JP3332560B2 - Fuel / water injection device for water-injection diesel engine - Google Patents
Fuel / water injection device for water-injection diesel engineInfo
- Publication number
- JP3332560B2 JP3332560B2 JP07249394A JP7249394A JP3332560B2 JP 3332560 B2 JP3332560 B2 JP 3332560B2 JP 07249394 A JP07249394 A JP 07249394A JP 7249394 A JP7249394 A JP 7249394A JP 3332560 B2 JP3332560 B2 JP 3332560B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- water
- needle valve
- annular groove
- injection
- 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
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
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は燃料と水とを単一の噴射
弁からシリンダ内に噴射する水噴射式ディーゼル機関の
燃料・水噴射装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel / water injection device for a water injection type diesel engine for injecting fuel and water from a single injection valve into a cylinder.
【０００２】[0002]
【従来の技術】ディーゼル機関においては、窒素酸化物
( NOx)を低減するため、燃料と水とを単一の噴射弁から
シリンダ内に層状あるいは両者を混合した状態で噴射す
る燃料・水噴射装置が近年採用されつつある。2. Description of the Related Art In diesel engines, nitrogen oxides are used.
In order to reduce (NOx), a fuel / water injection device that injects fuel and water into a cylinder in a stratified or mixed state from a single injection valve has recently been adopted.
【０００３】図２には従来の水噴射式ディーゼル機関の
燃料・水噴射装置の1 例が示されている。図２におい
て、100 は燃料噴射ポンプで、ポンプ本体３、プランジ
ャ４、プランジャバレル５、吐出弁６、調圧逆止弁７等
からなる。FIG. 2 shows an example of a fuel / water injection device of a conventional water injection type diesel engine. In FIG. 2, reference numeral 100 denotes a fuel injection pump, which comprises a pump body 3, a plunger 4, a plunger barrel 5, a discharge valve 6, a pressure control check valve 7, and the like.
【０００４】２００は噴射弁で,本体９,ノズルチップ１
０、噴孔１０ａ，針弁１１、燃料溜り１２,逆止弁１
３、針弁ばね１５、針弁ばね受１４、針弁ばね室１６等
を備えている。針弁１１はノズルチップ１０に摺動自在
に嵌装され,その先端部は燃料溜り１２内に臨ませてあ
る。この針弁１１をその後方から先端に向かって押圧す
る針弁ばね１５は針弁ばね室１６内に収容されている。 [0004] 200 is an injection valve, the main body 9 and the nozzle tip 1
0, injection hole 10a, needle valve 11, fuel reservoir 12, check valve 1
3, a needle valve spring 15, a needle valve spring receiver 14, a needle valve spring chamber 16 and the like. Needle valve 11 slides freely on nozzle tip 10
With its tip facing inside the fuel reservoir 12.
You. This needle valve 11 is pressed from the rear to the tip.
The needle valve spring 15 is accommodated in a needle valve spring chamber 16.
【０００５】１は主燃料タンク、２は燃料供給ポンプ、
209 はポンプ２と燃料噴射ポンプ100 の給油室51とを接
続する給油管、８は燃料噴射ポンプ100 と噴射弁200 と
を接続する噴射管、21は水タンク、20は給水ポンプ、19
は水導入管、17は水注入管、18は水導入管19と水注入管
17との間を開閉する制御弁、22は制御弁18を制御するコ
ントロール装置である。[0005] 1 is a main fuel tank, 2 is a fuel supply pump,
Reference numeral 209 denotes a fuel supply pipe connecting the pump 2 to the fuel supply chamber 51 of the fuel injection pump 100; 8 denotes an injection pipe connecting the fuel injection pump 100 and the injection valve 200; 21 denotes a water tank; 20 denotes a water supply pump;
Is a water inlet pipe, 17 is a water inlet pipe, 18 is a water inlet pipe 19 and a water inlet pipe
A control valve that opens and closes between the control valve 17 and 22 is a control device that controls the control valve 18.
【０００６】しかして、主燃料タンク１内に貯溜された
燃料は燃料供給ポンプ２によって付勢され、給油管209
を通って燃料噴射ポンプ100 の給油室51内に導入され
る。コントロール装置22により制御弁18が開弁せしめら
れると、給水ポンプ20により圧送された水が水導入管19
から水注入管17を経て噴射弁200 内に入り、その水通路
33を経て逆止弁13を押し開き、水通路32を通って燃料溜
り12内に注入される。その後、燃料噴射ポンプ100 のプ
ランジャ４が燃料を加圧すると、燃料が吐出弁６を押し
開けて吐出され、噴射管８を経て噴射弁200 に入り、そ
の燃料通路31を経て燃料溜り12内に達する。[0006] The fuel stored in the main fuel tank 1 is urged by the fuel supply pump 2 and supplied to the fuel supply pipe 209.
Through the fuel injection pump 100 into the fuel supply chamber 51. When the control valve 18 is opened by the control device 22 , the water pumped by the water supply pump 20 is supplied to the water introduction pipe 19.
Through the water injection pipe 17 and into the injection valve 200,
The check valve 13 is pushed open via 33 and is injected into the fuel reservoir 12 through the water passage 32. Thereafter, when the plunger 4 of the fuel injection pump 100 pressurizes the fuel, the fuel is pushed out by opening the discharge valve 6 and discharged, enters the injection valve 200 through the injection pipe 8, and enters the fuel reservoir 12 through the fuel passage 31. Reach.
【０００７】燃料溜り12内の圧力が針弁ばね15の押付
力、即ち、針弁11の開弁圧力よりも高くなると針弁11が
開弁し、燃料溜まり12内の燃料及び水が噴孔10a からシ
リンダ内、即ち、燃焼室400 内に噴射され、ここで燃焼
温度の上昇が抑制されたいわゆる低NOx 燃焼が行われ
る。When the pressure in the fuel reservoir 12 becomes higher than the pressing force of the needle valve spring 15, that is, the valve opening pressure of the needle valve 11, the needle valve 11 is opened, and the fuel and water in the fuel reservoir 12 are discharged from the injection hole. From 10a, the fuel is injected into the cylinder, that is, into the combustion chamber 400, where the so-called low NOx combustion in which the rise in combustion temperature is suppressed is performed.
【０００８】[0008]
【発明が解決しようとする課題】上記従来の装置におい
ては、燃料溜り12内の圧力が高圧になるため、燃料及び
水の一部が針弁11の外周面とノズルチップ10の内周面34
との間隙から漏洩して針弁ばね室16内に流入する。In the above-mentioned conventional apparatus, since the pressure in the fuel reservoir 12 becomes high, a part of the fuel and the water is removed from the outer peripheral surface of the needle valve 11 and the inner peripheral surface 34 of the nozzle tip 10.
And leaks into the needle valve spring chamber 16.
【０００９】そして、時間の経過とともに針弁ばね室16
内の燃料と水とが分離し、分離した水が針弁11の上部、
針弁ばね受14、針弁ばね15等に錆を発生せしめるため、
これらの部材の強度が著しく低下し、破損、機能不良等
の不具合を招くおそれがあった。Then, as time passes, the needle valve spring chamber 16
The fuel and water inside are separated, and the separated water is located above the needle valve 11,
To generate rust on the needle valve spring receiver 14, needle valve spring 15, etc.
The strength of these members was significantly reduced, and there was a risk of causing problems such as breakage and malfunction.
【００１０】本発明の目的とするところは、針弁11とノ
ズルチップ10との間隙から燃料及び水が針弁ばね室16内
に漏洩するのを阻止することにより、針弁11、針弁ばね
受14、針弁ばね15等に錆が発生するのを防止して、信頼
性の高い水噴射式ディーゼル機関を提供することにあ
る。An object of the present invention is to prevent the fuel and water from leaking into the needle valve spring chamber 16 from the gap between the needle valve 11 and the nozzle tip 10 so that the needle valve 11 and the needle valve spring An object of the present invention is to provide a highly reliable water-injection diesel engine by preventing rust from being generated on the bearing 14, the needle valve spring 15, and the like.
【００１１】[0011]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、ノズルチップに摺動自在に嵌装された針弁の先
端部を燃料溜り内に臨ませるとともにこの針弁をその後
方から先端に向かって押圧する針弁ばねを針弁ばね室内
に収容し、上記燃料溜り内の燃料及び水の圧力が所定値
以上に上昇したとき上記針弁が上記針弁ばねの弾発力に
抗して後退することにより上記燃料溜り内の燃料及び水
をシリンダ内に噴射する噴射弁を具えた水噴射式ディー
ゼル機関の燃料・水噴射装置において、上記ノズルチッ
プの上記針弁との摺動面に上記針弁の長手方向に沿って
上記燃料溜り寄りに第１の環状溝を刻設するとともにこ
の第１の環状溝よりも上記針弁ばね室寄りに第２の環状
溝を刻設し、上記第１の環状溝を大気に連通させる通路
及び上記第２の環状溝内に加圧された燃料を供給する油
路を設けたことを特徴とする水噴射式ディーゼル機関の
燃料・水噴射装置にある。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above problems, and its gist is to provide a tip of a needle valve slidably fitted to a nozzle tip.
With the end facing the fuel reservoir,
The needle valve spring that presses from the side toward the tip
And the pressure of fuel and water in the fuel reservoir is
When the needle valve rises above, the needle valve
In fuel and water injection device for water injection diesel engine equipped with injection valve for injecting fuel and water in the fuel reservoir into the cylinder by retraction and anti, sliding between the needle valve of the above Keno Zuruchippu Along the longitudinal direction of the needle valve on the moving surface
Engraved a second annular groove in the first of the needle valve spring chamber nearer the annular groove of this <br/> while engraved first annular groove in the fuel reservoir closer, the first annular in fuel and water injection device for water injection diesel engine, characterized in that a fluid passage for supplying pressurized fuel to the communication is allowed through passage and the second annular groove to the atmosphere grooves.
【００１２】[0012]
【作用】本発明においては、燃料溜りから針弁とノズル
チップとの隙間を通って漏れ出た燃料及び水が第１の環
状溝に達すると、この第１の環状溝が大気に連通してい
るため、この第１の環状溝よりも針弁ばね室側へ漏れ出
難くなる。これに加えて、針弁ばね室寄りに設けられた
第２の環状溝内には加圧油が供給されているので、加圧
油によるシール作用により燃料及び水の漏洩は完全に阻
止される。In the present invention, when the fuel and water leaked from the fuel reservoir through the gap between the needle valve and the nozzle tip reach the first annular groove, the first annular groove communicates with the atmosphere. Therefore, it is less likely to leak to the needle valve spring chamber side than the first annular groove. In addition, since pressurized oil is supplied into the second annular groove provided near the needle valve spring chamber, leakage of fuel and water is completely prevented by the sealing action of the pressurized oil. .
【００１３】また、第２の環状溝に供給される加圧油は
針弁の外周面とノズルチップの内周面の潤滑作用を行う
ので、針弁の摺動運動が円滑化されるとともに針弁の焼
付きが防止される。The pressurized oil supplied to the second annular groove performs a lubricating action on the outer peripheral surface of the needle valve and the inner peripheral surface of the nozzle tip. Seizure of the valve is prevented.
【００１４】[0014]
【実施例】図１には本発明の１実施例に係る水噴射式デ
ィーゼル機関の燃料・水噴射装置が示され、 (A)は構成
図、 (B)は(A) のＢ−Ｂ線に沿う断面図である。FIG. 1 shows a fuel / water injection device for a water-injection diesel engine according to one embodiment of the present invention, wherein (A) is a configuration diagram, and (B) is a BB line of (A). FIG.
【００１５】図１に示すように、噴射弁200 の針弁11の
外周面と摺接するノズルチップ10の内周面34には針弁11
の長手方向に沿って燃料溜り12寄りに第１の環状溝101
が刻設され、また、針弁ばね室16寄りに第２の環状溝20
3 が刻設されている。As shown in FIG. 1, the inner peripheral surface 34 of the nozzle tip 10 which comes into sliding contact with the outer peripheral surface of the needle valve 11 of the injection valve 200 has
A first annular groove 101 near the fuel reservoir 12 along the longitudinal direction of the
And a second annular groove 20 near the needle valve spring chamber 16.
3 is engraved.
【００１６】第１の環状溝101 は、 (B)に示すように、
本体９及びノズルチップ10内に穿設された空気通路102
を介して大気に連通している。また、第２の環状溝203
は本体９及びノズルチップ10内に穿設された油路202に
連通し、この油路202 は給油管209 から分岐された燃料
バイパス管201 を介して燃料供給ポンプ２の吐出口に接
続されている。他の構成は図２に示す従来のものと同様
であり、対応する部材には同じ符号が付されている。The first annular groove 101 has, as shown in FIG.
Air passage 102 formed in body 9 and nozzle tip 10
Is in communication with the atmosphere through Also, the second annular groove 203
Communicates with an oil passage 202 formed in the main body 9 and the nozzle tip 10. The oil passage 202 is connected to a discharge port of the fuel supply pump 2 via a fuel bypass pipe 201 branched from a fuel supply pipe 209. I have. The other configuration is the same as that of the conventional one shown in FIG. 2, and corresponding members are denoted by the same reference numerals.
【００１７】しかして、水噴射式ディーゼル機関の運転
時、燃料噴射ポンプ100 のプランジャ４が燃料を加圧し
ない時期に、コントロール装置22により制御弁18が開弁
せしめられると、給水ポンプ20により圧送された水が水
導入管19、制御弁18、水注入管17を通って噴射弁200 に
入り、その水通路33を経て逆止弁13を押し開き、水通路
32を通って燃料溜り12内に注入される。When the control valve 18 is opened by the control device 22 at the time when the plunger 4 of the fuel injection pump 100 does not pressurize the fuel during the operation of the water-injection diesel engine, the water is supplied by the water supply pump 20. The discharged water enters the injection valve 200 through the water introduction pipe 19, the control valve 18, and the water injection pipe 17, and pushes the check valve 13 through the water passage 33 to open the water passage.
It is injected into the fuel reservoir 12 through 32.
【００１８】その後、燃料噴射ポンプ100 のプランジャ
４が燃料を加圧すると、燃料が噴射管８を経て噴射弁20
0 に入り、その燃料通路31を経て燃料溜り12に達する。
燃料溜り12内の圧力が針弁ばね15の押付力よりも高くな
ると、針弁11が開弁し、燃料溜まり12内の燃料及び水が
噴孔10a から燃焼室400 内に噴射される。Thereafter, when the plunger 4 of the fuel injection pump 100 pressurizes the fuel, the fuel flows through the injection pipe 8 and the injection valve 20.
0, and reaches the fuel reservoir 12 via the fuel passage 31.
When the pressure in the fuel reservoir 12 becomes higher than the pressing force of the needle valve spring 15, the needle valve 11 opens, and the fuel and water in the fuel reservoir 12 are injected into the combustion chamber 400 from the injection hole 10a.
【００１９】燃料溜り12内に燃料と水が充満すると、そ
の一部が針弁11の外周面とノズルチップ10の内周面34と
の間隙を通って上方、即ち、針弁ばね室16側に漏れ出
す。しかしながら、この漏洩液体は第１の環状溝101 が
空気通路102 を介して大気に開放されているので、空気
通路102 を経て外部へ放出せしめられる。When the fuel reservoir 12 is filled with fuel and water, a part of the fuel reservoir 12 passes upward through the gap between the outer peripheral surface of the needle valve 11 and the inner peripheral surface 34 of the nozzle tip 10, that is, the needle valve spring chamber 16 side. Leaks out. However, since the first annular groove 101 is open to the atmosphere through the air passage 102, the leaked liquid is discharged outside through the air passage 102.
【００２０】さらに、第２の環状溝203 内には加圧され
た燃料が供給されているので、この加圧油によるシール
作用により漏洩液体が針弁ばね室16内に入るのを阻止さ
れる。Further, since pressurized fuel is supplied into the second annular groove 203, leaking liquid is prevented from entering the needle valve spring chamber 16 by the sealing action of the pressurized oil. .
【００２１】また、第２の環状溝203 内の加圧油によ
り、針弁11の外周面及びノズルチップ10の内周面34が潤
滑されるので、針弁11の作動が円滑化され、針弁11の焼
付きも防止される。Further, since the outer peripheral surface of the needle valve 11 and the inner peripheral surface 34 of the nozzle tip 10 are lubricated by the pressurized oil in the second annular groove 203, the operation of the needle valve 11 is smoothed, and Seizure of the valve 11 is also prevented.
【００２２】さらに、第２の環状溝203 から針弁11の外
周面に滲み出た加圧油は第１の環状溝101 に達すると、
この溝101 内に残存している燃料及び水を空気通路102
へと押し出す。Further, the pressurized oil that has oozed out of the outer peripheral surface of the needle valve 11 from the second annular groove 203 reaches the first annular groove 101.
The fuel and water remaining in this groove 101 are
Extrude to
【００２３】尚,上記実施例においては,燃料と水とを別
系統の供給系で噴射弁２００に供給しているが,燃料と
水とを乳状に混合したいわゆるエマルジョン燃料として
噴射弁２００に供給してもよい。さらに,第２の環状溝
２０３への加圧油は独立した油供給系によって供給して
も良い。In the above embodiment, the fuel and water are supplied to the injection valve 200 by a separate supply system. However, the fuel and water are supplied to the injection valve 200 as a so-called emulsion fuel in which the fuel and water are mixed in a milky state. May be. Further, the pressurized oil to the second annular groove 203 is supplied by an independent oil supply system.
Also not good.
【００２４】[0024]
【発明の効果】本発明によれば、ノズルチップの針弁と
の摺動面に針弁の長手方向に沿って燃料溜り寄りに第１
の環状溝を刻設するとともにこの第１の環状溝よりも針
弁ばね室寄りに第２の環状溝を刻設し、第１の環状溝を
大気に連通させる通路及び第２の環状溝内に加圧された
燃料を供給する油路を設けたため、水及び燃料が針弁と
ノズルチップとの間隙を経て針弁ばね室に漏洩するのを
完全に阻止することができる。According to the present invention, the needle valve of the nozzle tip is
The first fuel reservoir closer along the sliding surface in the longitudinal direction of the needle valve of the
Of the first annular groove and the needle
A second annular groove is engraved near the valve spring chamber , and the first annular groove is formed.
Pressurized in the passage communicating with the atmosphere and the second annular groove
Since the oil passage for supplying fuel is provided, it is possible to completely prevent water and fuel from leaking into the needle valve spring chamber via the gap between the needle valve and the nozzle tip.
【００２５】これにより針弁の上部、針弁ばね室内に収
納される針弁ばね、針弁ばね受等の部材に錆が発生する
のを阻止しうるので、これらの部材の強度低下を防止す
ることができ、機関の信頼性を向上しうる。As a result, it is possible to prevent rust from being generated in the upper portion of the needle valve, the needle valve spring accommodated in the needle valve spring chamber, the needle valve spring receiver, and the like, thereby preventing the strength of these members from decreasing. And improve the reliability of the institution.
【００２６】また、第２の環状溝に供給される加圧油が
針弁の外周面とノズルチップの内周面との摺動面へ滲み
出し、これら摺動面の潤滑性の向上にも寄与することが
できる。Also, the pressurized oil supplied to the second annular groove oozes out on the sliding surfaces between the outer peripheral surface of the needle valve and the inner peripheral surface of the nozzle tip, and also improves the lubrication of these sliding surfaces. Can contribute.
【図１】本発明の実施例に係わる水噴射式ディーゼル機
関の燃料・水噴射装置を示し、(A)は構成図、 (B)は
(A)のＢ−Ｂ線に沿う断面図である。1 shows a fuel / water injection device of a water injection type diesel engine according to an embodiment of the present invention, (A) is a configuration diagram, and (B) is
It is sectional drawing which follows the BB line of (A).
【図２】従来の水噴射式ディーゼル機関の燃料・水噴射
装置を示す構成図である。FIG. 2 is a configuration diagram illustrating a fuel / water injection device of a conventional water injection type diesel engine.
100 燃料噴射ポンプ 200 噴射弁 ９ 本体 10 ノズルチップ 10a 噴孔 11 針弁 12 燃料溜り 14 針弁ばね受 15 針弁ばね 16 針弁ばね室 101 第１の環状溝 203 第２の環状溝102 通路 201 燃料バイパス管202 油路 100 fuel injection pump 200 injection valve 9 body 10 nozzle tip 10a injection hole 11 needle valve 12 the fuel reservoir 14 needle valve spring bearing 15 needle valve spring 16 needle valve spring chamber 101 a first annular groove 203 the second annular groove 102 copies path 201 Fuel bypass pipe 202 Oil passage
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ０２Ｍ 25/02 Ｈ (56)参考文献 特開 平５−79420（ＪＰ，Ａ) 実開 平３−83371（ＪＰ，Ｕ) 実開 昭55−12082（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F02M 25/022 F02B 47/02 F02M 43/04 F02M 61/16 ────────────────────────────────────────────────── (5) Continuation of the front page (51) Int.Cl. 7 Identification code FI F02M 25/02 H (56) References JP-A-5-79420 (JP, A) JP-A-3-83371 (JP, U) 55-12282 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F02M 25/022 F02B 47/02 F02M 43/04 F02M 61/16
Claims (1)
弁の先端部を燃料溜り内に臨ませるとともにこの針弁を
その後方から先端に向かって押圧する針弁ばねを針弁ば
ね室内に収容し、上記燃料溜り内の燃料及び水の圧力が
所定値以上に上昇したとき上記針弁が上記針弁ばねの弾
発力に抗して後退することにより上記燃料溜り内の燃料
及び水をシリンダ内に噴射する噴射弁を具えた水噴射式
ディーゼル機関の燃料・水噴射装置において、上記ノズ
ルチップの上記針弁との摺動面に上記針弁の長手方向に
沿って上記燃料溜り寄りに第１の環状溝を刻設するとと
もにこの第１の環状溝よりも上記針弁ばね室寄りに第２
の環状溝を刻設し、上記第１の環状溝を大気に連通させ
る通路及び上記第２の環状溝内に加圧された燃料を供給
する油路を設けたことを特徴とする水噴射式ディーゼル
機関の燃料・水噴射装置。1. A needle slidably fitted on a nozzle tip.
With the tip of the valve facing the fuel reservoir,
Needle valve spring that presses toward the tip from the rear
The fuel and water in the fuel reservoir are
When the needle valve spring rises above a predetermined value, the needle valve spring
The fuel in the above-mentioned fuel pool
And in fuel and water injection device of water equipped with injection valve for injecting into the cylinder water injection diesel engine, longitudinal of the needle valve on the sliding surface between the needle valve of the upper Kino's <br/> Ruchippu When engraved first annular groove in the fuel reservoir closer along the direction DOO
Moni second in the needle valve spring chamber nearer the first annular groove
Engraved the annular groove, the first annular groove is communicated with the atmosphere
That through passage and the second fuel, water injection system of water injection diesel engine, characterized in that a fluid passage for supplying pressurized fuel into the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07249394A JP3332560B2 (en) | 1994-03-17 | 1994-03-17 | Fuel / water injection device for water-injection diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07249394A JP3332560B2 (en) | 1994-03-17 | 1994-03-17 | Fuel / water injection device for water-injection diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07259652A JPH07259652A (en) | 1995-10-09 |
| JP3332560B2 true JP3332560B2 (en) | 2002-10-07 |
Family
ID=13490913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07249394A Expired - Lifetime JP3332560B2 (en) | 1994-03-17 | 1994-03-17 | Fuel / water injection device for water-injection diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3332560B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100482060B1 (en) * | 2002-01-29 | 2005-04-13 | 현대자동차주식회사 | A water injection device of an engine |
| CN109869252A (en) * | 2019-03-15 | 2019-06-11 | 江苏大学 | A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine |
-
1994
- 1994-03-17 JP JP07249394A patent/JP3332560B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07259652A (en) | 1995-10-09 |
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