JPS6325289Y2 - - Google Patents

Info

Publication number
JPS6325289Y2
JPS6325289Y2 JP1981113918U JP11391881U JPS6325289Y2 JP S6325289 Y2 JPS6325289 Y2 JP S6325289Y2 JP 1981113918 U JP1981113918 U JP 1981113918U JP 11391881 U JP11391881 U JP 11391881U JP S6325289 Y2 JPS6325289 Y2 JP S6325289Y2
Authority
JP
Japan
Prior art keywords
rocker arm
valve
support shaft
rocker
internal combustion
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
Application number
JP1981113918U
Other languages
Japanese (ja)
Other versions
JPS5820307U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP11391881U priority Critical patent/JPS5820307U/en
Publication of JPS5820307U publication Critical patent/JPS5820307U/en
Application granted granted Critical
Publication of JPS6325289Y2 publication Critical patent/JPS6325289Y2/ja
Granted legal-status Critical Current

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  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

【考案の詳細な説明】 本考案は、内燃機関の動弁装置に関するもの
で、さらに詳しくは内燃機関の回転数に応じたロ
ツカー比となるよう自動制御できる動弁装置に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve train for an internal combustion engine, and more specifically to a valve train that can automatically control the Rocker ratio in accordance with the rotational speed of the internal combustion engine.

通常、内燃機関の動弁装置は最適な運転状況に
おいて適正な給気、或いは排気がなされるように
設計されている。従つて、低速回転においては、
下死点を過ぎて給気弁が開いていると、せつかく
シリンダ内に吸入された新気は逆流することにな
り、また、高速回転においては給気弁を早く閉じ
ると、空気は慣性を有しているものであるからシ
リンダ内に新気が十分に流入し終えない段階で給
気弁が閉じられることになるので、十分な給気が
できないという問題があつた。
Normally, a valve train for an internal combustion engine is designed to provide appropriate air supply or exhaust under optimal operating conditions. Therefore, at low speed rotation,
If the air supply valve is open after bottom dead center, the fresh air sucked into the cylinder will flow backwards. Also, at high speeds, if the air supply valve is closed too early, the air will lose inertia. Since the air supply valve is closed before a sufficient amount of fresh air has flowed into the cylinder, there is a problem in that sufficient air cannot be supplied.

一方、動弁装置のカムのプロフイルも内燃機関
の回転の全範囲にわたつて最適な状態となるよう
に形成することは難しいものである。このような
事情から、従来の内燃機関においては適正な回転
数以外では体積効率の悪い状態で運転せざるを得
ないものであつた。
On the other hand, it is difficult to form the cam profile of the valve train so that it is optimal over the entire rotation range of the internal combustion engine. Due to these circumstances, conventional internal combustion engines have been forced to operate with poor volumetric efficiency at speeds other than the appropriate rotational speed.

また、特開昭56−54909号公報には、エンジン
の回転数が所定の低回転数に低下したときに、吸
気弁軸に当接する側のロツカーアームの端部が吸
気弁軸から遠去かる方向にロツカーアームの枢軸
中心位置を変位させる機構と、前記ロツカーアー
ムの端部が吸気弁軸から遠去かる方向に変位され
たとき、ロツカーアームの前記端部と吸気弁軸と
を常時接触させるリフタ機構とから構成された吸
気リフトチエンジ装置が開示されてはいるが、こ
の装置は部品点数が多く、機構的に極めて複雑と
なり、各部の精度と調整を必要とする等の不具合
がある。
Furthermore, Japanese Patent Laid-Open No. 56-54909 discloses that when the engine speed drops to a predetermined low speed, the end of the Rocker arm that contacts the intake valve shaft moves away from the intake valve shaft. a mechanism for displacing the pivot center position of the rocker arm; and a lifter mechanism for constantly bringing the end of the rocker arm into contact with the intake valve shaft when the end of the rocker arm is displaced in a direction away from the intake valve shaft. Although such an intake lift change device has been disclosed, this device has a large number of parts, is mechanically extremely complex, and has drawbacks such as requiring precision and adjustment of each part.

本考案は、上述した従来装置の欠点を解消すべ
く創案されたものであつて、一方が押圧棒に連結
され他方が弁軸に対設されたロツカーアームを有
効利用し支持軸を移動させるだけの簡単な構造
で、ロツカー比を変化させることができる上、こ
のロツカー比の自動制御により内燃機関の全回転
範囲にわたつて体積効率を向上できる動弁装置を
提供することを目的とし、その構成は、一方が押
圧棒に連結され他方が弁軸に連結されたロツカー
アームを支持する支持軸を、ロツカーアームと一
体移動する押圧棒を介し弁軸との間の距離のみが
変化するようロツカーアームと一体移動可能に支
持すると共に、内燃機関の回転数が低い状態では
ロツカー比が小さく、回転数が高い状態ではロツ
カー比が大きくなるよう自動制御する駆動装置に
連動連結したことを特徴とするものである。
The present invention was devised to solve the above-mentioned drawbacks of the conventional device, and effectively utilizes a rocker arm, one of which is connected to a push rod and the other of which is disposed opposite to the valve shaft, to simply move the support shaft. The purpose of the present invention is to provide a valve train that has a simple structure, can change the Rocker ratio, and can improve volumetric efficiency over the entire rotation range of an internal combustion engine by automatically controlling the Rocker ratio. The support shaft that supports the rocker arm, which is connected to the pressure rod on one side and the valve stem on the other, can be moved integrally with the rocker arm so that only the distance between it and the valve stem changes via the pressure rod that moves together with the rocker arm. The present invention is characterized in that it is interlocked with a drive device that automatically controls the Rocker ratio to be small when the rotational speed of the internal combustion engine is low, and to be large when the rotational speed is high.

以下、本考案を一実施例として示す図面につい
て説明する。
Hereinafter, the drawings showing the present invention as an embodiment will be explained.

第1図は、動弁装置の要部を示す断面図で、第
2図は同平面図である。ロツカーアーム1は支持
軸2に回転自在に支持され、これの一方には調整
ねじ3が固定され、この調整ねじ3の下方は押圧
棒4の頭部の受け部に嵌入している。またロツカ
ーアーム1の他方はシリンダヘツド6に設けた給
気口6aを開閉する給気弁5の頭部を押圧するよ
う対設されている。7はシートで、これでばね8
を受けて給気弁5が常時給気口6aを閉止する方
向に弾性力を作用させている。前記押圧棒4の下
端はタペツト9に嵌入され、このタペツト9はカ
ム10に接触して駆動される。
FIG. 1 is a sectional view showing the main parts of the valve train, and FIG. 2 is a plan view thereof. The rocker arm 1 is rotatably supported by a support shaft 2, and an adjustment screw 3 is fixed to one side of the support shaft 2, and the lower part of the adjustment screw 3 is fitted into a receiving portion of the head of a pressing rod 4. The other end of the rocker arm 1 is arranged so as to press against the head of an air supply valve 5 that opens and closes an air supply port 6a provided in the cylinder head 6. 7 is the seat, and this is the spring 8
In response to this, the air supply valve 5 always applies an elastic force in a direction to close the air supply port 6a. The lower end of the pressing rod 4 is fitted into a tappet 9, and this tappet 9 is driven into contact with a cam 10.

11は軸支持部材で第3図に示すように長穴1
2があけられて支持軸2の平坦部2aを滑動自在
に支持している。
11 is a shaft support member with a long hole 1 as shown in Fig. 3.
2 is opened to slidably support the flat portion 2a of the support shaft 2.

支持軸2の端部には、連結部材13を介してシ
リンダ装置14のロツド15が連結されている。
このシリンダ装置14には、オイルパン16内の
潤滑油17をギヤポンプ18により吸引、加圧し
て供給している。
A rod 15 of a cylinder device 14 is connected to an end of the support shaft 2 via a connecting member 13.
This cylinder device 14 is supplied with lubricating oil 17 in an oil pan 16 by suction and pressurization by a gear pump 18 .

従つて、図示されてない内燃機関の回転数に応
じて変化する油圧がシリンダ装置14内に作用す
るように構成されている。
Therefore, the cylinder device 14 is configured to have a hydraulic pressure that changes depending on the rotational speed of an internal combustion engine (not shown).

機関回転数が低い状態では、ばね14bの附勢
力によつてピストン14a、ロツド15を介して
支持軸2が給気弁5側に移動されており、また機
関回転数が上昇するとそれに伴つてピストン14
aに作用する油圧が上昇するので、ばね14bに
抗して支持軸2が押圧棒4(カム10)側に移動
される。
When the engine speed is low, the support shaft 2 is moved toward the intake valve 5 side via the piston 14a and the rod 15 by the biasing force of the spring 14b, and when the engine speed increases, the piston is moved as well. 14
Since the hydraulic pressure acting on a increases, the support shaft 2 is moved toward the pressing rod 4 (cam 10) against the spring 14b.

なお、支持軸2に平坦部2aを構成したのは、
この支持軸2が円滑に支持軸2の軸線に直交した
方向に移動するためであつて、別の形式の支持機
構であつてもよい。
The flat part 2a was formed on the support shaft 2 because
The purpose is to allow the support shaft 2 to move smoothly in a direction perpendicular to the axis of the support shaft 2, and another type of support mechanism may be used.

次に作用について説明すると、内燃機関の回転
に応じてギヤポンプ18の回転が上昇するが、こ
れに応じて油圧が上昇する。この油圧は、シリン
ダ装置14のピストン14aを押圧してロツド1
5を矢印A方向に移動させる。第1図において
R1は調節ねじ3と支持軸2の中心との距離を示
し、またR2は支持軸2の中心と給気弁5の軸の
先端との距離を示す。
Next, the operation will be explained. The rotation of the gear pump 18 increases in accordance with the rotation of the internal combustion engine, and the oil pressure increases accordingly. This hydraulic pressure pushes the piston 14a of the cylinder device 14 and
5 in the direction of arrow A. In Figure 1
R 1 indicates the distance between the adjustment screw 3 and the center of the support shaft 2, and R 2 indicates the distance between the center of the support shaft 2 and the tip of the shaft of the air supply valve 5.

前述のように支持軸2が矢印A方向に移動する
とロツカーアーム1と給気弁5の軸の先端との距
離であるR2が変化する。しかし、押圧棒4は調
節ねじ3の横移動と共に移動するので距離R1
ほとんど変化しない。ロツカー比は前記距離の比
R2/R1で示されるのが、前記のように距離R1
固定され、距離R2が変化することによりロツカ
ー比が変化することになる。
As described above, when the support shaft 2 moves in the direction of the arrow A, the distance R 2 between the rocker arm 1 and the tip of the shaft of the air supply valve 5 changes. However, since the pressing rod 4 moves along with the lateral movement of the adjusting screw 3, the distance R1 hardly changes. The Rotzker ratio is the ratio of the above distances.
As described above, the distance R 1 is fixed and the Rocker ratio changes as the distance R 2 changes, which is represented by R 2 /R 1 .

一方、タペツト9を押圧するカム10のリフト
量は、一定であるので、距離R2が変化(この場
合、増加する)した分、すなわちロツカー比が増
加した分だけ給気弁5のリフト量が増加して開弁
期間が増加し、空気の慣性で遅れて流入する新気
を十分シリンダ内に供給することができる。
On the other hand, since the lift amount of the cam 10 that presses the tappet 9 is constant, the lift amount of the intake valve 5 is increased by the amount that the distance R 2 changes (in this case, increases), that is, the Rocker ratio increases. This increases the valve opening period, and it is possible to sufficiently supply fresh air, which flows in with a delay due to the inertia of the air, into the cylinder.

また、内燃機関が低速になると、シリンダ装置
14内の油圧が減少するので、ばね14bによつ
て矢印B方向にロツド15が移動し、それに伴つ
て距離R2が減少してロツカー比が小さくなる。
この距離R2の減少に伴つて給気弁5を押下げる
量が減少するので、その分だけ給気弁5が早く閉
じることになる。
Furthermore, when the internal combustion engine becomes slow, the hydraulic pressure in the cylinder device 14 decreases, so the rod 15 moves in the direction of arrow B by the spring 14b, and the distance R 2 decreases accordingly, reducing the rocker ratio. .
As the distance R 2 decreases, the amount by which the air supply valve 5 is pushed down decreases, so the air supply valve 5 closes earlier.

結局、低速においてはロツカー比が小さくなる
ので早く給気口6aを閉止することとなり、シリ
ンダに供給された新気が再び逆流するのを防止す
ることができる。また、高速回転になるとロツカ
ー比が増加するので十分な開弁時間が得られ、シ
リンダ内に十分給気することができるのである。
After all, at low speeds, the rocker ratio becomes small, so the air supply port 6a is closed quickly, and it is possible to prevent the fresh air supplied to the cylinder from flowing back again. Furthermore, when the engine rotates at high speed, the Rocker ratio increases, so a sufficient valve opening time is obtained, and sufficient air can be supplied into the cylinder.

なお、実施例においては、支持軸2を移動する
手段としてシリンダ装置14を使用したが、本考
案はこれに限定されるものではなく、内燃機関の
回転数に応じて給気弁を開閉することができるも
のであれば、機械的あるいは電気的手段を利用す
ることも差し支えない。
In addition, in the embodiment, the cylinder device 14 is used as a means for moving the support shaft 2, but the present invention is not limited to this, and the intake valve may be opened and closed according to the rotation speed of the internal combustion engine. Mechanical or electrical means may be used as long as it is possible.

これを要するに本考案による内燃機関の動弁装
置は、一方が押圧棒に連結され他方が弁軸に対設
されたロツカーアームを支持する支持軸を、ロツ
カーアームと一体移動する押圧棒を介し弁軸との
間の距離のみが変化するようにロツカーアームと
一体移動可能に支持すると共に、内燃機関の回転
数が低い状態ではロツカー比が小さく、回転数が
高い状態ではロツカー比が大きくなるよう自動制
御する駆動装置に連動連結したので、ロツカーア
ームを、ロツカーアームと一体移動する押圧棒を
介し弁軸との間の距離のみが変化するよう支持軸
と一体的に移動させることにより、ロツカー比を
変化させることができる上、この支点軸を移動さ
せることにより複数個並設したロツカーアームに
あつても同時に移動させることが簡単にでき、し
かも、ロツカーアームを支持する支持軸を、回転
数の高低に応動して自動制御する駆動装置によつ
て移動させることにより、ロツカー比を、内燃機
関の回転数に応じて自動的に最適状態に制御する
ことができる。
In short, the valve operating system for an internal combustion engine according to the present invention connects a support shaft that supports a rocker arm, one end of which is connected to a pusher rod and the other end of which is disposed opposite the valve shaft, to the valve shaft via a pusher rod that moves together with the rocker arm. The drive is supported so that it can move integrally with the Rocker arm so that only the distance between Since it is interlocked and connected to the device, the Rocker ratio can be changed by moving the Rocker arm integrally with the support shaft so that only the distance between the Rocker arm and the valve shaft changes via the push rod that moves together with the Rocker arm. Moreover, by moving this fulcrum shaft, it is possible to easily move multiple Rocker Arms installed in parallel at the same time, and the support shaft that supports the Rocker Arms can be automatically controlled in response to the high and low rotational speed. By moving it using the drive device, the rocker ratio can be automatically controlled to an optimum state according to the rotational speed of the internal combustion engine.

これにより、一方が押圧棒に連結され他方が弁
軸に対設されたロツカーアームを有効活用し支持
軸を移動させるだけの簡単な構造でロツカー比を
変化させることができる動弁装置でありながら、
このロツカー比を自動制御することにより、内燃
機関の全回転範囲にわつたて体積効率が向上する
ので、燃料の消費率を向上させることができる。
As a result, the valve train is capable of changing the rocker ratio with a simple structure of simply moving the support shaft by effectively utilizing the rocker arm, one of which is connected to the push rod and the other of which is installed opposite to the valve shaft.
By automatically controlling the rocker ratio, the volumetric efficiency is improved over the entire rotation range of the internal combustion engine, and therefore the fuel consumption rate can be improved.

したがつて、特開昭56−54909号公報の吸気弁
リフトチエンジ装置にくらべ部品点数が少なく、
構造が簡単で、極めて実用度の高い動弁装置を提
供できる。
Therefore, compared to the intake valve lift change device disclosed in JP-A-56-54909, the number of parts is smaller.
A valve train having a simple structure and extremely high practicality can be provided.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本考案の一実施例を示すものであつて、
第1図は要部の断面図、第2図は要部の平面図、
第3図はロツカーアームを支持する支持軸の軸受
部分を示す側面図である。 1……ロツカーアーム、2……支持軸、3……
調節ねじ、4……押圧棒、5……吸気弁、6……
シリンダヘツド、9……タペツト、10……カ
ム、11……軸支持部材、12……長穴、14…
…シリンダ装置。
The drawings show one embodiment of the present invention,
Figure 1 is a sectional view of the main part, Figure 2 is a plan view of the main part,
FIG. 3 is a side view showing the bearing portion of the support shaft that supports the rocker arm. 1...Rotsuker arm, 2...Support shaft, 3...
Adjustment screw, 4...Press rod, 5...Intake valve, 6...
Cylinder head, 9... Tappet, 10... Cam, 11... Shaft support member, 12... Elongated hole, 14...
...Cylinder device.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一方が押圧棒に連結され他方が弁軸に対設され
たロツカーアームを支持する支持軸を、ロツカー
アームと一体に揺動する押圧棒を介し弁軸との間
の距離のみが変化するようロツカーアームと一体
移動可能に支持すると共に、内燃機関の回転数が
低い状態ではロツカー比が小さく、回転数が高い
状態ではロツカー比が大きくなるよう自動制御す
る駆動装置に連動連結してなる内燃機関の動弁装
置。
A support shaft that supports the Rocker arm, one end of which is connected to the pressure rod and the other end of which is installed opposite the valve stem, is integrated with the Rocker arm through the pressure rod that swings together with the Rocker arm so that only the distance between it and the valve stem changes. A valve train for an internal combustion engine that is movably supported and connected to a drive device that automatically controls the Rocker ratio to be small when the internal combustion engine's rotational speed is low and to increase when the rotational speed is high. .
JP11391881U 1981-07-31 1981-07-31 Internal combustion engine valve train Granted JPS5820307U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11391881U JPS5820307U (en) 1981-07-31 1981-07-31 Internal combustion engine valve train

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11391881U JPS5820307U (en) 1981-07-31 1981-07-31 Internal combustion engine valve train

Publications (2)

Publication Number Publication Date
JPS5820307U JPS5820307U (en) 1983-02-08
JPS6325289Y2 true JPS6325289Y2 (en) 1988-07-11

Family

ID=29908206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11391881U Granted JPS5820307U (en) 1981-07-31 1981-07-31 Internal combustion engine valve train

Country Status (1)

Country Link
JP (1) JPS5820307U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2586011B (en) * 2019-07-23 2023-09-13 Hp1 Tech Limited Pressure-sensitive sheet and modular system including the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6318105A (en) * 1986-07-09 1988-01-26 Honda Motor Co Ltd Sohc type internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55151108A (en) * 1979-05-14 1980-11-25 Fujimaro Horiuchi Valve driving mechanism for internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741361Y2 (en) * 1978-05-26 1982-09-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55151108A (en) * 1979-05-14 1980-11-25 Fujimaro Horiuchi Valve driving mechanism for internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2586011B (en) * 2019-07-23 2023-09-13 Hp1 Tech Limited Pressure-sensitive sheet and modular system including the same

Also Published As

Publication number Publication date
JPS5820307U (en) 1983-02-08

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