JP2012112279A - Exhaust apparatus - Google Patents

Exhaust apparatus Download PDF

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Publication number
JP2012112279A
JP2012112279A JP2010260908A JP2010260908A JP2012112279A JP 2012112279 A JP2012112279 A JP 2012112279A JP 2010260908 A JP2010260908 A JP 2010260908A JP 2010260908 A JP2010260908 A JP 2010260908A JP 2012112279 A JP2012112279 A JP 2012112279A
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Prior art keywords
exhaust
exhaust pipe
rear side
fall prevention
auxiliary device
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JP2010260908A
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JP5158182B2 (en
Inventor
Yasuhiko Koda
康彦 香田
Takaharu Nagatoshi
高晴 永利
Keisuke Yasunaka
慶祐 安仲
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2010260908A priority Critical patent/JP5158182B2/en
Priority to BR112012031376A priority patent/BR112012031376A2/en
Priority to CN201180021910.2A priority patent/CN102869866B/en
Priority to PCT/IB2011/002962 priority patent/WO2012069922A1/en
Publication of JP2012112279A publication Critical patent/JP2012112279A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1822—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration for fixing exhaust pipes or devices to vehicle body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent, even if a joint part 8b of an exhaust assist device 3 and an exhaust pipe 4 are separated with a relatively inexpensive countermeasure, the either part from trailing down and interfering on a road surface, in an exhaust apparatus that includes exhaust pipes 2, 4 attached to an engine 1, and the exhaust assist device 3 provided in the midway of the exhaust pipes 2, 4 and suspended from a vehicle body 10, and where either an upstream side or a downstream side in an exhaust flow direction of the exhaust assist device 3 is jointed to the exhaust pipes 2, 4 by welding.SOLUTION: A falling prevention part 15 that hangs either side of the joint when a joint 8b of the auxiliary exhaust device 3 and the exhaust pipes 2, 4 separates, is provided on at least one of the auxiliary exhaust device 3 and the exhaust pipes 2, 4 to which the auxiliary exhaust device 3 is jointed.

Description

本発明は、エンジンに取り付けられる排気管と、この排気管の途中に設置されかつ車体に吊り下げられる排気補助装置とを備え、かつ前記排気補助装置の排気流れ方向の上流側または下流側の少なくとも一方が溶接により排気管に接合されている排気装置に関する。   The present invention comprises an exhaust pipe attached to an engine, and an exhaust auxiliary device installed in the middle of the exhaust pipe and suspended from a vehicle body, and at least upstream or downstream in the exhaust flow direction of the exhaust auxiliary device. The present invention relates to an exhaust device in which one is joined to an exhaust pipe by welding.

従来、エンジンの排気管の途中には、消音器や触媒コンバータなどの排気補助装置が設置されている。このような排気補助装置は、一般に、排気管よりも大きな外形であるが、この排気流れ方向の上流側および下流側を小径筒とし、この小径筒を排気管に溶接により接合している。   Conventionally, exhaust auxiliary devices such as a silencer and a catalytic converter are installed in the middle of an engine exhaust pipe. Such an exhaust assist device generally has an outer shape larger than that of the exhaust pipe, but the upstream and downstream sides in the exhaust flow direction have small diameter cylinders, and the small diameter cylinders are joined to the exhaust pipe by welding.

ところで、前記排気補助装置は、車体に吊り下げられる形で支持されている（例えば特許文献１参照）。また、排気管において排気補助装置よりも下流側に位置する排気管（リア側排気管という）の排気流れ方向の終端には、リアマフラーと呼ばれる消音器が設置されており、この消音器が車体に吊り下げられる形で支持されている。   By the way, the exhaust assist device is supported in such a manner that it is suspended from the vehicle body (see, for example, Patent Document 1). In addition, a silencer called a rear muffler is installed at the end of the exhaust pipe in the exhaust flow direction (referred to as a rear-side exhaust pipe) located downstream of the exhaust auxiliary device in the exhaust pipe. Supported in a suspended form.

このような従来の排気装置では、万一、排気補助装置とリア側排気管との接合部が分離してしまうと、このリア側排気管の接合端が垂れ下がるようになって、甚だしい場合には路面に干渉することになりかねない。   In such a conventional exhaust device, if the joint between the exhaust auxiliary device and the rear side exhaust pipe is separated, the joint end of the rear side exhaust pipe will hang down. It may interfere with the road surface.

これに対し、例えば特許文献２では、排気補助装置の小径筒と排気管とをねじで結合する構造にすることにより、当該結合部分を分離しにくくしている。   On the other hand, in Patent Document 2, for example, a structure in which the small-diameter cylinder of the exhaust assist device and the exhaust pipe are coupled with a screw makes it difficult to separate the coupling portion.

特開２００２−１３８８２６号公報JP 2002-138826 A 特開２００１−３４２８３０号公報JP 2001-342830 A

上記特許文献２に係る従来例では、排気補助装置と排気管との結合部分を分離しにくくするための発明であって、万一分離したときの対処形態に工夫を施したものではない。また、この特許文献２に係る従来例では、排気補助装置の小径筒と排気管とにオスねじ溝およびメスねじ溝を形成する必要があるために、それらのねじ結合部分に関する加工や取り付けの手間がかかるなど、コストが嵩むことが懸念される。   The conventional example according to Patent Document 2 described above is an invention for making it difficult to separate the coupling portion between the exhaust assist device and the exhaust pipe, and does not devise a coping manner when separated. Further, in the conventional example according to Patent Document 2, since it is necessary to form a male screw groove and a female screw groove in the small-diameter cylinder and the exhaust pipe of the exhaust auxiliary device, it is troublesome to process and attach those screw coupling portions. There is a concern that the cost will increase.

このような事情に鑑み、本発明は、エンジンに取り付けられる排気管と、この排気管の途中に設置されかつ車体に吊り下げられる排気補助装置とを備え、かつ前記排気補助装置の排気流れ方向の上流側または下流側の少なくとも一方が溶接により排気管に接合されている排気装置において、比較的安価な対策で、排気補助装置と排気管との接合部分が万一分離したときでも、それらのいずれか一方が垂れ下がって路面に干渉することを回避できるようにすることを目的としている。   In view of such circumstances, the present invention includes an exhaust pipe attached to an engine, an exhaust auxiliary device installed in the middle of the exhaust pipe and suspended from a vehicle body, and the exhaust auxiliary device in the exhaust flow direction. In an exhaust system in which at least one of the upstream side or the downstream side is joined to the exhaust pipe by welding, even if the joint between the exhaust auxiliary equipment and the exhaust pipe is separated by a relatively inexpensive measure, It is intended to avoid that one of them hangs down and interferes with the road surface.

本発明は、エンジンに取り付けられる排気管と、この排気管の途中に設置されかつ車体に吊り下げられる排気補助装置とを備え、かつ前記排気補助装置の排気流れ方向の上流側または下流側の少なくとも一方が溶接により排気管に接合されている排気装置であって、前記排気補助装置または当該排気補助装置が接合される排気管の少なくともいずれか一方に、前記接合部が分離したときに残り他方に引っ掛かる落下防止部が設けられている、ことを特徴としている。   The present invention comprises an exhaust pipe attached to an engine, and an exhaust auxiliary device installed in the middle of the exhaust pipe and suspended from a vehicle body, and at least upstream or downstream in the exhaust flow direction of the exhaust auxiliary device. One of the exhaust devices is joined to the exhaust pipe by welding, and at least one of the exhaust auxiliary device or the exhaust pipe to which the exhaust auxiliary device is joined, and the remaining one when the joint is separated It is characterized in that a falling prevention part is provided.

このような落下防止部を備えている場合には、排気補助装置と排気管との接合部分が万一分離したとすると、例えば排気管の接合端が垂れ下がるようになるものの、この排気管の接合端が落下防止部に引っ掛かることになる。そのために、排気管の接合端が若干垂れ下がるものの、落下防止部を通じて排気補助装置に支えられることになって、大きく垂れ下がらずに済むようになる。したがって、このように分離しても、排気管の接合端が路面に干渉せずに済むので、例えば修理工場まで支障なく車両を自走搬送することが可能になる。   In the case where such a fall prevention part is provided, if the joint between the exhaust auxiliary device and the exhaust pipe is separated, for example, the joint end of the exhaust pipe will hang down. The end will be caught by the fall prevention part. Therefore, although the joint end of the exhaust pipe slightly hangs down, it is supported by the exhaust assisting device through the fall prevention part, so that it does not droop drastically. Therefore, even if it separates in this way, the joint end of the exhaust pipe does not need to interfere with the road surface. For example, the vehicle can be self-propelled and conveyed to a repair shop without any trouble.

しかも、前記落下防止部を排気補助装置または排気管に設置するだけの簡易な対策であるから、設備コストの上昇を抑制することが可能になり、排気装置を廉価に提供できるようになる。   And since it is a simple measure which only installs the said fall prevention part in an exhaust auxiliary device or an exhaust pipe, it becomes possible to suppress an increase in equipment cost and to provide an exhaust device cheaply.

好ましくは、前記排気補助装置の排気流れ方向下流側がリア側排気管に接合されており、前記落下防止部は、前記リア側排気管の接合端の鉛直方向上側に設置されていて、前記排気補助装置に向けて延びる形状とされている。   Preferably, a downstream side in the exhaust flow direction of the exhaust auxiliary device is joined to a rear side exhaust pipe, and the fall prevention unit is installed above a joining end of the rear side exhaust pipe in the vertical direction. The shape extends toward the device.

この場合、排気補助装置とリア側排気管との接合部分が分離することによってリア側排気管の接合端が垂れ下がったときに、このリア側排気管の接合端に設置している落下防止部が、排気補助装置の下流側接合端の上半分に覆い被さるような形態で引っ掛かることになる。そのために、リア側排気管の接合端が若干垂れ下がるものの、路面に干渉するほど大きく垂れ下がらずに済むようになる。   In this case, when the joint part of the rear side exhaust pipe hangs down due to separation of the joint part between the exhaust auxiliary device and the rear side exhaust pipe, the fall prevention part installed at the joint end of the rear side exhaust pipe Then, the exhaust auxiliary device is hooked in such a form as to cover the upper half of the downstream joint end. Therefore, although the joint end of the rear side exhaust pipe slightly hangs down, it does not hang down so much as to interfere with the road surface.

好ましくは、前記排気補助装置および前記リア側排気管は、車体の底部に設置される上向き凹部内に非接触で配置されており、前記落下防止部の先端部分は、下向きに開いた状態の半円筒形に形成されており、この半円筒形部分の円周方向両端の離隔寸法は、前記排気補助装置の排気流れ方向下流側接合端と前記上向き凹部の内側面との離隔寸法よりも大きく設定されている。   Preferably, the exhaust assist device and the rear side exhaust pipe are arranged in a non-contact manner in an upward concave portion installed at the bottom of the vehicle body, and a tip portion of the fall prevention portion is a half in a state of opening downward. It is formed in a cylindrical shape, and the separation dimension at both ends in the circumferential direction of this semi-cylindrical part is set to be larger than the separation dimension between the downstream joining end of the exhaust auxiliary device in the exhaust flow direction and the inner surface of the upward recess. Has been.

このように設定していると、仮に排気補助装置とリア側排気管との接合部分が分離した状態でリア側排気管が横方向に揺れ動いたとしても、このリア側排気管の接合端に設置している落下防止部が、排気補助装置の下流側接合端と車体の上向き凹部の内側面との離隔部分から下に抜け落ちることが防止される。   With this setting, even if the rear exhaust pipe swings laterally with the joint between the exhaust auxiliary device and the rear exhaust pipe separated, it is installed at the joint end of this rear exhaust pipe. The falling-preventing portion is prevented from falling down from the separated portion between the downstream joint end of the exhaust assist device and the inner surface of the upward concave portion of the vehicle body.

好ましくは、前記排気補助装置の排気流れ方向下流側がリア側排気管に接合されており、前記落下防止部は、前記排気補助装置の鉛直方向下側に設置されていて、前記リア側排気管に向けて延びる形状とされている。   Preferably, a downstream side in the exhaust flow direction of the exhaust auxiliary device is joined to a rear side exhaust pipe, and the fall prevention unit is installed on a lower side in the vertical direction of the exhaust auxiliary device, and is connected to the rear side exhaust pipe. It is the shape extended toward.

この場合、排気補助装置とリア側排気管との接合部分が分離することによってリア側排気管の接合端が垂れ下がったときに、このリア側排気管の接合端が、排気補助装置に設置している落下防止部に受け止められるような形態で引っ掛かることになる。そのために、リア側排気管の接合端が若干垂れ下がるものの、路面に干渉するほど大きく垂れ下がらずに済むようになる。   In this case, when the joint end of the rear exhaust pipe hangs down due to separation of the joint portion between the exhaust assist device and the rear exhaust pipe, the joint end of the rear exhaust pipe is installed in the exhaust assist device. It will be caught in a form that can be received by the fall prevention part. Therefore, although the joint end of the rear side exhaust pipe slightly hangs down, it does not hang down so much as to interfere with the road surface.

好ましくは、前記排気補助装置および前記リア側排気管は、車体の底部に設置される上向き凹部内に非接触で配置されており、前記落下防止部の先端部分は、上向きに開いた状態の半円筒形に形成されており、前記半円筒形部分の円周方向一端と上向き凹部の内側面との離隔寸法、および前記半円筒形部分の円周方向他端と上向き凹部の内側面との離隔寸法は、前記リア側排気管の接合端の直径寸法よりも小さく設定されている。   Preferably, the exhaust assist device and the rear side exhaust pipe are arranged in a non-contact manner in an upward concave portion installed at the bottom of a vehicle body, and a tip portion of the fall prevention portion is a half in an upwardly opened state. The cylindrical dimension is formed, and the separation between the circumferential one end of the semi-cylindrical portion and the inner surface of the upward recess, and the separation between the other circumferential end of the semi-cylindrical portion and the inner surface of the upward recess The dimension is set smaller than the diameter dimension of the joint end of the rear side exhaust pipe.

このように設定していると、仮に排気補助装置とリア側排気管との接合部分が分離した状態でリア側排気管が横方向に揺れ動いたとしても、このリア側排気管の接合端が、落下防止部と車体の上向き凹部の内側面との離隔部分から下に抜け落ちることが防止される。   With this setting, even if the rear exhaust pipe swings laterally with the joint between the exhaust auxiliary device and the rear exhaust pipe separated, the joint end of the rear exhaust pipe is It is prevented that the drop prevention part and the inner side surface of the upward concave portion of the vehicle body fall out downward.

本発明は、エンジンに取り付けられる排気管と、この排気管の途中に設置されかつ車体に吊り下げられる排気補助装置とを備え、かつ前記排気補助装置の排気流れ方向の上流側または下流側の少なくとも一方が溶接により排気管に接合されている排気装置において、比較的安価な対策で、排気補助装置と排気管との接合部分が万一分離したときでも、排気管の接合端が垂れ下がって路面に干渉することを回避できるようになる。   The present invention comprises an exhaust pipe attached to an engine, and an exhaust auxiliary device installed in the middle of the exhaust pipe and suspended from a vehicle body, and at least upstream or downstream in the exhaust flow direction of the exhaust auxiliary device. In the exhaust system, one of which is joined to the exhaust pipe by welding, even if the joint part between the exhaust auxiliary device and the exhaust pipe is separated by a relatively inexpensive measure, the joint end of the exhaust pipe hangs down on the road surface. Interference can be avoided.

本発明に係る排気装置の一実施形態で、その概略構成を示す側面図である。1 is a side view showing a schematic configuration of an exhaust device according to an embodiment of the present invention. 図１の要部を拡大して示す側面図である。It is a side view which expands and shows the principal part of FIG. 図１の排気補助装置とリア側排気管とを分離して示す斜視図である。It is a perspective view which isolate | separates and shows the exhaust auxiliary device of FIG. 1, and a rear side exhaust pipe. 図２の（４）−（４）線断面の矢視図である。FIG. 3 is a cross-sectional view taken along line (4)-(4) in FIG. 2. 図２において排気補助装置とリア側排気管とが分離したときの様子を示す図である。It is a figure which shows a mode when an exhaust auxiliary device and a rear side exhaust pipe are isolate | separated in FIG. 図４において排気補助装置とリア側排気管とが分離したときのリア側排気管の横方向の動きを示す図である。FIG. 5 is a diagram illustrating a lateral movement of the rear side exhaust pipe when the exhaust assist device and the rear side exhaust pipe are separated from each other in FIG. 4. 本発明に係る排気装置の他実施形態で、図４に対応する図である。FIG. 5 is a view corresponding to FIG. 4 in another embodiment of the exhaust device according to the present invention. 本発明に係る排気装置の他実施形態で、排気補助装置とリア側排気管とを分離して示す斜視図である。FIG. 6 is a perspective view showing an exhaust auxiliary device and a rear side exhaust pipe separately in another embodiment of the exhaust device according to the present invention. 図８の実施形態において要部を拡大して示す側面図である。It is a side view which expands and shows the principal part in embodiment of FIG. 図９の（１０）−（１０）線断面の矢視図である。FIG. 10 is a cross-sectional view taken along line (10)-(10) in FIG. 9. 図９において排気補助装置とリア側排気管とが分離したときの様子を示す図である。It is a figure which shows a mode when an exhaust auxiliary device and a rear side exhaust pipe have isolate | separated in FIG. 図１０において排気補助装置とリア側排気管とが分離したときのリア側排気管の横方向の動きを示す図である。It is a figure which shows the movement of the horizontal direction of a rear side exhaust pipe when an exhaust auxiliary device and a rear side exhaust pipe isolate | separate in FIG.

以下、本発明を実施するための最良の実施形態について添付図面を参照して詳細に説明する。   BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

図１から図６に、本発明の一実施形態を示している。図中、１はエンジン、２はフロント側排気管、３は排気補助装置、４はリア側排気管、５はリアマフラーである。フロント排気管２、排気補助装置３、リア側排気管４、リアマフラー５により排気装置が構成されている。   1 to 6 show an embodiment of the present invention. In the figure, 1 is an engine, 2 is a front side exhaust pipe, 3 is an exhaust assist device, 4 is a rear side exhaust pipe, and 5 is a rear muffler. The front exhaust pipe 2, the exhaust auxiliary device 3, the rear side exhaust pipe 4, and the rear muffler 5 constitute an exhaust device.

フロント排気管２は、この実施形態において、図示省略しているが、排気マニホールドを含んだ構成になっているものとする。排気補助装置３は、消音器や触媒コンバータなどとされる。リアマフラー５は、リア側排気管４において排気流れ方向の終端に設置されている。   Although the front exhaust pipe 2 is not shown in this embodiment, it is assumed that the front exhaust pipe 2 includes an exhaust manifold. The exhaust assist device 3 is a silencer, a catalytic converter, or the like. The rear muffler 5 is installed at the end of the rear exhaust pipe 4 in the exhaust flow direction.

そして、排気補助装置３は、フロント側排気管２およびリア側排気管４より大きな外形とされている。この実施形態では排気補助装置３は楕円筒形状とされている。   The exhaust auxiliary device 3 has a larger outer shape than the front side exhaust pipe 2 and the rear side exhaust pipe 4. In this embodiment, the exhaust assist device 3 has an elliptical cylindrical shape.

この排気補助装置３の排気流れ方向の上流側および下流側は、フロント側排気管２およびリア側排気管４と略同径の小径筒３ａ，３ｂとされている。この上流側小径筒３ａがフロント側排気管２に、また、下流側小径筒３ｂがリア側排気管４にそれぞれ溶接により接合されている。フロント側接合部に符号８ａを、また、リア側接合部に符号８ｂを付している。   The upstream side and the downstream side of the exhaust auxiliary device 3 in the exhaust flow direction are small diameter cylinders 3a and 3b having substantially the same diameter as the front side exhaust pipe 2 and the rear side exhaust pipe 4. The upstream side small diameter cylinder 3a is joined to the front side exhaust pipe 2, and the downstream side small diameter cylinder 3b is joined to the rear side exhaust pipe 4 by welding. Reference numeral 8a is attached to the front side joint, and reference numeral 8b is attached to the rear side joint.

また、排気補助装置３は、支持部材６を介して車体１０に吊り下げられる形で支持されている。さらに、リアマフラー５は、支持部材７を介して車体１０に吊り下げられる形で支持されている。   Further, the exhaust assist device 3 is supported by being suspended from the vehicle body 10 via a support member 6. Further, the rear muffler 5 is supported in such a manner that it is suspended from the vehicle body 10 via the support member 7.

これらの支持部材６，７は、例えばゴムなどの弾性体からなる。フロント側支持部材６の上側貫通孔には車体１０に取り付けられるフックバー１２が挿通されており、また、フロント側支持部材６の下側貫通孔には排気補助装置３に取り付けられるフックバー３ｃが挿通されるようになっている。リア側支持部材７の上側貫通孔には車体１０に取り付けられるフックバー１３が挿通されており、また、リア側支持部材７の下側貫通孔にはリアマフラー５に取り付けられるフックバー５ａが挿通されるようになっている。   These support members 6 and 7 are made of an elastic body such as rubber, for example. A hook bar 12 attached to the vehicle body 10 is inserted into the upper through hole of the front support member 6, and a hook bar 3 c attached to the exhaust assist device 3 is inserted into the lower through hole of the front support member 6. It has become so. A hook bar 13 attached to the vehicle body 10 is inserted into the upper through hole of the rear side support member 7, and a hook bar 5 a attached to the rear muffler 5 is inserted into the lower through hole of the rear side support member 7. It has become.

なお、排気補助装置３およびリア側排気管４は、この実施形態において、図４に示すように、車体１０の底部に設置される上向き凹部１１内に非接触で配置されている。   In this embodiment, the exhaust assist device 3 and the rear side exhaust pipe 4 are disposed in a non-contact manner in an upward recess 11 installed at the bottom of the vehicle body 10 as shown in FIG.

このような排気装置において、排気補助装置３と特にリア側排気管４との接合部８ｂが万一分離したときに、このリア側排気管４の接合端が垂れ下がって甚だしい場合には路面に干渉することになりかねない。そもそも、リア側排気管４が車体１０に支持されていないうえ、このリア側排気管４の排気流れ方向の終端側に設置しているリアマフラー５が車体１０に支持されているために、前記リア側接合部８ｂが分離すると、リアマフラー５の支持部材７を支点として、リア側排気管４が前傾して垂れ下がるようになる。なお、フロント側排気管２は、エンジン１に取り付けられている関係より、排気補助装置３とフロント側排気管２と接合部８ａが万一分離したときでも、フロント側排気管２が垂れ下がることはない。   In such an exhaust device, when the joint portion 8b between the exhaust auxiliary device 3 and the rear side exhaust pipe 4 is separated, if the joint end of the rear side exhaust pipe 4 droops, it interferes with the road surface. Could end up. In the first place, the rear exhaust pipe 4 is not supported by the vehicle body 10, and the rear muffler 5 installed on the terminal end side in the exhaust flow direction of the rear exhaust pipe 4 is supported by the vehicle body 10. When the side joint portion 8b is separated, the rear side exhaust pipe 4 hangs forward and hangs around the support member 7 of the rear muffler 5 as a fulcrum. Since the front exhaust pipe 2 is attached to the engine 1, the front exhaust pipe 2 may hang down even if the exhaust auxiliary device 3, the front exhaust pipe 2, and the joint 8a are separated. Absent.

このような事情を考慮し、リア側排気管４の接合端が垂れ下がることを回避する対策として、以下のような構成を採用している。   In consideration of such circumstances, the following configuration is adopted as a countermeasure for preventing the joint end of the rear side exhaust pipe 4 from sagging.

具体的に、リア側排気管４の接合端寄りには、落下防止部１５が取り付けられている。この落下防止部１５は、排気補助装置３と特にリア側排気管４とのリア側接合部８ｂが万一分離したときに排気補助装置３の下流側小径筒３ｂに引っ掛かるような形状に形成されている。つまり、落下防止部１５は、リア側排気管４の接合端寄りの鉛直方向上側に設置されていて、排気補助装置３の下流側小径筒３ｂに向けて延びる形状とされている。   Specifically, a fall prevention unit 15 is attached near the joining end of the rear side exhaust pipe 4. This fall prevention part 15 is formed in such a shape as to be caught by the downstream small-diameter cylinder 3b of the exhaust auxiliary device 3 when the rear side joint 8b between the exhaust auxiliary device 3 and in particular the rear side exhaust pipe 4 is separated. ing. That is, the fall prevention unit 15 is installed on the upper side in the vertical direction near the joining end of the rear side exhaust pipe 4 and has a shape extending toward the downstream side small diameter cylinder 3 b of the exhaust assist device 3.

落下防止部１５は、耐熱性に優れた材料（例えば金属材、エンジニアリングプラスチックなど）の板状部材からなり、その先端部分は、下向きに開いた状態の半円筒形に形成されている。この半円筒形部分１５ａの曲率半径は、リア側排気管４の曲率半径および排気補助装置３の下流側小径筒３ｂよりも大きく設定されている。この落下防止部１５は、リア側排気管４の接合端寄りの鉛直方向上側に接合されている。   The fall prevention unit 15 is made of a plate-like member made of a material having excellent heat resistance (for example, a metal material, an engineering plastic, etc.), and a tip portion thereof is formed in a semi-cylindrical shape opened downward. The radius of curvature of the semi-cylindrical portion 15 a is set to be larger than the radius of curvature of the rear side exhaust pipe 4 and the downstream side small diameter cylinder 3 b of the exhaust assist device 3. The fall prevention portion 15 is joined to the upper side in the vertical direction near the joining end of the rear side exhaust pipe 4.

このような落下防止部１５を備えている場合には、排気補助装置３とリア側排気管４との接合部８ｂが万一分離したとすると、リアマフラー５の支持部材７を支点として、リア側排気管４が前傾して垂れ下がるようになるものの、このリア側排気管４の接合端に設置している落下防止部１５が、図５に示すように、排気補助装置３の下流側小径筒３ｂの上半分に覆い被さるような形態で引っ掛かることになる。   In the case where such a fall prevention unit 15 is provided, assuming that the joint 8b between the exhaust auxiliary device 3 and the rear exhaust pipe 4 is separated, the rear side of the rear muffler 5 is supported by the support member 7 as a fulcrum. Although the exhaust pipe 4 tilts forward and hangs down, the fall prevention portion 15 installed at the joint end of the rear side exhaust pipe 4 has a downstream small-diameter cylinder of the exhaust auxiliary device 3 as shown in FIG. It will be caught in a form that covers the upper half of 3b.

そのために、リア側排気管４の接合端が若干垂れ下がるものの、排気補助装置３に引っ掛かって、それよりも下に大きく垂れ下がらずに済むようになる。したがって、このように分離しても、リア側排気管４の接合端が路面に干渉せずに済むので、例えば修理工場まで支障なく車両を自走搬送することが可能になる。   Therefore, although the joint end of the rear side exhaust pipe 4 slightly hangs down, it does not have to be caught by the exhaust assisting device 3 and drastically drop below it. Therefore, even if it separates in this way, since the joint end of the rear side exhaust pipe 4 does not interfere with the road surface, for example, the vehicle can be self-propelled and conveyed to a repair shop without any trouble.

ところで、図４に示すように、半円筒形部分１５ａの円周方向両端の離隔寸法Ｌ１を、排気補助装置３の下流側小径筒３ｂと車体１０の上向き凹部１１の内側面との離隔寸法Ａ１，Ｂ１よりも大きく設定している。   By the way, as shown in FIG. 4, the separation dimension L1 at both ends in the circumferential direction of the semi-cylindrical portion 15a is set to the separation dimension A1 between the downstream small-diameter cylinder 3b of the exhaust assisting device 3 and the inner surface of the upward recess 11 of the vehicle body 10. , B1 is set larger.

このように設定していると、仮に図６に示すように、排気補助装置３とリア側排気管４とのリア側接合部８ｂが分離した状態でリア側排気管４が横方向に揺れ動いたとしても、このリア側排気管４の接合端に設置している落下防止部１５が、排気補助装置３の下流側小径筒３ｂと車体１０の上向き凹部１１の内側面との離隔部分から下に抜け落ちることが防止される。   With this setting, as shown in FIG. 6, the rear side exhaust pipe 4 sways in the lateral direction with the rear side joint portion 8b between the exhaust auxiliary device 3 and the rear side exhaust pipe 4 separated. However, the fall prevention part 15 installed at the joint end of the rear side exhaust pipe 4 is located below the separation part between the downstream side small diameter cylinder 3b of the exhaust auxiliary device 3 and the inner side surface of the upward recess 11 of the vehicle body 10. It is prevented from falling out.

以上説明したように本発明を適用した実施形態では、排気補助装置３とリア側排気管４との接合部８ｂが、万一分離するようなことがあっても、リア側排気管４の接合端が垂れ下がって路面に干渉することを回避できるようになる。しかも、落下防止部１５を板状の部材を加工したようなものとしていて、特殊なものを使用しないで済むから、排気装置を廉価に提供できるようになる。   As described above, in the embodiment to which the present invention is applied, even if the joint portion 8b between the exhaust assist device 3 and the rear side exhaust pipe 4 may be separated, the rear side exhaust pipe 4 is joined. It becomes possible to avoid that the end hangs down and interferes with the road surface. In addition, since the fall prevention unit 15 is made by processing a plate-like member and a special one is not required, the exhaust device can be provided at low cost.

なお、本発明は、上記実施形態のみに限定されるものではなく、特許請求の範囲内および当該範囲と均等の範囲内で適宜に変更することが可能である。   In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

（１）上記実施形態では、落下防止部１５を半円筒形のような形状にした場合を例に挙げているが、本発明はこれに限定されない。   (1) In the said embodiment, although the case where the fall prevention part 15 was made into the shape like a semi-cylindrical shape was mentioned as an example, this invention is not limited to this.

例えば図７に示すように、落下防止部１５の形状は、単純に平板形状とすることが可能である。このようにした場合でも、上記実施形態と同様に、平板形状部分の横方向全幅寸法Ｌ１を、排気補助装置３の下流側小径筒３ｂと車体１０の上向き凹部１１の内側面との離隔寸法Ａ１，Ｂ１よりも大きく設定するのが好ましい。   For example, as shown in FIG. 7, the shape of the fall prevention part 15 can be simply a flat plate shape. Even in this case, as in the above-described embodiment, the lateral full width dimension L1 of the flat plate-shaped portion is set to the separation dimension A1 between the downstream small-diameter cylinder 3b of the exhaust assist device 3 and the inner surface of the upward recess 11 of the vehicle body 10. , B1 is preferably set larger than B1.

また、例えば図８に示すように、落下防止部１５は、棒状の部材を湾曲してリア側排気管４の接合端に取り付け、この棒状の落下防止部１５の突出端を、排気補助装置３の下流側小径筒３ｂに引っ掛かるように湾曲させた形状とすることが可能である。   For example, as shown in FIG. 8, the fall prevention unit 15 has a rod-like member bent and attached to the joining end of the rear side exhaust pipe 4, and the protruding end of the rod-like fall prevention unit 15 is connected to the exhaust assist device 3. It is possible to make the shape curved so as to be caught by the downstream small diameter cylinder 3b.

（２）上記実施形態では、リア側排気管４に落下防止部１５を設置した場合を例に挙げているが、本発明はこれに限定されない。例えば図９から図１２に示すように、落下防止部１５を排気補助装置３側に設置することが可能である。   (2) Although the case where the fall prevention part 15 is installed in the rear side exhaust pipe 4 is given as an example in the above embodiment, the present invention is not limited to this. For example, as shown in FIGS. 9 to 12, the fall prevention unit 15 can be installed on the exhaust assist device 3 side.

その場合、落下防止部１５は、排気補助装置３の鉛直方向下側に設置されていて、リア側排気管４に向けて延びる形状とされている。この落下防止部１５は、板状の部材からなり、その先端部分は、上向きに開いた状態の半円筒形に形成されている。この半円筒形部分１５ａの曲率半径は、排気補助装置３の下流側小径筒３ｂおよびリア側排気管４の曲率半径よりも大きく設定されている。   In this case, the fall prevention unit 15 is installed on the lower side in the vertical direction of the exhaust assist device 3 and has a shape extending toward the rear exhaust pipe 4. This fall prevention part 15 consists of a plate-shaped member, The front-end | tip part is formed in the semi-cylindrical shape of the state opened upward. The radius of curvature of the semi-cylindrical portion 15 a is set to be larger than the radius of curvature of the downstream side small diameter cylinder 3 b and the rear side exhaust pipe 4 of the exhaust assist device 3.

このような落下防止部１５を備えている場合には、排気補助装置３とリア側排気管４との接合部８ｂが万一分離したとすると、図１１に示すように、リアマフラー５の支持部材７を支点として、リア側排気管４が前傾して垂れ下がるようになるものの、リア側排気管４の接合端が、排気補助装置３の下側に設置している落下防止部１５の上向きに開く凹部内に入り込んで受け止められるような形態で引っ掛かることになる。   In the case where such a fall prevention part 15 is provided, if the joint part 8b between the exhaust auxiliary device 3 and the rear side exhaust pipe 4 is separated, the support member for the rear muffler 5 as shown in FIG. 7, the rear side exhaust pipe 4 tilts forward and hangs down, but the joint end of the rear side exhaust pipe 4 faces upward to the fall prevention unit 15 installed on the lower side of the exhaust assist device 3. It will be caught in a form that can enter and be received in the recess that opens.

そのために、リア側排気管４の接合端が若干垂れ下がるものの、排気補助装置３に設置している落下防止部１５に引っ掛かって、それよりも下に大きく垂れ下がらずに済むようになる。したがって、このように分離しても、リア側排気管４の接合端が路面に干渉せずに済むので、修理工場まで支障なく車両を自走搬送することが可能になる。   For this reason, although the joint end of the rear side exhaust pipe 4 slightly hangs down, it does not have to be caught by the fall prevention part 15 installed in the exhaust assist device 3 and hang down greatly below that. Therefore, even if it separates in this way, since the joint end of the rear side exhaust pipe 4 does not interfere with the road surface, the vehicle can be self-propelled and conveyed to the repair shop without any trouble.

ところで、図１０に示すように、半円筒形部分１５ａの円周方向一端と車体１０の上向き凹部１１の内側面との離隔寸法をＡ２、半円筒形部分１５ａの円周方向他端と車体１０の上向き凹部１１の内側面との離隔寸法をＢ２、リア側排気管４の接合端の直径寸法をＬ２とすると、Ａ２＜Ｌ２、Ｂ２＜Ｌ２の関係に設定している。   By the way, as shown in FIG. 10, the distance between the circumferential end of the semicylindrical portion 15a and the inner surface of the upward recess 11 of the vehicle body 10 is A2, the other circumferential end of the semicylindrical portion 15a and the vehicle body 10 are separated. Assuming that the distance from the inner surface of the upward recess 11 is B2, and the diameter of the joint end of the rear side exhaust pipe 4 is L2, the relationship of A2 <L2 and B2 <L2 is set.

このように設定していると、仮に図１２に示すように、排気補助装置３とリア側排気管４との接合部８ｂが分離した状態でリア側排気管４が横方向に揺れ動いたとしても、このリア側排気管４の接合端が、落下防止部１５と車体１０の上向き凹部１１の内側面との離隔部分から下に抜け落ちることが防止される。   With this setting, as shown in FIG. 12, even if the rear side exhaust pipe 4 sways laterally with the joint portion 8b between the exhaust auxiliary device 3 and the rear side exhaust pipe 4 separated. The joint end of the rear side exhaust pipe 4 is prevented from falling down from the separation portion between the fall prevention portion 15 and the inner side surface of the upward recess 11 of the vehicle body 10.

なお、この（２）の実施形態で説明したような落下防止部１５についても、前記（１）の実施形態で説明したように平板形状や棒状とすることが可能である。   Note that the fall prevention unit 15 as described in the embodiment of (2) can also be formed into a flat plate shape or a rod shape as described in the embodiment of (1).

本発明は、エンジンに取り付けられる排気管と、この排気管の途中に設置されかつ車体に吊り下げられる排気補助装置とを備え、かつ前記排気補助装置の排気流れ方向の上流側または下流側の少なくとも一方が溶接により排気管に接合されている排気装置に適用することが可能である。   The present invention comprises an exhaust pipe attached to an engine, and an exhaust auxiliary device installed in the middle of the exhaust pipe and suspended from a vehicle body, and at least upstream or downstream in the exhaust flow direction of the exhaust auxiliary device. It is possible to apply to an exhaust device in which one is joined to the exhaust pipe by welding.

１ エンジン
２ フロント側排気管
３ 排気補助装置
３ａ 排気補助装置の上流側小径筒
３ｂ 排気補助装置の下流側小径筒
３ｃ 排気補助装置のフックバー
４ リア側排気管
６ フロント側支持部材
８ｂ リア側接合部
１０ 車体
１２ 車体のフックバー
１５ 落下防止部
１５ａ 半円筒形部分 1 engine
2 Front exhaust pipe
3 Exhaust assist device
3a Upstream small-diameter cylinder of exhaust auxiliary device
3b Small diameter cylinder on the downstream side of the exhaust assist device
3c Hook bar of exhaust assist device
4 Rear exhaust pipe
6 Front support member
8b Rear side joint 10 Body 12 Hook bar 15 Drop prevention part 15a Semi-cylindrical part

Claims (5)

エンジンに取り付けられる排気管と、この排気管の途中に設置されかつ車体に吊り下げられる排気補助装置とを備え、かつ前記排気補助装置の排気流れ方向の上流側または下流側の少なくとも一方が溶接により排気管に接合されている排気装置であって、
前記排気補助装置または当該排気補助装置が接合される排気管の少なくともいずれか一方に、前記接合部が分離したときに残り他方に引っ掛かる落下防止部が設けられている、ことを特徴とする排気装置。 An exhaust pipe attached to the engine and an exhaust auxiliary device installed in the middle of the exhaust pipe and suspended from the vehicle body, and at least one of the exhaust auxiliary direction upstream or downstream of the exhaust auxiliary device is welded An exhaust device joined to the exhaust pipe,
At least one of the exhaust assist device or the exhaust pipe to which the exhaust assist device is joined is provided with a fall prevention portion that is hooked to the other when the joined portion is separated. . 請求項１に記載の排気装置において、
前記排気補助装置の排気流れ方向下流側がリア側排気管に接合されており、
前記落下防止部は、前記リア側排気管の接合端の鉛直方向上側に設置されていて、前記排気補助装置に向けて延びる形状とされている、ことを特徴とする排気装置。 The exhaust device according to claim 1,
The exhaust auxiliary direction downstream side of the exhaust auxiliary device is joined to the rear exhaust pipe,
The exhaust device according to claim 1, wherein the fall prevention unit is installed on a vertically upper side of a joint end of the rear side exhaust pipe and extends toward the exhaust auxiliary device. 請求項２に記載の排気装置において、
前記排気補助装置および前記リア側排気管は、車体の底部に設置される上向き凹部内に非接触で配置されており、
前記落下防止部の先端部分は、下向きに開いた状態の半円筒形に形成されており、
この半円筒形部分の円周方向両端の離隔寸法は、前記排気補助装置の排気流れ方向下流側接合端と前記上向き凹部の内側面との離隔寸法よりも大きく設定されている、ことを特徴とする排気装置。 The exhaust device according to claim 2,
The exhaust assist device and the rear side exhaust pipe are arranged in a non-contact manner in an upward concave portion installed at the bottom of the vehicle body,
The tip part of the fall prevention part is formed in a semi-cylindrical shape that is opened downward,
The separation dimension at both ends in the circumferential direction of the semi-cylindrical part is set to be larger than the separation dimension between the downstream joint end in the exhaust flow direction of the exhaust auxiliary device and the inner surface of the upward recess. Exhaust system. 請求項１に記載の排気装置において、
前記排気補助装置の排気流れ方向下流側がリア側排気管に接合されており、
前記落下防止部は、前記排気補助装置の鉛直方向下側に設置されていて、前記リア側排気管に向けて延びる形状とされている、ことを特徴とする排気装置。 The exhaust device according to claim 1,
The exhaust auxiliary direction downstream side of the exhaust auxiliary device is joined to the rear exhaust pipe,
The exhaust device according to claim 1, wherein the fall prevention unit is installed on a lower side in the vertical direction of the exhaust assist device and extends toward the rear exhaust pipe. 請求項４に記載の排気装置において、
前記排気補助装置および前記リア側排気管は、車体の底部に設置される上向き凹部内に非接触で配置されており、
前記落下防止部の先端部分は、上向きに開いた状態の半円筒形に形成されており、
前記半円筒形部分の円周方向一端と上向き凹部の内側面との離隔寸法、および前記半円筒形部分の円周方向他端と上向き凹部の内側面との離隔寸法は、前記リア側排気管の接合端の直径寸法よりも小さく設定されている、ことを特徴とする排気装置。 The exhaust device according to claim 4,
The exhaust assist device and the rear side exhaust pipe are arranged in a non-contact manner in an upward concave portion installed at the bottom of the vehicle body,
The tip part of the fall prevention part is formed in a semi-cylindrical shape that is open upward,
The distance between the circumferential end of the semi-cylindrical portion and the inner surface of the upward recess, and the distance between the other circumferential end of the semi-cylindrical portion and the inner surface of the upward recess are the rear exhaust pipe. An exhaust device characterized in that the exhaust device is set to be smaller than the diameter dimension of the joint end.
JP2010260908A 2010-11-24 2010-11-24 Exhaust system Expired - Fee Related JP5158182B2 (en)

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CN201180021910.2A CN102869866B (en) 2010-11-24 2011-11-24 Gas extraction system
PCT/IB2011/002962 WO2012069922A1 (en) 2010-11-24 2011-11-24 Exhaust system

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