JPH0235847B2 - - Google Patents
Info
- Publication number
- JPH0235847B2 JPH0235847B2 JP58075572A JP7557283A JPH0235847B2 JP H0235847 B2 JPH0235847 B2 JP H0235847B2 JP 58075572 A JP58075572 A JP 58075572A JP 7557283 A JP7557283 A JP 7557283A JP H0235847 B2 JPH0235847 B2 JP H0235847B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust hole
- piston
- closing piston
- exhaust
- 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 - Lifetime
Links
- 238000001816 cooling Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000498 cooling water Substances 0.000 description 10
- 239000003921 oil Substances 0.000 description 8
- 238000007599 discharging Methods 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000002184 metal 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
- 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)
- Exhaust Silencers (AREA)
- Valve Device For Special Equipments (AREA)
Description
【発明の詳細な説明】
本発明は排気制御装置用冷却装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for an exhaust gas control device.
掃気効率が良いことで知られるユニフロー掃気
式デイーゼル機関において、排気孔の開閉をピス
トンで行なうピストン制御孔型の排気装置は、従
来機械的な結合による駆動方式が採られており、
この方式では排気孔開閉ピストンを駆動するため
の側棒、別のクランクと歯車等を用いねばなら
ず、構造が複雑になり、且つ機関の高さが増す等
の欠点があつた。しかしこの方式は従来の排気弁
駆動方式と比較すると、弁棒、弁座シート部のメ
タルタツチが無いため、排気弁の吹抜け、クラツ
ク等の事故から解放される特長を有している。 In uniflow scavenging diesel engines, which are known for their high scavenging efficiency, the piston control hole type exhaust system, which uses a piston to open and close the exhaust hole, has traditionally been driven by a mechanical connection.
This system required the use of side rods, separate cranks, gears, etc. to drive the exhaust hole opening/closing pistons, resulting in a complicated structure and increased height of the engine. However, compared to the conventional exhaust valve drive system, this system has the advantage of being free from accidents such as exhaust valve blow-through and cracks because there is no metal contact between the valve stem and the valve seat.
本発明は上記の排気孔開閉ピストンにより排気
孔を開閉制御するようにした装置の特長を利用し
つつ、ハウジングの排気孔周辺部及び排気孔開閉
ピストンを極めて簡単な構成で冷却できるように
することを目的とする。 The present invention utilizes the features of the device in which the opening and closing of the exhaust hole is controlled by the exhaust hole opening/closing piston described above, while also making it possible to cool the area around the exhaust hole of the housing and the exhaust hole opening/closing piston with an extremely simple configuration. With the goal.
以下、本発明を実施の一例を示す図面に基づい
て説明する。図において１は排気孔制御用の排気
ピストンハウジングで、これは機関燃焼室２の上
部に取り付けられ、このハウジング１の内部には
上下方向に移動可能な排気孔開閉ピストン３及び
このピストン３の上方に段付きロツド４により結
合された油圧作動ピストン５が設けられ、このピ
ストン５によつてその上部側に油室６が、下部側
に中間室７が形成されている。中間室７には前記
排気孔開閉ピストン３を、設定された下死点でロ
ツクするストツパー８及びこのストツパー８を駆
動する制御シリンダ９を備えている。そしてこの
制御シリンダ９は油圧室９ａ、ばね９ｂ、ピスト
ン９ｃを備え、このピストン９ｃと連動する連結
リンク９ｄによつてストツパー８と結合されてい
る。８ａはストツパー８の枢支軸である。又前記
油室６は導管１０を介してカムローラ１１上部の
油圧ピストン室１２と結合されている。１３は排
気孔開閉ピストン３を冷却するための冷却水供給
管で、排気孔開閉ピストン３に接続された給水用
二重スライド管１４に前記中間室７で結合されて
いる。給水用二重スライド管１４の固定側外管１
４ａは前記ハウジング１の冷却室１５を貫通して
下端がハウジング１の一部〔排気孔開閉ピストン
ストツパー部１６〕に支持されている。又スライ
ドする内管１４ｂが前記排気孔開閉ピストン３に
接続されている。１７は排気孔開閉ピストン３内
を通つて該ピストン３内の冷却に使用された冷却
水を排出するための排水用二重スライド管で、こ
の排水用二重スライド管１７の固定側外管１７ａ
はハウジング１の冷却室１５内に位置して下端が
排気孔開閉ピストンストツパー部１６に支持さ
れ、又スライドする内管１７ｂは前記排気孔開閉
ピストン３に接続されている。この排水用二重ス
ライド管１７の外管１７ａの上端は前記冷却室１
５内において開口しており、排気孔開閉ピストン
３の冷却に供された冷却水を冷却室１５内に排出
し冷却室１５を冷却するように構成している。 Hereinafter, the present invention will be explained based on drawings showing an example of implementation. In the figure, reference numeral 1 denotes an exhaust piston housing for controlling exhaust holes, which is attached to the upper part of the engine combustion chamber 2. Inside this housing 1, there is an exhaust hole opening/closing piston 3 that can move in the vertical direction and an upper part of this piston 3. A hydraulically actuated piston 5 is provided which is connected by a stepped rod 4, and this piston 5 forms an oil chamber 6 on its upper side and an intermediate chamber 7 on its lower side. The intermediate chamber 7 is provided with a stopper 8 for locking the exhaust hole opening/closing piston 3 at a set bottom dead center, and a control cylinder 9 for driving the stopper 8. The control cylinder 9 includes a hydraulic chamber 9a, a spring 9b, and a piston 9c, and is connected to the stopper 8 by a connecting link 9d that interlocks with the piston 9c. 8a is a pivot shaft of the stopper 8. Further, the oil chamber 6 is connected to a hydraulic piston chamber 12 above a cam roller 11 via a conduit 10. Reference numeral 13 denotes a cooling water supply pipe for cooling the exhaust hole opening/closing piston 3, which is connected to a water supply double slide pipe 14 connected to the exhaust hole opening/closing piston 3 in the intermediate chamber 7. Fixed side outer pipe 1 of double slide pipe 14 for water supply
4a passes through the cooling chamber 15 of the housing 1, and its lower end is supported by a part of the housing 1 (exhaust hole opening/closing piston stopper part 16). Also, a sliding inner tube 14b is connected to the exhaust hole opening/closing piston 3. Reference numeral 17 denotes a drainage double slide pipe for discharging the cooling water used for cooling the piston 3 through the exhaust hole opening/closing piston 3, and the fixed side outer pipe 17a of this drainage double slide pipe 17
is located in the cooling chamber 15 of the housing 1, and its lower end is supported by the exhaust hole opening/closing piston stopper portion 16, and a sliding inner tube 17b is connected to the exhaust hole opening/closing piston 3. The upper end of the outer pipe 17a of this double slide pipe 17 for drainage is connected to the cooling chamber 1.
5 , and is configured to discharge the cooling water used for cooling the exhaust hole opening/closing piston 3 into the cooling chamber 15 to cool the cooling chamber 15 .
次に排気孔開閉ピストン３の動作について説明
する。排気孔開閉ピストン３がハウジング１下端
の排気孔１８を閉じている状態では前記中間室７
に設けられた制御シリンダ９の油圧室９ａに圧油
が供給されており、その力によつてピストン９ｃ
はばね９ｂを押圧し、連結リンク９ｄを介してス
トツパー８を段付きロツド４の段部４ａに係合さ
せている。このストツパー８によつて燃焼室内ガ
ス圧力による上向きの力を押さえている。排気孔
１８を閉じている状態から開く場合は、予じめ設
定された時点で油圧室９ａへの圧油を減らすと、
ばね９ｂの復元力によつてストツパー８は引かれ
て段付きロツド４との係合が解除され、排気孔開
閉ピストン３は燃焼室内ガス圧力によつて押し上
げられて排気孔１８は開かれると共に、前記油室
６の作動油は油圧作動ピストン５により昇圧され
る。昇圧された油圧は導管１０及びカムローラ１
１上部の油圧ピストン室１２を介してカム軸１９
に伝えられる。２０はカム軸１９に設けられたカ
ムで、前記カムローラ１１と接当している。又排
気孔１８を閉じる場合は排気孔開閉ピストン３が
押し下げられる。即ち前記カム２０によつてカム
ローラ１１が押し上げられ、カムローラ１１上部
の油圧ピストン室１２で発生した圧力が油室６に
伝えられる。その結果、油圧作動ピストン５は下
動し、排気孔開閉ピストン３により排気孔１８を
閉じる。排気孔開閉ピストン３が設定された下死
点に到る時期に前記制御シリンダ９の油圧室９ａ
に圧油を供給すると、前記ストツパー８が段付き
ロツド４の段部４ａに係合し、排気孔閉塞ストロ
ークを完了する。尚図中２１は内燃機関のピスト
ンである。 Next, the operation of the exhaust hole opening/closing piston 3 will be explained. When the exhaust hole opening/closing piston 3 closes the exhaust hole 18 at the lower end of the housing 1, the intermediate chamber 7
Pressure oil is supplied to the hydraulic chamber 9a of the control cylinder 9 provided in the control cylinder 9, and its force causes the piston 9c to move.
The spring 9b is pressed to engage the stopper 8 with the stepped portion 4a of the stepped rod 4 via the connecting link 9d. This stopper 8 suppresses the upward force caused by the gas pressure within the combustion chamber. When opening the exhaust hole 18 from a closed state, reduce the pressure oil to the hydraulic chamber 9a at a preset time.
The stopper 8 is pulled by the restoring force of the spring 9b and disengaged from the stepped rod 4, and the exhaust hole opening/closing piston 3 is pushed up by the gas pressure in the combustion chamber and the exhaust hole 18 is opened. The hydraulic oil in the oil chamber 6 is pressurized by the hydraulic piston 5. The increased hydraulic pressure is transferred to the conduit 10 and the cam roller 1.
1 through the upper hydraulic piston chamber 12 to the camshaft 19
can be conveyed to. A cam 20 is provided on the cam shaft 19 and is in contact with the cam roller 11. Further, when closing the exhaust hole 18, the exhaust hole opening/closing piston 3 is pushed down. That is, the cam roller 11 is pushed up by the cam 20, and the pressure generated in the hydraulic piston chamber 12 above the cam roller 11 is transmitted to the oil chamber 6. As a result, the hydraulic piston 5 moves downward and the exhaust hole opening/closing piston 3 closes the exhaust hole 18 . When the exhaust hole opening/closing piston 3 reaches the set bottom dead center, the hydraulic chamber 9a of the control cylinder 9
When pressure oil is supplied to the stopper 8, the stopper 8 engages with the stepped portion 4a of the stepped rod 4, completing the exhaust hole closing stroke. Note that 21 in the figure is a piston of the internal combustion engine.
以上述べた装置において、高温の燃焼ガスにさ
らされる部分の冷却のために、前記ハウジング１
の排気孔周辺部は当然のことながら水冷却されて
おり、冷却室１５を備えている。ところで排気孔
開閉ピストン３も高温にさらされることから該ピ
ストン３も冷却させる必要がある。そこで本発明
は排気孔開閉ピストン３のすぐ上部に冷却室１５
があることに着目し、前述の如く冷却水供給管１
３から給水用二重スライド管１４を介して排気孔
開閉ピストン３内に冷却水を供給して該ピストン
３を冷却すると共に、該ピストン３冷却後の水を
排水用二重スライド管１７を介して冷却室１５に
排出して冷却室１５内でも使用するようにし、冷
却系統を単純化している。以上のハウジング１の
排気孔周辺部及び排気孔開閉ピストン３の冷却は
これらが一定温度以上になつたときに行なうよう
になつている。尚前記排気孔開閉ピストン３に接
続されるスライド可能な内管１４ｂ，１７ｂも高
温の排気ガスにさらされることから、これらは耐
熱材で被覆されている。又図面では示されていな
いが、前記冷却室１５内に排出された冷却水は冷
却室１５内を冷却した後順次外部に排出するよう
構成されている。 In the apparatus described above, the housing 1 is
The area around the exhaust hole is naturally water-cooled, and is provided with a cooling chamber 15. Incidentally, since the exhaust hole opening/closing piston 3 is also exposed to high temperatures, it is necessary to cool the piston 3 as well. Therefore, the present invention provides a cooling chamber 15 immediately above the exhaust hole opening/closing piston 3.
Focusing on the fact that there is, as mentioned above, the cooling water supply pipe 1
Cooling water is supplied into the exhaust hole opening/closing piston 3 from 3 through the water supply double slide pipe 14 to cool the piston 3, and the water after cooling the piston 3 is discharged through the drainage double slide pipe 17. The cooling system is simplified by discharging it into the cooling chamber 15 and using it inside the cooling chamber 15 as well. The above-mentioned cooling of the exhaust hole surrounding area of the housing 1 and the exhaust hole opening/closing piston 3 is carried out when these areas reach a certain temperature or higher. Incidentally, since the slidable inner tubes 14b and 17b connected to the exhaust hole opening/closing piston 3 are also exposed to high-temperature exhaust gas, these are covered with a heat-resistant material. Although not shown in the drawings, the cooling water discharged into the cooling chamber 15 is configured to cool the inside of the cooling chamber 15 and then sequentially discharged to the outside.
本発明は以上述べたように実施し得るものであ
り、排気孔開閉ピストンを冷却するために供給さ
れた冷却水は該ピストン上部の冷却室内に排出し
て冷却室内でも使用するようにしたため、排気孔
開閉ピストン冷却のための冷却水の外部につなが
る配管は供給側のみ設ければ良く、構成を簡略化
できる。また、排気孔開閉ピストンへの冷却水の
供給に二重スライド管を使用するので、ロツドや
ハウジングに給排水孔を形成する必要がなく低コ
ストとなり、その組立ても容易に行うことができ
る。 The present invention can be carried out as described above, and the cooling water supplied to cool the exhaust hole opening/closing piston is discharged into the cooling chamber above the piston and used also in the cooling chamber. The piping connected to the outside of the cooling water for cooling the hole-opening/closing piston only needs to be provided on the supply side, and the configuration can be simplified. Furthermore, since a double slide pipe is used to supply cooling water to the exhaust hole opening/closing piston, there is no need to form water supply and drainage holes in the rod or housing, resulting in low cost and easy assembly.
尚実施例で述べたように、排気孔開閉ピストン
３に接続される内管１４ｂ，１７ｂを耐熱材で被
覆することにより、大げさな管保護装置の必要が
なくなり、排気孔開閉ピストンの軽量化が計れ
る。 As described in the embodiment, by covering the inner pipes 14b and 17b connected to the exhaust hole opening/closing piston 3 with a heat-resistant material, there is no need for an exaggerated pipe protection device, and the weight of the exhaust hole opening/closing piston can be reduced. It can be measured.
図面は本発明の実施の一例を示す縦断面図であ
る。
１……ハウジング、２……機関燃焼室、３……
排気孔開閉ピストン、４……段付きロツド、４ａ
……段部、５……油圧作動ピストン、６……油
室、７……中間室、８……ストツパー、９……制
御シリンダ、９ａ……油圧室、９ｂ……ばね、９
ｃ……ピストン、９ｄ……連結リンク、１０……
導管、１１……カムローラ、１２……油圧ピスト
ン室、１３……冷却水供給管、１４……給水用二
重スライド管、１４ａ……外管、１４ｂ……内
管、１５……冷却室、１６……ストツパー部、１
７……排水用二重スライド管、１７ａ……外管、
１７ｂ……内管、１８……排気孔、１９……カム
軸、２０……カム。
The drawing is a longitudinal sectional view showing an example of implementation of the present invention. 1...Housing, 2...Engine combustion chamber, 3...
Exhaust hole opening/closing piston, 4...Stepped rod, 4a
... Stepped portion, 5 ... Hydraulic operation piston, 6 ... Oil chamber, 7 ... Intermediate chamber, 8 ... Stopper, 9 ... Control cylinder, 9a ... Hydraulic chamber, 9b ... Spring, 9
c...Piston, 9d...Connection link, 10...
Conduit, 11...Cam roller, 12...Hydraulic piston chamber, 13...Cooling water supply pipe, 14...Double slide pipe for water supply, 14a...Outer pipe, 14b...Inner pipe, 15...Cooling chamber, 16...Stopper part, 1
7...Double slide pipe for drainage, 17a...Outer pipe,
17b...inner pipe, 18...exhaust hole, 19...camshaft, 20...cam.
Claims (1)
トンハウジングを設け、このハウジングに、ハウ
ジングの下端に形成した排気孔を開閉する上下動
自在な排気孔開閉ピストンと、この排気口開閉ピ
ストンの上方に連結されて排気口開閉ピストンを
上下動させるロツドと、排気口開閉ピストンの上
死点を規制するストツパー部の上部に形成された
冷却室とを設け、冷却水供給管と排気口開閉ピス
トンとを、前記ストツパー部にロツドと平行に貫
通されてスライド自在な給水用二重スライド管を
介して接続し、排気口開閉ピストンと冷却室と
を、前記ストツパー部にロツドと平行に貫通され
てスライド自在な排水用二重スライド管を介して
接続したことを特徴とする排気制御装置用冷却装
置。1. An exhaust piston housing for controlling the exhaust hole is provided in the upper part of the engine combustion chamber, and this housing includes an exhaust hole opening/closing piston that is vertically movable to open and close the exhaust hole formed at the lower end of the housing, and an upper part of the exhaust hole opening/closing piston. A rod connected to the exhaust port opening/closing piston to move the exhaust port opening/closing piston up and down, and a cooling chamber formed in the upper part of the stopper part regulating the top dead center of the exhaust port opening/closing piston are provided. is connected to the stopper part through a slidable double slide pipe for water supply, which passes through the rod in parallel with the rod, and connects the exhaust port opening/closing piston and the cooling chamber to the stopper part in parallel with the rod and slides therethrough. A cooling device for an exhaust control device, characterized in that it is connected via a flexible double slide pipe for drainage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075572A JPS59201909A (en) | 1983-04-28 | 1983-04-28 | Cooling device for exhaust control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075572A JPS59201909A (en) | 1983-04-28 | 1983-04-28 | Cooling device for exhaust control equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59201909A JPS59201909A (en) | 1984-11-15 |
| JPH0235847B2 true JPH0235847B2 (en) | 1990-08-14 |
Family
ID=13580029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58075572A Granted JPS59201909A (en) | 1983-04-28 | 1983-04-28 | Cooling device for exhaust control equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59201909A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4230364A1 (en) | 2022-02-10 | 2023-08-23 | SMC Corporation | Pad-equipped lift device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2572880Y2 (en) * | 1991-12-03 | 1998-05-25 | 大日本印刷株式会社 | Accessories for goebel top carton |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5038662U (en) * | 1973-07-31 | 1975-04-21 | ||
| JPS5357310A (en) * | 1976-11-02 | 1978-05-24 | Mitsubishi Heavy Ind Ltd | Exhaust device for internal combusion engine |
| JPS5865921A (en) * | 1981-09-22 | 1983-04-19 | エム・エイ・エヌ−ビ−・アンド・ダヴリュ・ディ−ゼル、ア−／エス | Exhaust valve for internal combustion engine |
-
1983
- 1983-04-28 JP JP58075572A patent/JPS59201909A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5038662U (en) * | 1973-07-31 | 1975-04-21 | ||
| JPS5357310A (en) * | 1976-11-02 | 1978-05-24 | Mitsubishi Heavy Ind Ltd | Exhaust device for internal combusion engine |
| JPS5865921A (en) * | 1981-09-22 | 1983-04-19 | エム・エイ・エヌ−ビ−・アンド・ダヴリュ・ディ−ゼル、ア−／エス | Exhaust valve for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4230364A1 (en) | 2022-02-10 | 2023-08-23 | SMC Corporation | Pad-equipped lift device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59201909A (en) | 1984-11-15 |
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