JPH0246766B2 - - Google Patents
Info
- Publication number
- JPH0246766B2 JPH0246766B2 JP60117792A JP11779285A JPH0246766B2 JP H0246766 B2 JPH0246766 B2 JP H0246766B2 JP 60117792 A JP60117792 A JP 60117792A JP 11779285 A JP11779285 A JP 11779285A JP H0246766 B2 JPH0246766 B2 JP H0246766B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- oil supply
- supply system
- valve
- hydraulic tappet
- 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 - Lifetime
Links
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 155
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
Ａ 発明の目的
(1) 産業上の利用分野
本発明は内燃機関の、油圧タペツト付動弁機構
の給油装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention relates to a lubricating device for a valve mechanism with a hydraulic tappet for an internal combustion engine.
(2) 従来の技術
従来、油圧タペツト付動弁機構において、その
動弁機構への供給潤滑油の一部を油圧タペツトに
導入できるようにした給油装置は公知である。(2) Prior Art Conventionally, in a valve mechanism with a hydraulic tappet, an oil supply device is known that allows a portion of the lubricating oil to be supplied to the valve mechanism to be introduced into the hydraulic tappet.
(3) 発明が解決しようとする課題
ところで油圧タペツト付動弁機構において、油
圧タペツトを作動する作動油、及び動弁機構の動
弁カム軸の軸受を潤滑する潤滑油は何れも、その
油量が少量で足りる反面、比較的高圧油である必
要があるのに対し、動弁機構における動弁カムと
カムフオロアとの連接部に噴射供給されるべき潤
滑油は、その油圧が低くてもよいが油量を比較的
多くする必要がある。そのため、これらの給油を
全て同じ給油系により行おうとすれば、油圧タペ
ツト及び動弁カム軸の軸受に供給される油の油圧
が適正圧よりも低くなり、また動弁カムとカムフ
オロアとの連接部に噴射供給される油量が適量よ
りも少なくなりがちであるという問題がある。(3) Problems to be Solved by the Invention By the way, in a valve mechanism with a hydraulic tappet, both the hydraulic oil that operates the hydraulic tappet and the lubricating oil that lubricates the bearing of the valve camshaft of the valve mechanism have a limited amount of oil. While a small amount of lubricating oil is sufficient, it needs to be relatively high-pressure oil, whereas the lubricating oil that is injected and supplied to the joint between the valve train cam and cam follower in the valve train does not need to have a low oil pressure. It is necessary to use a relatively large amount of oil. Therefore, if all of these oils are supplied using the same oil supply system, the oil pressure supplied to the hydraulic tappet and the bearing of the valve camshaft will be lower than the appropriate pressure, and the connection between the valve cam and the cam follower will be lower than the appropriate pressure. There is a problem in that the amount of oil that is injected and supplied tends to be less than the appropriate amount.
そこで本発明は油圧タペツト及び動弁カム軸の
軸受部には少量の高圧油を、また動弁カムとカム
フオロアとの連接部には多量の低圧油をそれぞれ
供給できるようにして前記問題を解決することが
でき、しかも構成簡単な、内燃機関の油圧タペツ
ト付動弁機構における給油装置を提供することを
目的とする。 Therefore, the present invention solves the above problem by supplying a small amount of high pressure oil to the hydraulic tappet and the bearing part of the valve drive camshaft, and a large amount of low pressure oil to the connection part between the valve drive cam and the cam follower. It is an object of the present invention to provide a refueling device for a valve mechanism with a hydraulic tappet of an internal combustion engine, which can be used in an internal combustion engine and has a simple configuration.
Ｂ 発明の構成
(1) 課題を解決するための手段
そして前記目的を達成するために本発明は、機
関本体の頭部に油圧タペツトを装着し、この油圧
タペツトを、動弁カム軸上の動弁カムに連動して
揺動されるカムフオロアを介して吸気弁、もしく
は排気弁に連接してなる油圧タペツト付動弁機構
において、前記機関本体の頭部には、前記油圧タ
ペツトおよび動弁カム軸の軸受に給油するための
第１給油系と、前記動弁カムとカムフオロアとの
連接部に噴射供給するための第２給油系とが別設
され、それら第１及び第２給油系は共通の送油路
に互いに並列に接続され、その第１給油系の給油
圧が第２給油系のそれよりも高く且つ第１給油系
の給油量が第２給油系のそれよりも少なくなるよ
うに、前記送油路と第１給油系間に第１オイルジ
エツトが、また同送油路と第２給油系間に第２オ
イルジエツトがそれぞれ設けられることを特徴と
する。B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a hydraulic tappet mounted on the head of the engine main body, and a hydraulic tappet connected to the valve drive camshaft. In a valve mechanism with a hydraulic tappet connected to an intake valve or an exhaust valve via a cam follower that swings in conjunction with a valve cam, the hydraulic tappet and the valve camshaft are attached to the head of the engine body. A first oil supply system for supplying oil to the bearing, and a second oil supply system for injecting and supplying oil to the joint between the valve train cam and the cam follower are separately provided, and these first and second oil supply systems share a common oil supply system. connected in parallel to each other in the oil supply path, such that the oil pressure of the first oil supply system is higher than that of the second oil supply system and the amount of oil supplied by the first oil supply system is smaller than that of the second oil supply system, A first oil jet is provided between the oil feed path and the first oil supply system, and a second oil jet is provided between the oil feed path and the second oil feed system.
(2) 作用
前記構成によれば、油圧タペツトおよび動弁カ
ム軸の軸受には、送油路から第１オイルジエツト
を介して第１給油系に導かれた少量の高圧油が供
給され、動弁カムとカムフオロアの連接部には、
同送油路から第２オイルジエツトを介して第２給
油系に導かれた多量の低圧油が噴射供給される。(2) Effect According to the above configuration, a small amount of high-pressure oil led from the oil supply path to the first oil supply system via the first oil jet is supplied to the hydraulic tappet and the bearing of the valve drive camshaft, and the valve drive At the connection part of the cam and cam follower,
A large amount of low-pressure oil is injected and supplied from the oil feed path to the second oil supply system via the second oil jet.
(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弁式４サイクル内燃機関の機関本
体Ｅは、シリンダブロツク１と、その上にガスケ
ツト３を介して重合されるシリンダヘツド２とを
備え、それらは複数本のヘツドボルト４（第３
図）によつて一体に結着される。 The engine body E of the DOHC type 4-valve 4-cycle internal combustion engine includes a cylinder block 1 and a cylinder head 2 superposed thereon via a gasket 3, which is connected to a plurality of head bolts 4 (third
(Fig.).
機関本体Ｅのシリンダヘツド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、それらのポート６，７は、シリ
ンダヘツド２に昇降可能に支持される吸、排気弁
８，９によつてそれぞれ開閉される。 The cylinder head 2 of the engine body E is connected to the combustion chamber 5.
and intake and exhaust ports 6 opening into the combustion chamber 5,
7 are formed, and these ports 6, 7 are opened and closed, respectively, by intake and exhaust valves 8, 9 which are supported on the cylinder head 2 so as to be movable up and down.
前記吸、排気弁８，９はそれぞれ油圧タペツト
１０を備えた動弁機構１１によつて所定のタイミ
ングを以て開閉駆動される。 The intake and exhaust valves 8 and 9 are driven to open and close at predetermined timings by valve operating mechanisms 11 each having a hydraulic tappet 10.
前記動弁機構１１は、シリンダヘツド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 head 2.
前記油圧タペツト１０付の動弁機構１１は従来
公知の構造を備えるもので、シリンダヘツド２の
中央部には一気筒当りＶ字状に二対の支持孔１３
…が形成され、これらの支持孔１３…に油圧タペ
ツト１０…がそれぞれ装着される。各油圧タペツ
ト１０…の作動端部、すなわちプランジヤ１４の
球面状上端には吸、排気用カムフオロア１５ある
いは１６の一端が連接され、それらのカムフオロ
ア１５，１６他端は弁ばね２１，２１によつてそ
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、排気用カムフオロア１
５，１６の中間部上面にそれぞれ形成されるスリ
ツパ面には、一対の動弁カム軸１７，１８の動弁
カム１９，２０が連接され、これら動弁カム１
９，２０の回転と、前記弁ばね２１，２２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、シリンダヘツド２上の軸受半部２
３，２４とその上に固着される軸受キヤツプ２
５，２６とで形成される軸受２７，２８によつて
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 the cylinder head 2 has two pairs of V-shaped support holes 13 in the center of each cylinder.
... are formed, and hydraulic tappets 10 are respectively installed in these support holes 13. One end of a suction/exhaust cam follower 15 or 16 is connected to the operating end of each hydraulic tappet 10, that is, the spherical upper end of the plunger 14, and the other end of the cam follower 15, 16 is connected to the spherical upper end of the plunger 14. They are engaged with the upper ends of the intake and exhaust valves 8 and 9, respectively, which are biased in the valve closing direction. Cam follower for intake and exhaust 1
Valve drive cams 19 and 20 of a pair of valve drive cam shafts 17 and 18 are connected to the slipper surfaces formed on the upper surfaces of intermediate portions of the valve drive cams 5 and 16, respectively.
The intake and exhaust valves 8 and 9 are opened and closed at predetermined timings by the rotation of the valves 9 and 20 and the cooperation with the valve springs 21 and 22. A pair of valve drive camshafts 17 and 18 for intake and exhaust are mounted on a bearing half 2 on the cylinder head 2.
3, 24 and the bearing cap 2 fixed thereon
They are rotatably supported by bearings 27 and 28 formed by bearings 5 and 26, respectively.
シリンダ２には、前記油圧タペツト１０…に作
動油を給油するとともに動弁カム軸１７，１８の
軸受２７，２８に潤滑油を供給するための第１給
油系L1と、動弁カム１９，２０とカムフオロア
１５，１６との連接部に潤滑油を供給するための
第２給油系L2とが別設される。 The cylinder 2 includes a first oil supply system L 1 for supplying hydraulic oil to the hydraulic tappets 10 and to the bearings 27 and 28 of the valve drive camshafts 17 and 18, and a valve drive cam 19, A second oil supply system L 2 for supplying lubricating oil to the connecting portion between the cam follower 20 and the cam followers 15 and 16 is separately provided.
第３図に示すようにシリンダヘツド２上は、そ
の長手方向中間部に門型をなす給油フレーム３０
がオイルシールを介して載設され、この給油フレ
ーム３０は、シリンダヘツド２をシリンダブロツ
ク１に固着するための２本のヘツドボルト４を利
用してシリンダヘツド２上に固定される。前記シ
リンダヘツド２と給油フレーム３０の一側には、
それらを通してヘツドボルト４の通し孔を兼ねる
送油路３１が上下方向に形成され、この送油路３
１の開口上端はヘツドボルト４の頭部によつて閉
じられる。また送油路３１の下端は、シリンダブ
ロツク１に穿設したブロツク側油路３２を介して
油圧ポンプＰに連通される。 As shown in FIG. 3, on the cylinder head 2 there is a gate-shaped oil supply frame 30 at the longitudinally intermediate portion thereof.
is mounted via an oil seal, and this oil supply frame 30 is fixed onto the cylinder head 2 using two head bolts 4 for fixing the cylinder head 2 to the cylinder block 1. On one side of the cylinder head 2 and oil supply frame 30,
Through these, an oil passage 31 which also serves as a through hole for the head bolt 4 is formed in the vertical direction, and this oil passage 3
The upper end of the opening 1 is closed by the head of the head bolt 4. Further, the lower end of the oil feed passage 31 is communicated with a hydraulic pump P via a block side oil passage 32 bored in the cylinder block 1.
送油路３１には、前記第１、第２給油系L1，
L2が並列に接続される。 The oil supply path 31 includes the first and second oil supply systems L 1 ,
L 2 are connected in parallel.
次に第１〜３，５図により第１給油系L1の具
体的構造を説明すると、この第１給油系L1は、
シリンダヘツド２に直接穿設されており、シリン
ダヘツド２の上部を長手方向に水平にのびる２本
の縦油路３３，３３と、これらの縦油路３３，３
３の中央部と交叉してそれらに連通する略水平な
横油路３４とを備えており、横油路３４は前記送
油路３１に連通され、その連通部に第１オイルジ
エツト４６が設けられる。２本の縦油路３３，３
３は、それぞれ油圧タペツト１０…を支持するた
めの複数の支持孔１３…を横切るようにしてそれ
らの孔１３…に連通され、それらの縦油路３３，
３３の両端は盲栓３５…によつて閉じられてい
る。また一対の縦油路３３，３３からは動弁カム
軸１７の軸受２７…，２８…に対応して複数の分
岐油路３６…，３７…（第２図）が分岐されてお
り、それらの分岐油路３６…，３７…はそれぞれ
軸受３７…，３８…に向けて斜め上方に傾斜して
のびており、それらの開口端は前記軸受２７…，
２８…の軸受面に連通される。 Next, the specific structure of the first oil supply system L 1 will be explained with reference to FIGS. 1 to 3 and 5. This first oil supply system L 1 is
Two vertical oil passages 33, 33 are directly drilled in the cylinder head 2 and extend horizontally in the longitudinal direction of the upper part of the cylinder head 2, and these vertical oil passages 33, 3
3 and a substantially horizontal horizontal oil passage 34 that intersects and communicates with the central portion of the oil passage 3, the horizontal oil passage 34 communicates with the oil feed passage 31, and a first oil jet 46 is provided in the communication portion. . Two vertical oil passages 33, 3
3 are communicated with the plurality of support holes 13 for supporting the hydraulic tappets 10, respectively, so as to cross the holes 13, and the vertical oil passages 33,
Both ends of 33 are closed by blind plugs 35. Further, from the pair of vertical oil passages 33, 33, a plurality of branch oil passages 36..., 37... (Fig. 2) are branched out corresponding to the bearings 27..., 28... of the valve drive camshaft 17. The branch oil passages 36..., 37... extend obliquely upward toward the bearings 37..., 38..., and their open ends are connected to the bearings 27..., 38..., respectively.
It communicates with the bearing surface of 28....
前記横油路３４の、送油路３１より外側に延長
する上流側端部には、動弁室１２に開口するエア
ブリード通路３８が連通され、このエアブリード
通路にエアブリードプラグ３９が螺着される。 An air bleed passage 38 that opens into the valve operating chamber 12 is communicated with the upstream end of the horizontal oil passage 34 that extends outward from the oil feed passage 31, and an air bleed plug 39 is screwed into this air bleed passage. be done.
また横油路３４の、他方の縦油路３３よりも外
側に延長する下流側端部には、リリーフ弁４０が
挿入されており、このリリーフ弁４０はリリーフ
孔４１を開閉するピストン４２と、このピストン
４２をリリーフ孔４１の閉じ方向に付勢する弁ば
ね４３とより構成される。 Further, a relief valve 40 is inserted into the downstream end of the horizontal oil passage 34 that extends outward from the other vertical oil passage 33, and this relief valve 40 has a piston 42 that opens and closes the relief hole 41, It is composed of a valve spring 43 that biases the piston 42 in the direction in which the relief hole 41 is closed.
次に主に第２〜４図を参照して前記第２給油系
L2について説明すると、これは前記シリンダヘ
ツド２上の給油フレーム３０を貫通して、シリン
ダヘツド２上を互いに平行に略水平にのびる２本
の給油パイプ４４，４４と、前記給油フレーム３
０の上部に略水平に穿設されて前記２本の給油パ
イプ４４，４４を略直角に相互に連通する横油路
４５とを備えており、該横油路４５は送油路３１
に略直角に連通されており、その連通部に第２オ
イルジエツト４７が設けられる。 Next, mainly referring to Figs. 2 to 4, the second oil supply system will be explained.
To explain L 2 , it consists of two oil supply pipes 44 , 44 that pass through the oil supply frame 30 on the cylinder head 2 and extend substantially horizontally on the cylinder head 2 in parallel to each other, and the oil supply frame 3 .
0 is provided with a horizontal oil passage 45 that is bored approximately horizontally in the upper part of the oil supply pipe 44 and communicates the two oil supply pipes 44 and 44 with each other at approximately right angles, and the horizontal oil passage 45 is connected to the oil supply passage 31
A second oil jet 47 is provided at the communicating portion.
２本の給油パイプ４４，４４の途中は、シリン
ダヘツド２より上方に突出する支持片４８，４８
に貫通支持され、それらの給油パイプ４４，４４
の両端部に閉じられている。前記２本の給油パイ
プ４４，４４には第１図に示すように各動弁カム
１９，２０とカムフオロア１５，１６の連接部に
対応して該連接部に指向する複数の給油ノズル４
９…が穿設されており、送油路３１より第２オイ
ルジエツト４７を通つて２本の給油パイプ４４，
４４を流れる圧力油はそれらの給油ノズル４９…
を通つて前記連接部に噴射される。 In the middle of the two oil supply pipes 44, 44 are support pieces 48, 48 that protrude upward from the cylinder head 2.
are supported through the oil supply pipes 44, 44.
is closed at both ends. As shown in FIG. 1, the two oil supply pipes 44, 44 are provided with a plurality of oil supply nozzles 4 corresponding to the joints between the valve drive cams 19, 20 and the cam followers 15, 16 and directed toward the joints.
9... are bored, and two oil supply pipes 44,
The pressure oil flowing through the oil supply nozzles 49...
is injected into the connecting portion through the.
次にこの実施例の作用について説明すると、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、排気ガム１９，２０の回転
と、弁ばね２１，２２の弾発力とによりカムフオ
ロア１５，１６は油圧タペツト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は上下に摺動して所定のタイミングで開閉され
る。 Next, to explain the operation of this embodiment, the pair of valve drive camshafts 17 and 18 are now moved by the operation of the engine.
When the cam followers 15 and 16 are rotated, the rotation of the suction and exhaust gums 19 and 20 and the elastic force of the valve springs 21 and 22 cause the cam followers 15 and 16 to swing up and down using the joints with the hydraulic tappets 10 and 10 as fulcrums. , intake and exhaust valves 8,
9 slides up and down and is opened and closed at a predetermined timing.
また機関の運転により駆動される油圧ポンプＰ
からの油圧の一部は、ブロツク側油路３２から送
油路３５に流れる。 In addition, the hydraulic pump P driven by the operation of the engine
A part of the oil pressure from the block side oil passage 32 flows to the oil feed passage 35.
送油路３１内の油圧は第１、第２オイルジエツ
ト４６，４７を通つて第１、第２給油系L1，L2
に分配供給される。この場合、前記両オイルジエ
ツト４６，４７によつて第１給油系L1に少量の
高圧油が供給され、第２給油系L2に多量の低圧
油が供給されるように調整される。 The oil pressure in the oil feed path 31 is transmitted through the first and second oil jets 46 and 47 to the first and second oil supply systems L 1 and L 2 .
distributed and supplied to In this case, the oil jets 46 and 47 are adjusted so that a small amount of high pressure oil is supplied to the first oil supply system L1 , and a large amount of low pressure oil is supplied to the second oil supply system L2 .
第１給油系L1に流入した油は２本の縦油路３
３，３３に分流し、そこから支持孔１３…を通つ
て油圧タペツト１０…に給油されると同時に複数
の分岐油路３６…，３７…にも流れ、そこから動
弁カム軸１７，１８の軸受２７…，２８…に給油
され、それらを潤滑する。 The oil that has flowed into the first oil supply system L1 flows through two vertical oil passages 3.
3, 33, from which the oil is supplied to the hydraulic tappet 10... through the support hole 13..., and at the same time flows into the plurality of branch oil passages 36..., 37..., from where it is supplied to the valve drive camshafts 17, 18. The bearings 27..., 28... are supplied with oil to lubricate them.
一方第２給油系L2に流入した油は２本の給油
パイプ４４，４４に分流され、それらより複数の
給油ノズル４９…を通つて各動弁カム１９，２０
とカムフオロア１５，１６との連接部に噴射さ
れ、該連接部を潤滑することができる。 On the other hand, the oil that has flowed into the second oil supply system L2 is divided into two oil supply pipes 44, 44, and passes through a plurality of oil supply nozzles 49... to each valve operating cam 19, 20.
The lubricant is injected into the joints between the cam followers 15 and 16, and can lubricate the joints.
Ｃ 発明の効果
以上のように本発明によれば、機関本体の頭部
には、油圧タペツトおよび動弁カム軸の軸受に給
油するための第１給油系と、動弁カムとカムフオ
ロアとの連接部に噴射給油するための第２給油系
とが別設され、それら第１及び第２給油系は共通
の送油路に互いに並列に接続され、その第１給油
系の給油圧が第２給油系のそれよりも高く且つ第
１給油系の給油量が第２給油系のそれよりも少な
くなるように、前記送油路と第１給油系間に第１
オイルジエツトが、また同送油路と第２給油系間
に第２オイルジエツトがそれぞれ設けられるの
で、少量でも高圧の油をそれぞれ必要とする油圧
タペツトおよび動弁カム軸軸受部へは、送油路か
ら第１オイルジエツトを介して第１給油系に導か
れた少量の高圧油を、また低圧でも多量の油を必
要とする動弁カムとカムフオロアの連接部へは、
同送油路から第２オイルジエツトを介して第２給
油系に導かれた多量の低圧油をそれぞれ供給する
ことができ、従つて送油路を共通としたにも拘わ
らず、油圧タペツト及び動弁カム軸軸受部に対し
てはそれらに本来必要な油圧を十分確保しつつ第
１給油系より、また動弁カムとカムフオロアとの
連接部に対してはそこに本来必要な油量を十分確
保しつつ第２給油系より、それぞれ確実に給油す
ることができるから、油圧タペツトの作動を確実
にすると共に動弁カム軸の軸受部および動弁カム
とカムフオロアとの連接部の各潤滑性を高めるこ
とができて、全体として油圧タペツト付動弁機構
を常に円滑に作動させることができる。しかも上
記のような第１給油系の給油圧確保と、第２給油
系の給油量確保とを第１及び第２オイルジエツト
の適宜選定によるだけで達成することができる
上、その両給油系の給油源たる前記送油路を共通
に使用することができるから、全体として油路構
成が簡単でコストダウンに寄与することができ
る。C. Effects of the Invention As described above, according to the present invention, the head of the engine body includes a first oil supply system for lubricating the hydraulic tappet and the bearing of the valve drive camshaft, and a connection between the valve drive cam and the cam follower. A second oil supply system for injecting oil to the oil supply system is separately provided, and the first and second oil supply systems are connected in parallel to a common oil supply path, and the oil pressure of the first oil supply system is supplied to the second oil supply system. A first oil supply line is connected between the oil supply path and the first oil supply system so that the oil supply amount of the first oil supply system is higher than that of the first oil supply system and is smaller than that of the second oil supply system.
Since an oil jet and a second oil jet are provided between the same oil feed path and the second oil supply system, the hydraulic tappet and valve train camshaft bearing, which require even a small amount of high-pressure oil, can be accessed from the oil feed path. A small amount of high-pressure oil is led to the first oil supply system through the first oil jet, and to the joint between the valve train cam and cam follower, which requires a large amount of oil even at low pressure.
A large amount of low-pressure oil led to the second oil supply system can be supplied from the same oil passage through the second oil jet, and therefore, even though the oil passage is shared, the hydraulic tappet and valve train For the camshaft bearings, secure the necessary oil pressure from the first oil supply system, and for the connection between the valve drive cam and cam follower, secure the necessary oil amount there. At the same time, oil can be reliably supplied from the second oil supply system, thereby ensuring the operation of the hydraulic tappet and increasing the lubricity of the bearing part of the valve drive camshaft and the connection part between the valve drive cam and the cam follower. As a result, the hydraulic tappet-equipped valve mechanism as a whole can be operated smoothly at all times. Furthermore, securing the oil pressure in the first oil supply system and securing the oil supply amount in the second oil supply system as described above can be achieved simply by appropriately selecting the first and second oil jets. Since the oil supply path, which is the oil source, can be used in common, the overall oil path configuration is simple and can contribute to cost reduction.
図面は本発明装置の一実施例を示すもので、第
１図は第４図−線に沿う機関本体頭部の縦断
面図、第２図は第４図−線に沿う機関本体頭
部の縦断面図、第３図は第４図−線に沿う機
関本体の縦断面図、第４図は第１図矢視図、第
５図は第３図−線に沿う横断面図である。
Ｅ……機関本体、L1，L2……第１、第２給油
系、８……吸気弁、９……排気弁、１０……油圧
タペツト、１５，１６……カムフオロア、１７，
１８……動弁カム軸、１９，２０……動弁カム、
２６……軸受キヤツプ、２７……軸受、３１……
送油路、４６……第１オイルジエツト、４７……
第２オイルジエツト。
The drawings show one embodiment of the device of the present invention, and FIG. 1 is a longitudinal sectional view of the head of the engine body taken along the line in FIG. 4, and FIG. FIG. 3 is a longitudinal sectional view of the engine body taken along the line in FIG. 4, FIG. 4 is a view taken in the direction of the arrow in FIG. 1, and FIG. E...engine body, L1 , L2 ...first and second oil supply systems, 8...intake valve, 9...exhaust valve, 10...hydraulic tappet, 15, 16...cam follower, 17,
18... Valve drive camshaft, 19, 20... Valve drive cam,
26... Bearing cap, 27... Bearing, 31...
Oil feed path, 46...First oil jet, 47...
2nd oil jet.
Claims (1)
し、この油圧タペツト１０を、動弁カム軸１７，
１８上の動弁カム１９，２０に連動して揺動され
るカムフオロア１５，１６を介して吸気弁８、も
しくは排気弁９に連接してなる油圧タペツト付動
弁機構において、前記機関本体Ｅの頭部には、前
記油圧タペツト１０および動弁カム軸１７，１８
の軸受２７に給油するための第１給油系L1と、
前記動弁カム１９，２０とカムフオロア１５，１
６との連接部に噴射給油するための第２給油系
L2とが別設され、それら第１及び第２給油系L1，
L2は共通の送油路３１に互いに並列に接続され、
その第１給油系L1の給油圧が第２給油系L2のそ
れよりも高く且つ第１給油系L1の給油量が第２
給油系L2のそれよりも少なくなるように、前記
送油路３１と第１給油系L1間に第１オイルジエ
ツト４６が、また同送油路３１と第２給油系L2
間に第２オイルジエツト４７がそれぞれ設けられ
ることを特徴とする、内燃機関の油圧タペツト付
動弁機構における給油装置。1 A hydraulic tappet 10 is attached to the head of the engine body E, and this hydraulic tappet 10 is connected to the valve drive camshaft 17,
In the valve mechanism with a hydraulic tappet, which is connected to the intake valve 8 or the exhaust valve 9 via cam followers 15 and 16 that are oscillated in conjunction with valve cams 19 and 20 on the engine body E, The hydraulic tappet 10 and valve drive camshafts 17, 18 are mounted on the head.
a first oil supply system L 1 for supplying oil to the bearing 27;
The valve train cams 19, 20 and cam followers 15, 1
2nd oil supply system for injecting oil to the connection part with 6
L 2 are separately installed, and the first and second oil supply systems L 1 ,
L 2 are connected in parallel to each other to a common oil supply path 31,
The oil pressure of the first oil supply system L1 is higher than that of the second oil supply system L2 , and the oil supply amount of the first oil supply system L1 is higher than that of the second oil supply system L2.
A first oil jet 46 is disposed between the oil supply passage 31 and the first oil supply system L1 , and a first oil jet 46 is provided between the oil supply passage 31 and the second oil supply system L2 so that the number of jets is smaller than that of the oil supply system L2 .
An oil supply device for a valve mechanism with a hydraulic tappet for an internal combustion engine, characterized in that a second oil jet 47 is provided between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11779285A JPS61277810A (en) | 1985-05-31 | 1985-05-31 | Oil feeding apparatus in tappet mechanism equipped with hydraulic tappet for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11779285A JPS61277810A (en) | 1985-05-31 | 1985-05-31 | Oil feeding apparatus in tappet mechanism equipped with hydraulic tappet for internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61277810A JPS61277810A (en) | 1986-12-08 |
| JPH0246766B2 true JPH0246766B2 (en) | 1990-10-17 |
Family
ID=14720407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11779285A Granted JPS61277810A (en) | 1985-05-31 | 1985-05-31 | Oil feeding apparatus in tappet mechanism equipped with hydraulic tappet for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61277810A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63112210U (en) * | 1987-01-14 | 1988-07-19 | ||
| JPH087043Y2 (en) * | 1988-10-29 | 1996-02-28 | 富士重工業株式会社 | Lubricator for double overhead cam type valve mechanism |
| JPH0272307U (en) * | 1988-11-18 | 1990-06-01 | ||
| US7845316B2 (en) | 2007-07-06 | 2010-12-07 | Brp-Powertrain Gmbh & Co Kg | Internal combustion engine cooling system |
| JP5039503B2 (en) * | 2007-10-25 | 2012-10-03 | 川崎重工業株式会社 | Lubrication structure of valve gear |
| JP6299144B2 (en) * | 2013-10-22 | 2018-03-28 | スズキ株式会社 | Internal combustion engine lubrication structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57126512A (en) * | 1981-01-30 | 1982-08-06 | Honda Motor Co Ltd | Lubricator for internal combustion engine |
| JPS5960016A (en) * | 1982-09-30 | 1984-04-05 | Honda Motor Co Ltd | Oil supply path for cam bearing and oil-pressure type lash adjustor |
| JPS6057715B2 (en) * | 1978-02-24 | 1985-12-16 | 株式会社日立製作所 | Optically coupled semiconductor integrated device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6057715U (en) * | 1983-09-27 | 1985-04-22 | 本田技研工業株式会社 | Oil supply passage structure in internal combustion engine valve train |
-
1985
- 1985-05-31 JP JP11779285A patent/JPS61277810A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6057715B2 (en) * | 1978-02-24 | 1985-12-16 | 株式会社日立製作所 | Optically coupled semiconductor integrated device |
| JPS57126512A (en) * | 1981-01-30 | 1982-08-06 | Honda Motor Co Ltd | Lubricator for internal combustion engine |
| JPS5960016A (en) * | 1982-09-30 | 1984-04-05 | Honda Motor Co Ltd | Oil supply path for cam bearing and oil-pressure type lash adjustor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61277810A (en) | 1986-12-08 |
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