DE102004047183A1 - Fuel injection valve for internal combustion engine, has valve pin with valve sealing surface, which cooperates with valve seat, where surface or seat is provided with coating that exhibits high friction value when mating with steel - Google Patents
Fuel injection valve for internal combustion engine, has valve pin with valve sealing surface, which cooperates with valve seat, where surface or seat is provided with coating that exhibits high friction value when mating with steel Download PDFInfo
- Publication number
- DE102004047183A1 DE102004047183A1 DE200410047183 DE102004047183A DE102004047183A1 DE 102004047183 A1 DE102004047183 A1 DE 102004047183A1 DE 200410047183 DE200410047183 DE 200410047183 DE 102004047183 A DE102004047183 A DE 102004047183A DE 102004047183 A1 DE102004047183 A1 DE 102004047183A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- seat
- sealing surface
- valve seat
- coating
- 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- Withdrawn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 46
- 239000007924 injection Substances 0.000 title claims abstract description 46
- 239000000446 fuel Substances 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 title claims abstract description 34
- 238000000576 coating method Methods 0.000 title claims abstract description 23
- 239000011248 coating agent Substances 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 12
- 239000010959 steel Substances 0.000 title claims abstract description 12
- 230000013011 mating Effects 0.000 title claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 title claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F02M61/1806—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
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
- F02M2200/90—Selection of particular materials
- F02M2200/9038—Coatings
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
Die
Erfindung geht von einem Kraftstoffeinspritzventil aus, wie es beispielsweise
aus der Offenlegungsschrift
Moderne Einspritzsysteme für schnelllaufende Brennkraftmaschinen arbeiten nach verschiedenen Methoden. Eine Möglichkeit ist der Einsatz einer Verteilerpumpe, die für jede Einspritzung einen Kraftstoffstoß erzeugt, der sich von der Pumpe bis in einen Druckraum fortsetzt, der die Ventilnadel umgibt. Durch den ansteigenden Druck in diesem Druckraum ergibt sich eine in Längsrichtung wirkende hydraulische Kraft auf die Ventilnadel, die zu einer Längsbewegung derselben führt und die Einspritzöffnungen freigibt. Eine andere Möglichkeit, wie sie bei sogenannten Common-Rail-Einspritzsystemen verwendet wird, ist die, einen vorgegebenen hohen Kraftstoffdruck im Druckraum zu erzeugen und die Ventilnadel durch eine entsprechend hohe Schließkraft in ihrer Schließstellung zu halten, bis eine Einspritzung erwünscht ist. Die Schließkraft wird dann reduziert, so dass die Ventilnadel durch den Druck in den Druckraum bewegt wird und die Einspritzung erfolgt.modern Injection systems for High-speed internal combustion engines work according to different Methods. A possibility is the use of a distributor pump that generates a fuel injection for each injection, which continues from the pump to a pressure chamber, the Valve needle surrounds. Due to the increasing pressure in this pressure chamber results one in the longitudinal direction acting hydraulic force on the valve needle, resulting in a longitudinal movement same leads and releases the injection ports. Another possibility, as used in so-called common-rail injection systems, is the, a predetermined high fuel pressure in the pressure chamber too generate and the valve needle by a correspondingly high closing force in their closed position to hold until injection is desired. The closing force is then reduced, leaving the valve needle by the pressure in the pressure chamber is moved and the injection takes place.
Bei beiden genannten Einspritzsystemen ergibt sich ein wechselnder Druck im Druckraum, der bei der Verteilerpumpe durch die einzelnen Druckstöße hervorgerufen wird und bei Common-Rail-Systemen durch Druckschwingungen, wie sie beim Öffnen und Schließen der Ventilnadel erzeugt werden. Die Druckschwingungen führen zu einer periodischen Aufweitung des Ventilkörpers und damit zu einer leichten Bewegung der Ventildichtfläche gegenüber dem Ventilsitz, so dass sich an dieser Stelle Reibung ergibt. Durch die Reibung gräbt sich die Ventildichtfläche mit der Zeit in den Ventilsitz ein, so dass sich die vom Kraftstoffdruck im Druckraum beaufschlagte Teilfläche der Ventildichtfläche ändert. Dies verändert den Druck, bei dem die Ventilnadel öffnet, und damit die Einspritzcharakteristik, die sich so über die Lebensdauer des Kraftstoffeinspritzventils allmählich ändert. Dies erschwert eine präzise Einspritzung, da hierfür der Öffnungsdruck genau bekannt sein muss.at Both said injection systems results in an alternating pressure in the pressure chamber, caused by the individual pressure surges in the distributor pump and in common-rail systems by pressure oscillations, as they are when opening and Shut down the valve needle can be generated. The pressure oscillations lead to a periodic widening of the valve body and thus a slight Movement of the valve sealing surface compared to the Valve seat, so that there is friction at this point. By the friction digs the valve sealing surface with time in the valve seat, so that the fuel pressure in the pressure chamber acted upon partial surface of the valve sealing surface changes. This changed that Pressure at which the valve needle opens, and thus the injection characteristic, which is so over the Life of the fuel injection valve gradually changes. This makes one more difficult precise Injection, because of this the opening pressure must be known exactly.
Zur
Vermeidung dieses Problems ist es beispielsweise aus der
Solche Beschichtungen weisen jedoch den Nachteil auf, dass sie sehr aufwendig zu fertigen sind und sich das Kraftstoffeinspritzventil dadurch nicht unerheblich verteuert. Darüber hinaus besteht auch bei einer sachgemäß aufgebrachten Schicht die Gefahr, dass dieses sehr harte und spröde Material durch die starke mechanische Beanspruchung beim Aufsetzen der Ventilnadel auf dem Ventilsitz abplatzt.Such However, coatings have the disadvantage that they are very expensive to be finished and the fuel injector thereby not significantly more expensive. About that In addition, even with a properly applied layer, the Danger that this very hard and brittle material by the strong mechanical stress when placing the valve needle on the Valve seat flakes off.
Vorteile der ErfindungAdvantages of invention
Das erfindungsgemäße Kraftstoffeinspritzventil mit den kennzeichnenden Merkmalen des Patentanspruchs 1 weist demgegenüber den Vorteil auf, dass sich der Verschleiß zwischen Ventilfläche und Ventilsitz entscheidend vermindert und dies bei niedrigen Kosten. Hierzu ist die Ventilnadel oder der Ventilsitz mit einer Beschichtung versehen, die einen hohen Reibwert in der Paarung mit Stahl aufweist. Dies führt dazu, dass die Ventildichtfläche mit einer hohen Haftreibung auf dem Ventilsitz aufsitzt, so dass sich Ventilsitz und Ventildichtfläche durch das leichte Aufweiten eines Ventilkörpers nicht gegenseitig bewegen können. Da es jetzt im geschlossenen Zustand des Kraftstoffeinspritzventils keine Bewegung zwischen Ventildichtfläche und Ventilsitz gibt, tritt an dieser Stelle nur eine deutlich verminderte Reibung auf, so dass der Verschleiß in diesem Bereich stark zurückgeht und der Öffnungsdruck des Kraftstoffeinspritzventils über die Lebensdauer konstant bleibt.The Fuel injection valve according to the invention with the characterizing features of claim 1, in contrast, the Advantage on that the wear between valve face and valve seat significantly reduced and this at low cost. This is the valve needle or the valve seat provided with a coating, which has a high coefficient of friction in mating with steel. This leads to, that the valve sealing surface with a high static friction on the valve seat, so that Valve seat and valve sealing surface by the slight expansion a valve body can not move each other. Since it is now in the closed state of the fuel injector There is no movement between the valve sealing surface and the valve seat at this point only a significantly reduced friction, so that the wear in this area is falling sharply and the opening pressure of the fuel injection valve over the life remains constant.
Durch die Unteransprüche sind vorteilhafte Weiterbildungen des Gegenstandes der Erfindung möglich. In einer ersten vorteilhaften Ausgestaltung besteht die Schicht aus einem im Vergleich zu Stahl weichen Metall, wobei hierbei besonders die Verwendung von Gold, Nickel oder Palladium vorteilhaft ist. Es ist jedoch auch möglich, eine Beschichtung aus einem Kunststoff aufzubringen. Sowohl die genannten Metalle als auch die Kunststoffe lassen sich mit wenig Aufwand auf die Ventildichtfläche bzw. den Ventilsitz aufbringen, so dass hierdurch nur geringe Kosten entstehen. Alle diese Materialien haben die Eigenschaft, dass sie gegenüber Stahl einen hohen Reibwert besitzen, so dass die Ventilnadel, wenn sie mit großer Kraft gegen den Ventilsitz gepresst wird, mit ihrer Ventildichtfläche auf dem Ventilsitz haftet und keine Relativbewegung zwischen Ventilsitz und Ventildichtfläche stattfindet.The subclaims advantageous developments of the subject invention are possible. In a first advantageous embodiment, the layer consists of a metal which is soft compared to steel, in which case the use of gold, nickel or palladium is particularly advantageous. However, it is also possible to apply a coating of a plastic. Both the metals and the plastics mentioned can be applied with little effort to the valve sealing surface or the valve seat, so that this results in low costs. All these materials have the property that they have a high coefficient of friction with respect to steel, so that the valve needle, when pressed with great force against the valve seat, with its valve sealing surface adheres to the valve seat and there is no relative movement between the valve seat and valve sealing surface.
Besonders vorteilhaft sind diese Beschichtungen bei einem Ventilsitz und einer Ventildichtfläche, die zumindest annähernd konisch geformt sind. Hierbei ist eine Beschichtung in einer Dicke von höchstens 5 μm vorteilhaft, die sich zum einen schnell aufbringen lässt und die zum anderen nicht die mechanische Stabilität der Ventilnadel bzw. die der Paarung Ventilnadel/Ventilsitz gefährdet.Especially These coatings are advantageous in a valve seat and a Valve sealing surface, the least approximate are conically shaped. Here is a coating in a thickness from at most 5 μm advantageous, which, on the one hand, can be applied quickly and, on the other hand, not the mechanical stability the valve needle or the mating valve needle / valve seat endangered.
Zeichnungdrawing
In der Zeichnung ist ein Ausführungsbeispiel des erfindungsgemäßen Kraftstoffeinspritzventils dargestellt. Es zeigtIn the drawing is an embodiment of the illustrated fuel injection valve according to the invention. It shows
Beschreibung des Ausführungsbeispielsdescription of the embodiment
In
Die
Funktionsweise ist so, dass durch den Druck im Druckraum
Sowohl
beim Betrieb mittels einer Verteilerpumpe, bei dem der Kraftstoffdruck
im Druckraum
Die
Beschichtung
Es
kann auch vorgesehen sein, die Beschichtung
Claims (8)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410047183 DE102004047183A1 (en) | 2004-09-29 | 2004-09-29 | Fuel injection valve for internal combustion engine, has valve pin with valve sealing surface, which cooperates with valve seat, where surface or seat is provided with coating that exhibits high friction value when mating with steel |
| FR0552887A FR2875864A1 (en) | 2004-09-29 | 2005-09-27 | FUEL INJECTOR |
| CN 200510108737 CN1755098A (en) | 2004-09-29 | 2005-09-29 | fuel injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410047183 DE102004047183A1 (en) | 2004-09-29 | 2004-09-29 | Fuel injection valve for internal combustion engine, has valve pin with valve sealing surface, which cooperates with valve seat, where surface or seat is provided with coating that exhibits high friction value when mating with steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102004047183A1 true DE102004047183A1 (en) | 2006-03-30 |
Family
ID=36011657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE200410047183 Withdrawn DE102004047183A1 (en) | 2004-09-29 | 2004-09-29 | Fuel injection valve for internal combustion engine, has valve pin with valve sealing surface, which cooperates with valve seat, where surface or seat is provided with coating that exhibits high friction value when mating with steel |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1755098A (en) |
| DE (1) | DE102004047183A1 (en) |
| FR (1) | FR2875864A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1816342A1 (en) * | 2006-02-03 | 2007-08-08 | Siemens Aktiengesellschaft | Valve assembly for an injection valve and injection valve |
| US9441590B2 (en) | 2009-08-28 | 2016-09-13 | Robert Bosch Gmbh | Fuel injection valve |
| EP3309386A1 (en) * | 2016-10-14 | 2018-04-18 | Delphi International Operations Luxembourg S.à r.l. | Fuel injector valve member |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015206467A1 (en) * | 2015-02-17 | 2016-08-18 | Robert Bosch Gmbh | Injection valve for a gaseous or liquid medium and method for producing such an injection valve |
| CN110407292B (en) * | 2018-04-28 | 2024-02-20 | 芜湖美的厨卫电器制造有限公司 | Ejectors and water softeners |
-
2004
- 2004-09-29 DE DE200410047183 patent/DE102004047183A1/en not_active Withdrawn
-
2005
- 2005-09-27 FR FR0552887A patent/FR2875864A1/en active Pending
- 2005-09-29 CN CN 200510108737 patent/CN1755098A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1816342A1 (en) * | 2006-02-03 | 2007-08-08 | Siemens Aktiengesellschaft | Valve assembly for an injection valve and injection valve |
| US9441590B2 (en) | 2009-08-28 | 2016-09-13 | Robert Bosch Gmbh | Fuel injection valve |
| EP3309386A1 (en) * | 2016-10-14 | 2018-04-18 | Delphi International Operations Luxembourg S.à r.l. | Fuel injector valve member |
| FR3057623A1 (en) * | 2016-10-14 | 2018-04-20 | Delphi International Operations Luxembourg S.A R.L. | VALVE MEMBER OF A FUEL INJECTOR |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2875864A1 (en) | 2006-03-31 |
| CN1755098A (en) | 2006-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |