JPH0338403Y2 - - Google Patents
Info
- Publication number
- JPH0338403Y2 JPH0338403Y2 JP5789985U JP5789985U JPH0338403Y2 JP H0338403 Y2 JPH0338403 Y2 JP H0338403Y2 JP 5789985 U JP5789985 U JP 5789985U JP 5789985 U JP5789985 U JP 5789985U JP H0338403 Y2 JPH0338403 Y2 JP H0338403Y2
- Authority
- JP
- Japan
- Prior art keywords
- passage
- oil
- hydraulic
- distribution
- cylinder head
- 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
- 238000009826 distribution Methods 0.000 claims description 25
- 230000002265 prevention Effects 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 230000001050 lubricating effect Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 35
- 230000000630 rising effect Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
Ａ 考案の目的
(1) 産業上の利用分野
本考案は、内燃機関の油圧タペツトへの給油装
置、特に、動弁装置の複数の油圧タペツトの各給
油口に連通して略水平に延びる分配路と、この分
配路の入口から立上る逆流止め通路と、機関のオ
イルポンプの吐出口から上方へ延出される供給路
と、この供給路及び前記逆流止め通路の各上端間
を接続する連通路とを備えたものの改良に関す
る。[Detailed explanation of the invention] A. Purpose of the invention (1) Industrial application field The present invention is a system for supplying oil to the hydraulic tappets of an internal combustion engine, in particular, a system for supplying oil to the hydraulic tappets of a valve train. a distribution passage extending substantially horizontally; a backflow prevention passage rising from an inlet of the distribution passage; a supply passage extending upward from a discharge port of an oil pump of the engine; and upper ends of the supply passage and the backflow prevention passage; This invention relates to an improvement in a device equipped with a communication path connecting between the two.
(2) 従来の技術
前記逆流止め通路は、機関の運転を停止したと
き、それに伴うオイルポンプの作動停止により、
油圧タペツトに分配すべき作動油が分配路からオ
イルポンプ側へ流下していくのを防止し、機関の
再始動時、油圧タペツトへの作動油の分配を直ち
に再開可能にするためのものである。(2) Prior art When the engine stops operating, the backflow prevention passage prevents the oil pump from operating.
This is to prevent the hydraulic oil to be distributed to the hydraulic tappets from flowing down from the distribution path to the oil pump side, and to enable the distribution of hydraulic oil to the hydraulic tappets to be resumed immediately when the engine is restarted. .
(3) 考案が解決しようとする問題点
ところで、従来のかかる給油装置では、分配
路、逆流止め通路、連通路及び供給路をすべて機
関のシリンダヘツドにドリル加工により穿設し、
その後、各通路の加工口には盲栓を施さなければ
ならないため、製作に手間がかかる欠点がある。(3) Problems to be solved by the invention By the way, in the conventional oil supply system, the distribution passage, backflow prevention passage, communication passage and supply passage are all drilled into the cylinder head of the engine.
Thereafter, blind plugs must be provided at the processing openings of each passage, which has the drawback of requiring time and effort to manufacture.
そこで、本考案は、ドリル加工部を少なくする
と共に盲栓の使用個数を減らすことができ、した
がつて構造が簡単で製作が容易な前記給油装置を
提供することを目的とする。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an oil supply device that can reduce the number of drilled parts and the number of blind plugs used, and is therefore simple in structure and easy to manufacture.
Ｂ 考案の構成
(1) 問題点を解決するための手段
上記目的を達成するために、本考案は、動弁装
置の複数の油圧タペツトの各給油口に連通して略
水平に延びる分配路と、この分配路の入口から立
上る逆流止め通路と、機関のオイルポンプの吐出
口から上方へ延出される供給路と、この供給路及
び前記逆流止め通路の各上端間を接続する連通路
とを備えた、内燃機関の油圧タペツトへの給油装
置において、前記分配路、供給路及び逆流止め通
路をシリンダヘツドに穿設し、動弁装置のカム軸
を挟持すべく相互に接合されるシリンダヘツド及
びカムホルダの接合面の少なくともいずれか一方
に前記連通路としての凹部を形成したことを特徴
とする。B. Structure of the device (1) Means for solving the problems In order to achieve the above object, the present invention includes a distribution passage extending approximately horizontally and communicating with each oil supply port of a plurality of hydraulic tappets of a valve train. , a backflow prevention passage rising from the inlet of the distribution passage, a supply passage extending upward from the discharge port of the oil pump of the engine, and a communication passage connecting the upper ends of this supply passage and the respective upper ends of the said backflow prevention passage. A system for supplying oil to a hydraulic tappet of an internal combustion engine, wherein the distribution passage, the supply passage, and the check passage are bored in a cylinder head, and the cylinder head and The cam holder is characterized in that a recessed portion serving as the communication path is formed on at least one of the joint surfaces of the cam holder.
(2) 作用
機関の停止によりオイルポンプの作動が停止す
れば、凹部及び供給路内の油はオイルポンプ側へ
流下していくが、分配路内の油は、その入口から
立上る逆流止め通路によりオイルポンプ側への逆
流を阻止される。(2) Effect When the oil pump stops operating due to the engine stopping, the oil in the recess and the supply channel flows down toward the oil pump, but the oil in the distribution channel flows through the backflow prevention channel rising from the inlet. This prevents backflow to the oil pump side.
逆流止め通路及び供給路間を接続する連通路と
しての凹部は、シリンダヘツド及びカムホルダの
接合面の少なくともいずれか一方に形成されるの
で、シリンダヘツドまたはカムホルダの鋳造時に
その形成が可能であり、したがつてそのためのド
リル加工も盲栓も不要である。 Since the concave portion serving as a communication path connecting the backflow prevention passage and the supply passage is formed on at least one of the joint surfaces of the cylinder head and the cam holder, it can be formed at the time of casting the cylinder head or the cam holder. Therefore, there is no need for drilling or blind plugs.
(3) 実施例
以下、図面により本考案の一実施例について説
明すると、第１図において、内燃機関のシリンダ
ブロツク１には、紙面の表裏方向に配列される複
数のシリンダ２が形成され、またシリンダブロツ
ク１の上端に結着されるシリンダヘツド３には、
複数のシリンダ２に対応する複数の燃焼室４と、
各燃焼室４に開口する吸（排）気ポート５とが形
成され、吸（排）気ポート５は吸（排）気弁６に
より開閉される。弁６は、シリンダヘツド３に弁
ガイド７を介して昇降自在に支承され、動弁装置
８により駆動される。(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a cylinder block 1 of an internal combustion engine is formed with a plurality of cylinders 2 arranged in the front and back directions of the paper. The cylinder head 3 attached to the upper end of the cylinder block 1 includes:
a plurality of combustion chambers 4 corresponding to the plurality of cylinders 2;
An intake (exhaust) port 5 opening into each combustion chamber 4 is formed, and the intake (exhaust) port 5 is opened and closed by an intake (exhaust) valve 6. The valve 6 is supported by the cylinder head 3 via a valve guide 7 so as to be able to move up and down, and is driven by a valve train 8.
動弁装置８は、弁６の上端に付設されたリテー
ナ６ａとシリンダヘツド３との間に縮設されて弁
６を閉じ方向に付勢する弁ばね９と、シリンダヘ
ツド３の支持孔１０に装着される油圧タペツト１
１と、この油圧タペツト１１の作動端１１ａに基
端部を揺動自在に支承されて先端部を弁９の頭部
に係合させるカムフオロワ１２と、このカムフオ
ロワ１２の上側に形成されたスリツパ面１２ａに
カム１３ａを係合させるカム軸１３とより構成さ
れる。 The valve train 8 includes a valve spring 9 that is compressed between a retainer 6a attached to the upper end of the valve 6 and the cylinder head 3 and biases the valve 6 in the closing direction, and a support hole 10 of the cylinder head 3. Hydraulic tappet 1 to be installed
1, a cam follower 12 whose base end is swingably supported by the operating end 11a of the hydraulic tappet 11 and whose distal end engages with the head of the valve 9; and a slipper surface formed on the upper side of the cam follower 12. 12a and a cam shaft 13 that engages a cam 13a.
上記動弁装置８は、シリンダヘツド３上に形成
された動弁室１４に収容され、該室１４の上方開
口部はヘツドカバー１５によつて閉鎖されてい
る。 The valve train 8 is housed in a valve train chamber 14 formed on the cylinder head 3, and the upper opening of the chamber 14 is closed by a head cover 15.
而して、カム軸１３の回転に伴い、カム１３ａ
がそのリフト作用によりカムフオロワ１２のスリ
ツパ面１２ａに押圧力を加えると、油圧タペツト
１１は、その内部の油圧室に発生する油圧により
踏張つてカムフオロワ１２の基端を支える結果、
カムフオロワ１２は、油圧タペツト１１の作動端
１１ａを支点として、カム１３ａにより下方へ揺
動され、弁ばね９の弾発力に抗して弁６を開く。
この間、油圧タペツト１１内の油圧室からは作動
油が僅かに漏洩する。次に、カム１３ａがカムフ
オロワ１２に対するリフト作用を解除すると、弁
ばね９が弁６をカムフオロワ１２と共に押上げて
閉弁位置に戻す。このとき、油圧タペツト１１は
伸長機能を発揮して弁頭間隙を排除する。このよ
うな油圧タペツト１１の伸長作用に伴い、その内
部の油圧室が減圧すれば、後述の分配路２２から
該油圧室に作動油が補給される。 Therefore, as the camshaft 13 rotates, the cam 13a
When the tappet 11 applies a pressing force to the slipper surface 12a of the cam follower 12 by its lifting action, the hydraulic tappet 11 supports the base end of the cam follower 12 by supporting the base end of the cam follower 12 by the hydraulic pressure generated in the internal hydraulic chamber.
The cam follower 12 is swung downward by a cam 13a with the operating end 11a of the hydraulic tappet 11 as a fulcrum, and opens the valve 6 against the elastic force of the valve spring 9.
During this time, a small amount of hydraulic fluid leaks from the hydraulic chamber in the hydraulic tappet 11. Next, when the cam 13a releases its lifting action on the cam follower 12, the valve spring 9 pushes up the valve 6 together with the cam follower 12 to return it to the closed position. At this time, the hydraulic tappet 11 exhibits an extension function to eliminate the valve head gap. When the pressure in the hydraulic chamber inside the hydraulic tappet 11 is reduced due to the extension of the hydraulic tappet 11, hydraulic oil is supplied to the hydraulic chamber from a distribution path 22, which will be described later.
第２図及び第３図において、前記カム軸１３
は、複数の前記シリンダ２の配列方向に沿つて水
平に配置される。このカム軸１３の支持のため
に、シリンダヘツド３の上面に半円形の軸受面１
６ａを有する複数の軸受台１６が一体に形成され
ると共に、同じく半円形の軸受面１７ａを有する
複数のカムホルダ１７が用意され、両軸受面１６
ａ，１７ａによりカム軸１３のジヤーナルを回転
自在に挟持するようにカムホルダ１７が軸受台１
６にボルト１８により固着される。 In FIGS. 2 and 3, the camshaft 13
are arranged horizontally along the direction in which the plurality of cylinders 2 are arranged. To support this camshaft 13, a semicircular bearing surface 1 is provided on the upper surface of the cylinder head 3.
A plurality of cam holders 17 having semicircular bearing surfaces 17a are also prepared, and both bearing surfaces 16 are integrally formed.
The cam holder 17 is mounted on the bearing stand 1 so that the journal of the camshaft 13 is rotatably held between the a and 17a.
6 with bolts 18.
第２図で右端に位置する一対の軸受台１６及び
カムホルダ１７は、第３図に示すように、互いに
密着し得る側方凸部１９及び２０をそれぞれ一体
に備えている。 As shown in FIG. 3, the pair of bearing pedestals 16 and cam holder 17 located at the right end in FIG. 2 are each integrally provided with lateral convex portions 19 and 20 that can be brought into close contact with each other.
前記油圧タペツト１１及びカムフオロワ１２
は、それぞれ前記弁６の使用本数と同数水平方向
に配設され、各油圧タペツト１１の給油口２１に
連通するように水平に延びる分配路２２がシリン
ダヘツド３に、それを貫通するようにドリル加工
により穿設され、分配路２２の両端にはこれらを
閉塞すべく盲栓２３が施される。 Said hydraulic tappet 11 and cam follower 12
The distribution passages 22 are arranged horizontally in the same number as the number of valves 6 used, and are drilled so as to penetrate through the cylinder head 3. The distribution passages 22 extend horizontally so as to communicate with the oil supply ports 21 of the respective hydraulic tappets 11. The holes are formed by processing, and blind plugs 23 are provided at both ends of the distribution channel 22 to close them.
また、シリンダヘツド３には、分配路２２の入
口２２ａから立上る逆流止め通路２４と、機関の
オイルポンプ２５の吐出口から上方に延出される
供給路２６とが同じくドリル加工により穿設さ
れ、供給路２６にはオリフイス２７が設けられ
る。 Further, in the cylinder head 3, a backflow prevention passage 24 rising from the inlet 22a of the distribution passage 22 and a supply passage 26 extending upward from the discharge port of the oil pump 25 of the engine are similarly drilled. An orifice 27 is provided in the supply path 26 .
逆流止め通路２４及び供給路２６の上端は、互
いに近接して前記軸受台１６の側方凸部１９上面
に開口させる。またその上面には、両通路２４，
２６間を連通する凹部２８と、この凹部２８を動
弁室１４に連通するオリフイス溝２９とが設けら
れ、これら２８，２９はシリンダヘツド３の鋳造
時、鋳型により形成されるものである。したがつ
て、凹部２８及びオリフイス溝２９の上方開放面
は、前記カムホルダ１７の側方凸部２０の下面に
より閉鎖される。 The upper ends of the backflow prevention passage 24 and the supply passage 26 are opened on the upper surface of the side convex portion 19 of the bearing stand 16 in close proximity to each other. Also, on the top surface, both passages 24,
26, and an orifice groove 29 that communicates the recess 28 with the valve operating chamber 14. These 28 and 29 are formed by a mold when the cylinder head 3 is cast. Therefore, the upper open surfaces of the recess 28 and the orifice groove 29 are closed by the lower surface of the side protrusion 20 of the cam holder 17.
尚、凹部２８及びオリフイス溝２９は、上方の
側方凸部２０下面に設けても、また上下両方の側
方凸部１９，２０に設けてもよい。 The recess 28 and the orifice groove 29 may be provided on the lower surface of the upper lateral protrusion 20, or may be provided on both the upper and lower lateral protrusions 19, 20.
次にこの実施例の作用を説明する。機関が始動
されると、オイルポンプ２５の作動により、その
吐出口から吐出される油はオリフイス２７で流量
を調整されながら供給路２６、凹部２８及び逆流
止め通路２４を順次経て分配路２２へ送られ、そ
こから複数の油圧タペツト１１の各給油口２１へ
分配される。この間、供給路２６を上昇していく
油に気泡が含まれていれば、その気泡は凹部２８
から僅かな油と共にオリフイス溝２９を通して動
弁室１４へ排出される。 Next, the operation of this embodiment will be explained. When the engine is started, the oil pump 25 is activated, and the oil discharged from its discharge port is sent to the distribution path 22 through the supply path 26, the recess 28, and the backflow prevention path 24 in sequence, with the flow rate being adjusted by the orifice 27. The oil is then distributed from there to each oil filler port 21 of the plurality of hydraulic tappets 11. During this time, if the oil rising through the supply path 26 contains air bubbles, the air bubbles are removed from the recess 28.
It is discharged into the valve operating chamber 14 through the orifice groove 29 along with a small amount of oil.
次に機関の運転を停止すれば、オイルポンプ２
５の作動も同時に止まるので、凹部２８及び供給
路２６内の油はオイルポンプ２５側へ流下、即ち
逆流するが、分配路２２内の油は、分配路２２の
上方へ立上る逆流止め通路２４によりオイルポン
プ２５側への逆流を阻止される。 Next, when engine operation is stopped, oil pump 2
5 also stops at the same time, the oil in the recess 28 and the supply path 26 flows down toward the oil pump 25, that is, flows backwards, but the oil in the distribution path 22 flows upward into the backflow prevention path 24, which rises above the distribution path 22. This prevents the backflow to the oil pump 25 side.
その際、この実施例では、動弁室１４からオリ
フイス溝２９を通して凹部２８へ空気が吸込まれ
るので、サイホン現象が抑えられ、分配路２２の
油の逆流を確実に防止することができる。 At this time, in this embodiment, air is sucked into the recess 28 from the valve operating chamber 14 through the orifice groove 29, so that the siphon phenomenon is suppressed and the backflow of oil in the distribution path 22 can be reliably prevented.
こうして分配路２２には、機関の停止後も油が
保持されるので、機関の再始動時には、オイルポ
ンプ２５からの油の供給を待つことなく、分配路
２２から各油圧タペツト１１への給油が速やかに
行われ、油圧タペツト１１の作動遅れを防止する
ことができる。 In this way, oil is retained in the distribution passage 22 even after the engine has stopped, so when the engine is restarted, oil can be supplied from the distribution passage 22 to each hydraulic tappet 11 without waiting for oil to be supplied from the oil pump 25. This is done quickly, and delays in the operation of the hydraulic tappet 11 can be prevented.
逆流止め通路２４及び供給路２６間を接続する
凹部２８は、シリンダヘツド３またはカムホルダ
１７の鋳造時にその形成が可能であるので、その
ためのドリル加工も盲栓も不要である。 The recess 28 connecting the backflow prevention passage 24 and the supply passage 26 can be formed when the cylinder head 3 or the cam holder 17 is cast, so there is no need for drilling or blind plugs for this purpose.
Ｃ 考案の効果
以上のように本考案によれば、分配路、供給路
及び逆流止め通路をシリンダヘツドに穿設し、動
弁装置のカム軸を挟持すべく相互に接合されるシ
リンダヘツド及びカムホルダの接合面の小なくと
もいずれか一方に連通路としての凹部を形成した
ので、前記凹部の形成のためにはドリル加工も盲
栓も不要であり、したがつて構造が簡単で製作が
容易であり、コストの低減に寄与し得るものであ
る。C. Effects of the invention As described above, according to the invention, the distribution passage, the supply passage, and the check passage are bored in the cylinder head, and the cylinder head and cam holder are connected to each other so as to sandwich the camshaft of the valve train. Since a recess is formed as a communication path on at least one of the joint surfaces of the recess, no drilling or blind plug is required to form the recess, and therefore the structure is simple and easy to manufacture. This can contribute to cost reduction.
図面は本考案の一実施例を示すもので、第１図
は本考案装置を備えた内燃機関の要部縦断側面
図、第２図は同機関の要部縦断正面図、第３図は
要部の分解斜視図である。
１……シリンダブロツク、３……シリンダヘツ
ド、６……吸（排）気弁、８……動弁装置、１１
……油圧タペツト、１２……カムフオロワ、１３
……カム軸、１４……動弁室、１６……軸受台、
１７……カムホルダ、１９，２０……側方凸部、
２１……給油口、２２……分配路、２２ａ……入
口、２４……逆流止め通路、２５……オイルポン
プ、２６……供給路、２８……凹部。
The drawings show one embodiment of the present invention; Fig. 1 is a longitudinal sectional side view of the main parts of an internal combustion engine equipped with the invention device, Fig. 2 is a longitudinal sectional front view of the main parts of the engine, and Fig. 3 is a main part of the engine. FIG. DESCRIPTION OF SYMBOLS 1... Cylinder block, 3... Cylinder head, 6... Intake (exhaust) valve, 8... Valve train, 11
... Hydraulic tappet, 12 ... Cam follower, 13
...Camshaft, 14...Valve train chamber, 16...Bearing stand,
17...cam holder, 19,20...lateral convex part,
21...Oil supply port, 22...Distribution path, 22a...Inlet, 24...Backflow prevention passage, 25...Oil pump, 26...Supply path, 28...Recess.
Claims (1)
通して略水平に延びる分配路と、この分配路の入
口から立上る逆流止め通路と、機関のオイルポン
プの吐出口から上方へ延出される供給路と、この
供給路及び前記逆流止め通路の各上端間を接続す
る連通路とを備えた、内燃機関の油圧タペツトへ
の給油装置において、前記分配路、供給路及び逆
流止め通路をシリンダヘツドに穿設し、動弁装置
のカム軸を挟持すべく相互に接合されるシリンダ
ヘツド及びカムホルダの接合面の少なくともいず
れか一方に前記連通路としての凹部を形成したこ
とを特徴とする、内燃機関の油圧タペツトへの給
油装置。 A distribution passage that communicates with each oil supply port of a plurality of hydraulic tappets of a valve train and extends approximately horizontally, a check passage that rises from the entrance of this distribution passage, and a passage that extends upward from a discharge port of an oil pump of an engine. A refueling device for a hydraulic tappet of an internal combustion engine, comprising a supply passage and a communication passage connecting the upper ends of the supply passage and the upper ends of the backflow prevention passage, wherein the distribution passage, the supply passage, and the backflow prevention passage are connected to a cylinder head. An internal combustion engine, characterized in that a recessed portion serving as the communicating passage is formed in at least one of the joint surfaces of a cylinder head and a cam holder that are joined to each other so as to sandwich a camshaft of a valve train. Lubricating device for the hydraulic tappet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5789985U JPH0338403Y2 (en) | 1985-04-18 | 1985-04-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5789985U JPH0338403Y2 (en) | 1985-04-18 | 1985-04-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61173706U JPS61173706U (en) | 1986-10-29 |
| JPH0338403Y2 true JPH0338403Y2 (en) | 1991-08-14 |
Family
ID=30582876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5789985U Expired JPH0338403Y2 (en) | 1985-04-18 | 1985-04-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0338403Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8375908B2 (en) | 2008-11-24 | 2013-02-19 | Hyundai Motor Company | Apparatus for preventing oil from draining in engine having HLA |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3319336B2 (en) * | 1997-05-01 | 2002-08-26 | 三菱自動車工業株式会社 | Engine oil passage structure |
| JP4544460B2 (en) * | 2005-01-13 | 2010-09-15 | ダイハツ工業株式会社 | Hydraulic supply device for multi-cylinder internal combustion engine |
-
1985
- 1985-04-18 JP JP5789985U patent/JPH0338403Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8375908B2 (en) | 2008-11-24 | 2013-02-19 | Hyundai Motor Company | Apparatus for preventing oil from draining in engine having HLA |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61173706U (en) | 1986-10-29 |
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