JPS58126418A - Muffler apparatus for motorcycle etc. - Google Patents

Abstract

PURPOSE:To reduce the noise by forming a narrowed passage in a muffler fail by dividing said muffler tail and introducing the exhaust outside through said passage, thus eliminating the resonance generated in the case when exhaust is introduced as it is into a vacant space. CONSTITUTION:A muffler body 1 is equipped with a front inflow part 2 inside, the second expansion chamber 4 at the back which communicates to the front inflow chamber 2 through an inflow pipe 3, and the intermediate third expansion chamber 6 which communicates to the second expansion chamber 4 through a communication pipe 5, while a pair of outflow pipes 7 which are extended rearward are installed in parallel onto the third expansion chamber 6. Those outflow pipes are opened at the tail end of the muffler body 1, and a pair of exhaust outlets 8 are arranged there. A narrowed passage 12 in the longitudinal direction is formed in a vacant space 10 by dividing said vacant space 10, and the exhaust obtained at the exhaust outlet 8 is discharged outside from the end of a tail 11 through the space after the outlet 8 and the passage which communicates to the space.

Description

【発明の詳細な説明】 本発明は主として自動２輪車等の車両において、車体の
側面に沿って前後方向にのびる式のマフラ装置に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a muffler device of a type that extends in the longitudinal direction along the side surface of a vehicle body, mainly in a vehicle such as a two-wheeled motor vehicle.

従来この種装置において、例えば第１図或は第２図示の
ようにエンジンの排気側に連る７７う本体ａの後部に、
その外周壁を延長して内部を空洞部すとするマフラテー
ルＣを一体に形成させかくて該テールにより全体として
優れた外観に得られるようにした式のものは知られるが
、か＼るものでは該マフラ本体ａの尾端に開口する排気
出口に得られる排気は次で該空洞部す内に導かれてこれ
に共鳴を生じ、騒音レベルの上昇を伴い勝ちである不都
合を伴う。Conventionally, in this type of device, for example, as shown in FIG.
A type of muffler is known in which a muffler tail C is integrally formed by extending the outer circumferential wall of the muffler and making the inside hollow, thereby providing an excellent appearance as a whole. The exhaust gas obtained at the exhaust outlet opening at the tail end of the muffler body a is then led into the cavity and causes resonance therein, with the attendant disadvantages of increasing the noise level.

本発明はか＼る不都合のない装置を得ることをその目的
としたもので、エンジンの排気側に連るマフラ本体の後
部に、その外周壁を延長して内部を空洞部とする７７ラ
テールを一体に形成させる式のものにおいて、該マフラ
テール内にこれを区劃して狭搾する前後方向の通路を形
成させ該マフラ本体の尾端に開口する排気出口に得られ
る排気を該通路内を介して該マフラテールの尾端から外
部に排出させるようにして成る。The purpose of the present invention is to obtain a device that does not have such inconveniences, and has a 77 rattle at the rear of the muffler main body connected to the exhaust side of the engine, the outer peripheral wall of which is extended to form a hollow interior. In the integrally formed type, a longitudinal passage is formed in the muffler tail to separate and narrow it, and the exhaust gas obtained at the exhaust outlet opening at the tail end of the muffler body is passed through the passage. The muffler tail is discharged to the outside from the tail end of the muffler tail.

本発明の実施例を別紙図面１こ・付説明する。An embodiment of the present invention will be described with reference to attached drawing 1.

第３図及び第４図はその１例を示すもので、（１）はエ
ンジンの排気側に連るマフラ本体を示し、該本体（１）
はその内部に前方の流入室（２）と、これに流入管（３
）を介して連る後方の第２膨張室（４）と、これに連管
（５）を介して連る中間の第３膨張室（６）とを備える
と共に該第３膨張室（６）に後方にのびる１対の流出管
（７）　（７）を並設してこれらを該マフラ本体（１）
の尾端に開口させ該部に１対の排気用う本体（１）・の
後部に、その外周壁を延長して内部を空洞部００）とす
るマフラテールαＩ）を一体に形成させ、その尾端を例
えば斜めに切断して全体としてその体裁を良好にするよ
うにした。Figures 3 and 4 show one example, where (1) shows a muffler main body connected to the exhaust side of the engine;
has a front inflow chamber (2) and an inflow pipe (3) inside it.
), and an intermediate third expansion chamber (6) connected thereto via a connecting pipe (5), and the third expansion chamber (6). A pair of outflow pipes (7) (7) extending rearward are installed in parallel to the muffler body (1).
A muffler tail αI) whose outer peripheral wall is extended to form a hollow part 00) is integrally formed at the rear of the main body (1), which opens at the tail end of the main body (1) and has a pair of exhaust gases in the part. For example, the edges are cut diagonally to improve the overall appearance.

以上は従来のものと特に異らないが、本発明によれば該
空洞部θ０）内にこれを区劃して狭搾する前後方向の通
路（１２）を形成させ、前記した排気出口（８）　（８
１に得られる排気をその後方の空間（１３）内とこれに
連る該通路０り内とを介して該テールα１）の尾端から
外部に排出させるよう（こした。図示のものでは該空洞
部曲内に外周に環状の隙間を残して筒状の中子αηを挿
入して外周のブラケットα（その他で固定とし、かくて
該環状の隙間内とその前方とに前記した通路α２と前記
した空間θ３）とが得られるようにした。Although the above is not particularly different from the conventional one, according to the present invention, a longitudinal passage (12) is formed in the cavity θ0) to partition and narrow it, and the above-mentioned exhaust outlet (8) is formed. ) (8
The exhaust gas obtained in step 1 is discharged to the outside from the tail end of the tail α1) through the space (13) behind the space (13) and the passageway connected thereto. A cylindrical core αη is inserted into the hollow curve, leaving an annular gap on the outer periphery, and is fixed with a bracket α on the outer periphery. The above-mentioned space θ3) was made to be obtained.

第５図はその変形例を示すもので、前記した中子婦に代
え、前方の区劃壁（１５１とこれから後方にのびる比較
的小径のパイプ（１６１とを備え、かくて該壁（国の前
方と、該パイプ０６）内とが前記した空間０３）と前記
した通路ａ力とに作られるようにした。Fig. 5 shows a modified example of this, in which, in place of the above-mentioned central pipe, it is equipped with a front partition wall (151) and a relatively small diameter pipe (161) extending rearward from the wall (151). The front and inside of the pipe 06) are made to be the space 03) described above and the passage a force described above.

このように本発明によるときは内部を空洞部とする７７
ラテール内に排気をそのま＼を導くことなく、該テール
内にこの区劃して狭搾する通路を形成させ、該排気をこ
れを介してその後方から外部に導かせるもので、該排気
が該空洞部にそのま＼導かれる場合に生じ易い共鳴を無
くシ、騒音レベルを低下させ得られる効果を有する。In this way, according to the present invention, the interior is a hollow portion 77
Instead of directly guiding the exhaust gas into the tail, a narrow passage is formed in the tail, and the exhaust gas is guided to the outside from behind through this. It has the effect of eliminating the resonance that tends to occur when directly guided into the cavity, and reducing the noise level.

【図面の簡単な説明】[Brief explanation of drawings]

第１図及び第２図は従来例の各平面図、第３図は本発明
装置の１例の一部を截除した側面図、＄４図はその一部
を截除した平面図、第５図はその変形例の要部の裁断平
面図である。 （１）・・・マフラ本体 αＯ）・・・空　洞　部 ａυ・・・７７ラテール （８）（８）・・・排気出口 ａカ・・・通　　　路 外２名1 and 2 are plan views of the conventional example, FIG. 3 is a partially cut-away side view of an example of the device of the present invention, FIG. 4 is a partially cut-away plan view, and FIG. FIG. 5 is a cutaway plan view of the main part of the modified example. (1)...Muffler body αO)...Cavity part aυ...77 tail (8) (8)...Exhaust outlet a...2 people outside the passage

Claims (1)

【特許請求の範囲】[Claims] エンジンの排気側に連るマフラ本体の後部に、その外周
壁を延長して内部を空洞部とするマフラテールを一体に
形成させる式のものにおいて、該マフラテール内にこれ
を区劃して狭搾する前後方向の通路を形成させ該マフラ
本体の尾端に開口する排気出口に得られる排気を該通路
内を介して該マフラテールの尾端から外部に排出させる
ようにして成る自動２輪車等のマフラ装置In a type in which a muffler tail is integrally formed at the rear of the muffler main body connected to the exhaust side of the engine by extending its outer peripheral wall to form a hollow interior, the muffler tail is sectioned and narrowed within the muffler tail. A muffler for a two-wheeled motor vehicle, etc., which is configured to form a passage in the front-rear direction and discharge exhaust gas obtained from an exhaust outlet opening at the tail end of the muffler body to the outside from the tail end of the muffler tail through the passage. Device