EP1163442B1 - Kraftstoff-einspritzdüse - Google Patents
Kraftstoff-einspritzdüse Download PDFInfo
- Publication number
- EP1163442B1 EP1163442B1 EP01903592A EP01903592A EP1163442B1 EP 1163442 B1 EP1163442 B1 EP 1163442B1 EP 01903592 A EP01903592 A EP 01903592A EP 01903592 A EP01903592 A EP 01903592A EP 1163442 B1 EP1163442 B1 EP 1163442B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- injection nozzle
- sealing seat
- injection
- circumferential groove
- 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 - Lifetime
Links
Images
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
-
- 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
Definitions
- the invention relates to a fuel injector with a nozzle body, with is provided at least one injection hole and a conical bearing surface, and a nozzle needle slidable in the nozzle body and an inlet surface has downstream and downstream of the inlet surface a radial Paragraph, so that at the transition to the inlet surface a sealing seat is formed, which can interact with the contact surface
- Such a fuel injection nozzle is known from DE 195 47 423 A1.
- a depth of the order of 0 01 to 0.06 mm is executed, serves a sharp-edged Querschmttsübergang To produce in the region of the sealing seat, so that when the nozzle needle is open resulting flow area is defined as precisely as possible.
- make up the areas downstream of the paragraph downstream of the nozzle needle at a small opening stroke, as he made for a Voreinspntzung is, a comparatively long flow channel, which acts as a throttle and at the inevitable manufacturing tolerances have a big impact on the Have flow.
- Spattgeometne one Temperature-dependent laminar flow from what the flow behavior in addition impaired.
- a fuel injector according to the preamble of Claim 1 is known from US-A-5 890 660.
- the object of the invention is then an injection nozzle of the aforementioned Art to further develop that even with the smallest opening strokes a reliable dosage of the amount of fuel to be injected is possible, as is necessary for a pilot injection.
- a fuel injection nozzle of the type mentioned, which features having the characterizing part of claim 1, has the advantage that due to the circumferential groove such a large flow area downstream is formed of the sealing seat, that the self-adjusting flow in the open State of the nozzle needle, as it corresponds to a pilot injection, exclusively is determined by the cross section in the region of the sealing seat.
- the radial Sales is very sharp-edged, have manufacturing tolerances This site has negligible effects on itself in the open state the nozzle needle resulting flow area.
- FIG. 1 shows the front section of an injection nozzle, that is to say the section the combustion chamber of an internal combustion engine to be supplied is facing.
- the injection nozzle has a nozzle body 10 which is provided in the region of its front end with several injection holes 12. On the inside of the nozzle body 10 with a conical contact surface 14th provided, which has a cone angle ⁇ of about 60 °.
- a nozzle needle 16 is arranged between the a closed position in which no fuel from a (not shown) Fuel supply to the spray holes 12 can flow, and an open Adjustable position in which the injection of fuel is possible.
- an open Adjustable position in which the injection of fuel is possible.
- the opening stroke can be controlled so that the injected Fuel quantity is adapted to the particular requirements.
- a small O réelleshub possible, so that only a small amount of fuel is injected to achieve a pre-injection, as well as the actual Opening stroke, which causes a larger amount of fuel injected so that a main combustion takes place.
- the nozzle needle 16 has an inlet surface 18, which in the embodiment shown is designed as a conical surface.
- the outer contour of the inlet surface When viewed in section from FIG. 1, it closes at an angle ⁇ of approximately 22.5 ° with FIG Center axis M of the injector. Notwithstanding the embodiment shown For the angle ⁇ could also deviating values between 0 ° and 45 ° to get voted.
- a radial shoulder 20 At the inlet surface 18 closes downstream, ie to the spray holes 12th towards, a radial shoulder 20, so that a sharp-edged sealing seat 22 is formed.
- the paragraph 20 is designed so that a tangent to its contour (considered in the section of Figure 1) in the region of the transition to the inlet surface 18, ie in the region of the sealing seat 22 in the embodiment shown vertically to the central axis M of Etnspntzduse.
- the sealing seat 22 should be less sharp-edged, so with a included angle between the tangent to the radial shoulder in the area the sealing seat and the inlet surface 18 of less than 112, 5 ° or when the inclination angle ⁇ of the inlet surface 18 is smaller than the 22.5 ° shown,
- the tangent to the radial shoulder adjacent to the seal seat 22 may also be include a smaller angle than 90 ° with the central axis M, so obliquely down to the center axis M out to the desired sharp-edged
- the angle should be between the tangent to the Paragraph is enclosed adjacent to the sealing seat 22 and the central axis M, not less than 45 °.
- the radial shoulder 20 is designed on its stromabwartigen side so that a tangent to its contour (viewed again in the section of Figure 1) in parallel to the center axis M is.
- a circumferential groove closes 24 which forms a flow-through gap to the injection holes 12 at the contour indicated by A in Figure 1, the circumferential groove 24 extends exactly to the inlet in the spray holes.
- the circumferential groove 24 extends to the center of the injection holes 12, and in the Figure 1 designated C contour, the circumferential groove 24 extends completely over the spray holes.
- the extent of the circumferential groove 24 in the axial direction that is, for example, accordingly one of the contours A, B or C represents a compromise between the flow area in the region of the circumferential groove, which should be as large as possible and with regard to the HC values of the supplied internal combustion engine harmful volume, which is formed by the circumferential groove and possible should be small.
- the sealing seat 22 is lifted off the abutment surface 14. Since adjoining the sealing seat 22 of the radial shoulder 20 and the circumferential groove 24, the narrowest flow area is formed by the sealing seat 22; the downstream of the sealing seat 22 subsequent flow area are all larger. Due to the sharp-edged geometry used for the seal seat 22, the unavoidable manufacturing tolerances have a comparatively gennge effect on the resulting flow area.
- the resulting flow area A is a function of the needle stroke s shown.
- the reference numeral 22 is the course of the flow area referred to, resulting from the sealing seat 22.
- With the reference number 14 is the flow area designated, due to the downstream of the sealing seat 22 lying areas of the nozzle needle and the Contact surface results.
- the reference numeral 12 is finally the flow area referred to, which is determined by the spray holes 12.
- the nozzle needle performs only a small opening stroke V, as used for a Voreinspntzung, the resulting flow area is determined exclusively by the sealing seat 22. Only when a larger opening stroke is performed, first results in a flow area, which is no longer determined by the sealing seat 22, but by the contact surface 14 and the inlet to the spray holes. This is followed by an even larger opening stroke of the nozzle needle, a region in which the flow area is constant and is determined solely by the cross section of Spntzlocher 12. This range continues until the maximum opening stroke s max of the nozzle needle, which is on the order of 0.2 to 0.3 mm.
- the geometry of the nozzle needle according to the invention has no influence on the two last-mentioned areas since it has an effect only on opening strokes as used for pre-injection.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Figur 1 einen Querschnitt durch das vordere Ende einer Einspritzdüse; und
- Figur 2 ein Diagramm des Öffnungsquerschnittes zwischen Düsennadel und Dusenkörper in Abhängigkeit vom Hub der Dusennadel
Claims (4)
- Kraftstoff-Einspritzduse mit einem Düsenkörper (10), der mit mindestens einem Spritzloch (12) sowie einer kegeligen Anlagefläche (14) versehen ist, und einer Dusennadel (16), die in dem Düsenkorper verschiebbar ist und eine Einlauffläche (18) aufweist sowie stromabwärts anschließend an die Einlaufflache einen radialen Absatz (20), so daß am Übergang zur Einlauffläche ein Dichtsitz gebildet ist, der mit der Anlagefläche zusammenwirken kann, wobei
ein Winkel, der von einer Tangente an den radialen Absatz im Bereich des Dichtsitzes und der Mittelachse der Einspritzdüse eingeschlossen ist, mehr als 45° beträgt, dadurch gekennzeichnet, daß stromabwärts anschließend an den radialen Absatz eine Umfangsnut (24) gebildet ist, die sich axial bis mindestens zu dem Spritzloch (12) erstreckt, so daß bei einem Öffnungshub der Düsennadel zum Zwecke der Voreinspritzung der engste Querschnitt zwischen der Düsennadel und dem Düsenkorper im Bereich des Dichtsitzes gebildet ist - Einspritzdüse nach Anspruch 1 dadurch gekennzeichnet, daß sich die Umfangsnut (24) bis zur Mitte des Spntzloches (12) erstreckt.
- Einspritzdüse nach Anspruch 1, dadurch gekennzeichnet, daß sich die Umfangsnut (24) über das gesamte Spntzloch (12) erstreckt.
- Einspritzdüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der zwischen der Tangente an den radialen Absatz (20) und der Mittelachse M der Einspritzdüse eingeschlossene Winkel etwa 90° beträgt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10000574A DE10000574A1 (de) | 2000-01-10 | 2000-01-10 | Kraftstoff-Einspritzdüse |
DE10000574 | 2000-01-10 | ||
PCT/DE2001/000016 WO2001051806A1 (de) | 2000-01-10 | 2001-01-05 | Kraftstoff-einspritzdüse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1163442A1 EP1163442A1 (de) | 2001-12-19 |
EP1163442B1 true EP1163442B1 (de) | 2005-07-06 |
Family
ID=7627024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01903592A Expired - Lifetime EP1163442B1 (de) | 2000-01-10 | 2001-01-05 | Kraftstoff-einspritzdüse |
Country Status (9)
Country | Link |
---|---|
US (1) | US20030057299A1 (de) |
EP (1) | EP1163442B1 (de) |
JP (1) | JP2003519758A (de) |
KR (1) | KR20010102515A (de) |
CN (1) | CN1188591C (de) |
BR (1) | BR0103895A (de) |
DE (2) | DE10000574A1 (de) |
PL (1) | PL349996A1 (de) |
WO (1) | WO2001051806A1 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10245573A1 (de) * | 2002-09-27 | 2004-04-08 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE10246693A1 (de) * | 2002-10-07 | 2004-04-15 | Siemens Ag | Einspritzvorrichtung zum Einspritzen von Kraftstoff |
KR20040038080A (ko) * | 2002-10-31 | 2004-05-08 | 현대자동차주식회사 | 커먼레일 엔진용 인젝터 |
DE10251014A1 (de) * | 2002-11-02 | 2004-05-19 | Robert Bosch Gmbh | Kraftstoffzumesseinheit für Kraftstoffeinspritzanlagen von Brennkraftmaschinen |
DE10305303A1 (de) * | 2003-02-10 | 2004-08-19 | Robert Bosch Gmbh | Kraftstoff-Einspritzvorrichtung, insbesondere für Brennkraftmaschinen mit Kraftstoff-Direkteinspritzung |
DE102005025135A1 (de) * | 2005-06-01 | 2006-12-07 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
US7578450B2 (en) * | 2005-08-25 | 2009-08-25 | Caterpillar Inc. | Fuel injector with grooved check member |
US7360722B2 (en) * | 2005-08-25 | 2008-04-22 | Caterpillar Inc. | Fuel injector with grooved check member |
US20070200011A1 (en) * | 2006-02-28 | 2007-08-30 | Caterpillar Inc. | Fuel injector having nozzle member with annular groove |
GB0625770D0 (en) * | 2006-12-22 | 2007-02-07 | Delphi Tech Inc | Fuel injector for an internal combustion engine |
DE102009042155A1 (de) * | 2009-09-21 | 2011-04-07 | Continental Automotive Gmbh | Kraftstoff-Einspritzventil für eine Brennkraftmaschine |
EP2439447A1 (de) * | 2010-10-05 | 2012-04-11 | Siemens Aktiengesellschaft | Brennstoffdüse, Gasturbinenbrennkammer und Brenner mit einer solchen Brennstoffdüse |
WO2012085901A2 (en) | 2011-05-09 | 2012-06-28 | Lietuvietis Vilis I | Valve covered orifice pressure equalizing channel |
DE102012218016A1 (de) * | 2012-10-02 | 2014-04-03 | Continental Automotive Gmbh | Düsenbaugruppe für ein Einspritzventil und Einspritzventil |
CN103277225A (zh) * | 2013-06-07 | 2013-09-04 | 苏州柏德纳科技有限公司 | 一种喷油嘴 |
CN103742778B (zh) * | 2014-01-09 | 2016-08-24 | 四川宁江山川机械有限责任公司 | 一种注油机注油嘴的改进结构 |
JP6354519B2 (ja) * | 2014-10-23 | 2018-07-11 | 株式会社デンソー | 燃料噴射弁 |
CN104612875A (zh) * | 2014-12-02 | 2015-05-13 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 一种新型大流量共轨喷油器喷油嘴偶件 |
DE102016215637A1 (de) * | 2016-08-19 | 2018-02-22 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
CN106762303B (zh) * | 2016-12-15 | 2019-08-27 | 江苏大学 | 一种控制商用车用柴油机小油量时喷射稳定性用孔式喷油嘴 |
DE102019210551A1 (de) * | 2019-07-17 | 2021-01-21 | Robert Bosch Gmbh | Kraftstoffinjektor |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54901Y2 (de) * | 1975-05-22 | 1979-01-17 | ||
DE2710217A1 (de) * | 1977-03-09 | 1978-09-14 | Bosch Gmbh Robert | Kraftstoffeinspritzduese |
JP2765178B2 (ja) * | 1990-04-11 | 1998-06-11 | 株式会社デンソー | 燃料噴射ノズル |
JP2841768B2 (ja) * | 1990-07-23 | 1998-12-24 | 日産自動車株式会社 | ディーゼル機関用燃料噴射ノズル |
JP2841770B2 (ja) * | 1990-07-26 | 1998-12-24 | 日産自動車株式会社 | ディーゼル機関用燃料噴射ノズル |
JPH04318277A (ja) * | 1991-04-17 | 1992-11-09 | Nissan Motor Co Ltd | 燃料噴射ノズル |
JPH0583369U (ja) * | 1992-04-20 | 1993-11-12 | 日産ディーゼル工業株式会社 | 燃料噴射ノズル |
GB9425652D0 (en) * | 1994-12-20 | 1995-02-22 | Lucas Ind Plc | Fuel injection nozzle |
DE19547423B4 (de) | 1995-12-19 | 2008-09-18 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
JPH10196492A (ja) * | 1997-01-13 | 1998-07-28 | Isuzu Motors Ltd | ディーゼルエンジン |
DE19820513A1 (de) * | 1998-05-08 | 1999-11-11 | Mtu Friedrichshafen Gmbh | Kraftstoffeinspritzdüse für eine Brennkraftmaschine |
-
2000
- 2000-01-10 DE DE10000574A patent/DE10000574A1/de not_active Withdrawn
-
2001
- 2001-01-05 KR KR1020017011329A patent/KR20010102515A/ko not_active Application Discontinuation
- 2001-01-05 JP JP2001551985A patent/JP2003519758A/ja active Pending
- 2001-01-05 WO PCT/DE2001/000016 patent/WO2001051806A1/de not_active Application Discontinuation
- 2001-01-05 BR BR0103895-8A patent/BR0103895A/pt active Search and Examination
- 2001-01-05 CN CNB018000479A patent/CN1188591C/zh not_active Expired - Fee Related
- 2001-01-05 EP EP01903592A patent/EP1163442B1/de not_active Expired - Lifetime
- 2001-01-05 US US09/936,217 patent/US20030057299A1/en not_active Abandoned
- 2001-01-05 DE DE50106669T patent/DE50106669D1/de not_active Expired - Lifetime
- 2001-01-05 PL PL01349996A patent/PL349996A1/xx unknown
Also Published As
Publication number | Publication date |
---|---|
WO2001051806A1 (de) | 2001-07-19 |
BR0103895A (pt) | 2001-12-18 |
CN1358256A (zh) | 2002-07-10 |
JP2003519758A (ja) | 2003-06-24 |
DE50106669D1 (de) | 2005-08-11 |
KR20010102515A (ko) | 2001-11-15 |
CN1188591C (zh) | 2005-02-09 |
EP1163442A1 (de) | 2001-12-19 |
PL349996A1 (en) | 2002-10-21 |
DE10000574A1 (de) | 2001-07-19 |
US20030057299A1 (en) | 2003-03-27 |
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