JP2007071105A - Fuel injector - Google Patents

Fuel injector Download PDF

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Publication number
JP2007071105A
JP2007071105A JP2005259018A JP2005259018A JP2007071105A JP 2007071105 A JP2007071105 A JP 2007071105A JP 2005259018 A JP2005259018 A JP 2005259018A JP 2005259018 A JP2005259018 A JP 2005259018A JP 2007071105 A JP2007071105 A JP 2007071105A
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valve
valve body
fuel
plate
injection
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JP4127703B2 (en
Inventor
Naoya Hashii
直也 橋居
Takeshi Munezane
毅 宗実
Yoshihiko Onishi
善彦 大西
Mamoru Sumita
守 住田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2005259018A priority Critical patent/JP4127703B2/en
Priority to CNB2006101536100A priority patent/CN100458138C/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel injector capable of improving atomization of a spray by forming various spray shapes and injection directions while restraining sticking of fuel to an injection port outlet. <P>SOLUTION: This fuel injector has a valve element 2 for opening and closing a valve seat 3b, and injects the fuel into an internal combustion engine by opening a valve when the valve element 2 moves to the downstream side. A plate 9 is arranged in its tip part. The plate 9 is provided with a projection part 9a opposed to a valve element end surface 2d. The plate 9 is also provided with a plurality of injection holes 9b inclining by a predetermined angle in the direction for separating from the axis of a valve device 1. The valve element end surface 2d contacts with the projection part 9a by opening the valve, and a cavity 10 is formed between the valve element end surface 2d and the plate 9, and the injection holes 9b are communicated with the cavity 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は内燃機関に使用される燃料噴射装置に関するものであり、特に燃料噴霧の形状および噴射方向を改良するとともに、微粒化を促進することのできる燃料噴射装置に関するものである。   The present invention relates to a fuel injection device used in an internal combustion engine, and more particularly to a fuel injection device capable of improving the shape and injection direction of fuel spray and promoting atomization.

近年、自動車などの排出ガス規制が強化されており、燃料噴射装置によって噴射される燃料噴霧の形状及び噴射方向について、様々な形状及び方向を創出することが求められるとともに、噴霧の微粒化の促進が求められている。特に燃料噴霧の微粒化については各種の検討がなされており、従来の燃料噴射装置においては、噴射口の弁座側出口端面、もしくは弁体下流側にスロットを弁体軸心に対して放射状に形成しているものがあった。   In recent years, exhaust gas regulations for automobiles and the like have been strengthened, and it has been required to create various shapes and directions of the fuel spray injected by the fuel injection device and promote atomization of the spray. Is required. In particular, various investigations have been made on atomization of fuel spray. In conventional fuel injection devices, slots are formed radially on the valve seat side outlet end face of the injection port or on the downstream side of the valve body with respect to the valve body axis. There was something that was forming.

この燃料噴射装置においては、弁体端面に噴霧が回り込むため、ポペット弁特有の噴霧角が大きい中空円錐形噴霧ではなく、噴霧角が抑制され、かつ空気との混合に適した中実の噴霧が形成される。又噴霧が弁体端面にまで回り込むことにより、単位時間に噴霧が進む距離を抑制するとともに、空気との混合による微粒化を促進するものである（特許文献１参照）。   In this fuel injection device, since the spray circulates to the end face of the valve body, it is not a hollow cone spray having a large spray angle unique to a poppet valve, but a solid spray suitable for mixing with air with a suppressed spray angle. It is formed. Further, when the spray wraps around the end face of the valve body, the distance traveled by the spray per unit time is suppressed and atomization by mixing with air is promoted (see Patent Document 1).

特開平１１−１９３７３４号公報JP 11-193734 A

従来の燃料噴射装置は以上のように構成されており、噴射口部に設けられたスロットが、噴霧形状と噴射方向を独立してコントロールすることは難しいという問題点があった。又弁体が弁座に当接するシート部より下流側にスロットを設けたため、燃料噴射終了後にスロットに燃料が溜まる。そして燃料噴射装置を吸気管噴射用に用いた場合は弁体に付着した燃料が液滴となって落下することにより、空燃比が変動してしまうという問題点もあった。   The conventional fuel injection device is configured as described above, and there is a problem that it is difficult for the slot provided in the injection port to control the spray shape and the injection direction independently. Further, since the slot is provided on the downstream side of the seat portion where the valve body comes into contact with the valve seat, fuel is accumulated in the slot after the fuel injection is completed. When the fuel injection device is used for intake pipe injection, there is a problem that the air-fuel ratio fluctuates due to the fuel adhering to the valve body falling as droplets.

この発明は上記のような課題を解決するためになされたものであり、ガソリンエンジン用燃料噴射装置において、噴射口出口に燃料が付着するのを抑制するとともに、多様な噴霧形状および噴射方向を形成することができ、更に噴霧の微粒化を向上させることのできる燃料噴射装置を提供することを目的とするものである。   The present invention has been made to solve the above-described problems. In a fuel injection device for a gasoline engine, the fuel is prevented from adhering to the outlet of the injection port, and various spray shapes and injection directions are formed. An object of the present invention is to provide a fuel injection device that can improve the atomization of the spray.

この発明に係る燃料噴射装置は、弁座が設けられた弁ボディと、弁座に離接する弁体とを有し、この弁体が下流側へ移動するときに開弁する外開弁方式のものであって、弁体が弁座に当接するシート部より下流側に噴射孔を有するプレートを設けるとともに、プレートと弁体の端面の間に開弁時噴射孔に通ずるキャビティを設けたものである。   The fuel injection device according to the present invention has a valve body provided with a valve seat, and a valve body that is separated from and in contact with the valve seat, and is an outer valve opening type that opens when the valve body moves downstream. The valve body is provided with a plate having an injection hole on the downstream side of the seat portion where the valve body comes into contact with the valve seat, and a cavity is provided between the plate and the end face of the valve body so as to communicate with the injection hole. is there.

この発明に係る燃料噴射装置によれば、弁座が設けられた弁ボディと、弁座に離接する弁体とを有し、この弁体が下流側へ移動するときに開弁する外開弁方式のものであって、弁体が弁座に当接するシート部より下流側に噴射孔を有するプレートを設けるとともに、プレートと弁体の端面の間に開弁時噴射孔に通ずるキャビティを設けたので、様々な噴霧形状及び噴射方向を形成することができるとともに、燃料噴霧の微粒化を促進することができる。更には噴射孔出口に燃料が付着することを抑制することができる。   According to the fuel injection device of the present invention, the valve body provided with the valve seat and the valve body that is separated from and in contact with the valve seat, the outer valve that opens when the valve body moves downstream. In this system, a plate having an injection hole is provided on the downstream side of the seat portion where the valve body abuts the valve seat, and a cavity communicating with the injection hole at the time of valve opening is provided between the plate and the end surface of the valve body. Therefore, various spray shapes and injection directions can be formed, and atomization of fuel spray can be promoted. Furthermore, it is possible to suppress the fuel from adhering to the outlet of the injection hole.

実施の形態１．
以下この発明の一実施形態を図に基づいて説明する。
図１はこの発明の実施の形態１による燃料噴射装置を示す断面図、図２、図３は同じく先端部を示す断面図であり、図２は閉弁状態を示すとともに、図３は開弁状態を示している。
本発明による燃料噴射装置には弁装置１が設けられており、この弁装置１は弁体２と弁ボディ３によって構成されている。 Embodiment 1 FIG.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a fuel injection device according to Embodiment 1 of the present invention, FIGS. 2 and 3 are cross-sectional views showing a tip portion, FIG. 2 shows a valve closing state, and FIG. Indicates the state.
The fuel injection device according to the present invention is provided with a valve device 1, which is composed of a valve body 2 and a valve body 3.

弁体２はガイド部２ａを有しており、ガイド部２ａには２面平面部２ｂが設けられている。そして燃料は弁ボディ３の内径部３ａと弁体２の間の隙間、及び内径部３ａと平面部２ｂの間の隙間を通って流れる。弁体２の先端部には弁体シート部２ｃが設けられ、弁体シート部２ｃと弁ボディ３に設けられた弁座３ｂとはシート部３ｃにおいて接触している。   The valve body 2 has a guide portion 2a, and the guide portion 2a is provided with a two-plane flat portion 2b. The fuel flows through the gap between the inner diameter portion 3a of the valve body 3 and the valve body 2 and the gap between the inner diameter portion 3a and the flat surface portion 2b. A valve body seat portion 2c is provided at the tip of the valve body 2, and the valve body seat portion 2c and the valve seat 3b provided on the valve body 3 are in contact with each other at the seat portion 3c.

スプリング４は弁体２を閉弁方向に付勢するためのものであり、弁体２にはアマチュア５が取り付けられるとともに、コア６がアマチュア５に対向して配置されている。又ボビン７内において電磁コイル８が巻回されることによりソレノイド装置が構成されている。   The spring 4 is for urging the valve body 2 in the valve closing direction. An armature 5 is attached to the valve body 2, and a core 6 is disposed to face the armature 5. A solenoid device is configured by winding an electromagnetic coil 8 in the bobbin 7.

燃料噴射装置の先端部にはプレート９が設けられており、プレート９には弁体端面２ｄと対向する凸部９ａが設けられている。又プレート９には弁装置１の軸心から離れる方向に所定角度傾斜している複数の噴射孔９ｂが設けられている。開弁することにより弁体端面２ｄが凸部９ａと接触し、弁体端面２ｄとプレート９との間にキャビティ１０が形成され、噴射孔９ｂとキャビティ１０とが連通することになる。   A plate 9 is provided at the tip of the fuel injection device, and the plate 9 is provided with a convex portion 9a facing the valve element end surface 2d. The plate 9 is provided with a plurality of injection holes 9b inclined at a predetermined angle in a direction away from the axis of the valve device 1. By opening the valve, the valve body end surface 2d comes into contact with the convex portion 9a, a cavity 10 is formed between the valve body end surface 2d and the plate 9, and the injection hole 9b and the cavity 10 communicate with each other.

以上のように構成された燃料噴射装置においては、電磁コイル８に電流を供給することにより磁気回路が形成され、アマチュア５がコア６に引き付けられることにより弁体２は下流側へ移動し、噴射口９ｂより燃料が内燃機関へ噴射される。弁体２の移動は図３に示すように、弁体端面２ｄが凸部９ａに当接することにより終了する。そして電流を遮断すると、弁体２はスプリング４の復帰力により上流側へ移動し、燃料噴射は終了する。   In the fuel injection device configured as described above, a magnetic circuit is formed by supplying an electric current to the electromagnetic coil 8, and the valve body 2 moves downstream by attracting the armature 5 to the core 6. Fuel is injected from the port 9b into the internal combustion engine. As shown in FIG. 3, the movement of the valve body 2 is terminated when the valve body end surface 2d abuts against the convex portion 9a. When the current is cut off, the valve body 2 moves upstream by the restoring force of the spring 4, and the fuel injection ends.

図４はプレート９部を示す拡大断面図であり、キャビティ１０内において、弁装置１の中心に向かう方向に流れる燃料の流れＰは加速され、更に噴射孔９ｂは弁装置１の軸心から離れる方向に所定角度傾斜しているため、噴射孔入口部９ｃにおいて、燃料流れの剥離が強化されることとなり、燃料噴霧の微粒化が促進される。   FIG. 4 is an enlarged cross-sectional view showing the plate 9 portion. In the cavity 10, the fuel flow P flowing in the direction toward the center of the valve device 1 is accelerated, and the injection hole 9 b is separated from the axis of the valve device 1. Since it is inclined at a predetermined angle in the direction, the separation of the fuel flow is strengthened at the injection hole inlet 9c, and the atomization of the fuel spray is promoted.

以上のように本実施形態においては、プレート９に複数の噴射孔９ｂを設け、キャビティ１０に連通させるように構成したので、様々な噴霧形状及び噴射方向を形成することができるとともに、燃料噴霧の微粒化を促進することができる。更には噴射孔出口に燃料が付着することを抑制することができる。   As described above, in the present embodiment, since a plurality of injection holes 9b are provided in the plate 9 and communicated with the cavity 10, various spray shapes and injection directions can be formed, and fuel spray Atomization can be promoted. Furthermore, it is possible to suppress the fuel from adhering to the outlet of the injection hole.

実施の形態２．
図５はこの発明の実施の形態２による燃料噴射装置の先端部を示す断面図である。
上記実施の形態１においては、プレート９に凸部９ａを設けた場合について説明したが、本実施形態においては、弁体２の先端面に凸部２ｅを設け、キャビティ１０を形成するようにしたものである。
以上のように構成することにより、実施の形態１の場合と同様の動作が行われ、様々な噴霧形状及び噴射方向を形成することができるとともに、燃料噴霧の微粒化を促進することができる。 Embodiment 2. FIG.
FIG. 5 is a cross-sectional view showing a tip portion of a fuel injection device according to Embodiment 2 of the present invention.
In the first embodiment, the case where the projection 9a is provided on the plate 9 has been described. However, in the present embodiment, the projection 2e is provided on the distal end surface of the valve body 2 to form the cavity 10. Is.
By configuring as described above, the same operation as in the first embodiment is performed, and various spray shapes and injection directions can be formed, and atomization of fuel spray can be promoted.

実施の形態３．
本実施形態においては、図３に示すように、開弁時においてシート部３ｃの流路断面積をＳ１、噴射孔９ｂの直上流側であって、キャビティ１０の流路断面積をＳ２、噴射孔９ｂの流路断面積をＳ３としたとき、Ｓ１＞Ｓ２＞Ｓ３の関係を満たすように構成したものである。 Embodiment 3 FIG.
In the present embodiment, as shown in FIG. 3, when the valve is opened, the flow passage cross-sectional area of the seat portion 3c is S1, the flow passage cross-sectional area of the cavity 10 is immediately upstream of the injection hole 9b, and the injection flow is S2. When the channel cross-sectional area of the hole 9b is S3, it is configured to satisfy the relationship of S1>S2> S3.

ポペット弁構造においては、弁体リフト量にばらつきが生じやすいが、この場合弁体リフト量はシート部３ｃの流路断面積Ｓ１に直結する。そして流量特性や噴霧特性をシート部３ｃの流路断面積Ｓ１において発生する圧損に依存させると、弁体リフト量にばらつきが生じた場合、これらの特性にもばらつきが生じてしまうことになる。   In the poppet valve structure, the valve body lift amount is likely to vary. In this case, the valve body lift amount is directly connected to the flow path cross-sectional area S1 of the seat portion 3c. If the flow rate characteristic and the spray characteristic depend on the pressure loss generated in the flow path cross-sectional area S1 of the seat portion 3c, if the valve lift amount varies, these characteristics also vary.

しかし図３に示すように、Ｓ１＞Ｓ２＞Ｓ３の関係を満たすように構成することにより、流量特性や噴霧特性はキャビティ１０の流路断面積Ｓ２及び噴射孔９ｂの流路断面積Ｓ３において発生する圧損に依存することになるので、弁体リフト量にばらつきが生じても、流路断面積Ｓ２及び流路断面積Ｓ３には影響は無く、流量特性や噴霧特性にばらつきが生じにくくなる。   However, as shown in FIG. 3, by configuring so as to satisfy the relationship of S1> S2> S3, the flow rate characteristics and the spray characteristics are generated in the channel cross-sectional area S2 of the cavity 10 and the channel cross-sectional area S3 of the injection hole 9b. Therefore, even if the valve lift amount varies, the flow passage cross-sectional area S2 and the flow passage cross-sectional area S3 are not affected, and the flow characteristics and the spray characteristics are less likely to vary.

即ち流量特性や噴霧特性は噴射孔９ｂの形状及びキャビティ１０の形状に依存するようになる。尚噴射孔９ｂを複数個設けた場合には、噴射孔９ｂの流路断面積Ｓ３はこれら複数個の噴射孔９ｂの総和となる。   That is, the flow rate characteristic and the spray characteristic depend on the shape of the injection hole 9 b and the shape of the cavity 10. When a plurality of injection holes 9b are provided, the flow passage cross-sectional area S3 of the injection holes 9b is the sum of the plurality of injection holes 9b.

実施の形態４．
図６はこの発明の実施の形態４による燃料噴射装置の先端部を示す断面図である。
本実施形態においては、シート部３ｃの下流側であって、弁体シート部２ｃに下流側に向かって縮径するようなテーパ部２ｆを設け、更に噴射孔９ｂを塞がないように、プレート９に対向する弁体端面２ｄを弁体２に設けるようにしたものである。即ち実施の形態２の場合と同様弁体の先端面に凸部を設けるが、凸部の側面を弁装置１の外側から中心に向かって傾斜させるように構成したものである。 Embodiment 4 FIG.
6 is a cross-sectional view showing the tip of a fuel injection device according to Embodiment 4 of the present invention.
In the present embodiment, the plate is provided on the downstream side of the seat portion 3c so that the valve seat portion 2c has a tapered portion 2f whose diameter decreases toward the downstream side, and further, the injection hole 9b is not blocked. A valve body end face 2d opposite to the valve body 9 is provided on the valve body 2. That is, a convex portion is provided on the distal end surface of the valve body as in the second embodiment, but the side surface of the convex portion is inclined from the outside of the valve device 1 toward the center.

以上のように構成することにより、噴射孔９ｂに向かって流れるキャビティ１０内の燃料の流れにおいて、弁装置１の軸心から放射方向に噴射孔９ｂへ流入する燃料の流れＱを抑制できるので、キャビティ１０の外側から中心に向かって流れる燃料の流れＲが強化される。   By configuring as described above, in the fuel flow in the cavity 10 flowing toward the injection hole 9b, the flow Q of fuel flowing into the injection hole 9b in the radial direction from the axial center of the valve device 1 can be suppressed. The fuel flow R flowing from the outside of the cavity 10 toward the center is strengthened.

従って燃料噴霧の微粒化を更に促進することができるようになる。
尚上記説明においては、弁体に設けられた凸部の側面を傾斜させるようにしたものを示したが、プレート９に設けられた凸部の側面を傾斜させるように構成してもよい。 Therefore, atomization of the fuel spray can be further promoted.
In the above description, the side surface of the convex portion provided on the valve body is inclined. However, the side surface of the convex portion provided on the plate 9 may be inclined.

この発明の実施の形態１による燃料噴射装置を示す断面図である。It is sectional drawing which shows the fuel-injection apparatus by Embodiment 1 of this invention. この発明の実施の形態１による燃料噴射装置の先端部を示す断面図である。It is sectional drawing which shows the front-end | tip part of the fuel-injection apparatus by Embodiment 1 of this invention. この発明の実施の形態１による燃料噴射装置の先端部を示す断面図である。It is sectional drawing which shows the front-end | tip part of the fuel-injection apparatus by Embodiment 1 of this invention. プレート部を示す拡大断面図である。It is an expanded sectional view which shows a plate part. この発明の実施の形態２による燃料噴射装置の先端部を示す断面図である。It is sectional drawing which shows the front-end | tip part of the fuel-injection apparatus by Embodiment 2 of this invention. この発明の実施の形態４による燃料噴射装置の先端部を示す断面図である。It is sectional drawing which shows the front-end | tip part of the fuel-injection apparatus by Embodiment 4 of this invention.

符号の説明Explanation of symbols

２ 弁体、２ｅ 凸部、３ 弁ボディ、３ｂ 弁座、９ プレート、９ａ 凸部、
９ｂ 噴射孔、１０ キャビティ。 2 valve body, 2e convex part, 3 valve body, 3b valve seat, 9 plate, 9a convex part,
9b Injection hole, 10 cavity.

Claims (5)

弁座が設けられた弁ボディと、上記弁座に離接する弁体とを有し、この弁体が下流側へ移動するときに開弁する外開弁方式の燃料噴射装置において、上記弁体が上記弁座に当接するシート部より下流側に噴射孔を有するプレートを設けるとともに、上記プレートと上記弁体の端面の間に開弁時上記噴射孔に通ずるキャビティを設けたことを特徴とする燃料噴射装置。 In an outer valve-opening type fuel injection device that has a valve body provided with a valve seat and a valve body that is separated from and in contact with the valve seat and opens when the valve body moves downstream, the valve body Is provided with a plate having an injection hole on the downstream side of the seat portion that contacts the valve seat, and a cavity that communicates with the injection hole when the valve is opened is provided between the plate and the end face of the valve body. Fuel injection device. 上記プレートに凸部を設けることにより、上記キャビティを形成したことを特徴とする請求項１記載の燃料噴射装置。 The fuel injection device according to claim 1, wherein the cavity is formed by providing a convex portion on the plate. 上記弁体の端面に凸部を設けることにより、上記キャビティを形成したことを特徴とする請求項１記載の燃料噴射装置。 The fuel injection device according to claim 1, wherein the cavity is formed by providing a convex portion on an end surface of the valve body. 上記シート部の流路断面積をＳ１、上記キャビティの流路断面積をＳ２、上記噴射孔の流路断面積をＳ３としたとき、Ｓ１＞Ｓ２＞Ｓ３の関係を満たすように構成したことを特徴とする請求項１から請求項３のいずれか１項に記載の燃料噴射装置。 When the flow passage cross-sectional area of the sheet portion is S1, the flow passage cross-sectional area of the cavity is S2, and the flow passage cross-sectional area of the injection hole is S3, it is configured to satisfy the relationship of S1> S2> S3. The fuel injection device according to claim 1, wherein the fuel injection device is a fuel injection device. 上記凸部の側面を傾斜させて構成したことを特徴とする請求項２又は請求項３記載の燃料噴射弁。 4. The fuel injection valve according to claim 2, wherein a side surface of the convex portion is inclined.
JP2005259018A 2005-09-07 2005-09-07 Fuel injection device Expired - Fee Related JP4127703B2 (en)

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Cited By (4)

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JP2010096156A (en) * 2008-10-20 2010-04-30 Honda Motor Co Ltd Fuel injection device
JP2014227934A (en) * 2013-05-23 2014-12-08 三菱電機株式会社 Fuel injection valve
JP2016176475A (en) * 2015-03-20 2016-10-06 エムエーエヌ・ディーゼル・アンド・ターボ・フィリアル・アフ・エムエーエヌ・ディーゼル・アンド・ターボ・エスイー・ティスクランド Fuel valve for injecting fuel to combustion chamber of turbocharging type large-sized two stroke self-ignition internal combustion engine
KR20180062944A (en) * 2016-12-01 2018-06-11 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A fuel valve for injecting gaseous fuel into a combustion chamber of a large two-stroke turbocharged compression-ignition internal combustion engine and method

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KR101405576B1 (en) * 2008-08-12 2014-06-10 현대자동차주식회사 Fuel Injector

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EP0611885B1 (en) * 1993-02-17 1997-06-04 New Sulzer Diesel AG Fuel injector valve for an internal combustion piston engine
JP2001046919A (en) * 1999-08-06 2001-02-20 Denso Corp Fluid injection nozzle
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
JP2010096156A (en) * 2008-10-20 2010-04-30 Honda Motor Co Ltd Fuel injection device
JP2014227934A (en) * 2013-05-23 2014-12-08 三菱電機株式会社 Fuel injection valve
JP2016176475A (en) * 2015-03-20 2016-10-06 エムエーエヌ・ディーゼル・アンド・ターボ・フィリアル・アフ・エムエーエヌ・ディーゼル・アンド・ターボ・エスイー・ティスクランド Fuel valve for injecting fuel to combustion chamber of turbocharging type large-sized two stroke self-ignition internal combustion engine
RU2632360C2 (en) * 2015-03-20 2017-10-04 МАН Дизель унд Турбо, филиал аф МАН Дизель унд Турбо СЕ, Тюскланд Propellant valve for wet fuel injection into compression chamber of two cycle internal combustion engine with boost-pressure charge and autoignition and two cycle internal combustion engine with boost-pressure charge and autoignition comprising noted valve
KR101905649B1 (en) * 2015-03-20 2018-11-28 만 에너지 솔루션즈, 필리알 아프 만 에너지 솔루션즈 에스이, 티스크란드 Fuel valve for injecting fuel into a combustion chamber of a large self-igniting turbocharged two-stroke internal combustion engine
KR20180062944A (en) * 2016-12-01 2018-06-11 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 A fuel valve for injecting gaseous fuel into a combustion chamber of a large two-stroke turbocharged compression-ignition internal combustion engine and method
KR102033173B1 (en) 2016-12-01 2019-10-16 만 에너지 솔루션즈, 필리알 아프 만 에너지 솔루션즈 에스이, 티스크란드 A fuel valve for injecting gaseous fuel into a combustion chamber of a large two-stroke turbocharged compression-ignition internal combustion engine and method

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