JPH02131054U - - Google Patents
Info
- Publication number
- JPH02131054U JPH02131054U JP4028089U JP4028089U JPH02131054U JP H02131054 U JPH02131054 U JP H02131054U JP 4028089 U JP4028089 U JP 4028089U JP 4028089 U JP4028089 U JP 4028089U JP H02131054 U JPH02131054 U JP H02131054U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- exhaust
- port
- forced air
- cooled overhead
- 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
- 238000001816 cooling Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 1
Description
第１図乃至第４図は本考案の実施例に係る強制
空冷頭上弁エンジンのシリンダヘツドを説明する
図で、第１図Ａは第２図の排気弁口のＡ方向矢視
図、第１図Ｂは第２図のＢ−Ｂ線断面図、第１図
Ｃは第２図のＣ−Ｃ線断面図、第１図Ｄは第２図
のＤ−Ｄ線断面図、第１図Ｅは第２図の排気出口
のＥ方向矢視図、第２図は第３図の−線断面
図、第３図はシリンダヘツドの横断面平面図、第
４図は実施例と従来技術の排温とスモークの発生
についての試験結果の比較を示すグラフ、第５図
は従来技術の第１図相当図、第６図は従来技術の
第２図相当図である。
２……シリンダヘツド、３……２の本体、４…
…排気ポート、５……冷却風路、６……冷却風路
、７……４の始端側部、８……ガイドボス、９…
…４の排気弁口、１０……軸、１１……４の基本
円、１２……断面矩形状下半部、１３……４の排
気出口。
1 to 4 are views for explaining the cylinder head of a forced air-cooled overhead valve engine according to an embodiment of the present invention, and FIG. Figure B is a sectional view taken along the line B-B in Figure 2, Figure 1 C is a sectional view taken along the line CC in Figure 2, Figure 1 D is a sectional view taken along the line D-D in Figure 2, and Figure 1 E. 2 is a sectional view of the exhaust outlet in the E direction in FIG. 2, FIG. 2 is a sectional view taken along the line - in FIG. 3, FIG. 3 is a cross-sectional plan view of the cylinder head, and FIG. Graphs showing a comparison of test results regarding temperature and smoke generation, FIG. 5 is a diagram corresponding to FIG. 1 of the prior art, and FIG. 6 is a diagram equivalent to FIG. 2 of the prior art. 2... Cylinder head, 3... Main body of 2, 4...
...Exhaust port, 5...Cooling air path, 6...Cooling air path, 7...Starting end side of 4, 8...Guide boss, 9...
... Exhaust valve port of 4, 10... Axis, 11... Basic circle of 4, 12... Lower half of rectangular cross section, 13... Exhaust outlet of 4.
Claims (1)
本体３内で、排気ポート４の両側にそれぞれ冷却
風路５，６を設け、排気ポート４の始端側部７の
上側面から排気弁軸のガイドボス８を排気弁口９
に向けて突入させて構成した強制空冷頭上弁エン
ジンのシリンダヘツドにおいて、 排気ポート４のガイドボス８が突入する部分の
軸１０直交断面の下半部の形状を、排気ポート４
の基本円１１に外接するほぼ矩形状に形成し、こ
の断面矩形状下半部１２の内周面を、排気ポート
４の排気弁口９側の内周面に亙つても排気出口１
３側の内周面に亙つても滑らかに連続させて形成
した ことを特徴とする強制空冷頭上弁エンジンのシ
リンダヘツド。[Scope of Claim for Utility Model Registration] In the main body 3 of the cylinder head 2 of the forced air-cooled overhead valve engine, cooling air passages 5 and 6 are provided on both sides of the exhaust port 4, respectively, and the upper surface of the starting end side 7 of the exhaust port 4 is provided. From the guide boss 8 of the exhaust valve shaft to the exhaust valve port 9
In the cylinder head of a forced air-cooled overhead valve engine configured to protrude toward
The inner circumferential surface of the lower half 12 having a rectangular cross section extends to the inner circumferential surface of the exhaust port 4 on the exhaust valve port 9 side as well.
A cylinder head for a forced air-cooled overhead valve engine, characterized in that it is formed smoothly and continuously over the inner peripheral surface on the third side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989040280U JP2518282Y2 (en) | 1989-04-04 | 1989-04-04 | Cylinder head of forced air cooling overhead valve engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989040280U JP2518282Y2 (en) | 1989-04-04 | 1989-04-04 | Cylinder head of forced air cooling overhead valve engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02131054U true JPH02131054U (en) | 1990-10-30 |
| JP2518282Y2 JP2518282Y2 (en) | 1996-11-27 |
Family
ID=31549938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989040280U Expired - Lifetime JP2518282Y2 (en) | 1989-04-04 | 1989-04-04 | Cylinder head of forced air cooling overhead valve engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2518282Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011247270A (en) * | 2011-08-11 | 2011-12-08 | Toyota Motor Corp | Port structure of internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131538A (en) * | 1979-03-19 | 1980-10-13 | Gen Motors Corp | Internal combustion engine |
| JPS6053649A (en) * | 1983-08-08 | 1985-03-27 | デイ−ア・アンド・カンパニ− | Exhaust port |
| JPS6390661A (en) * | 1986-10-02 | 1988-04-21 | Honda Motor Co Ltd | Cylinder head for air-cooled engine |
-
1989
- 1989-04-04 JP JP1989040280U patent/JP2518282Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131538A (en) * | 1979-03-19 | 1980-10-13 | Gen Motors Corp | Internal combustion engine |
| JPS6053649A (en) * | 1983-08-08 | 1985-03-27 | デイ−ア・アンド・カンパニ− | Exhaust port |
| JPS6390661A (en) * | 1986-10-02 | 1988-04-21 | Honda Motor Co Ltd | Cylinder head for air-cooled engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011247270A (en) * | 2011-08-11 | 2011-12-08 | Toyota Motor Corp | Port structure of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2518282Y2 (en) | 1996-11-27 |