる排ガスは、排気部材と遮蔽板との境目付近で滞りやすく、スムーズに流れにくい。その点、本実施形態では、遮蔽部２０Ｂが鉛直方向上側に向かって傾いているため、排気管２の排気流路を流れる排ガスは、遮蔽部２０Ｂ、換言すれば遮蔽板２２の内面に沿って開口２０Ａへ導かれやすい。このため、排ガスは排気管２の排気流路をスムーズに流れる。その結果、本実施形態によれば、圧力損失が上昇しにくい消音装置の提供が可能となる。 (1d) The shielding part 20B has a shape tilted upward in the vertical direction with respect to the plane perpendicular to the central axis X. For this reason, compared with the case where the shielding plate along the plane perpendicular to the central axis X is fixed to the housing, the exhaust gas flows smoothly through the exhaust passage of the exhaust pipe 2. That is, for example, it is assumed that an exhaust pipe different from the exhaust pipe 2 on the lower side in the vertical direction of the downstream end is assembled to the housing. Specifically, on the lower side in the vertical direction of the exhaust member constituting the exhaust pipe, the point perpendicular to the central axis of the downstream end portion of the exhaust member is blocked by the shielding plate. Different. That is, the downstream of the exhaust pipe is shielded without an inclined opening. In this case, the exhaust gas flowing in the vicinity of the lower side in the vertical direction in the exhaust passage of the exhaust pipe is likely to stagnate near the boundary between the exhaust member and the shielding plate, and does not flow smoothly. In this respect, in the present embodiment, since the shielding portion 20B is inclined upward in the vertical direction, the exhaust gas flowing through the exhaust passage of the exhaust pipe 2 flows along the shielding portion 20B, in other words, the inner surface of the shielding plate 22. It is easy to be guided to the opening 20A. For this reason, the exhaust gas flows smoothly through the exhaust passage of the exhaust pipe 2. As a result, according to the present embodiment, it is possible to provide a silencer in which pressure loss is unlikely to increase.
　［３．他の実施形態］
　以上、本開示の実施形態について説明したが、本開示は、上記実施形態に限定されることなく、種々の形態を採り得ることは言うまでもない。 [3. Other Embodiments]
As mentioned above, although embodiment of this indication was described, it cannot be overemphasized that this indication can take various forms, without being limited to the above-mentioned embodiment.
　（２ａ）上記実施形態では、端部２０における、中心軸Ｘと垂直かつ鉛直方向と垂直な方向から見た当該Ｖ字状の部分が、頂点が中心軸Ｘ上にあって、中心軸Ｘを挟んで、開口２０Ａと遮蔽部２０Ｂとにおいて対称な形状である構成を例示した。しかし、排気管の端部の形状はこれに限定されるものではない。例えば、中心軸と垂直かつ鉛直方向と垂直な方向から見た排気管の端部の形状が、端部の中心軸上にない、換言すれば、前述した方向から見て、中心軸を挟んで開口と遮蔽部とにおいて非対称な排気管でもよい。 (2a) In the above embodiment, the V-shaped portion of the end portion 20 viewed from the direction perpendicular to the central axis X and perpendicular to the vertical direction has a vertex on the central axis X, and the central axis X is A configuration in which the opening 20A and the shielding portion 20B are symmetrical with respect to each other is illustrated. However, the shape of the end of the exhaust pipe is not limited to this. For example, the shape of the end portion of the exhaust pipe viewed from the direction perpendicular to the central axis and perpendicular to the vertical direction is not on the central axis of the end portion, in other words, when viewed from the above-described direction, An asymmetrical exhaust pipe may be used between the opening and the shield.
　（２ｂ）上記実施形態では、開口２０Ａの開口面積が、端部２０における加工されていない部分の排気流路の断面積と等しい構成を例示した。しかし、排気管の構成は、これに限定されるものではない。例えば、排気管の開口は、加工されていない部分の排気流路の断面積と異なるように設定してもよい。 (2b) In the above embodiment, the configuration in which the opening area of the opening 20A is equal to the cross-sectional area of the unprocessed portion of the end portion 20 is illustrated. However, the configuration of the exhaust pipe is not limited to this. For example, the opening of the exhaust pipe may be set to be different from the cross-sectional area of the unprocessed portion of the exhaust passage.
　（２ｃ）上記実施形態では、排気部材２１に遮蔽板２２が固定されていることによって構成されている排気管２を例示したが、排気管の構成はこれに限定されるものではない。排気管は、排気部材及び遮蔽板に加え、他の部品を備えていてもよい。 (2c) In the above embodiment, the exhaust pipe 2 configured by the shielding member 22 being fixed to the exhaust member 21 is exemplified, but the configuration of the exhaust pipe is not limited to this. The exhaust pipe may include other components in addition to the exhaust member and the shielding plate.
　（２ｄ）上記実施形態では、排気部材２１とは別体の板材である遮蔽板２２が、排気部材２１に溶接されている構成を例示した。しかし、排気管の構成はこれに限定されるものではない。例えば、排気部材と別体である遮蔽板の代わりに、排気管の端部を変形させることによって、遮蔽部を排気部材に設けてもよい。こうすることにより、遮蔽板を溶接する手間が省け、より簡素な構成で排気管の形成が可能となる。 (2d) In the above-described embodiment, the configuration in which the shielding plate 22, which is a separate plate material from the exhaust member 21, is welded to the exhaust member 21. However, the configuration of the exhaust pipe is not limited to this. For example, instead of a shielding plate that is a separate body from the exhaust member, the shielding portion may be provided on the exhaust member by deforming the end of the exhaust pipe. By doing so, the labor of welding the shielding plate can be saved, and the exhaust pipe can be formed with a simpler configuration.
　（２ｅ）上記実施形態では、排気管２の端部２０における中心軸Ｘが鉛直方向に垂直に筐体３に組み付けられている構成を例示したが、排気管の位置はこれに限定されるものではない。例えば、排気管の端部は、中心軸が鉛直方向に垂直でない位置で筐体に組み付けられていてもよい。 (2e) In the above embodiment, the configuration in which the central axis X at the end 20 of the exhaust pipe 2 is assembled to the housing 3 perpendicular to the vertical direction is exemplified, but the position of the exhaust pipe is limited to this. is not. For example, the end of the exhaust pipe may be assembled to the housing at a position where the central axis is not perpendicular to the vertical direction.
　（２ｆ）上記実施形態では、楕円筒状の筐体３を例示したが、筐体の形状はこれに限定されるものではない。例えば、筐体は、真円筒状や、四角筒状、クラムシェル状の形状であってもよい。 (2f) In the above embodiment, the oval cylindrical housing 3 is illustrated, but the shape of the housing is not limited to this. For example, the casing may have a true cylindrical shape, a square cylindrical shape, or a clamshell shape.
　（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一部を省略してもよい。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開示の実施形態である。 (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. Moreover, you may abbreviate | omit a part of structure of the said embodiment. 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 disclosure.

Claims (5)

  1. 　筐体と、
    　前記筐体の上流に位置し、前記筐体へと排ガスを導く排気流路を形成する、円筒状の排気管と、
    　を備え、
    　前記排気管の下流端部は、直線状であり、前記筐体の内部に突出しており、
    　前記排気管の下流端部は、前記排気管の下流端部の中心軸と垂直な面に対して傾いた面に沿って開口している傾斜開口部と、前記排気流路を塞ぐ遮蔽部とを有し、
    　前記傾斜開口部は、鉛直方向において前記遮蔽部の上側に位置している、消音装置。     A housing,
    A cylindrical exhaust pipe that is located upstream of the housing and forms an exhaust passage that guides exhaust gas to the housing;
    With
    The downstream end of the exhaust pipe is linear and protrudes into the housing,
    The downstream end of the exhaust pipe includes an inclined opening that opens along a plane that is inclined with respect to a plane perpendicular to the central axis of the downstream end of the exhaust pipe, and a shielding part that blocks the exhaust flow path. Have
    The silencing device is located above the shielding part in the vertical direction.
  2. 　請求項１に記載の消音装置であって、
    　前記傾斜開口部の開口面積は、前記排気流路の断面積以上である、消音装置。     The muffler according to claim 1,
    The silencing device, wherein an opening area of the inclined opening is equal to or larger than a cross-sectional area of the exhaust passage.
  3. 　請求項１又は請求項２に記載の消音装置であって、
    　前記排気管の下流端部の中心軸は、鉛直方向に垂直である、消音装置。     The muffler according to claim 1 or 2, wherein
    The silencer, wherein the central axis of the downstream end of the exhaust pipe is perpendicular to the vertical direction.
  4. 　請求項１から請求項３までのいずれか一項に記載の消音装置であって、
    　前記遮蔽部は、前記排気管の下流端部の中心軸と垂直な面に対して傾いた面に沿った形状である、消音装置。     It is a silencer as described in any one of Claim 1- Claim 3, Comprising:
    The silencer is a silencer having a shape along a plane inclined with respect to a plane perpendicular to a central axis of a downstream end portion of the exhaust pipe.
  5. 　請求項１から請求項４までのいずれか一項に記載の消音装置であって、
    　前記排気管は、排気部材と、遮蔽板と、を備え、
    　前記排気管の下流端部は、前記排気部材の下流端部と前記遮蔽板とを備え、
    　前記傾斜開口部は、前記排気部材の下流端部における開口であって、
    　前記遮蔽板は、前記遮蔽部であって、前記排気部材の下流端部に溶接によって固定されている、消音装置。     It is a silencer as described in any one of Claim 1- Claim 4, Comprising:
    The exhaust pipe includes an exhaust member and a shielding plate,
    The downstream end of the exhaust pipe includes the downstream end of the exhaust member and the shielding plate,
    The inclined opening is an opening at the downstream end of the exhaust member,
    The silencer is a silencer, which is the shield, and is fixed to the downstream end of the exhaust member by welding.
PCT/JP2016/063588 2016-05-02 2016-05-02 Silencer WO2017191677A1 (en)

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Citations (4)

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JP2003120252A (en) * 2001-10-05 2003-04-23 Mitsubishi Automob Eng Co Ltd Exhaust system structure for automobile
JP2005069038A (en) * 2003-08-20 2005-03-17 Toyota Motor Corp Muffler
JP2009138730A (en) * 2007-12-07 2009-06-25 Hyundai Motor Co Ltd Noise eliminator for vehicle, and exhaust device using the same
JP2010127161A (en) * 2008-11-27 2010-06-10 Sakamoto Industry Co Ltd Muffler for internal combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003120252A (en) * 2001-10-05 2003-04-23 Mitsubishi Automob Eng Co Ltd Exhaust system structure for automobile
JP2005069038A (en) * 2003-08-20 2005-03-17 Toyota Motor Corp Muffler
JP2009138730A (en) * 2007-12-07 2009-06-25 Hyundai Motor Co Ltd Noise eliminator for vehicle, and exhaust device using the same
JP2010127161A (en) * 2008-11-27 2010-06-10 Sakamoto Industry Co Ltd Muffler for internal combustion engine

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