JPH022881Y2 - - Google Patents
Info
- Publication number
- JPH022881Y2 JPH022881Y2 JP4720283U JP4720283U JPH022881Y2 JP H022881 Y2 JPH022881 Y2 JP H022881Y2 JP 4720283 U JP4720283 U JP 4720283U JP 4720283 U JP4720283 U JP 4720283U JP H022881 Y2 JPH022881 Y2 JP H022881Y2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- cylinder body
- oil
- fitted
- high pressure
- 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
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
本考案はオーバーヘツドバルブ内燃機関に用い
られる油圧式弁間隙調整装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic valve gap adjustment device used in an overhead valve internal combustion engine.
従来の油圧式弁間隙調整装置は、ロツカーシヤ
フトに取付けられたロツカーアームに嵌入装着さ
れた下方開放のシリンダボデイと、このボデイ内
に摺動自在に嵌入させた上方開放の円筒形プラン
ジヤと、このプランジヤ内に嵌入させ、シリンダ
ボデイの頂壁とともにリザーバ室を構成する円筒
形インナプランジヤと、インナプランジヤの底壁
に形成されたオリフイスと協働し、インナプラン
ジヤの底壁とプランジヤとの間に構成された高圧
室内にあるチエツク弁とからなつている。 A conventional hydraulic valve gap adjustment device includes a cylinder body that opens downwardly and is fitted into a rocker arm attached to a rocker shaft, a cylindrical plunger that opens upwardly and is slidably fitted into this body, and a cylinder body that opens upwardly and is slidably fitted into this body. A cylindrical inner plunger that is fitted into the cylinder body and forms a reservoir chamber together with the top wall of the cylinder body, and an orifice formed in the bottom wall of the inner plunger that is configured between the bottom wall of the inner plunger and the plunger. It consists of a check valve located inside the high pressure chamber.
このような従来の油圧式弁間隙調整装置にあつ
ては、ボデイ上部が頂壁で閉塞されているため油
中に混入している空気がリザーバ室上部及び油を
ロツカーアーム内部の油通路からリザーバ室に導
びくボデイ内の油通路付近にたまりやすく排出さ
れにくい。このため気泡がチエツク弁を通つて高
圧室に入り込みやすく、正常な弁間隙調整機能が
阻害されやすいという問題点があつた。 In such a conventional hydraulic valve gap adjustment device, since the upper part of the body is closed by the top wall, air mixed in the oil flows from the upper part of the reservoir chamber and the oil from the oil passage inside the rocker arm to the reservoir chamber. It tends to accumulate near the oil passage in the body that leads to the oil and is difficult to drain. For this reason, there was a problem in that air bubbles easily entered the high pressure chamber through the check valve, and the normal valve gap adjustment function was likely to be inhibited.
本考案はこのような従来の問題点に着目してな
されたもので、シリンダボデイに、その油供給孔
よりも頂壁に近く、ロツカーシヤフトに近い部分
において油通路よりシリンダボデイとロツカーア
ームとの嵌合部に連通する油排出孔を設けたこと
を特徴とし、これにより供給油中の空気および高
圧室からリークした油中の空気を速やかに外部に
排出し、高圧室への空気の吸込みを低減しうる効
果を有するものである。 The present invention was developed by focusing on these conventional problems.The cylinder body is closer to the top wall of the cylinder body than the oil supply hole and is closer to the rocker shaft than the oil passage. It is characterized by an oil discharge hole that communicates with the high pressure chamber, thereby quickly discharging the air in the supplied oil and the air in the oil leaking from the high pressure chamber to the outside, thereby reducing the intake of air into the high pressure chamber. It has a moisturizing effect.
以下、本考案を添付図面を参照して説明する
と、ロツカーアーム７に嵌入装着された下端開放
のシリンダボデイ１には上端開放の円筒形プラン
ジヤ２が摺動自在に嵌入され、プランジヤ内には
上端開放の円筒形インナプランジヤ３が摺動自在
に嵌入されている。インナプランジヤはその閉塞
底壁にオリフイス３′を備え、この底壁の下には
オリフイスと協働するチエツクバルブ４が取付け
られている。インナプランジヤ３はシリンダボデ
イ１の頂壁とともにリザーバ室５を形成し、イン
ナプランジヤ３の底壁とプランジヤ２との間には
高圧室６が形成されている。 The present invention will be described below with reference to the accompanying drawings. A cylindrical plunger 2 with an open top end is slidably fitted into a cylinder body 1 with an open bottom end fitted into a rocker arm 7, and a cylindrical plunger 2 with an open top end is fitted inside the plunger. A cylindrical inner plunger 3 is slidably fitted therein. The inner plunger is provided with an orifice 3' in its closed bottom wall, below which a check valve 4 cooperating with the orifice is mounted. The inner plunger 3 forms a reservoir chamber 5 together with the top wall of the cylinder body 1, and a high pressure chamber 6 is formed between the bottom wall of the inner plunger 3 and the plunger 2.
油はロツカーアーム７の内部の通路８からシリ
ンダボデイ１の油供給孔１１およびシリンダボデ
イ１内の油通路９を通つてリザーバ室５に補給さ
れる。 Oil is supplied to the reservoir chamber 5 from a passage 8 inside the rocker arm 7 through an oil supply hole 11 in the cylinder body 1 and an oil passage 9 in the cylinder body 1.
シリンダボデイ１には、シリンダボデイの油供
給孔１１よりもその頂壁に近く、ロツカーシヤフ
トに近い部分において、油通路９よりシリンダボ
デイ１とロツカーアーム７との嵌合部に連通する
油排出孔１２が設けてある。油排出孔１２は嵌合
部の部分１３を介して外部に連通する。 The cylinder body 1 has an oil discharge hole 12 that communicates with the fitting part between the cylinder body 1 and the rocker arm 7 through the oil passage 9 at a portion closer to the top wall of the cylinder body than the oil supply hole 11 of the cylinder body and closer to the rocker shaft. It is provided. The oil drain hole 12 communicates with the outside via the fitting portion 13.
今リザーバ室５および高圧室６が油で満されて
いるものと仮定すると、カムの回転に従つてエン
ジンバルブが開くとロツカーアーム７を通して本
装置に力が加わり、この時チエツク弁４は閉じて
いるので高圧室６に高圧が発生する。この時プラ
ンジヤ２とインナプランジヤ３との間のわずかな
隙間を通つて油がわずかに漏れそのためプランジ
ヤ２もその分変位する。 Assuming that the reservoir chamber 5 and high pressure chamber 6 are filled with oil, when the engine valve opens as the cam rotates, force is applied to this device through the rocker arm 7, and at this time the check valve 4 is closed. Therefore, high pressure is generated in the high pressure chamber 6. At this time, a small amount of oil leaks through a small gap between the plunger 2 and the inner plunger 3, so that the plunger 2 is also displaced by that amount.
バルブが閉じるとプランジヤ２は復帰バネによ
つて押しもどされ高圧室６の圧力がリザーバ室５
の圧力よりも低くなり、チエツク弁４が開いてリ
ザーバ室５より高圧室６へ油が流れ込む。リザー
バ室５へは油回路より常に油が供給されるが油は
空気を微少な粒や溶解した状態で含んでいるため
リザーバ室５内にはそれらの空気が蓄積する。チ
エツク弁４が開いて高圧室６が油を吸込む行程で
空気を一緒に吸い込んでしまうため高圧室が圧縮
性となり、正常な弁間隙調整機能をしなくなる。 When the valve closes, the plunger 2 is pushed back by the return spring and the pressure in the high pressure chamber 6 is transferred to the reservoir chamber 5.
, the check valve 4 opens and oil flows from the reservoir chamber 5 into the high pressure chamber 6. Oil is constantly supplied to the reservoir chamber 5 from the oil circuit, but since oil contains air in the form of minute particles or in a dissolved state, the air accumulates in the reservoir chamber 5. When the check valve 4 opens and the high pressure chamber 6 sucks in oil, the high pressure chamber 6 also sucks in air, which makes the high pressure chamber compressible and does not perform the normal valve gap adjustment function.
本考案によれば、シリンダボデイにその頂壁に
隣接して油排出孔１２を設け、この孔が空気のた
まりやすい場所の近傍に位置しているため、シリ
ンダボデイとロツカーアームとの嵌合部の部分１
３を通して外部への空気の排出を速やかにし、高
圧室６への空気の吸い込みを低減する。 According to the present invention, the oil discharge hole 12 is provided in the cylinder body adjacent to its top wall, and this hole is located near a place where air tends to accumulate, so that the fitting part between the cylinder body and the rocker arm is prevented. part 1
3, the air is quickly discharged to the outside, and the intake of air into the high pressure chamber 6 is reduced.
添附図面は本考案による油圧式弁間隙調整装置
の縦断面図である。
１……シリンダボデイ、２……プランジヤ、３
……インナプランジヤ、４……チエツク弁、５…
…リザーバ室、６……高圧室、７……ロツカーア
ーム、９……油通路、１１……油供給孔、１２…
…油排出孔。
The accompanying drawing is a longitudinal sectional view of a hydraulic valve gap adjustment device according to the present invention. 1...Cylinder body, 2...Plunger, 3
...Inner plunger, 4...Check valve, 5...
...Reservoir chamber, 6...High pressure chamber, 7...Rotzker arm, 9...Oil passage, 11...Oil supply hole, 12...
...Oil drain hole.
Claims (1)
ムに嵌入装着された下方開放のシリンダボデイ
と、このボデイ内に摺動自在に嵌入させた上方開
放の円筒形プランジヤと、このプランジヤ内に嵌
入させ、シリンダボデイの頂壁とともにリザーバ
室を構成する円筒形インナプランジヤと、インナ
プランジヤの底壁とプランジヤとの間の高圧室内
にあつて、インナプランジヤの底壁に形成された
オリフイスと協働するチエツク弁とからなる油圧
式弁間隙調整装置において、シリンダボデイに、
その油供給孔よりも頂壁に近く、ロツカーシヤフ
トに近い部分において、油通路よりシリンダボデ
イとロツカーアームとの嵌合部に連通する油排出
孔を設けたことを特徴とする弁間隙調整装置。 A cylinder body that opens downwardly and is fitted into a Rockscar arm attached to a Rockscar shaft, a cylindrical plunger that opens upwards and is slidably fitted into this body, and a cylindrical plunger that is fitted into this plunger and is fitted together with the top wall of the cylinder body. A hydraulic valve consisting of a cylindrical inner plunger constituting a reservoir chamber, and a check valve located in a high pressure chamber between the bottom wall of the inner plunger and the plunger and cooperating with an orifice formed in the bottom wall of the inner plunger. In the gap adjustment device, on the cylinder body,
A valve gap adjustment device characterized in that an oil discharge hole is provided in a portion closer to the top wall than the oil supply hole and closer to the rocker shaft and communicates with the fitting portion of the cylinder body and rocker arm from the oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4720283U JPS59152107U (en) | 1983-03-31 | 1983-03-31 | Hydraulic valve gap adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4720283U JPS59152107U (en) | 1983-03-31 | 1983-03-31 | Hydraulic valve gap adjustment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59152107U JPS59152107U (en) | 1984-10-12 |
| JPH022881Y2 true JPH022881Y2 (en) | 1990-01-24 |
Family
ID=30177752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4720283U Granted JPS59152107U (en) | 1983-03-31 | 1983-03-31 | Hydraulic valve gap adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59152107U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0622086Y2 (en) * | 1986-11-18 | 1994-06-08 | 株式会社ユニシアジェックス | Adjustable valve lock arm |
| JPH0622087Y2 (en) * | 1986-11-19 | 1994-06-08 | 株式会社ユニシアジェックス | Adjustable valve lock arm |
-
1983
- 1983-03-31 JP JP4720283U patent/JPS59152107U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59152107U (en) | 1984-10-12 |
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