CN1157881A - Diesel engine fuel injection nozzle with flat orifice - Google Patents
Diesel engine fuel injection nozzle with flat orifice Download PDFInfo
- Publication number
- CN1157881A CN1157881A CN 96123013 CN96123013A CN1157881A CN 1157881 A CN1157881 A CN 1157881A CN 96123013 CN96123013 CN 96123013 CN 96123013 A CN96123013 A CN 96123013A CN 1157881 A CN1157881 A CN 1157881A
- Authority
- CN
- China
- Prior art keywords
- spray orifice
- shape
- diesel engine
- flat
- cross
- 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
- 239000000446 fuel Substances 0.000 title abstract description 3
- 238000002347 injection Methods 0.000 title description 4
- 239000007924 injection Substances 0.000 title description 4
- 239000007921 spray Substances 0.000 claims description 23
- 239000000295 fuel oil Substances 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
A fuel nozzle for diesel engine features that the cross-section shape of its jet orifice may be non-axisymmetric oblateness, ellipse, rectangle, or part of ring, which can generate stronger non-axisymmetric burble, resulting in faster and finer atomization of jetted liquid, improvement on combustion, and reduction of harmful waste exhausted.
Description
The present invention relates to the fuel nozzle of diesel engine.
The diesel engine fuel oil nozzle of extensive use at present, the shape of its spray orifice cross section has two kinds, garden shape or ring.This is because people always think that axisymmetric hole is a kind of geometrical shape that helps atomizing most for a long time.Yet, further studies show that in recent years, nonaxisymmetrical geometrical shape might produce stronger asymmetric disturbance, and this disturbance may have the development speed not second to axisymmetric disturbance, thereby can infer, the spray orifice of some nonaxisymmetrical geometrical shape, can make the liquid jet fragmentation atomize sooner, thinner.
Purpose of the present invention just is to utilize the better atomization characteristics of nonaxisymmetrical flat spray orifice to improve the performance of diesel engine.Its main points are shape of cross sections of the spray orifice on the nozzle, also promptly from orifice center line direction (z direction, see Fig. 1] shape on the spray orifice border that obtains when seeing is not general circle, but a certain shape shown in Fig. 1 (b), wherein (1) is oval, (2) be rectangular (four jiaos can be the angle, garden), (3) are oval, and (4) are ring segment.The common feature of these shapes is, tangible nonaxisymmetry, and its length size L1 is not less than 1.2 with the ratio of little length dimension L2, all belongs to said flat here.
The spraying of flat spray orifice ejection no longer is that axisymmetric distributes, so the direction in spray orifice cross section is an important parameter.The direction difference in spray orifice cross section can make the distribution difference of mist of oil in the firing chamber, thus make air utilize the situation difference, the performance of diesel engine is also just different.The direction of flat spray orifice cross section can be as shown in Figure 1, can also be the z axle around the orifice center line also, rotation 0-90 degree angle, and promptly the direction of the minor axis L2 on the cross section becomes 0～90 ° with the y axle.In addition, the layout of the direction of each spray orifice also is very important when above when nozzle hole number is two, and the direction in each spray orifice cross section is with respect to the y direction in its projecting section, can identical unanimity, also can unanimity inequality, and for example alternately become 0 degree and 90 to spend with the y axle.
This flat spray orifice can for example be used the manufacturing of edm forming punching machine tool with the method manufacturing in processing profiled hole.
The present invention's nozzle can be used for diesel engine with direct injection, also can be used for half direct spray type (combined type etc.) and separate the cell-type diesel engine.
The diesel engine nozzle of using the present invention can improve the spray burning process, improves the power economy performance of diesel engine, reduces the discharging of harmful products of combustion.The flat spray orifice low-speed performance improved, because still can make fuel-oil atmozation good when injection pressure is low.This is better effects if in diesel engine with direct injection.
Claims (7)
1, a kind of diesel injector, the shape of cross section that it is characterized in that the fuel oil spray orifice on the nozzle is nonaxisymmetrical flat, the ratio of the size on the size on its length direction and the little length direction is not less than 1.2.
2, diesel injector according to claim 1, the shape of cross section that it is characterized in that spray orifice is for oblate.
3, diesel injector according to claim 1, the shape of cross section that it is characterized in that spray orifice is for oval.
4, diesel injector according to claim 1, the shape of cross section that it is characterized in that spray orifice are rectangular (four jiaos can be the angle, garden).
5, diesel injector according to claim 1, the shape of cross section that it is characterized in that spray orifice is a ring segment.
6, diesel injector according to claim 1, when the nozzle hole number on it is two when above, the direction of the shape of the flat of each flat spray orifice, homogeneous phase is with consistent.
7, diesel injector according to claim 1, when the nozzle hole number on it is two when above, the direction of the shape of the flat of each flat spray orifice, alternate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96123013 CN1157881A (en) | 1996-12-31 | 1996-12-31 | Diesel engine fuel injection nozzle with flat orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96123013 CN1157881A (en) | 1996-12-31 | 1996-12-31 | Diesel engine fuel injection nozzle with flat orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1157881A true CN1157881A (en) | 1997-08-27 |
Family
ID=5127562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96123013 Pending CN1157881A (en) | 1996-12-31 | 1996-12-31 | Diesel engine fuel injection nozzle with flat orifice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1157881A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929410A (en) * | 2009-06-18 | 2010-12-29 | 日立汽车系统株式会社 | Fuelinjection nozzle |
| CN103032232A (en) * | 2011-10-10 | 2013-04-10 | 中国科学院力学研究所 | Engine fuel nozzle |
| CN106150818A (en) * | 2016-08-24 | 2016-11-23 | 江苏大学 | A kind of internal combustion engine oval orifice fuel injector of band asymmetrical disturbance |
| CN112484076A (en) * | 2020-11-12 | 2021-03-12 | 南京航空航天大学 | Special-shaped nozzle for main-stage oil supply of lean-oil premixed pre-evaporation low-pollution combustion chamber |
| CN114216129A (en) * | 2021-11-29 | 2022-03-22 | 北京航化节能环保技术有限公司 | Medium atomizing nozzle suitable for burning viscous liquid |
-
1996
- 1996-12-31 CN CN 96123013 patent/CN1157881A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929410A (en) * | 2009-06-18 | 2010-12-29 | 日立汽车系统株式会社 | Fuelinjection nozzle |
| CN101929410B (en) * | 2009-06-18 | 2013-02-27 | 日立汽车系统株式会社 | Fuel injector |
| US8672239B2 (en) | 2009-06-18 | 2014-03-18 | Hitachi Automotive Systems, Ltd. | Fuel injector |
| CN103032232A (en) * | 2011-10-10 | 2013-04-10 | 中国科学院力学研究所 | Engine fuel nozzle |
| CN103032232B (en) * | 2011-10-10 | 2015-11-04 | 中国科学院力学研究所 | engine fuel nozzle |
| CN106150818A (en) * | 2016-08-24 | 2016-11-23 | 江苏大学 | A kind of internal combustion engine oval orifice fuel injector of band asymmetrical disturbance |
| CN112484076A (en) * | 2020-11-12 | 2021-03-12 | 南京航空航天大学 | Special-shaped nozzle for main-stage oil supply of lean-oil premixed pre-evaporation low-pollution combustion chamber |
| CN112484076B (en) * | 2020-11-12 | 2022-01-04 | 南京航空航天大学 | Special-shaped nozzle for main stage oil supply of lean oil premixed preevaporation low pollution combustion chamber |
| CN114216129A (en) * | 2021-11-29 | 2022-03-22 | 北京航化节能环保技术有限公司 | Medium atomizing nozzle suitable for burning viscous liquid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |