EP1307649B1 - Fuel injection pump - Google Patents

Fuel injection pump Download PDF

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Publication number
EP1307649B1
EP1307649B1 EP01956308A EP01956308A EP1307649B1 EP 1307649 B1 EP1307649 B1 EP 1307649B1 EP 01956308 A EP01956308 A EP 01956308A EP 01956308 A EP01956308 A EP 01956308A EP 1307649 B1 EP1307649 B1 EP 1307649B1
Authority
EP
European Patent Office
Prior art keywords
fuel
filling piece
injection pump
fuel injection
filler
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
Application number
EP01956308A
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German (de)
French (fr)
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EP1307649A1 (en
Inventor
Werner Fischer
Joerg-Peter Fischer
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1307649A1 publication Critical patent/EP1307649A1/en
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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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/30—Circuit boards

Definitions

  • the invention relates to a fuel injection pump for internal combustion engines according to the preamble of claim 1.
  • a high-pressure fuel pump in which a cavity is formed between a pump housing and a control unit housing, which is flowed through by fuel.
  • a filler is present, which meanders the fuel through the cavity and the control unit housing along the fuel.
  • the object of the invention is to ensure adequate cooling of the control unit housing, without that contained in the interior of the control unit housing electronic components are lapped by fuel.
  • the object is achieved in a fuel injection pump for internal combustion engines according to the preamble of claim 1, characterized in that in the control unit housing facing surface (1) of the Greiers an inlet tulip (18) is formed in the installed state of the filler with the connecting line in the pump housing in Connection stands.
  • the invention in the facing the control unit housing surface of the filler inlet cup, which is in the installed state of the filler with the connecting line in the pump housing in conjunction acts as a funnel and ensures that the fuel is sucked up and the formation of air bubbles is prevented. Nevertheless, existing air in the cavity is distributed by means of the filler according to the invention in the smallest units in the sucked fuel. This ensures that the underside of the control unit housing is continuously wetted with fuel during operation, resulting in a significantly improved cooling effect.
  • a particular embodiment of the invention is characterized in that a mask is formed on the filler, which surrounds the fuel inlet in the pump housing in the installed state of the filler.
  • the mask ensures that the fuel passes from the fuel inlet into the deflection channel. Through the mask prevents the fuel in the form of a kind of short-circuit flow passes directly from the fuel inlet to the connecting line.
  • Another particular embodiment of the invention is characterized in that the deflection channel starts from a tab which is formed on the filler piece and is received in the installed state of the filler in a pocket, which is excluded in the pump housing in the region of the fuel inlet. This improves the effect of the mask on the one hand.
  • the tabs accommodated in the pockets serve the filling piece in the to keep the built-in state in position.
  • Another particular embodiment of the invention is characterized in that all provided in the filler fuel channels are formed so that they have a low flow resistance. This ensures that the pressure loss through the filler is kept as low as possible.
  • Another particular embodiment of the invention is characterized in that the inlet of the connecting line is funnel-shaped in the pump housing. As a result, the pressure loss is kept low.
  • Another particular embodiment of the invention is characterized in that two deflection channels are provided on opposite sides of the filler. This provides the advantage that the filler can be connected on two opposite sides of the pump housing.
  • Another particular embodiment of the invention is are. By dividing the underside of the filler into a plurality of chambers, it is achieved that the size of the air volumes possibly trapped in the cavity is reduced to a harmless value.
  • the filler shown in perspective in Figure 1 is received in a cavity formed between the top of the pump housing and the underside of the control unit housing of an injection pump according to the invention.
  • the cavity opens a fuel inlet, passes through the fuel from a fuel tank into the cavity.
  • the fuel can be conveyed either by means of a feed pump in the cavity, or be sucked alone by the feed pump of the injection pump.
  • From the cavity leads a connecting line to the conveyor of the injection pump.
  • the opening for the connecting line is be promoted, or be sucked alone by the feed pump of the injection pump.
  • From the cavity leads a connecting line to the conveyor of the injection pump.
  • the opening for the connecting line is arranged in the cavity above the opening for the fuel inlet.
  • the cavity is constantly filled with fuel to a certain level. In operation, it can not be avoided that there is also a certain amount of air in the cavity.
  • the cavity is limited by the pump housing of the injection pump.
  • the cavity is bounded by the underside of a controller housing. The control unit housing is used to hold electronic components that heat up during operation.
  • the filler shown in Figure 1 is received in the installed state in the cavity that its top 1 is turned to the bottom of the control unit housing.
  • the top 1 of the filler is usually arranged horizontally when installed. From the top 1 of the filler, eight flat side surfaces 2 to 9 extend substantially in the vertical direction. In the flat side surface 9 of the filler a deflection channel 11 is excluded. In the flat side surface 5 of the filler a deflection channel 12 is excluded.
  • the deflection channel 11 extends from a tab 13, which serves to position the filler, to the top 1 of the filler.
  • the deflection channel 12 extends from a tab 14 also to the top 1 of the filler.
  • a mask 15 is formed, which surrounds the inlet opening of the fuel inlet in the cavity in the installed state.
  • a corresponding mask is formed on the tab 14.
  • an inlet tulip 18 is formed in the middle of the top 1 of the filler.
  • the inlet tulip 18 is connected via a connecting pipe 19 with a fuel outlet opening 20 in connection.
  • the fuel outlet opening 20 is arranged in the installed state of the filler in the region of the inlet of the connecting line to the conveying device of the injection pump.
  • the fuel outlet opening 20 is located on a chamfered surface 21 of the filler. Due to the overhead arrangement of the inlet top, accumulated air is continuously removed, thus ensuring that the underside of the control unit housing remains wetted with fuel. Due to the funnel-shaped configuration of the inlet tulip, a low flow resistance for the fuel is also achieved.
  • the fixing pins 25 and 26 serve to fix the filler in the installed state in the cavity.
  • the filler is divided into a plurality of cuboid chambers 30, 31, which are open at the bottom.
  • the chambers 30, 31 are formed by vertically extending partitions, which are arranged perpendicular to each other.
  • the filling of the invention the continuation of the fuel between the pump housing and the controller housing is guaranteed.
  • the pressure drop is minimized.
  • inventive design of the filler ensures that air is continuously sucked out of the cavity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Kraftstoffeinspritzpumpe für Brennkraftmaschinen nach dem Oberbegriff des Anspruchs 1.The invention relates to a fuel injection pump for internal combustion engines according to the preamble of claim 1.

Aus der DE-OS 34 03073 A1 ist eine Einspritzpumpe bekannt bei der der zu fördernde Kraftstoff zur Kühlung durch das Steuergerätgehäuse geleitet wird. In der Praxis hat sich die Erwärmung von elektrischen Bauteilen in dem Steuergerätgehäuse als problematisch erwiesen.From DE-OS 34 03073 A1 an injection pump is known in which the fuel to be delivered is passed for cooling by the control unit housing. In practice, the heating of electrical components in the controller housing has proven to be problematic.

Aus der US 4,763,611 ist eine Kraftstoffhochdruckpumpe bekannt, bei der zwischen einem Pumpengehäuse und einem Steuergerätgehäuse ein Hohlraum ausgebildet ist, der von Kraftstoff durchströmt wird. In dem Hohlraum ist ein Füllstück vorhanden, welches den Kraftstoff mäanderförmig durch den Hohlraum und am Steuergerätgehäuse entlang führt.From US 4,763,611 a high-pressure fuel pump is known in which a cavity is formed between a pump housing and a control unit housing, which is flowed through by fuel. In the cavity, a filler is present, which meanders the fuel through the cavity and the control unit housing along the fuel.

Aufgabe der Erfindung ist es, eine ausreichende Kühlung des Steuergerätgehäuses zu gewährleisten, ohne dass im Inneren des Steuergerätgehäuses enthaltene elektronische Bauteile von Kraftstoff umspült werden.The object of the invention is to ensure adequate cooling of the control unit housing, without that contained in the interior of the control unit housing electronic components are lapped by fuel.

Die Aufgabe ist bei einer Kraftstoffeinspritzpumpe für Brennkraftmaschinen nach dem Oberbegriff des Anspruchs 1, dadurch gelöst, dass in der zum Steuergerätgehäuse gewandten Oberfläche (1) des Füllstücks eine Einlauftulpe (18) ausgebildet ist, die im eingebauten Zustand des Füllstücks mit der Verbindungsleitung im Pumpengehäuse in Verbindung steht.The object is achieved in a fuel injection pump for internal combustion engines according to the preamble of claim 1, characterized in that in the control unit housing facing surface (1) of the Füllstücks an inlet tulip (18) is formed in the installed state of the filler with the connecting line in the pump housing in Connection stands.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße in der zum Steuergerätgehäuse gewandten Oberfläche des Füllstücks ausgebildete Einlauftulpe, die im eingebauten Zustand des Füllstücks mit der Verbindungsleitung im Pumpengehäuse in Verbindung steht, wirkt als Trichter und sorgt dafür, dass der Kraftstoff oben angesaugt und die Bildung von Luftblasen verhindert wird. Dennoch in dem Hohlraum vorhandene Luft wird mit Hilfe des erfindungsgemäßen Füllstücks in kleinsten Einheiten in dem angesaugten Kraftstoff verteilt. Dadurch wird erreicht, dass die Unterseite des Steuergerätgehäuses im Betrieb kontinuierlich mit Kraftstoff benetzt wird, was zu einer erheblich verbesserten Kühlwirkung führt.The invention in the facing the control unit housing surface of the filler inlet cup, which is in the installed state of the filler with the connecting line in the pump housing in conjunction acts as a funnel and ensures that the fuel is sucked up and the formation of air bubbles is prevented. Nevertheless, existing air in the cavity is distributed by means of the filler according to the invention in the smallest units in the sucked fuel. This ensures that the underside of the control unit housing is continuously wetted with fuel during operation, resulting in a significantly improved cooling effect.

Eine besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass an dem Füllstück eine Maske ausgebildet ist, die im eingebauten Zustand des Füllstücks den Kraftstoffzulauf im Pumpengehäuse umgibt. Die Maske sorgt dafür, dass der Kraftstoff aus dem Kraftstoffzulauf in den Umlenkkanal gelangt. Durch die Maske wird verhindert, dass der Kraftstoff in Form einer Art Kurzschlussströmung auf direktem Weg von dem Kraftstoffzulauf zu der Verbindungsleitung gelangt.A particular embodiment of the invention is characterized in that a mask is formed on the filler, which surrounds the fuel inlet in the pump housing in the installed state of the filler. The mask ensures that the fuel passes from the fuel inlet into the deflection channel. Through the mask prevents the fuel in the form of a kind of short-circuit flow passes directly from the fuel inlet to the connecting line.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass der Umlenkkanal von einer Lasche ausgeht, die an dem Füllstück ausgebildet ist und im eingebauten Zustand des Füllstücks in einer Tasche aufgenommen ist, die im Bereich des Kraftstoffzulaufs im Pumpengehäuse ausgenommen ist. Dadurch wird zum einen die Wirkung der Maske verbessert. Zum anderen dienen die in den Taschen aufgenommenen Laschen dazu, das Füllstück im eingebauten Zustand in Position zu halten.Another particular embodiment of the invention is characterized in that the deflection channel starts from a tab which is formed on the filler piece and is received in the installed state of the filler in a pocket, which is excluded in the pump housing in the region of the fuel inlet. This improves the effect of the mask on the one hand. On the other hand, the tabs accommodated in the pockets serve the filling piece in the to keep the built-in state in position.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet ,dass sämtliche in dem Füllstück vorgesehenen Kraftstoffkanäle so ausgebildet sind, dass sie einen geringen Strömungswiderstand aufweisen. Dadurch wird gewährleistet, dass der Druckverlust durch das Füllstück so gering wie möglich gehalten wird.Another particular embodiment of the invention is characterized in that all provided in the filler fuel channels are formed so that they have a low flow resistance. This ensures that the pressure loss through the filler is kept as low as possible.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass der Einlauf der Verbindungsleitung im Pumpengehäuse trichterförmig ausgebildet ist. Dadurch wird der Druckverlust gering gehalten.Another particular embodiment of the invention is characterized in that the inlet of the connecting line is funnel-shaped in the pump housing. As a result, the pressure loss is kept low.

Eine weitere besondere Ausführungsart der Erfindung ist dadurch gekennzeichnet, dass zwei Umlenkkanäle auf entgegengesetzten Seiten des Füllstücks vorgesehen sind. Das liefert den Vorteil, dass das Füllstück auf zwei gegenüberliegenden Seiten des Pumpengehäuses angeschlossen werden kann.Another particular embodiment of the invention is characterized in that two deflection channels are provided on opposite sides of the filler. This provides the advantage that the filler can be connected on two opposite sides of the pump housing.

Eine weitere besondere Ausführungsart der Erfindung ist sind. Durch die Unterteilung der Unterseite des Füllstücks in eine Vielzahl von Kammern wird erreicht, dass die Größe der eventuell in dem Hohlraum eingeschlossenen Luftvolumina auf einen unbedenklichen Wert reduziert wird.Another particular embodiment of the invention is are. By dividing the underside of the filler into a plurality of chambers, it is achieved that the size of the air volumes possibly trapped in the cavity is reduced to a harmless value.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein Ausführungsbeispiel der Erfindung im Einzelnen beschrieben ist. Dabei können die in den Ansprüchen und in der Beschreibung erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawing, an embodiment of the invention is described in detail. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.

Zeichnungdrawing

In der Zeichnung zeigen:

Figur 1
eine perspektivische Darstellung eines erfindungsgemäßen Füllstücks;
Figur 2
eine Rückansicht des Füllstücks aus Figur 1; und
Figur 3
eine Untersicht des Füllstücks aus Figur 1.
In the drawing show:
FIG. 1
a perspective view of a filler according to the invention;
FIG. 2
a rear view of the filler of Figure 1; and
FIG. 3
a bottom view of the filler of Figure 1.

Das in Figur 1 perspektivisch dargestellte Füllstück wird in einem Hohlraum aufgenommen, der zwischen der Oberseite des Pumpengehäuses und der Unterseite des Steuergerätgehäuses einer erfindungsgemäßen Einspritzpumpe ausgebildet ist. In den Hohlraum mündet ein Kraftstoffzulauf, durch den Kraftstoff aus einem Kraftstofftank in den Hohlraum gelangt. Der Kraftstoff kann entweder mit Hilfe einer Vorförderpumpe in dem Hohlraum gefördert werden, oder allein durch die Förderpumpe der Einspritzpumpe angesaugt werden. Von dem Hohlraum führt eine Verbindungsleitung zu der Fördereinrichtung der Einspritzpumpe. Die Öffnung für die Verbindungsleitung ist gefördert werden, oder allein durch die Förderpumpe der Einspritzpumpe angesaugt werden. Von dem Hohlraum führt eine Verbindungsleitung zu der Fördereinrichtung der Einspritzpumpe. Die Öffnung für die Verbindungsleitung ist in dem Hohlraum oberhalb der Öffnung für den Kraftstoffzulauf angeordnet. Dadurch wird erreicht, dass der Hohlraum ständig bis zu einem gewissen Niveau mit Kraftstoff gefüllt ist. Im Betrieb ist nicht zu vermeiden, dass sich in dem Hohlraum auch eine gewisse Menge Luft befindet. Nach unten hin wird der Hohlraum von dem Pumpengehäuse der Einspritzpumpe begrenzt. Nach oben hin wird der Hohlraum durch die Unterseite eines Steuergerätgehäuses begrenzt. Das Steuergerätgehäuse dient zur Aufnahme von elektronischen Bauteilen, die sich im Betrieb erwärmen.The filler shown in perspective in Figure 1 is received in a cavity formed between the top of the pump housing and the underside of the control unit housing of an injection pump according to the invention. In the cavity opens a fuel inlet, passes through the fuel from a fuel tank into the cavity. The fuel can be conveyed either by means of a feed pump in the cavity, or be sucked alone by the feed pump of the injection pump. From the cavity leads a connecting line to the conveyor of the injection pump. The opening for the connecting line is be promoted, or be sucked alone by the feed pump of the injection pump. From the cavity leads a connecting line to the conveyor of the injection pump. The opening for the connecting line is arranged in the cavity above the opening for the fuel inlet. This ensures that the cavity is constantly filled with fuel to a certain level. In operation, it can not be avoided that there is also a certain amount of air in the cavity. At the bottom, the cavity is limited by the pump housing of the injection pump. At the top, the cavity is bounded by the underside of a controller housing. The control unit housing is used to hold electronic components that heat up during operation.

Das in Figur 1 dargestellte Füllstück ist im eingebauten Zustand so in dem Hohlraum aufgenommen, dass seine Oberseite 1 zur Unterseite des Steuergerätgehäuse gewandt ist. Die Oberseite 1 des Füllstücks ist im eingebauten Zustand in der Regel horizontal angeordnet. Von der Oberseite 1 des Füllstücks erstrecken sich acht ebene Seitenflächen 2 bis 9 im Wesentlichen in vertikaler Richtung. In der ebenen Seitenfläche 9 des Füllstücks ist ein Umlenkkanal 11 ausgenommen. In der ebenen Seitenfläche 5 des Füllstücks ist ein Umlenkkanal 12 ausgenommen. Der Umlenkkanal 11 erstreckt sich von einer Lasche 13, die zur Positionierung des Füllstücks dient, bis zur Oberseite 1 des Füllstücks. Der Umlenkkanal 12 erstreckt sich von einer Lasche 14 ebenfalls bis zur Oberseite 1 des Füllstücks. An der Lasche 13 ist eine Maske 15 ausgebildet, die im eingebauten Zustand die Eintrittsöffnung des Kraftstoffzulaufs in dem Hohlraum umgibt. Eine entsprechende Maske ist an der Lasche 14 ausgebildet. Durch die Umlenkkanäle 11 und 12 wird der in den Hohlraum Steuergeräts trifft über der, der elektronische Baustein mit der größten Wärmeverlustleistung sitzt. Mittels Korrektion wird die Wärme abgeführt.The filler shown in Figure 1 is received in the installed state in the cavity that its top 1 is turned to the bottom of the control unit housing. The top 1 of the filler is usually arranged horizontally when installed. From the top 1 of the filler, eight flat side surfaces 2 to 9 extend substantially in the vertical direction. In the flat side surface 9 of the filler a deflection channel 11 is excluded. In the flat side surface 5 of the filler a deflection channel 12 is excluded. The deflection channel 11 extends from a tab 13, which serves to position the filler, to the top 1 of the filler. The deflection channel 12 extends from a tab 14 also to the top 1 of the filler. At the tab 13, a mask 15 is formed, which surrounds the inlet opening of the fuel inlet in the cavity in the installed state. A corresponding mask is formed on the tab 14. Through the deflection channels 11 and 12 is in the cavity Control unit meets the one that has the electronic component with the highest heat loss performance. By means of correction the heat is dissipated.

In der Mitte der Oberseite 1 des Füllstücks ist eine Einlauftulpe 18 ausgebildet. Die Einlauftulpe 18 steht über ein Verbindungsrohr 19 mit einer Kraftstoffaustrittsöffnung 20 in Verbindung.. Die Kraftstoffaustrittsöffnung 20 ist im eingebauten Zustand des Füllstücks im Bereich des Einlaufs der Verbindungsleitung zur Fördereinrichtung der Einspritzpumpe angeordnet. Die Kraftstoffaustrittsöffnung 20 befindet sich an einer abgeschrägten Fläche 21 des Füllstücks. Durch die obenliegende Anordnung der Einlauftulpe wird oben angesammelte Luft kontinuierlich abgeführt und damit gewährleistet, dass die Unterseite des Steuergerätgehäuses mit Kraftstoff benetzt bleibt. Durch die trichterförmige Ausgestaltung der Einlauftulpe wird darüberhinaus ein geringer Strömungswiderstand für den Kraftstoff erzielt.In the middle of the top 1 of the filler an inlet tulip 18 is formed. The inlet tulip 18 is connected via a connecting pipe 19 with a fuel outlet opening 20 in connection. The fuel outlet opening 20 is arranged in the installed state of the filler in the region of the inlet of the connecting line to the conveying device of the injection pump. The fuel outlet opening 20 is located on a chamfered surface 21 of the filler. Due to the overhead arrangement of the inlet top, accumulated air is continuously removed, thus ensuring that the underside of the control unit housing remains wetted with fuel. Due to the funnel-shaped configuration of the inlet tulip, a low flow resistance for the fuel is also achieved.

Aus der Unterseite des Füllstücks ragen zwei Fixierstifte 25 und 26 heraus, die am Ende geschlitzt ausgebildet sind. Die Fixierstifte 25 und 26 dienen dazu, das Füllstück im eingebauten Zustand in dem Hohlraum zu fixieren.From the bottom of the filler protrude two fixing pins 25 and 26, which are formed slotted at the end. The fixing pins 25 and 26 serve to fix the filler in the installed state in the cavity.

In der in Figur 3 dargestellten Untersicht sieht man, dass das Füllstück in eine Vielzahl quaderförmiger Kammern 30, 31 unterteilt ist, die nach unten hin offen sind. Die Kammern 30, 31 werden von vertikal verlaufenden Trennwänden gebildet, die senkrecht zueinander angeordnet sind.In the bottom view shown in Figure 3 it can be seen that the filler is divided into a plurality of cuboid chambers 30, 31, which are open at the bottom. The chambers 30, 31 are formed by vertically extending partitions, which are arranged perpendicular to each other.

Durch das erfindungsgemäße Füllstück wird die Weiterführung des Kraftstoffs zwischen dem Pumpengehäuse und dem Steuergerätgehäuse gewährleistet. Dabei wird der Druckabfall minimiert. Außerdem wird durch die erfindungsgemäße Ausgestaltung des Füllstücks gewährleistet, dass kontinuierlich Luft aus dem Hohlraum abgesaugt wird.The filling of the invention, the continuation of the fuel between the pump housing and the controller housing is guaranteed. The pressure drop is minimized. In addition, by the inventive design of the filler ensures that air is continuously sucked out of the cavity.

Im eingebauten Zustand des Füllstücks fließt ein Kraftstoffstrom von dem Kraftstoffzulauf in den Zwischenraum, der zwischen der Unterseite des Steuergerätgehäuses und der Oberseite des Füllstücks ausgebildet ist. In diesem Zwischenraum entfaltet der Krafstoff seine Kühlwirkung. Von dem Zwischenraum gelangt der Kraftstoff über die Einlauftulpe 18 und das Verbindungsrohr 19 zu der (nicht dargestellten) Verbindungsleitung zur Fördereinrichtung der Einspritzpumpe. Durch die erfindungsgemäße Ausgestaltung des Füllstückes in der Art, dass der Kraftstoff über den höchsten Punkt mittels einer Einlauftulpe abgesaugt wird oder zumindest über die Einlauftulpe abgesaugt wird oder zumindestens über die Einlauftulpe nur abfließen kann, ist gewährleistet, dass der Hohlraum mindestens bis zur Oberseite 1 des Füllstücks gefüllt ist.In the installed state of the filler, a fuel flow from the fuel inlet into the gap, which is formed between the underside of the controller housing and the top of the filler. In this space, the fuel unfolds its cooling effect. From the intermediate space, the fuel passes via the inlet tulip 18 and the connecting tube 19 to the connecting line (not shown) to the delivery device of the injection pump. Due to the inventive design of the filler in the way that the fuel is sucked over the highest point by means of an inlet tulip or at least sucked through the inlet tulip or at least over the inlet tulip can only flow, it is ensured that the cavity at least up to the top 1 of the Filler is filled.

Claims (7)

  1. Fuel injection pump for combustion engines, with a pump casing, which accommodates a conveying device, the operation of which is controlled with the aid of a control apparatus accommodated in a control apparatus housing which is mounted on the pump casing, there being formed between the top side of the pump casing and the underside of the control apparatus housing a cavity, into which a fuel inflow issues and from which a connecting line for the conveying device emanates, the cavity having arranged in it a filling piece with at least one deflecting duct (11), via which the conveyed fuel passes from the fuel inflow to the underside of the control apparatus housing, characterized in that, in that surface (1) of the filling piece which faces the control apparatus housing, a tulip-shaped entry (18) is formed, which, in the installed state of the filling piece, is connected to the connecting line in the pump casing.
  2. Fuel injection pump according to Claim 1, characterized in that the filling piece has formed on it a mask (15) which, in the installed state of the filling piece, surrounds the fuel inflow in the pump casing.
  3. Fuel injection pump according to one of the preceding claims, characterized in that the at least one deflecting duct (11, 12) emanates from a tab (13, 14) which is formed on the filling piece and, in the installed state of the filling piece, is received in a pocket which is cut out in the pump casing in the region of the fuel inflow.
  4. Fuel injection pump according to one of the preceding claims, characterized in that all the fuel ducts (11, 12, 19) provided in the filling piece are designed in such a way that they have a low flow resistance.
  5. Fuel injection pump according to one of the preceding claims, characterized in that the entry of the connecting line in the pump casing is of funnel-shaped design.
  6. Fuel injection pump according to one of the preceding claims, characterized in that two deflecting ducts (11, 12) are provided on opposite sides of the filling piece.
  7. Fuel injection pump according to one of the preceding claims, characterized in that a plurality of downwardly open chambers (30, 31) are formed in that surface of the filling piece which faces the pump casing in the installed state of the filling piece.
EP01956308A 2000-08-03 2001-07-11 Fuel injection pump Expired - Lifetime EP1307649B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10037799A DE10037799C2 (en) 2000-08-03 2000-08-03 Fuel injection pump
DE10037799 2000-08-03
PCT/DE2001/002592 WO2002012715A1 (en) 2000-08-03 2001-07-11 Fuel injection pump

Publications (2)

Publication Number Publication Date
EP1307649A1 EP1307649A1 (en) 2003-05-07
EP1307649B1 true EP1307649B1 (en) 2006-06-14

Family

ID=7651161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01956308A Expired - Lifetime EP1307649B1 (en) 2000-08-03 2001-07-11 Fuel injection pump

Country Status (7)

Country Link
US (1) US20030039567A1 (en)
EP (1) EP1307649B1 (en)
JP (1) JP2004506133A (en)
CN (1) CN1273727C (en)
DE (2) DE10037799C2 (en)
RU (1) RU2268389C2 (en)
WO (1) WO2002012715A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005215B4 (en) * 2006-02-06 2017-08-17 Robert Bosch Gmbh Assembly with a control unit housing and a pump housing
DE102006005183B4 (en) * 2006-02-06 2014-12-24 Robert Bosch Gmbh Assembly with a control unit housing and a pump housing
CN103104562B (en) * 2013-01-28 2015-03-25 浙江瑞丰五福气动工具有限公司 Pump head cover used for oil injector
AU2018244799B2 (en) 2017-03-30 2023-07-27 Innospec Limited Method and use

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532893A (en) * 1982-09-30 1985-08-06 Cummins Engine Company, Inc. Electronically controlled fuel pump
GB8326354D0 (en) * 1983-10-01 1983-11-02 Lucas Ind Plc Fuel pumping apparatus
JPS6288876U (en) * 1985-11-22 1987-06-06
DE3703073A1 (en) * 1987-02-03 1988-08-11 Bosch Gmbh Robert FUEL INJECTION PUMP

Also Published As

Publication number Publication date
US20030039567A1 (en) 2003-02-27
DE50110164D1 (en) 2006-07-27
CN1386167A (en) 2002-12-18
WO2002012715A1 (en) 2002-02-14
EP1307649A1 (en) 2003-05-07
RU2268389C2 (en) 2006-01-20
CN1273727C (en) 2006-09-06
DE10037799A1 (en) 2002-02-21
DE10037799C2 (en) 2003-01-09
JP2004506133A (en) 2004-02-26

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