JPH0373727B2 - - Google Patents
Info
- Publication number
- JPH0373727B2 JPH0373727B2 JP59021919A JP2191984A JPH0373727B2 JP H0373727 B2 JPH0373727 B2 JP H0373727B2 JP 59021919 A JP59021919 A JP 59021919A JP 2191984 A JP2191984 A JP 2191984A JP H0373727 B2 JPH0373727 B2 JP H0373727B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- valve
- air spring
- skirt
- chamber
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
- F01L1/462—Valve return spring arrangements
- F01L1/465—Pneumatic arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Description
【発明の詳細な説明】 本発明は油圧駆動動弁装置に関する。[Detailed description of the invention] The present invention relates to a hydraulically driven valve train.
第１図は従来の油圧駆動動弁装置の構造を示
し、１はカム、２はローラ、３はカム１とローラ
２によつて上下運動をするピストン、４はポンプ
室、５は給油管、６は給油管５からポンプ室４に
作動油を給油する給油孔、７はポンプ室が低圧に
なつた場合空洞が出来ないように給油管５から作
動油を補給するための逆止弁、８は高圧管、９は
弁側ピストン室、１０は弁側ピストン、１１は弁
棒、１２は排気弁、１３は弁座、１４はデイーゼ
ルエンジンのシリンダ室、１５は空気ばね室、１
６は空気ばね用ピストン、１７は空気源、１８は
空気源１７から空気ばね室１５に空気を補給する
逆止弁である。 Fig. 1 shows the structure of a conventional hydraulically driven valve train, in which 1 is a cam, 2 is a roller, 3 is a piston that moves up and down by the cam 1 and roller 2, 4 is a pump chamber, 5 is an oil supply pipe, 6 is an oil supply hole for supplying hydraulic oil from the oil supply pipe 5 to the pump chamber 4; 7 is a check valve for supplying hydraulic oil from the oil supply pipe 5 to prevent a cavity from forming when the pump chamber becomes low pressure; 8 1 is a high pressure pipe, 9 is a valve side piston chamber, 10 is a valve side piston, 11 is a valve stem, 12 is an exhaust valve, 13 is a valve seat, 14 is a diesel engine cylinder chamber, 15 is an air spring chamber, 1
6 is an air spring piston, 17 is an air source, and 18 is a check valve that replenishes air from the air source 17 to the air spring chamber 15.
次に前記実施例の作用について説明する。 Next, the operation of the above embodiment will be explained.
カム１とローラ２の回転によつてピストン３が
上方に押し上げられると、ピストン３が給油孔６
を塞ぎポンプ室４の圧力は上昇し高圧になる。高
圧になつた作動油は高圧管８を通つてピストン室
９に達する。ピストン室が高圧になるとピストン
１０によつて弁棒１１は押し下げられて排気弁１
２が開きシリンダ室１４の排気ガスは排気弁１２
と弁座１３の間を通つて大気中に放出される。 When the piston 3 is pushed upward by the rotation of the cam 1 and the roller 2, the piston 3 enters the oil supply hole 6.
The pressure in the pump chamber 4 increases and becomes high pressure. The high-pressure hydraulic oil passes through the high-pressure pipe 8 and reaches the piston chamber 9. When the pressure in the piston chamber becomes high, the valve stem 11 is pushed down by the piston 10 and the exhaust valve 1
2 is opened and the exhaust gas in the cylinder chamber 14 is released from the exhaust valve 12.
and the valve seat 13 and is released into the atmosphere.
次ぎにピストン３が下降し始めるとポンプ室４
の圧力が下がり、ピストン室９の圧力が下がり始
め、弁棒１１が押し下げられるときにピストン１
６によつて圧縮されていた空気ばね室１５の圧力
が弁棒１１を押し上げる方向に働くので弁棒１１
は上方に動き排気弁１２が閉じて排気ガスの放出
は完了する。 Next, when the piston 3 begins to descend, the pump chamber 4
, the pressure in the piston chamber 9 begins to decrease, and when the valve stem 11 is pushed down, the piston 1
The pressure in the air spring chamber 15 compressed by the valve 6 acts in a direction to push up the valve stem 11.
moves upward, the exhaust valve 12 closes, and the discharge of exhaust gas is completed.
しかし上記の油圧駆動動弁装置には次のような
欠点がある。即ちシリンダ１４の壁面の変動温度
は場所によつてかなりの差がある。特に火災に直
接さらされる部分は高温になる。排気弁は高温に
さらされるため冷却が困難であり長時間過熱状態
にあるとその部分が焼損をおこし寿命が短くなる
おそれがある。 However, the above hydraulically driven valve train has the following drawbacks. That is, the fluctuating temperature of the wall surface of the cylinder 14 varies considerably depending on the location. Parts that are directly exposed to fire become particularly hot. Since the exhaust valve is exposed to high temperatures, it is difficult to cool it, and if it remains overheated for a long time, there is a risk that that part will burn out and its life will be shortened.
本発明の目的は、前記従来装置の問題点を解消
し、排気弁の焼損事故を防止し、寿命の延長をは
かつた油圧駆動動弁装置を提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulically driven valve train which eliminates the problems of the conventional device, prevents burnout accidents of exhaust valves, and extends the life of the valve.
以下第２〜３図を参照して本発明の油圧駆動動
弁装置の一実施例について説明する。 An embodiment of the hydraulically driven valve train of the present invention will be described below with reference to FIGS. 2 and 3.
ここにおいて、前記従来装置と同一もしくは均
等構成部分には、同一符号を用いて説明する。 Here, the same or equivalent components as those of the conventional device will be described using the same reference numerals.
第２図は本発明に係る実施例の構成説明図であ
り第３図は第２図において弁棒１１の破線Ａ−Ａ
部分が破線Ｂ−Ｂのところまで下がつた場合のＢ
−Ｂ断面図である。 FIG. 2 is an explanatory diagram of the configuration of an embodiment according to the present invention, and FIG. 3 is a diagram showing the broken line AA of the valve stem 11 in FIG.
B when the part goes down to the broken line B-B
-B sectional view.
第２図で１００はスカートを持つた空気ばね用
ピストンで同スカートの中間外周面には横断面で
鋸歯状になつた羽根１０２をそなえている。１０
１はスカート上部に設けられ空気ばね室１５と羽
根１０２に連通した通路、１０２は弁棒１１に固
着されノズル１０３から空気ばね室１５で圧縮さ
れた空気が通路１０１を通じて供給され、弁棒１
１が下がつて羽根１０２と一致したとき大気に噴
出するようにした一定角度の傾斜で開口されたノ
ズルである。他は従来例の構造と同じであるから
省略する。 In FIG. 2, reference numeral 100 denotes a piston for an air spring having a skirt, and the intermediate outer peripheral surface of the skirt is provided with blades 102 having a sawtooth shape in cross section. 10
1 is a passage provided in the upper part of the skirt and communicates with the air spring chamber 15 and the blade 102; 102 is fixed to the valve stem 11, and air compressed in the air spring chamber 15 is supplied from a nozzle 103 through the passage 101;
1 is a nozzle that opens at a certain angle so that when it descends and meets the blade 102, the air is ejected into the atmosphere. The rest is the same as the structure of the conventional example, and will therefore be omitted.
次に前記実施例の作用について第２〜３図で説
明する。 Next, the operation of the above embodiment will be explained with reference to FIGS. 2 and 3.
カム１によつてピストン３が押し上げられる
と、ピストン３が供給孔６を塞ぎポンプ室４の圧
力は上昇し高圧になる。高圧になつた作動油は高
圧管８を介してピストン室９に達する弁側ピスト
ン室９が高圧になると弁棒１１は押し下げられ
る。弁棒１１が下がると空気ばね室１５の空気は
圧縮され、羽根１０２はノズル１０３の位置まで
下がる。羽根１０２の位置がノズル１０３の位置
まで下がると空気ばね室１５の圧縮空気は通路１
０１を通つて、さらに羽根１０２を通つて、ノズ
ル１０３から大気に噴出される。空気がノズル１
０３から噴出されるとその反動力で羽根１０２は
回転力を生じ、羽根１０２に固着された弁棒１１
は回転する。 When the piston 3 is pushed up by the cam 1, the piston 3 closes the supply hole 6 and the pressure in the pump chamber 4 increases to become high pressure. The high-pressure hydraulic oil reaches the piston chamber 9 via the high-pressure pipe 8. When the pressure in the valve-side piston chamber 9 becomes high, the valve rod 11 is pushed down. When the valve stem 11 is lowered, the air in the air spring chamber 15 is compressed, and the vanes 102 are lowered to the position of the nozzle 103. When the position of the blade 102 is lowered to the position of the nozzle 103, the compressed air in the air spring chamber 15 flows into the passage 1.
01, further passes through the blade 102, and is ejected from the nozzle 103 into the atmosphere. Air is nozzle 1
03, the blade 102 generates rotational force due to the reaction force, and the valve stem 11 fixed to the blade 102
rotates.
前述のとおり、本発明の油圧駆動動弁装置は、
弁棒の中間部に空気ばねピストンをそなえたもの
においては、上記空気ばね室をスカートをもつた
空気ばねピストンとシリンダとで形成し、上記ス
カートの中間外周面に横断面が鋸歯状に形成され
た羽根を設け、同羽根とピストンスカート内部と
を通じる通路を設けるとともに、上記シリンダに
は一定傾斜角で外部と連通する複数のノズルを設
けたので、この弁は時間とともに少しづつ回転
し、排気弁などの場合高温の場所や火炎が直接に
当る場所が弁座の同じ部分に長く止まることがな
いので、弁座部分が焼損を起すことがなく、弁の
寿命が延長される利点がある。 As mentioned above, the hydraulically driven valve train of the present invention includes:
In the case where the air spring piston is provided in the middle part of the valve stem, the air spring chamber is formed by an air spring piston having a skirt and a cylinder, and the cross section of the skirt is formed in a sawtooth shape on the middle outer peripheral surface. In addition to providing a passage between the vane and the inside of the piston skirt, the cylinder was also equipped with a plurality of nozzles that communicated with the outside at a constant angle of inclination, so that this valve rotated little by little over time, allowing the exhaust gas to flow through the cylinder. In the case of valves, the valve seat does not remain in the same part of the valve seat for a long time in a hot place or in a place where it is directly exposed to flame, so the valve seat part does not burn out, which has the advantage of extending the life of the valve.
第１図は、従来の油圧駆動動弁装置の構造図、
第２図は本発明に係る実施例の構造説明図、第３
図は第２図において弁棒１１の破線Ａ−Ａ部分が
破線Ｂ−Ｂのところに下がつた場合のＢ−Ｂ断面
図である。
１０……ピストン、１１……弁棒、１５……空
気ばね室、１００……空気ばねピストン、１０１
……通路、１０２……羽根、１０３……ノズル。
Figure 1 is a structural diagram of a conventional hydraulically driven valve train;
Fig. 2 is a structural explanatory diagram of an embodiment according to the present invention;
The figure is a sectional view taken along the line BB in FIG. 2 when the broken line AA portion of the valve stem 11 drops to the broken line BB. 10...Piston, 11...Valve stem, 15...Air spring chamber, 100...Air spring piston, 101
...Passway, 102...Blade, 103...Nozzle.
Claims (1)
ンの中間部に空気ばねピストンを具えたデイーゼ
ルエンジンの油圧駆動動弁装置において、上記空
気ばね室をスカートを持つた空気ばねピストンと
シリンダとで形成し、上記スカートの中間外周面
に横断面が鋸歯状に形成された羽根を設け、同羽
根とピストンスカート内部とを通じる通路を設け
ると共に上記シリンダには一定傾斜角で外部と連
通する複数のノズルを設けたことを特徴とする油
圧駆動動弁装置。1. In a hydraulically driven valve gear for a diesel engine, which has a piston at one end of the valve stem and an air spring piston in the middle of the piston, the air spring chamber is formed by an air spring piston having a skirt and a cylinder. A blade having a serrated cross section is provided on the intermediate outer peripheral surface of the skirt, a passage is provided between the blade and the inside of the piston skirt, and a plurality of nozzles are provided in the cylinder communicating with the outside at a constant angle of inclination. A hydraulically driven valve train characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021919A JPS60166711A (en) | 1984-02-10 | 1984-02-10 | Valve operating device of hydraulic drive type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021919A JPS60166711A (en) | 1984-02-10 | 1984-02-10 | Valve operating device of hydraulic drive type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60166711A JPS60166711A (en) | 1985-08-30 |
| JPH0373727B2 true JPH0373727B2 (en) | 1991-11-22 |
Family
ID=12068482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59021919A Granted JPS60166711A (en) | 1984-02-10 | 1984-02-10 | Valve operating device of hydraulic drive type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60166711A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827882A (en) * | 1985-07-16 | 1989-05-09 | Paul Marius A | Internal regenerative combustion engines with thermal integrated optimized system |
| JPH0417766Y2 (en) * | 1985-12-12 | 1992-04-21 | ||
| CN104421008B (en) * | 2013-09-10 | 2018-08-14 | 谢庆生 | Port timing and valve stroke independence continuous variable adjuster |
| CN104420915A (en) * | 2013-09-10 | 2015-03-18 | 王自勤 | Continuous variable adjuster for gas distribution phase |
| CN104421006A (en) * | 2013-09-10 | 2015-03-18 | 田丰果 | Continuous variable adjuster for gas valve lift |
-
1984
- 1984-02-10 JP JP59021919A patent/JPS60166711A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60166711A (en) | 1985-08-30 |
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