JPS63128209U - - Google Patents
Info
- Publication number
- JPS63128209U JPS63128209U JP1987019420U JP1942087U JPS63128209U JP S63128209 U JPS63128209 U JP S63128209U JP 1987019420 U JP1987019420 U JP 1987019420U JP 1942087 U JP1942087 U JP 1942087U JP S63128209 U JPS63128209 U JP S63128209U
- Authority
- JP
- Japan
- Prior art keywords
- section
- valve
- cam
- intake
- constant
- 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
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Description
第１図は本考案の実施例の縦断正面図、第２図
は同上実施例におけるカムの形状をバルブリフト
で表わした線図、第３図は同上実施例におけるカ
ムプロフイルの緩衝部の形状をバルブリフトとバ
ルブリフト速度とでそれぞれ表わした線図、第４
図は同上実施例におけるエンジン回転の変化に応
じた、カムの作用角を示す線図である。
１……吸排気弁、３……バルブリフタ、４……
カム、５……カム軸、６……軸受、７……軸受部
、８……シリンダヘツド、１０……スプリング、
１１……圧電素子、１２……高圧電源、１３……
電子制御装置、１４……エンジン回転数検出セン
サ、Ａ……基礎円部、Ｂ……緩衝部、Ｃ……揚程
部、Ｄ……定加速度部、Ｅ……定速度部、Ｅ１…
…第１定速度部、Ｅ２……第２定速度部、Ｆ……
加加速度部。
Fig. 1 is a longitudinal sectional front view of an embodiment of the present invention, Fig. 2 is a diagram showing the shape of the cam in the above embodiment in terms of valve lift, and Fig. 3 shows the shape of the buffer section of the cam profile in the above embodiment. Diagram 4 showing valve lift and valve lift speed, respectively.
The figure is a diagram showing the working angle of the cam according to the change in engine rotation in the same embodiment. 1... Intake and exhaust valve, 3... Valve lifter, 4...
Cam, 5...Camshaft, 6...Bearing, 7...Bearing portion, 8...Cylinder head, 10...Spring,
11...Piezoelectric element, 12...High voltage power supply, 13...
Electronic control device, 14...Engine speed detection sensor, A...Base circle section, B...Buffer section, C...Lifting section, D...Constant acceleration section, E...Constant speed section, E1 ...
...First constant speed section, E2 ...Second constant speed section, F...
jerk part.
Claims (1)
る緩衝部と該緩衝部に連なる揚程部とからなる弁
駆動用カムと、該カムを取付けかつシリンダヘツ
ドに支持されたカム軸と、前記カムに摺接するバ
ルブリフタを有しかつ該カムの回転により開閉さ
れる吸排気弁とを備え、前記カム軸をエンジン回
転数に応じて前記吸排気弁の弁軸方向に移動させ
、前記吸排気弁の開閉時期を変化させるようにし
た内燃機関の弁作動機構において、前記カムプロ
フイルの緩衝部を、基礎円部に連なる定加速度部
、該定加速度部に連なる速度の小さい第１の定速
度部、該第１の定速度部に連なる速度の大きい第
２の定速度部、及び該第２の定速度部に連なる加
加速度部により構成したことを特徴とする弁作動
機構。 A valve drive cam whose cam profile includes a base circle portion, a buffer portion connected to the base circle portion, and a lift portion connected to the buffer portion; a cam shaft to which the cam is attached and supported by a cylinder head; an intake and exhaust valve that has a valve lifter that slides into contact with the intake and exhaust valves and is opened and closed by the rotation of the cam, and the camshaft is moved in the direction of the valve axis of the intake and exhaust valve according to the engine rotation speed to open and close the intake and exhaust valve. In a valve actuation mechanism for an internal combustion engine that changes the timing, the buffer section of the cam profile includes a constant acceleration section connected to the base circle section, a first constant speed section having a lower speed connected to the constant acceleration section, and the first constant acceleration section connected to the constant acceleration section. A valve operating mechanism comprising: a second constant speed section having a high speed connected to the first constant speed section; and a jerk section connected to the second constant speed section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987019420U JPS63128209U (en) | 1987-02-14 | 1987-02-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987019420U JPS63128209U (en) | 1987-02-14 | 1987-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63128209U true JPS63128209U (en) | 1988-08-22 |
Family
ID=30814001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987019420U Pending JPS63128209U (en) | 1987-02-14 | 1987-02-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63128209U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011032928A (en) * | 2009-07-31 | 2011-02-17 | Honda Motor Co Ltd | Valve gear for internal combustion engine |
-
1987
- 1987-02-14 JP JP1987019420U patent/JPS63128209U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011032928A (en) * | 2009-07-31 | 2011-02-17 | Honda Motor Co Ltd | Valve gear for internal combustion engine |
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