JPS622254Y2 - - Google Patents
Info
- Publication number
- JPS622254Y2 JPS622254Y2 JP1981155836U JP15583681U JPS622254Y2 JP S622254 Y2 JPS622254 Y2 JP S622254Y2 JP 1981155836 U JP1981155836 U JP 1981155836U JP 15583681 U JP15583681 U JP 15583681U JP S622254 Y2 JPS622254 Y2 JP S622254Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve bridge
- bridge
- breathing hole
- lubricating oil
- 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
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 41
- 239000010687 lubricating oil Substances 0.000 claims description 31
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 16
- 230000006870 function Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000002000 scavenging effect Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
(産業上の利用分野)
本考案はバルブブリツジの呼吸孔構造に関す
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a breathing hole structure of a valve bridge.
(従来技術及びその問題点)
従来のバルブブリツジの呼吸孔は実開昭54−
93636に示されているように、2つの噴気孔(呼
吸孔)はVの字形に形成され、どちらもその上端
部が上方に向かつて開口すると共に上端部に油受
け用の凹部を備えている。従つて両噴気孔が共に
潤滑油の流入孔と排出孔の役目を果すことにな
り、上端油受け用の凹部に油が溜まつて内部空間
に流入しようとするのに対抗して、同一噴気孔内
で油を噴出しようとするので、潤滑油の流れが悪
くなる。そのために内部空間に潤滑油が多量に溜
つてしまい、内部空間の掃気性が低下して呼吸効
率が悪くなり、バルブの動作にも影響を及ぼす。(Prior art and its problems) The breathing hole of the conventional valve bridge was developed in 1974.
As shown in 93636, the two fumarole holes (breathing holes) are formed in a V shape, both of which open upward at their upper ends and have a recessed portion at the upper end for receiving oil. . Therefore, both jet holes serve as inflow and discharge holes for lubricating oil, and while oil accumulates in the upper oil receiving recess and attempts to flow into the internal space, the same jet As the oil tries to squirt out inside the hole, the flow of lubricating oil becomes poor. As a result, a large amount of lubricating oil accumulates in the internal space, reducing the scavenging performance of the internal space, resulting in poor breathing efficiency and affecting valve operation.
(考案の目的)
本考案の目的はバルブブリツジ内に内部空間と
外部との間で潤滑油が円滑に流通するようにする
ことにより、掃気性を向上し、呼吸効率を良くす
ることである。(Purpose of the invention) The purpose of the invention is to improve the scavenging performance and breathing efficiency by allowing lubricating oil to smoothly flow between the internal space and the outside of the valve bridge.
また弁腕ケース内からの油漏れの防止及び呼吸
孔の加工の容易化も本考案の目的である。 Another object of the present invention is to prevent oil leakage from inside the valve arm case and to facilitate machining of the breathing hole.
(目的を達成するための手段)
上記目的を達成するために本考案は、弁腕ケー
ス2により覆われてた弁腕室8内、弁腕室中央部
の燃料噴射バルブ41から間隔を隔てて垂直な固
定軸21を設け、該固定軸21の外周側に上下動
自在に嵌合し弁腕10,40の動作を吸気弁22
又は排気弁に伝えるバルブブリツジにおいて、バ
ルブブリツジ内に、固定軸21によつて下側が閉
塞されると共にバルブブリツジの上下運動によつ
て容積が変化する内部空間Sを形成し、内部空間
Sと弁腕室8内とを連通する概ね水平な呼吸孔3
5をバルブブリツジ壁部分に形成し、上記呼吸孔
35を、噴射バルブ41が位置する弁腕室中央部
側に向けて開口し、上記呼吸孔35とは反対側の
弁腕ケース側壁に近いバルブブリツジ壁部分に、
バルブブリツジ上端面からバルブブリツジ内部空
間Sに至る略L字型の潤滑油供給孔36を形成し
てバルブブリツジ上端面に溜る潤滑油を内部空間
Sに導くようにし、供給孔36の下端水平部分を
呼吸孔35と概ね同一直線上に形成している。(Means for Achieving the Object) In order to achieve the above object, the present invention provides a valve arm chamber 8 covered by the valve arm case 2, which is located at a distance from the fuel injection valve 41 in the center of the valve arm chamber. A vertical fixed shaft 21 is provided, and is fitted onto the outer circumferential side of the fixed shaft 21 so as to be movable up and down.
Alternatively, in the valve bridge that communicates with the exhaust valve, an internal space S whose lower side is closed by the fixed shaft 21 and whose volume changes as the valve bridge moves up and down is formed in the valve bridge, and the internal space S and the valve arm chamber 8 are connected to each other. A generally horizontal breathing hole 3 that communicates with the inside
5 is formed in the valve bridge wall portion, the breathing hole 35 is opened toward the central part of the valve arm chamber where the injection valve 41 is located, and the valve bridge wall is close to the side wall of the valve arm case on the opposite side from the breathing hole 35. In part,
A substantially L-shaped lubricating oil supply hole 36 extending from the upper end surface of the valve bridge to the internal space S of the valve bridge is formed to guide the lubricating oil accumulated on the upper end surface of the valve bridge to the internal space S, and the horizontal portion of the lower end of the supply hole 36 is formed as a breathing hole. 35 and is formed approximately on the same straight line.
(作用)
機関運転中、バルブブリツジ内部空間Sには上
端開口状の垂直な潤滑油供給孔36から潤滑油が
流入し、バルブブリツジ内部空間Sから排出され
る潤滑油は殆んどが水平な呼吸孔35から排出さ
れ、円滑に潤滑油が流通し、呼吸効率が向上す
る。(Function) During engine operation, lubricating oil flows into the valve bridge internal space S from the vertical lubricating oil supply hole 36 with an opening at the top, and most of the lubricating oil discharged from the valve bridge internal space S flows through the horizontal breathing hole. 35, lubricating oil flows smoothly and breathing efficiency is improved.
また水平な呼吸孔35は弁腕ケース2の中央部
に向いていることにより、潤滑油は弁腕ケース2
の側壁には直接吹きかけられず、潤滑油漏れの心
配はない。 In addition, since the horizontal breathing hole 35 faces the center of the valve arm case 2, lubricating oil can be transferred to the valve arm case 2.
There is no need to worry about lubricant leaking as it cannot be sprayed directly onto the side walls of the lubricant.
(実施例)
内燃機関上端部分の縦断面(第2図の略−
断面)を示す第1図において、シリンダヘツド1
の上端面に弁腕ケース2が固着されており、弁腕
ケース2の上側にはケースカバー3がパツキン4
を介して配置されている。このケースカバー3は
締付金具6により弁腕ケース2に着脱自在に取り
付けられている。即ち支軸ホルダー5をシリンダ
ヘツド1に固着するためのボルト7の上端にめね
じが形成されていて、ケースカバー3の上側から
弁腕室8内へ挿通した締付金具6の下端おねじ部
をボルト7の上端に螺着することにより、ケース
カバー3を上側から締め付けている。(Example) Longitudinal section of the upper end portion of the internal combustion engine (abbreviated in Figure 2)
In FIG. 1 showing the cross section), the cylinder head 1
A valve arm case 2 is fixed to the upper end surface, and a case cover 3 is attached to a gasket 4 on the upper side of the valve arm case 2.
is located through. This case cover 3 is detachably attached to the valve arm case 2 with a fastening fitting 6. That is, a female thread is formed at the upper end of the bolt 7 for fixing the spindle holder 5 to the cylinder head 1, and a male thread at the lower end of the tightening fitting 6 inserted from the upper side of the case cover 3 into the valve arm chamber 8. The case cover 3 is tightened from above by screwing it onto the upper end of the bolt 7.
支軸ホルダー5に固着された支軸9には吸気弁
腕10が回動自在に支承され、吸気弁腕10の一
端にはタペツト11が当接し、他端には凹面軸受
12及び球13を介してバルブブリツジ15の押
え金具16が当接している。 An intake valve arm 10 is rotatably supported on a support shaft 9 fixed to the support shaft holder 5. A tappet 11 is in contact with one end of the intake valve arm 10, and a concave bearing 12 and a ball 13 are connected to the other end. A presser metal fitting 16 of the valve bridge 15 is in contact with the valve bridge 15 via the valve bridge 15.
バルブブリツジ15には上記押え金具16によ
り上端が封鎖された下開きのガイド孔20が形成
されており、バルブブリツジ15はシリンダヘツ
ド1に固着された垂直な固定軸21に上下動自在
に嵌合している。バルブブリツジ15の両腕部1
5a,15bは1対の吸気弁22の上端にそれぞ
れ当接している。支軸9から遠い側の腕部15b
には弁隙間調節ねじ23が螺挿されており、支軸
9より遠い側の吸気弁22は弁隙間調節ねじ23
を介して腕部15bに当接している。吸気弁22
の上端部分にはばね受座25が固着されており、
ばね受座25とシリンダヘツド1の上面の間及び
ばね受座25と弁ガイド26のフランジ部の間に
それぞれ弁ばね27,28が縮設され、弁ばね2
7,28の弾性力により吸気弁22及びバルブブ
リツジ15を上方へ押している。 The valve bridge 15 is formed with a downwardly opening guide hole 20 whose upper end is closed by the presser fitting 16, and the valve bridge 15 is fitted onto a vertical fixed shaft 21 fixed to the cylinder head 1 so as to be movable up and down. There is. Both arms 1 of valve bridge 15
5a and 15b are in contact with the upper ends of the pair of intake valves 22, respectively. Arm portion 15b on the side far from the support shaft 9
A valve clearance adjustment screw 23 is screwed into the intake valve 22 on the side farther from the support shaft 9.
It is in contact with the arm portion 15b via. Intake valve 22
A spring catch 25 is fixed to the upper end of the
Valve springs 27 and 28 are compressed between the spring seat 25 and the upper surface of the cylinder head 1 and between the spring seat 25 and the flange portion of the valve guide 26, respectively.
The elastic forces of 7 and 28 push the intake valve 22 and valve bridge 15 upward.
吸気弁腕10には支軸9との嵌合部分から凹面
軸受12内の油路29に至る潤滑油路30が形成
されており、上記凹面軸受12の油路29は軸受
12と球13の嵌合部分に開口している。即ち潤
滑油ポンプから適宜の油路を介して支軸9と吸気
弁腕10との嵌合部分に送られてきた潤滑油は、
油路30,29を通つて球13と軸受12の嵌合
部分に送られ、押え金具16上に落ちる。 A lubricating oil passage 30 is formed in the intake valve arm 10 from the fitting part with the support shaft 9 to an oil passage 29 in the concave bearing 12. There is an opening in the mating part. That is, the lubricating oil sent from the lubricating oil pump to the fitting part between the support shaft 9 and the intake valve arm 10 through an appropriate oil path is as follows.
The oil is sent through the oil passages 30 and 29 to the fitting portion between the ball 13 and the bearing 12, and falls onto the presser fitting 16.
バルブブリツジ15には押え金具16の近接部
分から吸気弁22との当接部分に至る潤滑油路3
2が形成されると共に、バルブブリツジ15の内
部空間Sと弁腕室8を連通する呼吸孔35と、第
3図に示すようにバルブブリツジ15上端の押え
金具16近傍部分から内部空間Sに至る潤滑油供
給孔36が形成されている。即ち第1図の−
断面部分拡大図である第3図において、呼吸孔3
5はバルブブリツジ15の中心線Oに対し直交す
るように形成され、一方供給孔36は中心線Oに
対し呼吸孔35と対称な部分に「L」字型に形成
され、しかも供給孔36の下端水平部分は呼吸孔
35と同一直線上に形成されている。呼吸孔35
と供給孔36を加工するときには、第3図の右側
からドリルを突き立てて呼吸孔35を加工する工
程で給油孔36の下端水平部分を加工し、そして
給油孔36の上部垂直部分を下方から孔明加工す
る。 The valve bridge 15 has a lubricating oil passage 3 extending from a portion adjacent to the holding fitting 16 to a portion in contact with the intake valve 22.
2 is formed, and a breathing hole 35 that communicates the internal space S of the valve bridge 15 with the valve arm chamber 8, and a lubricating oil that flows from the upper end of the valve bridge 15 near the holding fitting 16 to the internal space S as shown in FIG. A supply hole 36 is formed. In other words, - in Figure 1
In FIG. 3, which is an enlarged cross-sectional view, the breathing hole 3
5 is formed to be perpendicular to the center line O of the valve bridge 15, while the supply hole 36 is formed in an "L" shape at a portion symmetrical to the breathing hole 35 with respect to the center line O, and the lower end of the supply hole 36 The horizontal portion is formed on the same straight line as the breathing hole 35. Breathing hole 35
When machining the supply hole 36, the lower horizontal part of the oil supply hole 36 is machined in the process of drilling the breathing hole 35 by inserting a drill from the right side in FIG. Perform perforation processing.
上述の凹面軸受12等から落下した潤滑油は、
給油孔36を通つて内部空間S内に入り、バルブ
ブリツジ15と固定軸21の嵌合部分を潤滑す
る。内部空間S内に溜まる潤滑油の一部は、バル
ブブリツジ15の下降時内部空間Sの容積が縮小
される際に、呼吸孔35を通つて弁腕室8内に噴
き出される。なお呼吸孔35の一般的な機能は、
バルブブリツジ15の上下運動により容積が変化
する内部空間Sの圧力を一定に保ち、バルブブリ
ツジ15を円滑に上下運動させることである。即
ちバルブブリツジ15が下降して内部空間Sが縮
小する際には呼吸孔35を介して内部空間S内の
空気を弁腕室8に排出し、バルブブリツジ15が
上昇して内部空間Sが拡大する際には呼吸孔35
を介して弁腕室8から内部空間S内に空気を吸い
込むのである。 The lubricating oil that has fallen from the above-mentioned concave bearing 12, etc.
It enters the internal space S through the oil supply hole 36 and lubricates the fitting portion between the valve bridge 15 and the fixed shaft 21. A part of the lubricating oil accumulated in the internal space S is blown out into the valve arm chamber 8 through the breathing hole 35 when the volume of the internal space S is reduced when the valve bridge 15 is lowered. The general function of the breathing hole 35 is as follows:
The purpose is to keep constant the pressure in the internal space S whose volume changes due to the vertical movement of the valve bridge 15, and to smoothly move the valve bridge 15 up and down. That is, when the valve bridge 15 descends and the internal space S contracts, the air in the internal space S is discharged into the valve arm chamber 8 through the breathing hole 35, and when the valve bridge 15 rises and the internal space S expands, the air in the internal space S is discharged through the breathing hole 35. There are 35 breathing holes in
Air is sucked into the internal space S from the valve arm chamber 8 through the valve arm chamber 8.
第2図はケースカバー3を取り外した状態で示
す第1図の矢視上面図であり、この第2図にお
いて、弁腕ケース2内には前述の吸気弁腕10と
共に、吸気弁腕10と略平行な排気弁腕40が支
軸9に支承されており、排気弁腕40は操縦側
(第2図の左側)と反対側部分が吸気弁腕10よ
り少し長い。排気弁腕40に当接するバルブブリ
ツジ15′は吸気弁腕10に当接するバルブブリ
ツジ15と全く同じ構造のものが採用されている
が、両バルブブリツジ15,15′はその呼吸孔
35,35′がそれぞれ弁腕室8の中央部側、例
えば燃料噴射バルブ41側に向くような状態に配
置されている。即ち排気側のバルブブリツジ1
5′は吸気側のバルブブリツジ15と同じ状態か
らバルブブリツジ中心線O′回りに180゜回動させ
た状態で配置されている。しかも排気側のバルブ
ブリツジ15′はその弁隙間調節ねじ23′が内燃
機関操縦側(第2図の左側)にくるように配置さ
れ、吸気側のバルブブリツジ15はその弁隙間調
節ねじ23が第2図の右側にくるように配置され
ている。また排気側のバルブブリツジ15′の弁
隙間調節ねじ23′を回すときに排気弁腕40が
邪魔にならないように、弁隙間調節ねじ23′の
位置は排気弁腕40の直下の位置からずらされて
いる。即ち排気側バルブブリツジ15′の腕部1
5′a,15′bの長さ方向は排気弁腕40の長さ
方向に対し第2図の紙面内で傾いており、従つて
吸気側バルブブリツジ15の腕部15a,15b
の長さ方向も吸気弁腕10の長さ方向に対し排気
側と同じ角度だけ傾いている。 FIG. 2 is a top view of FIG. 1 shown with the case cover 3 removed, and in this FIG. A substantially parallel exhaust valve arm 40 is supported on the support shaft 9, and the portion of the exhaust valve arm 40 on the side opposite to the control side (left side in FIG. 2) is slightly longer than the intake valve arm 10. The valve bridge 15' that abuts the exhaust valve arm 40 has exactly the same structure as the valve bridge 15 that abuts the intake valve arm 10, but both valve bridges 15, 15' have breathing holes 35, 35' that are connected to the valve, respectively. It is arranged so as to face the central portion of the arm chamber 8, for example, toward the fuel injection valve 41 side. That is, the valve bridge 1 on the exhaust side
5' is arranged in a state rotated by 180 degrees around the valve bridge center line O' from the same state as the valve bridge 15 on the intake side. Moreover, the valve bridge 15' on the exhaust side is arranged so that its valve clearance adjustment screw 23' is on the internal combustion engine control side (the left side in FIG. It is placed to the right of the In addition, the position of the valve clearance adjustment screw 23' is shifted from the position directly below the exhaust valve arm 40 so that the exhaust valve arm 40 does not get in the way when turning the valve clearance adjustment screw 23' of the valve bridge 15' on the exhaust side. There is. That is, the arm portion 1 of the exhaust side valve bridge 15'
The length direction of 5'a, 15'b is inclined with respect to the length direction of the exhaust valve arm 40 in the paper plane of FIG.
The length direction of the intake valve arm 10 is also inclined at the same angle as the exhaust side.
吸、排気弁腕10,40が作動して呼吸孔3
5,35′から潤滑油が噴き出される場合には、
弁腕室8の中央部側の燃料噴射ポンプ41に向い
噴き出される。即ち吸気側バルブブリツジ15で
は吸気側バルブブリツジ15に最も近い弁腕ケー
ス部分A側と反対側に向けてのみ噴き出し、排気
側バルブブリツジ15′では排気側のバルブブリ
ツジ15′に最も近い弁腕ケース部分Bと反対側
に向けてのみ噴き出す。従つて弁腕ケース2に潤
滑油が直接吹き付けられることはなく、弁腕ケー
ス2とケースカバー3の間から潤滑油が漏れるこ
とはない。また第2図に示す実施例では、吸気側
バルブブリツジ15よりも操縦側(第2図左側)
から遠い位置にある排気側バルブブリツジ15′
をその弁隙間調節ねじ23′が操縦側にくるよう
に配置しているので、操縦側から手を伸ばして弁
隙間調節ねじ23′を回す作業がし易くなる。 The intake and exhaust valve arms 10 and 40 operate to open the breathing hole 3.
If lubricating oil is spouted from 5, 35',
The fuel is injected toward the fuel injection pump 41 at the center of the valve arm chamber 8 . That is, at the intake side valve bridge 15, the air is ejected only toward the side opposite to the valve arm case portion A closest to the intake side valve bridge 15, and at the exhaust side valve bridge 15', the air is emitted opposite to the valve arm case portion B closest to the exhaust side valve bridge 15'. Spray only towards the side. Therefore, the lubricating oil is not directly sprayed onto the valve arm case 2, and no lubricating oil leaks from between the valve arm case 2 and the case cover 3. In addition, in the embodiment shown in FIG. 2, the control side (left side in FIG. 2) is closer to the intake side valve bridge 15.
Exhaust side valve bridge 15' located far from
Since the valve clearance adjusting screw 23' is arranged so as to be on the operating side, it becomes easy to reach out from the operating side and turn the valve clearance adjusting screw 23'.
(考案の効果)
以上説明したように本考案によると:
(1) 呼吸孔35を概ね水平に形成し、一方の潤滑
油供給孔36をL字型に形成してその上向き開
口状の上端部から潤滑油を流入するように構成
しているので、呼吸孔35は内部空間S内の油
の排出専門に作用し、供給孔36は油の排出作
用よりも油の流入作用が主として行なわれる。(Effects of the invention) As explained above, according to the invention: (1) The breathing hole 35 is formed generally horizontally, one lubricating oil supply hole 36 is formed in an L-shape, and the upper end of the upwardly opening shape is formed. Since the lubricating oil is configured to flow in from the inner space S, the breathing hole 35 functions exclusively for draining the oil in the internal space S, and the supply hole 36 mainly performs the oil inflow function rather than the oil discharge function.
即ち油の吸入と排出を供給孔36と呼吸孔3
5とに分割しているので、呼吸のテンポが速く
なると共に、呼吸の効率が良くなり、内部空間
Sに潤滑油が多量に溜らず、掃気性が向上す
る。 In other words, oil is inhaled and discharged through the supply hole 36 and the breathing hole 3.
Since the space is divided into 5 parts, the breathing tempo becomes faster and breathing efficiency improves, and a large amount of lubricating oil does not accumulate in the internal space S, improving the scavenging performance.
(2) バルブブリツジ15の内部空間Sと弁腕室8
内とを連通する概ね水平な呼吸孔35をバルブ
ブリツジ壁部分に形成し、上記呼吸孔35を、
噴射バルブ41が位置する弁腕室中央部側に向
けて開口し、弁腕室中央部の噴射バルブ41側
とは反対側の潤滑油供給孔36を、バルブブリ
ツジの上端面において上向きに開口するL字型
に形成しているので、バルブブリツジ内部空間
Sから排出される潤滑油は、殆んど呼吸孔35
を通つて弁腕室中央部側へのみ排出される。(2) Internal space S of valve bridge 15 and valve arm chamber 8
A generally horizontal breathing hole 35 communicating with the inside is formed in the valve bridge wall portion, and the breathing hole 35 is
An L is opened toward the center of the valve arm chamber where the injection valve 41 is located, and the lubricating oil supply hole 36 on the side opposite to the injection valve 41 in the center of the valve arm chamber is opened upward at the upper end surface of the valve bridge. Since the valve bridge is formed in a shape of
It is discharged only to the central part of the valve arm chamber through the valve arm chamber.
従つて呼吸孔35から噴出する潤滑油が弁腕
ケース2の側壁に直接吹付けられることはな
く、弁腕室8からの油漏れを確実に防止できる
と共に、弁腕ケース2の内周壁が汚れることも
ない。 Therefore, the lubricating oil spouted from the breathing hole 35 is not sprayed directly onto the side wall of the valve arm case 2, and oil leakage from the valve arm chamber 8 can be reliably prevented, and the inner circumferential wall of the valve arm case 2 will become dirty. Not at all.
(3) 潤滑油供給孔36は略L字形に形成されてい
るので、バルブブリツジ15の中心線に対して
斜めに孔明加工する必要がなく、加工作業が容
易になる。(3) Since the lubricating oil supply hole 36 is formed in a substantially L-shape, there is no need to drill the hole diagonally with respect to the center line of the valve bridge 15, making the machining operation easier.
(4) 水平な呼吸孔35とL字型潤滑油供給孔36
の下端水平部分を概ね同一直線上に配置してい
るので、上記両孔部分を同時にきり孔加工で
き、加工が容易になる。(4) Horizontal breathing hole 35 and L-shaped lubricating oil supply hole 36
Since the lower horizontal portions of the holes are arranged approximately on the same straight line, both holes can be drilled at the same time, making the processing easier.
(5) 吸気側のバルブブリツジ15と排気側のバル
ブブリツジ15′は、180度の位相差を有するだ
けであるため、同一構造のものを利用すること
ができ、部品製造の手間を大幅に省くことがで
きる。(5) Since the valve bridge 15 on the intake side and the valve bridge 15' on the exhaust side only have a phase difference of 180 degrees, they can be of the same structure, and the labor of manufacturing parts can be greatly reduced. can.
第1図は本考案を適用した内燃機関の弁腕ケー
ス部分の縦断面図(第2図の−断面図)、第
2図はケースカバーを取り外した状態で示す第1
図の矢視上面図、第3図は第1図の−断面
部分拡大図である。
8……弁腕室、10……吸気弁腕、15,1
5′……バルブブリツジ、21……固定軸、22
……吸気弁、35,35′……呼吸孔、36……
潤滑油供給孔、S……内部空間。
Figure 1 is a vertical cross-sectional view (-cross-sectional view in Figure 2) of the valve arm case portion of an internal combustion engine to which the present invention is applied, and Figure 2 is the first valve arm case shown with the case cover removed.
FIG. 3 is a top view in the direction of arrows in the figure, and FIG. 3 is a partial enlarged view of the - cross section of FIG. 8...Valve arm chamber, 10...Intake valve arm, 15,1
5'... Valve bridge, 21... Fixed shaft, 22
...Intake valve, 35, 35'...Breathing hole, 36...
Lubricating oil supply hole, S...Internal space.
Claims (1)
腕室中央部の燃料噴射バルブ41から間隔を隔て
て垂直な固定軸21を設け、該固定軸21の外周
側に上下動自在に嵌合し弁腕10,40の動作を
吸気弁22又は排気弁に伝えるバルブブリツジに
おいて、バルブブリツジ内に、固定軸21によつ
て下側が閉塞されると共にバルブブリツジの上下
運動によつて容積が変化する内部空間Sを形成
し、内部空間Sと弁腕室8内とを連通する概ね水
平な呼吸孔35をバルブブリツジ壁部分に形成
し、上記呼吸孔35を、噴射バルブ41が位置す
る弁腕室中央部側に向けて開口し、上記呼吸孔3
5とは反対側の弁腕ケース側壁に近いバルブブリ
ツジ壁部分に、バルブブリツジ上端面からバルブ
ブリツジ内部空間Sに至る略L字型の潤滑油供給
孔36を形成してバルブブリツジ上端面に溜る潤
滑油を内部空間Sに導くようにし、供給孔36の
下端水平部分を呼吸孔35と概ね同一直線上に形
成したことを特徴とするバルブブリツジの呼吸孔
構造。 A vertical fixed shaft 21 is provided in the valve arm chamber 8 covered by the valve arm case 2 at a distance from the fuel injection valve 41 in the center of the valve arm chamber, and is movable up and down on the outer circumferential side of the fixed shaft 21. In the valve bridge that transmits the operation of the fitted valve arms 10, 40 to the intake valve 22 or the exhaust valve, there is an interior in the valve bridge whose lower side is closed off by the fixed shaft 21 and whose volume changes as the valve bridge moves up and down. A generally horizontal breathing hole 35 that forms a space S and communicates between the internal space S and the inside of the valve arm chamber 8 is formed in the valve bridge wall portion, and the breathing hole 35 is connected to the central part of the valve arm chamber where the injection valve 41 is located. Opening toward the side, the above-mentioned breathing hole 3
A substantially L-shaped lubricating oil supply hole 36 extending from the upper end surface of the valve bridge to the internal space S of the valve bridge is formed in the valve bridge wall portion near the side wall of the valve arm case on the opposite side from 5, so that the lubricating oil accumulated on the upper end surface of the valve bridge is drained internally. A breathing hole structure of a valve bridge characterized in that the lower horizontal portion of the supply hole 36 is formed on the same straight line as the breathing hole 35 so as to lead to the space S.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15583681U JPS5859913U (en) | 1981-10-19 | 1981-10-19 | Breathing hole structure of valve bridge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15583681U JPS5859913U (en) | 1981-10-19 | 1981-10-19 | Breathing hole structure of valve bridge |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5859913U JPS5859913U (en) | 1983-04-22 |
JPS622254Y2 true JPS622254Y2 (en) | 1987-01-20 |
Family
ID=29948401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15583681U Granted JPS5859913U (en) | 1981-10-19 | 1981-10-19 | Breathing hole structure of valve bridge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5859913U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4540116B2 (en) * | 2006-02-13 | 2010-09-08 | Udトラックス株式会社 | Valve mechanism |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4947781A (en) * | 1972-09-13 | 1974-05-09 |
-
1981
- 1981-10-19 JP JP15583681U patent/JPS5859913U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4947781A (en) * | 1972-09-13 | 1974-05-09 |
Also Published As
Publication number | Publication date |
---|---|
JPS5859913U (en) | 1983-04-22 |
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