JP2006036133A - Vehicular exhaust device - Google Patents

Vehicular exhaust device Download PDF

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Publication number
JP2006036133A
JP2006036133A JP2004222198A JP2004222198A JP2006036133A JP 2006036133 A JP2006036133 A JP 2006036133A JP 2004222198 A JP2004222198 A JP 2004222198A JP 2004222198 A JP2004222198 A JP 2004222198A JP 2006036133 A JP2006036133 A JP 2006036133A
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Prior art keywords
fuel tank
exhaust pipe
vehicle
downstream
upstream
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JP2004222198A
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JP4547613B2 (en
Inventor
Shuichi Kawase
修一 川瀬
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2004222198A priority Critical patent/JP4547613B2/en
Priority to CNB2005100830499A priority patent/CN100360331C/en
Priority to CNU2005201136344U priority patent/CN2821174Y/en
Priority to DE200510034638 priority patent/DE102005034638B4/en
Publication of JP2006036133A publication Critical patent/JP2006036133A/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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • 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
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • 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
    • 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
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank

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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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular exhaust device capable of suppressing local deformation of a fuel tank and preventing damage thereto by allowing a connection part of a smoothly curved surface to be collided with the fuel tank ahead in a rear-end collision of a vehicle. <P>SOLUTION: The vehicular exhaust device comprises a fuel tank mounted on a vehicle, and an exhaust pipe extending backward of the vehicle over the arrangement position of the fuel tank, the exhaust pipe includes an inclined part facing a rear side of the fuel tank in the middle of a path, an upstream side flange and a downstream side flange to divide the exhaust pipe into an upstream side exhaust pipe and a downstream side exhaust pipe are provided on the inclined part, and each outer edge of both flanges faces the fuel tank. A plurality of projection parts having a fastening part are provided on each outer edge of both flanges, and the projection parts are connected to each other by a connection part of a smoothly curved face, and the flanges are positioned in the circumferential direction of the exhaust pipe so that the continuous part faces the fuel tank. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は車両の排気装置に係り、特に、車両の後突時には傾斜のなだらかな曲面の連絡部が前方の燃料タンクに衝突することによって、燃料タンクの局部的な変形が抑制されて損傷を防止することができる車両の排気装置に関する。   The present invention relates to an exhaust system of a vehicle, and in particular, when a vehicle has a rear impact, a sloping curved connecting portion collides with a fuel tank in front, thereby suppressing local deformation of the fuel tank and preventing damage. The present invention relates to an exhaust device for a vehicle.

車両には、搭載される内燃機関の排気を外部に導くために、排気装置を設けている。従来の車両の排気装置としては、図１１に示すものがある。図１１において、１０２は車両、１０４は燃料タンクである。車両１０２は、前側に図示しない内燃機関と変速機を搭載し、後側に燃料タンク１０４を搭載している。   The vehicle is provided with an exhaust device in order to guide the exhaust of the internal combustion engine to be mounted to the outside. A conventional vehicle exhaust system is shown in FIG. In FIG. 11, reference numeral 102 denotes a vehicle, and 104 denotes a fuel tank. The vehicle 102 has an internal combustion engine and a transmission (not shown) mounted on the front side, and a fuel tank 104 mounted on the rear side.

内燃機関の排気を導く排気装置１０６は、燃料タンク１０４の配設位置を超えて車両１０２の後方に延びる排気管１０８を設けている。排気管１０８は、燃料タンク１０４の下部を通過した後に、軸線を車両１０２の上方に屈曲され、更に車両１０２の右側に屈曲され、後端を車両１０２の右側後部に位置する消音器１１０に接続される。   An exhaust device 106 that guides the exhaust of the internal combustion engine is provided with an exhaust pipe 108 that extends beyond the position where the fuel tank 104 is disposed and extends rearward of the vehicle 102. After passing through the lower part of the fuel tank 104, the exhaust pipe 108 is bent at the axis above the vehicle 102, further bent at the right side of the vehicle 102, and connected to the silencer 110 located at the rear right side of the vehicle 102 at the rear end. Is done.

車両１０２の排気装置１０６は、排気管１０８の経路途中の燃料タンク１０４と消音器１１０との間に、車両１０２の幅方向中央の下方から幅方向右側の斜め上後方に向かい、燃料タンク１０４の後面１１２に対峙する傾斜部１１４が形成される。傾斜部１１４は、燃料タンク１０４の後面１１２に対峙しているため、燃料タンク１０４に衝突しても損傷を与えないようにする配慮が必要である。   The exhaust device 106 of the vehicle 102 is located between the fuel tank 104 and the silencer 110 in the middle of the exhaust pipe 108 from the lower side of the center in the width direction of the vehicle 102 toward the upper side of the right side in the width direction. An inclined portion 114 facing the rear surface 112 is formed. Since the inclined portion 114 faces the rear surface 112 of the fuel tank 104, it is necessary to take care not to damage it even if it collides with the fuel tank 104.

従来の車両の排気装置としては、燃料タンクの下方にサイレンサを配設した場合において、サイレンサから車両後方に延びる排気管に燃料タンク後端付近においてゆるやかに上方に傾斜する部分を設け、サイレンサの前端を燃料タンク前方の車体部分の下方に配置し、車両が追突された場合にサイレンサが燃料タンクから離れる方向に変位させ、破損を防止するものがある。
特開平６−３３７５７号公報 As a conventional vehicle exhaust system, when a silencer is disposed below the fuel tank, an exhaust pipe extending from the silencer to the rear of the vehicle is provided with a portion gently inclined upward near the rear end of the fuel tank so that the front end of the silencer Is disposed below the vehicle body part in front of the fuel tank, and when the vehicle collides, the silencer is displaced in a direction away from the fuel tank to prevent damage.
JP-A-6-33757

また、従来の車両の排気装置としては、燃料タンクにマフラを隣接し且つ傾斜させて配置し、燃料タンクに対向するマフラの角部を覆う保護部材をマフラ及び排気管に結合し、保護部材によってマフラ及び排気管の結合強度及び剛性を高め、マフラが燃料タンクに干渉した場合に、保護部材によって燃料タンクへの応力集中を緩和して変形を防止するものがある。
特開２００３−３８３８号公報 Further, as a conventional vehicle exhaust system, a muffler is disposed adjacent to and inclined at a fuel tank, and a protective member that covers a corner of the muffler facing the fuel tank is coupled to the muffler and the exhaust pipe. In some cases, the coupling strength and rigidity of the muffler and the exhaust pipe are increased, and when the muffler interferes with the fuel tank, the stress concentration on the fuel tank is reduced by the protective member to prevent deformation.
JP 2003-3838 A

ところで、前記図１１に示す車両１０２の排気装置１０６は、排気管１０８の経路途中の燃料タンク１０４と消音器１１０との間に、燃料タンク１０４の後面１１２に対峙する傾斜部１１４が形成される。この傾斜部１１４は、上流側排気管１１６−１と下流側排気管１１６−２とに分割され、各側排気管１１６−１・１１６−２に夫々接続用の上流側フランジ１１８−１と下流側フランジ１１８−２とを設けている。   By the way, in the exhaust device 106 of the vehicle 102 shown in FIG. 11, an inclined portion 114 facing the rear surface 112 of the fuel tank 104 is formed between the fuel tank 104 and the silencer 110 in the middle of the path of the exhaust pipe 108. . The inclined portion 114 is divided into an upstream exhaust pipe 116-1 and a downstream exhaust pipe 116-2, and an upstream flange 118-1 and a downstream for connection to the respective exhaust pipes 116-1 and 116-2. A side flange 118-2 is provided.

ところが、排気装置１０６は、燃料タンク１０４に対峙する排気管１０８の傾斜部１１４に上流側フランジ１１８−１と下流側フランジ１１８−２とを設けた場合に、両フランジ１１８−１・１１８−２の上流側・下流側外縁部１２０−１・１２０−２が燃料タンク１０４に対峙するため、車両１０２に後方から大きな外力が作用される後突時に、両フランジ１１８−１・１１８−２の各外縁部１２０−１・１２０−２が燃料タンク１０４に衝突し、燃料タンク１０４に損傷を与えるおそれがあった。   However, when the exhaust device 106 is provided with the upstream flange 118-1 and the downstream flange 118-2 on the inclined portion 114 of the exhaust pipe 108 facing the fuel tank 104, both flanges 118-1 and 118-2 are provided. Since the upstream and downstream outer edges 120-1 and 120-2 face the fuel tank 104, each of the flanges 118-1 and 118-2 is subjected to a rear collision when a large external force is applied to the vehicle 102 from the rear. The outer edge portions 120-1 and 120-2 may collide with the fuel tank 104 and damage the fuel tank 104.

この発明は、車両に搭載される燃料タンクと、この燃料タンクの配設位置を越えて前記車両の後方に延びる排気管とを設け、この排気管は経路途中に前記燃料タンクの後面に対峙する傾斜部を含み、この傾斜部に前記排気管を上流側排気管と下流側排気管とに分割する上流側フランジと下流側フランジとを設け、前記両フランジの各外縁部が前記燃料タンクに対峙する車両の排気装置において、前記両フランジの各外縁部には夫々締結部を備える突出部が複数個設けられるとともに、各突出部の間がなだらかな曲面の連絡部で連絡され、この連絡部が前記燃料タンクに対峙するよう前記両フランジを前記排気管の周方向に位置決めしたことを特徴とする。   According to the present invention, a fuel tank mounted on a vehicle and an exhaust pipe extending beyond the position where the fuel tank is disposed and extending rearward of the vehicle are provided, and the exhaust pipe faces the rear surface of the fuel tank in the middle of the path. The inclined portion includes an upstream flange and a downstream flange that divide the exhaust pipe into an upstream exhaust pipe and a downstream exhaust pipe. The outer edge portions of both flanges face the fuel tank. In the exhaust system of the vehicle, a plurality of protrusions each having a fastening portion are provided on each outer edge portion of the both flanges, and between the protrusions are communicated with a gently curved connecting portion. The both flanges are positioned in the circumferential direction of the exhaust pipe so as to face the fuel tank.

この発明の車両の排気装置は、燃料タンクの後面に対峙する排気管の傾斜部を上流側排気管と下流側排気管とに分割する上流側フランジと下流側フランジとを設け、両フランジの各外縁部が燃料タンクに対峙する車両の排気装置において、両フランジの各外縁部には夫々締結部を備える突出部が複数個設けられるとともに、各突出部の間がなだらかな曲面の連絡部で連絡され、この連絡部が燃料タンクに対峙するよう両フランジを排気管の周方向に位置決めしたことにより、車両の後突時には傾斜のなだらかな曲面の連絡部が前方の燃料タンクに衝突することになり、燃料タンクの局部的な変形が抑制されて損傷を防止することができる。   An exhaust system for a vehicle according to the present invention includes an upstream flange and a downstream flange that divide an inclined portion of an exhaust pipe facing a rear surface of a fuel tank into an upstream exhaust pipe and a downstream exhaust pipe. In the exhaust system of a vehicle whose outer edge faces the fuel tank, each outer edge of both flanges is provided with a plurality of protrusions each having a fastening portion, and communication between the protrusions is made with a gently curved connecting portion. Since the flanges are positioned in the circumferential direction of the exhaust pipe so that the connecting portion faces the fuel tank, the gently curved connecting portion collides with the fuel tank in the front at the time of rear-end collision of the vehicle. The local deformation of the fuel tank is suppressed and damage can be prevented.

この発明の車両の排気装置は、燃料タンクの後面に対峙する排気管の傾斜部を分割して上流側フランジと下流側フランジとを設け、両フランジの各外縁部のなだらかな曲面の連絡部が燃料タンクに対峙するよう、両フランジを排気管の周方向に位置決めすることにより、車両の後突時に傾斜のなだらかな曲面の連絡部を前方の燃料タンクに衝突させ、燃料タンクの局部的な変形を抑制するものである。
以下図面に基づいて、この発明の実施例を説明する。 In the exhaust system for a vehicle according to the present invention, the inclined portion of the exhaust pipe facing the rear surface of the fuel tank is divided to provide an upstream flange and a downstream flange, and gently curved connecting portions at the outer edge portions of both flanges are provided. By positioning both flanges in the circumferential direction of the exhaust pipe so as to face the fuel tank, the curved curved connecting part collides with the front fuel tank at the time of rear-end collision of the vehicle, and local deformation of the fuel tank It suppresses.
Embodiments of the present invention will be described below with reference to the drawings.

図１〜図８は、この発明の実施例を示すものである。図８において、２は車両、４は内燃機関、６は変速機、８は燃料タンク、１０は前輪、１２は後輪である。車両２は、前側に内燃機関４と変速機６とを横置きに搭載するとともに後側に長手方向を幅方向に指向させて燃料タンク８を搭載しており、内燃機関４の駆動力を変速機６により変換して前輪１０を駆動し、走行する。   1 to 8 show an embodiment of the present invention. In FIG. 8, 2 is a vehicle, 4 is an internal combustion engine, 6 is a transmission, 8 is a fuel tank, 10 is a front wheel, and 12 is a rear wheel. The vehicle 2 has the internal combustion engine 4 and the transmission 6 mounted horizontally on the front side, and a fuel tank 8 mounted on the rear side with the longitudinal direction oriented in the width direction, and the driving force of the internal combustion engine 4 is changed. It is converted by the machine 6 to drive the front wheels 10 and travel.

前記内燃機関４の排気は、排気装置１４により外部に導かれる。排気装置１４は、車両２の略中央部位を前側から後側に向かって排気管１６を配設している。排気管１６は、車両２の前側の内燃機関４から後側に向かって、第１排気管１８と第２排気管２０と第３排気管２２とをフランジ接続部２４・２６により順次に接続してなる。   Exhaust gas from the internal combustion engine 4 is guided to the outside by an exhaust device 14. In the exhaust device 14, an exhaust pipe 16 is disposed from a front side toward a rear side in a substantially central portion of the vehicle 2. The exhaust pipe 16 connects the first exhaust pipe 18, the second exhaust pipe 20, and the third exhaust pipe 22 sequentially by flange connecting portions 24 and 26 from the internal combustion engine 4 on the front side of the vehicle 2 toward the rear side. It becomes.

燃料タンク８の配設位置を超えて後方に延びる第３排気管２２は、図１〜図４に示す如く、燃料タンク８の下部を通過した後に、軸線を車両２の上方に屈曲され、更に車両２の右側に屈曲され、後端を車両２の右側後部に位置する消音器２８に接続される。消音器２８には、テールパイプ３０を接続している。この第３排気管２２は、経路途中の燃料タンク８と消音器２８との間に、車両２の幅方向中央の下方から幅方向右側の斜め上後方に向かい、燃料タンク８の後面３２に対峙する傾斜部３４が形成される。   The third exhaust pipe 22 extending rearward beyond the position where the fuel tank 8 is disposed passes through the lower portion of the fuel tank 8 as shown in FIGS. The right end of the vehicle 2 is bent and the rear end is connected to a silencer 28 located at the right rear portion of the vehicle 2. A tail pipe 30 is connected to the silencer 28. The third exhaust pipe 22 faces the rear surface 32 of the fuel tank 8 between the fuel tank 8 and the silencer 28 in the middle of the path from the lower center in the width direction of the vehicle 2 toward the diagonally upper rear side on the right side in the width direction. An inclined portion 34 is formed.

第３排気管２２の傾斜部３４は、上流側排気管３６−１と下流側排気管３６−２とに分割され、各側排気管３６−１・３６−２にフランジ接続部３８を構成する上流側フランジ４０−１と下流側フランジ４０−２とを夫々設けている。上流側フランジ４０−１と下流側フランジ４０−２との上流側・下流側外縁部４２−１・４２−２は、図２に示す如く、燃料タンク８に対峙している。   The inclined portion 34 of the third exhaust pipe 22 is divided into an upstream exhaust pipe 36-1 and a downstream exhaust pipe 36-2, and a flange connection portion 38 is formed on each of the side exhaust pipes 36-1 and 36-2. An upstream flange 40-1 and a downstream flange 40-2 are provided. The upstream and downstream outer edge portions 42-1 and 42-2 of the upstream flange 40-1 and the downstream flange 40-2 are opposed to the fuel tank 8, as shown in FIG.

前記両フランジ４０−１・４０−２の各外縁部４２−１・４２−２には、上流側・下流側締結部４４−１・４４−２を備える上流側・下流側突出部４６−１・４６−２が複数個設けられるとともに、各突出部４６−１・４６−２の間がなだらかな曲面の上流側・下流側連絡部４８−１・４８−２で連絡されている。   The upstream and downstream protrusions 46-1 provided with upstream and downstream fastening portions 44-1 and 44-2 at the outer edge portions 42-1 and 42-2 of the flanges 40-1 and 40-2. A plurality of 46-2 are provided, and the protrusions 46-1 and 46-2 are connected to each other by gently curved upstream and downstream connecting portions 48-1 and 48-2.

この実施例における両フランジ４０−１・４０−２の各外縁部４２−１・４２−２には、図５・図６に示す如く、上流側・下流側締結部４４−１・４４−２を備える上流側・下流側突出部４６−１・４６−２が管直径方向において対向する位置に一組設けられるとともに、各突出部４６−１・４６−２の間を連絡する部位であって、各突出部４６−１・４６−２に対して直交する管直径方向において対向する位置に、なだらかな曲面の上流側・下流側連絡部４８−１・４８−２を設けている。両フランジ４０−１・４０−２は、各締結部４４−１・４４−２をボルト・ナット等の締結具５０により締結され、上流側排気管３６−１と下流側排気管３６−２とを接続する。   In this embodiment, the outer edge portions 42-1 and 42-2 of both flanges 40-1 and 40-2 are provided with upstream and downstream fastening portions 44-1 and 44-2 as shown in FIGS. A pair of upstream and downstream protrusions 46-1 and 46-2 are provided at positions facing each other in the pipe diameter direction, and communicates between the protrusions 46-1 and 46-2. The upstream and downstream connecting portions 48-1 and 48-2 having gentle curved surfaces are provided at positions opposed to the projecting portions 46-1 and 46-2 in the pipe diameter direction. Both flanges 40-1 and 40-2 are fastened to the fastening portions 44-1 and 44-2 by fasteners 50 such as bolts and nuts, and the upstream side exhaust pipe 36-1 and the downstream side exhaust pipe 36-2. Connect.

この排気装置１４は、両フランジ４０−１・４０−２のなだらかな曲面で形成される各連絡部４８−１・４８−２が燃料タンク８の後面３２に対峙するよう、両フランジ４０−１・４０−２を第３排気管２２の傾斜部３４の周方向に位置決めしている。   The exhaust device 14 includes both flanges 40-1 and 48-2 so that the connecting portions 48-1 and 48-2 formed by gently curved surfaces of the flanges 40-1 and 40-2 face the rear surface 32 of the fuel tank 8. 40-2 is positioned in the circumferential direction of the inclined portion 34 of the third exhaust pipe 22.

前記上流側フランジ４０−１と下流側フランジ４０−２との燃料タンク８に対峙する各連絡部４８−１・４８−２には、上流側排気管３６−１と下流側排気管３６−２との各外周面に連絡する上流側プレート５２−１と下流側プレート５２−２とを夫々取り付けて設け、燃料タンク８の後面３２に対して上流側プレート５２−１と下流側プレート５２−２とでなだらかな曲面を形成している。   The upstream side exhaust pipe 36-1 and the downstream side exhaust pipe 36-2 are respectively connected to the connecting portions 48-1 and 48-2 facing the fuel tank 8 between the upstream side flange 40-1 and the downstream side flange 40-2. An upstream plate 52-1 and a downstream plate 52-2 that are in contact with the outer peripheral surfaces of the fuel tank 8 are respectively attached to the rear surface 32 of the fuel tank 8, and the upstream plate 52-1 and the downstream plate 52-2. A gentle curved surface is formed.

上流側プレート５２−１と下流側プレート５２−２とは、図２・図４に示す如く、幅方向において湾曲する略長四角板形状に形成され、長手方向一端側に上流側・下流側連絡部用取付部５４−１・５４−２を設けるとともに、長手方向他端側に上流側・下流側排気管用取付部５６−１・５６−２を設けている。   As shown in FIGS. 2 and 4, the upstream plate 52-1 and the downstream plate 52-2 are formed in a substantially rectangular plate shape that is curved in the width direction, and the upstream and downstream sides are connected to one end in the longitudinal direction. The attachment portions 54-1 and 54-2 for the parts are provided, and the upstream and downstream exhaust pipe attachment portions 56-1 and 56-2 are provided on the other end in the longitudinal direction.

上流側プレート５２−１は、上流側連絡部用取付部５４−１を燃料タンク８の後面３２に対峙する上流側フランジ４０−１の上流側連絡部４８−１に溶接等により取り付けて設けるとともに、上流側排気管用取付部５６−１を上流側排気管３６−１の外周面に溶接等により取付て設けている。下流側プレート５２−２は、下流側連絡部用取付部５４−２を燃料タンク８の後面３２に対峙する下流側フランジ４０−２の下流側連絡部４８−２に溶接等により取り付けて設けるとともに、下流側排気管用取付部５６−２を下流側排気管３６−２の外周面に溶接等により取付て設けている。   The upstream plate 52-1 is provided by attaching the upstream connecting portion mounting portion 54-1 to the upstream connecting portion 48-1 of the upstream flange 40-1 facing the rear surface 32 of the fuel tank 8 by welding or the like. The upstream exhaust pipe mounting portion 56-1 is attached to the outer peripheral surface of the upstream exhaust pipe 36-1 by welding or the like. The downstream plate 52-2 is provided by attaching the downstream connecting portion mounting portion 54-2 to the downstream connecting portion 48-2 of the downstream flange 40-2 facing the rear surface 32 of the fuel tank 8 by welding or the like. The downstream exhaust pipe attachment portion 56-2 is provided by being attached to the outer peripheral surface of the downstream exhaust pipe 36-2 by welding or the like.

なお、この実施例においては、下流側プレート５２−２の下流側排気管用取付部５６−２を下流側排気管３６−２の外周面に近接する消音器２８に取り付けて設けている。また、下流側プレート５２−２には、図７に示す如く、脆弱部５８を設けている。脆弱部５８は、下流側排気管用取付部５６−２の近傍に位置させて、幅方向に指向する溝形状に形成して設けている。   In this embodiment, the downstream side exhaust pipe attachment portion 56-2 of the downstream side plate 52-2 is attached to the silencer 28 adjacent to the outer peripheral surface of the downstream side exhaust pipe 36-2. The downstream plate 52-2 is provided with a weakened portion 58 as shown in FIG. The fragile portion 58 is provided in the vicinity of the downstream exhaust pipe attachment portion 56-2 and formed in a groove shape oriented in the width direction.

次に、この実施例の作用を説明する。   Next, the operation of this embodiment will be described.

車両２の排気装置１４は、車両２の前側の内燃機関４から後側に向かって、第１排気管１８と第２排気管２０と第３排気管２２とをフランジ接続部２４・２６により順次に接続してなる排気管１６を車両２の略中央部位に配設している。   The exhaust device 14 of the vehicle 2 has a first exhaust pipe 18, a second exhaust pipe 20, and a third exhaust pipe 22 sequentially connected to the rear side from the internal combustion engine 4 on the front side of the vehicle 2 by flange connection portions 24 and 26. An exhaust pipe 16 connected to is disposed at a substantially central portion of the vehicle 2.

燃料タンク８の配設位置を超えて後方に延びる第３排気管２２は、経路途中の燃料タンク８と消音器２８との間に燃料タンク８の後面３２に対峙する傾斜部３４を設けている。第３排気管２２の傾斜部３４は、上流側排気管３６−１と下流側排気管３６−２とに分割して上流側フランジ４０−１と下流側フランジ４０−２とを夫々設け、上流側フランジ４０−１と下流側フランジ４０−２との上流側・下流側外縁部４２−１・４２−２が燃料タンク８に対峙している。   The third exhaust pipe 22 extending rearward beyond the position where the fuel tank 8 is disposed is provided with an inclined portion 34 facing the rear surface 32 of the fuel tank 8 between the fuel tank 8 and the silencer 28 in the middle of the path. . The inclined portion 34 of the third exhaust pipe 22 is divided into an upstream exhaust pipe 36-1 and a downstream exhaust pipe 36-2 and is provided with an upstream flange 40-1 and a downstream flange 40-2, respectively. The upstream and downstream outer edge portions 42-1 and 42-2 between the side flange 40-1 and the downstream flange 40-2 face the fuel tank 8.

この排気装置１４は、両フランジ４０−１・４０−２の各外縁部４２−１・４２−２に上流側・下流側締結部４４−１・４４−２を備える上流側・下流側突出部４６−１・４６−２が複数個設けられるとともに、各突出部４６−１・４６−２の間がなだらかな曲面の上流側・下流側連絡部４８−１・４８−２で連絡されている。   The exhaust device 14 includes upstream and downstream protrusions provided with upstream and downstream fastening portions 44-1 and 44-2 at the outer edge portions 42-1 and 42-2 of both flanges 40-1 and 40-2. A plurality of 46-1 and 46-2 are provided, and the projecting portions 46-1 and 46-2 are connected to each other by gently curved upstream and downstream connecting portions 48-1 and 48-2. .

この排気装置１４は、両フランジ４０−１・４０−２のなだらかな曲面で形成される各連絡部４８−１・４８−２が燃料タンク８の後面３２に対峙するよう、両フランジ４０−１・４０−２を第３排気管２２の傾斜部３４の周方向に位置決めしている。   The exhaust device 14 includes both flanges 40-1 and 48-2 so that the connecting portions 48-1 and 48-2 formed by gently curved surfaces of the flanges 40-1 and 40-2 face the rear surface 32 of the fuel tank 8. 40-2 is positioned in the circumferential direction of the inclined portion 34 of the third exhaust pipe 22.

これにより、この排気装置１４は、車両２の後突時には傾斜のなだらかな曲面の各連絡部４８−１・４８−２が前方の燃料タンク８に衝突することになり、燃料タンク８の局部的な変形が抑制されて損傷を防止することができる。   As a result, in the exhaust device 14, the connecting portions 48-1 and 48-2 having gentle slopes collide with the fuel tank 8 in front when the rear collision of the vehicle 2 occurs. Can be prevented from being damaged.

また、上流側フランジ４０−１と下流側フランジ４０−２との燃料タンク８に対峙する各連絡部４８−１・４８−２には、上流側排気管３６−１と下流側排気管３６−２との各外周面に連絡する上流側プレート５２−１と下流側プレート５２−２とを夫々取り付けて設けている。   In addition, the upstream side exhaust pipe 36-1 and the downstream side exhaust pipe 36- are connected to the connecting portions 48-1 and 48-2 facing the fuel tank 8 between the upstream side flange 40-1 and the downstream side flange 40-2. An upstream plate 52-1 and a downstream plate 52-2 that are in communication with the outer peripheral surfaces of the plate 2 and the downstream plate 52-2 are attached to each other.

これにより、この排気装置１４は、車両２の後突時には上流側プレート５２−１と下流側プレート５２−２とで形成されるなだらかな曲面が燃料タンク８に衝突することで、燃料タンク８の局部的な変形をさらに抑制することができる。   As a result, the exhaust device 14 causes the gentle curved surface formed by the upstream side plate 52-1 and the downstream side plate 52-2 to collide with the fuel tank 8 at the time of the rear collision of the vehicle 2. Local deformation can be further suppressed.

さらに、下流側プレート５２−２には、下流側排気管用取付部５６−２の近傍に位置させて、幅方向に指向する溝形状の脆弱部５８を設けていることにより、車両２の後突時に下流側プレート５２−２に所定値を超える荷重が作用した場合に、下流側プレート５２−２が変形して燃料タンク８の変形をさらに抑制することができる。   Further, the downstream plate 52-2 is provided with a groove-shaped fragile portion 58 oriented in the width direction so as to be positioned in the vicinity of the downstream exhaust pipe mounting portion 56-2, so that the rear collision of the vehicle 2 is performed. Sometimes, when a load exceeding a predetermined value is applied to the downstream plate 52-2, the downstream plate 52-2 is deformed to further suppress deformation of the fuel tank 8.

なお、この発明は、上述実施例に限定されることなく、種々応用改変が可能である。   The present invention is not limited to the above-described embodiments, and various application modifications can be made.

例えば、図９は、第１の変形例を示すものである。図９に示す排気装置１４は、燃料タンク８の配設位置を超えて後方に延びる第３排気管２２の傾斜部３４に設けた上流側フランジ４０−１と下流側フランジ４０−２とに対峙するように、燃料タンク８の後面３２にガイド部６０を設け、このガイド部６０に前下方に向かって下降傾斜するガイド面６２を設けたものである。   For example, FIG. 9 shows a first modification. The exhaust device 14 shown in FIG. 9 is opposed to an upstream flange 40-1 and a downstream flange 40-2 provided in the inclined portion 34 of the third exhaust pipe 22 that extends rearward beyond the position where the fuel tank 8 is disposed. As described above, a guide portion 60 is provided on the rear surface 32 of the fuel tank 8, and a guide surface 62 that is inclined downward toward the front lower side is provided on the guide portion 60.

この排気装置１４は、車両２の後突時に、前方の燃料タンク８に衝突しようとする上流側フランジ４０−１と下流側フランジ４０−２とをガイド部６０のガイド面６２に沿って下方に移動させることができ、燃料タンク８の局部的な変形が抑制されて損傷を防止することができる。   The exhaust device 14 has an upstream flange 40-1 and a downstream flange 40-2 that are about to collide with the front fuel tank 8 at the time of a rear collision of the vehicle 2 downward along the guide surface 62 of the guide portion 60. It can be moved, and local deformation of the fuel tank 8 can be suppressed to prevent damage.

図１０は、第２の変形例を示すものである。図１０に示す排気装置１４は、燃料タンク８の配設位置を超えて後方に延びる第３排気管２２の傾斜部３４に設けた上流側フランジ４０−１と下流側フランジ４０−２とに対峙するように、燃料タンク８の後面３２から後方に離間させて保護壁６４を設け、後面３２との間に緩衝空間６６を設けたものである。   FIG. 10 shows a second modification. 10 is opposed to an upstream flange 40-1 and a downstream flange 40-2 provided in the inclined portion 34 of the third exhaust pipe 22 that extends rearward beyond the position where the fuel tank 8 is disposed. As described above, the protective wall 64 is provided behind the fuel tank 8 from the rear surface 32, and the buffer space 66 is provided between the protective wall 64 and the rear surface 32.

この排気装置１４は、車両２の後突時に、前方の燃料タンク８に衝突しようとする上流側フランジ４０−１と下流側フランジ４０−２とを保護壁６４に当接させ、緩衝空間６６によって直接的な衝突を緩和することを防止でき、燃料タンク８の局部的な変形が抑制されて損傷を防止することができる。   The exhaust device 14 causes the upstream flange 40-1 and the downstream flange 40-2 that are about to collide with the front fuel tank 8 to abut against the protective wall 64 at the time of a rear collision of the vehicle 2. It is possible to prevent the direct collision from being alleviated, and local deformation of the fuel tank 8 is suppressed, thereby preventing damage.

この発明の車両の排気装置は、燃料タンクの後面に対峙する排気管の傾斜部を分割して上流側フランジと下流側フランジとを設け、両フランジの各外縁部のなだらかな曲面の連絡部が燃料タンクに対峙するよう、両フランジを排気管の周方向に位置決めすることにより、車両の後突時に傾斜のなだらかな曲面の連絡部を前方の燃料タンクに衝突させ、燃料タンクの局部的な変形を抑制するものであり、車両に搭載される他部品にも適用することができる。   In the exhaust system for a vehicle according to the present invention, the inclined portion of the exhaust pipe facing the rear surface of the fuel tank is divided to provide an upstream flange and a downstream flange, and gently curved connecting portions at the outer edge portions of both flanges are provided. By positioning both flanges in the circumferential direction of the exhaust pipe so as to face the fuel tank, the curved curved connecting part collides with the front fuel tank at the time of rear-end collision of the vehicle, and local deformation of the fuel tank It can also be applied to other components mounted on a vehicle.

車両の排気装置の実施例を示す燃料タンク及び消音器間の排気管の平面図である。It is a top view of the exhaust pipe between a fuel tank and a silencer which shows the example of the exhaust system of vehicles. 燃料タンク及び及び消音器間の排気管の底面図である。It is a bottom view of the exhaust pipe between a fuel tank and a silencer. 燃料タンク及び及び消音器間の排気管の車両左側からの側面図である。It is a side view from the vehicle left side of the exhaust pipe between a fuel tank and a silencer. 燃料タンク及び及び消音器間の排気管の車両右側からの側面図である。It is a side view from the vehicle right side of the exhaust pipe between a fuel tank and a silencer. 消音器及び下流側排気管の拡大平面図である。It is an enlarged plan view of a silencer and a downstream exhaust pipe. 上流側排気管の拡大平面図である。It is an enlarged plan view of an upstream side exhaust pipe. 下流側プレートを示し、（Ａ）は平面図、（Ｂ）は正面図、（Ｃ）は側面図である。The downstream plate is shown, (A) is a plan view, (B) is a front view, and (C) is a side view. 排気装置を搭載した車両の概略平面図である。It is a schematic plan view of a vehicle equipped with an exhaust device. 第１の変形例を示す燃料タンク及び及び消音器間の排気管の車両左側からの側面図である。It is a side view from the vehicle left side of the exhaust pipe between the fuel tank and the silencer which shows a 1st modification. 第２の変形例を示す燃料タンク及び及び消音器間の排気管の車両左側からの側面図である。It is a side view from the vehicle left side of the exhaust pipe between a fuel tank and a silencer which shows a 2nd modification. 従来例を示す排気装置を搭載した車両の一部省略平面図である。FIG. 10 is a partially omitted plan view of a vehicle equipped with an exhaust device showing a conventional example.

符号の説明Explanation of symbols

２ 車両
４ 内燃機関
６ 変速機
８ 燃料タンク
１４ 排気装置
１６ 排気管
１８ 第１排気管
２０ 第２排気管
２２ 第３排気管
２８ 消音器
３２ 後面
３４ 傾斜部
３６−１ 上流側排気管
３６−２ 下流側排気管
４０−１ 上流側フランジ
４０−２ 下流側フランジ
４２−１ 上流側外縁部
４２−２ 下流側外縁部
４４−１ 上流側締結部
４４−２ 下流側締結部
４６−１ 上流側突出部
４６−２ 下流側突出部
４８−１ 上流側連絡部
４８−２ 下流側連絡部
５２−１ 上流側プレート
５２−２ 下流側プレート
５８ 脆弱部 2 Vehicle 4 Internal combustion engine 6 Transmission 8 Fuel tank 14 Exhaust device 16 Exhaust pipe 18 First exhaust pipe 20 Second exhaust pipe 22 Third exhaust pipe 28 Muffler 32 Rear surface 34 Inclined portion 36-1 Upstream exhaust pipe 36-2 Downstream exhaust pipe 40-1 Upstream flange 40-2 Downstream flange 42-1 Upstream outer edge 42-2 Downstream outer edge 44-1 Upstream fastening section 44-2 Downstream fastening section 46-1 Upstream protrusion Portion 46-2 Downstream Projection 48-1 Upstream Connection Portion 48-2 Downstream Connection Portion 52-1 Upstream Plate 52-2 Downstream Plate 58 Vulnerable Portion

Claims (3)

車両に搭載される燃料タンクと、この燃料タンクの配設位置を越えて前記車両の後方に延びる排気管とを設け、この排気管は経路途中に前記燃料タンクの後面に対峙する傾斜部を含み、この傾斜部に前記排気管を上流側排気管と下流側排気管とに分割する上流側フランジと下流側フランジとを設け、前記両フランジの各外縁部が前記燃料タンクに対峙する車両の排気装置において、前記両フランジの各外縁部には夫々締結部を備える突出部が複数個設けられるとともに、各突出部の間がなだらかな曲面の連絡部で連絡され、この連絡部が前記燃料タンクに対峙するよう前記両フランジを前記排気管の周方向に位置決めしたことを特徴とする車両の排気装置。   A fuel tank mounted on the vehicle and an exhaust pipe extending rearward of the vehicle beyond the position where the fuel tank is disposed are provided, and the exhaust pipe includes an inclined portion facing the rear surface of the fuel tank in the middle of the path. In addition, an upstream flange and a downstream flange that divide the exhaust pipe into an upstream exhaust pipe and a downstream exhaust pipe are provided in the inclined portion, and the exhaust of the vehicle in which the outer edge portions of both flanges face the fuel tank. In the apparatus, a plurality of projecting portions each having a fastening portion are provided at each outer edge portion of the both flanges, and the projecting portions are communicated with each other by a gently curved connecting portion, and this communicating portion is connected to the fuel tank. An exhaust system for a vehicle, wherein the flanges are positioned in the circumferential direction of the exhaust pipe so as to face each other. 前記上流側フランジと下流側フランジとの前記燃料タンクに対峙する各連絡部には、前記上流側排気管と下流側排気管との各外周面に連絡する上流側プレートと下流側プレートとを夫々取り付けたことを特徴とする請求項１に記載の車両の排気装置。   An upstream plate and a downstream plate that communicate with the outer peripheral surfaces of the upstream exhaust pipe and the downstream exhaust pipe are respectively connected to the connecting portions of the upstream flange and the downstream flange facing the fuel tank. The vehicle exhaust device according to claim 1, wherein the vehicle exhaust device is attached. 前記下流側プレートには、脆弱部を設けたことを特徴とする請求項２に記載の車両の排気装置。   The vehicle exhaust device according to claim 2, wherein the downstream plate is provided with a fragile portion.
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JP2004222198A JP4547613B2 (en) 2004-07-29 2004-07-29 Vehicle exhaust system
CNB2005100830499A CN100360331C (en) 2004-07-29 2005-07-13 Vehicle exhaustor
CNU2005201136344U CN2821174Y (en) 2004-07-29 2005-07-13 Vehicle exhaust device
DE200510034638 DE102005034638B4 (en) 2004-07-29 2005-07-20 Exhaust system for vehicles

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CN100360331C (en) 2008-01-09

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