JPH032706Y2 - - Google Patents
Info
- Publication number
- JPH032706Y2 JPH032706Y2 JP1985085004U JP8500485U JPH032706Y2 JP H032706 Y2 JPH032706 Y2 JP H032706Y2 JP 1985085004 U JP1985085004 U JP 1985085004U JP 8500485 U JP8500485 U JP 8500485U JP H032706 Y2 JPH032706 Y2 JP H032706Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- hole
- piston
- decompression chamber
- engine
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000006837 decompression Effects 0.000 description 13
- 238000005192 partition Methods 0.000 description 7
- 239000007858 starting material Substances 0.000 description 7
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
Landscapes
- Exhaust Silencers (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、エンジンを軽く起動できるようにし
たエンジンにおける起動時の減圧装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pressure reducing device for starting an engine, which allows the engine to be started easily.
従来には、エンジン起動時の負担を軽くするこ
とができるようにしたものが実開昭58−1744号公
報に見られるが、この構成では、減圧室をシリン
ダ自体に形成しなければならず、製作が困難であ
るばかりか、減圧室を広くすることはシリンダが
大形となり、狭くすると減圧効果が低下するとい
つた問題点を有している。
Conventionally, a system that was able to reduce the burden on starting the engine was found in Japanese Utility Model Application Publication No. 58-1744, but with this configuration, the decompression chamber had to be formed in the cylinder itself. Not only is it difficult to manufacture, but widening the decompression chamber results in a large cylinder, while making it narrow reduces the depressurizing effect.
本考案は、その問題点を解決したものであり、
減圧室をマフラーに一体的に形成して、製作がき
わめて容易となり、しかも減圧室を適応する大き
さに良好に形成することができ、エンジンを確実
に軽く起動することができて好適に実施できるよ
う提供するものである。
This invention solves that problem,
By forming the decompression chamber integrally with the muffler, manufacturing is extremely easy, and the decompression chamber can be well formed to an appropriate size, and the engine can be reliably and easily started, making it suitable for implementation. This is what we offer.
そのため、本考案では、排気ポートとシリンダ
内上端との間となるシリンダ内周面に開口する小
径の透孔をシリンダ外周側に延出するよう形成
し、前記排気ポートに連通するマフラーの一部に
は前記透孔の外端に連通する減圧室を区劃形成し
て構成したものである。
Therefore, in the present invention, a small diameter through hole is formed in the inner peripheral surface of the cylinder between the exhaust port and the upper end of the cylinder so as to extend toward the outer peripheral side of the cylinder, and a part of the muffler that communicates with the exhaust port is formed. In this case, a decompression chamber communicating with the outer end of the through hole is defined.
したがつて、起動時に、手動スタータによりピ
ストンを駆動してピストンが上死点側へ圧縮工程
に入る状態で、ガスの一部が小孔よりマフラー側
の減圧室に流出することになつて減圧されること
になり、そのためにスタータによるピストン駆動
力が軽くなつて手動操作を軽く行なうことができ
ることになる。
Therefore, at startup, when the piston is driven by the manual starter and the piston enters the compression process toward the top dead center side, a portion of the gas flows out from the small hole into the decompression chamber on the muffler side, causing depressurization. Therefore, the piston driving force by the starter becomes lighter, and manual operation can be performed easily.
次に、図面に示す実施例について説明する。 Next, the embodiment shown in the drawings will be described.
Ａはガソリンエンジンのシリンダで、上端側に
点火栓３を連設した該シリンダＡの内周面には排
気ポート１や吸気ポート（図示省略）を連通連設
するとともに、手動スタータにより駆動できるク
ランク４にピストンロツド５を介して連結したピ
ストン６を嵌装して従来形構造同様に構成する
が、排気ポート１とシリンダＡ内上端との間とな
るシリンダＡ内周面に開口する小径の透孔２を、
エンジンの定常運転時にはガスの出入がなくなる
程度の小断面積にしてシリンダＡの外周に延出す
るように形成して構成する。 A is a cylinder of a gasoline engine, and an ignition plug 3 is connected to the upper end of the cylinder A. An exhaust port 1 and an intake port (not shown) are connected to the inner peripheral surface of the cylinder A, and a crank that can be driven by a manual starter is provided. 4 is fitted with a piston 6 connected via a piston rod 5, and is constructed in the same manner as the conventional structure, but a small diameter through hole is provided on the inner circumferential surface of cylinder A between the exhaust port 1 and the upper end of cylinder A. 2,
It is formed so as to extend to the outer periphery of the cylinder A so as to have a small cross-sectional area such that gas does not enter or exit during steady operation of the engine.
Ｂはマフラー全体を示し、下部側にテールパイ
プ７を連設した椀状の外蓋B1と内蓋B2を合着し
て形成し、当板８を内側面に接着した内蓋B2の
外側部を、前記透孔２および排気ポート１の外端
側にパツキン９を介して連設し、該パツキン９か
ら当板８にかけては、排気ポート１に連通するそ
れよりやや大きい排気孔１０と、前記透孔２に連
通するそれよりやや大きい透孔２ａをそれぞれ形
成して構成する。 B shows the entire muffler, and is formed by bonding a bowl-shaped outer cover B1 with a tail pipe 7 connected to the lower side and an inner cover B2 , and an inner cover B2 with a patch plate 8 glued to the inner surface. is connected to the outer end of the through hole 2 and the exhaust port 1 via a packing 9, and from the packing 9 to the plate 8 is an exhaust hole 10 that is slightly larger than the through hole 2 and communicates with the exhaust port 1. and a through hole 2a which is slightly larger than the through hole 2 and communicates with the through hole 2.
前記マフラーＢの内部上方には前記透孔２ａに
連通する減圧室Ｃを区劃形成するが、側断面Ｌ状
となる仕切板１１の上端屈折部１１ａを内蓋B2
の上面に、両側より垂設する連結片１１ｂ，１１
ｂを内蓋B2の両側面にそれぞれスポツト溶接す
るとともに、仕切り板１１の下端縁１１ｃを前記
当板８および内蓋B2の側面に接合して、内蓋B2
の上部内面と仕切り板１１との間に減圧室Ｃを形
成する。 A decompression chamber C communicating with the through hole 2a is defined in the upper part of the inside of the muffler B, and the upper bent portion 11a of the partition plate 11 having an L-shaped side cross section is connected to the inner lid B2.
Connecting pieces 11b, 11 hanging from both sides on the upper surface of
b are spot - welded to both sides of the inner lid B2 , and the lower edge 11c of the partition plate 11 is joined to the contact plate 8 and the side surfaces of the inner lid B2.
A decompression chamber C is formed between the upper inner surface of the partition plate 11 and the partition plate 11.
なお、前記仕切り板１１の端縁と内蓋B2の内
面との間に隙間が生じるが、仕切り板１１の全周
をマフラーＢ内面に密着させて仕切り板１１に小
孔を形成することもでき、また、減圧室Ｃの大き
さによつては、隙間または小孔を設けなくて密着
状に形成してもよい。 Note that although a gap is created between the edge of the partition plate 11 and the inner surface of the inner cover B2 , it is also possible to form a small hole in the partition plate 11 by bringing the entire circumference of the partition plate 11 into close contact with the inner surface of the muffler B. Alternatively, depending on the size of the decompression chamber C, it may be formed in a close-contact manner without providing any gaps or small holes.
したがつて、エンジンを起動する際に、手動ス
タータによりピストン６を駆動してピストン６が
上死点側へ圧縮工程に入る状態で、ピストン６に
より圧縮されるガスの一部が透孔２より透孔２ａ
を通して減圧室Ｃに流出することになり、そのた
めにピストン６が受ける抵抗は軽減されることに
なつて、手動スタータによるピストン駆動力が軽
くなつて手動操作を軽く行なうことができること
になる。 Therefore, when starting the engine, when the piston 6 is driven by the manual starter and the piston 6 enters the compression process toward the top dead center side, a portion of the gas compressed by the piston 6 is released from the through hole 2. Through hole 2a
As a result, the resistance that the piston 6 receives is reduced, and the piston driving force by the manual starter becomes lighter, making manual operation easier.
なお、エンジンの定常運転時には、透孔２は小
径であるから、減圧室ＣとシリンダＡ内との間で
ガスが出入りすることはない状態となる。 Note that during steady operation of the engine, since the through hole 2 has a small diameter, gas does not enter or exit between the decompression chamber C and the cylinder A.
このように本考案は、起動時に手動スタータに
よりピストンを駆動する状態では、ピストンが上
死点側へ圧縮工程に入る状態で圧縮ガスの一部を
透孔２から減圧室Ｃに流出させることができるの
で、手動スタータによるピストン駆動力が軽くな
つて手動操作を楽に軽く行なうことができること
になり、ガス流出側の減圧室ＣはマフラーＢの一
部に適度の大きさにして良好に構成することがで
き、シリンダＡ側は従来同様の大きさのままにし
て、簡単な構造にして容易に製作することがで
き、好適に実施できる特長を有する。
In this manner, the present invention allows a portion of the compressed gas to flow out from the through hole 2 into the decompression chamber C when the piston is in the compression process toward the top dead center when the piston is driven by the manual starter at startup. As a result, the piston driving force by the manual starter is reduced, and manual operation can be performed easily and lightly.The decompression chamber C on the gas outlet side should be appropriately sized and configured as part of the muffler B. It has the advantage that the cylinder A side can be kept the same size as the conventional one, can be easily manufactured with a simple structure, and can be suitably implemented.
第１図は本考案の実施例である要部の断面図、
第２図はその一部の拡大図、第３図は第２図の
−線における一部の断面図を示す。
１……排気ポート、Ａ……シリンダ、２……透
孔、Ｂ……マフラー、Ｃ……減圧室。
FIG. 1 is a cross-sectional view of the main parts of an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion thereof, and FIG. 3 is a sectional view of a portion taken along the line - in FIG. 1...Exhaust port, A...Cylinder, 2...Through hole, B...Muffler, C...Decompression chamber.
Claims (1)
シリンダＡ内周面に開口する小径の透孔２をシリ
ンダＡ外周側に延出するよう形成し、前記排気ポ
ート１に連通するマフラーＢの一部には前記透孔
２の外端に連通する減圧室Ｃを区劃形成して構成
したことを特徴とするエンジンにおける起動時の
減圧装置。 A small diameter through hole 2 is formed in the inner peripheral surface of the cylinder A between the exhaust port 1 and the inner upper end of the cylinder A, and extends toward the outer peripheral side of the cylinder A. A pressure reducing device for starting an engine, characterized in that a pressure reducing chamber C communicating with the outer end of the through hole 2 is formed in the section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985085004U JPH032706Y2 (en) | 1985-06-05 | 1985-06-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985085004U JPH032706Y2 (en) | 1985-06-05 | 1985-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61200467U JPS61200467U (en) | 1986-12-15 |
| JPH032706Y2 true JPH032706Y2 (en) | 1991-01-24 |
Family
ID=30635001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985085004U Expired JPH032706Y2 (en) | 1985-06-05 | 1985-06-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032706Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007198185A (en) * | 2006-01-24 | 2007-08-09 | Kokusan Denki Co Ltd | Engine starter |
-
1985
- 1985-06-05 JP JP1985085004U patent/JPH032706Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61200467U (en) | 1986-12-15 |
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