JPS6453408U - - Google Patents
Info
- Publication number
- JPS6453408U JPS6453408U JP14957287U JP14957287U JPS6453408U JP S6453408 U JPS6453408 U JP S6453408U JP 14957287 U JP14957287 U JP 14957287U JP 14957287 U JP14957287 U JP 14957287U JP S6453408 U JPS6453408 U JP S6453408U
- Authority
- JP
- Japan
- Prior art keywords
- poppet valve
- valve seat
- valve
- poppet
- large diameter
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
第１図は従来のバルブシートを示すシリンダヘ
ツドの一部断面図、第２図は本考案の一実施例を
示すシリンダヘツドの一部断面図、第３図はクラ
ンク角を変化させた場合のポペツトバルブの平均
有効開口面積を示す図、第４図は本考案の作用を
示す図である。
１……排気通路、２……ポペツトバルブ、２ａ
……ポペツトバルブの先端大径部、６……カムシ
ヤフト、１０……バルブシート、１１……バルブ
シート本体、１２……延長部。
Fig. 1 is a partial sectional view of a cylinder head showing a conventional valve seat, Fig. 2 is a partial sectional view of a cylinder head showing an embodiment of the present invention, and Fig. 3 is a partial sectional view of a cylinder head showing a conventional valve seat. FIG. 4 is a diagram showing the average effective opening area of the poppet valve, and is a diagram showing the operation of the present invention. 1...Exhaust passage, 2...Poppet valve, 2a
. . . Large diameter end portion of poppet valve, 6 . . . Camshaft, 10 . . . Valve seat, 11 . . . Valve seat body, 12 .
Claims (1)
を開閉するポペツトバルブが着座するバルブシー
ト本体に、前記ポペツトバルブ先端の大径部を囲
繞する延長部を、ポペツトバルブのリフト方向に
延在させて設けたことを特徴とする４サイクルエ
ンジンのバルブシート。 A valve seat body on which a poppet valve for opening and closing an intake passage or an exhaust passage of a four-stroke engine is seated is provided with an extension portion extending in the lift direction of the poppet valve and surrounding a large diameter portion at the tip of the poppet valve. 4-cycle engine valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14957287U JPS6453408U (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14957287U JPS6453408U (en) | 1987-09-30 | 1987-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6453408U true JPS6453408U (en) | 1989-04-03 |
Family
ID=31421921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14957287U Pending JPS6453408U (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6453408U (en) |
-
1987
- 1987-09-30 JP JP14957287U patent/JPS6453408U/ja active Pending