JPH0276144U - - Google Patents
Info
- Publication number
- JPH0276144U JPH0276144U JP15587588U JP15587588U JPH0276144U JP H0276144 U JPH0276144 U JP H0276144U JP 15587588 U JP15587588 U JP 15587588U JP 15587588 U JP15587588 U JP 15587588U JP H0276144 U JPH0276144 U JP H0276144U
- Authority
- JP
- Japan
- Prior art keywords
- ring
- scavenging
- piston
- dead center
- port
- 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.)
- Pending
Links
Landscapes
- Supercharger (AREA)
Description
第１図は本考案の実施例にかかる掃気ポンプ付
２サイクルエンジンの１例を示す概略側面図、第
２図および第３図は要部となるシリンダ部分の縦
断側面図で、第２図はピストンの上死点時を示し
第３図は同下死点時を示す。第４図は従来例の説
明図である。
１０…シリンダ、１１…ピストン、１２…クラ
ンクケース、１３…オイルパン、１４…掃気ポー
ト、１５…排気ポート、１６…ロータリ弁、１９
…掃気通路、２０…掃気ポンプ、２３…トツプリ
ング、２４…セカンドリング、２５…サードリン
グ、Ａ…上死点におけるサードリングの上昇位置
、Ｂ…下死点におけるトツプリングの下降位置。
FIG. 1 is a schematic side view showing an example of a two-stroke engine with a scavenging pump according to an embodiment of the present invention, FIGS. 2 and 3 are vertical side views of the main cylinder part, and FIG. FIG. 3 shows the piston at the top dead center, and FIG. 3 shows the piston at the bottom dead center. FIG. 4 is an explanatory diagram of a conventional example. 10...Cylinder, 11...Piston, 12...Crankcase, 13...Oil pan, 14...Scavenging port, 15...Exhaust port, 16...Rotary valve, 19
... scavenging passage, 20... scavenging pump, 23... top ring, 24... second ring, 25... third ring, A... raised position of third ring at top dead center, B... lowered position of top ring at bottom dead center.
Claims (1)
される掃気ポートを有し、該ポートに連通する掃
気通路に掃気ポンプを具備してポンプによる掃気
圧で掃気を行なう２サイクルエンジンにおいて、 上記ピストンの頭部周面に圧縮リング形のトツ
プリング、セカンドリングと、下部周面に同じく
圧縮リング形のサードリングとを有し、 上記トツプリングおよびサードリングの相対位
置を、ピストン上死点におけるサードリングの上
昇位置に対し、下死点におけるトツプリングの下
降位置が略同一レベル近辺に位置するような関係
に配設してなることを特徴とする掃気ポンプ付２
サイクルエンジンのピストン。[Scope of Claim for Utility Model Registration] A two-stroke engine having a scavenging port on the cylinder peripheral wall that is opened and closed by the rise and fall of a piston, a scavenging pump provided in the scavenging passage communicating with the port, and scavenging using the scavenging pressure of the pump. The piston has a compression ring-shaped top ring and a second ring on the head circumference, and a compression ring-shaped third ring on the lower circumference, and the relative positions of the top ring and the third ring are determined on the piston. 2 with a scavenging pump characterized in that the lowered position of the top ring at the bottom dead center is located at approximately the same level as the raised position of the third ring at the dead center.
cycle engine piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15587588U JPH0276144U (en) | 1988-11-29 | 1988-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15587588U JPH0276144U (en) | 1988-11-29 | 1988-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0276144U true JPH0276144U (en) | 1990-06-11 |
Family
ID=31433893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15587588U Pending JPH0276144U (en) | 1988-11-29 | 1988-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0276144U (en) |
-
1988
- 1988-11-29 JP JP15587588U patent/JPH0276144U/ja active Pending