JPH0276106U - - Google Patents
Info
- Publication number
- JPH0276106U JPH0276106U JP15587288U JP15587288U JPH0276106U JP H0276106 U JPH0276106 U JP H0276106U JP 15587288 U JP15587288 U JP 15587288U JP 15587288 U JP15587288 U JP 15587288U JP H0276106 U JPH0276106 U JP H0276106U
- Authority
- JP
- Japan
- Prior art keywords
- wall
- valve
- intake
- exhaust valve
- exhaust
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
第１図は本考案の一実施例に係るエンジン燃焼
室を縦断して示した概略側面図、第２図は燃焼室
内を示す平面図、第３図はバルブタイミングを説
明する説明図である。
１…シリンダヘツド、２…燃焼室、３…吸気弁
、４…排気弁、５…吸気ポート、６…排気ポート
、７…バルブシート、８…突出円弧壁、Ｏ―Ｏ…
排気弁と吸気弁の各バルブ中心を結ぶ線、ｘ…オ
ーバラツプ開始初期で吸気弁が開き始める時期、
Ａ―Ａ…突出円弧壁の排気弁側の壁面延長線、ａ
―ａ…排気弁のバルブステム軸線、Ｂ―Ｂ…突出
円弧壁の吸気弁側の壁面延長線、ｂ―ｂ…吸気弁
のバルブシート着座面延長線。
FIG. 1 is a schematic side view showing a longitudinal section of an engine combustion chamber according to an embodiment of the present invention, FIG. 2 is a plan view showing the inside of the combustion chamber, and FIG. 3 is an explanatory diagram illustrating valve timing. 1...Cylinder head, 2...Combustion chamber, 3...Intake valve, 4...Exhaust valve, 5...Intake port, 6...Exhaust port, 7...Valve seat, 8...Protruding circular arc wall, O-O...
A line connecting the centers of each exhaust valve and intake valve, x...The time when the intake valve begins to open at the beginning of overlap,
A-A... Wall extension line on the exhaust valve side of the protruding arc wall, a
-a... Valve stem axis of the exhaust valve, B-B... Extended line of the protruding arcuate wall on the intake valve side, b-b... Extended line of the valve seat seating surface of the intake valve.
Claims (1)
と排気弁の対向間に位置して排気弁のバルブ回り
を囲むように突出形成された三カ月状の突出円弧
壁を有し、 上記突出円弧壁は、排気弁と吸気弁の各バルブ
中心を結ぶ線に沿つた円弧中心部を、吸、排気弁
のオーバラツプ開始初期で吸気弁が開き始める時
期での排気バルブリフトと同一な高さに形成する
と共に、その円弧中心部から両端に至る部分を次
第に高さが低く傾斜させて端部が燃焼室内壁に連
なる高さに形成してあり、 且つ円弧壁の壁面を、その排気弁側の壁面は排
気バルブステム軸線と平行するように傾斜し、ま
た吸気弁側の壁面は吸気バルブシートの着座面と
同一になるように傾斜してなることを特徴とする
４サイクルエンジンの燃焼室。[Scope of Claim for Utility Model Registration] A three-moon shaped protrusion formed on the wall of a combustion chamber equipped with intake and exhaust valves, located between the intake and exhaust valves so as to surround the exhaust valve. It has a protruding arcuate wall, and the protruding arcuate wall has a circular arc center along a line connecting the valve centers of the exhaust valve and the intake valve. It is formed at the same height as the exhaust valve lift, and the part from the center of the arc to both ends is gradually lowered in height, and the end is formed at a height that connects to the combustion chamber wall, and the arc wall The wall surface on the exhaust valve side is sloped so as to be parallel to the exhaust valve stem axis, and the wall surface on the intake valve side is sloped so as to be flush with the seating surface of the intake valve seat. The combustion chamber of a 4-stroke engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15587288U JPH0276106U (en) | 1988-11-29 | 1988-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15587288U JPH0276106U (en) | 1988-11-29 | 1988-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0276106U true JPH0276106U (en) | 1990-06-11 |
Family
ID=31433887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15587288U Pending JPH0276106U (en) | 1988-11-29 | 1988-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0276106U (en) |
-
1988
- 1988-11-29 JP JP15587288U patent/JPH0276106U/ja active Pending
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