JPS6239243B2 - - Google Patents
Info
- Publication number
- JPS6239243B2 JPS6239243B2 JP56015252A JP1525281A JPS6239243B2 JP S6239243 B2 JPS6239243 B2 JP S6239243B2 JP 56015252 A JP56015252 A JP 56015252A JP 1525281 A JP1525281 A JP 1525281A JP S6239243 B2 JPS6239243 B2 JP S6239243B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- intake
- rocker arm
- cam
- rod
- 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
【発明の詳細な説明】
この発明は自動車等のエンジンの動弁装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve train for an engine of an automobile or the like.
一般に、自動車エンジンの動弁装置は、第１図
に示すように、シリンダヘツド１の上部に揺動可
能に枢支された排気側ロツカアーム２および吸気
側ロツカアーム３の一端を、クランク軸と同期回
転するカムシヤフト４の吸気弁カムおよび排気弁
カムに当接させる一方、他端にはアジヤストスク
リユ５，５を取り付け、該アジヤストスクリユ
５，５を排気弁１０、吸気弁１１の弁軸１０ａ，
１１ａの頭部に当接させ、カムシヤフト４の回転
に応じて、吸排気弁１１，１０をバルブガイド１
２，１２内を摺動させ、排気口８、吸気口９を所
定のタイミングで開いて燃焼室７と連通させると
共に、吸排気弁１１，１０に取り付けたスプリン
グ１３，１３により常時閉方向に付勢し、吸排気
弁１１，１０を閉作動するようにしている。（実
開昭55−161006号公報参照）
このような動弁装置においては、アジヤストス
クリユ５と吸排気弁１１，１０の弁軸頭部、ロツ
カアームとカムとの間の夫々の接触部に所定の間
隙が必要なため当接時に異音が生じ、エンジン騒
音の一因となつている。 Generally, as shown in FIG. 1, a valve train for an automobile engine rotates one end of an exhaust side rocker arm 2 and an intake side rocker arm 3, which are swingably supported on the upper part of a cylinder head 1, in synchronization with the crankshaft. The adjusting screws 5, 5 are attached to the other end of the camshaft 4, and the adjusting screws 5, 5 are attached to the valve shafts of the exhaust valve 10 and the intake valve 11. 10a,
11a, and according to the rotation of the camshaft 4, the intake and exhaust valves 11 and 10 are moved to the valve guide 1.
2 and 12 to open the exhaust port 8 and the intake port 9 at a predetermined timing to communicate with the combustion chamber 7, and the springs 13 and 13 attached to the intake and exhaust valves 11 and 10 keep them always in the closed direction. The intake and exhaust valves 11 and 10 are closed. (Refer to Japanese Utility Model Application Publication No. 55-161006.) In such a valve train, there are Since a predetermined gap is required, an abnormal noise is generated when they come into contact, which is a cause of engine noise.
上記した異音の発生を防止するものとして、第
２図に示す如く、吸排気弁カム４とロツカアーム
３および２の間に油圧間隙調整装置１５を介在さ
せ、カム４とロツカアーム３および２の間、アジ
ヤストスクリユ５と吸排気弁１１′，１０′の弁軸
頭部の伝動系路に間隙が生じるのを常時防止し、
作動時の異音発生を抑えるようにしたものがあ
る。（実開昭54−140110号公報参照）
しかしながら、上記油圧間隙調整装置１５を設
けた場合、吸排気弁１１′，１０′の長さが大きく
なり、そのため、シリンダヘツド１′の巾寸法を
広げる必要が生じ、かつ、吸排気弁を案内するバ
ルブガイド１２を支持し、スプリング１３のロア
シートとなる弁台１６等が必要となる。よつて、
油圧間隙調整装置を配設する場合と、しない場合
では、シリンダヘツド、吸排気弁、バルブガイド
等の形状が異なり、これらを共通化して用いるこ
とができないため、コスト高になる問題がある。 In order to prevent the above-mentioned abnormal noise, a hydraulic gap adjustment device 15 is interposed between the intake/exhaust valve cam 4 and the rocker arms 3 and 2, as shown in FIG. , constantly preventing gaps from forming in the power transmission path between the adjusting screw 5 and the valve shaft heads of the intake and exhaust valves 11' and 10';
Some devices are designed to suppress abnormal noises during operation. (Refer to Japanese Utility Model Application Publication No. 54-140110.) However, when the hydraulic gap adjustment device 15 is provided, the lengths of the intake and exhaust valves 11' and 10' increase, which increases the width of the cylinder head 1'. A valve stand 16, etc., which supports the valve guide 12 that guides the intake and exhaust valves and serves as the lower seat of the spring 13, becomes necessary. Then,
The shapes of the cylinder head, intake and exhaust valves, valve guides, etc. are different depending on whether a hydraulic gap adjustment device is provided or not, and because these cannot be used in common, there is a problem of high costs.
この発明は、上記した問題を解消せんとするも
のであり、カムとロツカアームとの間に介在して
カムの作動をロツカアームに伝達すると共に、カ
ム、ロツカアーム、ロツドおよび弁軸の伝動系路
に間隙が生じるのを防止する油圧間隙調整装置を
保持する保持体を吸排気弁側まで伸長して、アジ
ヤストスクリユと吸排気弁の弁軸頭部の間に介在
させるロツドを摺動自在に保持する保持部を形成
し、該保持体をシリンダヘツドに着脱自在に固定
できるようにし、よつて、油圧間隙調整装置を用
いた場合と用いない場合のいずれにも、同一のシ
リンダヘツド、吸排気弁を用いることができるよ
うにし、部品の共通化を図ることによりコストを
低下し、かつ、エンジン騒音を防止するようにし
たことを特徴とするエンジンの動弁装置を提供せ
んとするものである。 This invention aims to solve the above-mentioned problems, and is intended to transmit the operation of the cam to the rocker arm by interposing it between the cam and the rocker arm, and also to create a gap in the transmission line between the cam, the rocker arm, the rod, and the valve shaft. The holder that holds the hydraulic gap adjustment device that prevents the occurrence of the gap is extended to the intake and exhaust valve side, and the rod that is interposed between the adjustment screw and the valve shaft head of the intake and exhaust valve is slidably held. The holding part is formed so that the holding body can be detachably fixed to the cylinder head, so that the same cylinder head and intake/exhaust valve can be used whether the hydraulic gap adjustment device is used or not. It is an object of the present invention to provide a valve operating device for an engine, which is characterized in that it is possible to use the engine, reduce costs by standardizing parts, and prevent engine noise.
以下、この発明を第３図及び第４図に示す実施
例により詳細に説明する。尚、第１図に示す従来
例と同一の部材は同一符号を符して説明を省略す
る。 Hereinafter, this invention will be explained in detail with reference to the embodiments shown in FIGS. 3 and 4. Incidentally, the same members as those in the conventional example shown in FIG. 1 are designated by the same reference numerals, and the explanation thereof will be omitted.
シリンダヘツド１の上端面に着脱自在に取り付
ける保持体２０は、カムシヤフトの軸線と平行に
伸びるものであり、図示の如く、吸気弁カムおよ
び排気弁カムの上方位置となる部位に、垂直方向
の円筒状の油圧間隙調整装置嵌合部２１，２２を
連続して形成すると、上記嵌合部２１，２２より
それぞれロツカーアーム２，３の下方に沿つて延
びる伸長部２３，２４を設け、該伸長部２３，２
４の先端に弁軸線方向の摺動孔２５，２６を穿設
してロツド保持部を形成している。さらに、保持
体２０にはシリンダヘツド固定部２８，２８を形
成し、ボルト２７を介してシリンダヘツド１に着
脱自在に固定するようにしている。上記保持体２
０には、シリンダヘツド１に穿設したオイル通路
（図示せず）と連通したオイル通路３０を設けて
いる。該オイル通路３０は上記嵌合部２１，２２
に連通し、該嵌合部２１，２２に嵌合する油圧間
隙調整装置１５のオイル通路と連通し、油圧間隙
調整装置１５のロツカアーム当接部材１５ａを上
方に付勢してロツカアーム２，３に圧接させるよ
うにしている。 The holder 20, which is removably attached to the upper end surface of the cylinder head 1, extends parallel to the axis of the camshaft.As shown in the figure, the holder 20 has a vertical cylindrical shape located above the intake valve cam and the exhaust valve cam. When the hydraulic gap adjustment device fitting parts 21 and 22 of the shape are formed continuously, extension parts 23 and 24 are provided which extend from the fitting parts 21 and 22 along the lower part of the rocker arms 2 and 3, respectively. ,2
Sliding holes 25 and 26 in the valve axis direction are bored at the tip of the rod 4 to form a rod holding portion. Furthermore, cylinder head fixing parts 28, 28 are formed on the holder 20, and are detachably fixed to the cylinder head 1 via bolts 27. The above holding body 2
0 is provided with an oil passage 30 that communicates with an oil passage (not shown) bored in the cylinder head 1. The oil passage 30 is connected to the fitting portions 21 and 22.
communicates with the oil passage of the hydraulic gap adjustment device 15 that fits into the fitting portions 21 and 22, and urges the rocker arm abutting member 15a of the hydraulic gap adjustment device 15 upward to the rocker arms 2 and 3. I try to press them together.
上記油圧間隙調整装置１５は各嵌合部２１，２
１内でカムシヤフト４のカムにより上下摺動し、
ロツカアーム２，３を揺動させる。 The hydraulic gap adjustment device 15 includes each fitting portion 21, 2.
1, it slides up and down by the cam of camshaft 4,
Rocker arms 2 and 3 are swung.
一方、ロツカアーム２，３の他端と吸排気弁１
１，１０の弁軸１１ａ，１０ａの頭部の間には、
ロツド３１，３２を介在させ、該ロツド３１，３
２を保持体２０に穿設した摺動孔２５，２６に弁
軸１０ａ，１１ａの軸中心線方向に上下動自在に
嵌合させている。上記保持体２０には各ロツド３
１，３２にオイルを供給する通路３３がオイル通
路３０と接続して設けてある。 On the other hand, the other ends of the rocker arms 2 and 3 and the intake and exhaust valve 1
Between the heads of valve shafts 11a and 10a of 1 and 10,
The rods 31, 32 are interposed, and the rods 31, 3
2 are fitted into sliding holes 25 and 26 formed in the holder 20 so as to be able to move up and down in the direction of the axis center line of the valve shafts 10a and 11a. Each rod 3 is attached to the holding body 20.
A passage 33 for supplying oil to the oil passages 1 and 32 is connected to the oil passage 30.
上記した構成とすると、ロツカアーム２，３が
油圧間隙調整装置１５により、常時上方に付勢さ
れるため、他端側では下方に付勢され、ロツカア
ーム２，３とロツド３１，３２の間、ロツド３
１，３２と吸排気弁１１，１０の伝動系路に間隙
が生じるのが防止される。よつて、上記伝動系路
中で、作動時に当接により異音が発生するのが防
止できると共に、かつ、ロツド３１，３２の配設
により第１図および第２図に示すようにロツカア
ーム２，３の揺動により直接吸排気弁１１，１
１′，１０，１０′を作動させた場合弁軸１１ａ，
１０ａにモーメントが働いて傾ける力が作用し、
弁軸１１ａ，１０ａがバルブガイド１２，１２と
衝突して異音が発生する問題が、ロツド３１，３
２によつて弁軸１１ａ，１０ａを弁軸の軸中心線
方向に上下動させるため、弁軸１１ａ，１０ａに
傾く力が作用せず弁軸１１ａ，１０ａがバルブガ
イド１２，１２と衝突することが防止できる。す
なわち、ロツカアーム２，３の揺動によつて傾く
力はロツド３１，３２を介して保持体２０で受け
るため、ロツカアームタイプの異音は生じない。 With the above configuration, since the rocker arms 2 and 3 are always urged upward by the hydraulic gap adjustment device 15, the other end side is urged downward, and the rod 3
This prevents gaps from forming in the transmission lines between the valves 1 and 32 and the intake and exhaust valves 11 and 10. Therefore, it is possible to prevent abnormal noise from occurring due to contact during operation in the transmission path, and the arrangement of the rods 31 and 32 allows the rocker arms 2 and 2 to be moved as shown in FIGS. 1 and 2. Direct intake/exhaust valves 11, 1 due to the rocking of 3
1', 10, 10', the valve shaft 11a,
A moment acts on 10a and a tilting force acts on it,
The problem of the valve shafts 11a, 10a colliding with the valve guides 12, 12 and causing abnormal noise is caused by the valve shafts 31, 3.
2 causes the valve shafts 11a, 10a to move up and down in the direction of the axis center line of the valve shafts, so no tilting force is applied to the valve shafts 11a, 10a, and the valve shafts 11a, 10a collide with the valve guides 12, 12. can be prevented. That is, since the tilting force caused by the swinging of the rocker arms 2 and 3 is received by the holder 20 via the rods 31 and 32, no abnormal noise occurs as in the rocker arm type.
さらに、上記装置では、ロツド３１，３２を用
いるため、吸排気弁１１，１０の長さを長くする
必要はない。そのため、油圧間隙調整装置１５を
採用しない第１図に示す如き動弁装置に用いるシ
リンダヘツド、吸排気弁およびバルブガイドを用
いることができ、該シリンダヘツドに保持体２０
を固定すると共に、ロツカアーム２，３と吸排気
弁１１，１０の間に夫々ロツド３１，３２を介在
させるとよく、ヘツドカバーのみを変えるとよ
い。このように、油圧間隙調整装置を採用する場
合と採用しない場合の両方に、シリンダヘツド、
吸排気弁、バルブガイド等の共通化が出来る。 Furthermore, in the above device, since the rods 31 and 32 are used, there is no need to increase the length of the intake and exhaust valves 11 and 10. Therefore, it is possible to use a cylinder head, an intake/exhaust valve, and a valve guide used in a valve train as shown in FIG.
It is preferable to fix the head cover and to interpose rods 31 and 32 between the rocker arms 2 and 3 and the intake and exhaust valves 11 and 10, respectively, and to change only the head cover. In this way, the cylinder head,
Intake and exhaust valves, valve guides, etc. can be shared.
以上の説明より明らかなように、この発明に係
る動弁装置によれば、ロツカアームと吸排気弁の
間に介在されるロツドを設けると共に、カム、ロ
ツカアーム、ロツドおよび弁軸の伝動系路に間〓
が生じるのを防止する。 As is clear from the above description, according to the valve train according to the present invention, a rod is provided between the rocker arm and the intake/exhaust valve, and an interval is provided between the cam, the rocker arm, the rod, and the transmission line of the valve shaft. 〓
prevent the occurrence of
油圧間隙調整装置を保持する保持体を延長して
上記ロツドを摺動自在に保持する摺動孔を形成
し、該保持体をシリンダヘツドに着脱自在に固定
するようにすることにより、油圧間隙調整装置を
採用しない動弁装置と部品の共通化を図ることが
出来、よつて、安価に油圧間隙調整装置を採用で
き、ロツカアームタイプにおけるエンジン騒音の
発生を防止することができる利点を有するもので
ある。 The hydraulic gap can be adjusted by extending the holder that holds the hydraulic gap adjustment device to form a sliding hole that slidably holds the rod, and by fixing the holder to the cylinder head in a detachable manner. It has the advantage of being able to share parts with a valve train that does not require a device, therefore allowing the use of a hydraulic clearance adjustment device at a low cost, and preventing the generation of engine noise in the rocker arm type. be.
第１図は従来の動弁装置の断面図、第２図は油
圧間隙調整装置を採用した従来の動弁装置の断面
図、第３図は本発明の動弁装置の断面図、第４図
はヘツドカバーを取り除いた状態の第３図の平面
図である。
１……シリンダヘツド、２，３……ロツカアー
ム、４……カムシヤフト、８……排気口、９……
吸気口、１０……排気弁、１１……吸気弁、１２
……バルブガイド、１３……スプリング、１５…
…油圧間隙調整装置、２０……保持体、２７……
ボルト、３１，３２……ロツド。
FIG. 1 is a cross-sectional view of a conventional valve train, FIG. 2 is a cross-sectional view of a conventional valve train employing a hydraulic gap adjustment device, FIG. 3 is a cross-sectional view of a valve train of the present invention, and FIG. 3 is a plan view of FIG. 3 with the head cover removed; FIG. 1... Cylinder head, 2, 3... Locker arm, 4... Camshaft, 8... Exhaust port, 9...
Intake port, 10...Exhaust valve, 11...Intake valve, 12
...Valve guide, 13...Spring, 15...
... Hydraulic gap adjustment device, 20 ... Holding body, 27 ...
Bolt, 31, 32... Rod.
Claims (1)
弁と、 エンジンと同期して回転するカムと、 該カムの作動を上記弁に伝達するロツカアーム
と、 上記弁を閉方向に常時付勢するスプリングと、 上記弁の弁軸頭部とロツカアームとの間に介在
し、ロツカアームの作動を上記弁に伝達するロツ
ドと、 シリンダヘツドに着脱自在に固定され、上記ロ
ツドを弁軸の軸中心線方向に上下動自在に保持
し、かつ、上記ロツカアームとカムとの間に介在
してカムの作動をロツカアームに伝達すると共
に、カム、ロツカアーム、ロツドおよび弁軸の伝
動系路に間〓が生じるのを防止する油圧間〓調整
装置が配設された保持体と、 を備えたことを特徴とするエンジンの動弁装置。[Scope of Claims] 1. An intake and exhaust valve that opens and closes an intake and exhaust port opening into a combustion chamber, a cam that rotates in synchronization with the engine, a rocker arm that transmits the operation of the cam to the valve, and a valve that closes the valve. a spring that is always biased in the direction of the valve; a rod that is interposed between the valve shaft head of the valve and the rocker arm and that transmits the operation of the rocker arm to the valve; and a rod that is detachably fixed to the cylinder head and that connects the rod to the valve shaft. The shaft is held movable up and down in the direction of the shaft center line, and is interposed between the rocker arm and the cam to transmit the operation of the cam to the rocker arm. 1. A valve operating device for an engine, comprising: a holding body provided with a hydraulic pressure adjustment device for preventing the occurrence of water pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1525281A JPS57129210A (en) | 1981-02-03 | 1981-02-03 | Moving device of valve in engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1525281A JPS57129210A (en) | 1981-02-03 | 1981-02-03 | Moving device of valve in engine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17507485A Division JPS6158907A (en) | 1985-08-08 | 1985-08-08 | Movable valve device of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57129210A JPS57129210A (en) | 1982-08-11 |
| JPS6239243B2 true JPS6239243B2 (en) | 1987-08-21 |
Family
ID=11883658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1525281A Granted JPS57129210A (en) | 1981-02-03 | 1981-02-03 | Moving device of valve in engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57129210A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60228810A (en) * | 1984-04-26 | 1985-11-14 | Matsushita Electric Ind Co Ltd | Kerosene burner |
| JPH077522Y2 (en) * | 1987-02-28 | 1995-02-22 | いすゞ自動車株式会社 | Cylinder head structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5122165Y2 (en) * | 1971-09-30 | 1976-06-08 | ||
| JPS6128001Y2 (en) * | 1978-03-23 | 1986-08-20 |
-
1981
- 1981-02-03 JP JP1525281A patent/JPS57129210A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57129210A (en) | 1982-08-11 |
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