EP1891323B1 - Fuel metering unit for a high-pressure fuel pump and associated high-pressure fuel pump - Google Patents
Fuel metering unit for a high-pressure fuel pump and associated high-pressure fuel pump Download PDFInfo
- Publication number
- EP1891323B1 EP1891323B1 EP06725632A EP06725632A EP1891323B1 EP 1891323 B1 EP1891323 B1 EP 1891323B1 EP 06725632 A EP06725632 A EP 06725632A EP 06725632 A EP06725632 A EP 06725632A EP 1891323 B1 EP1891323 B1 EP 1891323B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metering unit
- fuel metering
- armature
- valve piston
- bearing bush
- 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.)
- Not-in-force
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
Definitions
- the invention is based on a fuel metering unit for suction-side delivery rate control of the high-pressure fuel pump of an internal combustion engine, wherein the fuel metering unit comprises a solenoid actuated control valve with a valve piston, wherein the electromagnet comprises an armature and an anchor bolt, and with a bearing bush, wherein a first bearing bush between the Anchor and the valve piston is arranged and the first bearing bush, the anchor bolt axially displaceable leads.
- Such a fuel metering unit is for example from DE 102 47 436 A1 known.
- a bearing is disposed between an armature and a spool and a valve body.
- the armature of the electromagnet is surrounded by a bearing bush and axially displaceably guided.
- the invention has for its object to provide a Kraftstoffzumessaku with better performance and increased life.
- a fuel metering unit for the suction side Flow control of the high-pressure fuel pump of an internal combustion engine
- the indicator comprises a solenoid actuated control valve with a valve piston
- the electromagnet comprises an armature and an anchor bolt
- armature, anchor bolt and valve piston are interconnected and with a bearing bush
- a first bearing bush is arranged between the anchor bolt and the valve piston, and the first bearing bush axially displaceably guides and supports the anchor bolt.
- a second bearing bush between the armature and the valve piston is arranged, which guides the anchor bolt axially displaceable.
- non-negligible wear occurs during operation of the fuel metering unit according to the invention because the armature is soft annealed to optimize the magnetic properties.
- the anchor bolt from a more wear-resistant material than, for example, hardened steel.
- the surface roughness of the anchor bolt can be kept very small, which in turn has a positive effect on the frictional forces between bearing bush and anchor bolt and drastically reduces wear.
- the leadership of the anchor bolt is further improved. Due to the two spaced bearing bushes of the anchor bolt can not tilt or sideways dodge so that the armature is very well aligned with the solenoid. As a result, the operating behavior and the service life of the fuel metering unit according to the invention are further improved.
- the anchor bolt projects beyond the magnet when the second bearing bush is arranged on the end of the anchor bolt facing away from the valve piston.
- the second bushing is mounted in a magnet pot of the electromagnet.
- the bushings arranged between the magnet and the valve piston can advantageously be fastened in a valve housing of the fuel metering unit.
- bearing bushes are made of bronze.
- plastic in particular fuel-resistant and heat-resistant plastic.
- valve piston can be guided in the valve housing.
- the fuel metering unit according to the Characters. 1 and 2 is based on an electromagnet 1 with integrated control valve 3.
- the most important components of the electromagnet 1 are a magnetic coil 5, an armature 7 with anchor bolt 9 and a magnet pot 11, which encloses the magnetic coil 5 and the armature 7 partially.
- the entire fuel metering unit is arranged in a high-pressure fuel pump (not shown).
- the magnet pot 11 serves as a sealing element at the same time; as a magnetic return and as a fastener in the high-pressure pump.
- the attachment function is essentially fulfilled by the flange 13.
- the control valve 3 has a valve housing 15, which merges into a widening 17, which at the same time forms the frontal end of the magnet pot 11.
- an axial bore 19 is formed, which is arranged coaxially with the anchor bolt 9 of the electromagnet 1.
- the axial bore 19 receives a displaceable sleeve-shaped valve piston 21, in the interior of which a compression spring 23 is arranged.
- Compression spring 23 is supported at one end on a bottom 25 of the valve piston 21. At the other end, the compression spring 23 is supported on a spring plate 27 located in the axial bore 19. At the end facing away from the spring plate 27 of the valve piston 21, this is in contact with the one end of the anchor bolt 9. The compression spring 23 ensures that each adjusting movement of the anchor bolt 9 is transmitted directly to the valve piston 21.
- An opening 29 in the spring plate 27 connects the interior (without reference numeral) of the valve piston 21 with a not shown pre-feed pump of the fuel injection system.
- valve housing 15 In the valve housing 15 a plurality of radially directed control openings 31 are arranged.
- the control openings 31 are in hydraulic operative connection with the low-pressure region of the high-pressure fuel pump, not shown.
- the flow direction from the opening 29 through the valve piston 21 and the control openings 31 can also be reversed.
- the control openings 31 would then be connected to the pressure side of the prefeed pump, while the opening 29 would be hydraulically connected to the low-pressure region of the high-pressure pump.
- the upper half of the FIG. 1 shows the control valve 11 in the open position in which the control port 31 is completely released by the valve piston 21.
- the control valve 3 In the lower half of the FIG. 1 the control valve 3 is shown in its closed position.
- the magnetic force of the energized electromagnet 1 via the armature 7 and the anchor bolt 9 acts on the valve piston 21 and moves this against the compression spring 23 in said closed position.
- the compression spring 23 can move the valve piston 21 in the open position as soon as the energization of the electromagnet 1 and thus its acting on the armature 7 and the anchor bolt 9 magnetic force is reduced accordingly.
- a compensation bore 33 is provided in the bottom 25 of the valve piston 21 . Also in the anchor 7 compensating holes 35 are provided.
- non-inventive fuel metering unit protrudes the anchor bolt 9 via the armature 7 in the magnet pot 11 addition.
- a first bearing bush 37 is pressed in the valve housing 15.
- the first bearing bush 37 serves to guide the anchor bolt 9 and with it the armature 7 in the axial direction. Since the anchor bolt 9 can be made of a wear-resistant material, such as hardened steel, the bearing of the moving parts of the electromagnet 1 by means of the first bearing bush 37 is very durable and virtually wear-free. Because of the naturally small diameter of the anchor bolt 9 in comparison to the outer diameter of the armature 7 and the friction between the first bearing bush 37 and the anchor bolt 9 is very low.
- a second bearing bush 39 is pressed into the magnet pot 11. As a result, the tilting of the anchor bolt 9 is prevented.
- the two-sided guidance of the anchor bolt 9 also ensures that the armature 7 can not escape in the radial direction, if, for example, the magnetic forces exerted by the magnetic coil 5 on the armature 7 have a radial component. Because of the precise and low-wear guidance of the anchor bolt 9 in the bearing bushes 37 and 39 is also ensured that the armature 7 does not come into contact with the magnet pot 11 and thus there neither friction nor wear can occur.
- FIG. 2 an embodiment of a fuel metering unit according to the invention is shown, in which the overall length compared to in FIG. 1 shown Kraftstoffzumessaku is somewhat shortened and at the same time a precise and low-wear guidance of the anchor bolt 9 and with it the armature 7 is achieved.
- both the first bearing bush 37 and the second bearing bush 39 are arranged in the region between the armature 7 and the valve piston 21.
- Both bearing bushes 37 and 39 are pressed into the magnet pot 11 and are spaced from each other in the axial direction of the anchor bolt 9. As a result, a tilting of the anchor bolt 9 and thus also a grinding or contact between the armature 7 and the magnet pot 11 is effectively prevented.
Abstract
Description
Die Erfindung geht aus von einer Kraftstoffzumesseinheit zur saugseitigen Fördermengenregelung der Kraftstoffhochdruckpumpe einer Brennkraftmaschine, wobei die Kraftstoffzumesseinheit ein von einem Elektromagnet betätigtes Regelventil mit einem Ventilkolben aufweist, wobei der Elektromagnet einen Anker und einen Ankerbolzen umfasst, und mit einer Lagerbuchse, wobei eine erste Lagerbuchse zwischen dem Anker und dem Ventilkolben angeordnet ist und die erste Lagerbuchse den Ankerbolzen axial verschiebbar führt.The invention is based on a fuel metering unit for suction-side delivery rate control of the high-pressure fuel pump of an internal combustion engine, wherein the fuel metering unit comprises a solenoid actuated control valve with a valve piston, wherein the electromagnet comprises an armature and an anchor bolt, and with a bearing bush, wherein a first bearing bush between the Anchor and the valve piston is arranged and the first bearing bush, the anchor bolt axially displaceable leads.
Eine solche Kraftstoffzumesseinheit ist beispielsweise aus der
Bei dieser Kraftstoffzumesseinheit ist ein Lager zwischen einem Anker und einem Spulenkörper und einem Ventilkörper angeordnet.In this fuel metering unit, a bearing is disposed between an armature and a spool and a valve body.
Ferner ist eine Kraftstoffzumesseinheit beispielsweise aus der
Bei dieser Kraftstoffzumesseinheit wird der Anker des Elektromagneten von einer Lagerbuchse umfasst und axial verschiebbar geführt.In this fuel metering unit, the armature of the electromagnet is surrounded by a bearing bush and axially displaceably guided.
Der Erfindung liegt die Aufgabe zugrunde, eine Kraftstoffzumesseinheit mit besserem Betriebsverhalten und erhöhter Lebensdauer bereitzustellen.The invention has for its object to provide a Kraftstoffzumesseinheit with better performance and increased life.
Diese Aufgabe wird erfindungsgemäß bei einer Kraftstoffzumesseinheit zur saugseitigen Fördermengenregelung der Kraftstoffhochdruckpumpe einer Brennkraftmaschine, wobei die Kennzeichen ein von eine Elektromagnet betätigtes Regelventil mit einem Ventilkolben aufweist, wobei der Elektromagnet einen Anker und einen Ankerbolzen umfasst, und wobei Anker, Ankerbolzen und Ventilkolben miteinander verbunden sind und mit einer Lagerbuchse, dadurch gelöst, dass eine erste Lagerbuchse zwischen dem Ankerbolzen und dem Ventilkolben angeordnet ist, und die erste Lagerbuchse den Ankerbolzen axial verschiebbar führt und lagert. Ferner ist eine zweite Lagerbuchse zwischen dem Anker und dem Ventilkolben angeordnet, die den Ankerbolzen axial verschiebbar führt.This object is achieved according to the invention in a fuel metering unit for the suction side Flow control of the high-pressure fuel pump of an internal combustion engine, wherein the indicator comprises a solenoid actuated control valve with a valve piston, wherein the electromagnet comprises an armature and an anchor bolt, and wherein armature, anchor bolt and valve piston are interconnected and with a bearing bush, achieved in that a first bearing bush is arranged between the anchor bolt and the valve piston, and the first bearing bush axially displaceably guides and supports the anchor bolt. Furthermore, a second bearing bush between the armature and the valve piston is arranged, which guides the anchor bolt axially displaceable.
Durch die erfindungsgemäße Führung der bewegten Teile der Kraftstoffzumesseinheit am Ankerbolzen wird die Reibung zwischen der Lagerbuchse und dem bewegten Teil deutlich verringert, weil der Durchmesser des Ankerbolzens sehr viel kleiner ist als der Durchmesser des Ankers, so dass sich die Kontaktfläche zwischen Lagerbuchse und dem zu lagernden Teil bei der erfindungsgemäßen Kraftstoffzumesseinheit drastisch reduziert.The inventive leadership of the moving parts of the fuel metering unit on the anchor bolt, the friction between the bearing bush and the moving part is significantly reduced, because the diameter of the anchor bolt is much smaller than the diameter of the armature, so that the contact surface between the bearing bush and to be stored Part drastically reduced in the fuel metering unit according to the invention.
Bei der aus dem Stand der Technik bekannten Kraftstoffzumesseinheit tritt ein nicht zu vernachlässigender Verschleiß beim Betrieb der erfindungsgemäßen Kraftstoffzumesseinheit auf, weil der Anker zur Optimierung der magnetischen Eigenschaften weich geglüht wird.In the fuel metering unit known from the prior art, non-negligible wear occurs during operation of the fuel metering unit according to the invention because the armature is soft annealed to optimize the magnetic properties.
Außerdem ist es möglich, den Ankerbolzen aus einem verschleißfesteren Werkstoff als beispielsweise gehärtetem Stahl herzustellen. Durch eine.geeignete Oberflächenbearbeitung, wie beispielsweise Schleifen oder Superfinishen kann zudem die Oberflächenrauigkeit des Ankerbolzens sehr klein gehalten werden, was sich wiederum positiv auf die Reibungskräfte zwischen Lagerbuchse und Ankerbolzen auswirkt und den Verschleiß drastisch reduziert.In addition, it is possible to produce the anchor bolt from a more wear-resistant material than, for example, hardened steel. By ein.geeignete surface treatment, such as grinding or superfinishing also the surface roughness of the anchor bolt can be kept very small, which in turn has a positive effect on the frictional forces between bearing bush and anchor bolt and drastically reduces wear.
Im Ergebnis ist es dadurch möglich, eine Kraftstoffzumesseinheit bereitzustellen, deren Ansprechverhalten verbessert wird, bei der die hysterese zwischen einer Öffnungsbewegung und einer Schließbewegung im Vergliech zu herrkömmlichen Kraftstoffzumesseinheiten auf ein Viertel verringert wird. Außerdem werden die Herstellungskosten reduziert, weil die erfindungsgemäße erste Lagerbuchse einen sehr viel kleineren Durchmesser aufweist und infolgedessen kostengünstiger herzustellen ist. Ferner istAs a result, it is possible to provide a fuel metering unit whose response is improved, in which the hysteresis between an opening movement and a closing movement in comparison with conventional fuel metering units is reduced to a quarter. In addition, the manufacturing cost is reduced because the first bearing bush according to the invention has a much smaller diameter and consequently is cheaper to manufacture. Further is
eine zweite Lagerbuchse zwischen dem Ankerbolzen und dem Ventilkolben angeordnet, wobei auch die zweite Lagerbuchse den Ankerbolzen axial verschiebbar führt. Durch diese zwei Lagerbuchsen, die vorteilhafterweise mit einem axialen Absatnd zueiander angeordnet sind, wird die Führung des Ankerbolzens weiter verbessert. Durch die zwei voneinander beabstandeten Lagerbuchsen kann der Ankerbolzen nicht mehr kippen oder seitlich ausweichen, so dass der Anker sehr gut fluchtend zu der Magnetspule geführt ist. Dadurch wird das Betriebsverhalten und die Lebensdauer der erfindungsgemäßen Kraftstoffzumesseinheit weiter verbessert.arranged a second bearing bush between the anchor bolt and the valve piston, wherein the second bearing bush axially slidably guides the anchor bolt. Through these two bushings, which are advantageously arranged with an axial Absatnd zueiander, the leadership of the anchor bolt is further improved. Due to the two spaced bearing bushes of the anchor bolt can not tilt or sideways dodge so that the armature is very well aligned with the solenoid. As a result, the operating behavior and the service life of the fuel metering unit according to the invention are further improved.
Es ist möglich, die zweite Lagerbuchse an dem dem Ventilkolben abgewandten Ende des Ankerbolzens anzuordnen und den Ankerbolzen auch in der zweiten. Lagerbuchse axial verschiebbar zu führen.It is possible to arrange the second bearing bush at the end of the anchor bolt facing away from the valve piston and also the anchor bolt in the second. To guide bushing axially displaceable.
Der Ankerbolzen ragt über den Magnet hinaus, wenn die zweite Lagerbuchse an dem dem Ventilkolben abgewandten Ende des Ankerbolzens angeordnet ist. In diesem Fall ist die zweite Lagerbuchse in einem Magnettopf des Elektromagneten befestigt.The anchor bolt projects beyond the magnet when the second bearing bush is arranged on the end of the anchor bolt facing away from the valve piston. In this case, the second bushing is mounted in a magnet pot of the electromagnet.
Die zwischen dem Magnet und Ventilkolben angeordneten Lagerbuchsen können vorteilhafterweise in einem ventilgehäuse der Kraftstoffzumesseinheit befestigt werden.The bushings arranged between the magnet and the valve piston can advantageously be fastened in a valve housing of the fuel metering unit.
Es hat sich bei praktischen Versuchen als vorteilhaft erwiesen, wenn die Lagerbuchsen aus Bronze hergestellt werden. Alternativ ist es auch möglich, die Lagerbuchsen aus Kunststoff, insbesondere kraftstoffbeständigem und hitzebeständigem Kunststoff, herzustellen.It has proven to be advantageous in practical experiments when the bearing bushes are made of bronze. Alternatively, it is also possible to produce the bearing bushes made of plastic, in particular fuel-resistant and heat-resistant plastic.
Falls erforderlich kann in weiterer vorteilhafter Ausgestaltung der Erfindung der Ventilkolben in dem Ventilgehäuse geführt werden.If necessary, in a further advantageous embodiment of the invention, the valve piston can be guided in the valve housing.
Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Zeichnung, deren Beschreibung und den Patentansprüchen entnehmbar.Further advantages and advantageous embodiments of the invention are the following drawings, the description and the claims removable.
Es zeigen:
- Figur 1
- eine nicht erfindungsgemäße Kraftstoffzumesseinheit, und
- Figur 2
- ein Ausführungsbeispiel einer erfindungsgemäßen Kraftstoffzumesseinheit.
- FIG. 1
- a non-inventive fuel metering unit, and
- FIG. 2
- An embodiment of a fuel metering unit according to the invention.
Die Kraftstoffzumesseinheit gemäß den
Die gesamte Kraftstoffzumesseinheit ist in einer.nicht dargestellten Kraftstoffhochdruckpumpe angeordnet. Der Magnettopf 11 dient hierbei gleichzeitig als Abdichtelement; als magnetischer Rückschluss und als Befestigungselement in der Hochdruckpumpe. Die Befestigungsfunktion wird im Wesentlichen durch den Flansch 13 erfüllt.The entire fuel metering unit is arranged in a high-pressure fuel pump (not shown). The magnet pot 11 serves as a sealing element at the same time; as a magnetic return and as a fastener in the high-pressure pump. The attachment function is essentially fulfilled by the
Das Regelventil 3 besitzt ein Ventilgehäuse 15, welches in eine Verbreiterung 17 übergeht, die zugleich den stirnseitigen Abschluss des Magnettopfes 11 bildet.The control valve 3 has a
In dem Ventilgehäuse 15 ist eine Axialbohrung 19 ausgebildet, die koaxial zu dem Ankerbolzen 9 des Elektromagneten 1 angeordnet ist. Die Axialbohrung 19 nimmt einen verschiebbaren hülsenförmigen Ventilkolben 21 auf, in dessen Innenraum eine Druckfeder 23 angeordnet ist. DieIn the
Druckfeder 23 stützt sich einenends an einem Boden 25 des Ventilkolbens 21 ab. Anderenends stützt sich die Druckfeder 23 an einem in der Axialbohrung 19 befindlichen Federteller 27 ab. An dem dem Federteller 27 abgewandten Ende des Ventilkolbens 21 steht dieser mit dem einen Ende des Ankerbolzens 9 in Anlage. Die Druckfeder 23 sorgt dafür, dass jede Stellbewegung des Ankerbolzens 9 unmittelbar auf den Ventilkolben 21 übertragen wird.
Eine Öffnung 29 im Federteller 27 verbindet den Innenraum (ohne Bezugszeichen) des Ventilkolbens 21 mit einer nicht dargestellten Vorförderpumpe des Kraftstoffeinspritzsystems.An
In dem Ventilgehäuse 15 sind mehrere radial gerichtete Steueröffnungen 31 angeordnet. Die Steueröffnungen 31 stehen mit dem Niederdruckbereich der nicht dargestellten Kraftstoffhochdruckpumpe in hydraulischer Wirkverbindung.In the valve housing 15 a plurality of radially directed
Die Strömungsrichtung von der Öffnung 29 durch den Ventilkolben 21 und die Steueröffnungen 31 kann auch umgekehrt werden. In diesem Fall wären dann die Steueröffnungen 31 mit der Druckseite der Vorförderpumpe verbunden, während die Öffnung 29 mit dem Niederdruckbereich der Hochdruckpumpe hydraulisch verbunden wäre.The flow direction from the
Die obere Hälfte der
Umgekehrt vermag die Druckfeder 23 den Ventilkolben 21 in die Öffnungsstellung zu verschieben, sobald die Bestromung des Elektromagneten 1 und damit dessen auf den Anker 7 und den Ankerbolzen 9 wirkende Magnetkraft entsprechend verringert wird.Conversely, the
In der Öffnungsstellung des Regelventils 3 strömt der dem Regelventil bei der Öffnung 29 zugeführte Kraftstoff zur Saugseite der Kraftstoffhochdruckpumpe (nicht dargestellt)In the open position of the control valve 3, the fuel supplied to the control valve at the
Im Boden 25 des Ventilkolbens 21 ist eine Ausgleichsbohrung 33 vorgesehen. Auch im Anker 7 sind Ausgleichsbohrungen 35 vorgesehen.In the
Bei der in
In dem Bereich zwischen dem Anker 7 und dem Ventilkolben 21 ist im Ventilgehäuse 15 eine erste Lagerbuchse 37 eingepresst. Die erste Lagerbuchse 37 dient dazu, den Ankerbolzen 9 und mit ihm den Anker 7 in axialer Richtung zu führen. Da der Ankerbolzen 9 aus einem verschleißfesten Material, wie beispielsweise gehärtetem Stahl, hergestellt werden kann, ist die Lagerung der beweglichen Teile des Elektromagneten 1 mit Hilfe der ersten Lagerbuchse 37 sehr langlebig und nahezu verschleißfrei. Wegen des naturgemäß kleinen Durchmessers des Ankerbolzens 9 im Vergleich zu dem Außendurchmessers des Ankers 7 ist auch die Reibung zwischen der ersten Lagerbuchse 37 und dem Ankerbolzen 9 sehr gering.In the area between the
Zur Führung des Ankerbolzens 9 und mit ihm des Ankers 7, ist auf der dem Ventilkolben 21 abgewandten Ende des Ankerbolzens 9 eine zweite Lagerbuchse 39 in den Magnettopf 11 eingepresst. Dadurch wird das Verkippen des Ankerbolzens 9 unterbunden. Durch die beidseitige Führung des Ankerbolzens 9 ist auch gewährleistet, dass der Anker 7 nicht in radialer Richtung ausweichen kann, wenn beispielsweise die von der Magnetspule 5 auf den Anker 7 ausgeübten magnetischen Kräfte eine radiale Komponenten haben. Wegen der präzisen und verschleißarmen Führung des Ankerbolzens 9 in den Lagerbuchsen 37 und 39 ist auch gewährleistet, dass der Anker 7 nicht in Kontakt mit dem Magnettopf 11 gelangt und somit auch dort weder Reibung noch Verschleiß auftreten können.To guide the
In
Claims (9)
- Fuel metering unit for the suction-side regulation of the delivery rate of the high-pressure fuel pump for an internal combustion engine, the fuel metering unit having a regulating valve (3) actuated by an electromagnet (1) and having a valve piston (21), the electromagnet (1) comprising an armature (7) and an armature bolt (9) and at least one bearing bush, a first bearing bush (37) being arranged between the armature (7) and the valve piston (21), and the first bearing bush (37) guiding the armature bolt (9) axially displaceably, characterized in that a second bearing bush (39) is arranged between the armature (7) and the valve piston (21), and in that the second bearing bush (39) guides the armature bolt (9) axially displaceably.
- Fuel metering unit according to one of the preceding claims, characterized in that the bearing bushes (37, 39) arranged between the armature (7) and valve piston (21) are fastened in a valve housing (15).
- Fuel metering unit according to one of the preceding claims, characterized in that the electromagnet (1) is designed as a solenoid plunger magnet.
- Fuel metering unit according to one of the preceding claims, characterized in that the bearing bushes (37, 39) are produced from bronze.
- Fuel metering unit according to one of the preceding claims, characterized in that the bearing bushes (37, 39) consist of plastic, in particular fuel-resistant and/or temperature-resistant plastic.
- Fuel metering unit according to one of the preceding claims, characterized in that the valve piston (21) is guided in the valve housing (15).
- Fuel metering unit according to one of the preceding claims, characterized in that the valve piston (21) is of sleeve-shaped design and receives a compression spring (23) in its inner space, and in that the compression spring (23) is supported at one end, at least indirectly, on the valve housing (15).
- Fuel metering unit according to Claim 7, characterized in that a spring plate (27) is provided in the valve housing (15), and in that the compression spring (23) is supported at one end against the spring plate (27).
- High-pressure fuel pump for a fuel injection system with at least one pump element and with a fuel metering unit for regulating the delivery rate, characterized in that the fuel metering unit is designed according to one of the preceding claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005025872A DE102005025872A1 (en) | 2005-06-06 | 2005-06-06 | Fuel metering unit for a high-pressure fuel pump and high-pressure fuel pump |
| PCT/EP2006/061419 WO2006131408A1 (en) | 2005-06-06 | 2006-04-07 | Fuel metering unit for a high-pressure fuel pump and associated high-pressure fuel pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1891323A1 EP1891323A1 (en) | 2008-02-27 |
| EP1891323B1 true EP1891323B1 (en) | 2009-11-11 |
Family
ID=36406536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06725632A Not-in-force EP1891323B1 (en) | 2005-06-06 | 2006-04-07 | Fuel metering unit for a high-pressure fuel pump and associated high-pressure fuel pump |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20080271708A1 (en) |
| EP (1) | EP1891323B1 (en) |
| JP (1) | JP2008545917A (en) |
| AT (1) | ATE448403T1 (en) |
| DE (2) | DE102005025872A1 (en) |
| WO (1) | WO2006131408A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007059855A1 (en) * | 2007-12-12 | 2009-06-25 | Robert Bosch Gmbh | Fuel metering unit for a high-pressure fuel pump and high-pressure fuel pump |
| DE102008043798A1 (en) | 2008-11-17 | 2010-05-20 | Robert Bosch Gmbh | Fuel metering unit for a fuel pump |
| DE102009028501A1 (en) | 2009-08-13 | 2011-02-17 | Robert Bosch Gmbh | Fuel metering device for a fuel injection system |
| JP6245238B2 (en) | 2015-09-11 | 2017-12-13 | トヨタ自動車株式会社 | Fuel pump |
| JP6217725B2 (en) | 2015-10-06 | 2017-10-25 | トヨタ自動車株式会社 | Fuel pump |
| CN106224621A (en) * | 2016-09-09 | 2016-12-14 | 广东意希诺科技有限公司 | Split type fuel metering valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002004977A (en) * | 2000-06-26 | 2002-01-09 | Denso Corp | Flow control device |
| US6669166B2 (en) * | 2000-07-28 | 2003-12-30 | Nippon Soken, Inc. | Electromagnetic valve |
| JP2003120845A (en) * | 2001-10-12 | 2003-04-23 | Denso Corp | Metering valve device and fuel injection pump using the same |
| US6824120B2 (en) * | 2001-11-09 | 2004-11-30 | Denso Corporation | Flow amount control device |
| JP2005299683A (en) * | 2001-11-27 | 2005-10-27 | Bosch Corp | Liquid flow control valve and needle anchor |
| DE10242219A1 (en) * | 2002-09-12 | 2004-03-25 | Robert Bosch Gmbh | Fuel metering unit for injection system has valve with flat characteristic for idling/low load, steep characteristic for partial/full load; transition between characteristics can be differentiated |
-
2005
- 2005-06-06 DE DE102005025872A patent/DE102005025872A1/en not_active Withdrawn
-
2006
- 2006-04-07 DE DE502006005349T patent/DE502006005349D1/en active Active
- 2006-04-07 EP EP06725632A patent/EP1891323B1/en not_active Not-in-force
- 2006-04-07 US US11/909,755 patent/US20080271708A1/en not_active Abandoned
- 2006-04-07 WO PCT/EP2006/061419 patent/WO2006131408A1/en active Application Filing
- 2006-04-07 JP JP2008514044A patent/JP2008545917A/en active Pending
- 2006-04-07 AT AT06725632T patent/ATE448403T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE502006005349D1 (en) | 2009-12-24 |
| WO2006131408A1 (en) | 2006-12-14 |
| JP2008545917A (en) | 2008-12-18 |
| ATE448403T1 (en) | 2009-11-15 |
| US20080271708A1 (en) | 2008-11-06 |
| DE102005025872A1 (en) | 2006-12-07 |
| EP1891323A1 (en) | 2008-02-27 |
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