JPH03114505U - - Google Patents
Info
- Publication number
- JPH03114505U JPH03114505U JP2261790U JP2261790U JPH03114505U JP H03114505 U JPH03114505 U JP H03114505U JP 2261790 U JP2261790 U JP 2261790U JP 2261790 U JP2261790 U JP 2261790U JP H03114505 U JPH03114505 U JP H03114505U
- Authority
- JP
- Japan
- Prior art keywords
- eccentric
- rocker
- cam profile
- eccentric bush
- rocker arm
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Valve Device For Special Equipments (AREA)
Description
第１図Ａは第２図の偏心ブツシユおよびロツカ
シヤフトを示す断面図、第１図Ｂは第１図Ａの偏
心ブツシユに対比する偏心ブツシユ等を示す断面
図、第２図はこの考案に係る４サイクルエンジン
の動弁装置の一実施例を示す斜視図、第３図は第
２図の動弁装置の平面図、第４図および第５図は
第２図の動弁装置の作用を示す動作状態図、第６
図は第２図のカムのカムプロフイールを示す図、
第７図および第８図は第６図に示すカムプロフイ
ールのそれぞれの変形例を示す図である。
１，２……バルブ、３……低速用カム、４，５
……中高速用カム、７……低速用ロツカアーム、
７ａ……低速用ロツカアームの支持部、８，９…
…中高速用ロツカアーム、８ａ，９ａ……中高速
用ロツカアームの支持部、１０……抜止めピン、
１１……ロツカシヤフト、１２，１３……偏心ブ
ツシユ、１２ａ，１３ａ……偏心ブツシユの厚肉
頂部、２１，２２……偏心ブツシユのピン挿入孔
、２４……偏心ブツシユのピン抜き孔。
FIG. 1A is a sectional view showing the eccentric bushing and rocker shaft in FIG. A perspective view showing an embodiment of the valve train for a cycle engine, FIG. 3 is a plan view of the valve train shown in FIG. 2, and FIGS. 4 and 5 show the operation of the valve train shown in FIG. 2. State diagram, 6th
The figure shows the cam profile of the cam in Figure 2,
FIGS. 7 and 8 are diagrams showing modifications of the cam profile shown in FIG. 6, respectively. 1, 2... Valve, 3... Low speed cam, 4, 5
...cam for medium and high speeds, 7...rotsuka arm for low speeds,
7a...Low speed rocker arm support part, 8, 9...
...Locker arm for medium and high speeds, 8a, 9a...Support part of locker arm for medium and high speeds, 10...Retaining pin,
11... Lock shaft, 12, 13... Eccentric bush, 12a, 13a... Thick top of eccentric bush, 21, 22... Pin insertion hole of eccentric bush, 24... Pin extraction hole of eccentric bush.
Claims (1)
ク大径部が形成されたロツカシヤフトと、このロ
ツカシヤフトに直接嵌挿された第１のロツカアー
ムと、この第１のロツカアームの両側に配置され
て上記エキセントリツク大径部に嵌挿された第２
および第３のロツカアームと、上記第１、第２お
よび第３のロツカアームをそれぞれ駆動する第１
、第２および第３のカムと、を有し、上記第２お
よび第３のカムが同じカムプロフイールに形成さ
れ、上記第１のカムのカムプロフイールが上記カ
ムプロフイールと異なつて形成され、また、上記
エキセントリツク大径部は偏心ブツシユおよび抜
止めピンを備え、この抜止めピンが偏心ブツシユ
の厚肉頂部および上記ロツカシヤフトに挿入され
るとともに、このロツカシヤフトは上記偏心ブツ
シユの厚肉頂部を常に上半側に設置させた状態で
回動されることを特徴とする４サイクルエンジン
の動弁装置。 a rocker shaft rotatably supported and formed with an eccentric large diameter portion; a first rocker arm directly fitted into the rocker shaft; The second part inserted into the
and a third rocker arm, and a first rocker arm that drives the first, second and third rocker arms, respectively.
, second and third cams, the second and third cams are formed with the same cam profile, the cam profile of the first cam is formed differently from the cam profile, and The large diameter portion of the eccentric is equipped with an eccentric bush and a retaining pin, and the retaining pin is inserted into the thick top of the eccentric bush and the lock shaft, and the lock shaft always keeps the thick top of the eccentric bush in the upper half. A valve train for a four-stroke engine, which is characterized by being rotated while installed on the side.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990022617U JPH0755283Y2 (en) | 1990-03-08 | 1990-03-08 | 4-cycle engine valve drive |
| US07/664,273 US5148783A (en) | 1990-03-08 | 1991-03-04 | Valve actuating mechanism in four-stroke cycle engine |
| EP91103417A EP0450332B1 (en) | 1990-03-08 | 1991-03-06 | Valve actuating mechanism in four-stroke cycle engine |
| DE69110332T DE69110332T2 (en) | 1990-03-08 | 1991-03-06 | Valve drive device for four-stroke internal combustion engine. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990022617U JPH0755283Y2 (en) | 1990-03-08 | 1990-03-08 | 4-cycle engine valve drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03114505U true JPH03114505U (en) | 1991-11-25 |
| JPH0755283Y2 JPH0755283Y2 (en) | 1995-12-20 |
Family
ID=31525623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990022617U Expired - Fee Related JPH0755283Y2 (en) | 1990-03-08 | 1990-03-08 | 4-cycle engine valve drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755283Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007138819A (en) * | 2005-11-17 | 2007-06-07 | Toyota Motor Corp | Variable valve gear for internal combustion engine |
| JP2010163911A (en) * | 2009-01-14 | 2010-07-29 | Nissan Motor Co Ltd | Valve train of engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514416A (en) * | 1974-06-29 | 1976-01-14 | Toyota Motor Co Ltd | Nainenkikanniokeru kyukikyokyuhoho oyobi kozo |
| JPS63117111A (en) * | 1986-11-01 | 1988-05-21 | Honda Motor Co Ltd | Device for switching valve operating timing of internal combustion engine |
-
1990
- 1990-03-08 JP JP1990022617U patent/JPH0755283Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514416A (en) * | 1974-06-29 | 1976-01-14 | Toyota Motor Co Ltd | Nainenkikanniokeru kyukikyokyuhoho oyobi kozo |
| JPS63117111A (en) * | 1986-11-01 | 1988-05-21 | Honda Motor Co Ltd | Device for switching valve operating timing of internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007138819A (en) * | 2005-11-17 | 2007-06-07 | Toyota Motor Corp | Variable valve gear for internal combustion engine |
| JP4485456B2 (en) * | 2005-11-17 | 2010-06-23 | トヨタ自動車株式会社 | Variable valve mechanism for internal combustion engine |
| JP2010163911A (en) * | 2009-01-14 | 2010-07-29 | Nissan Motor Co Ltd | Valve train of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0755283Y2 (en) | 1995-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |