CN102725511A - Fuel injection nozzle for internal combustion engines - Google Patents
Fuel injection nozzle for internal combustion engines Download PDFInfo
- Publication number
- CN102725511A CN102725511A CN2010800535919A CN201080053591A CN102725511A CN 102725511 A CN102725511 A CN 102725511A CN 2010800535919 A CN2010800535919 A CN 2010800535919A CN 201080053591 A CN201080053591 A CN 201080053591A CN 102725511 A CN102725511 A CN 102725511A
- Authority
- CN
- China
- Prior art keywords
- bar portion
- pressure chamber
- portion section
- vertical hole
- section
- 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.)
- Granted
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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
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
-
- 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
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a fuel injection nozzle for internal combustion engines, in particular self-ignition-type internal combustion engines, comprises a nozzle needle (5) having a shank section (7) guided in a longitudinal bore (4) of the nozzle body (2), which shank section transitions into a constricted shank section (14) passing through a pressure chamber (9), wherein the transition between said shank sections is located within the longitudinal bore (4) spaced from the junction thereof into the pressure chamber (9).
Description
Technical field
What the present invention relates to a kind of preamble according to claim 1 is used for internal-combustion engine, the fuel injection nozzle of self-igniting internal combustion engine especially.
Background technique
In basic structure similarly jet blower, especially also the parts as sparger are known in different design proposals.
Therefore file DE 32 27 742 A1 have shown a kind of jet blower; Therein; The valve needle (Duesennadel) that guides with the bar portion section in vertical hole of guide way has bar portion section that on diameter, reduce, cylindricality and that run through the pressure chamber with being connected to this bar portion section place, and the fuel supplying part to the pressure chamber is axially realized distolateral.Distolateral in the pressure chamber equally, guide way is configured with " annular flange (the Ringkragen) " conduct of surrounding bar portion section to the convex shoulder (Ansatz) of the bar portion section that is guided that reduces on the diameter and is used to be supported on the helical spring guiding element guide way place, that on the direction of its closed position, axially load valve needle.
In addition, file EP 1 026 393 A2 have shown the jet blower that has the control volume that is connected to the nozzle body place as the part of sparger.The hole that is used for valve needle and pressure piston during heart is provided with and carries out the transition to each other in the axial direction in nozzle body and the control volume, pressure piston are arranged in control volume and are connected via push rod (Druckstange) with valve needle.Push rod runs through the pressure chamber; Fuel supply channel peripheral side, promptly the footpath upwards lead in the pressure chamber from the outside; That is make the open against each other zone of its fuel limitation supply passage and pressure chamber in the axial transition region between control volume and nozzle body like this; The axial bore that holds pressure piston leads on its part that belongs to control volume, in the closed position of the valve needle of the position that is used for being classified to dislocation with leading to adjoining of pressure piston.Through fuel supply channel radial oriented to the pressure chamber, should avoid realizing big high voltage intensity and fatigue strength in addition feeding mouthful notch stress at place, position.
In Fuelinjection nozzle according to file DE 196 11 884 A1; Nozzle body is configured with the pilot hole that is used for valve needle that ends in the pressure chamber equally; It has the bar portion section that in pilot hole, stretches, and it carries out the transition to the bar portion section that reduces at diameter with entering into the pressure chamber.Thus to pilot hole stop ground its with the bar of valve needle between produce doughnut that open, the crack shape facing to the pressure chamber.It is used for to the pressure chamber and valve needle acutangulates down and unload the wedge area between pilot hole and the fuel supply channel that is retained in of nozzle body thus adjacent to the fuel supply channel that gets into it, promptly the doughnut of crack shape, can set up corresponding reaction force from the pressure chamber for the pressure superposition ground that in fuel supply channel, expands.
Also in file EP 0 961 024 A1, it has shown that the fuel injection nozzle and the fuel supply therein that are used for two-stroke large diesel engine control via two nozzles in succession.Utilize its valve needle to control to spray second nozzle that has as far as possible little blind hole volume of opening and stop water clock thus in order to design, it is stepped that the valve needle of second nozzle becomes on diameter.The bar portion section bigger on the diameter of valve needle is arranged in pilot hole and carries out the transition to bar portion section less on diameter to the feeding zone in the pressure chamber at pilot hole.Fuel supply to the pressure chamber here also via stretch with valve needle with acutangulating and realize adjacent to feeding the fuel supply channel that the zone enters in the pressure chamber, make to produce adventurous and through the pressure-loaded of both sides wedge area to be unloaded.
Comparable relation also is present in from file JP 5813154 A in the conspicuous jet blower.
Fuel injection nozzle corresponding to the preamble of claim 1 in basic structure is for example known from file DE 39 38 551 A1.For high jet pressure (utilizing it to do work), such jet blower has cavitation erosion dangerous with increasing, especially under the situation of the local pressure reduction of structure.Relevant therewith key area is the transition region of bar that reduce at diameter, that run through the pressure chamber portion section from the bar portion section that vertical hole of nozzle body, leads of valve needle to it.The pressure reduction that interrelates with roughly radially the pressure shaft shoulder with the arching that is connected to its place of the bar portion section of constriction of flowing that is projected into part in the pressure chamber and produce corresponding to the bar portion section of guide section; Shown in practice; The zone that has caused low pressure, it can cause the cavitation erosion infringement the carrying out the transition to of bar portion section corresponding to guide section in the part on the pressure shaft shoulder.
From file DE 195 15 936 A1 about similar through-flow relation for the needle-valve of through-flow device-control gear follow the flow circulation of the spiral helicine or zigzag shape of realizing valve rod of the known tangential of bar section, constriction portion of the bar portion section that is guided through the pressure chamber so that avoid local pressure reduction to damage with the cavitation erosion of perhaps following thus.
Summary of the invention
The object of the invention is to propose a kind of structure for the fuel injection nozzle that starts the type of being mentioned, and utilizes it especially in the zone of the transition of the bar portion section of its constriction, can avoid the cavitation erosion infringement in the bar portion section that the guide section in vertical hole, leads from valve needle.
This utilizes the characteristic of claim 1 to realize.Dependent claims comprises suitable improvement project.
Consider the DESIGNED FEATURE and the size of regulation; From the guide section in vertical hole stop ground produce outwards limit diametrically, in the axial direction facing to open ring chamber, pressure chamber, can form therein balanced to a great extent about compression ratio at least, be in respect to the fluid ring on the lower level of the pressure peak in the pressure chamber.
It has caused from the pressure chamber in the bar portion section of valve needle and the vertical pressure transition gradually of the annular space the guide section in hole.Therefore; Produced the certain protection function; Prevent on the one hand the formation of bubble in the transition from the pressure chamber to the annular space and in the annular space, and on the other hand when valve needle is opened, also about the internal rupture (Implosion) that cavitation erosion damages that causes of the bubble that overflows from the annular space.Therefore; At first the formation of bubble is reduced at least; And, thereby produce near the internal rupture the wall hardly in doughnut on the other hand for the bubble that when valve needle is opened, spills on the doughnut from the annular space also provides than fluid displacement bigger the annular space., reduce also importantly in the pressure drop of generation on the direction of annular space for the infringement of avoiding at least to a great extent cavitating corresponding to the cross section of doughnut to annular space with stretching.
This cross section reduce through little, be that 70 ° cone angle is confirmed corresponding to the bar portion section of the spacing of the adjacent end of the bar portion section that is guided of transition part to the valve needle 1/3rd, on from the guide section in vertical hole to the pressure chamber of the diameter in vertical hole and constriction.In addition, through with the mode of the waist that radially is covered in the necking section fuel supplying part to the pressure chamber,, can be implemented in reducing of pressure reduction in the pressure chamber because also combine thus with the asymmetrical mobile phase of valve needle.Realize under the situation of the nozzle arrangements that reduces significantly or prolong of the length of the bar portion section that such design proposal can guide not having.
Description of drawings
Other details of the present invention and characteristic draw from specification, claim and accompanying drawing.Wherein:
Fig. 1 shows the cross section through fuel injection nozzle with the diagram of simplifying, and
Fig. 2 show with the diagram of amplifying valve needle bar on blind hole, end at the portion's section on the needle point from waist.
Embodiment
Part in Fig. 1 in the pressure chamber that is ejected into unshowned internal-combustion engine of the schematically illustrated jet blower 1 that is used for fuel (especially diesel fuel), it especially also can be the constituent element of fuel injector.Jet blower 1 has nozzle body 2, and it has the vertical hole 4 that on the direction of its longitudinal axis 3, stretches, and it has portion's section of different-diameter.Vertically hole 4 holds valve needle 5 and ends on the injection opening 6 in the end of combustion chamber side that is arranged on nozzle body 2.
Valve needle 5 has the bar portion section 7 that is provided with fine groove (Mikrorille) in case of necessity, utilizes it, it in the guide section 8 in vertical hole 4 of nozzle body 2 on the direction of longitudinal axis 3 axially-displaceable guide movingly.These guide section 8 pass-outs to vertical hole 4 in diameter, enlarge and be configured on the part of pressure chamber 9, be connected with another section 10 in vertical hole 4 at Qi Chu, it sprays on the opening 6 ending at gradually on the supporting surface 11 of hole side taper.
The fuel supply channel that utilizes 12 marks axially to stretch; Its diametrically pass-out to pressure chamber 9; Wherein, Fuel supply feeds openings 13 via two in the present embodiment and asymmetricly is implemented in the pressure chamber 9, the bar portion section 7 that it is guided by being connected to of valve needle 5 and diametrically the bar portion section 14 of constriction run through.Bar portion section 14 places in the constriction that upwards stretches in walking of longitudinal axis 3 are connected with another bar portion section 15; It reduces and its periphery restriction doughnut 16 to vertical hole 4 with respect to bar portion section 7 on diameter; Via it in the fuel supply that on the direction of the supporting surface 11 of nozzle body 2, realizes pressure chamber 9; For it, valve needle 5 has corresponding sealing surface 18 adjacent to its nozzle needle point 17.
For the valve needle that is arranged in closed position 5, block via face 11 and 18 against each other to the fuel input of spraying on the opening 6.If valve needle 5 is lifted from its seat, fuel is injected on the corresponding firing chamber via spraying opening 6 so, in the zone of the waist 19 of the bar portion section 14 of constriction, supplies to pressure chamber 9 last times via feeding opening 13 at fuel.Waist 19 is in to be covered in diametrically and feeds opening 13; Its periphery about pressure chamber 9 asymmetricly is misplaced in longitudinal axis 3 ground and in week and upwards arranges each other with being misplaced, makes by on the peripheral edge margin of pressure chamber 9, producing the zone that is in the different pressures level, at least with flowing decision.This can be at the structure that causes cavitation erosion vesicle in corresponding pressure reduction zone under the pressure reduction of correspondence, and it is in the damage that in the zone of higher pressure, can cause corresponding surface under near the situation of the internal rupture the wall.Such damage is crucial in the bar portion section 7 that in vertical hole 4, is guided of valve needle 5 especially, especially when it occurs at valve needle 5 places.
According to the present invention; This zone cavitation erosion infringement protection is at least significantly realized thus; The bar portion section 7 that promptly in vertical hole 4 of nozzle body 2, is guided stops to the pressure chamber 9 that enlarges diametrically with respect to vertical hole 4 with the feeding mouth in vertical hole 4 at intervals; The bar portion section 7 that promptly in vertical hole 4, is guided with to the intermediate location between the bar portion section 14 of this constriction before the feeding mouth of the guide section 8 in vertical hole 4, and therefore in the guide section 8 in vertical hole 4.9 be surrounded on attachment areas generation doughnut 20, especially the level land leg-of-mutton doughnut 20 of the bar portion section 14 of constriction from the pressure chamber thus to the bar portion section 7 that is guided to guide section 8 with getting into.On the function; Since gradually, avoid or reduce at least pressure jump from pressure chamber 9 to the annular space bar portion section 7 and the guide section 8 on the fluid ring that doughnut 20, forms of cross section transition part can be regarded as and prevent at generation in the transition part of annular space and in the annular space cavitate " guard ring " of vesicle; It also allows for the required free space of its internal rupture possible in the zone away from wall for the bubble that when valve needle is opened, from the annular space, overflows, thereby avoids the cavitation erosion infringement at the jet stem place at least to a great extent.
Set forth according to effect of the present invention although be based in part on theoretic consideration, that structure according to the present invention in practice turns out to be objectives guide and turn out to be and be suitable for avoiding at least basically the cavitation erosion infringement in the zone of being mentioned.
When the spacing 21 of the bar portion section that is guided of valve needle 57 and the transition part of vertical hole 4 to pressure chamber 9 of nozzle body 2 during corresponding to the diameter 22 of the guide section 8 of nozzle body 2 a part of, it is suitable and enough in scope of the present invention, to turn out to be.A preferred sizes ratio is, spacing 21 be of a size of vertical hole 3 diameter 22 1/3rd.This combines with cone angle 24 in 70 ° scope, thereby produces the suitable flat cross section of ratio of leg-of-mutton doughnut 20.
Especially combine with such dimension scale; Bar portion section 14 for constriction; It is suitable that waist diameter 23 turns out to be; It is greater than the vertical half the diameter of the guide section that is arranged in nozzle body 2 in hole 4, and especially be vertical hole guide section 8 diameter 22 2/3rds, and so also be the bar portion section 7 that guided diameter 2/3rds.
In diagram according to the amplification that ends at the part on the nozzle needle point 17 of the valve needle 5 of Fig. 2, be complemented at according to the diagram of Fig. 1 and employed there reference character and to this explanation, shown zone around nozzle needle point 17.Therefore explanation; Corresponding to the supporting surface 11 at nozzle body 2 places, the sealing surface 18 of needle-valve side be connected to bar portion section 15 places, facing to taper, frustum of a cone shape gradually annular region 25 of nozzle needle point 17 and nozzle needle point 17 between; Wherein, For the annular region 25 of frustum of a cone shape, the sealing surface 18 and the nozzle needle point 17 of annular have been stipulated corresponding cone angle 26 to 28.Its cone angle 26 from nozzle needle point 17 in its corresponding Angular Dimension begins to reduce; Wherein, Preferred value for the cone angle 26 of nozzle needle point 17 is 120 °, is 90 ° for the cone angle 27 of sealing surface 18, and is 75 ° for the cone angle 28 (as so-called advance angle) of annular region 25.This with according to the design proposal of the jet blower of Fig. 1 (therein, vertically the bar portion that the holds section 15 in hole, around the bar portion section 10 of doughnut 16 the height of annular region 25 stop and facing to annular region 25 constriction, especially with ladder) stop in combination.The fuel of supplying with via doughnut 16 therefore in the height of annular region 25 via given to nozzle body 2 and be introduced in the blind hole in the annular space, annular space and the nozzle needle point 17 between supporting surface 11 and sealing surface 18 of taper gradually towards the supporting surface 11 of nozzle body 2, nozzle opening 6 is from its.Be used for making the good control of flowing relation become possibility via the transition part that stretches that doughnut 16 is realized steppedly to the fuel supply of blind hole.
List of numerals
1 jet blower
2 nozzle bodies
3 longitudinal axis
4 vertical holes
5 valve needles
6 spray opening
7 bar portion sections
8 guide section
9 pressure chambers
10 sections
11 supporting surfaces
12 fuel supply channels
13 feed opening
14 bar portion sections
15 bar portion sections
16 doughnuts
17 nozzle needle points
18 sealing surfaces
19 waists
20 doughnuts
21 spacings
22 diameters
23 waist diameters
24 cone angles
25 annular regions
26 cone angles
27 cone angles
28 cone angles.
Claims (3)
1. one kind is used for internal-combustion engine, the fuel injection nozzle of self-igniting internal combustion engine especially; It has and holds vertical hole (4) valve needle (5), that in nozzle body (2), stretch; (8)s ended at least one and spray opening (6) in the zone that is extended to pressure chamber (9) from the guide section that is used for said valve needle (5) in said vertical hole (4); Wherein, Bar portion section (7) corresponding with said guide section (8), that guided that said valve needle (5) has bridges to the bar portion section (14) that the rod member (15) that ends on the nozzle needle stand is connected with the constriction that in diameter, stretches to its place, and it runs through pressure chamber (9); At least one fuel supplying part (12) peripheral side asymmetricly pass-out to the said pressure chamber (9)
It is characterized in that,
The bar portion section of the guide section that is arranged in said nozzle body (2) (8) of said valve needle (5); About its closed position; To stop in said vertical hole (4) to the transition part certain spacing in the said pressure chamber (9) with said vertical hole (4); Said spacing be said vertical hole (4) diameter (22) 1/3rd; And the bar portion section (14) that the bar portion section (14) of said constriction is received said guiding at about 70 ° cone angle (24) second line of a couplet is located, wherein, said fuel supplying part (12) with the mode pass-out of the waist (19) of the bar portion section (14) that radially is covered in said constriction to said pressure chamber (9).
2. fuel injection nozzle according to claim 1,
It is characterized in that,
The diameter (23) of the waist (19) of the bar portion section (14) of said constriction is greater than the half the diameter (22) in said vertical hole (4).
3. according to each described fuel injection nozzle in the aforementioned claim,
It is characterized in that,
The diameter (23) of the waist (19) of the bar portion section (14) of said constriction be said vertical hole (4) diameter (22) 2/3rds.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009054441A DE102009054441A1 (en) | 2009-11-25 | 2009-11-25 | Fuel injection nozzle for internal combustion engines |
| DE102009054441.0 | 2009-11-25 | ||
| PCT/EP2010/007086 WO2011063929A1 (en) | 2009-11-25 | 2010-11-23 | Fuel injection nozzle for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102725511A true CN102725511A (en) | 2012-10-10 |
| CN102725511B CN102725511B (en) | 2015-10-07 |
Family
ID=43558366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080053591.9A Active CN102725511B (en) | 2009-11-25 | 2010-11-23 | For the fuel injection nozzle of internal-combustion engine |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2504561B1 (en) |
| KR (1) | KR101682346B1 (en) |
| CN (1) | CN102725511B (en) |
| DE (1) | DE102009054441A1 (en) |
| DK (1) | DK2504561T3 (en) |
| WO (1) | WO2011063929A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2669504A1 (en) | 2012-05-30 | 2013-12-04 | Caterpillar Motoren GmbH & Co. KG | Plunger for an internal combustion engine fuel pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511443A (en) * | 1967-05-23 | 1970-05-12 | Cav Ltd | Liquid fuel injection nozzle units |
| US3806041A (en) * | 1972-04-24 | 1974-04-23 | Stanadyne Inc | Fuel injector |
| US4168804A (en) * | 1977-03-16 | 1979-09-25 | Robert Bosch Gmbh | Fuel injection nozzle for internal combustion engines |
| JPS5813154A (en) * | 1981-07-16 | 1983-01-25 | Katsunobu Kano | Injection nozzle for diesel engine |
| DE3938551A1 (en) * | 1989-11-21 | 1991-05-23 | Bosch Gmbh Robert | IC engine fuel injection nozzle - has longitudinal groove in needle valve stem, delivering fuel to seat |
| US5167370A (en) * | 1989-11-15 | 1992-12-01 | Man Nutzfahrzeuge Ag | Method and device for the intermittent injection of fuel into the combustion chamber of a combustion engine |
| JPH07310854A (en) * | 1994-05-02 | 1995-11-28 | Caterpillar Inc | Method and equipment for reducing cavitation and dynamic unbalance in hydraulic valve |
| DE19611884A1 (en) * | 1996-03-26 | 1997-10-02 | Bosch Gmbh Robert | Fuel injection valve for IC engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT378242B (en) * | 1981-07-31 | 1985-07-10 | Berchtold Max Prof | FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES, ESPECIALLY DIESEL ENGINES |
| US4987887A (en) * | 1990-03-28 | 1991-01-29 | Stanadyne Automotive Corp. | Fuel injector method and apparatus |
| EP0961024B1 (en) * | 1998-05-29 | 2010-01-13 | Wärtsilä Schweiz AG | Fuel injection nozzle |
| DE19904720C2 (en) * | 1999-02-05 | 2003-01-16 | Siemens Ag | Injector for an injection system of an internal combustion engine |
| DE10115215A1 (en) * | 2001-03-28 | 2002-10-10 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| JP2005113889A (en) * | 2003-10-10 | 2005-04-28 | Denso Corp | Fuel injection nozzle |
-
2009
- 2009-11-25 DE DE102009054441A patent/DE102009054441A1/en not_active Withdrawn
-
2010
- 2010-11-23 KR KR1020127016522A patent/KR101682346B1/en active IP Right Grant
- 2010-11-23 WO PCT/EP2010/007086 patent/WO2011063929A1/en active Application Filing
- 2010-11-23 DK DK10781443T patent/DK2504561T3/en active
- 2010-11-23 EP EP10781443.6A patent/EP2504561B1/en active Active
- 2010-11-23 CN CN201080053591.9A patent/CN102725511B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511443A (en) * | 1967-05-23 | 1970-05-12 | Cav Ltd | Liquid fuel injection nozzle units |
| US3806041A (en) * | 1972-04-24 | 1974-04-23 | Stanadyne Inc | Fuel injector |
| US4168804A (en) * | 1977-03-16 | 1979-09-25 | Robert Bosch Gmbh | Fuel injection nozzle for internal combustion engines |
| JPS5813154A (en) * | 1981-07-16 | 1983-01-25 | Katsunobu Kano | Injection nozzle for diesel engine |
| US5167370A (en) * | 1989-11-15 | 1992-12-01 | Man Nutzfahrzeuge Ag | Method and device for the intermittent injection of fuel into the combustion chamber of a combustion engine |
| DE3938551A1 (en) * | 1989-11-21 | 1991-05-23 | Bosch Gmbh Robert | IC engine fuel injection nozzle - has longitudinal groove in needle valve stem, delivering fuel to seat |
| JPH07310854A (en) * | 1994-05-02 | 1995-11-28 | Caterpillar Inc | Method and equipment for reducing cavitation and dynamic unbalance in hydraulic valve |
| DE19611884A1 (en) * | 1996-03-26 | 1997-10-02 | Bosch Gmbh Robert | Fuel injection valve for IC engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2504561B1 (en) | 2015-01-14 |
| WO2011063929A1 (en) | 2011-06-03 |
| DE102009054441A1 (en) | 2011-06-30 |
| CN102725511B (en) | 2015-10-07 |
| EP2504561A1 (en) | 2012-10-03 |
| KR20120086738A (en) | 2012-08-03 |
| KR101682346B1 (en) | 2016-12-05 |
| DK2504561T3 (en) | 2015-04-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |