JPH0452464Y2 - - Google Patents
Info
- Publication number
- JPH0452464Y2 JPH0452464Y2 JP1986056012U JP5601286U JPH0452464Y2 JP H0452464 Y2 JPH0452464 Y2 JP H0452464Y2 JP 1986056012 U JP1986056012 U JP 1986056012U JP 5601286 U JP5601286 U JP 5601286U JP H0452464 Y2 JPH0452464 Y2 JP H0452464Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- driving oil
- fuel gas
- gas injection
- injection valve
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はガス焚きデイーゼル機関の燃料ガス噴
射弁に適用される、駆動油戻りラインの絞りと逃
し弁に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a throttle and relief valve for a driving oil return line, which is applied to a fuel gas injection valve of a gas-fired diesel engine.
従来のガス焚きデイーゼル機関のガス弁駆動系
を第４図を参照して説明する。
A gas valve drive system of a conventional gas-fired diesel engine will be explained with reference to FIG.
ガス焚きデイーゼル機関の燃料ガス噴射弁は針
弁０３、ノズルボデー０４、ノズルチツプ０５で
構成されている。高圧に蓄圧された燃料ガスは燃
料ガスライン０６より供給されている。駆動油ラ
イン０１を経て駆動油溜り０２に達した駆動油の
上昇に伴ない針弁０３が上昇すると前記燃料ガス
はシリンダ内に噴射される。逆に駆動油圧が低下
すると針弁が図示しないノズルばねにより押し下
げられ燃料ガスの噴射は終了する。 A fuel gas injection valve for a gas-fired diesel engine is composed of a needle valve 03, a nozzle body 04, and a nozzle tip 05. Fuel gas stored at a high pressure is supplied from a fuel gas line 06. When the needle valve 03 rises as the driving oil reaches the driving oil reservoir 02 via the driving oil line 01, the fuel gas is injected into the cylinder. Conversely, when the drive oil pressure decreases, the needle valve is pushed down by a nozzle spring (not shown) and the fuel gas injection ends.
前記従来形の燃料ガス噴射弁では駆動油ライン
０１が袋小路で行き止まりになつており、駆動油
が循環せず高温となるため、駆動油が劣化し易
い。又針弁着座時に針弁０３の下降に伴ない駆動
油溜り０２内の油は駆動油ラインに逆流して戻る
しかなく、従来の燃料自体で針弁を駆動させる燃
料噴射弁システムに比べ針弁（ノズルチツプ）０
５の着座速度が遅く、その結果燃料切れが悪く後
燃えの増加、機関性能悪化の要因となつている。
In the conventional fuel gas injection valve, the driving oil line 01 is a dead end, and the driving oil does not circulate and becomes high temperature, so that the driving oil easily deteriorates. In addition, when the needle valve is seated, the oil in the driving oil reservoir 02 as the needle valve 03 descends has no choice but to flow back into the driving oil line and return to the driving oil line. (Nozzle tip) 0
5's seating speed is slow, resulting in poor fuel exhaustion, increased afterburning, and deterioration of engine performance.
本考案の目的は前記従来装置の問題点を解消
し、駆動油の劣化を防ぎ駆動系の信頼性を向上さ
せ、針弁の着座速度を早くし燃料切れをよくし、
機関性能を向上をはかつたガス焚きデイーゼル機
関の燃料ガス噴射弁を提供するにある。 The purpose of the present invention is to solve the problems of the conventional device, prevent the deterioration of the driving oil, improve the reliability of the drive system, increase the seating speed of the needle valve, and improve fuel depletion.
An object of the present invention is to provide a fuel gas injection valve for a gas-fired diesel engine that improves engine performance.
本考案は前記問題点を解決するために行われた
もので、第２図に示すようにガス焚きデイーゼル
機関の燃料ガス噴射弁において、駆動油の戻りラ
イン８を設けるとともに、そのラインのガス弁出
口直後に絞り９と針弁３の啓開圧よりも少し低目
の啓開圧にセツトした逃し弁７を取り付けたもの
である。
The present invention was made to solve the above problem, and as shown in Fig. 2, in a fuel gas injection valve of a gas-fired diesel engine, a driving oil return line 8 is provided, and the gas valve Immediately after the exit, a relief valve 7 is installed which is set at a slightly lower opening pressure than the opening pressure of the needle valve 3 and the throttle 9.
〔作用〕
針弁３の駆動油を駆動油戻りライン８に循環さ
せるようにしたので、駆動油溜り２内の駆動油は
リフレツシユされ、油の劣化が抑制される。又針
弁３の着座時の針弁段差部分の移動体積に相当す
る駆動油の逃げが、従来の駆動油ライン１の他戻
りライン８にも逃げるように改善され、針弁３の
着座速度が早くなる。これにより燃料噴射の切れ
をよくし後燃えを減少させ、機関性能を向上させ
ることができる。[Operation] Since the driving oil of the needle valve 3 is circulated through the driving oil return line 8, the driving oil in the driving oil reservoir 2 is refreshed and deterioration of the oil is suppressed. In addition, the escape of driving oil corresponding to the displacement volume of the needle valve step portion when the needle valve 3 is seated is improved so that it escapes to the return line 8 in addition to the conventional driving oil line 1, and the seating speed of the needle valve 3 is improved. It gets faster. This improves the sharpness of fuel injection, reduces afterburning, and improves engine performance.
以下第１〜３図を参照し本考案の一実施例につ
いて説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図は本考案によるガス弁の実施例の断面
図、第２図は駆動油の戻りラインの要部であるガ
ス噴射弁直後の絞り９と逃し弁７を含んだ作動弁
の断面図、第３図はクランク角に対する駆動油圧
と針弁リフトと逃し弁リフトの作動特性を示す線
図である。 FIG. 1 is a sectional view of an embodiment of the gas valve according to the present invention, and FIG. 2 is a sectional view of an operating valve including a throttle 9 and a relief valve 7 immediately after the gas injection valve, which are the main parts of the drive oil return line. FIG. 3 is a diagram showing operating characteristics of drive oil pressure, needle valve lift, and relief valve lift with respect to crank angle.
１は駆動油ライン、２は駆動油溜り、３は針
弁、４はノズルボデー、５はノズルチツプ、６は
燃料ガスライン、７は逃し弁、８は駆動油戻りラ
イン、９は絞りである。 1 is a drive oil line, 2 is a drive oil reservoir, 3 is a needle valve, 4 is a nozzle body, 5 is a nozzle tip, 6 is a fuel gas line, 7 is a relief valve, 8 is a drive oil return line, and 9 is a throttle.
本考案の実施例では第１図に示すように燃料ガ
ス噴射弁に駆動油戻りライン８を設け、そのライ
ンのガス噴射弁直後に第２図に示すような絞り弁
９と逃し弁７を含んだ作動弁を設けたものであ
る。 In the embodiment of the present invention, the fuel gas injection valve is provided with a driving oil return line 8 as shown in FIG. 1, and the line includes a throttle valve 9 and a relief valve 7 as shown in FIG. 2 immediately after the gas injection valve. It is equipped with a double-operated valve.
駆動油が駆動油ライン１を経て駆動油溜り２に
導入されると、針弁３が押し上げられて開弁し、
燃料ガスライン６を経た燃料ガスがノズルチツプ
５の噴孔（図示せず）よりシリンダ内に噴射され
る。絞り９により所定量減圧された駆動油の圧力
が逃し弁７の設定圧を超えると逃し弁７が開弁
し、駆動油の一部は戻りライン８を経て外部に排
出される。 When the driving oil is introduced into the driving oil reservoir 2 through the driving oil line 1, the needle valve 3 is pushed up and opened.
The fuel gas that has passed through the fuel gas line 6 is injected into the cylinder from a nozzle hole (not shown) of the nozzle tip 5. When the pressure of the driving oil reduced by a predetermined amount by the throttle 9 exceeds the set pressure of the relief valve 7, the relief valve 7 opens and a portion of the driving oil is discharged to the outside via the return line 8.
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.
針弁３の駆動油が噴射毎に戻りライン８を通り
循環するようにしたので、油の劣化を大幅に抑制
することができる。 Since the driving oil for the needle valve 3 is circulated through the return line 8 every time it is injected, deterioration of the oil can be significantly suppressed.
又本考案のガス焚きデイーゼル機関の燃料ガス
噴射弁では第３図の線図で示すように、駆動油圧
が降下し始めても針弁３が閉じるまでの期間は、
逃し弁７と針弁３が共に開いているため、駆動油
の逃げ量が多く圧力の降下率が従来のガス弁に比
べより大きくなる。従つて燃料切れが良くなり、
燃焼状態の改善とりわけ後焼えが減少するため、
機関性能を大幅に向上させることができる。 Furthermore, in the fuel gas injection valve of the gas-fired diesel engine of the present invention, as shown in the diagram in FIG.
Since both the relief valve 7 and the needle valve 3 are open, the amount of drive oil that escapes is large, and the rate of pressure drop is greater than that of a conventional gas valve. Therefore, fuel consumption becomes better,
Improved combustion conditions, especially reduced afterburn,
Engine performance can be significantly improved.
本考案は以上のように構成したので、ガス焚き
デイーゼル機関の燃料ガス噴射弁の駆動油の劣化
を抑制し該燃料ガス噴射弁駆動系の信頼性を向上
させることができる。また針弁の着座速度が大幅
に促進されるため、燃料噴射後期の燃料切れをよ
くなり後燃えが減少し、機関性能を大幅に向上さ
せることができる。
Since the present invention is configured as described above, it is possible to suppress deterioration of the driving oil for the fuel gas injection valve of a gas-fired diesel engine and improve the reliability of the fuel gas injection valve drive system. Additionally, since the seating speed of the needle valve is greatly accelerated, fuel runs out in the latter stages of fuel injection is improved, afterburning is reduced, and engine performance can be significantly improved.
第１〜３図は本考案に係るもので第１図は燃料
ガス噴射弁の縦断面図、第２図は駆動油の戻りラ
インで燃料ガス噴射弁直後に設けられた作動弁の
断面図、第３図はクランク角に対する駆動油圧と
針弁リフトと逃し弁リフトの作動特性線図、第４
図は従来形燃料ガス噴射弁の第１図応当図であ
る。
２……駆動油溜り、３……針弁、７……逃し
弁、８……駆動油戻りライン、９……絞り、１０
……燃料ガス噴射弁。
Figures 1 to 3 are related to the present invention; Figure 1 is a longitudinal cross-sectional view of the fuel gas injection valve, Figure 2 is a cross-sectional view of the operating valve provided immediately after the fuel gas injection valve in the drive oil return line; Figure 3 is an operating characteristic diagram of drive oil pressure, needle valve lift, and relief valve lift with respect to crank angle.
The figure is a corresponding diagram of FIG. 1 of a conventional fuel gas injection valve. 2... Drive oil reservoir, 3... Needle valve, 7... Relief valve, 8... Drive oil return line, 9... Throttle, 10
...Fuel gas injection valve.
Claims (1)
いて、針弁の駆動油溜りに連通される駆動油の戻
りラインを設けるとともに、該戻りラインの燃料
ガス噴射弁出口近傍に絞りを設け、該絞りの下流
側に逃し弁を設けたことを特徴とするガス焚きデ
イーゼル機関の燃料ガス噴射弁。 In a fuel gas injection valve of a gas-fired diesel engine, a driving oil return line is provided that communicates with the driving oil reservoir of the needle valve, and a restriction is provided in the vicinity of the fuel gas injection valve outlet of the return line, and the downstream side of the restriction is provided. A fuel gas injection valve for a gas-fired diesel engine, characterized in that it is equipped with a relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986056012U JPH0452464Y2 (en) | 1986-04-16 | 1986-04-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986056012U JPH0452464Y2 (en) | 1986-04-16 | 1986-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62167856U JPS62167856U (en) | 1987-10-24 |
| JPH0452464Y2 true JPH0452464Y2 (en) | 1992-12-09 |
Family
ID=30884442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986056012U Expired JPH0452464Y2 (en) | 1986-04-16 | 1986-04-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452464Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101139179B1 (en) * | 2010-07-02 | 2012-04-26 | 현대중공업 주식회사 | Dual fuel injector valve with pumping nozzle for diesel and gas engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK155757C (en) * | 1985-08-01 | 1989-09-25 | Man B & W Diesel As | FUEL INJECTOR FOR A GAS FUEL ENGINE |
-
1986
- 1986-04-16 JP JP1986056012U patent/JPH0452464Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62167856U (en) | 1987-10-24 |
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