JP2005120847A - Support device of engine exhaust system in vehicle - Google Patents

Support device of engine exhaust system in vehicle Download PDF

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JP2005120847A
JP2005120847A JP2003353806A JP2003353806A JP2005120847A JP 2005120847 A JP2005120847 A JP 2005120847A JP 2003353806 A JP2003353806 A JP 2003353806A JP 2003353806 A JP2003353806 A JP 2003353806A JP 2005120847 A JP2005120847 A JP 2005120847A
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exhaust system
vehicle body
vehicle
elastic body
engine exhaust
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JP4206323B2 (en
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Yasushi Toshimitsu
康 利光
Masanobu Shibayama
正信 柴山
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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  • Exhaust Silencers (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To reduce vertical vibration transmitted from an engine exhaust system to a vehicle body side. <P>SOLUTION: A support member 6 is fixed to a muffler M constituting part of the engine exhaust system Ex, and a support frame 5 is fixed to the vehicle body B. An elastic body 12 having arm parts 12b, 12c extended obliquely upward from the front of the vehicle body B to the rear is fixed in the inside of the support frame 5. A support hole 15 piercing in the vehicle width direction is provided in the central part of the elastic body 12, and the support member 6 is inserted and supported in the support hole 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、車両用エンジンの排気系を車体に支持させるための支持装置に関し、特に、その排気系の下流側部分を、ゴム材などからなる弾性体を介して弾性支持するようにした車両におけるエンジン排気系の支持装置に関するものである。   The present invention relates to a support device for supporting an exhaust system of a vehicle engine on a vehicle body, and particularly in a vehicle in which a downstream portion of the exhaust system is elastically supported via an elastic body made of a rubber material or the like. The present invention relates to a support device for an engine exhaust system.

車両用エンジンの排気ポートには、排気管や消音器などを備えた排気系が接続される。通常、その排気系は長いものとなるので、その下流側部分は、少なくとも１か所において、別途、車体に支持させるようにする。その場合、排気系の下流側部分に設けられる消音器は比較的重いので、その排気系は一つの振動系を構成し、車体が上下方向に振動するとき、排気系も車体に対して上下方向に振動する。そこで、その排気系の支持にはゴム材などからなる弾性体が用いられる。   An exhaust system including an exhaust pipe and a silencer is connected to an exhaust port of the vehicle engine. Since the exhaust system is usually long, the downstream portion is separately supported by the vehicle body at least at one location. In that case, the silencer provided in the downstream part of the exhaust system is relatively heavy, so that the exhaust system constitutes one vibration system, and when the vehicle body vibrates in the vertical direction, the exhaust system also moves vertically with respect to the vehicle body. Vibrate. Therefore, an elastic body made of a rubber material or the like is used for supporting the exhaust system.

そのように、車両用エンジンの排気系を、弾性体を介して車体に弾性支持させる場合、従来は、車体と排気系との間の上下方向の振動がより効果的に吸収されるようにするために、その弾性体として、車体左右方向の両側に上下方向に変形しやすい部分をそれぞれ有する左右対称形状のものを用いるようにしていた（たとえば、特許文献１参照）。
特開２００２−１３８８２６号公報 As described above, when the exhaust system of the vehicle engine is elastically supported by the vehicle body via the elastic body, conventionally, vibration in the vertical direction between the vehicle body and the exhaust system is more effectively absorbed. Therefore, as the elastic body, one having a left-right symmetric shape having portions that are easily deformed in the vertical direction on both sides in the left-right direction of the vehicle body is used (for example, see Patent Document 1).
JP 2002-138826 A

ところで、最近の乗用車にはフラットな乗り心地のものが増えてきている。そのようにフラットな乗り心地の車両の場合には、良好な路面の走行中、道路の継ぎ目のようなわずかな凹凸を通過することによって車体が上下方向に振動しても、その振動はサスペンションのダンパによってすぐに止まる。しかしながら、エンジン排気系が従来のような弾性体を介して車体に支持されていると、車体の上下方向の振動がそのまま排気系に伝達されるので、エンジン排気系が上下方向に振動することになる。しかも、その振動はすぐには止まらない。そして、そのように排気系が振動を続けると、その振動が逆に車体に伝わり、車体を上下方向に揺することがある。特に排気系が上下方向に共振するときには、車体を上下方向に揺する力が大きくなる。そのために、弾性体を介してエンジン排気系を車体に支持させることが、かえって乗り心地を低下させる要因となる。   By the way, recent passenger cars are increasingly equipped with a flat ride. In the case of a vehicle with such a flat ride, even if the vehicle body vibrates in the vertical direction by passing through slight irregularities such as road joints while driving on a good road surface, the vibration is not Stops immediately with a damper. However, if the engine exhaust system is supported by the vehicle body via a conventional elastic body, the vertical vibration of the vehicle body is transmitted to the exhaust system as it is, so that the engine exhaust system vibrates in the vertical direction. Become. Moreover, the vibration does not stop immediately. If the exhaust system continues to vibrate in this way, the vibration is transmitted to the vehicle body in the opposite direction, and the vehicle body may be shaken in the vertical direction. In particular, when the exhaust system resonates in the vertical direction, the force that shakes the vehicle body in the vertical direction increases. For this reason, supporting the engine exhaust system on the vehicle body via the elastic body causes a decrease in riding comfort.

このように、従来のような車両におけるエンジン排気系の支持装置では、排気系の振動による乗り心地への影響が無視できなくなってきている。   As described above, in a conventional engine exhaust system support device in a vehicle, the influence on the riding comfort due to the vibration of the exhaust system cannot be ignored.

本発明は、かかる事情に鑑みてなされたもので、弾性体を介して車両用エンジンの排気系を支持させるようにしながら、その排気系の振動によって乗り心地を低下させることの少ない、車両におけるエンジン排気系の支持装置を提供することを目的とするものである。   The present invention has been made in view of such circumstances, and is an engine in a vehicle in which the exhaust system of the vehicle engine is supported via an elastic body and the ride comfort is less likely to be reduced by vibration of the exhaust system. An object of the present invention is to provide an exhaust system support device.

上記目的を達成するために、請求項１の発明は、車両用エンジンの排気系を、弾性体を介して車体に弾性支持するようにした車両におけるエンジン排気系の支持装置において、前記弾性体が、車体の上下方向の振動を、前後方向の振動成分を含む振動に変換して前記排気系に伝達する形状に形成されていることを特徴とする。   In order to achieve the above object, the invention of claim 1 is directed to an engine exhaust system support apparatus for a vehicle in which an exhaust system of a vehicle engine is elastically supported by a vehicle body via an elastic body. The vehicle body is formed in a shape that converts vibrations in the vertical direction of the vehicle body into vibrations including vibration components in the front-rear direction and transmits them to the exhaust system.

また、請求項２の発明は、上記請求項１の発明において、前記支持装置が、前記車体および排気系のいずれか一方に固定される支持枠と、その他方に固定される支持部材とを備えており、前記弾性体が、車体の前方側から後方側に向かって斜め上下方向に延び、前記支持枠と支持部材とを連結する腕部を有していることを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, the support device includes a support frame fixed to one of the vehicle body and the exhaust system, and a support member fixed to the other side. The elastic body has an arm portion extending obliquely up and down from the front side to the rear side of the vehicle body, and connecting the support frame and the support member.

上記請求項１の発明によれば、弾性体により、車体の上下方向の振動が前後方向の振動成分を含む振動に変換されてエンジン排気系に伝達されるようになるので、排気系に伝達される上下方向の振動成分が小さくなり、その分だけ排気系の上下方向の共振ピーク値を下げることができる。そして、それによって排気系から弾性体を介して車体側に伝達される振動レベルも小さくなるので、車体を上下方向に揺する力を小さくすることができる。したがって、乗り心地の低下を防止することができる。   According to the first aspect of the invention, the elastic body converts the vertical vibration of the vehicle body into the vibration including the vibration component in the front-rear direction and is transmitted to the engine exhaust system. Therefore, the vertical vibration component of the exhaust system can be lowered accordingly. As a result, the vibration level transmitted from the exhaust system to the vehicle body via the elastic body is also reduced, so that the force for shaking the vehicle body in the vertical direction can be reduced. Therefore, it is possible to prevent a decrease in ride comfort.

また、上記請求項２の発明によれば、弾性体が車体の前方側から後方側に向かって斜め上下方向に延びる腕部を有しており、その腕部によって車体側と排気系側とが連結されるので、車体の上下方向の振動時、排気系は弾性体の腕部にほぼ直交する方向、すなわち車体前後方向を含む斜め方向に振動することになる。したがって、上記請求項１に係る発明と同様の効果を得ることができる。   According to the second aspect of the invention, the elastic body has the arm portion that extends obliquely upward and downward from the front side of the vehicle body toward the rear side, and the vehicle body side and the exhaust system side are separated by the arm portion. Since they are connected, when the vehicle body vibrates in the vertical direction, the exhaust system vibrates in a direction substantially perpendicular to the arm portion of the elastic body, that is, in an oblique direction including the vehicle body longitudinal direction. Therefore, the same effect as that of the invention according to claim 1 can be obtained.

以下、本発明の第１実施例を、添付図面に基づいて説明する。   Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

図中、図１〜図５は本発明による車両におけるエンジン排気系の支持装置の第１実施例を示すもので、図１はそのエンジン排気系支持装置を示す斜視図、図２は図１の矢印２方向から見た側面図、図３は図２の３−３線に沿う断面図、図４は図３の４−４線に沿う拡大断面図、図５はその支持装置の分解斜視図である。   1 to 5 show a first embodiment of a support device for an engine exhaust system in a vehicle according to the present invention. FIG. 1 is a perspective view showing the engine exhaust system support device, and FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2, FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 3, and FIG. 5 is an exploded perspective view of the supporting device. It is.

図１に示すように、車両用エンジンとしての自動車のエンジンＥには、その運転により排出される排気ガスを大気中に放出するためのエンジン排気系Ｅｘが接続されている。そのエンジン排気系Ｅｘは、エンジンＥの排気ポートに排気マニホルドを介して接続されて後方に長く延びる排気管１と、その排気管１の下流部に接続される消音器Ｍとを備えている。消音器Ｍは、その縦軸線Ｌ−Ｌが車体Ｂの前後方向に沿うようにして、車体Ｂの下部に支持され、それによって、排気系Ｅｘの下流側部分が車体Ｂに支持されるようになっている。   As shown in FIG. 1, an engine exhaust system Ex for discharging exhaust gas discharged by the operation to the atmosphere is connected to an engine E of an automobile as a vehicle engine. The engine exhaust system Ex includes an exhaust pipe 1 that is connected to an exhaust port of the engine E via an exhaust manifold and extends rearward and a silencer M connected to a downstream portion of the exhaust pipe 1. The silencer M is supported by the lower part of the vehicle body B such that the longitudinal axis L-L is along the longitudinal direction of the vehicle body B, and thereby the downstream portion of the exhaust system Ex is supported by the vehicle body B. It has become.

消音器Ｍは、密閉された楕円筒状のもので、その前壁から前方に延びる入口管２の前端は、接続フランジ３を介して排気管１の下流端に接続されている。また、消音器Ｍの後壁からは２本のテールパイプ４，４が突出しており、そのテールパイプ４，４の後端が大気に開放されている。その消音器Ｍは、従来公知の消音構造を備えており、排気系Ｅｘを流れる排気ガスから発生する排気騒音を効果的に吸収するようにされている。   The silencer M has a sealed elliptic cylindrical shape, and the front end of the inlet pipe 2 extending forward from the front wall thereof is connected to the downstream end of the exhaust pipe 1 via the connection flange 3. Further, two tail pipes 4 and 4 protrude from the rear wall of the silencer M, and the rear ends of the tail pipes 4 and 4 are open to the atmosphere. The silencer M has a conventionally known silencer structure, and effectively absorbs exhaust noise generated from the exhaust gas flowing through the exhaust system Ex.

図１〜５に示すように、エンジン排気系Ｅｘの支持装置である消音器Ｍの支持装置は、車体Ｂの下部に固定される支持枠５と、消音器Ｍに固定される支持部材６とを備えている。その支持枠５は、上下前後の各面がそれぞれ上下壁７ａ，７ｂおよび前後壁７ｃ，７ｄによって閉鎖状に取り囲まれ、左右両側面が開放された短い四角筒状の弾性体支持枠部７と、その後壁７ｄから上方に延出する上部取付部８と、下壁７ｂから後方に延出する下部取付部９とを有している。そして、その上下部取付部８，９が、車体Ｂの下部において車幅方向に延びてフロアパネルＢｆを支持するクロスメンバＢｃの前面および下面に、それぞれボルト・ナット１０，１１によって固定されるようになっている。そのようにして支持枠５を固定することにより、その支持枠５の弾性体支持枠部７が車体Ｂの前後方向に平行となる。   As shown in FIGS. 1 to 5, the support device for the silencer M, which is a support device for the engine exhaust system Ex, includes a support frame 5 fixed to the lower part of the vehicle body B, and a support member 6 fixed to the silencer M. It has. The support frame 5 includes an elastic support frame portion 7 in the form of a short rectangular tube whose upper and lower front and rear surfaces are closed by upper and lower walls 7a and 7b and front and rear walls 7c and 7d, and left and right side surfaces are opened. The upper mounting part 8 extends upward from the rear wall 7d and the lower mounting part 9 extends rearward from the lower wall 7b. The upper and lower mounting portions 8 and 9 are fixed to the front and lower surfaces of the cross member Bc that extends in the vehicle width direction and supports the floor panel Bf by bolts and nuts 10 and 11, respectively. It has become. By fixing the support frame 5 in such a manner, the elastic body support frame portion 7 of the support frame 5 becomes parallel to the front-rear direction of the vehicle body B.

図２および図４から明らかなように、弾性体支持枠部７内には、ゴム材からなる弾性体１２が設けられている。その弾性体１２は、弾性体支持枠部７の左右幅と同じか、それよりも若干幅広の左右幅を有するもので、中央のブロック部１２ａと、そのブロック部１２ａの前面から前下方に向けて斜めに張り出す前腕部１２ｂと、ブロック部１２ａの後面から後上方に向けて張り出す後腕部１２ｃとを備えている。そして、その前腕部１２ｂの前端が弾性体支持枠部７の前壁７ｃと下壁７ｂとの間の角部内面に焼着され、後腕部１２ｃの後端が弾性体支持枠部７の上壁７ａと後壁７ｄとの間の角部内面に焼着されている。このようにして、弾性体１２は、その中央ブロック部１２ａが弾性体支持枠部７から離れて位置し、上下前後に移動可能な状態として、弾性体支持枠部７に固定されている。また、弾性体支持枠部７の上壁７ａと前壁７ｃとの間の角部内面、および下壁７ｂと後壁７ｄとの間の角部内面には、弾性体１２の中央ブロック部１２ａが上下前後に移動したとき当接するストッパゴム１３，１４がそれぞれ焼着されている。   As is clear from FIGS. 2 and 4, an elastic body 12 made of a rubber material is provided in the elastic body support frame portion 7. The elastic body 12 has a left-right width that is the same as or slightly wider than the left-right width of the elastic body support frame portion 7, and faces the front and lower sides of the central block portion 12a and the front surface of the block portion 12a. A forearm portion 12b projecting diagonally and a rear arm portion 12c projecting rearward and upward from the rear surface of the block portion 12a. Then, the front end of the forearm portion 12 b is baked on the inner surface of the corner between the front wall 7 c and the lower wall 7 b of the elastic body support frame portion 7, and the rear end of the rear arm portion 12 c is the elastic body support frame portion 7. It is baked on the inner surface of the corner between the upper wall 7a and the rear wall 7d. In this way, the elastic body 12 is fixed to the elastic body support frame portion 7 such that the central block portion 12a is located away from the elastic body support frame portion 7 and is movable up and down. Further, the central block portion 12a of the elastic body 12 is provided on the inner surface of the corner portion between the upper wall 7a and the front wall 7c of the elastic body support frame portion 7 and the inner surface of the corner portion between the lower wall 7b and the rear wall 7d. Stopper rubbers 13 and 14 that are in contact with each other when they move up and down and forward and backward are respectively baked.

さらに、弾性体１２の中央ブロック部１２ａの中心には、車体左右方向に貫通する支持孔１５が形成されている。そして、その支持孔１５に、前記支持部材６が挿通されて支持されるようになっている。図５から明らかなように、その支持部材６は屈曲した棒状のステーからなるもので、その支持部材６の基端部は、消音器Ｍの上部に取り付けられる前後方向の取付部材１６の中間部に貫通固定されている。また、支持部材６の先端部、すなわち自由端部は、車体左右方向に延びるようにされ、その先端にはポペット状の抜け出し防止部６ａが一体に形成されている。   Further, a support hole 15 penetrating in the left-right direction of the vehicle body is formed at the center of the central block portion 12a of the elastic body 12. The support member 6 is inserted into and supported by the support hole 15. As is apparent from FIG. 5, the support member 6 is formed of a bent bar-like stay, and the base end portion of the support member 6 is an intermediate portion of the front-rear mounting member 16 attached to the upper portion of the silencer M. It is fixed through. Further, the distal end portion of the support member 6, that is, the free end portion extends in the left-right direction of the vehicle body, and a poppet-shaped escape prevention portion 6 a is integrally formed at the distal end.

取付部材１６の固定のために、消音器Ｍの前後部の上縁には、その縦軸線Ｌ−Ｌから若干一側に偏らせて、前後部ブラケット１７，１８が固定されている。それらのブラケット１７，１８には、それぞれボルト孔１７ａ，１８ａが設けられている。一方、取付部材１６には、その前後両端部に、それぞれ取付ボルト１９，１９が固定されている。こうして、その取付ボルト１９，１９を前後部ブラケット１７，１８のボルト孔１７ａ，１８ａに挿通し、ナット２０，２０を締め付けることにより、取付部材１６が消音器Ｍの上部に固定されるようになっている。   In order to fix the mounting member 16, front and rear brackets 17 and 18 are fixed to the upper edges of the front and rear portions of the silencer M slightly offset from the longitudinal axis LL. These brackets 17 and 18 are provided with bolt holes 17a and 18a, respectively. On the other hand, mounting bolts 19 and 19 are fixed to the front and rear ends of the mounting member 16, respectively. Thus, the mounting bolts 19 and 19 are inserted into the bolt holes 17a and 18a of the front and rear brackets 17 and 18, and the nuts 20 and 20 are tightened, whereby the mounting member 16 is fixed to the upper portion of the silencer M. ing.

このように、エンジン排気系Ｅｘの一部を構成する消音器Ｍは、その消音器Ｍに固定される取付部材１６に固定された支持部材６を、車体Ｂに固定される支持枠５に固定された弾性体１２の支持孔１５に挿通して支持させることにより、弾性体１２を介して車体Ｂに弾性支持される。その弾性体１２は、車体Ｂの前方側から後方側に向かって斜め上方に延び、支持枠５と支持部材６とを連結する腕部１２ｂ，１２ｃを有している。   As described above, the silencer M constituting a part of the engine exhaust system Ex fixes the support member 6 fixed to the mounting member 16 fixed to the silencer M to the support frame 5 fixed to the vehicle body B. The elastic body 12 is elastically supported by the vehicle body B through the elastic body 12 by being inserted into and supported by the support hole 15 of the elastic body 12. The elastic body 12 extends obliquely upward from the front side to the rear side of the vehicle body B, and has arm portions 12 b and 12 c that connect the support frame 5 and the support member 6.

つぎに、この第１実施例の作用について説明する。   Next, the operation of the first embodiment will be described.

車両の走行中、車体Ｂが上下方向に振動すると、その振動が弾性体１２を介してエンジン排気系Ｅｘにも伝えられる。その場合、エンジン排気系Ｅｘは車体Ｂとは異なる振動系を構成するので、その排気系Ｅｘは車体Ｂに対して相対的に振動することになる。   When the vehicle body B vibrates in the vertical direction while the vehicle is traveling, the vibration is transmitted to the engine exhaust system Ex via the elastic body 12. In that case, the engine exhaust system Ex constitutes a vibration system different from the vehicle body B, so that the exhaust system Ex vibrates relative to the vehicle body B.

たとえば、いま、車両が路面上の小さな突起に乗り上げ、車体Ｂが上方に移動したとする。そのとき、排気系Ｅｘは慣性力によりその位置を保持しようとするので、排気系Ｅｘの消音器Ｍに固定されている支持部材６は、車体Ｂに固定されている支持枠５に対して相対的に下方に移動しようとする。すなわち、支持部材６には下方に向けての力が加えられる。その力を図４におけるＦとする。弾性体１２がなければ、その入力Ｆによって支持部材６は下方に移動する。   For example, suppose that the vehicle now rides on a small protrusion on the road surface and the vehicle body B moves upward. At that time, since the exhaust system Ex tries to maintain its position by inertial force, the support member 6 fixed to the silencer M of the exhaust system Ex is relative to the support frame 5 fixed to the vehicle body B. Try to move downward. That is, a downward force is applied to the support member 6. The force is F in FIG. If there is no elastic body 12, the support member 6 moves downward by the input F.

ところが、弾性体１２には、圧縮方向にはできるだけ変形せずに、剪断方向に変形しようとする性質がある。また、その弾性体１２によって支持される支持部材６に、前後の腕部１２ｂ，１２ｃがほぼ均等に変形する方向に力を与える性質がある。その結果、支持部材６は、図示されているＰの力でＰの方向に変位することになる。その力Ｐは、車体Ｂからの入力Ｆとほぼ同じ大きさで、弾性体１２の前後の腕部１２ｂ，１２ｃにほぼ直交する方向となる。すなわち、車体前後方向の成分を含む方向となる。したがって、その力Ｐの上下方向の成分Ｐｖは、車体Ｂからの入力Ｆよりも小さくなる。   However, the elastic body 12 has the property of being deformed in the shearing direction without being deformed as much as possible in the compression direction. Further, the support member 6 supported by the elastic body 12 has a property of applying a force in a direction in which the front and rear arm portions 12b and 12c are deformed substantially uniformly. As a result, the support member 6 is displaced in the direction P by the illustrated force P. The force P has substantially the same magnitude as the input F from the vehicle body B, and is in a direction substantially orthogonal to the front and rear arm portions 12b, 12c of the elastic body 12. That is, the direction includes the longitudinal component of the vehicle body. Therefore, the vertical component Pv of the force P is smaller than the input F from the vehicle body B.

このようにして、車体Ｂの上下方向の振動は、弾性体１２により、車体前後方向の振動成分を含む方向の振動に変換されて、エンジン排気系Ｅｘに伝達される。したがって、車体Ｂの振動がサスペンションのダンパによって止まり、排気系Ｅｘの振動のみが継続する場合にも、その排気系Ｅｘから逆に車体Ｂに伝達される上下方向の振動は、当初車体Ｂからエンジン排気系Ｅｘに伝達された振動よりも小さくなる。そして、一般に、車両の車体ＢのフロアパネルＢｆは、上下方向の剛性が低く、上下方向の振動が入力されると、車室内でその振動が感じられやすいので、乗り心地に大きな影響を及ぼす。本発明の弾性体１２によれば、上述のように、エンジン排気系Ｅｘから車体Ｂに伝達される上下方向の振動成分が小さくなるので、乗り心地の低下が防止される。   In this way, the vertical vibration of the vehicle body B is converted by the elastic body 12 into vibration including a vibration component in the vehicle longitudinal direction, and transmitted to the engine exhaust system Ex. Therefore, even when the vibration of the vehicle body B is stopped by the suspension damper and only the vibration of the exhaust system Ex is continued, the vertical vibration transmitted from the exhaust system Ex to the vehicle body B on the contrary is initially transmitted from the vehicle body B to the engine. It becomes smaller than the vibration transmitted to the exhaust system Ex. In general, the floor panel Bf of the vehicle body B of the vehicle has low rigidity in the vertical direction, and when vibrations in the vertical direction are input, the vibrations are easily felt in the passenger compartment, which greatly affects riding comfort. According to the elastic body 12 of the present invention, as described above, the vibration component in the vertical direction transmitted from the engine exhaust system Ex to the vehicle body B is reduced, so that a reduction in riding comfort is prevented.

つぎに、図６を参照して本発明の第２実施例について説明する。   Next, a second embodiment of the present invention will be described with reference to FIG.

図６は、本発明によるエンジン排気系の支持装置の第２実施例を示す要部の拡大側面図である。   FIG. 6 is an enlarged side view of an essential part showing a second embodiment of the engine exhaust system support device according to the present invention.

なお、この第２実施例において、第１実施例と異なる部分は支持枠および弾性体の形状であるので、第１実施例と対応する部分には同一の符号を付すことにより、重複する説明は省略する。   In this second embodiment, since the parts different from the first embodiment are the shape of the support frame and the elastic body, the same reference numerals are given to the parts corresponding to the first embodiment, and the overlapping description will be omitted. Omitted.

図６に示すように、この第２実施例の場合には、支持枠５の弾性体支持枠部２７が、上下壁２７ａ，２７ｂ、前後壁２７ｃ，２７ｄ、およびその前壁２７ｃと下壁２７ｂとの間の角部を面取りする斜壁２７ｅによって閉鎖状に取り囲まれ、左右両側面が開放された、短い五角筒状とされている。また、弾性体３２は、車幅方向に貫通する支持孔１５を有するブロック部３２ａと、そのブロック部３２ａの前面下部から前下方に向けて斜めに張り出す前上腕部３２ｂと、ブロック部３２ａの下面前部から同じく前下方に向けて張り出す前下腕部３２ｃとを備えている。そして、その前上腕部３２ｂおよび前下腕部３２ｃの各前端が弾性体支持枠部２７の斜壁２７ｅの内面に焼着されている。このようにして、弾性体３２は、そのブロック部３２ａが弾性体支持枠部２７から離れて位置し、上下前後に移動可能な状態として、弾性体支持枠部２７に固定されている。   As shown in FIG. 6, in the case of the second embodiment, the elastic body support frame portion 27 of the support frame 5 includes upper and lower walls 27a and 27b, front and rear walls 27c and 27d, and front and lower walls 27c and 27b. It is made into the short pentagonal cylinder shape enclosed by the slant wall 27e which chamfers the corner | angular part between these, and the both right and left side surfaces were open | released. The elastic body 32 includes a block portion 32a having a support hole 15 penetrating in the vehicle width direction, a front upper arm portion 32b projecting obliquely from the lower front portion of the block portion 32a toward the front lower side, and a block portion 32a. A front lower arm portion 32c is also provided that projects from the lower surface front portion toward the front lower side. The front ends of the front upper arm portion 32 b and the front lower arm portion 32 c are baked on the inner surface of the inclined wall 27 e of the elastic body support frame portion 27. In this way, the elastic body 32 is fixed to the elastic body support frame 27 so that the block portion 32a is located away from the elastic body support frame 27 and is movable up and down.

その他の構成は第１実施例と同様であるので、その詳細な説明は省略する。   Since the other configuration is the same as that of the first embodiment, its detailed description is omitted.

このような構成を有するエンジン排気系の支持装置においても、車体Ｂから上下方向の振動が入力されると、その振動は、弾性体３２により、前後方向の振動成分を含む斜め方向の振動として、エンジン排気系Ｅｘを支持する支持部材６に伝えられる。したがって、エンジン排気系Ｅｘは斜め方向に振動することになり、その排気系Ｅｘから車体Ｂに伝達される上下方向の振動成分が小さくなるので、車両の乗り心地の低下が防止される。   Even in the engine exhaust system support device having such a configuration, when vertical vibration is input from the vehicle body B, the vibration is caused by the elastic body 32 as oblique vibration including a vibration component in the front-rear direction. It is transmitted to the support member 6 that supports the engine exhaust system Ex. Therefore, the engine exhaust system Ex vibrates in an oblique direction, and the vertical vibration component transmitted from the exhaust system Ex to the vehicle body B is reduced, so that the ride comfort of the vehicle is prevented from being lowered.

以上、本発明の第１および第２実施例について説明したが、本発明はそれらの実施例に限定されることなく、本発明の範囲内で種々の実施例が可能である。   Although the first and second embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention.

たとえば、弾性体１２，３２の腕部１２ｂ，１２ｃ；３２ｂ，３２ｃは、上記各実施例のように車体の前方側から後方側に向かって斜め上方に延びるものとする代わりに、車体の前方側から後方側に向かって斜め下方に延びるものとすることもできる。また、支持枠５を車体Ｂ側に固定し、支持部材６をエンジン排気系Ｅｘに固定する代わりに、支持枠５をエンジン排気系Ｅｘ側に、支持部材６を車体Ｂ側に、それぞれ固定するようにしてもよい。   For example, the arm portions 12b, 12c; 32b, 32c of the elastic bodies 12, 32 extend obliquely upward from the front side to the rear side of the vehicle body as in the above embodiments, instead of the front side of the vehicle body. It is also possible to extend obliquely downward from the rear toward the rear side. Further, instead of fixing the support frame 5 to the vehicle body B side and fixing the support member 6 to the engine exhaust system Ex, the support frame 5 is fixed to the engine exhaust system Ex side and the support member 6 is fixed to the vehicle body B side. You may do it.

本発明の第１実施例の車両におけるエンジン排気系の支持装置を示す斜視図The perspective view which shows the support apparatus of the engine exhaust system in the vehicle of 1st Example of this invention. 図１の矢印２方向から見た側面図Side view seen from the direction of arrow 2 in FIG. 図２の３−３線に沿う断面図Sectional view along line 3-3 in FIG. 図３の４−４線に沿う拡大断面図Enlarged cross-sectional view along line 4-4 in FIG. そのエンジン排気系の支持装置の分解斜視図An exploded perspective view of a support device for the engine exhaust system 本発明の第２実施例を示す図４と同様の断面図Sectional view similar to FIG. 4 showing the second embodiment of the present invention

符号の説明Explanation of symbols

５・・・・支持枠
６・・・・支持部材
１２・・・弾性体
１２ｂ・・前上腕部
１２ｃ・・前下腕部
１５・・・支持孔
３２・・・弾性体
３２ｂ・・腕部
３２ｃ・・腕部
Ｂ・・・・車体
Ｅ・・・・エンジン
Ｅｘ・・・エンエンジン排気系
Ｍ・・・・消音器
5 ··· Support frame 6 ··· Support member 12 · · · Elastic body 12b · · Front upper arm portion 12c · · Front lower arm portion 15 · · · Support hole 32 · · · Elastic body 32b · · Arm portion 32c ... Arm B ... Body E ... Engine Ex ... Engine exhaust system M ... Silencer

Claims (2)

車両用エンジン（Ｅ）の排気系（Ｅｘ）を、弾性体（１２，３２）を介して車体（Ｂ）に弾性支持するようにした車両におけるエンジン排気系の支持装置において、
前記弾性体（１２，３２）が、車体（Ｂ）の上下方向の振動を、前後方向の振動成分を含む振動に変換して前記排気系（Ｅｘ）に伝達する形状に形成されていることを特徴とする、車両におけるエンジン排気系の支持装置。 In a support device for an engine exhaust system in a vehicle, the exhaust system (Ex) of the vehicle engine (E) is elastically supported on the vehicle body (B) via the elastic bodies (12, 32).
The elastic body (12, 32) is formed in a shape that converts the vertical vibration of the vehicle body (B) into vibration including a vibration component in the front-rear direction and transmits the vibration to the exhaust system (Ex). A support device for an engine exhaust system in a vehicle. 前記支持装置が、前記車体（Ｂ）および排気系（Ｅｘ）のいずれか一方（Ｂ）に固定される支持枠（５）と、その他方（Ｅｘ）に固定される支持部材（６）とを備えており、
前記弾性体（１２，３２）が、車体（Ｂ）の前方側から後方側に向かって斜め上下方向に延び、前記支持枠（５）と支持部材（６）とを連結する腕部（１２ｂ，１２ｃ；３２ｂ，３２ｃ）を有していることを特徴とする、請求項１記載の車両におけるエンジン排気系の支持装置。
The support device includes a support frame (5) fixed to one of the vehicle body (B) and the exhaust system (Ex), and a support member (6) fixed to the other (Ex). With
Arms (12b, 12c; 32b, 32c). The support device for an engine exhaust system in a vehicle according to claim 1,
JP2003353806A 2003-10-14 2003-10-14 Support device for engine exhaust system in vehicle Expired - Fee Related JP4206323B2 (en)

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JP2007106212A (en) * 2005-10-12 2007-04-26 Nissan Motor Co Ltd Support structure of muffler
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US8066266B2 (en) 2008-03-06 2011-11-29 The Pullman Company End plated shear-hub isolator
WO2009111117A1 (en) * 2008-03-06 2009-09-11 The Pullman Company End plated shear-hub isolator
US8376331B2 (en) 2008-03-06 2013-02-19 The Pullman Company External shear-hub isolator
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WO2009114517A3 (en) * 2008-03-10 2009-11-12 The Pullman Company External shear-hub isolator
US8152146B2 (en) 2008-03-10 2012-04-10 The Pullman Company External shear-hub isolator
US7931119B2 (en) 2009-08-26 2011-04-26 Suzuki Motor Corporation Support structure for exhaust pipe
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DE102013113613A1 (en) * 2013-12-06 2015-06-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Exhaust system for a motor vehicle

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