WO2002095218A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2002095218A1 WO2002095218A1 PCT/DE2002/001633 DE0201633W WO02095218A1 WO 2002095218 A1 WO2002095218 A1 WO 2002095218A1 DE 0201633 W DE0201633 W DE 0201633W WO 02095218 A1 WO02095218 A1 WO 02095218A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- fuel
- injection valve
- flow channels
- elevations
- Prior art date
Links
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
-
- 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
-
- 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
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
- F02M2200/505—Adjusting spring tension by sliding spring seats
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
-
- 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
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- a fuel injection system for a mixture-compressing, spark-ignited internal combustion engine which comprises a fuel injection valve, which injects fuel into a combustion chamber formed by a piston / cylinder construction, and is provided with a spark plug projecting into the combustion chamber.
- the fuel injector is provided with at least one row of injection holes arranged distributed over the circumference of the fuel injector. Through a targeted injection of fuel through the injection holes, a jet-guided combustion process is realized by forming a mixture cloud with at least one jet.
- a disadvantage of the fuel injector known from the above-mentioned document is, in particular, the coking of the spray openings, which thereby clog and reduce the flow through the fuel injector to an unacceptably large extent. This leads to malfunctions of the internal combustion engine.
- the fuel injection valve f according to the invention with the characterizing features of the main claim has the advantage that the spray openings are designed so that bulge-like elevations rise above the outer end face of the valve seat body, comprising the flow channels in which the fuel is directed to the spray openings , The injection openings open into the combustion chamber of the internal combustion engine.
- the diameter of the flow channels advantageously tapers to the spray openings, so that the flow in the flow channels does not stop.
- a barrel-like shape which first widens and then tapers again, is advantageous for the shape of the flow channels.
- a straight, cylindrical shape of the flow channels is particularly advantageous because it is simple and inexpensive to manufacture.
- Flow channels can be easily modeled by the shape of the mandrel.
- the shape of the edge on the spray openings can be designed, in particular a tapered edge because of the. small deposit area for coking is favorable.
- the tendency to coke is also advantageously influenced by an extended intake radius that arises during the production of the spray openings.
- FIG. 1 shows a schematic section through a first embodiment of a fuel injector designed according to the invention in an overall view
- FIG. 2A shows a schematic section through the spray-side part of the first exemplary embodiment of the fuel injection valve according to the invention shown in FIG. 1 in the area IIA in FIG.
- 2B-C is an enlarged view of two exemplary embodiments of spray openings in the area IIB in FIG. 2A.
- the fuel injector 1 shows an excerpt of a sectional illustration of a first exemplary embodiment of a fuel injector 1 according to the invention.
- the fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.
- the fuel injection valve 1 is suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
- the fuel injector 1 consists of a
- Nozzle body 2 in which a valve needle 3 is arranged.
- the valve needle 3 is operatively connected to a valve closing body 4, which with one on a
- Valve seat body 5 arranged valve seat surface 6 cooperates to form a sealing seat.
- the fuel injection valve 1 is an inward-opening fuel injection valve 1 which has at least one spray opening 7.
- the valve closing body 4 of the fuel injection valve 1 designed according to the invention has an almost spherical shape. As a result, an offset-free, cardanic valve needle guide is achieved, which ensures an exact functioning of the fuel fine injection valve 1.
- the valve seat body 5 of the fuel injection valve 1 is almost cup-shaped and contributes to the valve needle guide through its shape.
- the valve seat body 5 is inserted into an injection-side recess 34 in the nozzle body 2 and is connected to the nozzle body 2 by means of a weld seam 35.
- the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10.
- the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
- the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
- the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
- the plug contact 17 is surrounded by a plastic sheath 18, which may be molded onto the inner pole 13.
- valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
- Stroke adjustment is provided by a paired adjusting disc 1 "5.
- Armature 20 On the other side of the adjusting disc 15 is located Armature 20. This is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
- a restoring spring 23 is supported on the first flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
- a second flange 31 is arranged on the outflow side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld seam 33.
- An elastic intermediate ring 32 is arranged between the armature 20 and the second flange 31 for damping armature bumpers when the fuel injector 1 closes.
- Fuel channels 30a run in the valve needle guide 14, in the armature 20 and on the valve seat body 5. up to 30c.
- the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
- the fuel injector 1 is sealed by a seal 28 against a distributor line, not shown.
- the fuel injection valve 1 on the valve seat body 5 which is arranged in a recess 34 of the nozzle body 2 and is connected to it, for example, by means of a weld seam 35, has elevations 36 in which flow channels 39 which open into the spray openings 7 run.
- the elevations 36 are formed on an outer end face 38 of the valve seat 5. Due to their special shape and arrangement, they reduce the tendency towards coking of the spray openings 7 and thus prevent malfunctions of the fuel injector 1 by clogging the spray openings 7 and an impermissible reduction in the fuel flow.
- the spray-side part of the fuel injection valve 1 with the measures according to the invention is shown and explained in more detail in the following figures.
- the first flange 21 on the valve needle 3 is acted upon by the return spring 23 against its lifting direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact.
- the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
- the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 in the stroke direction against the spring force of the return spring 23.
- the armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction.
- the valve closing body 4, which is operatively connected to the valve needle 3, lifts off the valve seat surface 6, as a result of which the fuel is sprayed off at the spray openings 7.
- the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23 on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction.
- the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed.
- the armature 20 rests on the armature stop formed by the second flange 31.
- Fig. 2A shows an excerpted sectional illustration of the one shown in FIG. 1 marked with IIA from the in Fig. 1 shown first embodiment of a fuel injection valve ils 1 designed according to the invention.
- valve seat body 5 in the first embodiment described 38 on its outer end face facing the combustion chamber 38 elevations 36, in which flow channels run, which open into the injection openings 7.
- the spray openings 7 are in the present
- the sprint openings 7 can be attached to any points of the valve seat body 5. They are preferably arranged on a plurality of round or elliptical circles of holes, which may be concentric or eccentric to one another, or on a plurality of parallel, oblique or offset rows of straight or curved holes.
- the distance between the hole centers can be equidistant or different, but should. be at least one hole diameter for manufacturing reasons.
- the spatial orientation can be different for each hole axis, as indicated for two spray openings 7 in FIG. 2A.
- the elevations 36 are dome-shaped to tubular above the outer end face 38 of the valve seat body 5.
- Valve seat body 5 is pierced, which the
- Spray openings 7 surrounding elevations 36 arise. Any shape of the mandrel can, as shown in FIGS. 2B and 2C, different shapes and cross sections of
- Spray openings are generated.
- FIG. 2B shows a cross-sectional shape of the spray opening 7, which tapers in the shape of a trumpet in the outflow direction of the fuel
- FIG. 2C shows a barrel-like cross-sectional shape, which overall also tapers in the outflow direction.
- the spray openings 7 can also extend in the direction of flow.
- the coking of the spray openings 7 can be reduced. Since the diameter of the spray orifices 7 is typically approximately 100 ⁇ m, the risk that the spray orifices 7 become blocked by coking over time and thus the flow rate is impermissibly restricted is relatively large. Due to the tapering shape of the flow channels 39 in the elevations , 36, the Flow velocity of the fuel in the flow direction, whereby a separation of the flow in the spray opening 7 is prevented. Due to the flow, the flow channels 39 and the spray openings 7 are protected against coking, so that the spray openings 7 cannot overgrow due to coking residues.
- the shape of the elevations 36 can be influenced by the use of a matrix, not shown, by the elevations 36 between the matrix and. pinched the mandrel and thereby an edge 41 of the elevations 36 can be shaped as desired.
- the edge 41 is formed to be tapered, which is advisable due to the very small surface area of the edge 41 in order to avoid the accumulation of coking residues.
- the invention is not limited to the illustrated embodiments and z. B. for arbitrarily arranged spray openings 7, for conical or cylindrical flow channels 39 and for any construction of inwardly opening multi-hole fuel injection valves 1 applicable.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50202848T DE50202848D1 (de) | 2001-05-21 | 2002-05-07 | Brennstoffeinspritzventil |
EP02735065A EP1395749B1 (de) | 2001-05-21 | 2002-05-07 | Brennstoffeinspritzventil |
JP2002591659A JP2004519621A (ja) | 2001-05-21 | 2002-05-07 | 燃料噴射弁 |
US10/333,287 US7011257B2 (en) | 2001-05-21 | 2002-05-07 | Fuel injection valve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10124748A DE10124748A1 (de) | 2001-05-21 | 2001-05-21 | Brennstoffeinspritzventil |
DE10124748.6 | 2001-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002095218A1 true WO2002095218A1 (de) | 2002-11-28 |
Family
ID=7685602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/001633 WO2002095218A1 (de) | 2001-05-21 | 2002-05-07 | Brennstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US7011257B2 (de) |
EP (1) | EP1395749B1 (de) |
JP (1) | JP2004519621A (de) |
CZ (1) | CZ200395A3 (de) |
DE (2) | DE10124748A1 (de) |
WO (1) | WO2002095218A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090032623A1 (en) * | 2004-10-09 | 2009-02-05 | Markus Gesk | Fuel Injector |
WO2010026478A1 (en) * | 2008-09-08 | 2010-03-11 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve of internal combustion engine |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10256662A1 (de) | 2002-12-04 | 2004-06-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102004033280A1 (de) * | 2004-07-09 | 2006-02-02 | Robert Bosch Gmbh | Einspritzventil zur Kraftstoffeinspritzung |
US7124963B2 (en) * | 2004-11-05 | 2006-10-24 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
FR2878583A1 (fr) * | 2004-11-29 | 2006-06-02 | Renault Sas | Buse d'injection de carburant |
US7572997B2 (en) * | 2007-02-28 | 2009-08-11 | Caterpillar Inc. | EDM process for manufacturing reverse tapered holes |
DE102008041676A1 (de) * | 2008-08-29 | 2010-03-04 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
PL2459867T3 (pl) * | 2009-07-30 | 2014-08-29 | 3M Innovative Properties Co | Dysza i sposób jej wytwarzania |
KR101198805B1 (ko) * | 2010-12-02 | 2012-11-07 | 현대자동차주식회사 | 차량용 인젝터 |
DE102012209326A1 (de) * | 2012-06-01 | 2013-12-05 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
KR101337713B1 (ko) * | 2012-12-20 | 2013-12-06 | 주식회사 현대케피코 | 연료 미립화 밸브 시트 바디를 구비한 차량용 고압 직분식 인젝터 |
US10047713B2 (en) * | 2013-11-11 | 2018-08-14 | Enplas Corporation | Attachment structure of fuel injection device nozzle plate |
DE102013225948A1 (de) * | 2013-12-13 | 2015-06-18 | Continental Automotive Gmbh | Düsenkopf und Fluid-Einspritzventil |
WO2016121475A1 (ja) | 2015-01-30 | 2016-08-04 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁 |
DE102020007299B4 (de) * | 2020-11-30 | 2022-10-20 | Daimler Truck AG | lnjektor zum Einbringen, insbesondere zum direkten Einblasen, von gasförmigem Kraftstoff in einen Brennraum einer Verbrennungskraftmaschine, sowie Gasmotor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE631135C (de) * | 1934-08-19 | 1936-06-12 | Wanderer Werke Vorm Winklhofer | Verfahren zur Herstellung von aus mehreren Teilen zusammengesetzten Dueseneinsaetzen |
EP0370659A1 (de) * | 1988-11-19 | 1990-05-30 | Lucas Industries Public Limited Company | Kraftstoffeinspritzdüse |
DE4209154A1 (de) * | 1991-03-20 | 1992-09-24 | Hitachi Ltd | Kraftstoffeinspritzventil |
DE4222137A1 (de) * | 1992-07-06 | 1994-01-13 | Bosch Gmbh Robert | Kraftstoff-Einspritzdüse für Diesel-Brennkraftmaschinen |
US5752316A (en) * | 1995-02-27 | 1998-05-19 | Aisan Kogyo Kabushiki Kaisha | Orifice plate for injector and method of manufacturing the same |
EP1124057A2 (de) * | 2000-02-08 | 2001-08-16 | Siemens Automotive Corporation | Kraftstoffeinspritzventil mit kegelförmigem, gewinkeltem Sprühstrahl |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4046322A (en) * | 1976-05-21 | 1977-09-06 | General Motors Corporation | Fuel injection nozzle assembly with stretch element |
US4405912A (en) * | 1982-01-28 | 1983-09-20 | General Motors Corporation | Solenoid assembly and method of making same |
FR2541379B1 (fr) * | 1983-02-21 | 1987-06-12 | Renault | Perfectionnement aux systemes d'injection a commande electromagnetique pour moteur diesel de type pression-temps ou l'aiguille de l'injecteur est pilotee par la decharge puis la charge d'une capacite |
DE19804463B4 (de) | 1998-02-05 | 2006-06-14 | Daimlerchrysler Ag | Kraftstoffeinspritzsystem für Ottomotoren |
DE19907899A1 (de) * | 1999-02-24 | 2000-08-31 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
-
2001
- 2001-05-21 DE DE10124748A patent/DE10124748A1/de not_active Withdrawn
-
2002
- 2002-05-07 EP EP02735065A patent/EP1395749B1/de not_active Expired - Lifetime
- 2002-05-07 JP JP2002591659A patent/JP2004519621A/ja active Pending
- 2002-05-07 CZ CZ200395A patent/CZ200395A3/cs unknown
- 2002-05-07 WO PCT/DE2002/001633 patent/WO2002095218A1/de not_active Application Discontinuation
- 2002-05-07 DE DE50202848T patent/DE50202848D1/de not_active Expired - Lifetime
- 2002-05-07 US US10/333,287 patent/US7011257B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE631135C (de) * | 1934-08-19 | 1936-06-12 | Wanderer Werke Vorm Winklhofer | Verfahren zur Herstellung von aus mehreren Teilen zusammengesetzten Dueseneinsaetzen |
EP0370659A1 (de) * | 1988-11-19 | 1990-05-30 | Lucas Industries Public Limited Company | Kraftstoffeinspritzdüse |
DE4209154A1 (de) * | 1991-03-20 | 1992-09-24 | Hitachi Ltd | Kraftstoffeinspritzventil |
DE4222137A1 (de) * | 1992-07-06 | 1994-01-13 | Bosch Gmbh Robert | Kraftstoff-Einspritzdüse für Diesel-Brennkraftmaschinen |
US5752316A (en) * | 1995-02-27 | 1998-05-19 | Aisan Kogyo Kabushiki Kaisha | Orifice plate for injector and method of manufacturing the same |
EP1124057A2 (de) * | 2000-02-08 | 2001-08-16 | Siemens Automotive Corporation | Kraftstoffeinspritzventil mit kegelförmigem, gewinkeltem Sprühstrahl |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090032623A1 (en) * | 2004-10-09 | 2009-02-05 | Markus Gesk | Fuel Injector |
WO2010026478A1 (en) * | 2008-09-08 | 2010-03-11 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve of internal combustion engine |
CN102144087A (zh) * | 2008-09-08 | 2011-08-03 | 丰田自动车株式会社 | 内燃发动机的燃料喷射阀 |
US8794549B2 (en) | 2008-09-08 | 2014-08-05 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve of internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JP2004519621A (ja) | 2004-07-02 |
CZ200395A3 (cs) | 2004-08-18 |
DE10124748A1 (de) | 2003-02-27 |
EP1395749A1 (de) | 2004-03-10 |
US7011257B2 (en) | 2006-03-14 |
US20040046063A1 (en) | 2004-03-11 |
EP1395749B1 (de) | 2005-04-20 |
DE50202848D1 (de) | 2005-05-25 |
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