EP0073968A1 - Fuel-injection pump - Google Patents

Fuel-injection pump Download PDF

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Publication number
EP0073968A1
EP0073968A1 EP82107463A EP82107463A EP0073968A1 EP 0073968 A1 EP0073968 A1 EP 0073968A1 EP 82107463 A EP82107463 A EP 82107463A EP 82107463 A EP82107463 A EP 82107463A EP 0073968 A1 EP0073968 A1 EP 0073968A1
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EP
European Patent Office
Prior art keywords
pump according
plunger
groove
pump
ring
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.)
Granted
Application number
EP82107463A
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German (de)
French (fr)
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EP0073968B1 (en
Inventor
Gérard Duplat
Jean Leblanc
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0073968A1 publication Critical patent/EP0073968A1/en
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Publication of EP0073968B1 publication Critical patent/EP0073968B1/en
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    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
    • F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
    • F02M41/063—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating the distributor and rotary valve controlling fuel passages to pumping elements being combined
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
    • F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
    • F02M41/063—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating the distributor and rotary valve controlling fuel passages to pumping elements being combined
    • F02M41/066—Arrangements for adjusting the rotary valve-distributor

Definitions

  • the invention relates to a fuel injection pump according to the preamble of claim 1.
  • a fuel injection pump is known from DE-AS 23 22 858, in which the parts causing the stroke, such as pistons, rollers, tappets and springs, are arranged individually in the bushing are. This individual arrangement is problematic because it reduces the stability of the pump and requires a repair because of the large number of individual parts.
  • the invention is based on the idea that the plunger moves on all sides and this accommodates the other parts in the manner of a cage.
  • the rigidity of the hollow cylinder i.e. the wall of the plunger is raised and that, in particular, the assembly consisting of piston, spring and plunger does not fall apart during assembly and disassembly.
  • FIG. 1 shows a diagonal section through a fuel injection pump according to section II in Figure 2;
  • Figure 2 shows an axial section in the delivery area of the pump according to section II-II in Figure 1;
  • 3 shows a diagonal section in the area of the baffle ring according to section III-III in FIG. 2;
  • FIG. 4 a section of a second variant of the impact ring;
  • FIG. 5 the plunger in a spatial representation with an elongated hole.
  • a fuel injection pump of FIGS. 1 and 2 is designed as a radial piston pump with a bushing 11 fastened in the pump housing 10, in which a slide 12 driven by a shaft, not shown, is rotatably and axially displaceably mounted.
  • a cam ring 13 has a plurality of inwardly directed cams 14 and is also driven by the shaft via a flange 15.
  • Four plungers 9 are also guided in bores 17 of the bushing 11 and have a blank cylinder 20 and a base 18 with a groove 19.
  • a roller 21 is rotatably mounted, the cross section of the groove 19 being a circular surface section with the same radius as that of the roller 21 and the depth of the groove 19 being greater than the radius of the circular surface section.
  • Each of the four plungers 9 leads in a bore 17 and is arranged coaxially with a piston 16.
  • a coil spring 22 is supported on the one hand on the bushing 11 and on the other hand on a spring plate 23 which is blown into the piston 16.
  • the piston 16 is pressed against the inside of the tappet 9, so that the roller 21 always bears against the raceway 24 of the cam ring 13.
  • a locking ring 25 made of sheet metal and produced by punching is attached to a hub 26 by means of a snap ring 27 and has a plurality of fingers 28 which are axially directed with respect to the slide 12.
  • a slot 29 is arranged parallel to the stroke direction, and in the end face of the bush 11 a total of four openings 30 are arranged such that one opening 30 corresponds to one slot 29, so that a finger 28 of the Circlip 25 engages through slot 30 in slot 29.
  • a plurality of metering bores 31 are arranged radially in the bushing 11, and a supply groove j3 in the slide 12 connects a metering bore 31 with the displacement 32 of each bore 8.
  • a distributor groove 33 'in the slide 12 connects the displacement 32 with a branch channel 38, the connection with injection nozzles, not shown.
  • FIG. 3 shows the impact ring 36 which is inserted into the annular groove 35 of the bushing 11 and which consists of two identical halves 37. Each half has an inwardly facing hook 39 and an outwardly facing hook 40, both of which can be locked together.
  • the impact ring 46 shown only in sections in FIG. 4 consists of two halves 47 and 48.
  • the two hooks 50 of one half 47 are directed radially outwards, and the two hooks 49 of the other half 48 are directed diagonally inwards, so that both halves are also lockable and form the baffle ring 46.
  • the plunger 89 in FIG. 5 has the bottom 78 with the groove 19 and the hollow cylindrical wall 80.
  • Two elongated holes 79 are formed in this at two diametrical locations, the longitudinal extent of each elongated hole 79 being arranged in the stroke direction.

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

Abstract

Der Stößel (9) einer als Radialkolbenpumpe ausgebildeten Kraftstoff-Einspritzpumpe hat in seinem Boden (18) eine die Rolle (21) in ihrer Lage sichernde Nut (19) und eine in der Buchse (11) geführte hohlzylindrische Wand (20). Deren Stirnseite weist einen Schlitz (29) auf, in den durch einen Durchbruch (30) der Buchse (11) ein Finger (28) ragt, der von einem Sicherungsring (25) in axialer Richtung absteht. Eine sich an der Buchse (11) abstützende Schraubenfeder (22) ?drückt? über einen Sprengring (27) den Kolben (16) dauernd an die Innenseite des Stößelbodens (18).The plunger (9) of a fuel injection pump designed as a radial piston pump has in its base (18) a groove (19) securing the position of the roller (21) and a hollow cylindrical wall (20) guided in the bushing (11). Its end face has a slot (29) into which a finger (28) protrudes through an opening (30) in the bushing (11) and protrudes axially from a locking ring (25). A coil spring (22) supported on the bushing (11)? via a snap ring (27) the piston (16) continuously to the inside of the tappet base (18).

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Kraftstoff-Einspritzpumpe nach der Gattung des Anspruchs 1. Eine derartige Pumpe ist aus der DE-AS 23 22 858 bekannt, bei der die den Hub bewirkenden Teile wie Kolben, Rollen, Stößel und Federn einzeln in der Buchse angeordnet sind. Diese Einzelanordnung ist deshalb problematisch, weil dadurch die Stabilität der Pumpe vermindert wird und eine Reparatur wegen der Vielzahl der Einzelteile aufwendig ist.The invention relates to a fuel injection pump according to the preamble of claim 1. Such a pump is known from DE-AS 23 22 858, in which the parts causing the stroke, such as pistons, rollers, tappets and springs, are arranged individually in the bushing are. This individual arrangement is problematic because it reduces the stability of the pump and requires a repair because of the large number of individual parts.

Vorteile der ErfindungAdvantages of the invention

Mit der Pumpe nach der Erfindung wird das im Stand der Technik dargelegte Problem im wesentlichen gelöst. Der Erfindung liegt der Gedanke zugrunde, daß sich der Stößel allseits führt und dieser die anderen Teile nach Art eines Käfigs aufnimmt.With the pump according to the invention, the problem set out in the prior art is essentially solved. The invention is based on the idea that the plunger moves on all sides and this accommodates the other parts in the manner of a cage.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Mit der Ausgestaltung der Pumpe nach Anspruch 2 wird die Funktionslage des Stößels gesichert und insbesondere dessen Rotieren um die Hubachse in einfacher Weise verhindert. Die hierfür erforderliche Sicherung läßt sich gemäß Anspruch 3 festlegen und gemäß Anspruch 4 einfach herstellen. Die Funktionslage der Rolle im Stößel wird günstig und ohne zusätzliche Teile nach Anspruch 5 erreicht. Eine einfache und sichere Zuordnung des Federtellers zum Kolben erreicht man mit Anspruch 6.Advantageous developments of the invention are described in the subclaims. With the design of the pump according to claim 2, the functional position of the tappet is secured and in particular its rotation around the stroke axis is prevented in a simple manner. The fuse required for this can be determined according to claim 3 and easily manufactured according to claim 4. The functional position of the roller in the plunger is achieved cheaply and without additional parts according to claim 5. A simple and secure assignment of the spring plate to the piston is achieved with claim 6.

Nach Einspritzende wird Kraftstoff so lange von einzelnen Hubräumen in das Gehäuseinnere der Pumpe abgesteuert, bis die Kolben den oberen Nocken-Totpunkt erreichen. Es hat sich gezeigt, daß die mit hoher Kraft austretenden Kraftstoffstrahlen vielfach eine Kavitation an der Gehäusewand hervorrufen und dadurch die Funktionstüchtigkeit der Pumpe beeinträchtigen. Mit der Ausgestaltung der Pumpe nach Anspruch 7 wird diese Kavitation mit einem einfachen Mittel vermieden. Eine leicht herstellbare und funktionssichere Verbindung beider Ringhälften ist mit Anspruch 8 gegeben. Wird der Ring nach Anspruch 9 weitergebildet, so benötigt man für beide Ringhälften nur eine Herstellform.After the end of injection, fuel is diverted from individual displacements into the interior of the pump until the pistons reach top cam dead center. It has been shown that the fuel jets escaping with high force often cause cavitation on the housing wall and thereby impair the functionality of the pump. With the design of the pump according to claim 7, this cavitation is avoided with a simple means. An easy to manufacture and reliable connection of the two halves of the ring is given with claim 8. If the ring is developed according to claim 9, only one manufacturing mold is required for both ring halves.

Mit der Weiterbildung der Pumpe nach Anspruch 11 wird erreicht, daß die Steifigkeit des Hohlzylinders, d.h. die Wand des Stößels erhöht wird und daß vor allem die aus Kolben, Feder und Stößel bestehende Baueinheit bei der Montage und Demontage nicht auseinanderfällt.With the development of the pump according to claim 11 it is achieved that the rigidity of the hollow cylinder, i.e. the wall of the plunger is raised and that, in particular, the assembly consisting of piston, spring and plunger does not fall apart during assembly and disassembly.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der folgenden Beschreibung näher erläutert. Es zeigen jeweils in natürlichem Maßstab: Figur 1 einen Diagonalschnitt durch eine Kraftstoff-Einspritzpumpe gemäß Schnitt I-I in Figur 2; Figur 2 einen Axialschnitt im Förderbereich der Pumpe nach Schnitt II-II in Figur 1; Figur 3 einen Diagonalschnitt im Bereich des Frallringes gemäß Schnittführung III-III in Figur 2; Figur 4 abschnittsweise eine zweite Variante des Prallringes; und Figur 5 den Stößel in raumbildlicher Darstellung mit Langloch.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. In each case on a natural scale: FIG. 1 shows a diagonal section through a fuel injection pump according to section II in Figure 2; Figure 2 shows an axial section in the delivery area of the pump according to section II-II in Figure 1; 3 shows a diagonal section in the area of the baffle ring according to section III-III in FIG. 2; FIG. 4 a section of a second variant of the impact ring; and FIG. 5 the plunger in a spatial representation with an elongated hole.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Eine Kraftstoff-Einspritzpumpe der Figur 1 und 2 ist als Radialkolbenpumpe ausgeführt mit einer im Pumpengehäuse 10 befestigten Buchse 11, in der ein von einer nicht gezeichneten Welle angetriebener Schieber 12 drehbar und axial verschiebbar gelagert ist. Ein Nockenring 13 hat mehrere nach innen gerichtete Nocken 14 und wird über einen Flansch 15 ebenfalls von der Welle angetrieben.A fuel injection pump of FIGS. 1 and 2 is designed as a radial piston pump with a bushing 11 fastened in the pump housing 10, in which a slide 12 driven by a shaft, not shown, is rotatably and axially displaceably mounted. A cam ring 13 has a plurality of inwardly directed cams 14 and is also driven by the shaft via a flange 15.

Insgesamt vier Kolben 16 führen auch jeweils in einer radialen Bohrung 8 der Buchse 11. Ebenfalls vier Stößel 9 sind jeweils in Bohrungen 17 der Buchse 11 geführt und weisen einen Rohlzylinder 20 und einen Boden 18 mit einer Nut 19 auf. In dieser ist eine Rolle 21 drehbar gelagert, wobei der Querschnitt der Nut 19 ein Kreisflächenabschnitt mit gleichem Radius wie der der Rolle 21 ist und die Tiefe der Nut 19 größer ist als der Radius des Kreisflächenabschnittes.A total of four pistons 16 each also lead in a radial bore 8 of the bushing 11. Four plungers 9 are also guided in bores 17 of the bushing 11 and have a blank cylinder 20 and a base 18 with a groove 19. In this a roller 21 is rotatably mounted, the cross section of the groove 19 being a circular surface section with the same radius as that of the roller 21 and the depth of the groove 19 being greater than the radius of the circular surface section.

Jedes der vier Stößel 9 führt sich in einer Bohrung 17 und ist koaxial zu einem Kolben 16 angeordnet. Eine Schraubenfeder 22 stützt sich zum einen auf der Buchse 11 und zum anderen an einem Federteller 23 ab, der im Kolben 16 eingesprengt ist. Dadurch wird der Kolben 16 an die Innenseite des Stößels 9 gedrückt, so daß die Rolle 21 stets an der Laufbahn 24 des Nockenringes 13 anliegt.Each of the four plungers 9 leads in a bore 17 and is arranged coaxially with a piston 16. A coil spring 22 is supported on the one hand on the bushing 11 and on the other hand on a spring plate 23 which is blown into the piston 16. As a result, the piston 16 is pressed against the inside of the tappet 9, so that the roller 21 always bears against the raceway 24 of the cam ring 13.

Ein aus Metallblech bestehender und durch Ziehstanzen hergestellter Sicherungsring 25 ist an einer Nabe 26 mittels eines Sprengringes 27 befestigt und hat mehrere Finger 28, die bezüglich dem Schieber 12 axial gerichtet sind. In der Stirnseite des Hohlzylinders 20 des Stößels 9 ist ein Schlitz 29 parallel zur Hubrichtung angeordnet, und in der Stirnfläche der Buchse 11 sind insgesamt vier Durchbrüche 30 derart angeordnet, daß je ein Durchbruch 30 mit einem Schlitz 29 korrespondiert, so daß ein Finger 28 des Sicherungsringes 25 durch den Durchbruch 30 hindurch in den Schlitz 29 eingreift.A locking ring 25 made of sheet metal and produced by punching is attached to a hub 26 by means of a snap ring 27 and has a plurality of fingers 28 which are axially directed with respect to the slide 12. In the end face of the hollow cylinder 20 of the plunger 9, a slot 29 is arranged parallel to the stroke direction, and in the end face of the bush 11 a total of four openings 30 are arranged such that one opening 30 corresponds to one slot 29, so that a finger 28 of the Circlip 25 engages through slot 30 in slot 29.

Mehrere Dosierbohrungen 31 sind in der Buchse 11 radial angeordnet, und eine Versorgungsnut j3 im Schieber 12 verbindet jeweils eine Dosicrbohrung 31 mit dem Hubraum 32 einer jeden Bohrung 8. Ebenso verbindet nacheinander eine Verteilernut 33' im Schieber 12 den Hubraum 32 mit einem Stichkanal 38, der Verbindung mit nicht dargestellten Einspritzdüsen hat.A plurality of metering bores 31 are arranged radially in the bushing 11, and a supply groove j3 in the slide 12 connects a metering bore 31 with the displacement 32 of each bore 8. Likewise, a distributor groove 33 'in the slide 12 connects the displacement 32 with a branch channel 38, the connection with injection nozzles, not shown.

Figur 3 zeigt den in der Ringnut 35 der Buchse 11 eingesetzten Prallring 36, der aus zwei identischen Hälften 37 besteht. Jede Hälfte hat einen nach innen weisenden Haken 39 und einen nach außen weisenden Haken 40, die beide miteinander verrastbar sind.FIG. 3 shows the impact ring 36 which is inserted into the annular groove 35 of the bushing 11 and which consists of two identical halves 37. Each half has an inwardly facing hook 39 and an outwardly facing hook 40, both of which can be locked together.

Der nur abschnittsweise dargestellte Prallring 46 in Figur 4 besteht aus zwei Hälften 47 und 48. Die beiden Haken 50 der einen Hälfte 47 sind radial nach außen gerichtet, und die beiden Haken 49 der anderen Hälfte 48 sind diagonal nach innen gerichtet, so daß beide Hälften ebenfalls verrastbar sind und den Prallring 46 bilden.The impact ring 46 shown only in sections in FIG. 4 consists of two halves 47 and 48. The two hooks 50 of one half 47 are directed radially outwards, and the two hooks 49 of the other half 48 are directed diagonally inwards, so that both halves are also lockable and form the baffle ring 46.

Der Stößel 89 in Figur 5 hat den Boden 78 mit der Nut 19 und der hohlzylindrischen Wand 80. In dieser sind zwei Langlöcher 79 an zwei diametralen Stellen ausgebildet, wobei die Längsausdehnung eines jeden Langloches 79 in Hubrichtung angeordnet ist.The plunger 89 in FIG. 5 has the bottom 78 with the groove 19 and the hollow cylindrical wall 80. Two elongated holes 79 are formed in this at two diametrical locations, the longitudinal extent of each elongated hole 79 being arranged in the stroke direction.

Claims (11)

1. Kraftstoff-Einspritzpumpe mit einem rotierenden Verteiler des Kraftstoffes zu den Einspritzdüsen und mit einem Nockenring, dessen nach innen gerichtete Nocken jeweils über eine Rolle und einen federbelasteten Stößel wenigstens einen in einem Gehäuse radial geführten Kolben durch eine relative Drehbewegung einen Pumphub erteilt, dadurch gekennzeichnet, daß jeder Stößel (9) einen Boden (18) und einen Hohlzylinder (20) aufweist und in einer Bohrung (17) geführt ist, die koaxial zu der den Kolben (16) führenden Bohrung (8) angeordnet'ist, daß an der Außenseite des Bodens (18) eine Nut (19) für die Lagesicherung der Rolle (21) ausgespart ist und daß eine innerhalb des Stößels (9) und in der Bohrung (17) angeordnete Feder (22) über einen am Kolben (16) befestigten Federteller (23) den Kolben (16) an die Innenwand des Stößelbodens (18) drückt.1. Fuel injection pump with a rotating distributor of the fuel to the injection nozzles and with a cam ring, the inwardly directed cams of which, via a roller and a spring-loaded plunger, give at least one piston which is guided radially in a housing by a relative rotary movement and a pump stroke, characterized in that that each plunger (9) has a base (18) and a hollow cylinder (20) and is guided in a bore (17) which is arranged coaxially with the bore (8) leading the piston (16), that on the Outside of the bottom (18) a groove (19) for securing the position of the roller (21) is recessed and that a spring (22) arranged inside the plunger (9) and in the bore (17) is attached to the piston (16) by means of a spring Spring plate (23) presses the piston (16) against the inner wall of the tappet base (18). 2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß ein Sicherungsring (25) mehrere axial gerichtete Finger (28) aufweist und am Gehäuse (10) befestigt ist, daß im Hohlzylinder (20) des Stößels (9) ein Schlitz (29) angeordnet ist, daß das Gehäuse (10) jeweils einen mit dem Schlitz (29) korrespondierendenDurchbruch (30) aufweist und daß ein Finger (28) durch einen Durchbruch (30) hindurch in einen Schlitz (29) eingreift.2. Pump according to claim 1, characterized in that a locking ring (25) has a plurality of axially directed fingers (28) and is attached to the housing (10) in that a slot (29) is arranged in the hollow cylinder (20) of the plunger (9) is that the housing (10) each has an opening (30) corresponding to the slot (29) and that a finger (28) engages in a slot (29) through an opening (30). 3. Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß der Sicherungsring (25) in seiner Funktionslage an einer Nabe (26) des Gehäuses (10) festgelegt ist.3. Pump according to claim 2, characterized in that the locking ring (25) is fixed in its functional position on a hub (26) of the housing (10). 4. Pumpe nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Sicherungsring (25) aus Metallblech besteht und durch Ziehszanzen hergestellt ist.4. Pump according to claim 2 or 3, characterized in that the locking ring (25) consists of sheet metal and is made by drawing punch. 5. Pumpe nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß der Querschnitt der Nut (19) im Boden (18) des Stößels (9) ein Kreisflächenabschnitt mit gleichen Radius wie der der Rolle (21) ist und daß die Tiefe der Nut (19) größer ist als der Radius des Kreisflächenabschnitts.5. Pump according to one of the preceding claims, characterized in that the cross section of the groove (19) in the bottom (18) of the plunger (9) is a circular section with the same radius as that of the roller (21) and that the depth of the groove ( 19) is greater than the radius of the circular area section. 6. Pumpe nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß der Federteller (23) im Außenmantel des Hohlzylinders (20) und nahe dem Boden (18) des Stößels (9) eingesprengt ist.6. Pump according to one of the preceding claims, characterized in that the spring plate (23) in the outer jacket of the hollow cylinder (20) and near the bottom (18) of the plunger (9) is blown. 7. Pumpe nach einem der vorgenannten Ansprüchen, dadurch gekennzeichnet, daß mehrere Bohrungen (31) in der Buchse (11) radial angeordnet sind und den Hubraum (32) über einen Kanal (33) des Schiebers (12) mit dem Innenraum (34) der Pumpe verbinden, daß im Mantel der Buchse (11) eine Ringnut (35) mittig zu den Bohrungen (31) angeordnet ist, daß der Durchmesser einer jeden Bohrung (31) größer ist als die Breite der Ringnut (35) und daß ein aus zwei Hälften (37; 47, 48) zusammengefügter Prallring (36; 46) in der Ringnut (35) eingesetzt ist.7. Pump according to one of the preceding claims, characterized in that a plurality of bores (31) in the bush (11) are arranged radially and the displacement (32) via a channel (33) of the slide (12) with the interior (34) Connect the pump that in the jacket of the bushing (11) an annular groove (35) is arranged centrally to the bores (31), that the diameter of each bore (31) is larger than the width of the annular groove (35) and that one two halves (37; 47, 48) of an assembled impact ring (36; 46) is inserted in the annular groove (35). 8. Pumpe nach Anspruch 7, dadurch gekennzeichnet, daß die beiden Enden (39, 40; 49, 50) einer jeden Hälfte (37; 47, 48) des Prallringes (36; 46) im diametralen Querschnitt derart hakenförmig ausgebildet sind, daß beide Hälften miteinander verrastbar sind.8. Pump according to claim 7, characterized in that the two ends (39, 40; 49, 50) of each half (37; 47, 48) of the baffle ring (36; 46) are of hook-shaped design in diametrical cross section such that both Halves can be locked together. 9. Pumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß jeder der beiden Hälften (377 insbesondere im Bereich der Haken (39, 40) identisch sind, so daß der eine Haken (40) radial nach außen und der andere Haken (39) radial nach innen gerichtet ist.9. Pump according to claim 7 or 8, characterized in that each of the two halves (377, in particular in the region of the hooks (39, 40) are identical, so that one hook (40) radially outwards and the other hook (39) is directed radially inwards. 10. Pumpe nach Anspruch 8, dadurch gekennzeichnet, daß die beiden hakenförmigen Enden (50) der einen Ringhälfte (47) und die beiden hakenförmigen Enden (49) der anderen Hälfte (48) nach innen gerichtet sind.10. Pump according to claim 8, characterized in that the two hook-shaped ends (50) of one ring half (47) and the two hook-shaped ends (49) of the other half (48) are directed inwards. 11. Pumpe nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß im Stößel (89) die Nut als Langloch (79) an diametralen Stellen ausgebildet ist, wobei die Längsausdehnung des Langloches (79) parallel zur Hubrichtung angeordnet ist.11. Pump according to one of claims 2 to 4, characterized in that in the tappet (89) the groove is designed as an elongated hole (79) at diametrical locations, the longitudinal extent of the elongated hole (79) being arranged parallel to the stroke direction.
EP82107463A 1981-09-04 1982-08-17 Fuel-injection pump Expired EP0073968B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3135045 1981-09-04
DE3135045 1981-09-04
DE19813146625 DE3146625A1 (en) 1981-09-04 1981-11-25 FUEL INJECTION PUMP
DE3146625 1981-11-25

Publications (2)

Publication Number Publication Date
EP0073968A1 true EP0073968A1 (en) 1983-03-16
EP0073968B1 EP0073968B1 (en) 1985-06-05

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EP82107463A Expired EP0073968B1 (en) 1981-09-04 1982-08-17 Fuel-injection pump

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US (1) US4486154A (en)
EP (1) EP0073968B1 (en)
DE (2) DE3146625A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564341A (en) * 1983-05-04 1986-01-14 Nissan Motor Company, Limited Fuel injection pump for an internal combustion engine
EP0561505A1 (en) * 1992-03-20 1993-09-22 Lucas Industries Public Limited Company Fuel pump

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GB8410280D0 (en) * 1984-04-19 1984-05-31 Lumber P M P Rotary distributor pump
DE3437973A1 (en) * 1984-10-17 1986-04-17 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE3816508A1 (en) * 1988-05-14 1989-11-23 Bosch Gmbh Robert FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINE
US5046931A (en) * 1990-07-09 1991-09-10 Allied-Signal Inc. Radial gear driven piston pump
DE10041318A1 (en) * 2000-08-23 2002-03-07 Mannesmann Rexroth Ag Hydraulic radial piston machine

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US3267861A (en) * 1963-11-21 1966-08-23 Sigma Fuel injection pumps comprising a distributing valve for use with five cylinders intenal combustion engines
FR2184153A5 (en) * 1972-05-08 1973-12-21 Sigma

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FR2184153A5 (en) * 1972-05-08 1973-12-21 Sigma

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564341A (en) * 1983-05-04 1986-01-14 Nissan Motor Company, Limited Fuel injection pump for an internal combustion engine
EP0561505A1 (en) * 1992-03-20 1993-09-22 Lucas Industries Public Limited Company Fuel pump
US5340284A (en) * 1992-03-20 1994-08-23 Lucas Industries Public Limited Company Two stage fuel pump with pressure passage in the first stage rotor

Also Published As

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US4486154A (en) 1984-12-04
DE3264049D1 (en) 1985-07-11
DE3146625A1 (en) 1983-03-17
EP0073968B1 (en) 1985-06-05

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