EP0687811B1 - Elektromagnetisch betätigbares Brennstoffeinspritzventil - Google Patents
Elektromagnetisch betätigbares Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP0687811B1 EP0687811B1 EP95107720A EP95107720A EP0687811B1 EP 0687811 B1 EP0687811 B1 EP 0687811B1 EP 95107720 A EP95107720 A EP 95107720A EP 95107720 A EP95107720 A EP 95107720A EP 0687811 B1 EP0687811 B1 EP 0687811B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective sleeve
- fuel injection
- valve housing
- space
- injection valve
- 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
- 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
- F02M51/0675—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
- F02M51/0678—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
-
- 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
-
- 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
Definitions
- the invention is based on an electromagnetically actuated Fuel injection valve according to the type of the main claim (compare DE-C-4230376, FIG. 1)
- Numerous fuel injection valves are already known also from EP-PS 0 348 786, which has an electrical connector have, via which the electrical contacting a Solenoid coil and thus their excitation takes place.
- the contacting itself is done via metallic contact pins that come from the solenoid to the actual connector and are largely encapsulated by plastic.
- the encapsulation encloses here at least partially the valve housing.
- connection between the plastic encapsulation and the contact pins or the valve housing is not pressure-tight. Much more are about the shrinkage behavior of the plastic after the extrusion coating finest capillary gaps formed that connect of the coil space with the external environment.
- the coil space of the magnetic coil is heated. It takes place a volume equalization of the heated, expanding air in the Inside the valve with the atmosphere surrounding the valve. If the valve is cooled from a warm operating condition, then Ambient air in the coil space through the capillary gap between the plastic encapsulation and the contact pins or the valve housing sucked in; the inside of the valve "breathes". The cooling takes place of the injection valve by spray water or is at the cooling water on the capillaries, so the Liquid inside the valve, especially in the coil space sucked. The result is corrosion on the contact pins and the coil wire leading to destruction of the coil wire can lead.
- the training of many is particularly advantageous small channels in the protective sleeve through narrow ribs be formed so that a large internal volume with a large surface area. This ensures that even when vibrating or changing position Liquid is kept away from the capillary gaps.
- the due to the small channels of capillary holding forces prevent the sucked in from moving Liquid. Via the fuel injector, which is warmed up again and again vaporize the small amounts of liquid sucked in after a short time again, but not The prerequisite for the functioning of the protective sleeve is.
- FIG. 1 shows a fuel injector
- Figure 2 shows a section along the line II-II through the fuel injection valve in FIG. 1
- FIG. 3 another example of channel formation in the protective sleeve.
- the electromagnetic shown in Figure 1 for example actuable fuel injection valve for fuel injection systems of internal combustion engines has a tubular valve housing 1 made of a ferromagnetic material in which on a coil carrier 2 a magnetic coil 3 is arranged.
- the coil former 2 partially surrounds a step-shaped, concentric to a valve longitudinal axis 7 extending core 4, which is tubular is formed and via which the fuel is supplied.
- On its end facing away from the magnet coil 3 encloses the valve housing 1 in the axial direction partially a nozzle body 6.
- Zur liquid-tight seal between the valve housing 1 and the nozzle body 6 is an annular groove on the circumference of the nozzle body 6 10 formed in which a sealing ring 11 is arranged.
- Valve needle 21 is used between one of the solenoid 3 facing end face 13 of the Nozzle body 6 and one of the end faces 13 in the axial direction opposite inner shoulder 15 of the valve housing 1 .
- Two trained for example as a square Guide portions 22 of the valve needle 21 are through guided the guide area of the longitudinal bore 17; but they leave also an axial passage for the fuel free.
- the valve needle 21 penetrates a through opening with radial play 23 of the stop plate 16 and protrudes at its downstream end with a needle pin 25 from an injection opening 26 of the nozzle body 6 out.
- the stop plate 16 end facing away from the nozzle body 6 is a truncated cone Seat 28 formed, which serves as a valve closing part End of the valve needle 21 cooperates and the opening or Closes the fuel injector.
- valve needle 21 is tubular Anchor 30 firmly connected by the anchor 30 with one of the Area 32 facing area 32 a holding part 33 of the valve needle 21 embraces.
- a return spring 37 On a paragraph facing the solenoid 3 34 of the armature 30 is a return spring 37 with one End at. The return spring is supported at its other end 37 on a tubular adjusting sleeve 40, which in a stepped through hole 41 of the core 4 is pressed.
- To the connector made of plastic 45 include, for example, two metallic contact pins 46 that directly in connection with the winding of the magnetic coil 3 stand.
- the contact pins 46 protrude upstream from the Magnetic coil 3 surrounding coil holder 2 and are largely encapsulated by plastic. Only lie at their pin end 47 the contact pins 46 free; so they are not immediately from Plastic enclosed so that a connector with a Corresponding plug part, not shown, is possible.
- a water spray barrier serving protective sleeve 50 released the fuel injector on the outer circumference at least partially axially and completely radially surrounds.
- the tubular, for example from a protective sleeve 50 made of plastic is integral, e.g. B. by means of ultrasonic welding, on the plastic jacket 43 tight with the connector 45 facing the upper end attached while the protective sleeve 50 with the valve housing 1 its lower end facing the injection opening 26 with a Game fit surrounds.
- the breathing air from the injection valve then flows each over the capillary between the metal Valve housing 1 and the plastic casing 43 in between the valve housing 1 and the protective sleeve 50 formed Annular gap.
- the protective sleeve 50 is stepped executed, similar to the outer contour of the valve housing 1.
- the protective sleeve 50 surrounds with an outer lower shoulder 53 the valve housing 1, however, at a distance.
- the between the Protective sleeve 50 and the valve housing 1 formed space 54 is used by "breathing" between the protective sleeve 50 and the valve housing Take up and hold 1 liquid that has been sucked in.
- the room 54 is divided into numerous small channels or capillaries, through by the inner wall of the protective sleeve 50 ribs 57 projecting radially inwards. Two ribs each 57 delimit an intermediate channel.
- the Figure 2 shows a section through the fuel injector with the protective sleeve 50 vividly the formation of the ribs 57.
- the volume of the channels formed between the ribs 57 is much larger than that over the operating temperature range of the Internal combustion engine or the fuel injector occurring breathing volume. This ensures that sucked in Liquid does not get inside the fuel injector reached.
- the labyrinth of many formed with the ribs 57 small channels prevents even when vibrating or changing position through the capillary holding forces that sucked liquid to the point sealed by the fuel-carrying parts Coil space 49 penetrates.
- Figure 3 shows a further embodiment for the training of the labyrinth encompassing many channels in the protective sleeve 50.
- the ribs 57 are now not radial arranged, but in a circular shape. Further, not shown Embodiments with different arrangement of the channels meet as well as the function described.
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)
Description
Claims (7)
- Elektromagnetisch betätigbares Brennstoffeinspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen mit einem Ventilgehäuse (1) aus einem ferromagnetischen Werkstoff, einer Magnetspule, einem zumindest teilweise die Magnetspule (3) umgebenden Spulenträger, einem Kern (4), einem mit dem Kern zusammenwirkenden Anker (30), einer das Ventilgehäuse zumindest teilweise umgebenden Kunststoffummantelung und einem ebenfalls aus Kunststoff ausgebildeten elektrischen Anschlußstecker (45), zu dem wenigstens zwei Kontaktstifte gehören, über die die Erregung der Magnetspule erfolgt, wobei eine Schutzhülse (50) das Ventilgehäuse (1) zumindest radial vollständig umgibt, dadurch gekennzeichnet, daß wenigstens ein Bereich der Schutzhülse (50) so geschaffen ist, daß aufgrund eines räumlichen Abstandes der Schutzhülse (50) vom Ventilgehäuse (1) ein Raum (54) entsteht, sowie ein Ende der Schutzhülse (50) dicht mit der Kunststoffummantelung (43) verbunden ist und das andere Ende der Schutzhülse (50) zum Ventilgehäuse (1) Spiel aufweist.
- Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Raum (54) zwischen dem Ventilgehäuse (1) und der Schutzhülse (50) durch zahlreiche von der inneren Wandung der Schutzhülse (50) radial nach innen ragende Rippen (57) gegliedert ist und deswegen viele kleine Kanäle aufweist.
- Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Raum (54) zwischen dem Ventilgehäuse (1) und der Schutzhülse (50) durch zahlreiche in Kreisform angeordnete, ineinander geschachtelte Rippen (57) gegliedert ist und deswegen viele kleine Kanäle aufweist.
- Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Schutzhülse (50) aus einem Kunststoff gefertigt und mittels Ultraschallschweißen dicht an der Kunststoffummantelung (43) befestigt ist.
- Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Raum (54) an dem der Kunststoffummantelung (43) abgewandten Ende (52) liegt.
- Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß das Volumen des Raumes (54) größer ist als das atmende Volumen des Brennstoffeinspritzventils während des normalen Betriebstemperaturbereichs.
- Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Ausgleichsbohrung (59) vom Spulenraum (49) zum Umfang des Ventilgehäuses (1) vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4421429 | 1994-06-18 | ||
DE4421429A DE4421429A1 (de) | 1994-06-18 | 1994-06-18 | Elektromagnetisch betätigbares Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0687811A1 EP0687811A1 (de) | 1995-12-20 |
EP0687811B1 true EP0687811B1 (de) | 1999-03-17 |
Family
ID=6520972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95107720A Expired - Lifetime EP0687811B1 (de) | 1994-06-18 | 1995-05-20 | Elektromagnetisch betätigbares Brennstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US5634597A (de) |
EP (1) | EP0687811B1 (de) |
JP (1) | JPH084622A (de) |
DE (2) | DE4421429A1 (de) |
ES (1) | ES2131726T3 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6102303A (en) * | 1996-03-29 | 2000-08-15 | Siemens Automotive Corporation | Fuel injector with internal heater |
US6109543A (en) * | 1996-03-29 | 2000-08-29 | Siemens Automotive Corporation | Method of preheating fuel with an internal heater |
JP3518966B2 (ja) * | 1997-01-30 | 2004-04-12 | 三菱電機株式会社 | 筒内噴射用燃料噴射弁 |
US6422481B2 (en) | 1998-06-01 | 2002-07-23 | Siemens Automotive Corporation | Method of enhancing heat transfer in a heated tip fuel injector |
US6135360A (en) * | 1998-06-01 | 2000-10-24 | Siemens Automotive Corporation | Heated tip fuel injector with enhanced heat transfer |
JP2000291504A (ja) * | 1999-04-06 | 2000-10-17 | Mitsubishi Electric Corp | 燃料噴射弁 |
DE19921539B4 (de) * | 1999-05-11 | 2004-07-22 | Siemens Ag | Stecker für eine Kraftstoffpumpe eines Kraftfahrzeuges |
US6526746B1 (en) * | 2000-08-02 | 2003-03-04 | Ford Global Technologies, Inc. | On-board reductant delivery assembly |
DE10133263A1 (de) * | 2001-07-09 | 2003-02-06 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE102004058677A1 (de) * | 2004-12-06 | 2006-06-14 | Robert Bosch Gmbh | Einspritzventil |
DE102007008863A1 (de) * | 2005-08-26 | 2008-08-28 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102011086017A1 (de) * | 2011-11-09 | 2013-05-16 | Robert Bosch Gmbh | Dosiermodul |
DE102012204305A1 (de) * | 2012-03-19 | 2013-09-19 | Robert Bosch Gmbh | Dicht umspritztes Bauelement und Verfahren zum Erstellen eines solchen Bauelements |
DE102013211870B4 (de) | 2013-06-21 | 2022-03-24 | Continental Automotive Gmbh | Waschdüse für eine Scheibenwaschanlage eines Kraftfahrzeuges |
DE102015217673A1 (de) | 2015-09-15 | 2017-03-16 | Continental Automotive Gmbh | Einspritzvorrichtung zur Zumessung eines Fluids und Kraftfahrzeug mit einer derartigen Einspritzvorrichtung |
CN107091184A (zh) * | 2017-07-03 | 2017-08-25 | 东莞市盈森汽车电喷科技有限公司 | 喷油器高性能磁路结构 |
US10502112B2 (en) * | 2017-09-14 | 2019-12-10 | Vitesco Technologies USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
CN107965405A (zh) * | 2017-11-24 | 2018-04-27 | 广西卡迪亚科技有限公司 | 一种喷射器及其新型磁路结构 |
US10947880B2 (en) | 2018-02-01 | 2021-03-16 | Continental Powertrain USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
JP7028197B2 (ja) * | 2019-01-17 | 2022-03-02 | 株式会社デンソー | 燃料噴射弁 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1152184B (it) * | 1982-05-17 | 1986-12-31 | Alfa Romeo Auto Spa | Guaina di protezione per un iniettore di benzina |
GB2198589B (en) * | 1986-11-15 | 1990-09-12 | Hitachi Ltd | Electromagnetic fuel injector |
EP0348786B1 (de) * | 1988-06-28 | 1992-08-26 | Siemens Aktiengesellschaft | Elektromagnetisches Kraftstoffeinspritzventil |
JPH02241971A (ja) * | 1989-03-14 | 1990-09-26 | Honda Motor Co Ltd | 内燃機関用燃料噴射装置 |
JPH089980B2 (ja) * | 1990-03-15 | 1996-01-31 | 株式会社ユニシアジェックス | フューエルインジェクタ |
US5150842A (en) * | 1990-11-19 | 1992-09-29 | Ford Motor Company | Molded fuel injector and method for producing |
DE4230376C1 (de) * | 1992-09-11 | 1993-04-22 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
US5295627A (en) * | 1993-08-19 | 1994-03-22 | General Motors Corporation | Fuel injector stroke calibration through dissolving shim |
US5392995A (en) * | 1994-03-07 | 1995-02-28 | General Motors Corporation | Fuel injector calibration through directed leakage flux |
US5494224A (en) * | 1994-08-18 | 1996-02-27 | Siemens Automotive L.P. | Flow area armature for fuel injector |
-
1994
- 1994-06-18 DE DE4421429A patent/DE4421429A1/de not_active Withdrawn
-
1995
- 1995-05-20 DE DE59505356T patent/DE59505356D1/de not_active Expired - Fee Related
- 1995-05-20 ES ES95107720T patent/ES2131726T3/es not_active Expired - Lifetime
- 1995-05-20 EP EP95107720A patent/EP0687811B1/de not_active Expired - Lifetime
- 1995-06-06 US US08/470,784 patent/US5634597A/en not_active Expired - Fee Related
- 1995-06-14 JP JP7147881A patent/JPH084622A/ja not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JPH084622A (ja) | 1996-01-09 |
DE59505356D1 (de) | 1999-04-22 |
US5634597A (en) | 1997-06-03 |
EP0687811A1 (de) | 1995-12-20 |
DE4421429A1 (de) | 1995-12-21 |
ES2131726T3 (es) | 1999-08-01 |
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