JPH0120290B2 - - Google Patents
Info
- Publication number
- JPH0120290B2 JPH0120290B2 JP56012648A JP1264881A JPH0120290B2 JP H0120290 B2 JPH0120290 B2 JP H0120290B2 JP 56012648 A JP56012648 A JP 56012648A JP 1264881 A JP1264881 A JP 1264881A JP H0120290 B2 JPH0120290 B2 JP H0120290B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- rocker
- follower
- shaft
- 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.)
- Expired
Links
- 239000003921 oil Substances 0.000 claims abstract description 90
- 239000010720 hydraulic oil Substances 0.000 claims description 17
- 239000010687 lubricating oil Substances 0.000 abstract description 15
- 238000005461 lubrication Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 21
- 239000000203 mixture Substances 0.000 description 9
- 230000001050 lubricating effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1824—Number of cylinders six
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/34—Lateral camshaft position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
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、特にクランク軸に連動す
るカム軸をシリンダの一側に配設し、このカム軸
に隣接して配置したフオロア軸に、前記カム軸に
係合するロツカフオロアを揺動可能に枢支し、こ
のロツカフオロアと、シリンダヘツド上のロツカ
軸に枢支されて吸気弁または排気弁に連動するロ
ツカアームとの間をプツシユロツドを介して連接
してなる内燃機関における潤滑装置に関する。[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Field of Application The present invention provides an internal combustion engine, in particular, a camshaft that is interlocked with the crankshaft, is disposed on one side of the cylinder, and is adjacent to the camshaft. A rocker follower that engages with the camshaft is pivotally supported on a follower shaft arranged at The present invention relates to a lubrication system for an internal combustion engine in which the engine is connected via a push rod.
(2) 従来技術
従来、クランク軸に連動するカム軸をシリンダ
の一側に配設し、このカム軸と、シリンダヘツド
上のロツカ軸に枢支されて吸気弁または排気弁に
連動するロツカアームとの間をプツシユロツドを
介して連接するようにした内燃機関において、カ
ム軸に当接するカムフオロアとしてのタペツトの
摺動部を介して、機関本体に穿設されて油ポンプ
に連なる主油路と、プツシユロツド内の給油路と
の間を連通させるようにしたものは公知である
(例えば特開昭53―59147号公報、実開昭55―
125903号公報参照)。(2) Prior Art Conventionally, a camshaft that is linked to the crankshaft is disposed on one side of the cylinder, and this camshaft and a rocker arm that is pivotally supported by a rocker shaft on the cylinder head and that is linked to the intake valve or exhaust valve. In an internal combustion engine, the main oil passage connected to the oil pump, which is drilled in the engine body, and the push rod are connected to each other through a sliding part of a tapepet as a cam follower that contacts the camshaft. There are well-known devices that communicate with the inner fuel supply passage (for example, Japanese Unexamined Patent Publication No. 59147/1983, Japanese Utility Model Publication No. 55/1983).
(See Publication No. 125903).
(3) 発明が解決しようとする課題
上記従来装置では、カムフオロアとしてのタペ
ツトが摺動式であつて、その摺動部より潤滑油が
漏洩しやすく、また上記主油路からタペツト、プ
ツシユロツドを経てロツカアームに至る、潤滑専
用の給油路を特別に形成する必要がある。(3) Problems to be Solved by the Invention In the above conventional device, the tappet as a cam follower is a sliding type, and lubricating oil easily leaks from the sliding part, and lubricating oil leaks from the main oil passage through the tappet and push rod. It is necessary to specially form an oil supply path exclusively for lubrication leading to the rocker arm.
本発明は上記に鑑み提案されたもので、カムフ
オロアからの潤滑油の漏洩が少なく、しかも油圧
式タペツト機構の作動油室および漏油間隙を上記
給油路の一部に利用できるようにした構造簡単
な、内燃機関における潤滑装置を提供することを
目的とする。 The present invention has been proposed in view of the above, and has a simple structure in which there is little leakage of lubricating oil from the cam follower, and the hydraulic oil chamber and oil leakage gap of the hydraulic tappet mechanism can be used as part of the oil supply path. The object of the present invention is to provide a lubricating device for an internal combustion engine.
B 発明の構成
(1) 課題を解決するための手段
上記目的を達成するために本発明によれば、ク
ランク軸に連動するカム軸をシリンダの一側に配
設し、このカム軸に隣接して配置したフオロア軸
に、前記カム軸に係合するロツカフオロアを揺動
可能に枢支し、このロツカフオロアと、シリンダ
ヘツド上のロツカ軸に枢支されて吸気弁または排
気弁に連動するロツカアームとの間をプツシユロ
ツドを介して連接してなる内燃機関において、前
記フオロア軸、ロツカフオロア、プツシユロツ
ド、ロツカアーム及びロツカ軸には、それらの相
互接触部を通る一連の給油路が穿設されると共
に、この給油路の、フオロア軸側の一端が油ポン
プに連通され、前記ロツカフオロアは油圧タペツ
ト機構を備え、このタペツト機構の作動油室及び
漏油間隙を前記給油路の一部として機能させるべ
く、該作動油室が前記ロツカフオロア内の前記給
油路に、また該漏油間隙が前記プツシユロツド内
の前記給油路にそれぞれ連通される。B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, according to the present invention, a camshaft that interlocks with the crankshaft is disposed on one side of the cylinder, and a camshaft that is adjacent to the camshaft is disposed on one side of the cylinder. A rocker follower that engages with the camshaft is pivotally supported on a follower shaft arranged at In an internal combustion engine, the follower shaft, the rocker follower, the push rod, the rocker arm, and the rocker shaft are provided with a series of oil supply passages passing through their mutual contact portions, and this oil supply passage. One end of the follower shaft side is communicated with an oil pump, and the rocker follower is equipped with a hydraulic tappet mechanism. is communicated with the oil supply passage in the rocker follower, and the oil leakage gap is communicated with the oil supply passage in the push rod.
(2) 作用
揺動式ロツカフオロアはフオロア軸回りに回転
摺動するものであつて、その摺動量が僅かである
から、その回転摺動部を通して上記給油路から漏
洩する潤滑油量は少ない。(2) Effect The rocking rocker follower rotates and slides around the follower axis, and the amount of sliding is small, so the amount of lubricant that leaks from the oil supply path through the rotating and sliding portion is small.
またロツカフオロア内の給油路を流れる潤滑油
は油圧タペツト機構の作動油室及び漏油間隙を経
てプツシユロツド内の給油路へ流れる。 Furthermore, the lubricating oil flowing through the oil supply passage in the rocker follower flows to the oil supply passage within the push rod via the hydraulic oil chamber of the hydraulic tappet mechanism and the oil leakage gap.
(3) 実施例
以下、図面により本発明の一実施例について説
明すると、第1〜3図に示す内燃機関は、それぞ
れ複数のシリンダ1を並設した左右2列のシリン
ダ列C1,C2をV字状に配列してV型多気筒内燃
機関に構成されている。両シリンダ列C1,C2の
シリンダブロツク2の下端にはそれらに共通のク
ランクケース3が一体に連設され、このクランク
ケース3に支承されるクランク軸4に、各シリン
ダ1に摺合するピストン5がコンロツド6を介し
て連結される。(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The internal combustion engine shown in FIGS. 1 to 3 has two left and right cylinder rows C 1 and C 2 each having a plurality of cylinders 1 arranged in parallel. are arranged in a V-shape to form a V-type multi-cylinder internal combustion engine. A common crankcase 3 is integrally connected to the lower ends of the cylinder blocks 2 of both cylinder rows C 1 and C 2 , and a piston that slides into each cylinder 1 is attached to a crankshaft 4 supported by this crankcase 3. 5 are connected via connecting rod 6.
シリンダ列C1,C2の各シリンダヘツド7には、
ピストン5により画成される主燃焼室8と、その
燃焼室8にトーチノズル10を介して連通する副
燃焼室9と、主燃焼室8に開口する主吸気ポート
11および排気ポート13と、副燃焼室9に開口
する副吸気ポート12とがそれぞれ形成され、主
吸気ポート11は主吸気弁14により、また副吸
気ポート12は副吸気弁15により、また排気ポ
ート13は排気弁16によりそれぞれ開閉され
る。これらの弁14,15,16にはそれらを閉
じ方向に付勢する閉弁ばね35,36,37が付
設されている。 Each cylinder head 7 of cylinder rows C 1 and C 2 has the following:
A main combustion chamber 8 defined by the piston 5, a sub-combustion chamber 9 communicating with the combustion chamber 8 via a torch nozzle 10, a main intake port 11 and an exhaust port 13 that open to the main combustion chamber 8, and a sub-combustion chamber 9 that communicates with the combustion chamber 8 via a torch nozzle 10. A sub-intake port 12 that opens into the chamber 9 is formed, and the main intake port 11 is opened and closed by a main intake valve 14, the sub-intake port 12 is opened and closed by a sub-intake valve 15, and the exhaust port 13 is opened and closed by an exhaust valve 16. Ru. These valves 14, 15, 16 are attached with valve closing springs 35, 36, 37 that bias them in the closing direction.
シリンダヘツド7に螺着される点火栓17は電
極を副燃焼室9に臨ませている。 An ignition plug 17 screwed onto the cylinder head 7 has an electrode facing the auxiliary combustion chamber 9.
両シリンダ列C1,C2のシリンダヘツド7,7
間に吸気マニホールド18が架設され、その上面
に気化器19が取付られる。気化器19は希薄混
合気と濃厚混合気を同時に生成することができ、
吸気マニホールド18は上記希薄混合気をすべて
の主吸気ポート11に、また上記濃厚混合気をす
べての副吸気ポート12にそれぞれ分配すること
ができる。 Cylinder heads 7, 7 of both cylinder rows C 1 and C 2
An intake manifold 18 is installed between them, and a carburetor 19 is attached to the upper surface of the intake manifold 18. The carburetor 19 can simultaneously generate a lean mixture and a rich mixture,
The intake manifold 18 can distribute the lean mixture to all the main intake ports 11 and the rich mixture to all the auxiliary intake ports 12, respectively.
両シリンダ列C1,C2間の中央において、クラ
ンク軸4に可及的近接してカム軸20が配設され
る。このカム軸20はシリンダブロツク2に支承
され、そして一対の歯車21,22とそれらに懸
回したチエーン23とよりなる調時伝動装置24
を介してクランク軸4に連動し、それから2分の
1の減速比で駆動されるようになつている。 A camshaft 20 is disposed in the center between both cylinder rows C 1 and C 2 as close as possible to the crankshaft 4 . This camshaft 20 is supported by a cylinder block 2, and a timing transmission device 24 comprising a pair of gears 21, 22 and a chain 23 suspended between them.
The motor is linked to the crankshaft 4 via the motor, and is then driven at a reduction ratio of 1/2.
またカム軸20とシリンダ列C1,C2との各間
には、カム軸20を挟むようにして左右一対のフ
オロア軸25が配設され、各フオロア軸25に揺
動可能に枢支される吸気用ロツカフオロア26お
よび排気用ロツカフオロア27は、それぞれのフ
オロア軸25を基点として隣接するシリンダ1か
ら遠去かるように延びており、それらの揺動端部
の内側面はカム軸20の吸気用カム20aおよび
排気用カム20bにそれぞれ係合し、それらの外
側面には吸気用プツシユロツド30および排気用
プツシユロツド31の内端がそれぞれ球面連接さ
れる。 Further, a pair of left and right follower shafts 25 are disposed between the camshaft 20 and each of the cylinder rows C 1 and C 2 so as to sandwich the camshaft 20 . The engine rocker follower 26 and the exhaust rocker follower 27 extend away from the adjacent cylinders 1 from the respective follower shafts 25, and the inner surfaces of their swinging ends are connected to the intake cam 20a of the camshaft 20. and exhaust cam 20b, and the inner ends of intake push rod 30 and exhaust push rod 31 are spherically connected to their outer surfaces.
一方、各シリンダヘツド7に支持されるロツカ
軸32には吸気用ロツカアーム33および排気用
ロツカアーム34が枢支され、吸気用ロツカアー
ム33の、吸気マニホールド18側に延出する内
方腕の先端部と中間部に主吸気弁14と副吸気弁
15の上端が当接し、該ロツカアーム33の外方
腕の先端部には前記吸気用プツシユロツド30の
外端が球面連接される。また排気用ロツカアーム
34の内方腕の先端部には排気弁16の上端が当
接し、該ロツカアーム34の外方腕の先端部には
前記排気用プツシユロツド31の外端が球面連接
される。吸気用ロツカアーム33はプツシユロツ
ド30との球面連接部および副吸気弁15との当
接部に弁頭間隙調節ボルト38,39を備えてお
り、排気用ロツカアーム34にはそのようなボル
トは設けられていないが、その代り排気用ロツカ
フオロア27に油圧タペツト機構40が次のよう
に内装される。 On the other hand, an intake rocker arm 33 and an exhaust rocker arm 34 are pivotally supported on the rocker shaft 32 supported by each cylinder head 7. The upper ends of the main intake valve 14 and the auxiliary intake valve 15 abut on the intermediate portion, and the outer end of the intake push rod 30 is spherically connected to the tip of the outer arm of the rocker arm 33. Further, the upper end of the exhaust valve 16 contacts the tip of the inner arm of the exhaust rocker arm 34, and the outer end of the exhaust push rod 31 is spherically connected to the tip of the outer arm of the rocker arm 34. The intake rocker arm 33 is provided with valve head gap adjustment bolts 38 and 39 at the spherical joint with the push rod 30 and at the contact portion with the sub-intake valve 15, and the exhaust rocker arm 34 is not provided with such bolts. However, instead, a hydraulic tappet mechanism 40 is installed in the exhaust rocker follower 27 as follows.
第4図に明示するように、排気用ロツカフオロ
ア27は先端部にその揺動方向に軸線を置く油圧
シリンダ41を有し、それに上下2分割されたピ
ストン42,43が摺合され、上部ピストン42
にプツシユロツド31の内端が球面連接される。
両ピストン42,43間には第1作動油室44
が、また下部のピストン43と油圧シリンダ41
の底部との間には弁孔46を介して第1作動油室
44と連通する第2作動油室45がそれぞれ形成
され、第2作動油室45には、下部ピストン43
を上方に弾発するばね47と、弁孔46をばね4
7の偏倚力を以て閉鎖する逆止弁48が収容さ
れ、第1作動油室44には後述する油孔58,6
5を介して機関の潤滑油が供給される。 As clearly shown in FIG. 4, the exhaust rocker follower 27 has at its tip a hydraulic cylinder 41 whose axis is in the direction of its swing, into which pistons 42 and 43 divided into upper and lower halves are slidably connected.
The inner end of the push rod 31 is connected to the spherical surface.
A first hydraulic oil chamber 44 is provided between both pistons 42 and 43.
However, the lower piston 43 and hydraulic cylinder 41
A second hydraulic oil chamber 45 that communicates with the first hydraulic oil chamber 44 via a valve hole 46 is formed between the bottom of the lower piston 43 and the bottom of the lower piston 43 .
The spring 47 springs the valve hole 46 upward, and the spring 4 springs the valve hole 46 upward.
A check valve 48 that closes with a biasing force of
Lubricating oil for the engine is supplied via 5.
而して、排気用ロツカフオロア27がカム20
bに基礎円上で接しているとき、ピストン42,
43はばね47の弾発力により押し上げられて排
気弁16の弁頭間隙を零にし、それに伴い逆止弁
48が開いて第1作動油室44の油が第2作動油
室45に満たされる。カム20bのリフト作用が
開始すると、逆止弁48が閉じて第2作動油室4
5の油圧が上昇し、ピストン42,43はロツカ
フオロア27と共に揺動し、プツシユロツド31
を突き上げることができる。 Therefore, the exhaust roller lower 27 is connected to the cam 20.
When in contact with b on the base circle, the piston 42,
43 is pushed up by the elastic force of the spring 47 to make the valve head gap of the exhaust valve 16 zero, and accordingly, the check valve 48 opens and the oil in the first hydraulic oil chamber 44 fills the second hydraulic oil chamber 45. . When the lift action of the cam 20b starts, the check valve 48 closes and the second hydraulic oil chamber 4
5 increases, the pistons 42 and 43 swing together with the rocker follower 27, and the push rod 31
can push up.
クランクケース3の一側にはクランク軸4によ
り駆動される油ポンプ53が装備され、この油ポ
ンプ53の吸入口には、クランクケース3下部の
オイルパン54底部に設置したオイルフイルタ5
5から起立する吸入管56が接続される。而し
て、油ポンプ53はオイルパン54に貯留される
潤滑油を吸上げて機関各部に供給し、各部を潤滑
するものであるが、ここでは前記動弁機構の潤滑
についてのみ説明する。 An oil pump 53 driven by the crankshaft 4 is installed on one side of the crankcase 3, and an oil filter 5 installed at the bottom of an oil pan 54 at the bottom of the crankcase 3 is connected to the suction port of this oil pump 53.
A suction pipe 56 standing up from 5 is connected. The oil pump 53 sucks up lubricating oil stored in the oil pan 54 and supplies it to each part of the engine to lubricate each part, but only the lubrication of the valve mechanism will be described here.
第1図に示すようにフオロア軸25には、その
軸心部を通る油孔57と、それから放射状に延び
て外周面に開口する複数本の油孔58とが設けら
れており、上記油孔57に油ポンプ53から潤滑
油が供給されるようになつている。また吸気用ロ
ツカフオロア26には、その軸受面と吸気用プツ
シユロツド30に対する連接面とを連通する油孔
59が設けられ、さらに吸気用プツシユロツド3
0にはその軸心部を通つてロツカフオロア26お
よびロツカアーム33との両連接面を連通する油
孔60が設けられ、その油孔60の大部分はプツ
シユロツド30の金属パイプ製棒状部の中空部よ
り構成される。また吸気用ロツカアーム33には
その軸受面とプツシユロツド30に対する連接面
とを連通する油孔61が設けられ、ロツカ軸32
には、その軸心部を通る油孔62と、それから放
射状に延びて外周面に開口する複数本の油孔63
とが設けられ、上記油孔57〜63によつて、フ
オロア軸25、ロツカフオロア26、プツシユロ
ツド30、ロツカアーム33およびロツカ軸32
の相互接触部を通る一連の給油路64が構成され
る。 As shown in FIG. 1, the follower shaft 25 is provided with an oil hole 57 passing through its axial center, and a plurality of oil holes 58 extending radially from the oil hole 57 and opening on the outer peripheral surface. 57 is supplied with lubricating oil from the oil pump 53. Further, the intake rocker follower 26 is provided with an oil hole 59 that communicates its bearing surface with a connecting surface to the intake push rod 30.
0 is provided with an oil hole 60 that communicates both the connecting surfaces with the rocker follower 26 and the rocker arm 33 through its axial center, and most of the oil hole 60 is formed in the hollow part of the metal pipe rod-shaped part of the push rod 30. configured. Further, the intake rocker arm 33 is provided with an oil hole 61 that communicates between its bearing surface and the connecting surface to the push rod 30.
has an oil hole 62 passing through its axial center, and a plurality of oil holes 63 extending radially from the oil hole 62 and opening on the outer peripheral surface.
The oil holes 57 to 63 allow the follower shaft 25, rocker follower 26, push rod 30, rocker arm 33, and rocker shaft 32 to be
A series of oil supply passages 64 are constructed through the mutual contact portions of the .
一方、排気用ロツカフオロア27には、第4図
に示すように、フオロア軸25の油孔58と油圧
タペツト機構40の第1作動油室44間を連通す
る油孔65が設けられ、上部ピストン42には、
それと油圧シリンダ41間の漏油間隙66と排気
用プツシユロツド31に対する連接面とを連通す
る油孔67が設けられ、また排気用プツシユロツ
ド31およびロツカアーム34には吸気用の場合
と同様の油孔68,69が設けられ、油孔69は
ロツカ軸32の油孔63に連通する。而して、上
記油孔57,58,65,67〜69、第1作動
油室44および漏油間隙66は、フオロア軸2
5、ロツカフオロア27、プシユロツド31およ
びロツカ軸32の相互接触部を通る一連の給油路
70を構成する。 On the other hand, the exhaust rocker follower 27 is provided with an oil hole 65 that communicates between the oil hole 58 of the follower shaft 25 and the first hydraulic oil chamber 44 of the hydraulic tappet mechanism 40, as shown in FIG. for,
An oil hole 67 is provided which communicates the oil leakage gap 66 between the hydraulic cylinder 41 and the connecting surface to the exhaust push rod 31, and the exhaust push rod 31 and the rocker arm 34 are provided with an oil hole 68 similar to that for the intake. 69 is provided, and the oil hole 69 communicates with the oil hole 63 of the rocker shaft 32. The oil holes 57, 58, 65, 67 to 69, the first hydraulic oil chamber 44, and the oil leakage gap 66 are connected to the follower shaft 2.
5. A series of oil supply passages 70 are formed that pass through the mutual contact portions of the rocker follower 27, the push rod 31, and the rocker shaft 32.
尚、図中50はヘツドカバー、51は排気ポー
ト13に連なる排気マニホールドである。 In the figure, 50 is a head cover, and 51 is an exhaust manifold connected to the exhaust port 13.
次にこの実施例の作用を説明すると、クランク
軸4から調時伝動装置24を介してカム軸20が
回転され、それの吸、排気用カム20a,20b
がリフト作用を開始すると、吸、排気用ロツカフ
オロア26,27がそれぞれ上方へ揺動されて
吸,排気用プツシユロツド30,31を突き上げ
る。この吸気用プツシユロツド30の突き上げに
よれば、吸気用ロツカアーム33が揺動して主,
副吸気弁14,15を閉弁ばね35,36に抗し
て開き、また排気用プツシユロツド31の突き上
げによれば、排気用ロツカアーム34が揺動して
排気弁16を閉弁ばね37に抗して開く。そして
カム20a,20bのリフト作用が終われば、各
弁14,15,16はそれぞれの閉弁ばね35,
36,37の弾発力により閉じることができる。 Next, to explain the operation of this embodiment, the camshaft 20 is rotated from the crankshaft 4 via the timing transmission 24, and the intake and exhaust cams 20a and 20b of the camshaft 20 are rotated from the crankshaft 4 via the timing transmission 24.
When the lift action starts, the suction and exhaust rocker followers 26 and 27 are respectively swung upward and push up the suction and exhaust push rods 30 and 31. When the intake push rod 30 is pushed up, the intake rocker arm 33 swings and the main
When the auxiliary intake valves 14 and 15 are opened against the valve closing springs 35 and 36, and when the exhaust push rod 31 is pushed up, the exhaust rocker arm 34 swings to open the exhaust valve 16 against the valve closing spring 37. Open it. Then, when the lifting action of the cams 20a, 20b is finished, each valve 14, 15, 16 is released by its respective valve closing spring 35,
It can be closed by the elastic force of 36 and 37.
この間、油ポンプ53はオイルパン54から潤
滑油を吸上げて、その一部をフオロア軸25の油
孔57に供給する。これにより給油路64を通過
していく潤滑油はフオロア軸25、吸気用ロツカ
フオロア26、プツシユロツド30、ロツカアー
ム33、ロツカ軸32の相互接触部より適量漏洩
しながら各接触面を潤滑し、また給油路70を通
過していく潤滑油もフオロア軸25、排気用ロツ
カフオロア27、タペツト42、プツシユロツド
31、ロツカーム34、ロツカ軸32の相互接触
部より適量漏洩しながら各接触面を潤滑する。そ
して潤滑を終えた油はすべてオイルパン54に還
流する。 During this time, the oil pump 53 sucks up lubricating oil from the oil pan 54 and supplies a portion of it to the oil hole 57 of the follower shaft 25. As a result, the lubricating oil passing through the oil supply path 64 leaks an appropriate amount from the mutual contact portions of the follower shaft 25, intake rocker follower 26, push rod 30, rocker arm 33, and rocker shaft 32, lubricating each contact surface, and also lubricates each contact surface. The lubricating oil passing through 70 also leaks in an appropriate amount from the mutual contact portions of the follower shaft 25, the exhaust rocker follower 27, the tappet 42, the push rod 31, the rocker arm 34, and the rocker shaft 32, lubricating each contact surface. All the oil that has been lubricated returns to the oil pan 54.
主、副吸気弁14,15が開かれるときは、そ
れらに対応するシリンダ1におけるピストン5の
吸入行程に当るので、前記希薄混合気が主吸気ポ
ート11を通して主燃焼室8に、また前記濃厚混
合気が副吸気ポート12を通して副燃焼室9にそ
れぞれ供給される。そして、次の圧縮行程で副燃
焼室9内の濃厚混合気が点火栓17の放電により
着火され、その火炎がトーチノズル10を通して
主燃焼室8に噴入し、該室8内の希薄混合気を着
火燃焼させる。その結果総合空燃比が希薄な混合
気の燃焼が可能となる。こうしてピストン5は膨
脹行程に移り、次の排気行程で排気弁16が前述
のように開かれるので、既燃ガスが排気ポート1
3へ排出される。 When the main and auxiliary intake valves 14 and 15 are opened, this corresponds to the intake stroke of the piston 5 in the corresponding cylinder 1, so that the lean mixture passes through the main intake port 11 and enters the main combustion chamber 8, and the rich mixture Air is supplied to the sub-combustion chambers 9 through the sub-intake ports 12, respectively. Then, in the next compression stroke, the rich mixture in the auxiliary combustion chamber 9 is ignited by the discharge of the spark plug 17, and the flame is injected into the main combustion chamber 8 through the torch nozzle 10, igniting the lean mixture in the chamber 8. Ignite and burn. As a result, combustion of a mixture with a lean overall air-fuel ratio becomes possible. In this way, the piston 5 moves to the expansion stroke, and in the next exhaust stroke, the exhaust valve 16 is opened as described above, so that the burned gas flows into the exhaust port 1.
It is discharged to 3.
C 発明の効果
以上のように本発明によれば、クランク軸に連
動するカム軸をシリンダの一側に配設し、このカ
ム軸に隣接して配置したフオロア軸に、前記カム
軸に係合するロツカフオロアを揺動可能に枢支
し、このロツカフオロアと、シリンダヘツド上の
ロツカ軸に枢支されて吸気弁または排気弁に連動
するロツカアームとの間をプツシユロツドを介し
て連接してなる内燃機関において、前記フオロア
軸、ロツカフオロア、プツシユロツド、ロツカア
ーム及びロツカ軸には、それらの相互接触部を通
る一連の給油路が穿設されると共に、この給油路
の、フオロア軸側の一端が油ポンプに連通され、
前記ロツカフオロアは油圧タペツト機構を備え、
このタペツト機構の作動油室及び漏油間隙を前記
給油路の一部として機能させるべく、該作動油室
が前記ロツカフオロア内の前記給油路に、また該
漏油間隙が前記プツシユロツド内の前記給油路に
それぞれ連通されるので、揺動式ロツカフオロア
はフオロア軸回りに回転摺動するものであつて、
その摺動量が僅かであり、従つて該回転摺動部を
通して上記給油路から漏洩する潤滑油量を少なく
して潤滑効率を高めることができる。また油圧タ
ペツト機構に供給される作動油を、カム軸からロ
ツカアームに至る動弁系の潤滑にそのまま利用す
ることができる上、その油圧式タペツト機構の作
動油室および漏油間隙を上記給油路の一部として
兼用することができるから、それだけ装置の構造
が簡素化されコストダウンに寄与し得る。C. Effects of the Invention As described above, according to the present invention, a camshaft interlocking with the crankshaft is disposed on one side of the cylinder, and a follower shaft disposed adjacent to the camshaft is engaged with the camshaft. In an internal combustion engine, a rocker follower is swingably supported, and the rocker follower and a rocker arm, which is pivotally supported on a rocker shaft on a cylinder head and is linked to an intake valve or an exhaust valve, are connected via a push rod. A series of oil supply passages are drilled through the follower shaft, the rocker follower, the push rod, the rocker arm, and the rocker shaft through their mutual contact portions, and one end of the oil supply passage on the follower shaft side is communicated with an oil pump. ,
The rock follower is equipped with a hydraulic tappet mechanism,
In order to make the hydraulic oil chamber and oil leakage gap of this tappet mechanism function as a part of the oil supply passage, the hydraulic oil chamber is connected to the oil supply passage in the rocker follower, and the oil leakage gap is connected to the oil supply passage in the push rod. The rocker follower rotates and slides around the follower axis.
The amount of sliding is small, and therefore the amount of lubricating oil leaking from the oil supply path through the rotating sliding portion can be reduced and the lubrication efficiency can be increased. In addition, the hydraulic oil supplied to the hydraulic tappet mechanism can be used as is for lubricating the valve system from the camshaft to the rocker arm, and the hydraulic oil chamber and oil leakage gap of the hydraulic tappet mechanism can be used as is in the oil supply path. Since it can be used as a part, the structure of the device can be simplified and the cost can be reduced.
第1図は本発明装置を備えたV型多気筒内燃機
関の横断正面図、第2図はその縦断側面図、第3
図はヘツドカバーを外した一方のシリンダ列の拡
大平面図、第4図は油圧タペツト機構を持つ排気
用ロツカフオロアの拡大縦断面図である。
1……シリンダ、4……クランク軸、7……シ
リンダヘツド、14……吸気弁、16……排気
弁、20……カム軸、25……フオロア軸、2
6,27……ロツカフオロア、30,31……プ
ツシユロツド、32……ロツカ軸、33,34…
…ロツカアーム、40……油圧タペツト機構、4
4……作動油室、53……油ポンプ、64,70
……給油路、66……漏油間隙。
FIG. 1 is a cross-sectional front view of a V-type multi-cylinder internal combustion engine equipped with the device of the present invention, FIG. 2 is a longitudinal cross-sectional side view thereof, and FIG.
The figure is an enlarged plan view of one cylinder row with the head cover removed, and FIG. 4 is an enlarged longitudinal sectional view of the exhaust rocker follower having a hydraulic tappet mechanism. 1... Cylinder, 4... Crankshaft, 7... Cylinder head, 14... Intake valve, 16... Exhaust valve, 20... Camshaft, 25... Follower shaft, 2
6, 27...Rotsuka follower, 30, 31...Pushy rod, 32...Rotsuka axis, 33,34...
...Rotsuka arm, 40...Hydraulic tappet mechanism, 4
4... Hydraulic oil chamber, 53... Oil pump, 64, 70
...Oil supply path, 66...Oil leakage gap.
Claims (1)
ダ1の一側に配設し、このカム軸20に隣接して
配置したフオロア軸25に、前記カム軸20に係
合するロツカフオロア26,27を揺動可能に枢
支し、このロツカフオロア26,27と、シリン
ダヘツド7上のロツカ軸32に枢支されて吸気弁
14または排気弁16に連動するロツカアーム3
3,34との間をプツシユロツド30,31を介
して連接してなる内燃機関において、前記フオロ
ア軸25、ロツカフオロア26,27、プツシユ
ロツド30,31、ロツカアーム33,34及び
ロツカ軸32には、それらの相互接触部を通る一
連の給油路64,70が穿設されると共に、この
給油路64,70の、フオロア軸25側の一端が
油ポンプ53に連通され、前記ロツカフオロア2
6,27は油圧タペツト機構40を備え、このタ
ペツト機構40の作動油室44及び漏油間隙66
を前記給油路64,70の一部として機能させる
べく、該作動油室44が前記ロツカフオロア2
6,27内の前記給油路64,70に、また該漏
油間隙66が前記プツシユロツド30,31内の
前記給油路64,70にそれぞれ連通されること
を特徴とする、内燃機関における潤滑装置。1. A camshaft 20 that interlocks with the crankshaft 4 is disposed on one side of the cylinder 1, and rocker followers 26 and 27 that engage with the camshaft 20 are rocked to a follower shaft 25 that is disposed adjacent to the camshaft 20. A rocker arm 3 is movably supported, and is pivotally supported by the rocker followers 26 and 27 and a rocker shaft 32 on the cylinder head 7 to interlock with the intake valve 14 or the exhaust valve 16.
3, 34 are connected via push rods 30, 31, the follower shaft 25, rocker followers 26, 27, push rods 30, 31, rocker arms 33, 34, and rocker shaft 32 have A series of oil supply passages 64 and 70 passing through the mutual contact portion are drilled, and one end of the oil supply passages 64 and 70 on the follower shaft 25 side is communicated with the oil pump 53, and the oil supply passages 64 and 70 are connected to the oil pump 53.
6 and 27 are equipped with a hydraulic tappet mechanism 40, and a hydraulic oil chamber 44 and an oil leakage gap 66 of this tappet mechanism 40 are provided.
In order to function as a part of the oil supply passages 64 and 70, the hydraulic oil chamber 44 is connected to the oil supply passages 64 and 70.
6, 27, and the oil leakage gap 66 is communicated with the oil supply passages 64, 70 in the push rods 30, 31, respectively.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1264881A JPS57126514A (en) | 1981-01-30 | 1981-01-30 | Lubricator for moving valve mechanism of internal combustion engine |
US06/342,785 US4449491A (en) | 1981-01-30 | 1982-01-26 | Lubricating device for internal combustion engine |
DE3203312A DE3203312C2 (en) | 1981-01-30 | 1982-01-29 | A lubricating oil distribution system for an internal combustion engine fed by a lubricating oil pump |
CA000395168A CA1182009A (en) | 1981-01-30 | 1982-01-29 | Lubricating device for internal combustion engine |
GB8202554A GB2094903B (en) | 1981-01-30 | 1982-01-29 | Lubrication system of ic engine |
FR8201446A FR2499150B1 (en) | 1981-01-30 | 1982-01-29 | LUBRICATION DEVICE FOR AN INTERNAL COMBUSTION ENGINE COMPRISING LUBRICATION OF CAMSHAFT BEARINGS AND TUMBLERS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1264881A JPS57126514A (en) | 1981-01-30 | 1981-01-30 | Lubricator for moving valve mechanism of internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57126514A JPS57126514A (en) | 1982-08-06 |
JPH0120290B2 true JPH0120290B2 (en) | 1989-04-14 |
Family
ID=11811181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1264881A Granted JPS57126514A (en) | 1981-01-30 | 1981-01-30 | Lubricator for moving valve mechanism of internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57126514A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60178911A (en) * | 1984-02-24 | 1985-09-12 | Honda Motor Co Ltd | O.h.c. type tappet mechanism of multi-cylinder internal- combustion engine |
US6491011B2 (en) | 2000-11-16 | 2002-12-10 | Honda Giken Kogyo Kabushiki Kaisha | Valve system for engine |
CN104806316A (en) * | 2015-04-26 | 2015-07-29 | 姬爱书 | Wear-resistant valve rocker arm |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5939130Y2 (en) * | 1979-03-02 | 1984-10-31 | 富士重工業株式会社 | Lubricating oil leak prevention device in internal combustion engine valve train |
-
1981
- 1981-01-30 JP JP1264881A patent/JPS57126514A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS57126514A (en) | 1982-08-06 |
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