JPS6146173Y2 - - Google Patents
Info
- Publication number
- JPS6146173Y2 JPS6146173Y2 JP12525380U JP12525380U JPS6146173Y2 JP S6146173 Y2 JPS6146173 Y2 JP S6146173Y2 JP 12525380 U JP12525380 U JP 12525380U JP 12525380 U JP12525380 U JP 12525380U JP S6146173 Y2 JPS6146173 Y2 JP S6146173Y2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- exhaust pipe
- bent portion
- bent
- vibrations
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005452 bending Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】 本案は自動車用エンジンの排気管に関する。[Detailed description of the invention] This invention relates to an exhaust pipe for an automobile engine.
エンジンの回転軸が車巾方向に配置されたいわ
ゆるエンジン横置式のフロントエンジン・フロン
トドライブ方式の自動車においては、自動車の前
後方向にわたるエンジン振動が後方へ伸びる排気
管にも波及する。この排気管への振動影響の大き
いエンジン振動としては、主としてエンジンの高
速回転に伴う振動と、エンジン負荷が急変する際
のトルク反力による振動が挙げられ、特に後者は
その振巾も大きく排気管への影響も大きい。しか
も走行中には車体振動も伴ない、これらの振動が
排気管に波及することは避けられない。また通
常、排気管は車体に屈曲して配置され、その曲げ
部は振動による応力が集中することから、強度が
不足し勝ちである。 In so-called horizontally mounted front-engine, front-drive automobiles in which the rotating shaft of the engine is arranged in the width direction of the vehicle, engine vibrations in the longitudinal direction of the automobile also spread to the exhaust pipe extending rearward. Engine vibrations that have a large vibration effect on the exhaust pipe include vibrations associated with high-speed engine rotation and vibrations due to torque reaction force when the engine load suddenly changes. It also has a large impact on Moreover, the vehicle body vibrates while driving, and it is inevitable that these vibrations will spread to the exhaust pipe. Furthermore, the exhaust pipe is usually arranged in a bent manner on the vehicle body, and the bent portion tends to lack strength because stress due to vibration is concentrated therein.
本案は極めて簡単な構成により排気管曲げ部の
強度の向上を図ることを目的とする。 The purpose of this proposal is to improve the strength of the bent portion of the exhaust pipe with an extremely simple configuration.
図示例に基づいて具体的に説明すると、1はい
わゆる横置式のエンジン、2はそのエンジン1と
一体のギヤボツクスで、エンジン1からの動力は
ギヤボツクス2内の差動装置の出力軸3を介して
前車輪4に伝達される。エンジン1及びギヤボツ
クス2は図に省略した弾性体を介して車体に支持
されている。5は排気管で、エンジン1の前側か
らエンジンの下方に屈曲させて後方に導き、途中
サブマフラ6を介して後方のマフラ7に接続され
ている。マフラ6,7は弾性体を介して車体に支
持されているが図には省略した。 To give a concrete explanation based on the illustrated example, 1 is a so-called horizontally mounted engine, 2 is a gearbox integrated with the engine 1, and power from the engine 1 is transmitted through the output shaft 3 of the differential device in the gearbox 2. The signal is transmitted to the front wheels 4. The engine 1 and gearbox 2 are supported by the vehicle body via elastic bodies not shown in the figure. Reference numeral 5 denotes an exhaust pipe, which is bent from the front side of the engine 1 to below the engine and led to the rear, and is connected to a rear muffler 7 via a sub-muffler 6 on the way. The mufflers 6 and 7 are supported by the vehicle body via elastic bodies, but are not shown in the figure.
前述のエンジン振動、特にエンジン負荷が急変
する際のトルク反力による振動はエンジンの出力
軸と差動装置の出力軸間のある位置Oを中心と
し、パワーユニツト全体が振動する。この振動は
主として前後方向の振動で、これが排気管5に伝
わり、その屈曲部5a〜5cに応力が集中する。
特にエンジンの前側から下方に至る屈曲部5aは
上下方向の車体振動の影響も受けやすい。 The aforementioned engine vibrations, particularly vibrations caused by torque reaction force when the engine load suddenly changes, cause the entire power unit to vibrate around a certain position O between the output shaft of the engine and the output shaft of the differential gear. This vibration is mainly a vibration in the longitudinal direction, which is transmitted to the exhaust pipe 5, and stress is concentrated on the bent portions 5a to 5c.
In particular, the bent portion 5a extending from the front side of the engine downward is susceptible to the effects of vehicle body vibration in the vertical direction.
そこで、本案は第3図のように排気管5の曲げ
部5aを、その曲げ部の内外方向が長径となる横
断面略長円形に形成したものである(第3図b,
d)。 Therefore, in the present invention, as shown in Fig. 3, the bent portion 5a of the exhaust pipe 5 is formed into a substantially elliptical cross section with the long axis extending in the inner and outer directions of the bent portion (Fig. 3b,
d).
図には省略したが他の曲げ部、例えば、エンジ
ン1とサブマフラ6との間の曲げ部5b、サブマ
フラ6とマフラ7との間の曲げ部5cについても
上記と同様に横断面略長円形に形成してもよい。 Although not shown in the figure, other bent parts, such as the bent part 5b between the engine 1 and the sub-muffler 6, and the bent part 5c between the sub-muffler 6 and the muffler 7, have a substantially oval cross section in the same manner as above. may be formed.
加工方法としては、例えば曲げようとする部分
を予め横断面略長円形に扁平加工し、それを第4
図のパンチ8・ダイス9等の曲げ型により曲げ加
工する。あるいは、扁平率が少なくてよい場合は
直接それに合つた曲げ型で曲げ加工と同時に扁平
に加工することもできる。 As a processing method, for example, the part to be bent is flattened in advance to a substantially oval cross section, and then
Bending is performed using a bending die such as the punch 8 and die 9 shown in the figure. Alternatively, if the flattening ratio is small, it is also possible to directly process the flattening at the same time as the bending process using a suitable bending die.
本案は上記のように排気管5の曲げ部を、その
曲げ部の内外方向が長径となる横断面略長円形に
形成したから、振動方向に対して直角方向の断面
係数が増し、排気管曲げ部の強度を向上させるこ
とができる。 In this case, as described above, the bent part of the exhaust pipe 5 is formed into a substantially elliptical cross section with the long axis in the inner and outer directions of the bent part, so the section modulus in the direction perpendicular to the vibration direction increases, and the exhaust pipe bends. The strength of the part can be improved.
また最近は省エネルギーの観点より出来るだけ
車両の軽量化を図る傾向にあり、排気管の板厚も
極力薄くすることが望まれている。従来は曲げ部
の強度が不足することから、あまり薄くすること
ができなかつたが、本案は可成り薄くしても排気
管曲げ部の必要強度を確保できる利点がある。 Furthermore, recently there has been a trend to reduce the weight of vehicles as much as possible from the viewpoint of energy conservation, and it is desired to reduce the thickness of the exhaust pipe as much as possible. Conventionally, it was not possible to make the exhaust pipe very thin because the strength of the bent portion was insufficient, but the present invention has the advantage that the required strength of the bent portion of the exhaust pipe can be ensured even if the exhaust pipe is made considerably thin.
第1図は本案排気管をエンジン横置式自動車に
装置した例の平面図、第2図はその側面図、第3
図aはその一部の拡大図、同図b〜eは同図aの
b−b,c−c,d−d,e−e断面図、第4図
は曲げ型の正面図。
1はエンジン、2はギヤボツクス、3は出力
軸、4は前車輪、5は排気管、5a〜5cは曲げ
部。
Figure 1 is a plan view of an example in which the exhaust pipe of the present invention is installed in a vehicle with a horizontally mounted engine, Figure 2 is a side view thereof, and Figure 3 is a side view of the exhaust pipe.
Figure a is an enlarged view of a part thereof, figures b to e are sectional views taken along lines bb, cc, dd, and ee in figure a, and Figure 4 is a front view of the bending die. 1 is an engine, 2 is a gearbox, 3 is an output shaft, 4 is a front wheel, 5 is an exhaust pipe, and 5a to 5c are bent parts.
Claims (1)
ドライブ方式の自動車において、 エンジンの前側から下部に至る排気管の曲げ部
を、その曲げ部の内外方向が長径となる横断面略
長円形に形成した自動車用エンジンの排気管。[Scope of Claim for Utility Model Registration] In a front-engine, front-drive vehicle with a horizontally mounted engine, the bent portion of the exhaust pipe from the front side of the engine to the bottom of the engine has an approximate cross-sectional length whose major axis is in the inward and outward direction of the bent portion. A circular exhaust pipe for an automobile engine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12525380U JPS6146173Y2 (en) | 1980-09-03 | 1980-09-03 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12525380U JPS6146173Y2 (en) | 1980-09-03 | 1980-09-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5749516U JPS5749516U (en) | 1982-03-19 |
JPS6146173Y2 true JPS6146173Y2 (en) | 1986-12-25 |
Family
ID=29485736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12525380U Expired JPS6146173Y2 (en) | 1980-09-03 | 1980-09-03 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6146173Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0324822Y2 (en) * | 1985-05-16 | 1991-05-30 | ||
JP5222571B2 (en) * | 2008-01-25 | 2013-06-26 | 株式会社ユタカ技研 | Manufacturing method of collecting pipe |
-
1980
- 1980-09-03 JP JP12525380U patent/JPS6146173Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5749516U (en) | 1982-03-19 |
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