CN100564865C - Fuel injection nozzle - Google Patents
Fuel injection nozzle Download PDFInfo
- Publication number
- CN100564865C CN100564865C CNB2005100519828A CN200510051982A CN100564865C CN 100564865 C CN100564865 C CN 100564865C CN B2005100519828 A CNB2005100519828 A CN B2005100519828A CN 200510051982 A CN200510051982 A CN 200510051982A CN 100564865 C CN100564865 C CN 100564865C
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- China
- Prior art keywords
- nozzle
- fuel injection
- vertical hole
- hole
- injection nozzle
- 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 - Fee Related
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- 239000000446 fuel Substances 0.000 title claims abstract description 83
- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 238000010304 firing Methods 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001473 noxious effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
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- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The especially used fuel injection nozzle of large-scale diesel engine of a kind of combustion engine has been proposed, it has nozzle body (2) and is connected in nozzle tip (3) on the nozzle body (2), valve needle (7) places nozzle body (2) inside, wherein the end of valve needle and valve seat (8) cooperating is so that make when open position, valve needle (7) is opened a fuel passage on valve seat (8), when closed position, then close this path, vertically hole (32) extends through nozzle tip (3) and has flow diameter from valve seat (8), also have at least one nozzle bore (31), it begins to extend and fuel can be by the firing chamber (20) that wherein enters combustion engine from vertical hole (32).Vertically the length (L) in hole (32) equals 17 at least with the ratio of the flow diameter in vertical hole (32), preferably equals 20 at least, particularly preferably greater than 22.
Description
Technical field
The present invention relates to the used fuel injection nozzle of a kind of combustion engine, have nozzle body and the nozzle tip that is connected on the nozzle body, valve needle places nozzle body inside, wherein the end of valve needle and valve seat cooperating are so that make when open position, valve needle is opened a fuel passage on valve seat, when closed position, then close this path, vertically the hole extends through nozzle tip and has flow diameter from valve seat, also have at least one nozzle bore, it begins to extend from vertical hole and fuel can be by the firing chamber that wherein enters combustion engine.
Background technique
For example the large-scale diesel engine according to two stroke method work is used as the drive train of boats and ships or is used for the used fixing device of generating electricity.Fuel injection nozzle with nozzle body and nozzle tip is generally used in this diesel engine.Usually, a plurality of nozzle bores are arranged in the nozzle tip, fuel injects the firing chamber by these nozzle bores.In order to begin or the end injection process, a kind of movable valve needle is provided in the fuel injection nozzle, and itself and valve seat cooperating are so that make the path that leads to nozzle bore open or close.
Usually, because nozzle tip stands high heat, machinery and chemical load set, so nozzle tip is easily frayed part.Especially, mechanical load relates to high injection pressure, and this pressure may total over 1.05 * 10
5Handkerchief (kilobar).Thermal load is caused by the huge temperature fluctuation between the cleaning air temperature of the high temperature in the firing chamber and combustion temperature and new supply, and the reason of chemical load mainly is high temperature erosion or thermal etching.
Owing to these reasons, especially because thermal load, thereby so valve seat be arranged to leave the nozzle bore certain distance usually and avoid excessively standing ignition heat.
Valve seat is relevant with following problem with space length between the nozzle bore.When finishing fuel and spray, valve needle is pressed in the valve seat so that make that being in valve seat downstream-in other words be is between valve seat and the nozzle bore-fuel no longer carry propelling pressure.After spray finishing, the fuel that remaines in the nozzle tip may enter the firing chamber of serious atomizing by nozzle bore, and only is to burn a little or not burning at this fuel.This just causes the particularly extra pollution of cigarette of waste gas, and causes unburned fuel to be deposited on all parts of firing chamber and the parts of carrying waste gas in some cases.
Summary of the invention
Because therefore this state of prior art an object of the present invention is to propose a kind of fuel injection nozzle that has nozzle tip, utilize it discharge of noxious emission can be kept very little, and ability to work or reliability can not be affected.
The theme of the present invention of being satisfied with this purpose is characterised in that the used fuel injection nozzle of a kind of combustion engine with following feature.
Therefore, according to the present invention, the combustion engine that is proposed the especially used fuel injection nozzle of large-scale diesel engine has nozzle body and the nozzle tip that is connected on the nozzle body, valve needle places nozzle body inside, wherein the end of valve needle and valve seat cooperating are so that make when open position, valve needle is opened a fuel passage on valve seat, when closed position, then close this path, vertically the hole extends through nozzle tip and has flow diameter from valve seat, also has at least one nozzle bore to begin to extend from vertical hole and fuel can be by wherein entering the firing chamber of combustion engine.Vertically the length in hole equals 17 at least with the ratio of the flow diameter in vertical hole, preferably equals 20 at least, particularly preferably greater than 22.
Utilize this design of fuel injection nozzle and nozzle tip, compare with known nozzle tip, can reduce significantly valve seat and nozzle bore-blind hole-between volume.Because the length in the vertical hole of nozzle tip and the ratio of flow diameter significantly reduce, just making can be with volume reducing 50% or more.As a result, after course of injection stops, only there is less a lot of fuel to be present in the nozzle tip, thereby makes the caused negative effect of this fuel-especially noxious emission-significantly minimizing.
According to a preferred embodiment, all nozzle bores have formed total flow diameter of fuel together, and the flow diameter in vertical hole is equivalent to 2 times of all nozzle bore flow diameter at the most, is preferably at least 0.5 times and 1.5 times at the most.
Preferably, vertically the hole has widened section in the nozzle bore zone.This local widened section has two advantages.Under the given situation of nozzle bore quantity, these nozzle bores lead to distance between each opening in vertical hole can be chosen to bigger so that can reduce thus by the mechanical pressure peak value in the caused nozzle tip material of internal pressure.And local widened section has alleviated the deflection that goes out to enter the fuel stream of nozzle bore from vertical orifice flow, the hydraulic friction losses when utilizing this method just to reduce fuel flow nozzle hole.
Being formed asymmetrically widened section with respect to the longitudinal axis in vertical hole may be more favourable.From the viewpoint of manufacturing technology, this is easier to realize.And in providing the zone of nozzle bore, the wall thickness of nozzle tip can be thinner than the zone that does not have nozzle bore.Thereby the excessive concentrations that such advantage is a nozzle bore can oversizely not avoid fuel to spray.
This favourable nonsymmetry also can be extended by the longitudinal axis that makes vertical hole favour nozzle tip and realized or additionally realize.
Preferably, each nozzle bore is according to leading in vertical hole greater than 90 ° angle, and this just means that nozzle bore is from the downward-sloping extension in vertical hole in interior configuration state.Returning of fuel stream simplified in this measure, thereby works to reduce hydraulic friction losses.
Another kind be used to the to reduce friction favourable measure of loss is to make transition region between vertical hole and the nozzle bore to be rounding in all cases.
From the viewpoint of stream technology, the path at the verified valve seat place when the open position that is being in valve needle in has one during at least with same big regional of the flow section in vertical hole, and is just more favourable.
Because the normally easily frayed part of nozzle tip, nozzle tip is connected on the nozzle body removably so those of fuel injection nozzle design preferably.
Fuel injection nozzle according to the present invention is specially adapted to diesel engine, especially the two-stroke large diesel machine.
Description of drawings
By means of drawings and Examples, with the present invention will be described in more detail.The schematic figures part illustrates with the sectional view form:
Fig. 1: have substantial section according to nozzle tip embodiment's of the present invention fuel injection nozzle embodiment,
Fig. 2: the view of nozzle tip bottom,
Fig. 3: second embodiment's nozzle tip,
Fig. 4: the enlarged view of the lower area of the nozzle tip among Fig. 3,
Fig. 5: the 3rd embodiment's nozzle tip.
Embodiment
In order to understand the present invention, Fig. 1 shows substantial section according to fuel injection nozzle embodiment of the present invention in the mode of the longitudinal sectional view that has reference number 1.For clarity sake, omitted for the example explanation of the basis of the fuel injection nozzle of known type as well-known element.In the cylinder head 10 of the two-stroke large diesel machine of built-in motor as boats and ships of the fuel injection nozzle shown in Fig. 1 and so on.With reference to the accompanying drawings, under interior configuration state, the lower end of fuel injection nozzle 1 extends in the firing chamber 20 of cylinder of diesel engine.
, should be understood to example feature and be not determinant attributes with reference to always relevant such as the relative position of " top, below upwards, downwards ... " and so on example explanation in the accompanying drawing.
Fuel injection nozzle 1 comprises nozzle body 2 and is connected in the embodiment of the nozzle tip 3 on the nozzle body 2.Among the described herein embodiment, connect and utilize maintenance lining 4 to realize, this keeps lining 4 tapered towards the longitudinal axis A of fuel injection nozzle 1 at lower end.Longitudinal axis A is the longitudinal axis A of nozzle tip 3 simultaneously.Keep lining 4 to be attached on the nozzle body 2 by lining nut 5 with as the flexible element 45 of circlip and so on.Nozzle tip 3 is supported in the tapering part that keeps axle sleeve 4.
Fig. 2 shows the view of the bottom of nozzle tip 3, wherein is provided with five nozzle bores 31 as can be seen.Nozzle bore 31 from vertical hole 32 along the firing chamber 20 be directed downwards obliquely and extend, promptly each nozzle bore 31 leads in vertical hole 32 with the angle [alpha] (Fig. 1) greater than 90 °.
As shown in Figure 1, vertically the length L in hole 32 be meant the valve seat 8 that valve needle 7 is contacted when in the closed position the surface shown in distance L between the end, firing chamber, bottom in bottom and vertical hole.
The so-called blind hole of volume between valve seat 8 and the nozzle bore 31.
Be designed to herein to be essentially among the embodiment in columniform hole vertical hole 32 longitudinally axis A extend.Vertically the diameter D in hole 32 has determined flow diameter and then has determined flow section, and flow section refers to the section area that fuel stream can obtain in vertical hole 32.If vertically the hole is not designed to cylindrical but has the diameter of variation, as coning, phrase " the vertically flow section or the flow diameter in hole " refers to its minimum flow section or flow diameter so.
Each nozzle bore 31 is designed to cylindrical hole in all cases too.Their diameter b (Fig. 2) has all determined the flow section in respective nozzle hole 31 in all cases.The diameter b of each nozzle bore may be different from nozzle bore to nozzle bore, and perhaps the diameter of some or all nozzle bore 31 may be identical.In all cases, the flow section that is determined by each nozzle bore 31 is added up and is total flow section of nozzle bore.Therefore, all nozzle bores-this be five-the flow section sum refer to total flow section of nozzle bore 31, promptly flow out total flow section that the fuel that enters firing chamber 20 can be used from vertical hole 32.Similarly, this point is applicable to total flow diameter of nozzle bore 31.
According to the present invention, the length L that fuel injection nozzle 1 or nozzle tip 3 are designed so that vertical hole 32 equals 17 at least with the ratio of the flow diameter in vertical hole, preferably equals 20 at least, particularly preferably greater than 22.
By this measure, blind hole, i.e. volume between the upstream of the downstream of valve seat 8 and nozzle bore 31 is compared to reduce with known embodiment and is surpassed 50%.As a result, after course of injection stops, when valve needle is pressed into valve seat 8 with being sealed again, owing to blind hole significantly diminishes, so have only the fuel of much less to be present in the downstream of valve seat.As a result, after the course of injection of firing chamber and toxic emission parts finishes, reduce very significantly by the noxious emission that fuel caused in the blind hole.
Because vertically the length L in hole 32 and the described ratio of its flow diameter equal 17 at least, preferably equal 20 at least, particularly preferably greater than 22, therefore just make significantly not degenerate or stride across the volume that has advantageously reduced blind hole under the very not big situation of the pressure reduction of nozzle tip 3 in hydraulic features.
In a particular embodiment, be about the situation of 2.1mm for diameter, vertically the length in hole is for example about 48.1mm, and is about the situation of 2.9mm for diameter, and the length in vertical hole is about 70.7mm.
Preferably, in this set, nozzle tip 3 is designed such that the flow diameter in vertical hole is at most the twice of total flow diameter of nozzle bore 31.In fact, verified very worth is that vertically the flow diameter in hole is equivalent to 0.5 times of nozzle bore 31 total flow diameter at least, and is equivalent to its 1.5 times at the most.
In running state, fuel injection nozzle 1 work is as follows.Fuel enters pressure space 6 by supply line 12.In order to begin to spray, for example by valve that being connected between the common rail pressure storage of fuel and the pressure space 6 is open, perhaps the fuel quilt is delivered to pressure chamber 6 by jet pump.There, the fuel valve needle 7 of packing into, and the prestressing force that overcomes unshowned pressure spring mentions valve needle and lifts off a seat 8, so that make the path that enters nozzle tip 3 open.Fuel flows through vertical hole 32 and injects firing chamber 20 by nozzle bore 31.For end injection, by finishing supply of fuel or close the pressure in the little pressure space 6, so that make valve needle 7 be pushed in the valve seat once more and close fuel passage by pressure spring with being connected of common rail pressure storage.Because significantly reduced the volume of blind hole, then after the valve seat place had closed path, the fuel of much less splashed in the firing chamber 20.
The flow section in vertical hole 32 of the nozzle tip that is embodied by the minor diameter D in vertical hole 32 by remarkable minimizing promptly by reducing the blind hole volume, has just increased the friction between fuel and the hole wall.This is equivalent to cause bigger pressure to fall or the pressure loss by nozzle tip 3.Fall suitably by the pressure due to the friction in the nozzle tip according to the present invention and may reach 5.25 * 10
3-1.05 * 10
4Handkerchief (50-100 crust).Carrying out in the modern large-scale diesel engine of work according to rail principle altogether, thisly can be compensated simply by the fuel pressure in the corresponding increase common rail pressure storage by the pressure drop due to the friction.Therefore, especially also be included in when being in, just guaranteed still to exist enough pressure-for example 5.25 * 10 than low engine speed range
4-7.35 * 10
4Handkerchief (500-700 crust)-come by nozzle bore 31 actual injected fuel, thus guarantee that fault-free ground injects firing chamber 20.
Alternatively, or additionally, can take other measure to compensate at least in part, i.e. the flow resistance that increases because of the blind hole volume reducing because of flow section reduces.
Therefore, for instance, the cross section of nozzle bore 31 can be strengthened.And, advantageously, design has transition zone so that make it be rounding in all cases between vertical hole 32 and the nozzle bore 31, and fuel is easier to flow out from vertical hole 32 and enters the nozzle bore 31 thus, thereby can be by the minimizing of round form realization flow resistance.
Another very favorable measure illustrates in according to second embodiment shown in Fig. 3 and 4 of nozzle tip of the present invention.Function part identical or of equal value is represented with same reference numbers respectively in the accompanying drawings.
Fig. 3 shows second embodiment's section, and Fig. 4 shows the amplification diagram of the lower area of nozzle tip 3.Shown in Fig. 3 and 4, in this embodiment, vertically hole 32 has widened section 321 in the zone of nozzle bore 31.Provide five nozzle bores 31 among second embodiment equally, be similar to shown in Fig. 2.
Because the existence of widened section 321, therefore fuel flow out from vertical hole 32 enter the nozzle bore 31 flow may be easier, therefore flow resistance is reduced to minimum, and this is to be easier to enter the nozzle bore 31 because of the fuel that the larger cross-section from widened section 321 flows out.Therefore, the hydraulic frictional in the time of in the flow nozzle hole 31 is also reduced.
And widened section has additional advantage.For having the giving for the nozzle bore 31 of determined number of given diameter and given rounding degree in the opened areas, the distance that nozzle bore 31 enters between each opening in vertical hole 32 can become big.The advantage of this bigger distance has been to reduce the mechanical stress peak value in the nozzle tip material.
Another favourable measure is to form about longitudinal axis 32 asymmetric widened section 321, and this especially can see in Fig. 4.The longitudinal axis in vertical hole 32 in this embodiment and the longitudinal axis A of nozzle 3, promptly the longitudinal axis A with jet nozzles 1 is identical.The longitudinal axis C of widened section 321 is parallel to but departs from out longitudinal axis A and extend, so that make widened section 321 asymmetric or eccentric about vertical hole 32.
The advantage of this measure is can reduce by being positioned at the widened section 321 that towards the firing chamber 20 side places promptly have nozzle bore 31 places than the relatively thick of the determined nozzle tip 3 of minor diameter D by vertical hole.From the viewpoint of mechanical load, bigger wall thickness can be more favourable, but so also caused nozzle bore 31 to become longer in all cases.Can have shortcoming like this, may cause too bunchy of the fuel jet that flows through because the length of nozzle bore is excessive, and this can have negative effect to course of injection.This point can be avoided by widened section 32, because the wall thickness that is positioned at towards the firing chamber side of 20 of nozzle tip 3 becomes littler, so nozzle bore 31 becomes littler.And the asymmetrical design of widened section 321 is easier to make.
Utilize the 3rd embodiment according to nozzle tip of the present invention shown in Figure 5 also can realize similar effect.In this embodiment, extend obliquely about the longitudinal axis of nozzle tip in vertical hole 32.As shown in Figure 5, vertically the longitudinal axis that is denoted as " A ' " herein in hole 32 becomes to be different from zero angle beta extension with the longitudinal axis A of nozzle tip 3.
Naturally, also can make up mutually in conjunction with these three described measures of specific embodiments.
About fuel injection nozzle 1 according to the present invention,, then go back advantageous particularly if the path at valve seat 8 places has one during at least with same big regional of the flow section in vertical hole 31 in the open position of valve needle.This means in the open position of valve needle 7 to have and the vertical identical or bigger size of flow section in hole 32 at valve needle and flow section between the valve seat 8.Because vertically the flow section in hole 32 is greater than total flow section of all nozzle bores 31, therefore in the open position of valve needle 7, flow section just can be in the pressure chamber 6 downstream further increase.This means, cause the possibility that the flowing velocity of fuel reduces with regard to the increase of having got rid of owing to flow section.This point is very favourable in fuel injection nozzle, because reclaim way (diffusion effect) inefficiency of kinetic energy by widening flow section.
The manufacturing of the nozzle tip that fuel injection nozzle according to the present invention is used can use original all known processing methods to carry out.Vertically the manufacturing of hole 32, nozzle bore 31, cavetto section and widened section if desired 321 can utilize boring and/or carry out as the method for electrochemical machining of electrolytic machining and so on.
Claims (13)
1. fuel injection nozzle that combustion engine is used, have nozzle body (2) and be connected in nozzle tip (3) on the nozzle body (2), valve needle (7) places nozzle body (2) inside, wherein the end of valve needle and valve seat (8) cooperating is so that make when open position, valve needle (7) is opened a fuel passage on valve seat (8), when closed position, then close this path, vertically hole (32) extends through nozzle tip (3) and has flow diameter from valve seat (8), also has at least one nozzle bore (31), described at least one nozzle bore (31) begins to extend and fuel can enter the firing chamber (20) of combustion engine by described at least one nozzle bore (31) from vertical hole (32), described fuel injection nozzle is characterised in that vertically the length in hole (32) equals 17 at least with the ratio of the flow diameter in vertical hole (32).
2. fuel injection nozzle according to claim 1, wherein all nozzle bores have formed total flow diameter of fuel together, and wherein vertically the flow diameter in hole (32) is equivalent to 2 times of total flow diameter of all nozzle bores (31) at the most.
3. fuel injection nozzle according to claim 1 and 2, wherein vertically hole (32) has widened section (321) in the zone of nozzle bore (31).
4. fuel injection nozzle according to claim 3, wherein widened section (321) is formed asymmetrically with respect to the longitudinal axis of vertical hole (32).
5. fuel injection nozzle according to claim 3, the longitudinal axis (A) that wherein vertical hole (32) favours nozzle tip (3) extends.
6. fuel injection nozzle according to claim 1, wherein each nozzle bore (31) leads in vertical hole (32), and wherein said nozzle bore extends obliquely from described vertical hole along downward direction and forms angle greater than 90 ° with respect to vertical hole (32) axis.
7. fuel injection nozzle according to claim 1, the transition region between wherein vertical hole (32) and the nozzle bore (31) are rounding in all cases.
8. fuel injection nozzle according to claim 1, wherein in the open position of valve needle, the described fuel passage of valve seat place (8) has at least and the same big section area of the flow section of vertical hole (32).
9. fuel injection nozzle according to claim 1, wherein nozzle tip (3) is connected on the nozzle body (2) removably.
10. fuel injection nozzle according to claim 1, wherein vertically the ratio of the flow diameter in the length in hole (32) and vertical hole (32) equals 20 at least.
11. fuel injection nozzle according to claim 1, wherein the ratio of the flow diameter in the length in vertical hole (32) and vertical hole (32) is greater than 22.
12. fuel injection nozzle according to claim 2, wherein vertically the flow diameter in hole (32) is equivalent at least 0.5 times and 1.5 times at the most of total flow diameter of all nozzle bores (31).
13. a diesel engine has according to each described fuel injection nozzle (1) in the claim 1 to 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04405099 | 2004-02-23 | ||
| EP04405099.5 | 2004-02-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1661227A CN1661227A (en) | 2005-08-31 |
| CN100564865C true CN100564865C (en) | 2009-12-02 |
Family
ID=34932043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100519828A Expired - Fee Related CN100564865C (en) | 2004-02-23 | 2005-02-23 | Fuel injection nozzle |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1566539B1 (en) |
| JP (1) | JP2005240805A (en) |
| KR (1) | KR101264814B1 (en) |
| CN (1) | CN100564865C (en) |
| AT (1) | ATE421039T1 (en) |
| DE (1) | DE502005006448D1 (en) |
| DK (1) | DK1566539T3 (en) |
| PL (1) | PL1566539T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080006713A1 (en) * | 2006-07-06 | 2008-01-10 | Parish James R | Fuel injector having an internally mounted cross-flow nozzle for enhanced compressed natural gas jet spray |
| ATE483108T1 (en) * | 2007-08-31 | 2010-10-15 | Waertsilae Nsd Schweiz Ag | INJECTOR FOR INJECTING FUEL |
| CN101694199B (en) * | 2009-08-20 | 2011-05-11 | 余姚市舒春机械有限公司 | Nozzle of low-speed diesel engine |
| EP3267027A1 (en) * | 2016-07-07 | 2018-01-10 | Winterthur Gas & Diesel AG | Nozzle head for a fuel injection valve of a large diesel engine, and method for manufacturing same |
| DK181318B1 (en) * | 2022-02-18 | 2023-08-10 | Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland | A fuel valve for a large turbocharged two-stroke uniflow crosshead internal combustion engine |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE482591C (en) * | 1927-04-30 | 1930-02-03 | Werke Kiel Akt Ges Deutsche | Fuel injector for internal combustion engines |
| DE2948451A1 (en) * | 1979-12-01 | 1981-06-04 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injector for IC engine - has push rod upstream of valve determining cross=section of injection openings |
| DE3234829A1 (en) * | 1982-09-21 | 1984-03-22 | Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln | INJECTION DEVICE FOR A DIESEL ENGINE |
| CS249562B1 (en) * | 1983-08-23 | 1987-04-16 | Vaclav Rysan | Multi-opening injection jet |
| JPH0639095Y2 (en) * | 1988-03-09 | 1994-10-12 | 住友重機械工業株式会社 | Fuel injection nozzle for diesel engine |
| US5026462A (en) * | 1990-03-06 | 1991-06-25 | Ail Corporation | Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles |
| JPH10176631A (en) * | 1996-12-18 | 1998-06-30 | Nippon Soken Inc | Fuel injection valve |
| JPH11117830A (en) | 1997-10-20 | 1999-04-27 | Hitachi Ltd | Injector |
| DK1353061T3 (en) * | 2002-04-11 | 2008-06-23 | Waertsilae Nsd Schweiz Ag | Nozzle head for fuel injection nozzle |
| KR101307563B1 (en) | 2003-07-16 | 2013-09-12 | 베르트질레 슈바이츠 악티엔게젤샤프트 | Piston for a high pressure piston in cylinder unit |
-
2005
- 2005-01-25 DK DK05405036T patent/DK1566539T3/en active
- 2005-01-25 PL PL05405036T patent/PL1566539T3/en unknown
- 2005-01-25 EP EP05405036A patent/EP1566539B1/en not_active Not-in-force
- 2005-01-25 DE DE502005006448T patent/DE502005006448D1/en active Active
- 2005-01-25 AT AT05405036T patent/ATE421039T1/en not_active IP Right Cessation
- 2005-02-22 JP JP2005044914A patent/JP2005240805A/en active Pending
- 2005-02-22 KR KR1020050014480A patent/KR101264814B1/en not_active IP Right Cessation
- 2005-02-23 CN CNB2005100519828A patent/CN100564865C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE421039T1 (en) | 2009-01-15 |
| PL1566539T3 (en) | 2009-05-29 |
| EP1566539A1 (en) | 2005-08-24 |
| JP2005240805A (en) | 2005-09-08 |
| KR20060043061A (en) | 2006-05-15 |
| CN1661227A (en) | 2005-08-31 |
| KR101264814B1 (en) | 2013-05-15 |
| DE502005006448D1 (en) | 2009-03-05 |
| EP1566539B1 (en) | 2009-01-14 |
| DK1566539T3 (en) | 2009-04-14 |
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