JPH0417704A - Valve system for internal combustion engine - Google Patents
Valve system for internal combustion engineInfo
- Publication number
- JPH0417704A JPH0417704A JP2117630A JP11763090A JPH0417704A JP H0417704 A JPH0417704 A JP H0417704A JP 2117630 A JP2117630 A JP 2117630A JP 11763090 A JP11763090 A JP 11763090A JP H0417704 A JPH0417704 A JP H0417704A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- actuator
- valves
- solenoid valve
- closing
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title description 4
- 239000010720 hydraulic oil Substances 0.000 claims description 28
- 230000005284 excitation Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34446—Fluid accumulators for the feeding circuit
Landscapes
- Valve Device For Special Equipments (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はディーゼル機関の吸、排気弁を開閉制御する蓄
圧式動弁装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an accumulator type valve operating system for controlling the opening and closing of intake and exhaust valves of a diesel engine.
第３図は従来形の蓄圧式動弁装置を図示したもので、油
圧源０１０により加圧され蓄圧器０１１内に一定圧で蓄
圧された作動油と、この作動油を制御する電磁弁０１と
、その弁を駆動するコントローラ０２と、シリンダカバ
ー０５に設けられ吸排気弁０６を作動油で動かすアクチ
ュエータｏ７と配管０８，０９より構成されている。FIG. 3 shows a conventional pressure accumulation type valve operating system, in which hydraulic oil is pressurized by a hydraulic source 010 and stored at a constant pressure in a pressure accumulator 011, and a solenoid valve 01 that controls this hydraulic oil. , a controller 02 that drives the valves, an actuator o7 provided on the cylinder cover 05 that moves the intake and exhaust valves 06 using hydraulic oil, and pipes 08 and 09.
次に前記従来装置の作用について説明する。Next, the operation of the conventional device will be explained.
第３図は吸、排気弁０６が閉弁した状態を示しコントロ
ーラ０２の閉弁指令にもとすき電磁弁はＯＦＦになり、
蓄圧器０１１の作動油は配管ｏ９をへてアクチュエータ
０７の上部屋０７ａに導入されており、作動油の圧力に
よって吸、排気弁０６は上方へ移動し閉弁した状態とな
っている。Figure 3 shows the state in which the intake and exhaust valves 06 are closed, and the plow solenoid valve is turned OFF in response to a valve closing command from the controller 02.
The hydraulic oil in the pressure accumulator 011 is introduced into the upper chamber 07a of the actuator 07 through the pipe o9, and the suction and exhaust valves 06 are moved upward by the pressure of the hydraulic oil and are in a closed state.
このとき、アクチュエータ０７の上部屋０７ｂの作動油
は配管０８、電磁弁０１をへて油圧源０１０のタンク０
１０ａに排出される。At this time, the hydraulic oil in the upper chamber 07b of the actuator 07 passes through the pipe 08 and the solenoid valve 01 to the tank 0 of the hydraulic power source 010.
10a.
次にコントローラ０２の開弁指令にもとすき電磁弁０１
がＯＮとなると、上部屋０７ａの作動油は配管０９、電
磁弁０１をへてタンク０１０ａに排出されるとともに、
蓄圧器０１１の高圧作動油は電磁弁０１、配管０８をへ
て上部屋０７ｂに作動し、この油圧により上部屋０７ａ
内の作動油を配管０９をへてタンク０１０ａに戻すと同
時に、吸、排気弁０６を下方に動かして開弁させる。し
かし、上記のように給排気弁０６を開閉させるための電
磁弁０１への通電（Ｉ、）は第４図に示すように排気弁
０６のリフト（ＺＶ ）期間に見合う時間が必要となる
。Next, for the valve opening command of the controller 02, the solenoid valve 01
When turned on, the hydraulic oil in the upper chamber 07a passes through the pipe 09 and the solenoid valve 01 and is discharged to the tank 010a,
The high-pressure hydraulic oil in the pressure accumulator 011 passes through the solenoid valve 01 and piping 08 and operates into the upper chamber 07b, and this oil pressure causes the upper chamber 07a to flow into the upper chamber 07a.
The hydraulic oil inside is returned to the tank 010a through the pipe 09, and at the same time, the suction and exhaust valves 06 are moved downward to open them. However, as shown in FIG. 4, the energization (I,) to the electromagnetic valve 01 for opening and closing the supply/exhaust valve 06 as described above requires a time corresponding to the lift (ZV) period of the exhaust valve 06.
ところが従来例では、高圧管０８，０９が２本であり、
アクチュエータ０７も複雑となって必然的に大形となる
。又吸、排気弁０６の開弁及び閉弁には高圧の作動油を
使用しており、該作動油はアクチュエータ０７を駆動後
はタンク０１０ａへ排油して捨てられるため、作動油の
消費が多（なりエネルギ損失が増大するとともに、電磁
弁０１の通電時間が長くなりコイルの発熱が大きくなり
、コイルの寿命が短かいうえ電力消費も大きくなるとい
う問題点がある。However, in the conventional example, there are two high pressure pipes 08 and 09,
The actuator 07 is also complicated and inevitably large in size. In addition, high-pressure hydraulic oil is used to open and close the intake and exhaust valves 06, and after driving the actuator 07, the hydraulic oil is drained into the tank 010a and discarded, reducing consumption of hydraulic oil. There are problems in that the energy loss increases, the energization time of the solenoid valve 01 becomes longer, the heat generation of the coil increases, the life of the coil is shortened, and the power consumption increases.
本発明の目的は前記従来装置の課題を解消し、アクチュ
エータの構造を簡素化し、吸、排気弁の閉弁をばね力で
行なうことにより作動油の消費量を必要最小限にとどめ
、動力損失を大幅に低減させ、コイル寿命が大幅に延長
し、消費電力が少ない内燃機関の動弁装置を提供するに
ある。The purpose of the present invention is to solve the above-mentioned problems of the conventional device, simplify the structure of the actuator, and close the intake and exhaust valves using spring force, thereby minimizing the consumption of hydraulic oil and reducing power loss. It is an object of the present invention to provide a valve operating system for an internal combustion engine that significantly reduces power consumption, significantly extends coil life, and consumes less power.
［課題を解決するための手段］
本発明の内燃機関の動弁装置は、開弁には油圧を使用し
閉弁にはばねを使用するものにおいて、作動油を油圧源
を介して加圧して蓄える蓄圧器と、吸、排気弁の上端に
当接し吸、排気弁を開弁するアクチュエータと、該蓄圧
器と前記アクチュエータとの間の配管内に設けられた開
弁電磁弁と、常時、吸、排気弁を閉じる方向に付勢する
ばねと、閉弁時には前記アクチュエータ内の作動油をタ
ンクに戻す閉弁電磁弁と、前記開閉用電磁弁をそれぞれ
適正なタイミングで開、閉制御するコントローラとを有
してなることを特徴としている。[Means for Solving the Problems] The valve train for an internal combustion engine of the present invention uses hydraulic pressure to open the valve and uses a spring to close the valve, and the hydraulic oil is pressurized via a hydraulic source. A pressure accumulator that stores pressure, an actuator that contacts the upper ends of the suction and exhaust valves to open the suction and exhaust valves, and an opening solenoid valve that is installed in the piping between the pressure accumulator and the actuator. , a spring that biases the exhaust valve in a direction to close it, a valve-closing solenoid valve that returns hydraulic oil in the actuator to a tank when the valve is closed, and a controller that controls opening and closing of the opening and closing solenoid valves at appropriate timings. It is characterized by having the following.
吸、排気弁の開弁は高圧作動油で駆動されるアクチュエ
ータによる構造であり、閉弁は吸、排気弁のリフトに伴
ない蓄えられる弁ばねが作動するように構成されている
ので、作動油の消費が減少しその動力損失を節減できる
。The suction and exhaust valves are opened by actuators driven by high-pressure hydraulic oil, and the valves are closed by actuating the stored valve springs as the suction and exhaust valves lift. consumption is reduced and power loss can be saved.
電磁弁は吸、排気弁の開弁及び開弁専用の２個で構成さ
れ、前記吸、排気弁は開弁専用電磁弁の開期間だけ揚程
運動し、前記電磁弁が閉弁すると揚程運動を終る。The solenoid valve is composed of two valves, one for opening the intake and exhaust valves, and the other for opening the valve.The intake and exhaust valves move in lift during the opening period of the solenoid valve only for opening, and move in lift when the solenoid valve closes. end.
次に吸、排気弁の閉弁は閉弁専用電磁弁の開弁によりア
クチュエータシリンダ内の作動油を油タンクへ逃がすと
同時に吸、排気弁に装着された弁ばねの力で吸、排気弁
は閉鎖される。Next, the suction and exhaust valves are closed by opening the solenoid valve exclusively for closing, allowing the hydraulic oil in the actuator cylinder to escape to the oil tank.At the same time, the suction and exhaust valves are closed by the force of the valve spring attached to the suction and exhaust valves. Closed.
電磁弁のコイルは、電磁弁の開時のみ短時間励磁される
のみであるから、コイル温度の上昇は僅かであり、コイ
ル寿命の延長が図られコイルの消費電力も低減できる。Since the coil of the solenoid valve is only energized for a short time when the solenoid valve is open, the coil temperature increases only slightly, extending the life of the coil and reducing the power consumption of the coil.
以下第１〜２図を参照し本発明の一実施例について説明
する。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は第１実施例の構成図、第２図はその吸排気弁及
び電磁弁リフト説明図である。FIG. 1 is a configuration diagram of the first embodiment, and FIG. 2 is an explanatory diagram of the intake/exhaust valve and electromagnetic valve lift.
図において、１は作動油をアクチュエータ７へ送油し吸
、排気弁６を揚程させる開弁電磁弁、２はアクチュエー
タフの作動油をタンク１０ａに排出し吸、排気弁６を閉
弁させる閉弁電磁弁であり、これらの電磁弁１，２はコ
ントローラ３０指令により作動する。アクチュエータ７
はシリンダ２１ピストン２２、ふた２３、逆止弁３０よ
り構成され、シリンダ２１の上部には吸、排気弁６の閉
弁をゆるやかにするクツション室７ｂ、シリンダ下部に
はピストン２２の異常リフト時のみふた２３との衝突を
防止するように作動するクツション室７ａを有し、排油
穴７ｃは通常の吸、排気弁のリフト域より下方に設けら
れているので、クツション室７ａは通常は作動しない。In the figure, 1 is an opening solenoid valve that sends hydraulic oil to the actuator 7, sucks it in, and lifts the exhaust valve 6. 2 is a solenoid valve that discharges the hydraulic oil of the actuator tough to a tank 10a, sucks it, and closes the exhaust valve 6. The valves are solenoid valves, and these solenoid valves 1 and 2 are operated by a controller 30 command. Actuator 7
is composed of a cylinder 21, a piston 22, a lid 23, and a check valve 30. The upper part of the cylinder 21 has a cushion chamber 7b that gently closes the intake and exhaust valves 6, and the lower part of the cylinder has a cushion chamber 7b that is used only when the piston 22 lifts abnormally. It has a cushion chamber 7a that operates to prevent collision with the lid 23, and the oil drain hole 7c is provided below the lift area of the normal intake and exhaust valves, so the cushion chamber 7a does not normally operate. .
排気弁６はシリンダカバー５に固定された弁案内１５内
を摺動し空気式弁ばね４０により上方に付勢され、その
上端はアクチュエータフのビストン２２の下端と当接し
ている。空気式弁ばね４０はピストン４１を気密に案内
するシリンダ４２と、吸、排気弁６とピストン４１を固
定するこま４３及び押え４４から構成され、空気穴４２
ａをへて空気槽４５から加圧空気が供給され、弁６の上
端面はアクチュエータ７のピストン２２の下端面と当接
している。なお空気式弁ばね４０のかわりにコイルばね
を使用することもできる。The exhaust valve 6 slides within a valve guide 15 fixed to the cylinder cover 5, is urged upward by a pneumatic valve spring 40, and its upper end abuts the lower end of the piston 22 of the actuator tough. The pneumatic valve spring 40 is composed of a cylinder 42 that airtightly guides the piston 41, a top 43 and a presser foot 44 that fix the intake and exhaust valves 6 and the piston 41, and an air hole 42.
Pressurized air is supplied from an air tank 45 through a, and the upper end surface of the valve 6 is in contact with the lower end surface of the piston 22 of the actuator 7. Note that a coil spring may be used instead of the pneumatic valve spring 40.
油圧源１０はタンク１０ａ、こし器、高圧ポンプ等から
構成され、高圧作動油を蓄圧器１１に送出し、蓄圧器１
１は高圧作動油を蓄える。The hydraulic power source 10 is composed of a tank 10a, a strainer, a high-pressure pump, etc., and sends high-pressure hydraulic oil to the pressure accumulator 11.
1 stores high pressure hydraulic oil.
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.
開弁ｔ［弁１がコントローラを介して励磁されると、蓄
圧器１１の高圧作動油が電磁弁１、入口穴２０、逆止弁
３０を介してアクチュエータ７へ油送され、ピストン２
２を下方へ揚程する。吸排気弁６のリフトが設定値まで
揚程した時点で電磁弁１の励磁は中止され、高圧油の供
給は終了するため、空気ばねの付勢力とアクチュエータ
フの作動油圧力が平衡する位置で吸、排気弁６の揚程が
維持される。万−弁揚程が設定値より異常に大きくなっ
た時には、ピストン２２の下面により排油孔７Ｃが塞が
れ、クツション室７ａの油圧が上昇し、ピストン２２と
ふた２３の機械的衝突が防止される。Valve opening t [When the valve 1 is excited via the controller, high-pressure hydraulic oil in the pressure accumulator 11 is sent to the actuator 7 via the solenoid valve 1, the inlet hole 20, and the check valve 30, and the piston 2
2 is lifted downward. When the lift of the intake/exhaust valve 6 reaches the set value, the excitation of the solenoid valve 1 is stopped and the supply of high-pressure oil is terminated. , the lift height of the exhaust valve 6 is maintained. When the valve lift becomes abnormally larger than the set value, the oil drain hole 7C is blocked by the lower surface of the piston 22, the oil pressure in the cushion chamber 7a increases, and mechanical collision between the piston 22 and the lid 23 is prevented. Ru.
次に閉弁電磁弁２が励磁されると、アクチュエータ７内
の作動油は入口穴２０、閉弁電磁弁２をへてタンク１０
ａへ排出され、ピストン２２は空気ばね４０により押し
戻され、吸、排気弁は閉弁する。閉弁の直前にはクツシ
ョン室７ｂが作動し吸、排気弁の閉弁着座をゆるやかに
行わせる。Next, when the closing solenoid valve 2 is energized, the hydraulic oil in the actuator 7 passes through the inlet hole 20 and the closing solenoid valve 2 to the tank 10.
a, the piston 22 is pushed back by the air spring 40, and the intake and exhaust valves are closed. Immediately before the valve closes, the cushion chamber 7b operates to gently close and seat the intake and exhaust valves.
［発明の効果］
本発明に係る内燃機関の動弁装置は前記のとおり構成し
たので、アクチュエータの構造が単純化されるとともに
、油圧クツション作用により着座を最適に制御し、揚程
異常時の機械的衝突を防止できる。[Effects of the Invention] Since the valve train for an internal combustion engine according to the present invention is configured as described above, the structure of the actuator is simplified, seating is optimally controlled by hydraulic cushioning, and mechanical Collisions can be prevented.
又吸、排気弁の戻りは開弁時に蓄えられたばね力により
行われ、高圧作動油は開弁のみに使用され、作動油の消
費量を最小にとどめ、作動油の駆動エネルギを減少させ
、動力損失の大幅な低減が可能となる。さらに電磁弁の
励磁時間が大幅に短縮されるため、コイルの温度上昇が
少なく、コイルの大幅な寿命の延長が図られ、コイル励
磁の電力消費も節減できる。In addition, the return of the suction and exhaust valves is performed by the spring force stored when the valves are opened, and high-pressure hydraulic oil is used only for opening the valves, minimizing the consumption of hydraulic oil and reducing the drive energy of the hydraulic oil. This makes it possible to significantly reduce losses. Furthermore, since the excitation time of the solenoid valve is significantly shortened, the temperature rise in the coil is small, the life of the coil is significantly extended, and power consumption for coil excitation can be reduced.
第１〜２図は本発明に係わるもので、第１図は第１実施
例の構成図、第２図は吸、排気弁及び電磁弁リフト図、
第３〜４図は従来例で第３図は第１図応当図、第４図は
第２図応当図である。
１・・・開弁を磁弁、２・・・閉弁電磁弁、３・・・コ
ントローラ、７・・・アクチュエータ、７ａ・・・上部
クツション室、７ｂ・・・下部クツション室、１１・・
−蓄圧器、４０・・・空気式ばね。
第３図Figures 1 and 2 are related to the present invention; Figure 1 is a configuration diagram of the first embodiment, Figure 2 is a lift diagram of intake and exhaust valves and solenoid valves;
3 and 4 are conventional examples, FIG. 3 is a diagram corresponding to FIG. 1, and FIG. 4 is a diagram corresponding to FIG. 2. DESCRIPTION OF SYMBOLS 1... Solenoid valve for opening valve, 2... Solenoid valve for closing valve, 3... Controller, 7... Actuator, 7a... Upper cushion chamber, 7b... Lower cushion chamber, 11...
-Pressure accumulator, 40...pneumatic spring. Figure 3
Claims (1)
圧を使用し閉弁時にはばねを使用するものにおいて、作
動油を加圧して蓄える蓄圧器（１１）と、吸，排気弁（
６）の上端に当接し吸，排気弁を開弁するアクチュエー
タ（７）と、該蓄圧器と前記アクチュエータとの間の配
管内に設けられた開弁電磁弁（１）と、常時、吸，排気
弁を閉じる方向に付勢するばね（４０）と、閉弁時前記
アクチュエータ内の作動油をタンクに戻す閉弁電磁弁（
２）と、前記弁開，閉用電磁弁をそれぞれ適正なタイミ
ングで開閉制御するコントローラ（３）とを有してなる
内燃機関の動弁装置。Diesel engines that use hydraulic pressure to open the exhaust or intake valves and springs to close them include a pressure accumulator (11) that pressurizes and stores hydraulic oil, and intake and exhaust valves (11).
An actuator (7) that contacts the upper end of 6) and opens the suction and exhaust valves, and an opening solenoid valve (1) provided in the piping between the pressure accumulator and the actuator, and A spring (40) biases the exhaust valve in the direction of closing, and a closing solenoid valve (40) that returns the hydraulic oil in the actuator to the tank when the valve is closed.
2); and a controller (3) that controls opening and closing of the valve opening and closing electromagnetic valves at appropriate timings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2117630A JPH0417704A (en) | 1990-05-09 | 1990-05-09 | Valve system for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2117630A JPH0417704A (en) | 1990-05-09 | 1990-05-09 | Valve system for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0417704A true JPH0417704A (en) | 1992-01-22 |
Family
ID=14716476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2117630A Pending JPH0417704A (en) | 1990-05-09 | 1990-05-09 | Valve system for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0417704A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000065232A (en) * | 1998-06-11 | 2000-03-03 | Unisia Jecs Corp | Engine valve electromagnetic drive |
| KR100355495B1 (en) * | 1999-12-10 | 2002-10-11 | 허장은 | A Fragrance Hair Pin |
| JP2009191714A (en) * | 2008-02-14 | 2009-08-27 | Man Diesel Filial Af Man Diesel Se Tyskland | Exhaust valve actuator for large two-cycle diesel engines |
| JP2012026299A (en) * | 2010-07-20 | 2012-02-09 | Isuzu Motors Ltd | Device for opening and closing of camless engine valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113228A (en) * | 1982-12-07 | 1984-06-29 | エム・エイ・エヌ−ビ−・アンド・ダブリュ・ディ−ゼル，ア−／エス | Fluid operating mechanism |
-
1990
- 1990-05-09 JP JP2117630A patent/JPH0417704A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113228A (en) * | 1982-12-07 | 1984-06-29 | エム・エイ・エヌ−ビ−・アンド・ダブリュ・ディ−ゼル，ア−／エス | Fluid operating mechanism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000065232A (en) * | 1998-06-11 | 2000-03-03 | Unisia Jecs Corp | Engine valve electromagnetic drive |
| KR100355495B1 (en) * | 1999-12-10 | 2002-10-11 | 허장은 | A Fragrance Hair Pin |
| JP2009191714A (en) * | 2008-02-14 | 2009-08-27 | Man Diesel Filial Af Man Diesel Se Tyskland | Exhaust valve actuator for large two-cycle diesel engines |
| JP2012026299A (en) * | 2010-07-20 | 2012-02-09 | Isuzu Motors Ltd | Device for opening and closing of camless engine valve |
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