JP2004148981A - Car body rear structure - Google Patents

Car body rear structure Download PDF

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Publication number
JP2004148981A
JP2004148981A JP2002316133A JP2002316133A JP2004148981A JP 2004148981 A JP2004148981 A JP 2004148981A JP 2002316133 A JP2002316133 A JP 2002316133A JP 2002316133 A JP2002316133 A JP 2002316133A JP 2004148981 A JP2004148981 A JP 2004148981A
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Prior art keywords
silencer
vehicle
vehicle body
rear bumper
fuel tank
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JP2002316133A
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JP3920193B2 (en
Inventor
Toshio Iijima
俊男 飯島
Toru Ono
徹 小野
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • 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)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a car body rear structure capable of preventing a silencer from contacting with a fuel tank at a vehicle rear surface collision time. <P>SOLUTION: A rear bumper stay 17 disposed at the back of the silencer 11 is provided with a pressing bracket 20 that has a tilting surface tilting so that the more backward it lies, the more downward it lies, and presses the silencer 11 downwardly on the tilting surface when the rear bumper stay 17 displaces forward. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、燃料タンクの後方に排気管のサイレンサが配置される車両の車体後部構造に関する。
【０００２】
【従来の技術】
従来、燃料タンクの後方に排気管のサイレンサが配置される車両の車体後部構造において、燃料タンクの近傍に排気管のサイレンサが配置される場合は、排気管の形状を工夫することにより、車両後面衝突時に、排気管の変形に伴うサイレンサの移動の方向が、燃料タンクに接触させない方向となるように設定することで、比較的硬いサイレンサが燃料タンクに接触してしまうことを防止している（例えば、特許文献１参照。）。
【０００３】
【特許文献１】
特開平０６−０３３７５７号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の車体後部構造では、燃料タンクから車体の後端部までの距離が短い車両においては、排気管の形状を十分に工夫することができないため、車両後面衝突時にサイレンサが燃料タンクに接触することを防止することが困難であるという問題がある。
そこで、この発明は、燃料タンクから車体の後端部までの距離が短い車両においても、車両後面衝突時にサイレンサが燃料タンクに接触することを防止できる車体後部構造を提供する。
【０００５】
【課題を解決するための手段】
上記課題の解決手段として、請求項１に記載した発明は、燃料タンク（例えば実施の形態における燃料タンク５，６）の後方に排気管（例えば実施の形態における排気管１０）のサイレンサ（例えば実施の形態におけるサイレンサ１１）が配置される車両（例えば実施の形態における燃料電池車両１）の車体後部構造において、前記サイレンサの後方に配置される車体部材（例えば実施の形態におけるリアバンパステイ１７）に、後方に位置するほど下方に位置するように傾斜する傾斜面（例えば実施の形態における傾斜面２１）を有し該車体部材が前方に変位したときに前記サイレンサを前記傾斜面で下方に押圧する押圧部（例えば実施の形態における押圧ブラケット２０）が設けられていることを特徴とする車体後部構造を提供する。
【０００６】
この構成によれば、押圧部の傾斜面により、サイレンサ後方の車体部材が前方に変位するほどサイレンサを下方に押圧できるため、車両後面衝突時には、サイレンサを強制的に下方に押し下げることができる。
【０００７】
請求項２に記載した発明は、前記車体部材が、前記車両のリアバンパ（例えば実施の形態におけるリアバンパ１４）と連結される連結部材（例えば実施の形態におけるリアバンパステイ１７）であることを特徴とする請求項１に記載の車体後部構造を提供する。
【０００８】
この構成によれば、車両後面衝突時には、リアバンパに連結される連結部材から押圧部へ衝撃荷重が直に伝達され、サイレンサを強制的に下方に押し下げることができる。
【０００９】
【発明の実施の形態】
以下、この発明の実施の形態を図面に基づいて説明する。
図１において、１は燃料電池自動車（車両）であって、その車体２の車室部分のフロアパネル３下に搭載された燃料電池４に、車体後部のフロアパネル３下に搭載された２つの燃料タンク５，６から水素ガスが供給されるようになっている。燃料電池４は、供給された水素ガスと、空気等の酸化剤ガスとを電気化学反応させて発電し、その電力が車体前部に搭載された駆動用モータ７に供給されて、燃料電池自動車１が走行可能となっている。
【００１０】
図２、図３に示すように、各燃料タンク５，６は、その長手方向が車幅方向と平行になるように配置され、各々前後方向に隣接配置されている。これら燃料タンク５，６が、枠状に形成され略水平に配置されるサブフレーム８の内側に取り付けられた状態で、車体２の各サイドフレーム９，９に固定されている。ここで、サブフレーム８は、図示しないサスペンション部品が取り付けられるもので、十分な強度を有するものである。
【００１１】
前側の燃料タンク５のさらに前方に配置される燃料電池４からは、そのカソード側の排気ガスを車体後方に導くための排気管１０が、各燃料タンク５，６の下方を通過して後方に向かって延出している。後側の燃料タンク６のさらに後方には、排気管１０の後端部に設けられる筒状のサイレンサ１１が、車体左側部分に、その軸線が車幅方向と略平行となるように配置されている。サイレンサ１１は、排気管１０に対して大型の断面形状を有し、かつ車幅方向両端部に軸線とほぼ直交する側壁１２，１２を有する比較的強固な部品とされ、後側の燃料タンク６と、サブフレーム８の後辺部分を形成するフレーム部材１３を挟んで前後方向で対向配置されている。ここで、サイレンサ１１及び各燃料タンク５，６は、互いに車体後部のフロアパネル３下の空間に搭載される関係上、車幅方向及び高さ方向で重なり、前後方向のみずらした位置に配置されている。
【００１２】
各サイドフレーム９，９の後端部には、リアバンパ１４の骨格を形成するリアバンパビーム１５が車幅方向に延設されている。リアバンパ１４は、その下部１６が、サイレンサ１１及び各燃料タンク５，６の下面と略同一高さとなるように形成されている。そして、サイレンサ１１の上部の後方には、リアバンパ１４の下部１６を支持するリアバンパステイ（車体部材）１７が車幅方向に沿って延設されている。
【００１３】
図４に示すように、リアバンパステイ１７は、例えば鋼管を所望の形状に屈曲成形したもので、その両端部が各々サイドフレーム９，９の下面に固定されている。リアバンパステイ１７の車体右側部分は、右側のサイドフレーム９との固定位置からリアバンパ１４の下部１６近傍まで下降するクランク状に形成され、リアバンパ１４の下部１６右側の支持点に対応する部位に設けられた支持ブラケット１８を介してリアバンパ１４と連結されている。一方、リアバンパステイ１７の車体左側部分は、サイレンサ１１の上部と車幅方向及び高さ方向で重なるように略水平に形成されており、リアパンパステイ１７の車体左側部分と右側部分とが緩やかに接続されている。リアバンパ１４の下部１６左側の支持点に対応する部位に設けられた支持ブラケット１９は、リアバンパステイ１７の車体左側部分とリアバンパ１４の下部１６との高さの差に対応して、リアバンパステイ１７から下方に延出するように形成され、この支持ブラケット１９を介してリアバンパステイ１７の車体左側部分とリアバンパ１４とが連結されている。
【００１４】
そして、リアバンパステイ１７には、サイレンサ１１の車幅方向両端部、つまり各側壁１２，１２と各々車幅方向及び高さ方向で重なる位置に押圧ブラケット（押圧部）２０，２０が設けられている。
図５に示すように、押圧ブラケット２０はリアバンパステイ１７からサイレンサ１１側に突出するように設けられ、リアバンパステイ１７が前方に変位したときにサイレンサ１１に先当たりするようになっている。また、押圧ブラケット２０において、サイレンサ１１と前後方向で対向する部位には、後方に位置するほど下方に位置するように傾斜する傾斜面２１が形成されている。この傾斜面２１により、リアバンパステイ１７が前方に変位し、押圧ブラケット２０がサイレンサ１１に当接した状態で、リアバンパステイ１７に前方への荷重が加わると、押圧ブラケット２０がサイレンサ１１の上部であって車幅方向両端部を下方に向かって押圧するように設定されている。
【００１５】
フレーム部材１３の後面には、前方に位置するほど下方に位置するように傾斜する案内面２２が形成されている。また、サイレンサ１１はその軸線方向断面が略長円状に形成され、その断面形状における長辺方向が、前方に位置するほど下方に位置すると共に、フレーム部材１３の案内面２２と略平行となるようように傾斜している。つまり、サイレンサ１１自体が前方に位置するほど下方に位置するように傾斜して配置されている。ここで、サイレンサ１１、各燃料タンク５，６、リアバンパステイ１７及びサブフレーム９は、車幅方向及び高さ方向で重なり、前後方向のみずらした位置に配置されている。案内面２２の角度及びサイレンサ１１の長手方向の角度は、サイレンサ１１が前方に向かって移動し、案内面２２に当接した状態で、サイレンサ１１に前方への荷重が加わると、サイレンサ１１を前方に移動させながら下方に案内する角度とされている。
【００１６】
次に、作用について説明する。
燃料電池自動車１において、後方から他の車両が追突する等の車両後面衝突時には、車体後部が変形することで衝撃荷重を吸収することとなる。このとき、リアバンパ１４と共にリアバンパステイ１７が前方に移動し、各押圧ブラケット２０，２０の傾斜面２１がサイレンサ１１に当接すると共に、リアバンパステイ１７に衝撃荷重（前方への荷重）が加わると、各押圧ブラケット２０，２０が各々傾斜面２１の傾斜によりサイレンサ１１を下方に向かって強制的に押し下げながら、リアバンパステイ１７と共に前方へ移動することとなる。これにより、車両後面衝突時にサイレンサ１１を押し下げてその前方に配置される各燃料タンク５，６の下方に潜り込ませることが可能となる。
【００１７】
ここで、各押圧ブラケット２０がリアバンパ１４と連結されるリアバンパステイ１７に設けられているため、他の車両等からの衝撃荷重が各押圧ブラケット２０に直に伝達され、サイレンサ１１を確実に押し下げることができる。
また、各押圧ブラケット２０がサイレンサ１１の車幅方向両端部と各々車幅方向及び高さ方向で重なる位置に設けられているため、サイレンサ１１における側壁１２が設けられた比較的堅固な部分を押圧することとなり、サイレンサ１１が変形して傾斜面２１による押圧力が吸収されてしまうことを防止して、サイレンサ１１をより確実に押し下げることができる。
【００１８】
また、車体後部の変形が進行する段階で、サイレンサ１１が各燃料タンク５，６の下方まで下がりきらずに前方に移動した場合でも、サイレンサ１１がその前方に配置されるサブフレーム８のフレーム部材１３の案内面２２に当接すると共に、サイレンサ１１に衝撃荷重（前方への荷重）が加わると、フレーム部材１３がその案内面２２の傾斜によりサイレンサ１１を下方に向かって強制的に案内して、サイレンサ１１を燃料タンク５，６の下方に確実に潜り込ませることが可能となる。このとき、サイレンサ１１自体が案内面２２と略平行となるように傾斜しているため、フレーム部材１３によりサイレンサ１１が下方に向かって円滑に案内されることとなる。また、フレーム部材１３が高強度とされているため、サイレンサ１１が接触しても容易に変形することがなく、サイレンサ１１を下方に向かって確実に案内することができる。
【００１９】
上記実施の形態における車体後部構造によれば、車両後面衝突時、比較的堅固な部品であるサイレンサ１１を強制的に押し下げると共に下方に向かって強制的に案内することで、サイレンサ１１の前方に配置される燃料タンク５，６の下方に潜り込ませるが可能なため、排気管１０の形状に関わらず、かつ燃料タンク５，６から車体２の後端部までの距離が短い車両においても、サイレンサ１１がその前方に配置される燃料タンク５，６に接触することを確実に防止することができる。
【００２０】
なお、この発明は上記実施の形態に限られるものではなく、例えば、押圧ブラケット２０を設けず、リアバンパステイ１７に傾斜面２１に相当する傾斜面を直に形成してもよい。
さらに、サイレンサ１１を下方に押し下げるための傾斜面２１は、平面ではなく凹状又は凸状の曲面であってもよい。
そして、この発明に係る車両後部構造は、燃料電池自動車だけではなく、通常の内燃エンジン車両や天然ガス車両においても適用できることはいうまでもない。
【００２１】
【発明の効果】
以上説明してきたように、請求項１に記載した発明によれば、車両後面衝突時において、サイレンサを強制的に下方に押し下げることができることができるため、燃料タンクから車体の後端部までの距離が短い車両においても、排気管の形状と無関係に、サイレンサが燃料タンクに接触することを確実に防止することができる。
【００２２】
請求項２に記載した発明によれば、車両後面衝突時において、リアバンパに連結される連結部材から押圧部へ衝撃荷重が直に伝達され、サイレンサを強制的に下方に押し下げることができるため、サイレンサが燃料タンクに接触することをより確実に防止することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態における燃料電池車両の側面図である。
【図２】図１における燃料電池車両の車体後部の側面説明図である。
【図３】図２における下面説明図である。
【図４】図３におけるＡ−Ａ線に沿う断面図である。
【図５】図４におけるＢ−Ｂ線に沿う断面図である。
【符号の説明】
１ 燃料電池自動車（車両）
２ 車体
５，６ 燃料タンク
１０ 排気管
１１ サイレンサ
１４ リアバンパ
１７ リアバンパステイ（車体部材）
２０ 押圧ブラケット（押圧部）
２１ 傾斜面[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle body rear structure in which a silencer of an exhaust pipe is disposed behind a fuel tank.
[0002]
[Prior art]
Conventionally, in a vehicle body rear structure in which an exhaust pipe silencer is disposed behind a fuel tank, when an exhaust pipe silencer is disposed near a fuel tank, the shape of the exhaust pipe is devised to improve the rear surface of the vehicle. At the time of collision, the direction of movement of the silencer due to the deformation of the exhaust pipe is set so as not to contact the fuel tank, thereby preventing the relatively hard silencer from contacting the fuel tank ( For example, see Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 06-033775
[Problems to be solved by the invention]
However, in the above-described conventional rear body structure, in a vehicle in which the distance from the fuel tank to the rear end of the vehicle body is short, the shape of the exhaust pipe cannot be sufficiently devised. There is a problem that it is difficult to prevent contact.
Accordingly, the present invention provides a vehicle body rear structure that can prevent the silencer from contacting the fuel tank at the time of a vehicle rear collision even in a vehicle in which the distance from the fuel tank to the rear end of the vehicle body is short.
[0005]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, the invention described in claim 1 provides a silencer (for example, an exhaust pipe (for example, an exhaust pipe 10 in the embodiment)) behind a fuel tank (for example, the fuel tanks 5, 6 in the embodiment). In a vehicle body rear structure of a vehicle (for example, the fuel cell vehicle 1 in the embodiment) in which the silencer 11 in the embodiment is disposed, a vehicle body member (for example, the rear bump stay 17 in the embodiment) disposed behind the silencer includes: A pressing surface which has a slope (for example, the slope 21 in the embodiment) inclined so as to be positioned lower as it is located rearward, and which presses the silencer downward with the slope when the vehicle body member is displaced forward; The vehicle body rear structure is provided with a portion (for example, the pressing bracket 20 in the embodiment).
[0006]
According to this configuration, the silencer can be pressed downward by the inclined surface of the pressing portion as the vehicle body member behind the silencer is displaced forward, so that the silencer can be forcibly pushed down at the time of a vehicle rear collision.
[0007]
The invention described in claim 2 is characterized in that the vehicle body member is a connecting member (for example, the rear bumper stay 17 in the embodiment) connected to a rear bumper (for example, the rear bumper 14 in the embodiment) of the vehicle. A vehicle body rear structure according to claim 1 is provided.
[0008]
According to this configuration, at the time of a vehicle rear collision, the impact load is directly transmitted from the connecting member connected to the rear bumper to the pressing portion, and the silencer can be forcibly pushed down.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a fuel cell vehicle (vehicle), which includes a fuel cell 4 mounted under a floor panel 3 in a cabin portion of a vehicle body 2 and two fuel cells mounted under a floor panel 3 at a rear portion of the vehicle body. Hydrogen gas is supplied from the fuel tanks 5 and 6. The fuel cell 4 generates electricity by performing an electrochemical reaction between the supplied hydrogen gas and an oxidizing gas such as air, and the electric power is supplied to a driving motor 7 mounted on a front portion of a vehicle body, and the fuel cell vehicle 1 can run.
[0010]
As shown in FIGS. 2 and 3, each of the fuel tanks 5, 6 is arranged so that its longitudinal direction is parallel to the vehicle width direction, and is arranged adjacent to each other in the front-rear direction. The fuel tanks 5 and 6 are fixed to the side frames 9 and 9 of the vehicle body 2 in a state where the fuel tanks 5 and 6 are mounted inside a sub-frame 8 formed in a frame shape and arranged substantially horizontally. Here, the subframe 8 has a sufficient strength to which a suspension component (not shown) is attached.
[0011]
From the fuel cell 4 arranged further forward of the front fuel tank 5, an exhaust pipe 10 for guiding exhaust gas on the cathode side to the rear of the vehicle body passes below the fuel tanks 5 and 6 to the rear. It is extending towards. Behind the rear fuel tank 6, a cylindrical silencer 11 provided at the rear end of the exhaust pipe 10 is disposed on the left side of the vehicle body so that its axis is substantially parallel to the vehicle width direction. I have. The silencer 11 is a relatively strong component having a large cross-sectional shape with respect to the exhaust pipe 10 and side walls 12, 12 at both ends in the vehicle width direction that are substantially perpendicular to the axis. And the frame member 13 forming the rear side portion of the sub-frame 8, and are disposed to face each other in the front-rear direction. Here, since the silencer 11 and the fuel tanks 5 and 6 are mounted on each other in a space below the floor panel 3 at the rear of the vehicle body, the silencers 11 and the fuel tanks 5 and 6 overlap in the vehicle width direction and the height direction, and are arranged at positions shifted only in the front-back direction. ing.
[0012]
At the rear end of each of the side frames 9, 9, a rear bumper beam 15 forming a skeleton of the rear bumper 14 extends in the vehicle width direction. The rear bumper 14 is formed such that the lower portion 16 thereof is substantially flush with the lower surfaces of the silencer 11 and the fuel tanks 5 and 6. Behind the upper part of the silencer 11, a rear bumper stay (body member) 17 that supports the lower part 16 of the rear bumper 14 extends in the vehicle width direction.
[0013]
As shown in FIG. 4, the rear bump pasty 17 is formed by bending a steel pipe into a desired shape, for example, and both ends thereof are fixed to the lower surfaces of the side frames 9, 9, respectively. The right side portion of the rear bumper stay 17 is formed in a crank shape that descends from a fixed position with the right side frame 9 to a position near the lower portion 16 of the rear bumper 14 and is provided at a position corresponding to a support point on the right side of the lower portion 16 of the rear bumper 14. Connected to the rear bumper 14 via the support bracket 18. On the other hand, the left body portion of the rear bump pasty 17 is formed substantially horizontally so as to overlap the upper portion of the silencer 11 in the vehicle width direction and the height direction, and the left body portion and the right portion of the rear pan pasty 17 are gently formed. It is connected. A support bracket 19 provided at a position corresponding to a support point on the left side of the lower portion 16 of the rear bumper 14 is moved from the rear bumper portion 17 in accordance with the height difference between the left side portion of the rear bumper 17 and the lower portion 16 of the rear bumper 14. It is formed so as to extend downward, and the left side of the rear bumper stay 17 is connected to the rear bumper 14 via the support bracket 19.
[0014]
The rear bump pasty 17 is provided with pressing brackets (pressing portions) 20, 20 at both ends in the vehicle width direction of the silencer 11, that is, at positions overlapping the side walls 12, 12 in the vehicle width direction and the height direction, respectively. .
As shown in FIG. 5, the pressing bracket 20 is provided so as to protrude from the rear bumper stay 17 toward the silencer 11, and comes into contact with the silencer 11 when the rear bumper stay 17 is displaced forward. Further, in the pressing bracket 20, an inclined surface 21 is formed at a portion facing the silencer 11 in the front-rear direction so as to be located lower as it is located rearward. When the rear bumper stay 17 is displaced forward by the inclined surface 21 and a forward load is applied to the rear bumper stay 17 in a state where the pressing bracket 20 is in contact with the silencer 11, the pressing bracket 20 is located above the silencer 11. It is set so that both ends in the vehicle width direction are pressed downward.
[0015]
The rear surface of the frame member 13 is formed with a guide surface 22 that is inclined so as to be located lower as it is located forward. Further, the silencer 11 is formed such that its axial cross section is formed in a substantially elliptical shape, and the longer side direction in the cross sectional shape is located lower as it is located forward, and is substantially parallel to the guide surface 22 of the frame member 13. So inclined. In other words, the silencer 11 is arranged so as to be inclined downward so that the silencer 11 itself is located forward. Here, the silencer 11, the fuel tanks 5, 6, the rear bumper stay 17, and the sub-frame 9 overlap in the vehicle width direction and the height direction, and are arranged at positions shifted only in the front-rear direction. The angle of the guide surface 22 and the angle in the longitudinal direction of the silencer 11 are such that, when the silencer 11 moves forward and a load is applied to the silencer 11 in the forward direction while the silencer 11 is in contact with the guide surface 22, the silencer 11 moves forward. The angle is such that it is guided downward while moving to
[0016]
Next, the operation will be described.
In the fuel cell vehicle 1, at the time of a vehicle rear collision such as a collision of another vehicle from behind, the rear portion of the vehicle body is deformed to absorb the impact load. At this time, when the rear bumper stay 17 moves forward together with the rear bumper 14, the inclined surfaces 21 of the pressing brackets 20, 20 come into contact with the silencer 11, and when an impact load (forward load) is applied to the rear bumper stay 17, The pressing brackets 20 and 20 move forward together with the rear bump pasty 17 while forcibly pushing down the silencer 11 downward due to the inclination of the inclined surface 21. This makes it possible to push down the silencer 11 at the time of a vehicle rear collision so that the silencer 11 goes under each of the fuel tanks 5 and 6 disposed in front of the silencer 11.
[0017]
Here, since each pressing bracket 20 is provided on the rear bumper stay 17 connected to the rear bumper 14, an impact load from another vehicle or the like is directly transmitted to each pressing bracket 20, and the silencer 11 is reliably pushed down. Can be.
Further, since each pressing bracket 20 is provided at a position overlapping both ends in the vehicle width direction of the silencer 11 in the vehicle width direction and the height direction, a relatively rigid portion of the silencer 11 where the side wall 12 is provided is pressed. As a result, it is possible to prevent the silencer 11 from being deformed and absorbing the pressing force by the inclined surface 21, so that the silencer 11 can be pushed down more reliably.
[0018]
Further, even when the silencer 11 moves forward without lowering below the fuel tanks 5 and 6 at the stage where the deformation of the rear part of the vehicle body progresses, the frame member 13 of the sub-frame 8 in which the silencer 11 is disposed in front of the silencer 11 is disposed. When the impact load (forward load) is applied to the silencer 11 while the frame member 13 is tilted, the frame member 13 forcibly guides the silencer 11 downward, and the silencer 11 11 can be surely sunk below the fuel tanks 5 and 6. At this time, since the silencer 11 is inclined so as to be substantially parallel to the guide surface 22, the silencer 11 is smoothly guided downward by the frame member 13. In addition, since the frame member 13 has high strength, the silencer 11 is not easily deformed even if it comes into contact, and the silencer 11 can be reliably guided downward.
[0019]
According to the vehicle body rear structure in the above-described embodiment, at the time of a vehicle rear collision, the silencer 11, which is a relatively solid component, is forcibly pushed down and forcibly guided downward, so that the silencer 11 is disposed in front of the silencer 11. Can be sunk under the fuel tanks 5, 6, and therefore, regardless of the shape of the exhaust pipe 10, even in a vehicle where the distance from the fuel tanks 5, 6 to the rear end of the vehicle body 2 is short, the silencer 11 Can be reliably prevented from contacting the fuel tanks 5 and 6 disposed in front of the fuel tank.
[0020]
The present invention is not limited to the above embodiment. For example, an inclined surface corresponding to the inclined surface 21 may be directly formed on the rear bump pasty 17 without providing the pressing bracket 20.
Furthermore, the inclined surface 21 for pushing down the silencer 11 downward may be a concave or convex curved surface instead of a flat surface.
And it goes without saying that the vehicle rear structure according to the present invention can be applied not only to fuel cell vehicles, but also to ordinary internal combustion engine vehicles and natural gas vehicles.
[0021]
【The invention's effect】
As described above, according to the first aspect of the invention, the silencer can be forcibly pushed down at the time of a vehicle rear collision, so that the distance from the fuel tank to the rear end of the vehicle body can be reduced. It is possible to reliably prevent the silencer from contacting the fuel tank irrespective of the shape of the exhaust pipe even in a vehicle having a short length.
[0022]
According to the second aspect of the present invention, at the time of a vehicle rear collision, the impact load is directly transmitted from the connecting member connected to the rear bumper to the pressing portion, and the silencer can be forcibly pushed down. Can be more reliably prevented from contacting the fuel tank.
[Brief description of the drawings]
FIG. 1 is a side view of a fuel cell vehicle according to an embodiment of the present invention.
FIG. 2 is an explanatory side view of a rear portion of a vehicle body of the fuel cell vehicle in FIG. 1;
FIG. 3 is an explanatory bottom view of FIG. 2;
FIG. 4 is a sectional view taken along line AA in FIG.
FIG. 5 is a sectional view taken along line BB in FIG. 4;
[Explanation of symbols]
1 fuel cell vehicle (vehicle)
2 Body 5, 6 Fuel tank 10 Exhaust pipe 11 Silencer 14 Rear bumper 17 Rear bump pasty (body member)
20 Press bracket (press section)
21 Slope

Claims (2)

燃料タンクの後方に排気管のサイレンサが配置される車両の車体後部構造において、前記サイレンサの後方に配置される車体部材に、後方に位置するほど下方に位置するように傾斜する傾斜面を有し該車体部材が前方に変位したときに前記サイレンサを前記傾斜面で下方に押圧する押圧部が設けられていることを特徴とする車体後部構造。In a vehicle body rear portion structure in which a silencer of an exhaust pipe is disposed behind a fuel tank, a vehicle body member disposed behind the silencer has an inclined surface that is inclined so as to be located lower as it is located rearward. A rear portion of the vehicle body, comprising a pressing portion that presses the silencer downward on the inclined surface when the vehicle body member is displaced forward. 前記車体部材が、前記車両のリアバンパと連結される連結部材であることを特徴とする請求項１に記載の車体後部構造。The vehicle body rear structure according to claim 1, wherein the vehicle body member is a connecting member connected to a rear bumper of the vehicle.
JP2002316133A 2002-10-30 2002-10-30 Car body rear structure Expired - Fee Related JP3920193B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002316133A JP3920193B2 (en) 2002-10-30 2002-10-30 Car body rear structure

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Country Status (1)

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DE102012210929A1 (en) 2011-06-27 2012-12-27 Suzuki Motor Corporation Vehicle floor assembly
US8651564B2 (en) 2010-04-23 2014-02-18 Honda Motor Co., Ltd. Polygonal cross-sectional frame, and rear vehicle body structure
CN105569792A (en) * 2014-10-30 2016-05-11 本田技研工业株式会社 Internal combustion engine exhaust system supporting structure
FR3056950A1 (en) * 2016-10-03 2018-04-06 Peugeot Citroen Automobiles Sa PASSIVE SECURITY METHOD IN CASE OF REAR COLLISION OF A MOTOR VEHICLE AND REAR EXHAUST MUFFLER IMPLEMENTING SAID METHOD
EP3831634A1 (en) * 2019-12-04 2021-06-09 RENAULT s.a.s. Means for guiding an element in relation to a rear end of a vehicle in the event of a crash

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JP5465590B2 (en) * 2010-04-23 2014-04-09 本田技研工業株式会社 Car body rear structure

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8651564B2 (en) 2010-04-23 2014-02-18 Honda Motor Co., Ltd. Polygonal cross-sectional frame, and rear vehicle body structure
DE102012210929A1 (en) 2011-06-27 2012-12-27 Suzuki Motor Corporation Vehicle floor assembly
CN102849123A (en) * 2011-06-27 2013-01-02 铃木株式会社 Vehicle bottom structure
JP2013006573A (en) * 2011-06-27 2013-01-10 Suzuki Motor Corp Vehicle bottom part structure
US8556335B2 (en) 2011-06-27 2013-10-15 Suzuki Motor Corporation Vehicle bottom structure
CN102849123B (en) * 2011-06-27 2014-10-15 铃木株式会社 Vehicle bottom structure
DE102012210929B4 (en) * 2011-06-27 2015-01-22 Suzuki Motor Corporation Vehicle floor assembly
CN105569792A (en) * 2014-10-30 2016-05-11 本田技研工业株式会社 Internal combustion engine exhaust system supporting structure
FR3056950A1 (en) * 2016-10-03 2018-04-06 Peugeot Citroen Automobiles Sa PASSIVE SECURITY METHOD IN CASE OF REAR COLLISION OF A MOTOR VEHICLE AND REAR EXHAUST MUFFLER IMPLEMENTING SAID METHOD
EP3831634A1 (en) * 2019-12-04 2021-06-09 RENAULT s.a.s. Means for guiding an element in relation to a rear end of a vehicle in the event of a crash
FR3104121A1 (en) * 2019-12-04 2021-06-11 Renault S.A.S Means of guiding an element relative to a rear axle of the vehicle in the event of an impact.

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