JPH0584816B2 - - Google Patents
Info
- Publication number
- JPH0584816B2 JPH0584816B2 JP8513886A JP8513886A JPH0584816B2 JP H0584816 B2 JPH0584816 B2 JP H0584816B2 JP 8513886 A JP8513886 A JP 8513886A JP 8513886 A JP8513886 A JP 8513886A JP H0584816 B2 JPH0584816 B2 JP H0584816B2
- Authority
- JP
- Japan
- Prior art keywords
- scavenging
- scavenging hole
- exhaust valve
- piston
- drive
- 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
- 230000002000 scavenging effect Effects 0.000 claims description 25
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Landscapes
- Valve Device For Special Equipments (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は２サイクルデイーゼル機関の掃気孔管
制装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scavenging hole control device for a two-stroke diesel engine.
従来は実用化された機械的掃気孔管制装置は見
当らない。
Until now, no mechanical scavenging hole control device has been put to practical use.
掃気孔の開閉をコントロールする掃気孔管制装
置をピストンの動きと同期させて駆動するために
は、クランク軸より取り出した駆動軸により駆動
するか、あるいはカム軸より取り出した駆動軸に
より駆動する方法等が考えられるが、これらはい
ずれも装置が大掛りとなり実用的ではない。
In order to drive the scavenging hole control device, which controls the opening and closing of the scavenging holes, in synchronization with the movement of the piston, there are two methods: drive it with a drive shaft taken out from the crankshaft, or drive it with a drive shaft taken out from the camshaft. However, both require large-scale equipment and are not practical.
ところが駆動装置を設置するジヤケツト掃気室
は、スペース的に非常に狭く大掛りな装置は実用
上設置が困難である。 However, the jacket scavenging chamber in which the drive device is installed is very narrow in terms of space, making it difficult to install a large-scale device in practice.
本発明の目的は前記従来装置の問題点を解消
し、良好な掃排気タイミングが得られ機関性能の
向上が達成できるコンパクトな掃気管制管装置を
提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a compact scavenging air control system that solves the problems of the conventional apparatus, provides good scavenging and exhaust timing, and improves engine performance.
本発明の掃気孔管制装置は、前記問題点を解決
するためになされたもので、排気弁駆動油ライン
の一部を分岐し、駆動源として使用している。
The scavenging hole control device of the present invention was developed to solve the above-mentioned problems, and a part of the exhaust valve driving oil line is branched off and used as a driving source.
前記のとおり構成したので、掃気孔は排気弁の
開閉タイミングとほぼ同じタイミングで開閉さ
れ、掃気に必要な期間のみ掃気孔を開け、他の期
間は掃気孔を閉状態とすることができる。
With the configuration described above, the scavenging hole is opened and closed at substantially the same timing as the opening and closing timing of the exhaust valve, and the scavenging hole can be opened only during the period necessary for scavenging, and the scavenging hole can be kept closed during other periods.
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。第１図はユニフロー２サイクルデ
イーゼルエンジンの掃気孔管制装置の要部説明
図、第２図は同エンジンの一般的排気弁開弁タイ
ミング（Ａ期間）と掃気孔開孔タイミング（Ｂ期
間）を示している。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Fig. 1 is an explanatory diagram of the main parts of the scavenging hole control device of the Uniflow 2-cycle diesel engine, and Fig. 2 shows the general exhaust valve opening timing (A period) and scavenging hole opening timing (B period) of the same engine. ing.
第１図において排気弁１の駆動は、排気カム２
によつて押し上げられる油圧ピストン３より吐出
される作動油が第１駆動ピストン４を押し下げる
ことによつて行われる。シリンダライナ５に削設
された掃気孔６は、その外周に環装された管制リ
ング７を介してピストン８の動きと同期して開閉
される。又この管制リング７の駆動は、第２駆動
ピストン９の下部付近において排気弁駆動油ライ
ンより分岐して取り出した作動油１０を供給する
ことにより行つている。 In FIG. 1, the exhaust valve 1 is driven by the exhaust cam 2.
This is done by the hydraulic oil discharged from the hydraulic piston 3 pushed up by the first driving piston 4 pushing down the first driving piston 4. The scavenging hole 6 cut into the cylinder liner 5 is opened and closed in synchronization with the movement of the piston 8 via a control ring 7 fitted around its outer periphery. The control ring 7 is driven by supplying hydraulic oil 10 branched from the exhaust valve driving oil line near the lower part of the second driving piston 9.
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.
排気弁駆動油ラインより分岐した作動油１０に
より第２駆動ピストン９を介して管制リング７が
駆動されているため、良好なる掃排気タイミング
が得られる。 Since the control ring 7 is driven by the hydraulic oil 10 branched from the exhaust valve drive oil line via the second drive piston 9, good scavenging and exhaust timing can be obtained.
本発明は以上のように構成されているので、排
気弁が開弁している期間とほぼ等しい期間のみ掃
気孔が開孔し、他の期間は掃気孔を閉鎖すること
ができる。従つて良好な掃排気タイミングがコン
パクトな掃気孔管制装置により得られ、機関性能
の向上が容易に実現できる。
Since the present invention is configured as described above, the scavenging hole can be opened only during a period approximately equal to the period when the exhaust valve is open, and the scavenging hole can be closed during other periods. Therefore, good scavenging and exhaust timing can be obtained with a compact scavenging hole control device, and engine performance can be easily improved.
第１図はユニフロー２サイクルデイーゼルエン
ジンの掃気孔管制装置の要部説明図、第２図は同
エンジンの一般的排気開弁タイミング（Ａ期間）
と掃気孔開孔タイミング（Ｂ期間）を示す弁線図
である。
１……排気弁、２……排気カム、３……油圧ポ
ンプ、４……第１駆動ピストン、５……シリンダ
ライナ、６……掃気孔、７……管制リング、９…
…第２駆動ピストン、１０……作動油。
Figure 1 is an explanatory diagram of the main parts of the scavenging hole control device of the Uniflow 2-cycle diesel engine, and Figure 2 is the general exhaust valve opening timing of the same engine (period A).
FIG. 3 is a valve diagram showing the scavenging hole opening timing (period B). DESCRIPTION OF SYMBOLS 1...Exhaust valve, 2...Exhaust cam, 3...Hydraulic pump, 4...First driving piston, 5...Cylinder liner, 6...Scavenging hole, 7...Control ring, 9...
...Second drive piston, 10...Hydraulic oil.
Claims (1)
駆動ピストン４を介して開閉する油圧ピストン３
と、シリンダライナ５の外周に設けられ掃気孔６
を外部よりコントロールする管制リング７と、排
気弁駆動油ラインより分岐した作動油１０により
第２駆動ピストン９を介して駆動される管制リン
クとを有してなる掃気孔管制装置。1 Driven by the exhaust cam 2 to move the exhaust valve 1 to the first
Hydraulic piston 3 that opens and closes via drive piston 4
and a scavenging hole 6 provided on the outer periphery of the cylinder liner 5.
A scavenging hole control device comprising: a control ring 7 for controlling externally; and a control link driven via a second drive piston 9 by hydraulic oil 10 branched from an exhaust valve drive oil line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8513886A JPS62243918A (en) | 1986-04-15 | 1986-04-15 | Scavenging hole controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8513886A JPS62243918A (en) | 1986-04-15 | 1986-04-15 | Scavenging hole controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62243918A JPS62243918A (en) | 1987-10-24 |
| JPH0584816B2 true JPH0584816B2 (en) | 1993-12-03 |
Family
ID=13850294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8513886A Granted JPS62243918A (en) | 1986-04-15 | 1986-04-15 | Scavenging hole controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62243918A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004035301B4 (en) * | 2004-07-21 | 2015-12-03 | Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland | diesel engine |
| JP6455312B2 (en) * | 2015-05-21 | 2019-01-23 | 株式会社Ihi | Uniflow scavenging 2-cycle engine |
| WO2018163237A1 (en) * | 2017-03-06 | 2018-09-13 | 株式会社Ihi | Uniflow scavenging type two-cycle engine |
| JP7127003B2 (en) * | 2019-10-30 | 2022-08-29 | 株式会社Ｉｈｉ原動機 | engine |
| JP7082962B2 (en) * | 2019-10-30 | 2022-06-09 | 株式会社Ｉｈｉ原動機 | engine |
-
1986
- 1986-04-15 JP JP8513886A patent/JPS62243918A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62243918A (en) | 1987-10-24 |
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