JPH0686847B2 - Water injection device for internal combustion engine - Google Patents
Water injection device for internal combustion engineInfo
- Publication number
- JPH0686847B2 JPH0686847B2 JP2192440A JP19244090A JPH0686847B2 JP H0686847 B2 JPH0686847 B2 JP H0686847B2 JP 2192440 A JP2192440 A JP 2192440A JP 19244090 A JP19244090 A JP 19244090A JP H0686847 B2 JPH0686847 B2 JP H0686847B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- piston
- chamber
- cylinder
- water 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/03—Adding water into the cylinder or the pre-combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
- F02M25/0225—Water atomisers or mixers, e.g. using ultrasonic waves
-
- 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)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、NOxを低減させるための内燃機関の水噴射装
置に関する。Description: TECHNICAL FIELD The present invention relates to a water injection device for an internal combustion engine for reducing NOx.
［従来の技術］ 従来、内燃機関とくにディーゼル機関において、水を吸
気管を介して或いは直接燃焼室に噴射し、水の蒸発によ
りリンダ内燃焼温度を低下させ、また、水蒸気による吸
気の希釈により、局部的に酸素不足の状態を生じせし
め、NOxの低減を図る技術が知られている（例えば、実
開昭58−139566号公報、実開昭60−84755号公報、実開
昭63−2855号公報、特開昭60−73036号公報参照）。[Prior Art] Conventionally, in an internal combustion engine, especially a diesel engine, water is injected into a combustion chamber through an intake pipe or directly to lower the combustion temperature in the Linda by evaporation of water, and by dilution of intake air with steam, Techniques for locally reducing oxygen and causing NOx reduction are known (for example, JP 58-139566 A, JP 60-84755 A, JP 63-2855 A). Japanese Patent Laid-Open Publication No. 60-73036).
［発明が解決しようとする課題］ しかしながら、上記従来の技術においては、負荷の変化
に応じた水噴射量の制御が困難であるという問題を有し
ている。また、エンジンおよび水噴射ノズルにおける錆
の発生や水の凍結により、耐久性が低下するとともに、
水によりエンジンオイルが希釈されるという問題点を有
している。[Problems to be Solved by the Invention] However, the above-mentioned conventional technique has a problem that it is difficult to control the water injection amount according to a change in load. In addition, the durability of the engine and the water injection nozzle decreases due to rusting and water freezing.
There is a problem that the engine oil is diluted with water.
本発明は上記問題を解決するものであって、シリンダ内
圧力（温度）が所定値以上のときのみシリンダ内に水を
噴射し、必要なときのみ燃焼温度を低下させてNOxを低
減させることができ、エンジンの錆の発生およびエンジ
ンオイルの希釈を防止することができる内燃機関の水噴
射装置を提供することを目的とする。The present invention solves the above-mentioned problem, and it is possible to inject water into the cylinder only when the pressure (temperature) in the cylinder is equal to or higher than a predetermined value, and lower the combustion temperature only when necessary to reduce NOx. An object of the present invention is to provide a water injection device for an internal combustion engine that can prevent rusting of an engine and dilution of engine oil.
［課題を解決するための手段］ そのために本発明の内燃機関の水噴射装置は、シリンダ
ヘッド５内に形成される水供給路16、水加圧室18および
ピストン室19と、水加圧室18の水供給側に設けられる逆
止弁23と、前記水加圧室18とピストン室19内に摺動自在
に嵌合される水加圧用ピストン24と、前記水加圧室18内
の水をシリンダ３内に噴射可能にする水噴射ノズル装置
13とを有し、前記水加圧用ピストン24は、水加圧室18側
端の受圧面積よりもシリンダ３側端の受圧面積が大にな
るように形成し、シリンダ内圧力が所定値以上のときに
水加圧用ピストン24を作動させることを特徴とする。[Means for Solving the Problems] Therefore, the water injection device for an internal combustion engine according to the present invention includes a water supply passage 16, a water pressurizing chamber 18, a piston chamber 19, and a water pressurizing chamber that are formed in the cylinder head 5. A check valve 23 provided on the water supply side of 18, a water pressurizing piston 24 slidably fitted in the water pressurizing chamber 18 and the piston chamber 19, and water in the water pressurizing chamber 18. Water injection nozzle device that enables water to be injected into the cylinder 3
13, the water pressurizing piston 24 is formed so that the pressure receiving area of the cylinder 3 side end is larger than the pressure receiving area of the water pressurizing chamber 18 side end, and the cylinder internal pressure is not less than a predetermined value. The feature is that the water pressurizing piston 24 is sometimes operated.
なお、上記構成に付加した信号した番号は、理解を容易
にするために図面と対比させるためのもので、これによ
り本発明の構成が何ら限定されるものではない。It should be noted that the signal numbers added to the above configuration are for comparison with the drawings for easy understanding, and thus the configuration of the present invention is not limited at all.
［作用］ 本発明においては例えば第１図に示すように、水加圧室
18内に水が供給されている状態でピストン１が上昇しシ
リンダ３圧力が所定値以上になると、水加圧装置12内の
水加圧用ピストン24がスプリング25に打ち勝って上昇す
るため、水加圧室18の水圧により逆止弁23は閉じ、加圧
された水は水供給路17から水噴射ノズル装置13の水通路
26を経て水噴射ノズル27aからシリンダ３内の燃焼室６
内に噴射される。[Operation] In the present invention, for example, as shown in FIG.
When the piston 1 rises and the pressure in the cylinder 3 exceeds a predetermined value while water is being supplied to the inside 18, the water pressurizing piston 24 in the water pressurizing device 12 overcomes the spring 25 and ascends. The check valve 23 is closed by the water pressure of the pressure chamber 18, and the pressurized water is supplied from the water supply passage 17 to the water passage of the water injection nozzle device 13.
26 through the water injection nozzle 27a to the combustion chamber 6 in the cylinder 3.
Is injected into.
［実施例］ 以下、本発明の実施例を図面を参照しつつ説明する。第
１図は本発明に係わる内燃機関の水噴射装置の１実施例
を示す断面図である。Embodiments Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of a water injection device for an internal combustion engine according to the present invention.
第１図において、１はピストン、２はピストンリング、
３はシリンダ、４はガスケット、５はシリンダヘッドを
示し、ピストン１の頂部には燃焼室６が形成され、シリ
ンダヘッド５には、燃焼噴射弁７および水噴射装置９が
取付けられる。In FIG. 1, 1 is a piston, 2 is a piston ring,
3 is a cylinder, 4 is a gasket, 5 is a cylinder head, a combustion chamber 6 is formed at the top of the piston 1, and a combustion injection valve 7 and a water injection device 9 are attached to the cylinder head 5.
水噴射装置９は、水タンク10、給水ポンプ11、水加圧装
置12および水噴射ノズル装置13からなり、配管14、15に
より連結されている。The water injection device 9 includes a water tank 10, a water supply pump 11, a water pressurizing device 12, and a water injection nozzle device 13, which are connected by pipes 14 and 15.
シリンダヘッド５内には、水供給路16、17水加圧室18、
ピストン室19および排気路20が形成され、水加圧室18の
上部には、弁座21が固定されるとともに、該弁座21にス
プリング22を介して逆止弁23が取付けられる。また、前
記水加圧室18とピストン室19内には、水加圧用ピストン
24が摺動自在に嵌合され、スプリング25によりシリンダ
３側に付勢されるとともに、水加圧用ピストン24のシリ
ンダ３側壁は、シリンダヘッド５に支持されている。該
水加圧用ピストン24は、水加圧室18側端の受圧面積より
もシリンダ３側端の受圧面積が大になるように形成され
ている。In the cylinder head 5, water supply channels 16, 17 water pressurizing chamber 18,
A piston chamber 19 and an exhaust passage 20 are formed, and a valve seat 21 is fixed to the upper portion of the water pressurizing chamber 18, and a check valve 23 is attached to the valve seat 21 via a spring 22. Further, in the water pressurizing chamber 18 and the piston chamber 19, a water pressurizing piston is provided.
24 is slidably fitted and urged toward the cylinder 3 side by the spring 25, and the side wall of the cylinder 3 of the water pressurizing piston 24 is supported by the cylinder head 5. The water pressurizing piston 24 is formed such that the pressure receiving area on the cylinder 3 side end is larger than the pressure receiving area on the water pressurizing chamber 18 side end.
前記したスプリング25のばね力は、シリンダ３内の圧力
が所定値に達すると、すなわちシリンダ３内圧力を検知
して、水加圧用ピストン24が上昇するように設定する。The spring force of the spring 25 is set so that the water pressurizing piston 24 rises when the pressure in the cylinder 3 reaches a predetermined value, that is, the pressure in the cylinder 3 is detected.
水噴射ノズル装置13は、中空シリンダ25と、該シリンダ
25内に形成される水通路26と、中空シリンダ25内に摺動
可能に設けられるスプール27と、該スプール27の先端側
に形成される水噴射ノズル27aとを有し、水供給路17か
ら中空シリンダ25内の水通路26内に水が供給されると、
スプール27が摺動し水噴射ノズル27aから水が燃焼室６
内に噴射するように構成している。The water injection nozzle device 13 includes a hollow cylinder 25 and the cylinder.
A water passage 26 formed in the hollow cylinder 25, a spool 27 slidably provided in the hollow cylinder 25, and a water injection nozzle 27a formed at the tip of the spool 27. When water is supplied into the water passage 26 in the hollow cylinder 25,
The spool 27 slides and water is ejected from the water injection nozzle 27a into the combustion chamber 6
It is configured to inject inside.
第２図は燃焼室上部に配置される構成部材の模式図を示
し、燃料噴射弁７の燃料噴射ノズル7aは、燃焼室６の中
心部に対向して配置されるとともに、該噴射ノズル7aと
離れた位置に水噴射装置９の水噴射ノズル27aおよび水
加圧用ピストン24が配置されている。なお、28は排気
弁、29は吸気弁の位置を示している。FIG. 2 shows a schematic view of the constituent members arranged in the upper part of the combustion chamber. The fuel injection nozzle 7a of the fuel injection valve 7 is arranged so as to face the center of the combustion chamber 6, and the injection nozzle 7a The water injection nozzle 27a of the water injection device 9 and the water pressurizing piston 24 are arranged at distant positions. Incidentally, 28 indicates the position of the exhaust valve, and 29 indicates the position of the intake valve.
上記構成からなる本発明の作用について説明する。The operation of the present invention having the above configuration will be described.
水供給ポンプ11により、水タンク10の水は、配管14、水
供給路16、逆止弁23を経て水加圧室18内に供給されてい
る。この状態でピストン１が上昇しシリンダ３圧力が所
定値以上になると、水加圧装置12内の水加圧用ピストン
24がスプリング25に打ち勝って上昇する。このとき、ピ
ストン室19のエアは排気路20から排出される。その結
果、水加圧室18の水圧により逆止弁23は閉じ、加圧され
た水は水供給路17から水噴射ノズル装置13の水通路26を
経て水噴射ノズル27aからシリンダ３内の燃焼室６内に
噴射される。余った水は水噴射ノズル装置13の上部から
配管15を経て水タンク10に戻る。By the water supply pump 11, the water in the water tank 10 is supplied into the water pressurizing chamber 18 through the pipe 14, the water supply passage 16, and the check valve 23. In this state, when the piston 1 rises and the pressure of the cylinder 3 exceeds a predetermined value, the water pressurizing piston in the water pressurizing device 12
24 overcomes spring 25 and rises. At this time, the air in the piston chamber 19 is discharged from the exhaust passage 20. As a result, the check valve 23 is closed by the water pressure in the water pressurizing chamber 18, and the pressurized water is burned in the cylinder 3 from the water injection nozzle 27a through the water passage 26 of the water injection nozzle device 13 from the water supply passage 17. It is injected into the chamber 6. The excess water returns from the upper part of the water injection nozzle device 13 to the water tank 10 through the pipe 15.
第３図は本発明の他の実施例を示す内燃機関の一部断面
図である。なお、第１図の実施例と同一の構成について
は同一番号を付けて説明を省略する。FIG. 3 is a partial sectional view of an internal combustion engine showing another embodiment of the present invention. The same components as those of the embodiment shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
本実施例においては、第１図の水加圧装置12と水噴射ノ
ズル装置13を一体に形成した例を示している。In this embodiment, an example in which the water pressurizing device 12 and the water jet nozzle device 13 of FIG. 1 are integrally formed is shown.
すなわち、水加圧ピストン24の先端に水噴射ノズル27a
を形成し、水加圧用ピストン24内には、スプリング30に
より付勢されるスプール27を設けると共に、水加圧用ピ
ストン24内に水加圧室18と水噴射ノズル間27aを連通さ
せる水通路26を形成している。水加圧用ピストン24とシ
リンダヘッド５の間には、Ｏリング33が配置されてい
る。また、スプリング30が配設されている室31は、通路
32、配管15を経て水タンク10に接続されている。That is, the water injection nozzle 27a is attached to the tip of the water pressurizing piston 24.
And a spool 27 biased by a spring 30 is provided in the water pressurizing piston 24, and a water passage 26 for connecting the water pressurizing chamber 18 and the water injection nozzle 27a in the water pressurizing piston 24. Is formed. An O-ring 33 is arranged between the water pressurizing piston 24 and the cylinder head 5. In addition, the chamber 31 in which the spring 30 is arranged has a passage
It is connected to the water tank 10 via a pipe 32 and a pipe 15.
［発明の効果］ 以上のように本発明によれば、シリンダ内圧力（温度）
が所定値以上のときのみシリンダ内に水を噴射し、必要
なときのみ燃焼温度を低下させてNOxを低減させるよう
にするため、エンジンの錆の発生およびエンジンオイル
の希釈を防止することができる。[Effects of the Invention] As described above, according to the present invention, the cylinder internal pressure (temperature)
Is injected into the cylinder only when is equal to or higher than a predetermined value, and the combustion temperature is lowered only when necessary to reduce NOx, so engine rust and engine oil dilution can be prevented. .
第１図は本発明に係わる内燃機関の水噴射装置の１実施
例を示す断面図、第２図は燃焼室上部に配置される構成
部材の模式図、第３図は本発明の他の実施例を示す内燃
機関の一部断面図である。 ３……シリンダ、５……シリンダヘッド、13……水噴射
ノズル装置、16……水供給路、18……水加圧室、19……
ピストン室、23……逆止弁、24……水加圧用ピストン。FIG. 1 is a sectional view showing an embodiment of a water injection device for an internal combustion engine according to the present invention, FIG. 2 is a schematic view of constituent members arranged in an upper portion of a combustion chamber, and FIG. 3 is another embodiment of the present invention. It is a partial cross-sectional view of an internal combustion engine showing an example. 3 ... Cylinder, 5 ... Cylinder head, 13 ... Water injection nozzle device, 16 ... Water supply path, 18 ... Water pressurizing chamber, 19 ...
Piston chamber, 23 …… Check valve, 24 …… Piston for water pressurization.
Claims (2)
水加圧室およびピストン室と、前記水加圧室の水供給側
に設けられる逆止弁と、前記水加圧室とピストン室内に
摺動自在に嵌合される水加圧用ピストンと、前記水加圧
室内の水をシリンダ内に噴射可能にする水噴射ノズル装
置とを有し、前記水加圧用ピストンは、前記水加圧室側
端の受圧面積よりもシリンダ側端の受圧面積が大になる
ように形成し、シリンダ内圧力が所定値以上のときに水
加圧用ピストンを作動させることを特徴とする内燃機関
の水噴射装置。1. A water supply passage formed in a cylinder head,
A water pressurizing chamber and a piston chamber; a check valve provided on the water supply side of the water pressurizing chamber; a water pressurizing piston slidably fitted in the water pressurizing chamber and the piston chamber; A water injection nozzle device capable of injecting water in the water pressurizing chamber into the cylinder, wherein the water pressurizing piston has a pressure receiving area at the cylinder side end larger than a pressure receiving area at the water pressurizing chamber side end. A water injection device for an internal combustion engine, characterized in that the water pressurizing piston is operated when the cylinder internal pressure is equal to or higher than a predetermined value.
内に設けることを特徴とする請求項第１項記載の内燃機
関の水噴射装置。2. The water injection device for an internal combustion engine according to claim 1, wherein the water injection nozzle device is provided in a water pressurizing piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2192440A JPH0686847B2 (en) | 1990-07-20 | 1990-07-20 | Water injection device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2192440A JPH0686847B2 (en) | 1990-07-20 | 1990-07-20 | Water injection device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0481556A JPH0481556A (en) | 1992-03-16 |
| JPH0686847B2 true JPH0686847B2 (en) | 1994-11-02 |
Family
ID=16291342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2192440A Expired - Lifetime JPH0686847B2 (en) | 1990-07-20 | 1990-07-20 | Water injection device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686847B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016200237B4 (en) | 2016-01-12 | 2022-01-20 | Ford Global Technologies, Llc | Direct-injection supercharged internal combustion engine with water injection and method for operating such an internal combustion engine |
| EP3408529B1 (en) * | 2016-01-29 | 2020-03-04 | Wärtsilä Finland Oy | Water injector |
| DE102016205145A1 (en) * | 2016-03-29 | 2017-10-05 | Robert Bosch Gmbh | Water injection device of an internal combustion engine of a vehicle |
| US9945310B1 (en) * | 2016-12-19 | 2018-04-17 | Ford Global Technologies, Llc | Methods and system for adjusting engine water injection |
-
1990
- 1990-07-20 JP JP2192440A patent/JPH0686847B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0481556A (en) | 1992-03-16 |
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