JPS61250320A - Pressure oil feeder in valve gear with hydraulic tappet for internal-combustion engine - Google Patents
Pressure oil feeder in valve gear with hydraulic tappet for internal-combustion engineInfo
- Publication number
- JPS61250320A JPS61250320A JP9190785A JP9190785A JPS61250320A JP S61250320 A JPS61250320 A JP S61250320A JP 9190785 A JP9190785 A JP 9190785A JP 9190785 A JP9190785 A JP 9190785A JP S61250320 A JPS61250320 A JP S61250320A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- valve
- hydraulic tappet
- hydraulic
- oil supply
- 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)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
Ａ０発明の目的
（１）産業上の利用分野
本発明は内燃機関の、油圧タペ４・ノドを備えた動弁装
置の給油装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION A0 OBJECTS OF THE INVENTION (1) Industrial Field of Application The present invention relates to a lubricating system for a valve train equipped with a hydraulic tappet 4 and a throat for an internal combustion engine.
（２）従来の技術
従来内燃機関の動弁機構に油圧タペットを付設し、これ
により動弁カムと吸、排気弁間の弁間隙を調整しないで
済むようにしたものは公知である（実開昭５８−１２６
０７号公報参照）。(2) Prior art It is known that a hydraulic tappet is attached to the valve mechanism of a conventional internal combustion engine, thereby eliminating the need to adjust the valve clearance between the valve cam and the intake and exhaust valves (in practice). Showa 58-126
(See Publication No. 07).
（３）発明が解決しようとする問題点
ところでそのような油圧タペット付動弁装置では、油圧
タペットには圧油が給油系を通して供給されるが、従来
の給油系では圧油の給油源から油圧タペットまでの道程
が長くなること、機関の停止時等に給油系にエアが封入
されること等の理由により、機関の始動後、圧油が油圧
タペ、７トに供給されるまでに時間遅れを生じて油圧タ
ペ・ノドの応動性に問題があり、また前記給油系のメン
テナンスが面倒である等の問題もある。(3) Problems to be solved by the invention In such a valve train with a hydraulic tappet, pressure oil is supplied to the hydraulic tappet through an oil supply system, but in a conventional oil supply system, hydraulic oil is supplied from a pressure oil supply source. Due to reasons such as the long journey to the tappet and the fact that air is sealed in the oil supply system when the engine is stopped, there is a time delay after the engine starts until pressure oil is supplied to the hydraulic tappet. This causes problems in the responsiveness of the hydraulic tappet and throat, and there are also problems such as troublesome maintenance of the oil supply system.
本発明は上記実情にかんがみてなされたもので、機関の
始動後における油圧タペットの応動性を向上させるとと
もにその給油系のメンテナンスを高めるようにした内燃
機関の油圧タペット付動弁装置における給油装置を提供
することを目的とするものである。The present invention has been made in view of the above-mentioned circumstances, and provides a lubrication system for a valve train with a hydraulic tappet for an internal combustion engine, which improves the responsiveness of the hydraulic tappet after the engine has started, and also improves the maintenance of the lubrication system. The purpose is to provide
Ｂ０発明の構成
（ｌｉ 問題点を解決するための手段本発明によれば
、前記目的達成のため機関本体のシリンダヘッドに油圧
タペットを装着し、この油圧タペットをカムフォロアを
介して開閉弁に連接し、動弁カム軸上の動弁カムの回転
に関連して揺動する前記カムフォロアと、前記開閉弁を
閉弁方向に付勢する弁ばねとの協働により前記開閉弁を
開閉作動するようにした油圧タペット付動弁機構におい
て、前記シリンダヘッドには、前記油圧タペットに作動
油を供給するための給油系が形成され、該給油系は、シ
リンダヘッドをその長手方向に互いに略平行にのび前記
油圧タベ・ノドに連通ずる一対の縦油路と、それらの縦
油路の中央部を互いに連通ずる横油路とより平面時打字
状に形成され、前記給油系の長手方向中央部に油圧源を
連なる送油路を連通し、さらに前記一対の縦油路の両端
部にそれぞれ前記給油系内のエアを排出するためのエア
ブリードプラグを設ける。B0 Structure of the Invention (li Means for Solving Problems According to the present invention, in order to achieve the above object, a hydraulic tappet is attached to the cylinder head of the engine body, and this hydraulic tappet is connected to an on-off valve via a cam follower. The on-off valve is opened and closed by cooperation between the cam follower, which swings in relation to the rotation of the valve cam on the valve camshaft, and a valve spring, which biases the on-off valve in the valve closing direction. In the valve mechanism with a hydraulic tappet, an oil supply system for supplying hydraulic oil to the hydraulic tappet is formed in the cylinder head, and the oil supply system extends substantially parallel to each other in the longitudinal direction of the cylinder head. A pair of vertical oil passages that communicate with the hydraulic pipe and throat, and a horizontal oil passage that communicates the central portions of these vertical oil passages with each other form a stamped shape when viewed from above, and a hydraulic source is located at the longitudinal center of the oil supply system. Further, air bleed plugs are provided at both ends of the pair of vertical oil passages for discharging air within the oil supply system, respectively.
（２）作 用
前記構成によれば、給油系から油圧タペットまでの距離
を短くするとともに機関の始動時に給油系内の封入エア
の排出が能率よく確実に行われ油圧タペットへの圧油の
供給を迅速、円滑に行い該油圧タペットの応動性を高め
、さらに前記給油系メンテナンスが容易に行える。(2) Effect According to the above configuration, the distance from the oil supply system to the hydraulic tappet is shortened, and the air sealed in the oil supply system is efficiently and reliably discharged when the engine is started, thereby supplying pressure oil to the hydraulic tappet. This can be done quickly and smoothly to improve the responsiveness of the hydraulic tappet, and furthermore, the maintenance of the oil supply system can be easily performed.
（３）実施例
以下、図面により本発明の好適な実施例について説明す
る。(3) Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
ＤＯＨＣ型４サイクル内燃機関の機関本体Ｅは、。The engine body E of the DOHC type 4-stroke internal combustion engine is.
シリンダブロック１と、その上にガスケット３を介して
重合されるシリンダヘッド２とを備え、それらはヘッド
ボルト４（第４図）によって一体に結着される。It comprises a cylinder block 1 and a cylinder head 2 superimposed thereon via a gasket 3, which are joined together by head bolts 4 (FIG. 4).
機関本体Ｅのシリンダへ・ノド２は、燃焼室５と・その
燃焼室５に開口する吸、排気ポート６．７とが形成され
、それらのボート６．７は、シリンダヘッド２に昇降可
能に支持される吸、排気弁８゜９によってそれぞれ開閉
される。The throat 2 to the cylinder of the engine body E is formed with a combustion chamber 5 and intake and exhaust ports 6.7 that open to the combustion chamber 5, and these boats 6.7 can be raised and lowered to the cylinder head 2. They are opened and closed by supported intake and exhaust valves 8.9, respectively.
前記吸、排気弁８，９はそれぞれ油圧タペット１０．１
０を備えた動弁機構１１によって所定のタイミングを以
て開閉駆動される。The suction and exhaust valves 8 and 9 are each hydraulic tappet 10.1.
The opening/closing operation is performed at a predetermined timing by a valve operating mechanism 11 equipped with a valve mechanism 11 having a valve mechanism 11.
前記動弁機構１１は、シリンダへ゛ラド２の上面に形成
される動弁室１２内に設けられる。The valve operating mechanism 11 is provided within a valve operating chamber 12 formed on the upper surface of the cylinder rad 2.
前記油圧タペット１０付の動弁機構１１は従来公知の構
造を備えるもので、シリンダヘッド２の中央部に番よＶ
字状に一対め支持孔１３．１３が形成され、これらの支
持孔１３．１３に油圧タペット１０．１０がそれぞれ装
着される。各油圧タベッ）１０．１０の作動端部、すな
わちプランジャ１４．１４の球面状上端には吸、排気用
カムフォロア１５．１６の一端が連接され、それらのカ
ムフォロア１５．１６他一端は弁ばね２１．２１によっ
てそれぞれ閉弁方向に付勢される吸、排気弁８゜９の上
端に係合される。吸、排気用カムフォロア１５．１６の
中間部上面にそれぞれ形成されるスリッパ面には、一対
の動弁カム軸１７．１８の動弁カム１９．２０が圧接さ
れ、これら動弁カム１９．２０の回転と、前記弁ばね２
１．２２との協働により吸、排気弁８，９は所定のタイ
ミングで開閉作動される。吸、排気用の一対の動弁カム
軸１７．１８は、シリンダへ・ノド２上の軸受半部２３
．２４とその上に固着される軸受キャ・ノブ２５゜２６
とで形成される軸受２７，２Ｂによってそれぞれ回転自
在に支承される。The valve mechanism 11 with the hydraulic tappet 10 has a conventionally known structure, and has a number V in the center of the cylinder head 2.
A pair of support holes 13.13 are formed in the shape of a letter, and hydraulic tappets 10.10 are respectively installed in these support holes 13.13. One end of a suction/exhaust cam follower 15.16 is connected to the operating end of each hydraulic tube (10.10), that is, the spherical upper end of the plunger 14.14, and the other end of the cam follower 15.16 is connected to a valve spring 21.16. 21 are engaged with the upper ends of the intake and exhaust valves 8 and 9, respectively, which are biased in the valve closing direction. The valve drive cams 19.20 of a pair of valve drive cam shafts 17.18 are pressed against the slipper surfaces formed on the upper surfaces of the intermediate portions of the intake and exhaust cam followers 15.16. Rotation and said valve spring 2
1.22, the intake and exhaust valves 8 and 9 are opened and closed at predetermined timing. A pair of valve drive camshafts 17 and 18 for intake and exhaust are connected to the cylinder by bearing halves 23 on the throat 2.
．． 24 and the bearing can knob 25°26 fixed thereon.
They are each rotatably supported by bearings 27 and 2B formed by.
シリンダヘッド２には、前記油圧タペット１０゜１０に
圧油を供給するための給油系り、と、動弁カム軸１７．
１８の軸受部に圧油を供給するための潤滑油系Ｌ２とが
上下に間隔を存して略水平に、並設される。The cylinder head 2 includes an oil supply system for supplying pressure oil to the hydraulic tappets 10, 10, and a valve drive camshaft 17.
A lubricating oil system L2 for supplying pressure oil to the 18 bearings is arranged substantially horizontally in parallel with an interval above and below.
第４図に示すように前記給油系Ｌ＋ と潤滑油系Ｌ２は
、シリンダヘッド２を上下方向に穿設されテ前記ヘッド
ボルト４の通し孔を兼ねる送油路３５に連通され、この
送油路３５の下端は、シリンダブロック１に穿設したプ
ロ・ツク側油路３６を介して図示しない油圧ポンプに連
通されており、油圧ポンプからの圧油はブロック側油路
３６および送油路３５を介して前記給油系層と潤滑油系
Ｌ２とに分配給油される。As shown in FIG. 4, the oil supply system L+ and the lubricant system L2 are communicated with an oil feed passage 35 that is vertically bored in the cylinder head 2 and also serves as a through hole for the head bolt 4. The lower end of 35 is communicated with a hydraulic pump (not shown) via a pro-tsuku side oil passage 36 bored in the cylinder block 1, and the pressure oil from the hydraulic pump flows through the block side oil passage 36 and the oil feed passage 35. The oil is distributed to the oil supply system layer and the lubricating oil system L2 through the oil supply system layer.
次に主に第３．４図を参照して前記給油系Ｌ＋の構成を
説明する。前記給油系Ｌ１は、シリンダへラド２の長手
方向に略水平にのびる２条の縦油路２９．，２９□と、
それらの縦油路２９１．２９□の中央部を互いに連通ず
る略水平な横油路３０とより平面略Ｈ字状に形成されて
おり、一方の縦油路２９．の中央部は前記横油路３４の
延長線上にのびる油路３１を介して前記送油路３５に連
通される。Next, the configuration of the oil supply system L+ will be explained mainly with reference to FIG. 3.4. The oil supply system L1 includes two vertical oil passages 29. which extend substantially horizontally in the longitudinal direction of the rad 2 to the cylinder. , 29□ and
The center portions of these vertical oil passages 291.29□ are formed into a substantially H-shape in plan with a substantially horizontal horizontal oil passage 30 communicating with each other, and one vertical oil passage 29. A central portion thereof is communicated with the oil feed passage 35 via an oil passage 31 extending on an extension line of the horizontal oil passage 34.
前記一対の縦油路２９．，２９□は、それぞれ複数の前
記支持孔１３を横切るようにして該支持孔１３に連通さ
れる。また一対の縦油路２９１゜２９□の両端は、シリ
ンダヘッド２の左、右端壁にそれぞれ開口しており、そ
れらの開口端は盲栓４６によって閉じられる。また第５
図に示すように一対の縦油路２９．，２９□の両端部近
傍には、それぞれ動弁室１２内に開口するエアブリード
通路４７・・・が連通され、各エアブリード通路４７に
それぞれエアブリードプラグ４１が螺着される。The pair of vertical oil passages 29. , 29□ are connected to the support holes 13 so as to cross the plurality of support holes 13, respectively. Further, both ends of the pair of vertical oil passages 291° and 29□ are open in the left and right end walls of the cylinder head 2, respectively, and these open ends are closed by blind plugs 46. Also the fifth
As shown in the figure, a pair of vertical oil passages 29. , 29□ are communicated with air bleed passages 47 that open into the valve operating chamber 12, and air bleed plugs 41 are screwed into each air bleed passage 47, respectively.
エアブリードプラグ４１に穿設されるブリード孔４８の
入口は、複数箇所においてエアブリード通路４７内に開
口し、その出口は動弁室内１２に開口される。The entrance of the bleed hole 48 formed in the air bleed plug 41 opens into the air bleed passage 47 at a plurality of locations, and the exit thereof opens into the valve train chamber 12.
前記油路３１には第１オリフイス３７が挿入されており
、この油路３１よりＨ字状給油系Ｌ１に送られる圧油は
、この第１オリフイス２７によってその油量が制御され
る。A first orifice 37 is inserted into the oil passage 31, and the amount of pressure oil sent from this oil passage 31 to the H-shaped oil supply system L1 is controlled by the first orifice 27.
またＨ字状給油系Ｌｌの他方の縦油路２９□の途中には
、リリーフ弁４２が挿入される。このリリーフ弁４２は
リリーフ孔４３を開閉するピストン４４と、このピスト
ン４４をリリーフ孔４２の閉方向に付勢する弁ばね４５
とより構成される。Further, a relief valve 42 is inserted in the middle of the other vertical oil passage 29□ of the H-shaped oil supply system Ll. This relief valve 42 includes a piston 44 that opens and closes the relief hole 43, and a valve spring 45 that biases the piston 44 in the closing direction of the relief hole 42.
It consists of
前記潤滑油系ｔ、ｚは、第４図に示すように潤滑油路３
２＋、３２＋ と、これらを連通する連通油路３３とを
備えており、この潤滑油系Ｌ２は油路３４を介して前記
送油路３５に連通される。油路３４には、第２オリフイ
ス３５が挿入されており、潤滑油系Ｌ２に供給される圧
油の油量は、この第２オリフイス３５によって制御され
る。前記潤滑油路３２．．３２□は第２図に示すように
分岐潤滑油路４９．４９を介して動弁カム軸１７．．１
８を各軸受２７，２８の軸受面に連通される。The lubricating oil systems t and z are connected to the lubricating oil passage 3 as shown in FIG.
2+, 32+, and a communicating oil passage 33 that communicates these, and this lubricating oil system L2 is communicated with the oil feed passage 35 via an oil passage 34. A second orifice 35 is inserted into the oil passage 34, and the amount of pressure oil supplied to the lubricating oil system L2 is controlled by the second orifice 35. The lubricating oil passage 32. ．． 32□ is connected to the valve drive camshaft 17 through branch lubricating oil passages 49 and 49 as shown in FIG. ．． 1
8 is communicated with the bearing surface of each bearing 27, 28.
前記第１．第２オリフィス３７．３８は、その一端面が
油路３１および３４にそれぞれ形成した段部３９，４０
に係合し、またそれらの他端が送油路３５を通るヘッド
ボルト４に対面して位置決めされる。Said 1st. The second orifice 37, 38 has step portions 39, 40 formed at one end surface in the oil passages 31 and 34, respectively.
The other end thereof is positioned facing the head bolt 4 passing through the oil feed passage 35.
次にこの実施例の作用について説明する。Next, the operation of this embodiment will be explained.
いま機関の運転により一対の動弁カム軸１７゜１８が回
転されれば、吸、排気カム１９．．２０の回転と、弁ば
ね２１，２２の弾発力とによりカムフォロア１５．１６
は油圧タペット１０，１０との連接部を支点として上下
に揺動し、吸、排気弁８．９を上下に摺動して吸、排気
ポート６．７は所定のタイミングで開閉される。If the pair of valve drive camshafts 17°18 are now rotated by engine operation, the intake and exhaust cams 19. ．． 20 and the elastic force of the valve springs 21 and 22, the cam follower 15.16
swings up and down about the connecting portion with the hydraulic tappets 10, 10 as a fulcrum, and slides the intake and exhaust valves 8.9 up and down to open and close the intake and exhaust ports 6.7 at predetermined timing.
また機関の運転により駆動される油圧ポンプからの圧油
の一部は、ブロック側油路３６から送油路３５に流れる
。送油路３５内の圧油は油路３１．３４とに分流され、
油路３１内の圧油は、第１オリフイス３７を通ってＨ字
状給油系Ｌ１の一対の縦油路２９．，２９□に分流し、
そこから支持孔１３．１３を通って油圧タペット１０．
１０の給油孔に給油される。油圧タペット１０．１０は
従来公知の構造のもので圧油をうけて作動され、その上
端のプランジャ１４．１４の上端がカムフォロア１５．
１６の基端にそれぞれ圧接され、前述の動弁作動が円滑
に行われる。一方油路３４内の圧油は第２オリフィス３
日を通って潤滑油路３２３．３２□へと流れ、そこから
分岐油潤滑油路４９．４９を通って動弁カム軸１７．１
８の軸受２７．２８に給油される。Further, a part of the pressure oil from the hydraulic pump driven by the operation of the engine flows from the block side oil passage 36 to the oil feed passage 35. The pressure oil in the oil feed path 35 is divided into oil paths 31 and 34,
Pressure oil in the oil passage 31 passes through the first orifice 37 to the pair of vertical oil passages 29. of the H-shaped oil supply system L1. , 29□,
From there it passes through the support hole 13.13 and the hydraulic tappet 10.
Oil is supplied through 10 oil supply holes. The hydraulic tappet 10.10 has a conventionally known structure and is operated by receiving pressure oil, and the upper end of the plunger 14.14 is connected to the cam follower 15.10.
16, and the above-mentioned valve operating operation is performed smoothly. On the other hand, the pressure oil in the oil passage 34 flows through the second orifice 3
The oil flows through the lubricating oil passage 323.32□ and from there through the branch oil lubricating oil passage 49.49 to the valve drive camshaft 17.1.
8 bearings 27 and 28 are lubricated.
ところで第３図に示すようにＨ字状をなす給油系り、に
は、その縦方向中央部に送油路３５が連通されることに
より、この送油路３５から給油系Ｌ１の各端部までの距
離を等しく、しかも短くすることができ、したがって送
油路３５から最遠部の油圧タペット１０への距離を短く
してそこへの圧油の到達時間を短縮することができる。By the way, as shown in FIG. 3, the H-shaped oil supply system is connected to the oil supply passage 35 in the longitudinal center thereof, so that the oil supply passage 35 is connected to each end of the oil supply system L1. Therefore, the distance from the oil feed path 35 to the farthest hydraulic tappet 10 can be shortened, and the time it takes for pressure oil to reach there can be shortened.
またＨ字状給油系Ｌ１の四つの端部にそれぞれエアブリ
ードプラグ４１が設けられることにより該給油系り、中
を流れる圧油中に混入するエアは前記四つのエアブリー
ドプラグ４１を通って動弁室１２へと排出することがで
き、機関の新組後の始動時や、その長時間停止後の再始
動時の如く給油系Ｌ１内に比較的多くのエアが封入され
てもそれらの封入エアは前記四つのエアブリードプラグ
４１を通って動弁室１２へと容易に排出される。In addition, air bleed plugs 41 are provided at each of the four ends of the H-shaped oil supply system L1, so that air mixed in the pressure oil flowing through the oil supply system moves through the four air bleed plugs 41. It can be discharged to the valve chamber 12, and even if a relatively large amount of air is sealed in the oil supply system L1, such as when starting the engine after a new assembly or when restarting after a long stop, it can be discharged to the valve chamber 12. Air is easily discharged into the valve operating chamber 12 through the four air bleed plugs 41.
なお、各エアブリードプラグ４１がエアとともに動弁室
１２に排出された油は機関本体Ｅに設けた図示しない戻
し通路を通って油溜に戻される。Note that the oil discharged into the valve train chamber 12 together with air by each air bleed plug 41 is returned to the oil reservoir through a return passage (not shown) provided in the engine body E.
Ｃ０発明の効果
以上の実施例により明らかなように、本発明によれば、
油圧タペット付動弁機構において、シリンダヘッドには
、油圧タペットに作動油を供給するための給油系が形成
され、該給油系は、シリンダヘッドをその長手方向に互
いに略平行にのび前記油圧タペットに連通ずる一対の縦
油路と、それらの縦油路の中央部を互いに連通ずる横油
路とより平面略Ｈ字状に形成され、前記給油系の長手方
向中央部に油圧源を連なる送油路を連通し、さらに前記
一対の縦油路の両端部にそれぞれ前記給油系内のエアを
排出するためのエアブリードプラグを設けたので、送油
路を流れる圧油は給油系を通って油圧タペットに迅速に
供給されると共に該給油系中の混入エアは接糸の四つの
端部に設けられるエアブリードプラグより迅速かつ確実
に排出され、機関の新組後の始動時、機関停止後の再始
動時にも油圧源からの圧油を迅速、且つ確実に油圧タペ
ットに給油することができ、該油圧タペットの応動性を
大幅に高めること４ができる。Effects of C0 Invention As is clear from the above examples, according to the present invention,
In the valve mechanism with a hydraulic tappet, an oil supply system for supplying hydraulic oil to the hydraulic tappet is formed in the cylinder head, and the oil supply system extends approximately parallel to each other in the longitudinal direction of the cylinder head to the hydraulic tappet. The oil supply system is formed into a substantially H-shape in plan by a pair of vertical oil passages that communicate with each other and a horizontal oil passage that communicates the central portions of these vertical oil passages with each other, and has a hydraulic power source connected to the longitudinal center portion of the oil supply system. Since air bleed plugs are provided at both ends of the pair of vertical oil passages for discharging the air in the oil supply system, the pressure oil flowing through the oil supply passage passes through the oil supply system and increases the hydraulic pressure. In addition to being quickly supplied to the tappet, the air mixed in the oil supply system is quickly and reliably discharged from the air bleed plugs provided at the four ends of the suction thread, and when starting the engine after a new assembly or after stopping the engine. Pressure oil from the hydraulic source can be quickly and reliably supplied to the hydraulic tappet even at restart, and the responsiveness of the hydraulic tappet can be greatly improved.
また前記エアブリードプラグは、シリンダヘッドを機関
本体から外さず給油系から分離することができ、該プラ
グや給油系の清掃等のメンテナンスを簡単容易に行なえ
る。Further, the air bleed plug can be separated from the oil supply system without removing the cylinder head from the engine body, and maintenance such as cleaning of the plug and the oil supply system can be easily performed.
図面は本発明装置の一実施例を示すもので、第１図は本
発明装置を備えた機関本体の動弁機構部分を示す縦断面
図、第２図は前記機関本体の動弁カム軸の軸受部の縦断
面図、第３図は第１図ｍ−■線機断面図、第４図は第３
図ＩＶ−ＩＶ線に沿う拡大断面図、第５図は第３図Ｖ−
Ｖ線に沿う拡大断面図である。The drawings show an embodiment of the device of the present invention, and FIG. 1 is a longitudinal cross-sectional view showing a valve mechanism portion of an engine body equipped with the device of the present invention, and FIG. 2 is a view of a valve camshaft of the engine body. A vertical cross-sectional view of the bearing part, Figure 3 is a cross-sectional view of the machine along the line m-■ in Figure 1, and Figure 4 is a cross-sectional view of the
An enlarged sectional view along the line IV-IV, Figure 5 is Figure 3 V-
It is an enlarged sectional view along the V line.
Claims (1)
の油圧タペットをカムフォロアを介して開閉弁に連接し
、動弁カム軸上の動弁カムの回転に関連して揺動する前
記カムフォロアと、前記開閉弁を閉弁方向に付勢する弁
ばねとの協働により前記開閉弁を開閉作動するようにし
た油圧タペット付動弁機構において、前記シリンダヘッ
ドには、前記油圧タペットに作動油を供給するための給
油系が形成され、該給油系は、シリンダヘッドをその長
手方向に互いに略平行にのび前記油圧タペットに連通す
る一対の縦油路と、それらの縦油路の中央部を互いに連
通する横油路とより平面略Ｈ字状に形成され、前記給油
系の長手方向中央部に油圧源を連なる送油路を連通し、
さらに前記一対の縦油路の両端部にそれぞれ前記給油系
内のエアを排出するためのエアブリードプラグを設けた
ことを特徴とする内燃機関の油圧タペット付動弁機構に
おける給油装置。A hydraulic tappet is attached to the cylinder head of the engine body, and this hydraulic tappet is connected to the opening/closing valve via a cam follower, and the cam follower swings in relation to the rotation of the valve driving cam on the valve driving cam shaft, and the opening/closing valve is connected to the opening/closing valve. In the valve operating mechanism with a hydraulic tappet that opens and closes the opening/closing valve in cooperation with a valve spring that biases the valve in the valve closing direction, the cylinder head includes a valve mechanism for supplying hydraulic oil to the hydraulic tappet. The oil supply system includes a pair of vertical oil passages that extend substantially parallel to each other in the longitudinal direction of the cylinder head and communicate with the hydraulic tappet, and a horizontal oil passage that communicates the central portions of these vertical oil passages with each other. an oil supply passage formed into a substantially H-shape in plan and connected to a hydraulic power source in the longitudinal center portion of the oil supply system;
The oil supply device for a valve mechanism with a hydraulic tappet for an internal combustion engine, further comprising air bleed plugs for discharging air in the oil supply system at both ends of the pair of vertical oil passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190785A JPS61250320A (en) | 1985-04-29 | 1985-04-29 | Pressure oil feeder in valve gear with hydraulic tappet for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190785A JPS61250320A (en) | 1985-04-29 | 1985-04-29 | Pressure oil feeder in valve gear with hydraulic tappet for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61250320A true JPS61250320A (en) | 1986-11-07 |
Family
ID=14039647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9190785A Pending JPS61250320A (en) | 1985-04-29 | 1985-04-29 | Pressure oil feeder in valve gear with hydraulic tappet for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61250320A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960478A1 (en) * | 2014-06-25 | 2015-12-30 | Toyota Jidosha Kabushiki Kaisha | Camshaft bearing structure |
-
1985
- 1985-04-29 JP JP9190785A patent/JPS61250320A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960478A1 (en) * | 2014-06-25 | 2015-12-30 | Toyota Jidosha Kabushiki Kaisha | Camshaft bearing structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61261612A (en) | Oil feeder of tappet mechanism equipped with hydraulic tappet for internal-combustion engine | |
| EP0259106B1 (en) | Valve operating apparatus in an internal combustion engine | |
| EP0212981B1 (en) | Oil supply system for a valve operating mechanism in internal combustion engines | |
| US5186129A (en) | Intermittent oiling system for an internal combustion engine camshaft and valve train | |
| US6289861B1 (en) | Control for variable valve timing | |
| US5161495A (en) | Lubrication arrangement for engine | |
| US5913293A (en) | Oil passage structure for engine | |
| JP2829866B2 (en) | Lubrication system for 4-cycle engine | |
| USRE35382E (en) | Lubrication arrangement for engine | |
| JPS61250320A (en) | Pressure oil feeder in valve gear with hydraulic tappet for internal-combustion engine | |
| JPH0246766B2 (en) | ||
| JPH0476008B2 (en) | ||
| JPH0248648Y2 (en) | ||
| KR20110126523A (en) | Engine camshaft cover with integrated oil passages for camshaft phaser actuation | |
| JP3358960B2 (en) | SOHC type internal combustion engine | |
| JPS61261614A (en) | Oil feeder of tappet mechanism equipped with hydraulic tappet for internal-combustion engine | |
| JP3133983B2 (en) | Lubrication system for 4-cycle engine | |
| JPH0716004Y2 (en) | Cylinder head of multi-cylinder engine | |
| JPS61250321A (en) | Valve gear-cum-hydraulic tappet device for internal-combustion engine | |
| JPS6251710A (en) | Device of feeding oil to hydraulic tappet | |
| JPS6339363Y2 (en) | ||
| JP2717292B2 (en) | 4 cycle vertical shaft engine | |
| JPS61250322A (en) | Pressure oil feeder in valve gear for internal-combustion engine | |
| JPH0732884Y2 (en) | Lubricating oil passage for V-type engine | |
| JP2627175B2 (en) | DOHC engine lubrication system |