JPH02118136U - - Google Patents
Info
- Publication number
- JPH02118136U JPH02118136U JP2647689U JP2647689U JPH02118136U JP H02118136 U JPH02118136 U JP H02118136U JP 2647689 U JP2647689 U JP 2647689U JP 2647689 U JP2647689 U JP 2647689U JP H02118136 U JPH02118136 U JP H02118136U
- Authority
- JP
- Japan
- Prior art keywords
- valve seat
- intake port
- combustion engine
- internal combustion
- cylinder head
- 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 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
第１図及び第２図は本考案の第一実施例を示し
、第１図及び第２図は夫々シリンダヘツドの縦断
面、第３図及び第４図は本考案の第二実施例を示
し、第３図及び第４図は夫々シリンダヘツドの縦
断面、第５図は従来の吸気ポートを示すシリンダ
ヘツドの縦断面図、第６図はシート角の異なるバ
ルブシートに於けるバルブリフトと通過空気流量
との関係を示す説明図である。
５……吸気バルブ、１１，２３……バルブシー
ト、１３，２１……シリンダヘツド、１５，１９
……吸気ポート、１５ａ，１９ａ……ポート内壁
、１７，２５……絞り部。
1 and 2 show a first embodiment of the present invention, FIGS. 1 and 2 show a longitudinal section of a cylinder head, respectively, and FIGS. 3 and 4 show a second embodiment of the invention. , Figures 3 and 4 are longitudinal sections of the cylinder head, Figure 5 is a longitudinal sectional view of the cylinder head showing a conventional intake port, and Figure 6 is a diagram of valve lift and passage for valve seats with different seat angles. FIG. 3 is an explanatory diagram showing the relationship with air flow rate. 5... Intake valve, 11, 23... Valve seat, 13, 21... Cylinder head, 15, 19
...Intake port, 15a, 19a... Port inner wall, 17, 25... Throttle portion.
Claims (1)
ルブシートを装着してなる内燃機関の吸気ポート
に於て、上記バルブシートの上縁に沿つたポート
内壁を内方に突出させて、当該バルブシートより
も開口面積の狭い絞り部を設けたことを特徴とす
る内燃機関の吸気ポート。 In the intake port of an internal combustion engine in which a valve seat is attached to the intake port opening edge on the lower surface of the cylinder head, the inner wall of the port along the upper edge of the valve seat is made to protrude inwardly, so that it is larger than the valve seat. An intake port for an internal combustion engine characterized by having a throttle portion with a narrow opening area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2647689U JPH02118136U (en) | 1989-03-07 | 1989-03-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2647689U JPH02118136U (en) | 1989-03-07 | 1989-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02118136U true JPH02118136U (en) | 1990-09-21 |
Family
ID=31248138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2647689U Pending JPH02118136U (en) | 1989-03-07 | 1989-03-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02118136U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018204511A (en) * | 2017-06-02 | 2018-12-27 | マツダ株式会社 | Intake passage structure for engine |
-
1989
- 1989-03-07 JP JP2647689U patent/JPH02118136U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018204511A (en) * | 2017-06-02 | 2018-12-27 | マツダ株式会社 | Intake passage structure for engine |