JPH061049B2 - Combustion device for diesel engine - Google Patents
Combustion device for diesel engineInfo
- Publication number
- JPH061049B2 JPH061049B2 JP59044837A JP4483784A JPH061049B2 JP H061049 B2 JPH061049 B2 JP H061049B2 JP 59044837 A JP59044837 A JP 59044837A JP 4483784 A JP4483784 A JP 4483784A JP H061049 B2 JPH061049 B2 JP H061049B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- fuel
- spray
- air
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
-
- 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)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【発明の詳細な説明】 本発明は側方噴射式（中央噴射式に対して）ディーゼル
機関に関する。The present invention relates to side-injection (as opposed to central-injection) diesel engines.
第１図はこの種機関の要部を示す断面図である。０１は
燃焼室，０２はピストン，０３は排気弁，０４は燃料
弁，０５は燃料噴霧である。第２図は第１図のII−II矢
視断面図で，０４は燃料弁，０６〜０８は燃料噴霧を示
す。第３図は上記燃料弁０４の先端図であり，０９，１
０，１１は噴口で，等噴口径，等間隔で，空気渦流方向
の成分を持つ方向に全て噴射する。ここで各燃料弁は、
第４図及び第５図に明らかなように、シリンダ軸に対し
て軸対称な位置に設置され、また各燃料弁の噴口配置
も、シリンダ中心軸に対して軸対称に設定されている。
第４図は燃焼室内の噴射方向を示す説明図で、ＳWは空
気渦流，１２は噴射方向，αは噴射方向と燃料弁及び燃
焼室中心を結ぶ直線のなす角度である。FIG. 1 is a sectional view showing a main part of this type of engine. Reference numeral 01 is a combustion chamber, 02 is a piston, 03 is an exhaust valve, 04 is a fuel valve, and 05 is a fuel spray. FIG. 2 is a sectional view taken along the line II-II of FIG. 1, in which 04 is a fuel valve and 06 to 08 are fuel sprays. FIG. 3 is a front view of the fuel valve 04.
Nos. 0 and 11 are jet holes, which are all jetted in a direction having an air vortex flow direction component at equal jet diameters and at equal intervals. Where each fuel valve is
As is apparent from FIGS. 4 and 5, the fuel cells are installed at positions axially symmetric with respect to the cylinder axis, and the injection port arrangement of each fuel valve is also set axially symmetric with respect to the cylinder center axis.
FIG. 4 is an explanatory view showing the injection direction in the combustion chamber, where S W is the air vortex, 12 is the injection direction, and α is the angle formed by the straight line connecting the injection direction with the fuel valve and the center of the combustion chamber.
上記構成において，ピストン０２の上昇により燃焼室０
１内の空気は圧縮され高温，高圧となり，上死点付近で
燃料弁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に空気を利用で
きるように形成され，さらに比較的強い空気渦流により
燃料と空気の混合が促進し，空気利用率を高めている
が，以下に示す欠点がある。In the above structure, the combustion chamber 0
The air in 1 is compressed to a high temperature and high pressure, and fuel is injected from the fuel valve 04 near the top dead center to form fuel sprays 06 to 08 as shown in the case of 3 injection holes in FIG. These sprays are formed so that the air can be used in all areas of the combustion chamber as much as possible, and the relatively strong air vortex promotes the mixing of fuel and air to increase the air utilization rate. is there.
第２図に示すように噴射された燃料は空気渦流ＳWによ
り曲げられながら火炎となって発達する。この時燃料噴
霧と空気渦流の相対速度の差及び渦流の上流，下流の位
置の相違により，空気渦流の影響は燃焼室中央側の噴霧
に強く，外周側の噴霧に弱く働く。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，中央側の噴
霧は大きく曲げられ，外周側の噴霧は曲げられる量が少
ない。従って，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，燃焼反応が阻
害される。さらに，中央側の燃料噴霧も反空気渦流方向
に速度成分を持っていないため，大きく曲げられるため
燃焼室中央部に空気の未利用領域が存在する。従って，
従来の燃料弁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，燃焼効率が十分でない。As shown in FIG. 2, the injected fuel is transformed into a flame while being bent by the air vortex S W. At this time, due to the difference in relative velocity between the fuel spray and the air vortex and the difference in the upstream and downstream positions of the vortex, the effect of the air vortex is strong on the spray on the center of the combustion chamber and weak on the spray on the outer periphery. However, since the penetration force of the spray is the same as that of each spray, the spray on the center side is greatly bent, and the spray on the outer peripheral side is bent less. Therefore, the entire spray develops as a lump, and in this area, the sprays or flames interfere with each other and the combustion reaction is hindered. Furthermore, since the fuel spray on the center side also has no velocity component in the anti-air vortex direction, it is bent significantly, and there is an unused air region in the center of the combustion chamber. Therefore,
With conventional fuel valves, the spatial and temporal fuel distribution to the combustion chamber is not appropriate, and the air utilization rate and combustion efficiency are not sufficient.
本発明の目的は上記の点に着目し，燃焼室内への空間
的，時間的な燃料分散を良好にし，空気利用率，燃焼効
率の高い燃焼を行う燃焼装置を提供することであり，そ
の特徴とするところは、シリンダヘッドの燃焼室周辺部
に、それぞれ複数個の噴口を持つ複数個の燃料弁をシリ
ンダ中心軸に対して軸対称に配置し、前記燃焼室内に空
気渦流が形成されるディーゼル機関の燃焼室において、
前記各燃料弁に３個以上の噴口をシリンダ中心軸に対し
て軸対称に配置し、前記噴口のうち燃焼室中央に近い１
個の噴口からの噴霧の流れが前記空気渦流の流れと逆の
速度成分を持ち、前記１個の噴口よりも外側の噴口から
の噴霧の流れが全て前記空気渦流の流れと同方向の速度
成分を持つようにしたことである。It is an object of the present invention to provide a combustion apparatus which pays attention to the above points, improves the spatial and temporal fuel distribution in the combustion chamber, and performs combustion with a high air utilization rate and a high combustion efficiency. That is, a plurality of fuel valves each having a plurality of injection holes are arranged around the combustion chamber of the cylinder head in axial symmetry with respect to the center axis of the cylinder, and a diesel vortex is formed in the combustion chamber. In the combustion chamber of the engine,
Three or more injection holes are arranged in each fuel valve in axial symmetry with respect to the cylinder center axis.
The flow of spray from each nozzle has a velocity component opposite to that of the air vortex, and the flow of spray from all nozzles outside the one nozzle is the velocity component in the same direction as the flow of the air vortex. Is to have.
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 according to the present invention will be described below with reference to the drawings.
第５図は本発明により形成する燃料噴霧の噴射方向の規
定を示す説明図，第６図は本発明による１実施例の燃料
弁を用いた場合の燃焼室内の燃料分散を示す説明図（３
噴口燃料弁の場合），第７図は本発明による他の実施例
の燃料弁を用いた場合の燃焼室内の燃料分散を示す説明
図（４噴口燃料弁の場合）である。FIG. 5 is an explanatory view showing the regulation of the injection direction of the fuel spray formed by the present invention, and FIG. 6 is an explanatory view showing the fuel dispersion in the combustion chamber when the fuel valve of one embodiment according to the present invention is used (3
FIG. 7 is an explanatory view showing the fuel distribution in the combustion chamber when a fuel valve of another embodiment according to the present invention is used (in the case of a four-hole fuel valve).
第５図の０１，０４，ＳWは第２図のそれと同じであ
り，１２は第４図に示す燃料噴射方向である。01,04 of FIG. 5, S W is the same as that of FIG. 2, 12 is a fuel injection direction shown in Figure 4.
第６図の１３，１４，１５は本発明による燃料弁（３噴
口）を用いた場合に形成される噴霧であり，特に１５が
本発明により形成される噴霧である。Reference numerals 13, 14 and 15 in FIG. 6 are sprays formed when the fuel valve (3 injection ports) according to the present invention is used, and particularly, 15 is a spray formed according to the present invention.
第７図も同様であり，１６，１７，１８，１９が本発明
による燃料弁（４噴口）を用いた場合に形成される噴霧
群であり，特に１９が本発明により形成される噴霧であ
る。FIG. 7 is also the same, and 16, 17, 18, and 19 are spray groups formed when the fuel valve (4 injection ports) according to the present invention is used, and 19 is a spray formed according to the present invention. .
上記の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.
本発明による燃料弁を用いた場合，燃焼室中央部に最も
近い噴霧は，第５図に示すように，空気渦流の方向と逆
の方向の成分を持つような方向に噴射される。When the fuel valve according to the present invention is used, the spray closest to the center of the combustion chamber is injected in a direction having a component opposite to the direction of the air vortex, as shown in FIG.
上記の噴射された燃料噴霧は，最初は空気渦流の方向と
逆の方向の成分を持つような方向に発達するが，強い空
気渦流により曲げられ燃焼室中央部に集まるように発達
する。Initially, the injected fuel spray develops in a direction having a component opposite to the direction of the air vortex, but it is bent by the strong air vortex and collects in the center of the combustion chamber.
上述の場合には次の効果がある。In the above case, there are the following effects.
従来の燃料弁を用いた場合，燃焼室中心に近い燃料噴霧
は空気渦流により大きく曲げられ，燃焼室中心部は燃料
噴霧は行かず，燃料が分散されないことになり，空気利
用率が不十分となるが，本発明による燃料弁を用いた場
合，第６図に３噴口，第７図に４噴口の例を示すよう
に，第４図に示した燃焼室中心に近い噴口の噴射方向を
空気渦流と逆の成分を持つように，噴射されることにな
るが，強い空気渦流によって流されるため燃焼室中心部
に集まるようになるため，燃焼室中心部の空気を有効に
利用することができ，空気利用率が向上し，燃焼効率の
高い燃焼が得られる。When a conventional fuel valve is used, the fuel spray near the center of the combustion chamber is greatly bent by the air vortex, the fuel spray does not occur in the center of the combustion chamber, and the fuel is not dispersed, resulting in an insufficient air utilization rate. However, when the fuel valve according to the present invention is used, as shown in the example of 3 nozzles in FIG. 6 and 4 nozzles in FIG. 7, the injection direction of the nozzles near the center of the combustion chamber shown in FIG. It will be injected so that it has a component opposite to the vortex flow, but it will be gathered in the center of the combustion chamber due to the strong air vortex flow, so the air in the center of the combustion chamber can be used effectively. , The air utilization rate is improved, and combustion with high combustion efficiency is obtained.
第１図は従来の側方噴射式ディーゼル機関の要部を示す
断面図，第２図は第１図のII−II矢視断面図，第３図は
燃料弁先端部を示す側面図，第４図は燃焼室内の噴射方
向を示す説明図，第５図は本発明により形成する燃料噴
霧の噴射方向の規定を示す説明図，第６図は本発明によ
る１実施例の燃料弁を用いた場合の燃焼室内の燃料分散
を示す説明図，第７図は本発明による他の実施例の燃料
弁を用いた場合の燃焼室内の燃料分散を示す説明図であ
る。 ０１…燃焼室，０４…燃料弁，１２…燃料噴射方向，Ｓ
W…空気渦流，１３〜１９…噴霧。FIG. 1 is a sectional view showing a main part of a conventional side-injection diesel engine, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a side view showing a fuel valve tip. FIG. 4 is an explanatory view showing the injection direction in the combustion chamber, FIG. 5 is an explanatory view showing the regulation of the injection direction of the fuel spray formed by the present invention, and FIG. 6 uses the fuel valve of one embodiment according to the present invention. FIG. 7 is an explanatory view showing the fuel distribution in the combustion chamber in the case of FIG. 7, and FIG. 7 is an explanatory view showing the fuel distribution in the combustion chamber when the fuel valve of another embodiment according to the present invention is used. 01 ... Combustion chamber, 04 ... Fuel valve, 12 ... Fuel injection direction, S
W ... Air vortex, 13-19 ... Spray.
Claims (1)
れ複数個の噴口を持つ複数個の燃料弁をシリンダ中心軸
に対して軸対称に配置し、前記燃焼室内に空気渦流が形
成されるディーゼル機関の燃焼室において、前記各燃料
弁に３個以上の噴口をシリンダ中心軸に対して軸対称に
配置し、前記噴口のうち燃焼室中央に近い１個の噴口か
らの噴霧の流れが前記空気渦流の流れと逆の速度成分を
持ち、前記１個の噴口よりも外側の噴口からの噴霧の流
れが全て前記空気渦流の流れと同方向の速度成分を持つ
ように構成したことを特徴とするディーゼル機関の燃焼
装置。1. A diesel engine in which a plurality of fuel valves each having a plurality of nozzles are arranged around the combustion chamber of a cylinder head in axial symmetry with respect to the cylinder center axis, and an air vortex is formed in the combustion chamber. In a combustion chamber of an engine, three or more injection ports are arranged in each fuel valve in axial symmetry with respect to a cylinder center axis, and the flow of the spray from one injection port near the center of the combustion chamber is the air. It is characterized in that it has a velocity component opposite to that of the vortex flow, and that all of the spray flow from the nozzles outside the one nozzle has a velocity component in the same direction as the air vortex flow. Diesel engine combustion equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59044837A JPH061049B2 (en) | 1984-03-10 | 1984-03-10 | Combustion device for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59044837A JPH061049B2 (en) | 1984-03-10 | 1984-03-10 | Combustion device for diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60190619A JPS60190619A (en) | 1985-09-28 |
| JPH061049B2 true JPH061049B2 (en) | 1994-01-05 |
Family
ID=12702581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59044837A Expired - Lifetime JPH061049B2 (en) | 1984-03-10 | 1984-03-10 | Combustion device for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061049B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62139923A (en) * | 1985-12-13 | 1987-06-23 | Isuzu Motors Ltd | Diesel internal combustion engine |
| DK177917B1 (en) * | 2001-05-23 | 2015-01-05 | Man Diesel & Turbo Deutschland | Cylinder in a two-stroke long-rinsed cross-head motor and method for reducing NOx formation |
| KR100643823B1 (en) | 2004-04-29 | 2006-11-10 | 엠에이엔 비앤드떠블유 디젤 에이/에스 | A crosshead Diesel engine having cylinders with combustion chambers, and a method of injecting fuel in such engine |
| JP5798898B2 (en) * | 2011-11-24 | 2015-10-21 | 三菱重工業株式会社 | Fuel injection device |
-
1984
- 1984-03-10 JP JP59044837A patent/JPH061049B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60190619A (en) | 1985-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |