JP2001159312A - Secondary air feeding device for forced-air-cooled engine - Google Patents
Secondary air feeding device for forced-air-cooled engineInfo
- Publication number
- JP2001159312A JP2001159312A JP2000376504A JP2000376504A JP2001159312A JP 2001159312 A JP2001159312 A JP 2001159312A JP 2000376504 A JP2000376504 A JP 2000376504A JP 2000376504 A JP2000376504 A JP 2000376504A JP 2001159312 A JP2001159312 A JP 2001159312A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- cowl
- reed valve
- exhaust port
- secondary air
- 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.)
- Granted
Links
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は二輪車用強制空冷エン
ジンに係り、特に強制空冷エンジンの２次空気供給装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced air-cooled engine for a motorcycle, and more particularly to a secondary air supply device for a forced air-cooled engine.
【０００２】[0002]
【従来の技術】強制空冷エンジンにおいては、シリンダ
の排気系に排気ガスの浄化等のため２次空気を供給する
ことが行なわれている。この２次空気の供給手段として
はエキゾーストパイプに２次空気を入れるもの、あるい
はシリンダの壁面からエキゾーストパイプの排気通路へ
２次空気を入れるものなどが知られている。2. Description of the Related Art In a forced air-cooled engine, secondary air is supplied to an exhaust system of a cylinder for purifying exhaust gas or the like. As a means for supplying the secondary air, a means for supplying secondary air to an exhaust pipe or a means for supplying secondary air from a wall surface of a cylinder to an exhaust passage of the exhaust pipe is known.
【０００３】[0003]
【発明が解決しようとする課題】従来の強制空冷エンジ
ンではシリンダがシリンダカウル（カウリング）により
覆われているので排気ポートに２次空気を入れることが
難かしく、またエキゾーストパイプに入れようとすると
このパイプの温度は高温であるためゴムホースを用いた
場合に不都合がある。In a conventional forced air-cooled engine, since the cylinder is covered by a cylinder cowl (cowling), it is difficult to supply secondary air to an exhaust port. Since the temperature of the pipe is high, there is an inconvenience when a rubber hose is used.
【０００４】この発明は、上述した事情を考慮してなさ
れたもので、２次空気を円滑かつスムーズに能率よく供
給して排気ガス等の浄化を有効的に効率よく行なうよう
にした強制空冷エンジンの２次空気供給装置を提供する
ことを目的とする。The present invention has been made in view of the above circumstances, and has a forced air-cooled engine which supplies secondary air smoothly and efficiently to efficiently and efficiently purify exhaust gas and the like. It is an object of the present invention to provide a secondary air supply device.
【０００５】この発明の他の目的は、弁ケース壁面を２
次空気供給用リードバルブ装置の弁ガイド部として積極
的に活用し、部品点数の削減を図り、コストを低減させ
るとともに配管の自由度を向上させた強制空冷エンジン
の２次空気供給装置を提供するにある。Another object of the present invention is to provide a valve case having two walls.
A secondary air supply device for a forced air-cooled engine that is actively used as a valve guide portion of a reed valve device for secondary air supply, reduces the number of parts, reduces cost and improves flexibility in piping. It is in.
【０００６】この発明のさらに他の目的は、金属製連結
管を２次空気供給通路に利用し、金属製連結管の取付や
配管自由度を向上させ、耐熱性や耐久性に優れた強制空
冷エンジンの２次空気供給装置を提供するにある。Still another object of the present invention is to use a metal connecting pipe as a secondary air supply passage, improve the mounting of the metal connecting pipe and the degree of freedom of piping, and perform forced air cooling excellent in heat resistance and durability. The present invention provides a secondary air supply device for an engine.
【０００７】この発明の別の目的は、リードバルブ装置
をシリンダカウル上部に着脱自在とし、取付の自由度を
向上させ、取付作業を簡素化し、メンテナンス性を向上
させた強制空冷エンジンの２次空気供給装置を提供する
にある。Another object of the present invention is to make the reed valve device detachable on the upper part of the cylinder cowl, improve the degree of freedom of mounting, simplify the mounting work, and improve the maintainability of the secondary air of the forced air cooling engine. Providing a supply device.
【０００８】[0008]
【課題を解決するための手段】この発明に係る強制空冷
エンジンの２次空気供給装置は、上述した課題を解決す
るため、請求項１に記載したように、シリンダをシリン
ダカウルで覆いシリンダ一側の強制空冷ファンからの冷
却風をシリンダに圧送しシリンダ他側の排風口から排出
する二輪車用強制空冷エンジンにおいて、２次空気供給
用リードバルブ装置を前記シリンダカウルにこのシリン
ダカウルと一体の取付座に固着手段によって着脱自在に
固着し、上記リードバルブ装置内のリードバルブをその
撓み作動方向を前記シリンダカウルの壁面に対し直角方
向となるように配設し、前記リードバルブ装置の取出用
ユニオンはリードバルブの自由端のほぼ延長線側に開口
したものである。In order to solve the above-mentioned problems, a secondary air supply device for a forced air-cooled engine according to the present invention covers a cylinder with a cylinder cowl and has one side of the cylinder cowl. In a forced air cooling engine for motorcycles, in which the cooling air from the forced air cooling fan is sent to the cylinder and discharged from an exhaust port on the other side of the cylinder, a reed valve device for supplying secondary air is attached to the cylinder cowl with a mounting seat integral with the cylinder cowl. The reed valve in the reed valve device is disposed so that its bending operation direction is perpendicular to the wall surface of the cylinder cowl. The reed valve is opened substantially on the extension line side of the free end.
【０００９】また、この発明に係る強制空冷エンジンの
２次空気供給装置は、上述した課題を解決するため、請
求項２に記載したように、シリンダをシリンダカウルで
覆いシリンダ一側の強制空冷ファンからの冷却風をシリ
ンダに圧送しシリンダ他側の排風口から排出する二輪車
用強制空冷エンジンにおいて、２次空気供給用リードバ
ルブ装置を前記シリンダカウルにこのシリンダカウルと
一体の取付座に固着手段によって着脱自在に固着し、上
記リードバルブ装置内のリードバルブをその撓み作動方
向を前記シリンダカウルの壁面に対し直角方向となるよ
うに配設して弁ケースの壁面に弁ガイド部を構成し、前
記リードバルブ装置の一側面と直角方向の他側面に供給
用ユニオンと取出用ユニオンをそれぞれ設け、この取出
用ユニオンに連結管を介して金属製連結管が連結され、
この金属製連結管は前記強制空冷ファンと反対側のエン
ジン排気ポートの周壁に固定し、排気ポートに開口させ
たものである。In order to solve the above-mentioned problem, a secondary air supply device for a forced air-cooled engine according to the present invention covers a cylinder with a cylinder cowl and a forced air-cooling fan on one side of the cylinder. In a forced air-cooled engine for motorcycles in which the cooling air from the cylinder is fed to the cylinder and discharged from the exhaust port on the other side of the cylinder, a secondary air supply reed valve device is attached to the cylinder cowl by means of fixing to a mounting seat integral with the cylinder cowl. The reed valve in the reed valve device is removably fixed and disposed so that its bending operation direction is perpendicular to the wall surface of the cylinder cowl to form a valve guide portion on the wall surface of the valve case. A supply union and an union for unloading are provided on one side of the reed valve device and the other side in the direction perpendicular to the reed valve unit, and connected to this union for union Metal connecting tube is connected via a
This metal connecting pipe is fixed to the peripheral wall of the engine exhaust port on the opposite side of the forced air cooling fan, and is opened to the exhaust port.
【００１０】さらに、この発明に係る強制空冷エンジン
の２次空気供給装置は、上述した課題を解決するため、
請求項３に記載したように、シリンダをシリンダカウル
で覆いシリンダ一側の強制空冷ファンからの冷却風をシ
リンダに圧送しシリンダ他側の排風口から排出する二輪
車用強制空冷エンジンにおいて、２次空気供給用リード
バルブ装置を前記シリンダカウルにこのシリンダカウル
と一体の取付座に固着手段によって着脱自在に固着し、
上記リードバルブ装置の下流側を金属製連結管を介して
エンジン排気ポートに連通させ、上記金属製連結管はシ
リンダ側部の冷却風排風口の近傍位置で、しかも前記強
制空冷ファンと反対側の排気ポート周壁に固定し、排気
ポートに開口させたものである。Further, a secondary air supply device for a forced air-cooled engine according to the present invention is provided to solve the above-described problems.
As described in claim 3, in the forced air-cooled engine for a motorcycle, the cylinder is covered with a cylinder cowl and cooling air from a forced air cooling fan on one side of the cylinder is pressure-fed to the cylinder and discharged from an exhaust port on the other side of the cylinder. A supply reed valve device is removably fixed to the cylinder cowl by a fixing means on a mounting seat integral with the cylinder cowl,
The downstream side of the reed valve device is communicated with an engine exhaust port via a metal connecting pipe, and the metal connecting pipe is located at a position near the cooling air exhaust port on the side of the cylinder, and on the side opposite to the forced air cooling fan. It is fixed to the peripheral wall of the exhaust port and opened to the exhaust port.
【００１１】さらにまた、この発明に係る強制空冷エン
ジンの２次空気供給装置は、上述した課題を解決するた
め、請求項４に記載したように、シリンダをシリンダカ
ウルで覆いシリンダ一側の強制空冷ファンからの冷却風
をシリンダに圧送しシリンダ他側の排風口から排出する
二輪車用強制空冷エンジンにおいて、２次空気供給用リ
ードバルブ装置を前記シリンダカウルにこのシリンダカ
ウルと一体の取付座に固着手段によって着脱自在に固着
し、上記リードバルブ装置は略水平型エンジンのシリン
ダカウルの上部上に装着し、上記エンジンの下部にエン
ジン排気ポートを形成し、その排気ポートに開口するよ
うに側方から金属製連結管を取り付け、略水平型エンジ
ンの一側方に前記冷却ファンを装着したものである。Further, in order to solve the above-mentioned problem, the secondary air supply device for a forced air-cooled engine according to the present invention covers the cylinder with a cylinder cowl and forcibly air-cools the cylinder on one side. In a forced air cooling engine for motorcycles, in which cooling air from a fan is sent to a cylinder by pressure and discharged from an exhaust port on the other side of the cylinder, a secondary air supply reed valve device is fixed to the cylinder cowl to a mounting seat integral with the cylinder cowl. The reed valve device is mounted on the upper part of a cylinder cowl of a substantially horizontal engine, an engine exhaust port is formed at the lower part of the engine, and a metal is opened from the side so as to open to the exhaust port. The cooling fan is attached to one side of a substantially horizontal engine.
【００１２】[0012]
【実施例】この発明に係る強制空冷エンジンの２次空気
供給装置の実施の形態について添付図面を参照して説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a secondary air supply device for a forced air cooling engine according to the present invention will be described with reference to the accompanying drawings.
【００１３】図１は強制空冷エンジン１のシリンダ２の
排気ポート３の部分で切断した断面図を示しており、図
２はスクータタイプの２輪車に実装した場合の全体図を
示している。強制空冷エンジン１にはシリンダ２を略水
平方向に前傾させた水平型エンジンが用いられる。FIG. 1 is a cross-sectional view of the forced air-cooled engine 1 cut along a portion of an exhaust port 3 of a cylinder 2, and FIG. 2 is an overall view of a case where the engine is mounted on a scooter type motorcycle. As the forced air-cooled engine 1, a horizontal engine in which a cylinder 2 is inclined forward in a substantially horizontal direction is used.
【００１４】シリンダ２はカウリングとしてのシリンダ
カウル４によりその周囲が覆われて、内部に冷却風の通
路が形成される。このシリンダカウル４の一側部にはフ
ァンケース５が連設され、このファンケース５内に強制
空冷ファン６が設けられる。強制空冷ファン６の回転で
シリンダ２の一側のファンカウル４の冷却風入口７から
吸い込まれた外気をシリンダ２の他側へ向けて冷却風通
路を通して強制的に送風し、シリンダ２を冷却する。シ
リンダ２を冷却した冷却風はシリンダ２反対側の冷却風
排風口８から外部に排出される。シリンダ２には冷却効
率を高めるため冷却フィン９が設けられている。The periphery of the cylinder 2 is covered with a cylinder cowl 4 as a cowling, and a passage for cooling air is formed inside. A fan case 5 is connected to one side of the cylinder cowl 4, and a forced air cooling fan 6 is provided in the fan case 5. The outside air sucked from the cooling air inlet 7 of the fan cowl 4 on one side of the cylinder 2 by the rotation of the forced air cooling fan 6 is forcibly blown through the cooling air passage toward the other side of the cylinder 2 to cool the cylinder 2. . The cooling air that has cooled the cylinder 2 is discharged outside through a cooling air discharge port 8 on the opposite side of the cylinder 2. The cylinder 2 is provided with cooling fins 9 to increase the cooling efficiency.
【００１５】シリンダ２の排気ポート３には、その周壁
１０を貫通するように２次空気供給孔１８が形成されて
開口しており、この２次空気供給孔１８にユニオン等の
連結管を構成する金属取付管１１の先端がねじ１２によ
りねじ結合されて、シリンダ２に固定される。この取付
管１１はシリンダカウル４の前記排風口８の近傍の孔１
３を貫通してシリンダカウル４の外部に突出されてお
り、この突出する部分に締付用の六角ナット部１４が一
体に設けられている。A secondary air supply hole 18 is formed and opened in the exhaust port 3 of the cylinder 2 so as to penetrate the peripheral wall 10. A connection pipe such as a union is formed in the secondary air supply hole 18. The distal end of the metal mounting tube 11 is screwed together with the screw 12 and fixed to the cylinder 2. The mounting pipe 11 is provided with a hole 1 near the exhaust port 8 of the cylinder cowl 4.
3, and is projected to the outside of the cylinder cowl 4, and a hexagonal nut portion 14 for tightening is integrally provided at the projected portion.
【００１６】一方、シリンダカウル４の外部には２次空
気供給用のリードバルブ装置１５の取付座１６が複数突
設されており、この取付座１６に囲まれる収納スペース
１７にリードバルブ装置１５がねじ止め等の固着手段で
取り付けられ、装着される。リードバルブ装置１５は２
分割可能な弁ケース２０内に収容された弁体２１の弁座
に装着されたリードバルブ２２を備える。On the other hand, a plurality of mounting seats 16 of a reed valve device 15 for supplying secondary air are provided outside the cylinder cowl 4, and the reed valve device 15 is provided in a storage space 17 surrounded by the mounting seat 16. It is attached and attached by fixing means such as screwing. The reed valve device 15 is 2
It has a reed valve 22 mounted on a valve seat of a valve element 21 housed in a splittable valve case 20.
【００１７】リードバルブ装置１５のリードバルブ２２
は図１に示すようにシリンダカウル４の壁面にリードバ
ルブ撓み作動方向が直角方向に配置されている。リード
バルブ装置１５は２分割可能な弁ケース２０のシリンダ
カウル４側ケース２０ａ自体の内壁面が弁ガイド部２０
ａとして形成され、この弁ガイド部２０ａにより独立し
たバルブストッパが不要となる。The reed valve 22 of the reed valve device 15
As shown in FIG. 1, the reed valve bending operation direction is arranged on the wall surface of the cylinder cowl 4 at right angles. In the reed valve device 15, the inner wall surface of the cylinder cowl 4 side case 20 a of the valve case 20, which can be divided into two, has a valve guide portion 20.
The valve guide 20a eliminates the need for an independent valve stopper.
【００１８】リードバルブ２２は弁ケース２０に形成さ
れた弁ガイド部２０ａにより開閉がガイドされる一方、
リードバルブ２２の一端は弁体２１の弁座に固定され、
その他端は自由端となっている。上記弁ケース２０に２
次空気供給用ユニオン２３および取出用ユニオン２４が
貫通して取り付けられる。取出用ユニオン２４はリード
バルブ２２の自由端側のほぼ延長線側の弁ケース２０の
位置に形成された開口に設けられ、この取出用ユニオン
２４にゴムホース等の可撓性連結管２６が取り付けられ
る。The reed valve 22 is guided by a valve guide portion 20a formed on the valve case 20 to open and close.
One end of the reed valve 22 is fixed to a valve seat of the valve body 21,
The other end is a free end. 2 in the valve case 20
The union 23 for the next air supply and the union 24 for taking out are attached through. The union 24 is provided at an opening formed at a position of the valve case 20 substantially on the extension line side of the free end of the reed valve 22, and a flexible connecting pipe 26 such as a rubber hose is attached to the union 24. .
【００１９】この可撓性連結管２６はエアーロスが少な
い最短距離で金属製取付管１１に接続される。金属製取
付管１１はシリンダカウル４を貫通してシリンダカウル
４およびシリンダ２内に入り、その先端部がシリンダ２
の２次空気供給孔１８にねじ結合されて、取り付けられ
る。金属製取付管１１はシリンダカウル４内の冷却通路
を通ってシリンダ２に取付けられる。The flexible connecting pipe 26 is connected to the metal mounting pipe 11 at the shortest distance with a small air loss. The metal mounting tube 11 penetrates through the cylinder cowl 4 and enters the cylinder cowl 4 and the cylinder 2, and the distal end thereof is
Is screwed and attached to the secondary air supply hole 18. The metal attachment pipe 11 is attached to the cylinder 2 through a cooling passage in the cylinder cowl 4.
【００２０】このように連結管２７はシリンダ２の排気
ポート３の２次空気供給孔１８とリードバルブ装置１５
の一室（吐出室側）２５とを連通しており、連結管２７
は２次空気供給孔接続側の金属製連結管である金属製取
付管１１と、可撓性連結管２６との少なくとも２部品で
構成される。シリンダカウル４の内側に収納スペースが
形成され、この収納スペースにリードバルブ装置を装着
してもよい。As described above, the connecting pipe 27 is connected to the secondary air supply hole 18 of the exhaust port 3 of the cylinder 2 and the reed valve device 15.
(Discharge chamber side) 25 and a connecting pipe 27
Is composed of at least two parts: a metal attachment pipe 11 which is a metal connection pipe on the side where the secondary air supply hole is connected, and a flexible connection pipe 26. A storage space is formed inside the cylinder cowl 4, and a reed valve device may be mounted in this storage space.
【００２１】また、供給用ユニオン２３は図２に示すよ
うに供給管２８によりエアクリーナ２９に接続されてい
る。供給用ユニオン２３と取出用ユニオン２４は図１に
示すようにリードバルブ装置１５の一側面と直角方向に
異なる他側面にそれぞれ設けられる。また、図２におい
て３０は車体フレーム、３１はフレームカバー、３２は
シート、３３はマフラー、３４はパワーユニットをそれ
ぞれ示す。このパワーユニット３４にリードバルブ装置
１５を装着してもよく、リードバルブ装置１５の装着は
他にも種々考えられる。The supply union 23 is connected to an air cleaner 29 by a supply pipe 28 as shown in FIG. As shown in FIG. 1, the supply union 23 and the union 24 are provided on the other side different from the one side of the reed valve device 15 at right angles to the side. 2, reference numeral 30 denotes a vehicle body frame, 31 denotes a frame cover, 32 denotes a seat, 33 denotes a muffler, and 34 denotes a power unit. The reed valve device 15 may be mounted on the power unit 34, and the reed valve device 15 may be mounted in various other ways.
【００２２】金属製取付管１１のシリンダ２への取付
は、図１に示すねじ込みによる他、圧入であってもよ
い。圧入の場合にはシリンダカウル４を取り付ける前に
シリンダ２へ取付管１１を圧入することになるので、図
３のようにシリンダカウル４の排風口８を利用し、かつ
孔１３を切孔１３ａとし、取付管１１に嵌め込むように
することができる。そして排風口８を利用すれば切欠が
短かくて済む。The attachment of the metal attachment tube 11 to the cylinder 2 may be carried out by press-fitting instead of the screwing shown in FIG. In the case of press-fitting, the mounting pipe 11 is press-fitted into the cylinder 2 before mounting the cylinder cowl 4, so that the exhaust port 8 of the cylinder cowl 4 is used as shown in FIG. , Can be fitted into the mounting tube 11. If the air outlet 8 is used, the notch can be short.
【００２３】この強制空冷エンジン１の２次空気供給装
置は、シリンダ２の排気ポート３の２次空気供給孔１８
とリードバルブ装置１５とを連結管２７で接続したり、
また２次空気供給孔１８にシリンダカウル４を貫通する
金属製連結管１１を取り付け、この金属製連結管１１と
シリンダカウル４に設けたリードバルブ装置１５とをゴ
ムホース等の可撓性連結管２６で接続するようにしたの
で、連結管２７の連結が簡便にできると共に短かくて済
み、これによりエアーロスを減じ、リードバルブ装置１
５の性能の向上、低コストの配管が可能となる。The secondary air supply device of the forced air-cooled engine 1 has a secondary air supply hole 18 in the exhaust port 3 of the cylinder 2.
And the reed valve device 15 by a connecting pipe 27,
A metal connecting pipe 11 penetrating the cylinder cowl 4 is attached to the secondary air supply hole 18. The metal connecting pipe 11 and the reed valve device 15 provided on the cylinder cowl 4 are connected to a flexible connecting pipe 26 such as a rubber hose. Connection, the connection of the connection pipe 27 can be simplified and shortened, thereby reducing air loss and reducing the reed valve device 1
5 improves the performance and enables low-cost piping.
【００２４】また、金属製連結管１１を排気ポート３の
２次空気供給孔１８に取り付けるので、この連結管１１
の温度が低くなり、かつ冷却風通路を金属製連結管１１
が通るので冷却されることもあり、高温化を防ぐことが
できる。したがって可撓性連結管２６にゴムホースを用
いてもよく、配管の自由度を向上させる一方、耐熱上、
耐久性の点で有利となる。Further, since the metal connecting pipe 11 is attached to the secondary air supply hole 18 of the exhaust port 3, this connecting pipe 11
And the cooling air passage is connected to the metallic connecting pipe 11.
Is passed through, so that it may be cooled, thereby preventing a high temperature. Therefore, a rubber hose may be used for the flexible connection pipe 26, and while the flexibility of the pipe is improved, the heat resistance,
This is advantageous in terms of durability.
【００２５】この強制空冷エンジン１の２次空気供給装
置は、リードバルブ装置１５の一室（吐出室側）に連結
された連結管２６の他端を金属製連結管１１に連結さ
せ、この金属製連結管１１を取付管としてシリンダカウ
ルを貫通してエンジン排気ポートの周壁に開口した２次
空気供給孔に連結させたので、リードバルブ装置１５か
ら２次空気供給が可能となって低コスト配管を行なうこ
とができ、また、シリンダカウル４にリードバルブ装置
１５を設けることで、リードバルブ２２の性能向上を図
ることができる。The secondary air supply device of the forced air-cooled engine 1 has the other end of the connecting pipe 26 connected to one chamber (discharge chamber side) of the reed valve device 15 connected to the metal connecting pipe 11. Since the connection pipe 11 is used as an attachment pipe and penetrates the cylinder cowl and is connected to the secondary air supply hole opened in the peripheral wall of the engine exhaust port, secondary air can be supplied from the reed valve device 15 and low-cost piping is achieved. In addition, by providing the reed valve device 15 on the cylinder cowl 4, the performance of the reed valve 22 can be improved.
【００２６】さらに、強制空冷エンジン１の２次空気供
給装置は、リードバルブ装置１５をエンジン排気ポート
３周壁に開口した２次空気供給孔１８に接続させる連結
管２７を２次空気供給孔接続側金属製連結管１１とリー
ドバルブ装置接続側可撓性連結管２６との２部品で構成
し、金属製連結管１１の外端がシリンダカウル４の外部
に突出しているので、この金属製連結管１１とリードバ
ルブ２２の吐出室側とをゴムホース等の可撓性連結管２
６で接続することにより排気ポート３に２次空気を最短
距離で供給することができる。Further, in the secondary air supply device of the forced air cooling engine 1, the connecting pipe 27 for connecting the reed valve device 15 to the secondary air supply hole 18 opened in the peripheral wall of the engine exhaust port 3 is connected to the secondary air supply hole connection side. The metal connecting pipe 11 is composed of two parts, the metal connecting pipe 11 and the reed valve device connection side flexible connecting pipe 26. Since the outer end of the metal connecting pipe 11 projects outside the cylinder cowl 4, the metal connecting pipe 11 11 and the discharge chamber side of the reed valve 22 are connected to a flexible connecting pipe 2 such as a rubber hose.
6, the secondary air can be supplied to the exhaust port 3 in the shortest distance.
【００２７】また、強制空冷エンジン１の２次空気供給
装置は、シリンダカウルに４一体に取り付けられるリー
ドバルブ装置１５のリードバルブ２２撓み方向が、シリ
ンダカウル壁面に直角方向に配設されているので、弁ガ
イド（バルブストッパ）を独立部品で設ける必要がな
く、弁ケース２０のシリンダカウル４側を弁ガイド部２
０ａとして活用でき、リードバルブ装置１５の部品点数
の削減が図れる。In the secondary air supply device of the forced air-cooled engine 1, the reed valve 22 of the reed valve device 15 attached to the cylinder cowl 4 is arranged so that the bending direction of the reed valve 22 is perpendicular to the wall surface of the cylinder cowl. It is not necessary to provide a valve guide (valve stopper) as an independent component, and the cylinder cowl 4 side of the valve case 20 is connected to the valve guide portion 2.
0a, and the number of parts of the reed valve device 15 can be reduced.
【００２８】したがって、２次空気はエアクリーナ２９
から供給管２８を通ってリードバルブ装置１５内に導か
れ、リードバルブ２２を開いて連結管２６を通り取付管
１１から排気ポート３へ円滑かつスムーズに送られる。
この連結管２６は前述のように短かくできるのでエアロ
スが少なく、効率よく能率的に２次空気の供給ができ、
排気ガスの浄化に役立つ。Therefore, the secondary air is supplied to the air cleaner 29.
From the supply pipe 28 into the reed valve device 15, the reed valve 22 is opened, and the fluid is smoothly and smoothly sent from the mounting pipe 11 to the exhaust port 3 through the connecting pipe 26.
Since the connecting pipe 26 can be shortened as described above, the air loss is small, and the secondary air can be efficiently and efficiently supplied.
Useful for exhaust gas purification.
【００２９】[0029]
【発明の効果】この発明に係る強制空冷エンジンの２次
空気供給装置によれば、リードバルブ装置のリードバル
ブの配設と取出用ユニオンの取出位置に特徴を持たせた
ので、リードバルブ装置に送り込まれる２次空気を取出
用ユニオンから円滑かつスムーズに能率よく供給するこ
とができ、排気ガス等の浄化を有効的に効率よく行なう
ことができる。According to the secondary air supply device for a forced air cooling engine according to the present invention, the arrangement of the reed valve of the reed valve device and the extraction position of the union for unloading are characterized. The supplied secondary air can be supplied smoothly and efficiently from the union for extraction, and the purification of exhaust gas and the like can be performed effectively and efficiently.
【００３０】また、この強制空冷エンジンの２次空気供
給装置は、リードバルブの配設に特徴を持たせ、リード
バルブ装置の弁ケース壁面をリードバルブの弁ガイド部
として積極的に活用でき、リードバルブのバルブストッ
パの独立部品として設置する必要がないので、リードバ
ルブ装置の部品点数の削減を図り、コストを低減させる
とともに、２次空気供給用の金属製配管をシリンダのエ
ンジン排気ポートに望ませて強制空冷ファンと反対側位
置で固定させたので、シリンダ内に複雑な２次空気供給
用流路を穿設する必要がなく、金属製配管の取付、配管
自由度を向上させることができ、耐熱性や耐久性に優れ
たものとすることができる。Further, the secondary air supply device of this forced air cooling engine has a feature in the arrangement of the reed valve, and the wall of the valve case of the reed valve device can be positively utilized as a valve guide portion of the reed valve. Since it is not necessary to install the valve stopper as an independent part of the valve, the number of parts of the reed valve device can be reduced, the cost can be reduced, and a metal pipe for secondary air supply is desired at the engine exhaust port of the cylinder. Fixed at the position opposite to the forced air cooling fan, so there is no need to drill a complicated secondary air supply flow passage in the cylinder, and the mounting of metal piping and the flexibility of piping can be improved. It can be excellent in heat resistance and durability.
【００３１】さらに、この強制空冷エンジンの２次空気
供給装置は、シリンダカウル上部にリードバルブ装置を
着脱自在に装着したので、取付自由度を向上させてリー
ドバルブ装置の着脱が容易となり、取付作業性やメンテ
ナンス性を向上させることができる。Further, in the secondary air supply device of this forced air cooling engine, the reed valve device is removably mounted on the upper part of the cylinder cowl, so that the degree of freedom of mounting is improved and the reed valve device can be easily attached and detached. Performance and maintainability can be improved.
【図１】この発明に係る強制空冷エンジンの２次空気供
給装置の一実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of a secondary air supply device for a forced air-cooled engine according to the present invention.
【図２】この発明をスクータタイプの２輪車に実装した
場合の状態を示す側面図。FIG. 2 is a side view showing a state where the present invention is mounted on a scooter type motorcycle.
【図３】この発明に係る強制空冷エンジンの２次空気供
給装置の他の実施例を示す断面図。FIG. 3 is a sectional view showing another embodiment of the secondary air supply device of the forced air cooling engine according to the present invention.
１ エンジン ２ シリンダ ３ 排気ポート ４ シリンダカウル（カウリング） ５ ファンケース ６ ファン ７ 冷却風入口 ８ 冷却風排風口 １１ 金属取付管（金属製連結管，ユニオン） １５ リードバルブ装置 １７ 収納スペース １８ ２次空気供給孔 ２０ 弁ケース ２２ リードバルブ ２３，２４ ユニオン ２６ 可撓性連結管（ゴムホース） ２７ 連結管 ２８ 供給管 DESCRIPTION OF SYMBOLS 1 Engine 2 Cylinder 3 Exhaust port 4 Cylinder cowl (Cowling) 5 Fan case 6 Fan 7 Cooling air inlet 8 Cooling air exhaust port 11 Metal mounting pipe (Metal connecting pipe, union) 15 Reed valve device 17 Storage space 18 Secondary air Supply hole 20 Valve case 22 Reed valve 23, 24 Union 26 Flexible connection pipe (rubber hose) 27 Connection pipe 28 Supply pipe
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference)
Claims (4)
ダ一側の強制空冷ファンからの冷却風をシリンダに圧送
しシリンダ他側の排風口から排出する二輪車用強制空冷
エンジンにおいて、２次空気供給用リードバルブ装置を
前記シリンダカウルにこのシリンダカウルと一体の取付
座に固着手段によって着脱自在に固着し、上記リードバ
ルブ装置内のリードバルブをその撓み作動方向を前記シ
リンダカウルの壁面に対し直角方向となるように配設
し、前記リードバルブ装置の取出用ユニオンはリードバ
ルブの自由端側のほぼ延長線側に開口したことを特徴と
する強制空冷エンジンの２次空気供給装置。1. A reed valve for supplying secondary air in a forced air cooling engine for a motorcycle in which a cylinder is covered with a cylinder cowl and cooling air from a forced air cooling fan on one side of the cylinder is pressure-fed to the cylinder and discharged from an exhaust port on the other side of the cylinder. The device is removably fixed to the cylinder cowl by a fixing means on a mounting seat integral with the cylinder cowl, and the reed valve in the reed valve device is bent so that its operating direction is perpendicular to the wall surface of the cylinder cowl. And a take-out union of the reed valve device is opened substantially on an extension side of a free end of the reed valve.
ダ一側の強制空冷ファンからの冷却風をシリンダに圧送
しシリンダ他側の排風口から排出する二輪車用強制空冷
エンジンにおいて、２次空気供給用リードバルブ装置を
前記シリンダカウルにこのシリンダカウルと一体の取付
座に固着手段によって着脱自在に固着し、上記リードバ
ルブ装置内のリードバルブをその撓み作動方向を前記シ
リンダカウルの壁面に対し直角方向となるように配設し
て弁ケースの壁面に弁ガイド部を構成し、前記リードバ
ルブ装置の一側面と直角方向の他側面に供給用ユニオン
と取出用ユニオンをそれぞれ設け、この取出用ユニオン
に連結管を介して金属製連結管が連結され、この金属製
連結管は前記強制空冷ファンと反対側のエンジン排気ポ
ートの周壁に固定し、排気ポートに開口させたことを特
徴とする強制空冷エンジンの２次空気供給装置。2. A reed valve for supplying secondary air in a forced air cooling engine for a motorcycle in which a cylinder is covered with a cylinder cowl and cooling air from a forced air cooling fan on one side of the cylinder is pressure-fed to the cylinder and discharged from an exhaust port on the other side of the cylinder. The device is removably fixed to the cylinder cowl by a fixing means on a mounting seat integral with the cylinder cowl, and the reed valve in the reed valve device is bent so that its operating direction is perpendicular to the wall surface of the cylinder cowl. To form a valve guide on the wall surface of the valve case, a supply union and an union for unloading are provided respectively on one side of the reed valve device and the other side in a direction perpendicular to the one side, and a connecting pipe is connected to the union for union. A metal connecting pipe is connected to the metal exhaust pipe via a pipe, and the metal connecting pipe is fixed to a peripheral wall of an engine exhaust port opposite to the forced air cooling fan. And a secondary air supply device for a forced air cooling engine, wherein the secondary air supply device is opened to an exhaust port.
ダ一側の強制空冷ファンからの冷却風をシリンダに圧送
しシリンダ他側の排風口から排出する二輪車用強制空冷
エンジンにおいて、２次空気供給用リードバルブ装置を
前記シリンダカウルにこのシリンダカウルと一体の取付
座に固着手段によって着脱自在に固着し、上記リードバ
ルブ装置の下流側を金属製連結管を介してエンジン排気
ポートに連通させ、上記金属製連結管はシリンダ側部の
冷却風排風口の近傍位置で、しかも前記強制空冷ファン
と反対側の排気ポート周壁に固定し、排気ポートに開口
させたことを特徴とする強制空冷エンジンの２次空気供
給装置。3. A reed valve for supplying secondary air in a forced air cooling engine for a motorcycle in which a cylinder is covered with a cylinder cowl and cooling air from a forced air cooling fan on one side of the cylinder is pressure-fed to the cylinder and discharged from an exhaust port on the other side of the cylinder. The device is removably fixed to the cylinder cowl by a fixing means on a mounting seat integral with the cylinder cowl, and the downstream side of the reed valve device is communicated with an engine exhaust port via a metal connection pipe, thereby connecting the metal connection. The pipe is fixed to a peripheral wall of an exhaust port opposite to the forced air cooling fan at a position near a cooling air exhaust port on a side of the cylinder, and is opened to an exhaust port. apparatus.
ダ一側の強制空冷ファンからの冷却風をシリンダに圧送
しシリンダ他側の排風口から排出する二輪車用強制空冷
エンジンにおいて、２次空気供給用リードバルブ装置を
前記シリンダカウルにこのシリンダカウルと一体の取付
座に固着手段によって着脱自在に固着し、上記リードバ
ルブ装置は略水平型エンジンのシリンダカウルの上部に
装着し、上記エンジンの下部にエンジン排気ポートを形
成し、その排気ポートに開口するように側方から金属製
連結管を取り付け、略水平型エンジンの一側方に前記冷
却ファンを装着したことを特徴とする強制空冷エンジン
の２次空気供給装置。4. A reed valve for supplying secondary air in a forced air cooling engine for a motorcycle in which a cylinder is covered with a cylinder cowl and cooling air from a forced air cooling fan on one side of the cylinder is pressure-fed to the cylinder and discharged from an exhaust port on the other side of the cylinder. The device is removably fixed to the cylinder cowl by a fixing means on a mounting seat integral with the cylinder cowl. The reed valve device is mounted on an upper portion of a cylinder cowl of a substantially horizontal engine, and an engine exhaust port is provided on a lower portion of the engine. Wherein a metallic connecting pipe is attached from the side so as to open to an exhaust port thereof, and the cooling fan is attached to one side of a substantially horizontal engine. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000376504A JP3348722B2 (en) | 2000-12-11 | 2000-12-11 | Secondary air supply device for forced air cooling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000376504A JP3348722B2 (en) | 2000-12-11 | 2000-12-11 | Secondary air supply device for forced air cooling engine |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33348591A Division JP3158574B2 (en) | 1991-12-17 | 1991-12-17 | Secondary air supply device for forced air cooling engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001159312A true JP2001159312A (en) | 2001-06-12 |
| JP3348722B2 JP3348722B2 (en) | 2002-11-20 |
Family
ID=18845352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000376504A Expired - Fee Related JP3348722B2 (en) | 2000-12-11 | 2000-12-11 | Secondary air supply device for forced air cooling engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3348722B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006226262A (en) * | 2005-02-21 | 2006-08-31 | Honda Motor Co Ltd | Exhaust secondary air introduction structure of motorcycle |
-
2000
- 2000-12-11 JP JP2000376504A patent/JP3348722B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006226262A (en) * | 2005-02-21 | 2006-08-31 | Honda Motor Co Ltd | Exhaust secondary air introduction structure of motorcycle |
| JP4545013B2 (en) * | 2005-02-21 | 2010-09-15 | 本田技研工業株式会社 | Exhaust secondary air introduction structure for motorcycles |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3348722B2 (en) | 2002-11-20 |
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