JPS58106167A - Fuel injection nozzle of internal-combustion engine - Google Patents
Fuel injection nozzle of internal-combustion engineInfo
- Publication number
- JPS58106167A JPS58106167A JP20513481A JP20513481A JPS58106167A JP S58106167 A JPS58106167 A JP S58106167A JP 20513481 A JP20513481 A JP 20513481A JP 20513481 A JP20513481 A JP 20513481A JP S58106167 A JPS58106167 A JP S58106167A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- fuel
- inclination angle
- nozzle hole
- 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.)
- Pending
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
- 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
- F02M61/1826—Discharge orifices having different sizes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、燃料の噴霧特性を良好なものとするための
ディーゼル機関等の内燃機関に使用される燃料噴射ノズ
ルに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection nozzle used in an internal combustion engine such as a diesel engine for improving fuel spray characteristics.
第１図に示されるように、従来のディーゼル機関に使用
される燃料噴射ノズル１は、エンジンの構造等の理由に
より、シリンダー中心軸に対してノズル傾き角θ１をも
って装着され、ざらに噴孔は、多孔で噴孔２及び３等の
ようにノズル中心軸に対してそれぞれ大きい傾き角θ２
及び小さい傾き角θ３等をもって開けられている。従来
、この種のノズルでは、一般に噴孔の傾き角θ２および
０３等の違いや噴孔径ｄ２及びｄ３等の違いによって、
ノズルの後側の大きい傾き角θ２の噴孔２より噴射され
る燃料の噴霧形状は、燃料が広く分散したまゆ型Ａの形
状を呈し、ノズル１の前側の小さい傾き角θ３の噴孔３
より噴射される燃料の噴霧形状は、燃料が余り分散して
いない円錐へ！Ｂの形状を呈する。このために、噴霧形
状が不揃いとなり、燃焼室内に均一に燃料を分配づるこ
とができないという欠点があった。As shown in Fig. 1, a fuel injection nozzle 1 used in a conventional diesel engine is installed with an inclination angle θ1 relative to the cylinder center axis due to the structure of the engine, etc., and the nozzle hole is roughly , multi-hole nozzle holes 2 and 3 each have a large inclination angle θ2 with respect to the nozzle center axis.
and a small inclination angle θ3. Conventionally, in this type of nozzle, there are generally
The spray shape of the fuel injected from the nozzle hole 2 with a large inclination angle θ2 on the rear side of the nozzle is a cocoon-shaped shape A in which the fuel is widely dispersed.
The spray shape of the injected fuel becomes a cone where the fuel is not dispersed very much! It exhibits the shape of B. As a result, the shape of the spray becomes irregular, resulting in the disadvantage that the fuel cannot be evenly distributed within the combustion chamber.
この発明をよ、噴孔入口部に面取りを施すことにより、
噴孔の傾き角や噴孔径の違いに係わらす噴霧を一様なま
ゆ型Ａの形状とし、−Ｆ述のような欠点を取り除どこと
をその目的としたものである。In accordance with this invention, by chamfering the nozzle hole inlet,
The purpose is to make the spray uniform in the shape of a cocoon-shaped A regardless of the inclination angle of the nozzle hole and the nozzle diameter, and to eliminate the drawbacks mentioned in -F.
この発明を図面に示す実施例に基づいて説明リ−ると、
第１図において、円錐型Ｂの形状を〒する噴霧特性を持
つノズル中心軸に対して小さい傾す角θ３の噴孔３の入
口部すなわち第２図の詳細図に示される噴孔入口部Ｃの
みに電解パリ取りによる面取りを施す。これにより、噴
孔入口部Ｃは、第３図の噴孔入口部りに示されるように
、その噴孔入口部の噴孔径を増し、噴孔径がｄ３である
流路の長さを短くすることになる。そのため、噴孔の流
路内の燃料の流れの状態が変化し、噴霧形状は、噴孔２
の場合のようなまゆ型Ａとなり、噴霧特性は一様なもの
となる。This invention will be explained based on the embodiment shown in the drawings.
In FIG. 1, the inlet portion of the nozzle hole 3 has a small inclination angle θ3 with respect to the central axis of the nozzle, which has the spray characteristic of having a conical shape B, that is, the nozzle hole inlet portion C shown in the detailed view of FIG. Chamfer the chisel using electrolytic deburring. As a result, the nozzle hole inlet portion C increases the nozzle hole diameter at the nozzle hole inlet portion and shortens the length of the flow path where the nozzle hole diameter is d3, as shown in the nozzle hole inlet portion in Fig. 3. It turns out. Therefore, the state of the flow of fuel in the flow path of the nozzle hole changes, and the spray shape changes from the nozzle hole 2.
It becomes a cocoon type A as in the case of , and the spray characteristics become uniform.
第４図は、噴孔４及び５等の噴孔のノズル中心軸に対し
て大きい傾き角θ４及びノズル中心軸に対して小さい傾
き角θ５等や噴孔径ｄ４及びｄ５等の違いにより、噴孔
入口部Ｅ及びＦ等に示されるように、ノズル中心軸に対
して小さい傾き角θ５の噴孔５の入口部Ｆの面取りが、
ノズル中心軸に対して大きい傾き角θ４の噴孔４の入口
部Ｅの面取りより大きく、電解パリ取りによる面取りの
程度を変え、噴孔部入口径の増大量や噴孔径がｄ４及び
ｄ５等である流路の長さの縮小量に違いを与えることに
より、噴霧特性を一様なものとした一般の場合の実施例
である。Fig. 4 shows the differences in the nozzle holes such as the large inclination angle θ4 with respect to the nozzle center axis and the small inclination angle θ5 with respect to the nozzle center axis of the nozzle holes such as nozzle holes 4 and 5, and the differences in the nozzle hole diameters d4 and d5. As shown in the inlet parts E and F, etc., the chamfering of the inlet part F of the nozzle hole 5, which has a small inclination angle θ5 with respect to the nozzle central axis,
It is larger than the chamfering of the inlet part E of the nozzle hole 4 with a large inclination angle θ4 with respect to the nozzle center axis, and the degree of chamfering by electrolytic deburring is changed, and the increase amount of the nozzle part inlet diameter and the nozzle hole diameter are d4, d5, etc. This is an example in which the spray characteristics are made uniform by varying the amount of reduction in the length of a certain flow path.
この発明は、以上で説明したように、ノズル噴孔の傾き
角や噴孔径の違いにしたがって、噴孔人■］部の面取り
の程度を変化させることにより、燃料の噴霧形状を一様
なものとし、燃焼室内に均一に燃料を分配することを可
能とする効果がある。As explained above, this invention makes the shape of the fuel spray uniform by changing the degree of chamfering of the nozzle nozzle hole depending on the inclination angle and nozzle diameter of the nozzle nozzle hole. This has the effect of making it possible to evenly distribute fuel within the combustion chamber.
第１図は、従来の噴孔を有するノズルの縦断面図、第２
図は、従来の噴孔部の詳細を示す縦断面図、第３図ない
し第４図は、この発明の実施例を示す噴孔部詳細の縦断
面図である。
１・・・ノズル、２．３，４．５・・・ノズル噴孔、θ
２．θ３．θ４．θ５・・・噴孔の傾き角、ｄ２．
ｄ３． ｄ４． ｄ５・・・噴孔径。
特許出願人
日 野 自動車工業 株式公判
代 理 人Figure 1 is a vertical cross-sectional view of a nozzle with conventional nozzle holes;
The figure is a longitudinal sectional view showing details of a conventional nozzle hole section, and FIGS. 3 and 4 are longitudinal sectional views showing details of a nozzle hole section according to an embodiment of the present invention. 1... Nozzle, 2.3, 4.5... Nozzle nozzle hole, θ
2. θ3. θ4. θ5...Inclination angle of nozzle hole, d2.
d3. d4. d5... Nozzle hole diameter. Patent applicant Hino Jidosha Kogyo Stock trial attorney
Claims (1)
心軸に対して大きい傾き角で設けた噴口とを有する内燃
機関の燃料噴射ノズルにおいて、前記中心軸に対して小
さい傾き角で設けた噴口の入１」部の面取りを前記中心
軸に対して大きい傾き角で設けた噴口入口部より大きく
したことを特徴とづる内燃Ｉ！関の燃料噴射ノズル。A fuel injection nozzle for an internal combustion engine having a nozzle provided at a small inclination angle with respect to the nozzle central axis and a nozzle provided at a large inclination angle with respect to the central axis, wherein the nozzle is provided at a small inclination angle with respect to the central axis. The internal combustion engine I! is characterized in that the chamfer of the inlet part of the nozzle is larger than that of the nozzle inlet, which is provided at a large angle of inclination with respect to the central axis. Seki fuel injection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20513481A JPS58106167A (en) | 1981-12-21 | 1981-12-21 | Fuel injection nozzle of internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20513481A JPS58106167A (en) | 1981-12-21 | 1981-12-21 | Fuel injection nozzle of internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58106167A true JPS58106167A (en) | 1983-06-24 |
Family
ID=16501985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20513481A Pending JPS58106167A (en) | 1981-12-21 | 1981-12-21 | Fuel injection nozzle of internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58106167A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5016820A (en) * | 1988-07-26 | 1991-05-21 | Lucas Industries Public Limited Company | Fuel injectors for internal combustion engines |
| EP0890735B2 (en) † | 1997-07-11 | 2014-09-10 | Robert Bosch Gmbh | Fuel injection valve |
| RU2726449C1 (en) * | 2019-12-30 | 2020-07-14 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Sprayer for diesel injector |
-
1981
- 1981-12-21 JP JP20513481A patent/JPS58106167A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5016820A (en) * | 1988-07-26 | 1991-05-21 | Lucas Industries Public Limited Company | Fuel injectors for internal combustion engines |
| EP0890735B2 (en) † | 1997-07-11 | 2014-09-10 | Robert Bosch Gmbh | Fuel injection valve |
| RU2726449C1 (en) * | 2019-12-30 | 2020-07-14 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Sprayer for diesel injector |
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