EP1179134A1 - Einspritzdüse - Google Patents
EinspritzdüseInfo
- Publication number
- EP1179134A1 EP1179134A1 EP01915037A EP01915037A EP1179134A1 EP 1179134 A1 EP1179134 A1 EP 1179134A1 EP 01915037 A EP01915037 A EP 01915037A EP 01915037 A EP01915037 A EP 01915037A EP 1179134 A1 EP1179134 A1 EP 1179134A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- spray holes
- nozzle needle
- injection
- needle
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims description 46
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 5
- 238000004939 coking Methods 0.000 description 2
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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
Definitions
- the invention relates to a fuel injection nozzle with a nozzle body which has a first and a second group of spray holes, a first and a second nozzle needle and a separate pressure chamber for each nozzle needle, so that these are independent of one another between a closed position in which the spray holes assigned to the corresponding nozzle needle are closed and an injection position is adjustable in which the corresponding spray holes are open.
- the invention also relates to a method for operating a fuel injection nozzle.
- a fuel injection nozzle of the type mentioned is known.
- the spray holes of a group are each arranged along a circle, an inner circle and an outer circle concentric to this being formed.
- the nozzle needle assigned to the outer spray holes is designed as a hollow cylinder, and the nozzle needle assigned to the inner spray holes is arranged inside the hollow nozzle needle.
- a separating sleeve is arranged between the inner nozzle needle and the outer nozzle needle, which is acted upon by a compression spring in contact with a sealing seat in the nozzle body, which is formed between the two spray hole circles.
- the inner spray holes serve for pre-injection, while the outer spray holes are provided for main injection. In any case, the separating sleeve ensures se while opening the nozzle needles that the two groups of spray holes remain separate.
- a disadvantage of this known construction is the comparatively high construction cost. Since the spray holes of the two groups are very close together, both the two nozzle needles and the separating sleeve must be accommodated in a very small space.
- the object of the invention is to develop an injection nozzle of the type mentioned at the outset such that a simpler structure is achieved. Furthermore, flexible use of the two groups of spray holes is to be made possible by suitable control of the two nozzle needles. The object of the invention is also to provide a method for operating an injection nozzle of the type mentioned at the outset.
- the fuel injector with the features of claim 1 has the advantage that the separating sleeve or a similar sealing element between the two nozzle needles can be dispensed with.
- This structure is based on the knowledge that a sealing of the corresponding spray holes in one group can be reliably achieved even with the nozzle needle open for the spray holes in the other group, without the need for a separate seal.
- a stop chamber is provided for at least one of the nozzle needles, which is provided with a hydraulic connection.
- a hydraulic stroke stop is created for the corresponding nozzle needle, which limits the opening movement of the nozzle needle more gently than a conventional mechanical stroke stop. A longer service life of the nozzle needle is thus achieved.
- the method according to claim 8 offers the advantage that the various spray holes can be used for both the pre-injection and the main injection. In this way, a vario effect can be achieved, since the total cross-sectional area of the injection holes can be adapted to the respective injection by appropriately controlling one of the two nozzle needles or both nozzle needles.
- the other row of holes can be prevented from coking by suitable, possibly only brief switching to the other row of holes.
- the method according to claim 8 can in principle also be used in an injection nozzle in which a separating sleeve is provided between the two nozzle needles, which facilitates the sealing between the different rows of holes.
- FIG. 1 is a fuel injector according to the invention in cross section.
- FIG. 2 schematically shows a fuel injection system in which the injector of FIG. 1 is used.
- the injection nozzle 10 shown in FIG. 1 has a nozzle body 12 which is provided with two groups of spray holes 14, 16.
- the spray holes of each group are arranged along a circle, the two circles formed being are centric and the circle of the first spray holes 14 surrounds the circle formed by the second spray holes 16.
- a first nozzle needle 18 and a second nozzle needle 20 are arranged in the interior of the nozzle body.
- the first nozzle needle 18 has an annular cross section, that is to say it is hollow, and the second nozzle needle 20 is arranged inside the first nozzle needle 18.
- the first nozzle needle 18 interacts with the spray holes 14 of the first group
- the second nozzle needle 20 interacts with the spray holes 16 of the second group.
- Each nozzle needle lies against the nozzle body 12 in such a way that, viewed in the radial direction, sealing is carried out on the inside and the outside of the corresponding spray hole circle.
- the first nozzle needle 18 is provided with a collar 22 which bears against the nozzle body 12, so that a pressure chamber 24 is formed. This is provided with a fuel connection 26, so that the pressure chamber 24 can be pressurized.
- a stop chamber 27 is formed, in which a compression spring 28 is arranged. This is supported on the nozzle body 12 and acts on the first nozzle needle 18 against the nozzle body 12, so that the spray holes 14 are closed.
- the stop chamber 27 is provided with a hydraulic connection 30, by means of which the pressure prevailing in the stop chamber 27 can be varied.
- the second nozzle needle 20 is provided with a collar 32, so that a pressure chamber 34 is formed, which is provided with a fuel connection 36, and a stop chamber 37, in which a compression spring 38 is arranged and which is provided with a hydraulic connection 40 ,
- the injection nozzle 10 is connected to a fuel injection system. sen, which has a high pressure accumulator 42 for the fuel to be injected. From this supply lines 44, 46 lead to the fuel connections 26, 36, switchable valves 48, 50 being provided, by means of which the connection from the supply lines to the fuel connections can be opened and closed. Either 3/2-way valves or two 2/2-way valves each can be used.
- the first nozzle needle 18 opens as soon as the opening force generated in the pressure chamber 24 is greater than the closing force generated by the compression spring 28 and possibly the pressure in the stop chamber 27. Fuel can then be injected through the spray holes 14.
- the hydraulic stop chamber 27 enables a gentle limitation of the opening stroke of the first nozzle needle 18, which limitation can be variably controlled by a switchable valve which is assigned to the hydraulic connection 30.
- the second nozzle needle 20 can be opened by supplying fuel via the fuel connection 36.
- the fuel present in the pressure chamber 34 is then passed through a bore 52 in the interior of the second nozzle needle 20 to its front end, so that the fuel can escape through the spray holes 16.
- an annular gap could be used between the first nozzle needle 18 and the second nozzle needle 20, in which case a seal against the stop chamber 27 of the first nozzle needle would then have to be provided.
- the opening stroke of the second nozzle needle can also be variably controlled by the hydraulic stop chamber 37 and the hydraulic connection 40.
- the injection cross section can be freely selected with the described injection nozzle. Either one or the other group of spray holes 14, 16 or even both spray hole groups can be used at will. For example, both the pre and the main injection can be carried out at low load by opening the spray holes of a group, while for the Full load eb both spray hole groups can be used for injection at the same time.
- the present design creates an internal opening injection nozzle that allows free choice of spray cross-section with a small opening stroke of the corresponding nozzle needle with little construction.
- the stop chambers can also be designed without a hydraulic connection 40, so that there is a further simplified design.
- a separating sleeve can also be used between the two nozzle needles, which ensures the reliable seal between the two spray hole groups at high operating pressures.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10010863A DE10010863A1 (de) | 2000-03-06 | 2000-03-06 | Einspritzdüse |
| DE10010863 | 2000-03-06 | ||
| PCT/DE2001/000727 WO2001066932A1 (de) | 2000-03-06 | 2001-02-24 | Einspritzdüse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1179134A1 true EP1179134A1 (de) | 2002-02-13 |
| EP1179134B1 EP1179134B1 (de) | 2007-06-06 |
Family
ID=7633690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01915037A Expired - Lifetime EP1179134B1 (de) | 2000-03-06 | 2001-02-24 | Einspritzdüse |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6769634B2 (de) |
| EP (1) | EP1179134B1 (de) |
| JP (1) | JP2003526047A (de) |
| BR (1) | BR0104955A (de) |
| DE (2) | DE10010863A1 (de) |
| PL (1) | PL350628A1 (de) |
| WO (1) | WO2001066932A1 (de) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0021296D0 (en) * | 2000-08-30 | 2000-10-18 | Ricardo Consulting Eng | A dual mode fuel injector |
| US6725838B2 (en) * | 2001-10-09 | 2004-04-27 | Caterpillar Inc | Fuel injector having dual mode capabilities and engine using same |
| DE10163654A1 (de) * | 2001-12-21 | 2003-07-03 | Bosch Gmbh Robert | Kraftstoffeinspritzsystem für Brennkraftmaschinen |
| FR2840367B1 (fr) | 2002-06-04 | 2004-12-10 | Renault Sa | Injecteur de carburant pour moteur a combustion interne de vehicule automobile de type diesel |
| US6945475B2 (en) * | 2002-12-05 | 2005-09-20 | Caterpillar Inc | Dual mode fuel injection system and fuel injector for same |
| DE10261175A1 (de) * | 2002-12-20 | 2004-07-08 | Daimlerchrysler Ag | Schieberventil |
| DE10326045A1 (de) * | 2003-06-10 | 2004-12-30 | Robert Bosch Gmbh | Einspritzdüse für Brennkraftmaschinen |
| DE10348925A1 (de) * | 2003-10-18 | 2005-05-12 | Bosch Gmbh Robert | Kraftstoffinjektor mit mehrteiligem, direktgesteuertem Einspritzventilglied |
| DE10352504A1 (de) * | 2003-11-11 | 2005-06-02 | Robert Bosch Gmbh | Einspritzdüse |
| DE10358861A1 (de) * | 2003-12-16 | 2005-07-14 | Robert Bosch Gmbh | Einspritzdüse |
| DE102004015360A1 (de) * | 2004-03-30 | 2005-10-20 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| DE102004057244A1 (de) * | 2004-11-26 | 2006-06-01 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
| DE602005005159T2 (de) * | 2005-01-19 | 2009-04-30 | Delphi Technologies, Inc., Troy | Kraftstoffeinspritzventil |
| US20060196974A1 (en) * | 2005-03-01 | 2006-09-07 | Caterpillar Inc. | Fuel injector having a gradually restricted drain passageway |
| ATE439515T1 (de) * | 2005-04-28 | 2009-08-15 | Delphi Tech Inc | Einspritzdüse |
| EP2041424B1 (de) * | 2006-07-04 | 2011-09-14 | Renault Trucks | Düsenanordnung, kraftstoffeinspritzdüse und verbrennungsmotor mit solch einer einspritzdüse |
| JP4265645B2 (ja) * | 2006-11-07 | 2009-05-20 | トヨタ自動車株式会社 | 燃料噴射装置 |
| JP4331225B2 (ja) * | 2007-04-10 | 2009-09-16 | トヨタ自動車株式会社 | 内燃機関の燃料噴射制御装置 |
| ATE524649T1 (de) * | 2007-07-06 | 2011-09-15 | Delphi Tech Holding Sarl | Doppelsprüh-einspritzdüse |
| US7685990B2 (en) * | 2007-11-29 | 2010-03-30 | Delphi Technologies, Inc. | Dual mode combustion apparatus and method |
| FI124121B (fi) * | 2010-12-01 | 2014-03-31 | Wärtsilä Finland Oy | Polttomoottorin ohjausmenetelmä ja polttomoottori |
| FI20115418A0 (fi) * | 2011-05-03 | 2011-05-03 | Waertsilae Finland Oy | Polttoaineenruiskutusyksikkö ja-järjestelmä |
| EP2674608B1 (de) * | 2012-06-13 | 2015-08-12 | Delphi International Operations Luxembourg S.à r.l. | Kraftstoffeinspritzdüse |
| CN104533684B (zh) * | 2014-11-26 | 2017-07-28 | 中国北方发动机研究所(天津) | 一种双控制阀多密封带燃油喷嘴 |
| DE102016200237B4 (de) | 2016-01-12 | 2022-01-20 | Ford Global Technologies, Llc | Direkteinspritzende aufgeladene Brennkraftmaschine mit Wassereinspritzung und Verfahren zum Betreiben einer derartigen Brennkraftmaschine |
| NL1041770B1 (en) * | 2016-03-18 | 2017-10-03 | Cereus Tech B V | Improved fuel injection devices. |
| US10392987B2 (en) | 2017-03-29 | 2019-08-27 | Cummins Emission Solutions Inc. | Assembly and methods for NOx reducing reagent dosing with variable spray angle nozzle |
| PL248938B1 (pl) * | 2022-12-05 | 2026-02-16 | Progresja Spolka Akcyjna | Dysza do hydroinżekcji |
| JP2025077215A (ja) * | 2023-11-06 | 2025-05-19 | 三菱重工業株式会社 | 燃料噴射装置および往復動内燃機関 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647387B2 (de) * | 1974-08-20 | 1981-11-09 | ||
| DE2710216A1 (de) * | 1977-03-09 | 1978-09-14 | Bosch Gmbh Robert | Kraftstoffeinspritzduese |
| DE3036583A1 (de) * | 1980-09-27 | 1982-05-13 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzduese |
| JPS6036772A (ja) * | 1983-08-10 | 1985-02-25 | Diesel Kiki Co Ltd | 燃料噴射弁 |
| DE4115477C2 (de) * | 1990-05-17 | 2003-02-06 | Avl Verbrennungskraft Messtech | Einspritzdüse für eine Brennkraftmaschine |
| DE4023223A1 (de) * | 1990-07-21 | 1992-01-23 | Bosch Gmbh Robert | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
| DE4210563A1 (de) * | 1991-04-15 | 1992-10-22 | Volkswagen Ag | Kraftstoffeinspritzduese fuer eine mit vor- und haupteinspritzung arbeitende brennkraftmaschine |
| US5458292A (en) * | 1994-05-16 | 1995-10-17 | General Electric Company | Two-stage fuel injection nozzle |
| JPH07317624A (ja) * | 1994-05-21 | 1995-12-05 | Nippon Clean Engine Lab Co Ltd | 燃料噴射弁とそれによる先行噴射燃焼方式 |
| JPH07324661A (ja) * | 1994-05-30 | 1995-12-12 | Mitsubishi Motors Corp | 直接噴射式ディーゼルエンジンの燃料噴射方法及び燃料噴射ノズル |
| US5899389A (en) * | 1997-06-02 | 1999-05-04 | Cummins Engine Company, Inc. | Two stage fuel injector nozzle assembly |
| GB9916464D0 (en) * | 1999-07-14 | 1999-09-15 | Lucas Ind Plc | Fuel injector |
| GB9922408D0 (en) * | 1999-09-23 | 1999-11-24 | Lucas Ind Plc | Fuel injector |
| US6637675B2 (en) * | 2001-07-13 | 2003-10-28 | Cummins Inc. | Rate shaping fuel injector with limited throttling |
-
2000
- 2000-03-06 DE DE10010863A patent/DE10010863A1/de not_active Ceased
-
2001
- 2001-02-24 WO PCT/DE2001/000727 patent/WO2001066932A1/de not_active Ceased
- 2001-02-24 JP JP2001565523A patent/JP2003526047A/ja active Pending
- 2001-02-24 EP EP01915037A patent/EP1179134B1/de not_active Expired - Lifetime
- 2001-02-24 BR BR0104955-0A patent/BR0104955A/pt not_active Application Discontinuation
- 2001-02-24 DE DE50112588T patent/DE50112588D1/de not_active Expired - Lifetime
- 2001-02-24 PL PL01350628A patent/PL350628A1/xx unknown
- 2001-02-24 US US09/959,731 patent/US6769634B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0166932A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1179134B1 (de) | 2007-06-06 |
| US6769634B2 (en) | 2004-08-03 |
| WO2001066932A1 (de) | 2001-09-13 |
| US20030098371A1 (en) | 2003-05-29 |
| DE50112588D1 (de) | 2007-07-19 |
| PL350628A1 (en) | 2003-01-27 |
| JP2003526047A (ja) | 2003-09-02 |
| BR0104955A (pt) | 2002-02-19 |
| DE10010863A1 (de) | 2001-09-27 |
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