EP1258627A2 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1258627A2 EP1258627A2 EP02010815A EP02010815A EP1258627A2 EP 1258627 A2 EP1258627 A2 EP 1258627A2 EP 02010815 A EP02010815 A EP 02010815A EP 02010815 A EP02010815 A EP 02010815A EP 1258627 A2 EP1258627 A2 EP 1258627A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- spray opening
- valve seat
- seat body
- 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.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- 239000000446 fuel Substances 0.000 title claims description 59
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims description 46
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000004939 coking Methods 0.000 description 5
- 230000005291 magnetic effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/188—Spherical or partly spherical shaped valve member ends
-
- 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
- F02M61/16—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
Definitions
- the invention is based on a fuel injector according to the genus of the main claim.
- DE 198 04 463 A1 describes a fuel injection system for a mixture-compressing, spark-ignited Internal combustion engine known which one Fuel injector includes, the fuel into a combustion chamber formed by a piston / cylinder construction injected, and with a protruding into the combustion chamber Spark plug is provided.
- the fuel injector is with at least one row on the scope of the Distributed fuel injector Provide injection holes. Through a targeted injection of fuel through the injection holes becomes one beam-guided combustion process by forming a Mixture cloud realized with at least one beam.
- a disadvantage of the from the above publication known fuel injector is in particular the Coking of the spray openings, which block it and the flow through the fuel injector reduce excessively. Because the fuel spray valve injected directly into a combustion chamber, it is higher Exposed to temperature loads. Furthermore, because of Plurality of spray orifices the diameter of the Spray orifices smaller to accommodate small injection quantities To achieve fuel. The relative area in the Spray bores, which is wetted with fuel larger and coking occurs more easily. this leads to an impairment of the jet formation of the fuel and thus the mixture formation.
- the fuel injector according to the invention with the has characteristic features of the main claim in contrast, the advantage that coking is avoided.
- the fuel is cooler than the temperature of the Valve seat body, which is made of highly heat-resistant steel becomes. When flowing through the spray openings, the cools Fuel therefore the spray openings. Because of the low Thermal conductivity of the spray port carrier is that of the heat transferred to the valve seat body is less than that heat absorbed by this cooling effect. The temperature therefore remains below on the surface of the spray openings a critical value at which coking occurs.
- the heat conduction coefficient is advantageously smaller than 2 W / mK and the material of the spray port carrier heat resistant up to approx. 200 ° C.
- the material of the Spray port carrier ceramic, glass or a silicate-based material and, the spray port carrier can be cast into the valve seat body.
- the materials mentioned also hinder the Accumulation of coked fuel and are heat stable.
- the material of the Spray port carrier plastic and can in the Valve seat body can be injected as a plastic injection molded part.
- the spray opening carrier can be glued to the valve seat body.
- valve seat body and the spray port carrier can be made separately and each for different Optimized versions of a fuel injector become.
- a first embodiment of a shown in FIG Fuel injector 1 according to the invention is in the Form of a fuel injector 1 for Fuel injection systems from mixture-compressing, spark-ignition internal combustion engines.
- the Fuel injector 1 is particularly suitable for not injecting fuel directly into one Shown combustion chamber 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 stands with a valve closing body 4 in Active connection with one on a valve seat body 5 arranged valve seat surface 6 to a sealing seat interacts.
- the fuel injector 1 is acting it is an inward opening in the exemplary embodiment Fuel injector 1, which over several Spray openings 7 has.
- In the valve seat body 5 is an injection port carrier 5a is used, for example by gluing.
- the spray openings 7 are in the Spray opening carrier 5a formed.
- the nozzle body 2 is through a seal 8 against an outer pole 9 Magnetic coil 10 sealed.
- the solenoid 10 is in one Encapsulated coil housing 11 and on a coil carrier 12 wound, which on an inner pole 13 of the solenoid 10th is applied.
- the inner pole 13 and the outer pole 9 are by a Constriction 26 separated from one another and by one another non-ferromagnetic connecting component 29 connected.
- the Solenoid 10 is connected via a line 19 from one to the other an electrical plug contact 17 feedable electrical Current excited.
- the plug contact 17 is one Surround plastic sheath 18 on the inner pole 13th can be molded.
- the valve needle 3 is in a valve needle guide 14 led, which is disc-shaped. to A paired adjusting disc 15 is used for stroke adjustment the other side of the shim 15 is the Anchor 20. This stands over a first flange 21 non-positively in connection with the valve needle 3, which by a weld seam 22 with the first flange 21 connected is. One is supported on the first flange 21 Return spring 23, which in the present design of the Fuel injector 1 through a sleeve 24 Bias is brought.
- Fuel channels 30a to 30b In the valve needle guide 14, in Armature 20 and run on the valve seat body 5 Fuel channels 30a to 30b.
- the fuel is about one central fuel supply 16 supplied and by a Filter element 25 filtered.
- the fuel injector 1 is no further by a seal 28 against one fuel line shown sealed.
- a annular damping element 32 On the spray side of the armature 20 is a annular damping element 32, which consists of a Elastomeric material is arranged. It's on one second flange 31, which has a weld seam 33 is non-positively connected to the valve needle 3.
- Fig. 2 shows an excerpted sectional view 1 marked with II in FIG. 1 from the one in FIG. 1 illustrated embodiment of an invention configured fuel injector 1.
- the Valve seat body 5 in the embodiment of the Spray port carrier 5a used for example by Glue.
- the material of the spray port carrier 5a is a bad heat conductor that is also a good one Has high heat resistance. For example, this is one Ceramics.
- a preferred value for the Thermal conduction coefficient is less than 2 W / mK and for that High heat resistance of the material of the spray opening carrier 5a to approximately 200 ° C.
- the valve seat body 5 is preferred made of highly heat-resistant steel.
- the spray openings 7 are in molded the spray port carrier 5a.
- the Valve closing body 4 interacts with that on the valve seat body 5 arranged valve seat 6 together to form the sealing seat.
- the fuel is cooler than the temperature of the Valve seat body 5, which has a relatively large surface is facing a combustion chamber of an internal combustion engine and is often located in an area of the combustion chamber that exposed to high temperatures.
- the Valve seat body 5 is therefore preferably made of highly heat-resistant Made of steel.
- the fuel cools the surfaces of the spray openings 7. Due to the low thermal conductivity of the Spray port carrier 5a is that of the valve seat body 5 transferred heat less than this cooling effect transported heat.
- the temperatures on the surfaces of the Spray orifices 7 remain below the critical value coking occurs.
- the flow rate of fuel and the jet shape of a fuel jet Spray opening 7 remains one during operation Internal combustion engine with an inventive Fuel injector 1 stable. This also keeps the Mixture formation stable, and in particular the Emission regulations can be observed over the operating period become.
- the invention is not shown on the Embodiments limited and also for multi-part executed valve seat body and spray-side sections of fuel injectors applicable, insofar as the Spray openings in a heat insulating material be molded, which is associated with these sections becomes.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Fig. 1
- einen schematischen Schnitt durch ein erstes Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils und
- Fig. 2
- den Ausschnitt II in der Fig. 1 in einer vergrößerten Darstellung.
Claims (9)
- Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen mit einem Aktor (10), einer von dem Aktor (10) betätigbaren Ventilnadel (3) zur Betätigung eines Ventilschließkörpers (4), der zusammen mit einer an einem Ventilsitzkörper (5) ausgebildeten Ventilsitzfläche (6) einen Dichtsitz bildet, und zumindest einer Abspritzöffnung (7),
gekennzeichnet durch
einen Abspritzöffnungsträger (5a), in welchem die zumindest eine Abspritzöffnung (7) ausgebildet ist und der in den Ventilsitzkörper (5) eingesetzt ist, wobei der Abspritzöffnungsträger (5a) aus einem Material mit gegenüber dem Material des Ventilsitzkörpers (5) niedrigerem Wärmeleitungskoeffizienten besteht. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß der Wärmeleitungskoeffizient des Materials des Abspritzöffnungsträgers (5a) kleiner als 2 W/mK ist und das Material des Abspritzöffnungsträgers (5a) bis ca. 200° C hochwarmfest ist. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Material des Abspritzöffnungsträgers (5a) Keramik ist. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Material des Abspritzöffnungsträgers (5a) Glas ist. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Material des Abspritzöffnungsträgers (5a) ein silicatbasiertes Material ist. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Material des Abspritzöffnungsträgers (5a) ein Kunststoff ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß der Abspritzöffnungsträger (5a) in den Ventilsitzkörper (5) eingegossen ist. - Brennstoffeinspritzventil nach Anspruch 6,
dadurch gekennzeichnet, daß der Abspritzöffnungsträger (5a) in den Ventilsitzkörper (5) als Kunststoffspritzteil eingespritzt ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß der Abspritzöffnungsträger (5a) in den Ventilsitzkörper (5) eingeklebt ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001123860 DE10123860A1 (de) | 2001-05-16 | 2001-05-16 | Brennstoffeinspritzventil |
| DE10123860 | 2001-05-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1258627A2 true EP1258627A2 (de) | 2002-11-20 |
| EP1258627A3 EP1258627A3 (de) | 2004-12-01 |
Family
ID=7685021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02010815A Withdrawn EP1258627A3 (de) | 2001-05-16 | 2002-05-15 | Brennstoffeinspritzventil |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1258627A3 (de) |
| DE (1) | DE10123860A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2922289A1 (fr) * | 2007-10-16 | 2009-04-17 | Renault Sas | Dispositif d'injection de fluide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19804463A1 (de) | 1998-02-05 | 1999-08-12 | Daimler Chrysler Ag | Kraftstoffeinspritzsystem für Ottomotoren |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2900176A1 (de) * | 1979-01-04 | 1980-07-24 | Bosch Gmbh Robert | Einspritzventil fuer kraftstoffeinspritzanlagen |
| DE4029056A1 (de) * | 1990-04-07 | 1991-10-17 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
| DE19503269A1 (de) * | 1995-02-02 | 1996-08-08 | Bosch Gmbh Robert | Brennstoffeinspritzventil für Brennkraftmaschinen |
| JPH10274134A (ja) * | 1997-03-28 | 1998-10-13 | Zexel Corp | 燃料噴射弁 |
-
2001
- 2001-05-16 DE DE2001123860 patent/DE10123860A1/de not_active Withdrawn
-
2002
- 2002-05-15 EP EP02010815A patent/EP1258627A3/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19804463A1 (de) | 1998-02-05 | 1999-08-12 | Daimler Chrysler Ag | Kraftstoffeinspritzsystem für Ottomotoren |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2922289A1 (fr) * | 2007-10-16 | 2009-04-17 | Renault Sas | Dispositif d'injection de fluide |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1258627A3 (de) | 2004-12-01 |
| DE10123860A1 (de) | 2002-11-28 |
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| AKX | Designation fees paid | ||
| REG | Reference to a national code |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20050602 |