JPH03286138A - Lead valve device for two-cycle engine - Google Patents
Lead valve device for two-cycle engineInfo
- Publication number
- JPH03286138A JPH03286138A JP8601690A JP8601690A JPH03286138A JP H03286138 A JPH03286138 A JP H03286138A JP 8601690 A JP8601690 A JP 8601690A JP 8601690 A JP8601690 A JP 8601690A JP H03286138 A JPH03286138 A JP H03286138A
- Authority
- JP
- Japan
- Prior art keywords
- stopper
- valve
- valve seat
- valves
- portions
- 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
- 235000014676 Phragmites communis Nutrition 0.000 claims description 34
- 238000009423 ventilation Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Landscapes
- Check Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
この発明はダブル構造を有する２サイクルエンジンのリ
ードバルブ装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to a reed valve device for a two-stroke engine having a double structure.
（従来の技術）
２サイクルエンジンのリードバルブの中でダブル構造（
ダブルリードバルブ方式）のリードバルブ装置は、従来
第６図に断面を示すようにインテークパイプ１にＶ字状
断面を有する一対のバルブシート２．２が並設され、各
シート部２ａ、２ｂ・・・にリードバルブ３．３・・・
の根元部かビス４゜４・・・によりそれぞれ取付けられ
ている。(Prior technology) A double structure (
Conventionally, in a reed valve device (double reed valve type), a pair of valve seats 2.2 having a V-shaped cross section are arranged side by side in an intake pipe 1, as shown in cross section in FIG. ...Reed valve 3.3...
They are attached at the base of each with screws 4゜4....
（発明が解決しようとする課題）
このような構造のリードバルブ装置では、中央の向き合
う２つのリードバルブ３，３・・・を取付けるためのシ
ート部２ａ、２ａ・のストッパ５゜５が干渉するため、
インテーパイブ１側に向く端面６の幅寸法Ａとして必然
的に所定寸法が必要となり、そのため矢印方向に流れる
空気流の抵抗面となって通気抵抗が増し、特に高回転時
の大流量域での出力低下を招くという問題点があった。(Problem to be Solved by the Invention) In the reed valve device having such a structure, the stoppers 5° 5 of the seat portions 2a, 2a, for attaching the two center facing reed valves 3, 3... interfere with each other. For,
A certain width dimension A of the end face 6 facing the intake pipe 1 side is inevitably required, and as a result, it becomes a resistance surface for the airflow flowing in the direction of the arrow, increasing ventilation resistance, especially in the large flow range at high rotation speeds. There was a problem in that it caused a decline.
この発明は上記の点に鑑み、ダブル構造のリドバルブの
バルブシートの中央部の端面の幅寸法を小さくすること
ができ、かつリードバルブの取付けを容易とした２サイ
クルエンジンのリードバルブ装置を提供するものである
。In view of the above points, the present invention provides a reed valve device for a two-stroke engine in which the width dimension of the end face of the central part of the valve seat of a double structure reed valve can be reduced and the reed valve can be easily installed. It is something.
（課題を解決するための手段）
上記従来技術が有する問題点を解決するための手段とし
てこの発明では、ダブル構造のリードバルブを有する２
サイクルエンジンにおいて、断面Ｖ字状に折曲形成した
ストッパ部の両端にバルブシートの側面にビス止めする
ための取付面を有するバルブストッパを設け、このバル
ブストッパのストッパ部をバルブシートの中央のＶ字状
に向き合う部分にリードバルブの基部を介在して挿入し
、前記取付面をバルブシートの側面にビスにより取付け
たものである。(Means for Solving the Problems) As a means for solving the problems of the above-mentioned prior art, the present invention provides two reed valves having a double structure.
In a cycle engine, a valve stopper is provided at both ends of a stopper part bent into a V-shaped cross section, and has mounting surfaces for screwing to the side surface of the valve seat. The base of the reed valve is inserted into the portions facing each other in the shape of a letter, and the mounting surface is attached to the side surface of the valve seat with screws.
（作用）
バルブシートのＶ字状をなして向き合う中央部の部分に
バルブストッパのＶ字状断面を有するストッパ部を挿入
し、このストッパ部でリードバルブの基部をバルブシー
トに固定すると共にり一ドバルブのストッパとなるので
、前記中央部分のインテークパイプ側に向く端面の幅寸
法が小さくでき、吸気の通気抵抗が大幅に減少し、エン
ジン出力の向上が図られる。(Function) A stopper portion of the valve stopper having a V-shaped cross section is inserted into the V-shaped central portions of the valve seat that face each other, and this stopper portion fixes the base of the reed valve to the valve seat and prevents the valve from becoming fixed. Since this serves as a stopper for the intake valve, the width of the end face of the central portion facing the intake pipe can be reduced, greatly reducing intake ventilation resistance and improving engine output.
（実施例） 以下この発明の実施例を図面について説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図はこの発明を実施した２サイクルエンジンの断面
を示すもので、シリンダ７に連設されたクランクケース
８にインテークパイプ９が接続され、この接続部にダブ
ル構造のリードバルブ装置１０が設けられる。図中符号
１１はシリンダヘッド、１２はキャブレタ、１３はピス
トンである。FIG. 1 shows a cross section of a two-stroke engine embodying the present invention, in which an intake pipe 9 is connected to a crankcase 8 connected to a cylinder 7, and a double-structured reed valve device 10 is installed at this connection. It will be done. In the figure, reference numeral 11 is a cylinder head, 12 is a carburetor, and 13 is a piston.
この発明に係るリードバルブ装置１０は、バルブシート
１４のＶ字状に向き合う部分にバルブストッパ１５が挿
入固定される。このバルブストッパ１５は、第２図、第
３図に示すようにバルブシート１４のＶ字状をなして向
き合う部分に挿入されるよう断面Ｖ字状に折曲形成され
バルブシート１４の幅方向長さに対応する長さを有する
ストッパ部１６と、このストッパ部１６の両端に一体的
に設けられバルブシート１４の側面に取付けるための取
付面１７．１７とで構成されており、この取付面１７．
１７にはビス１８．１８・・・を通すための取付孔１９
．１９が穿設されている。またストッパ部１６の各面部
２０．２０の外面にはリードバルブ２１．２１の基部の
孔２２．２２・・・が嵌合する短い突部２３．２３・・
・がリードバルブ２１゜２１の孔２２．２２・・・に合
致する位置に突設されている。In the reed valve device 10 according to the present invention, a valve stopper 15 is inserted and fixed into the V-shaped opposing portions of the valve seat 14. As shown in FIGS. 2 and 3, the valve stopper 15 is bent to have a V-shaped cross section so as to be inserted into the V-shaped portions of the valve seat 14 facing each other. It consists of a stopper part 16 having a length corresponding to the length of the stopper part 16, and mounting surfaces 17. ．．
17 has a mounting hole 19 for passing screws 18, 18...
．． 19 are drilled. Further, on the outer surface of each surface portion 20.20 of the stopper portion 16, short protrusions 23.23 are fitted into holes 22.22 at the base of the reed valve 21.21.
* are provided protrudingly at positions that match the holes 22, 22, . . . of the reed valves 21, 21.
したがってストッパ部１６の突部２３．２３・・・にリ
ードバルブ２１．２１の基部の孔２２．２２・・・を嵌
め込み、バルブシート１４のＶ字状部分にリードバルブ
２１．２１ごと挿入してその取付面１７．１７をバルブ
シート１４の側面にビス１８゜１８・・・により取付け
れば、第５図示のようなリードバルブ２１．２１はバル
ブシート１４に取付けられる。外側のリードバルブは通
常のようにして個別にビス止めにより取付けられる。Therefore, the holes 22, 22 at the base of the reed valves 21, 21 are fitted into the protrusions 23, 23, . By attaching the mounting surface 17.17 to the side surface of the valve seat 14 with screws 18.18, the reed valve 21.21 as shown in FIG. 5 is attached to the valve seat 14. The outer reed valve is attached individually with screws in the usual manner.
これによりバルブシート１４のインテークパイプ９側に
向く端面の幅寸法Ｂを可能な限り小さくしても、リード
バルブ２１．２１を取付けることができ、かつリードバ
ルブ２１．２１の開動時にはストッパ部１６の面部２０
．２０がストッパとしての機能を持ち、過剰な動きが防
止される。As a result, even if the width dimension B of the end face of the valve seat 14 facing the intake pipe 9 side is made as small as possible, the reed valve 21.21 can be installed, and when the reed valve 21.21 is opened, the stopper part 16 is closed. Surface part 20
．． 20 functions as a stopper to prevent excessive movement.
以上のようにこの発明によれば、バルブシートの中央の
インテークパイプ側に向く端面の幅を可能な限り小さく
することができるので、吸気時の通気抵抗が小さくなり
、高回転時に大流量の空気を流すことができることは勿
論、全ての回転域におけるエンジンの出力を高めること
ができる。As described above, according to this invention, the width of the end face facing the intake pipe at the center of the valve seat can be made as small as possible, so the ventilation resistance during intake is reduced, and a large flow of air is produced at high rotation speeds. It is possible to increase the output of the engine in all rotation ranges.
またストッパ部を挿入するだけで互いに向き合うリード
バルブを取付けることができるので、取付けにくい内側
のリードバルブの取付けが簡単にでき、図示実施例のよ
うに突起と孔との嵌合でリードバルブを取付けることが
できるので、リードバルブ取付用のビスを不要とするこ
とができ、−層その取付けを容易とすることができる。In addition, since reed valves facing each other can be installed simply by inserting the stopper parts, it is possible to easily install reed valves on the inside that are difficult to install, and the reed valves can be installed by fitting the protrusion and hole as in the illustrated embodiment. Therefore, screws for attaching the reed valve can be made unnecessary, and the attachment of the reed valve can be made easy.
第１図はこの発明を実施した２サイクルエンジンの断面
図、第２図はこの発明によるリードバルブ装置の要部の
分解斜視図、第３図はこの発明のリードバルブ装置に組
み込まれるバルブストッパの一部を切断した斜視図、第
４図はバルブシートの正面側から見た斜視図、第５図は
バルブストッパを取付けた状態の断面図、第６図は従来
技術を示す断面図である。
１．９・・・インテークパイプ、２．１４・・・バルブ
シート、３，２１・・・リードバルブ、７・・・シリン
ダ、８・・・クランクケース、１０・・・リードバルブ
装置、１５・・・バルブストッパ、１６・・・ストッパ
部、１７・・・取付面、２３・・・突部。FIG. 1 is a cross-sectional view of a two-stroke engine embodying the present invention, FIG. 2 is an exploded perspective view of the main parts of the reed valve device according to the present invention, and FIG. 3 is a valve stopper incorporated in the reed valve device according to the present invention. FIG. 4 is a perspective view with a portion cut away, FIG. 4 is a perspective view of the valve seat seen from the front side, FIG. 5 is a sectional view with a valve stopper attached, and FIG. 6 is a sectional view showing the prior art. 1.9... Intake pipe, 2.14... Valve seat, 3, 21... Reed valve, 7... Cylinder, 8... Crank case, 10... Reed valve device, 15... ...Valve stopper, 16...Stopper part, 17...Mounting surface, 23...Protrusion.
Claims (1)
において、断面Ｖ字状に折曲形成したストッパ部の両端
にバルブシートの側面にビス止めするための取付面を有
するバルブストッパを設け、このバルブストッパのスト
ッパ部をバルブシートの中央のＶ字状に向き合う部分に
リードバルブの基部を介在して挿入し、前記取付面をバ
ルブシートの側面にビスにより取付けたことを特徴とす
る２サイクルエンジンのリードバルブ装置。In a two-stroke engine having a double-structured reed valve, a valve stopper is provided at both ends of a stopper portion bent to have a V-shaped cross section, and has mounting surfaces for screwing to the side surface of the valve seat. A reed valve device for a two-stroke engine, characterized in that the reed valve is inserted into a central V-shaped portion of the valve seat facing each other with the base of the reed valve interposed therebetween, and the mounting surface is attached to the side surface of the valve seat with screws. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2086016A JP2764758B2 (en) | 1990-03-31 | 1990-03-31 | Reed valve device for two-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2086016A JP2764758B2 (en) | 1990-03-31 | 1990-03-31 | Reed valve device for two-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03286138A true JPH03286138A (en) | 1991-12-17 |
| JP2764758B2 JP2764758B2 (en) | 1998-06-11 |
Family
ID=13874877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2086016A Expired - Lifetime JP2764758B2 (en) | 1990-03-31 | 1990-03-31 | Reed valve device for two-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2764758B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823150A (en) * | 1991-12-27 | 1998-10-20 | Yamaha Hatsudoki Kabushiki Kaisha | Induction system for two cycle engine |
-
1990
- 1990-03-31 JP JP2086016A patent/JP2764758B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823150A (en) * | 1991-12-27 | 1998-10-20 | Yamaha Hatsudoki Kabushiki Kaisha | Induction system for two cycle engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2764758B2 (en) | 1998-06-11 |
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