JPH0119062B2 - - Google Patents
Info
- Publication number
- JPH0119062B2 JPH0119062B2 JP57179880A JP17988082A JPH0119062B2 JP H0119062 B2 JPH0119062 B2 JP H0119062B2 JP 57179880 A JP57179880 A JP 57179880A JP 17988082 A JP17988082 A JP 17988082A JP H0119062 B2 JPH0119062 B2 JP H0119062B2
- Authority
- JP
- Japan
- Prior art keywords
- spray
- combustion chamber
- nozzle
- combustion
- fuel 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 34
- 239000000446 fuel Substances 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 239000007921 spray Substances 0.000 description 52
- 238000010586 diagram Methods 0.000 description 6
- 230000035515 penetration Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1846—Dimensional characteristics of discharge orifices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【発明の詳細な説明】
本発明はデイーゼル機関、特に側方噴射式（中
央噴射に対して）デイーゼル機関の燃料噴射弁に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection valve for a diesel engine, in particular a side-injection (vs. central injection) diesel engine.
従来のこの種機関の燃焼室を第１図に示す。図
において、０１は燃焼室で、シリンダヘツド０１
ａの内面とシリンダ０１ｂの内周面及びピストン
０２の頂面で囲まれた空間である。０３は排気
弁、０４は燃料噴射弁、０５は燃料噴霧を示す。
第２図は第１図の−矢視断面図で、第１図の
噴霧０５は複数個の噴霧０６，７０，０８で形成
されている。第３図は上記燃料噴射弁０４の先端
部の噴口を示す説明図で、噴口０９は燃焼室外周
壁に近い噴霧０６を形成し、噴口１１は燃焼室中
央側に噴霧０８を形成し、噴口１０は上記噴口０
９，１１の中間に噴霧０７を形成する。 Figure 1 shows the combustion chamber of a conventional engine of this type. In the figure, 01 is the combustion chamber, and the cylinder head 01
This is a space surrounded by the inner surface of a, the inner peripheral surface of the cylinder 01b, and the top surface of the piston 02. 03 indicates an exhaust valve, 04 indicates a fuel injection valve, and 05 indicates a fuel spray.
FIG. 2 is a sectional view taken along the - arrow in FIG. 1, and the spray 05 in FIG. 1 is formed by a plurality of sprays 06, 70, and 08. FIG. 3 is an explanatory diagram showing the nozzle at the tip of the fuel injection valve 04. The nozzle 09 forms the spray 06 near the outer peripheral wall of the combustion chamber, the nozzle 11 forms the spray 08 at the center of the combustion chamber, and the nozzle 10 forms the spray 08 at the center of the combustion chamber. is the above spout 0
Spray 07 is formed between 9 and 11.
上記構成において、ピストン０２の上昇により
燃焼室０１内の空気は圧縮され高温、高圧とな
り、上死点近傍で燃料噴射弁０４より燃料が噴射
されて、第２図に３噴口の場合を示すように燃料
噴霧０６〜０８を形成する。これらの噴霧はでき
るだけ燃焼室内の全領域の空気を利用できるよう
に形成され、さらに比較的強い渦流により燃料と
空気の混合が促進されるため、空気利用率、燃焼
効率の高い燃焼が行われる。 In the above configuration, as the piston 02 rises, the air in the combustion chamber 01 is compressed to high temperature and high pressure, and fuel is injected from the fuel injection valve 04 near top dead center, as shown in FIG. 2 for the case of three injection ports. Fuel sprays 06 to 08 are formed. These sprays are formed to utilize as much air as possible in the entire area within the combustion chamber, and the relatively strong vortex flow promotes mixing of fuel and air, resulting in combustion with high air utilization and combustion efficiency.
しかし上記のものには次の欠点がある。 However, the above method has the following drawbacks.
第２図に示すように、噴射された燃料は空気渦
流Ｓにより曲げられながら火炎となつて発達す
る。このとき、噴霧と渦流の相体速度の差及び渦
流の上流、下流の位置の相違により、高気渦流の
影響は内側の噴霧０８に強く、外側の噴霧０６に
弱く働く。ところが、噴霧の貫徹力はそれぞれの
噴霧とも同等であるため内側の噴霧０８は大きく
曲げられ外側の噴霧０６は曲がる量が少ない。従
つて、全噴霧が一かたまりの形で発達し、この領
域では噴霧あるいは火炎同志が干渉し、燃焼が阻
害される。さらに、内側の噴霧が大きく外へ曲げ
られるため、燃焼室中央部に空気の未利用領域が
存在し空気利用率が低下する。さらに、全燃料の
噴霧が同時に向い側の燃焼室壁に到達するため、
この部分で空気不足の状態となり、燃焼が阻害さ
れる。 As shown in FIG. 2, the injected fuel develops into a flame while being bent by the air vortex S. At this time, due to the difference in phase velocity between the spray and the vortex and the difference in the upstream and downstream positions of the vortex, the influence of the high air vortex is strong on the inner spray 08 and weaker on the outer spray 06. However, since the penetration force of each spray is the same, the inner spray 08 is largely bent, and the outer spray 06 is bent less. Therefore, the entire spray develops in the form of a mass, and in this region the sprays or flames interfere with each other and combustion is inhibited. Furthermore, since the inner spray is largely bent outward, an unused area of air exists in the center of the combustion chamber, reducing the air utilization rate. Furthermore, all the fuel spray reaches the opposite combustion chamber wall at the same time.
There is a lack of air in this area, which inhibits combustion.
これらにより従来のシステムでは燃焼室内への
空間的、時間的な燃料配分が適当でなく、空気利
用率、燃焼効率が不十分となる。 As a result, in conventional systems, spatial and temporal fuel distribution within the combustion chamber is inappropriate, resulting in insufficient air utilization and combustion efficiency.
本発明の目的は上記の点に着目し、側方噴射式
デイーゼル機関において、燃焼室内への空間的、
時間的な燃料の分散を良好にし、空気利用率、燃
焼効率の高い燃焼を行わしめることのできる燃料
噴射弁を提供することであり、その特徴とすると
ころは、複数個の噴口のうち燃焼室外周部に噴霧
を形成する外側の噴口、即ち噴口の軸心線が燃焼
室外周部へ指向する噴口の噴口径を小さく形成
し、それより内側に噴霧を形成する内側の噴口、
即ち噴口の軸心線が燃焼室中央側へ指向する噴口
の噴口径を相対的に大きく形成したことである。 An object of the present invention is to focus on the above points, and to provide a side-injection diesel engine with
The purpose of the present invention is to provide a fuel injection valve that can improve temporal fuel dispersion and perform combustion with high air utilization rate and combustion efficiency. An outer nozzle that forms a spray around the periphery, i.e., an inner nozzle that forms a spray on the inner side, with a smaller nozzle diameter of the nozzle whose axis is directed toward the outer periphery of the combustion chamber;
That is, the nozzle diameter of the nozzle whose axis is directed toward the center of the combustion chamber is made relatively large.
この場合は噴霧同志の干渉が減少し、燃焼室中
央部の空気も充分に利用することができる。 In this case, interference between the sprays is reduced and the air in the center of the combustion chamber can be fully utilized.
以下図面を参照して本発明による実施例につき
説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本発明による第１実施例の構造を便宜上第３図
を使用して説明する。 For convenience, the structure of the first embodiment of the present invention will be explained using FIG.
噴口０９，１０，１１の噴口径d09、d10、d11を
d09＜d10＜d11とし、燃焼室外周部の噴霧を形成す
る外側の噴口ほど径を小さくした。 The nozzle diameters d 09 , d 10 , d 11 of nozzles 09, 10 , 11 are
d 09 < d 10 < d 11 , and the outer nozzle that forms the spray on the outer periphery of the combustion chamber has a smaller diameter.
上記構成の場合の作用について述べる。 The operation in the case of the above configuration will be described.
一般に噴口径が大きい程噴霧の貫徹力が強く、
小さいほど弱い。 Generally, the larger the nozzle diameter, the stronger the spray penetration power.
The smaller the weaker.
第４図に示すように本発明による燃料噴射弁２
２を用いた場合、噴霧２３〜２５は重なり合わな
い３本の噴霧として発達し、外側の噴霧２３は貫
徹力が弱く、内側の噴霧２５は貫徹力が強く形成
される。 As shown in FIG. 4, a fuel injection valve 2 according to the present invention
2, the sprays 23 to 25 develop as three sprays that do not overlap, with the outer spray 23 having a weak penetrating force and the inner spray 25 having a strong penetrating force.
空気渦流Ｓは内側の噴霧２５に強く外側の噴霧
２３に弱く作用するが、上記の噴霧の貫徹力の差
により内側の噴霧が外側の噴霧よりも大きく曲げ
られることはなく、同等の曲げられ方をするかあ
るいは外側よりも内側の噴霧の方が直進する。 The air vortex S acts strongly on the inner spray 25 and weakly on the outer spray 23, but due to the above-mentioned difference in the penetration force of the spray, the inner spray is not bent more than the outer spray, but is bent in the same way. Or the spray on the inside travels straighter than the spray on the outside.
上記貫徹力の差により形成された噴霧はそれぞ
れ異なつた時期に向い側の壁に衝突する。即ち内
側が早く外側が遅く衝突する。 The sprays formed due to the difference in penetration force collide with the opposite wall at different times. In other words, the inner side collides faster and the outer side collides later.
上述の場合には次の効果がある。 The above case has the following effects.
従来の燃料噴射弁を用いたシステムでは、各噴
霧の貫徹力は同等であるため、空気渦流により内
側の噴霧が大きく曲げられ噴霧同志の干渉が多く
なり燃焼が阻害され、また燃焼室中央に未利用の
空間が残り空気利用率が低下するが、本発明によ
れば、内側の噴霧は外側の噴霧よりも貫徹力が強
く相対的に曲げられず直進するため噴霧同志の干
渉も減少し、また燃焼室中央部の空気も利用する
ことができ、空気利用率、燃焼効率が向上する。 In systems using conventional fuel injection valves, the penetration force of each spray is the same, so the inner spray is greatly bent by the air vortex, causing more interference between the sprays and inhibiting combustion. However, according to the present invention, the inner spray has a stronger penetrating force than the outer spray and travels straight without being bent, which reduces interference between sprays. Air in the center of the combustion chamber can also be used, improving air utilization and combustion efficiency.
さらに、燃料噴霧が衝突する向い側の壁の位置
では貫徹力の差により各噴霧が時間差をもつて衝
突し空気不足により燃焼が阻害されることが少な
い。 Further, at the position of the wall on the opposite side where the fuel sprays collide, each spray collides with a time difference due to the difference in penetration force, so that combustion is less likely to be inhibited due to lack of air.
これらの効果により燃料が燃焼室内に空間的、
時間的に良好に分散され、空気利用率が高く、燃
焼効率の高い燃焼が得られる。 Due to these effects, the fuel is distributed spatially within the combustion chamber.
Combustion can be achieved with good temporal dispersion, high air utilization, and high combustion efficiency.
本発明による第２実施例は、４噴口で外側２本
と内側２本の噴口径をそれぞれ等しくし、外側を
小径に、内側を大径した場合であり、その噴霧状
態は第５図に示される。 The second embodiment of the present invention is a case where the outer two nozzles and the inner two nozzles are made equal in diameter with four nozzles, and the outside has a small diameter and the inside has a large diameter, and the spray state is shown in FIG. It will be done.
同じく第３実施例は、４噴口で外側が最も小径
で、内側が最も大径で、中２本が中間の径で等径
となつている場合であり、その噴霧状態は第６図
に示される。 Similarly, in the third embodiment, there are four nozzles, with the outer diameter being the smallest, the inner diameter being the largest, and the middle two having equal diameters, and the spray state is shown in FIG. It will be done.
同じく第４実施例は、４噴口で外側から内側に
順番に噴口径を大きくした場合であり、その噴霧
状態は第７図に示される。 Similarly, in the fourth embodiment, there are four nozzles, and the nozzle diameters are sequentially increased from the outside to the inside, and the spray state is shown in FIG.
いづれの場合も、各噴霧は重なり合わない状態
で発達し、第１実施例と同様な作用、効果があ
る。 In either case, the sprays develop without overlapping each other, and the same actions and effects as in the first embodiment are achieved.
なお、本発明はこの他に５噴口以上の燃料噴射
弁の場合も含む。 In addition, the present invention also includes the case of a fuel injection valve having five or more injection ports.
第１図は従来の側方噴射式デイーゼル機関の燃
焼室を示す説明図、第２図は第１図の−矢視
断面図、第３図は第１図の燃料噴射弁の先端部を
示す説明図、第４図は本発明による第１実施例の
噴霧状態を示す説明図、第５図は本発明による第
２実施例の噴霧状態を示す説明図、第６図は同じ
く第３実施例の噴霧状態を示す説明図、第７図は
同じく第４実施例の噴霧状態を示す説明図であ
る。
０１……燃焼室、０１ａ……シリンダヘツド、
０４，２２……燃料噴射弁、０９，１０，１１…
…噴口。
Figure 1 is an explanatory diagram showing the combustion chamber of a conventional side-injection diesel engine, Figure 2 is a sectional view taken along the - arrow in Figure 1, and Figure 3 shows the tip of the fuel injection valve in Figure 1. 4 is an explanatory diagram showing the spray state of the first embodiment according to the present invention, FIG. 5 is an explanatory diagram showing the spray state of the second embodiment according to the present invention, and FIG. 6 is an explanatory diagram showing the spray state of the second embodiment according to the present invention. FIG. 7 is an explanatory diagram showing the spray state of the fourth embodiment. 01... Combustion chamber, 01a... Cylinder head,
04, 22...Fuel injection valve, 09, 10, 11...
...spout.
Claims (1)
個の噴口をもつ燃料噴射弁を複数個配設すると共
に燃焼室に空気渦流が形成される側方噴射式デイ
ーゼル機関において、上記複数個の噴口のうち噴
口の軸心線が燃焼室外周部へ指向する噴口の噴口
径を同噴口よりも噴口の軸心線が燃焼室中央側へ
指向する噴口の噴口径よりも小さく形成したこと
を特徴とするデイーゼル機関の燃料噴射弁。1. In a side-injection diesel engine in which a plurality of fuel injection valves each having a plurality of nozzles are arranged around the cylinder head facing the combustion chamber and an air vortex is formed in the combustion chamber, The nozzle diameter of the nozzle whose axis line is directed toward the outer periphery of the combustion chamber is smaller than the nozzle diameter of the nozzle whose axis line is directed toward the center of the combustion chamber. Diesel engine fuel injection valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17988082A JPS5970874A (en) | 1982-10-15 | 1982-10-15 | Fuel injection valve for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17988082A JPS5970874A (en) | 1982-10-15 | 1982-10-15 | Fuel injection valve for diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5970874A JPS5970874A (en) | 1984-04-21 |
| JPH0119062B2 true JPH0119062B2 (en) | 1989-04-10 |
Family
ID=16073510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17988082A Granted JPS5970874A (en) | 1982-10-15 | 1982-10-15 | Fuel injection valve for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5970874A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0421009Y2 (en) * | 1984-09-17 | 1992-05-13 | ||
| JPS6199671U (en) * | 1984-12-05 | 1986-06-25 | ||
| JPS61218772A (en) * | 1985-03-25 | 1986-09-29 | Mitsui Eng & Shipbuild Co Ltd | Fuel injection device for diesel engine |
| JP5798898B2 (en) * | 2011-11-24 | 2015-10-21 | 三菱重工業株式会社 | Fuel injection device |
| JP2014148948A (en) * | 2013-02-01 | 2014-08-21 | Mazda Motor Corp | Diesel engine |
| JP2014148947A (en) * | 2013-02-01 | 2014-08-21 | Mazda Motor Corp | Diesel engine |
| JP2014156852A (en) * | 2013-02-19 | 2014-08-28 | Mazda Motor Corp | Compression ignition engine |
-
1982
- 1982-10-15 JP JP17988082A patent/JPS5970874A/en active Granted
Non-Patent Citations (1)
| Title |
|---|
| PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS=1969-1970 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5970874A (en) | 1984-04-21 |
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