JPH046536U - - Google Patents
Info
- Publication number
- JPH046536U JPH046536U JP4415890U JP4415890U JPH046536U JP H046536 U JPH046536 U JP H046536U JP 4415890 U JP4415890 U JP 4415890U JP 4415890 U JP4415890 U JP 4415890U JP H046536 U JPH046536 U JP H046536U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- exhaust passage
- main
- sub
- opened
- 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
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Mechanically-Actuated Valves (AREA)
- Valve Device For Special Equipments (AREA)
Description
第１図は本考案を適用した２サイクルエンジン
のメインバルブ全開時の縦断面図（第４図の−
断面図）、第２図は第１図の矢視図、第３図
は第１図の−断面図、第４図は第１図の−
断面図、第５図は第４図の−断面部分図、
第６図は第４図の−断面部分図、第７図はメ
インバルブ閉時の縦断面図、第８図はサブバルブ
閉時の第７図の−断面図、第９図はサブバル
ブ閉時の第５図と同じ部分の断面図、第１０図は
第８図の−断面図、第１１図は別の実施例の
水平断面図、第１２図〜第１４図はそれぞれ従来
例の縦断面図である。１……シリンダ、２……主
排気通路、３……副排気通路、５……メインバル
ブ、６……サブバルブ、１０……ピニオン、１２
……駆動ロツド、１４，１５……第１、第２ラツ
ク歯、２０……アイドルギヤ、２１……バルブ孔
、３０……ラツク歯。
Figure 1 is a vertical cross-sectional view of a two-stroke engine to which the present invention is applied when the main valve is fully open (-
2 is a sectional view of FIG. 1, FIG. 3 is a sectional view of FIG. 1, and FIG. 4 is a sectional view of FIG. 1.
A cross-sectional view, FIG. 5 is a partial cross-sectional view of FIG.
Figure 6 is a cross-sectional partial view of Figure 4, Figure 7 is a longitudinal cross-sectional view when the main valve is closed, Figure 8 is a cross-sectional view of Figure 7 when the sub-valve is closed, and Figure 9 is a cross-sectional view of Figure 7 when the sub-valve is closed. FIG. 10 is a sectional view of the same part as FIG. 5, FIG. 10 is a cross-sectional view of FIG. 8, FIG. 11 is a horizontal sectional view of another embodiment, and FIGS. It is. 1... Cylinder, 2... Main exhaust passage, 3... Sub-exhaust passage, 5... Main valve, 6... Sub-valve, 10... Pinion, 12
... Drive rod, 14, 15 ... First and second rack teeth, 20 ... Idle gear, 21 ... Valve hole, 30 ... Rack teeth.
Claims (1)
を形成し、副排気通路を主排気通路に対して開閉
する回転式サブバルブを設け、主排気通路の上壁
に、シリンダ側に向いて下方傾斜状に開口するバ
ルブ孔を形成し、該バルブ孔にスライド自在にメ
インバルブを嵌合し、両バルブを駆動するための
駆動ロツドを回転数に応じてロツド長さ方向に移
動するように備え、該駆動ロツドのシリンダ側に
第１ラツク歯を、反対側に第２ラツク歯を形成し
、第１ラツク歯にサブバルブのピニオンを噛み合
わせ、第２ラツク歯にアイドルギヤを噛み合わせ
、メインバルブの側面にラツク歯を形成して前記
アイドルギヤに噛み合せ、回転数増加時の駆動ロ
ツドの移動により、メインバルブは主排気通路の
断面積を増加させるように開くと同時にサブバル
ブも開くようにし、かつメインバルブ開時にメイ
ンバルブのラツク歯が主排気通路に露出しないよ
うにしたとを特徴とする２サイクルエンジンの排
気装置。 A main exhaust passage and a sub-exhaust passage are formed that communicate with each other in the cylinder, and a rotary sub-valve is provided to open and close the sub-exhaust passage with respect to the main exhaust passage. A main valve is slidably fitted into the valve hole, and a drive rod for driving both valves is provided to move in the length direction of the rod according to the rotation speed. A first rack tooth is formed on the cylinder side of the drive rod, and a second rack tooth is formed on the opposite side, the pinion of the sub valve is engaged with the first rack tooth, the idle gear is engaged with the second rack tooth, and the side surface of the main valve is engaged. The main valve is opened to increase the cross-sectional area of the main exhaust passage, and the sub-valve is also opened at the same time as the main valve is opened to increase the cross-sectional area of the main exhaust passage. An exhaust system for a two-stroke engine, characterized in that the hook teeth of the main valve are not exposed to the main exhaust passage when opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4415890U JPH0721871Y2 (en) | 1990-04-25 | 1990-04-25 | Exhaust system for 2-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4415890U JPH0721871Y2 (en) | 1990-04-25 | 1990-04-25 | Exhaust system for 2-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH046536U true JPH046536U (en) | 1992-01-21 |
| JPH0721871Y2 JPH0721871Y2 (en) | 1995-05-17 |
Family
ID=31557209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4415890U Expired - Lifetime JPH0721871Y2 (en) | 1990-04-25 | 1990-04-25 | Exhaust system for 2-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721871Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514530U (en) * | 1991-08-02 | 1993-02-26 | 川崎重工業株式会社 | Exhaust device for 2-cycle engine |
| JPH0514529U (en) * | 1991-08-02 | 1993-02-26 | 川崎重工業株式会社 | Exhaust device for 2-cycle engine |
-
1990
- 1990-04-25 JP JP4415890U patent/JPH0721871Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514530U (en) * | 1991-08-02 | 1993-02-26 | 川崎重工業株式会社 | Exhaust device for 2-cycle engine |
| JPH0514529U (en) * | 1991-08-02 | 1993-02-26 | 川崎重工業株式会社 | Exhaust device for 2-cycle engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0721871Y2 (en) | 1995-05-17 |