EP0609519B1 - Fuel injection pump for an internal combustion engine - Google Patents

Fuel injection pump for an internal combustion engine Download PDF

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Publication number
EP0609519B1
EP0609519B1 EP93119662A EP93119662A EP0609519B1 EP 0609519 B1 EP0609519 B1 EP 0609519B1 EP 93119662 A EP93119662 A EP 93119662A EP 93119662 A EP93119662 A EP 93119662A EP 0609519 B1 EP0609519 B1 EP 0609519B1
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EP
European Patent Office
Prior art keywords
lever
fuel injection
finger
injection pump
slot
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
EP93119662A
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German (de)
French (fr)
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EP0609519A1 (en
Inventor
Siegfried Haberland
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages
    • F02M41/126—Variably-timed valves controlling fuel passages valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a fuel injection pump for internal combustion engines, in particular diesel engines, with a plurality of pivotally mounted pivoting levers serving for operation, in particular an adjusting lever, a starting lever and a tensioning lever, at least two of which pivoting levers are mounted on a common axis and at least one, in particular the adjustment lever is secured against axial displacement relative to the pump body, for example by a spring load, at least one pivot lever being secured against axial displacement relative to the pivot lever secured against axial displacement relative to the pump body.
  • Such an injection pump has become known, for example, from DE-OS 36 44 584. In such known injection pumps, the swivel levers are secured against axial displacement by means of spacers.
  • the invention aims to reduce the axial play of the pivot levers and consists essentially in that of the pivot levers secured relative to one another against axial displacement, one has a slot or an elongated hole or a groove which is perpendicular to the axis and in which or in which a finger engages at least one other pivot lever. Since the axial securing is now carried out at a greater distance from the axis the axial play of the swivel levers can be largely reduced. An axial play of only 0.1 mm to a maximum of 0.3 mm can be achieved, and the precision of the injection process can be increased to a sufficient extent. Apart from this, there is no need to assemble the spacers or spacers.
  • the finger can be formed by a tongue punched out of the sheet metal and possibly bent at a right angle.
  • a punched-out tongue can be manufactured very precisely at the current state of the punching technology and a slot or slot can also be punched precisely.
  • An axial displacement of the relevant pivot levers relative to one another can therefore be minimized and a very high precision of the injection can thus be achieved. This is of great importance, in particular when the start lever is secured relative to the adjusting lever.
  • the adjusting lever can have the guide or guides formed by a slot, slot or groove, in which the finger of the starting lever or finger lever and / or clamping lever engages.
  • the adjusting lever can also have the finger, which engages in the guide or guides of the starting lever or rocker arm and / or clamping lever formed by the slot, slot or groove.
  • the finger can also be designed as an additional part and welded or soldered to the lever. In the end, the finger can also be designed as a press-in part.
  • FIG. 1 shows a distributor fuel injection pump according to the prior art.
  • 2 shows an embodiment of the invention in which two pivot levers are secured relative to one another against axial displacement and
  • FIG. 3 shows an embodiment of the invention in which three pivot levers are secured relative to one another against axial displacement.
  • FIG. 1 In the prior art distributor fuel injection pump shown in FIG. 1 is in a housing 1 a bushing 2 is arranged, in the inner bore 3 of which forms a pump cylinder, a pump piston 4 executes a reciprocating and at the same time rotating movement driven by a cam drive.
  • the pump piston encloses a pump working chamber 6 on one end face and partially protrudes out of the inner bore 3 into a pump suction chamber 7, which is enclosed in the housing 1.
  • the pump working chamber 6 is supplied with fuel via longitudinal grooves 8 arranged in the lateral surface of the pump piston and a suction bore 9 which extends radially through the bushing 2 and runs in the housing 1 and extends from the pump suction chamber 7, as long as the pump piston assumes its suction stroke or its bottom dead center position .
  • the pump suction chamber is supplied with fuel via a feed pump 11 from a fuel tank, not shown here.
  • a quantity adjusting element in the form of a ring slide 18 is arranged on the pump piston, which slides tightly with the outer surface of its inner ring on the pump piston, is rotatable and displaceable, and with the first control edge 19 formed by the outer surface and an upper end face, the first outlet openings 16 controls.
  • a radial bore 20 branches off from the relief channel 14, which preferably runs coaxially with the pump piston axis, which leads to a distributor opening 21 on the circumference of the pump piston.
  • feed lines 22 branch off in a radial plane from the inner bore 3 and are arranged distributed around the circumference of the inner bore 3 in accordance with the number of cylinders of the associated internal combustion engine to be supplied with fuel.
  • the delivery lines each have a valve 23, which is designed as a check valve or as a pressure relief valve in a known manner is to the fuel injection points, not shown.
  • the fuel injection quantity regulator 25 provided for the adjustment of the ring slide has a tensioning lever 26 which is designed to be pivotable about an axis 27 and has one arm and is coupled at its lever arm end to a regulating spring arrangement 28. This is in turn suspended at its end on a swivel arm 33 which can be adjusted with an adjusting lever 35 via a shaft 34 which is passed through the pump housing.
  • a start lever 39 can also be pivoted about the axis 27, which is designed with two arms and is coupled with one arm via a ball head 40 in an engaging manner in a transverse groove 41 running in a radial plane to the ring slide with the ring slide.
  • the other arm of the start lever has a leaf spring 49 which, as a start spring, is supported against the tension lever 26 in a spreading manner.
  • Actuator 42 of a speed sensor in the form of a centrifugal force arrangement 43 of a known type acts on precisely this lever arm of start lever 39. This is driven synchronously with the drive shaft 44 of the fuel injection pump.
  • the actuator 42 together with the start lever 39 and the ring slide 18 are moved against the force of the start spring 49 until the start lever comes into contact with the tensioning lever 26.
  • the axis 27 is mounted on an adjusting lever 46 which is pivotable about an axis 47 fixed to the housing and is held in contact with an adjustable stop 48 by a spring 51. This clamping ensures that the position of the adjusting lever 46 is secured both with respect to the stop 48 and along the axis 27.
  • the adjusting lever 46, the tensioning lever 26 and the starting lever 39 are shown enlarged with the axis 27.
  • the start lever 39 is supported against the tension lever 26 by a start spring 49.
  • the adjusting lever 46 has a punched-out slot 60, in which a finger or a punched-out tongue 61 of the starting lever 39 engages. By guiding the finger 61 in the slot 60, the start lever 39 is secured relative to the adjusting lever 46 against axial displacement in the direction of the axis 27.
  • the finger 61 is formed by an extension of the fold receiving the ball head 40 at the end of the start lever 39 (see FIG. 1) and the slot 60 is designed as an open slot extending from the end of the adjusting lever on the pump piston side.
  • the finger can also be made from a bolt pressed by the start lever or from a bolt attached to the start lever in some other way, e.g. welded part are formed.
  • the finger can also be arranged on the adjusting lever 46 and the slot 60 can be provided on the starting lever, just as an elongated hole can be provided instead of an open slot or an open recess.
  • the adjusting lever 46, the starting lever 39 and the tensioning lever 26 are also pivotally mounted about the axis 27.
  • the adjusting lever 46 has at its end near the axis a right-angled bend 62 running in the direction of the axis 27, in which two oblong holes or slots 63 and 64 running perpendicular to the axis 27 are punched out.
  • a finger or a punched-out tongue 65 of the start lever 39 engages in the slot 63 and a finger or a punched-out tongue 66 of the tensioning lever 26 engages in the slot 64. In this way, the start lever 39 and the clamping lever 26 are secured relative to the adjusting lever 46 against axial displacement.
  • the tongues 65 and 66 are formed in the present case as an extension of the arms 69 and 70 bent from the lever arm plane 67 and 68 by the starting lever 39 and tensioning lever 26, which arms have the receiving bores for the passage of the axis 27 and are thus to be regarded as a supporting leg .

Description

Die Erfindung bezieht sich auf eine Kraftstoffeinspritzpumpe für Brennkraftmaschinen, insbesondere Dieselmotoren, mit mehreren für den Betrieb dienenden, schwenkbar gelagerten Schwenkhebeln, insbesondere einem Einstellhebel, einem Starthebel und einem Spannhebel, von welchen Schwenkhebeln wenigstens zwei auf einer gemeinsamen Achse gelagert sind und wenigstens einer, insbesondere der Einstellhebel, gegen Axialverschiebung relativ zum Pumpenkörper, beispielsweise durch eine Federbelastung, gesichert ist, wobei wenigstens ein Schwenkhebel relativ zu dem relativ zum Pumpenkörper gegen Axialverschiebung gesicherten Schwenkhebel gegen Axialverschiebung gesichert ist. Eine solche Einspritzpumpe ist beispielsweise aus der DE-OS 36 44 584 bekanntgeworden. Bei solchen bekannten Einspritzpumpen erfolgt die Sicherung der Schwenkhebel gegen axiale Verschiebung durch Distanzscheiben. Der Einbau dieser Distanzscheiben erfordert einen gewissen Arbeitsaufwand bei der Montage und es ergibt sich bei den bekannten Anordnungen ein axiales Spiel der Schwenkhebel von etwa 2 mm. Wenn die Schwenkhebel mit zusätzlichem Aufwand eingemessen werden so verbleibt immer noch ein axiales Spiel von ungefähr 1 mm. Auch dieses verringerte Spiel ist noch zu groß, um Streuungen bei der Einspritzung zu vermeiden.The invention relates to a fuel injection pump for internal combustion engines, in particular diesel engines, with a plurality of pivotally mounted pivoting levers serving for operation, in particular an adjusting lever, a starting lever and a tensioning lever, at least two of which pivoting levers are mounted on a common axis and at least one, in particular the adjustment lever is secured against axial displacement relative to the pump body, for example by a spring load, at least one pivot lever being secured against axial displacement relative to the pivot lever secured against axial displacement relative to the pump body. Such an injection pump has become known, for example, from DE-OS 36 44 584. In such known injection pumps, the swivel levers are secured against axial displacement by means of spacers. The installation of these spacers requires a certain amount of work during assembly and there is an axial play of the pivot lever of about 2 mm in the known arrangements. If the swivel levers are measured with additional effort, there is still an axial play of approximately 1 mm. This reduced backlash is still too large to avoid scattering during the injection.

Die Erfindung zielt darauf ab, das axiale Spiel der Schwenkhebel zu verringern und besteht im wesentlichen darin, daß von den relativ zueinander gegen Axialverschiebung gesicherten Schwenkhebeln einer einen Schlitz bzw. ein Langloch oder eine Nut aufweist, welcher bzw. welche senkrecht zur Achse verläuft und in welchen bzw. in welche ein Finger wenigstens eines anderen Schwenkhebels eingreift. Da nunmehr die axiale Sicherung in größerem Abstand von der Achse erfolgt kann das axiale Spiel der Schwenkhebel weitgehend verringert werden. Es kann ein axiales Spiel von nur 0,1 mm bis maximal 0,3 mm erreicht werden und dadurch kann die Präzision des Einspritzvorganges in ausreichendem Maße erhöht werden. Abgesehen davon entfällt der Montageaufwand für die Distanzscheiben bzw. Distanzhülsen. Bei aus Blech geformten Schwenkhebeln kann gemäß einer bevorzugten Ausführungsform der Erfindung der Finger von einer aus dem Blech ausgestanzten und gegebenenfalls rechtwinkelig abgebogenen Zunge gebildet sein. Eine solche ausgestanzte Zunge kann beim heutigen Stand der Stanztechnik sehr präzise hergestellt werden und ein Schlitz oder Langloch kann ebenso präzise gestanzt werden. Es kann daher eine axiale Verschiebung der betreffenden Schwenkhebel relativ zueinander auf ein Mindestmaß begrenzt werden und damit eine sehr hohe Präzision der Einspritzung erreicht werden. Dies ist insbesondere bei einer Sicherung des Starthebels relativ zum Einstellhebel von größter Bedeutung.The invention aims to reduce the axial play of the pivot levers and consists essentially in that of the pivot levers secured relative to one another against axial displacement, one has a slot or an elongated hole or a groove which is perpendicular to the axis and in which or in which a finger engages at least one other pivot lever. Since the axial securing is now carried out at a greater distance from the axis the axial play of the swivel levers can be largely reduced. An axial play of only 0.1 mm to a maximum of 0.3 mm can be achieved, and the precision of the injection process can be increased to a sufficient extent. Apart from this, there is no need to assemble the spacers or spacers. In the case of swivel levers formed from sheet metal, according to a preferred embodiment of the invention the finger can be formed by a tongue punched out of the sheet metal and possibly bent at a right angle. Such a punched-out tongue can be manufactured very precisely at the current state of the punching technology and a slot or slot can also be punched precisely. An axial displacement of the relevant pivot levers relative to one another can therefore be minimized and a very high precision of the injection can thus be achieved. This is of great importance, in particular when the start lever is secured relative to the adjusting lever.

Gemäß der Erfindung kann der Einstellhebel die von Schlitz, Langloch oder Nut gebildete Führung oder Führungen aufweisen, in welche der Finger des Starthebels bzw. Schlepphebels und/oder Spannhebels eingreift. Es kann aber auch umgekehrt der Einstellhebel den Finger aufweisen, welcher in die von Schlitz, Langloch oder Nut gebildete Führung oder Führungen des Starthebels bzw. Schlepphebels und/oder Spannhebels eingreift. Es kann auch der Finger als Zusatzteil ausgebildet und mit dem Hebel verschweißt oder verlötet sein. Letzten Endes kann auch der Finger als Einpreßteil ausgebildet sein.According to the invention, the adjusting lever can have the guide or guides formed by a slot, slot or groove, in which the finger of the starting lever or finger lever and / or clamping lever engages. Conversely, the adjusting lever can also have the finger, which engages in the guide or guides of the starting lever or rocker arm and / or clamping lever formed by the slot, slot or groove. The finger can also be designed as an additional part and welded or soldered to the lever. In the end, the finger can also be designed as a press-in part.

In der Zeichnung zeigt Fig.1 eine Verteilerkraftstoffeinspritzpumpe gemäß dem Stand der Technik. Fig.2 zeigt eine Ausführungsform der Erfindung, bei welcher zwei Schwenkhebel relativ zueinander gegen axiale Verschiebung gesichert sind und Fig.3 zeigt eine Ausführungsform der Erfindung, bei welcher drei Schwenkhebel relativ zueinander gegen axiale Verschiebung gesichert sind.1 shows a distributor fuel injection pump according to the prior art. 2 shows an embodiment of the invention in which two pivot levers are secured relative to one another against axial displacement and FIG. 3 shows an embodiment of the invention in which three pivot levers are secured relative to one another against axial displacement.

Bei der in Fig.1 dargestellten, dem Stand der Technik angehörenden Verteilerkraftstoffeinspritzpumpe ist in einem Gehäuse 1 eine Buchse 2 angeordnet, in deren einen Pumpenzylinder bildenden Innenbohrung 3 ein Pumpenkolben 4 durch einen Nockenantrieb angetriebenen eine hin- und hergehende und zugleich rotierende Bewegung ausführt. Der Pumpenkolben schließt auf seiner einen Stirnseite einen Pumpenarbeitsraum 6 ein und ragt zum Teil aus der Innenbohrung 3 heraus in einen Pumpensaugraum 7, der im Gehäuse 1 eingeschlossen ist. Der Pumpenarbeitsraum 6 wird über in der Mantelfläche des Pumpenkolbens angeordneten Längsnuten 8 und eine radial durch die Buchse 2 hindurchtretende und im Gehäuse 1 verlaufende Saugbohrung 9, die vom Pumpensaugraum 7 ausgeht, mit Kraftstoff versorgt, solange der Pumpenkolben seinen Saughub bzw. seine untere Totpunktlage einnimmt. Der Pumpensaugraum wird über eine Förderpumpe 11 aus einem hier nicht gezeigten Kraftstoffbehälter mit Kraftstoff versorgt. Vom Pumpenarbeitsraum 6 führt im Pumpenkolben ein Längskanal 14 ab, der als Sackbohrung ausgebildet und als Entlastungskanal zu bezeichnen ist. Von diesem zweigt eine Querbohrung 15 ab, die zu ersten Austrittsöffnungen 16 am Umfang des Pumpenkolbens 4 führten, in einem Bereich, in dem dieser in den Saugraum 7 ragt, der zugleich als Entlastungsraum für im Pumpenarbeitsraum 6 auf Hochdruck gebrachten Kraftstoff dient. In diesem Bereich ist auf dem Pumpenkolben ein Mengenverstellorgan in Form eines Ringschiebers 18 angeordnet, der dicht mit der Mantelfläche seines Innenringes auf dem Pumpenkolben gleitet, verdreh- und verschiebbar ist und mit durch die Mantelfläche und einer oberen Stirnseite gebildeter ersten Steuerkante 19, die ersten Austrittsöffnungen 16 steuert. Vom Entlastungskanal 14, der vorzugsweise koaxial zur Pumpenkolbenachse verläuft, zweigt ferner eine Radialbohrung 20 ab, die zu einer Verteileröffnung 21 am Pumpenkolbenumfang führt. Im Arbeitsbereich dieser Verteileröffnung zweigen in einer radialen Ebene von der Innenbohrung 3 Förderleitungen 22 ab, die entsprechend der Zahl der mit Kraftstoff zu versorgenden Zylinder der zugehörigen Brennkraftmaschine am Umfang der Innenbohrung 3 verteilt angeordnet sind. Die Förderleitungen führen über je ein Ventil 23, das als Rückschlagventil oder als Druckentlastungsventil in bekannter Weise ausgestaltet ist, zu den nicht gezeigten Kraftstoffeinspritzstellen. Der für die Verstellung des Ringschiebers vorgesehene Kraftstoffeinspritzmengenregler 25 weist einen Spannhebel 26 auf, der um eine Achse 27 schwenkbar, einarmig ausgebildet ist und an seinem Hebelarmende mit einer Regelfederanordnung 28 gekoppelt ist. Diese ist wiederum an ihrem Ende an einem Schwenkarm 33 eingehängt, der über eine durch das Pumpengehäuse durchgeführte Welle 34 mit einem Verstellhebel 35 verstellbar ist. Um die Achse 27 ist ferner ein Starthebel 39 schwenkbar, der zweiarmig ausgeführt ist und mit einem Arm über einen Kugelkopf 40 in eine in einer Radialebene zum Ringschieber verlaufenden Quernut 41 eingreifend mit dem Ringschieber gekoppelt ist. Der andere Arm des Starthebels weist eine Blattfeder 49 auf, die sich als Startfeder gegen den Spannhebel 26 spreizend an diesem abstützt. Auf eben diesen Hebelarm des Starthebels 39 wirkt das Stellglied 42 eines Drehzahlgebers in Form einer Fliehkraftstellenanordnung 43 bekannter Bauart. Diese wird synchron zur Antriebswelle 44 der Kraftstoffeinspritzpumpe angetrieben. Mit zunehmender Drehzahl werden also das Stellglied 42 zusammen mit dem Starthebel 39 und dem Ringschieber 18 entgegen der Kraft der Startfeder 49 verschoben, bis der Starthebel am Spannhebel 26 zur Anlage kommt. Zur Einstellung ist die Achse 27 auf einem Einstellhebel 46 gelagert, der um eine gehäusefeste Achse 47 schwenkbar und durch eine Feder 51 in Anlage an einem einstellbaren Anschlag 48 gehalten wird. Durch diese Einspannung ist die Lage des Einstellhebels 46 sowohl in Bezug auf den Anschlag 48, als auch längs der Achse 27 gesichert.In the prior art distributor fuel injection pump shown in FIG. 1 is in a housing 1 a bushing 2 is arranged, in the inner bore 3 of which forms a pump cylinder, a pump piston 4 executes a reciprocating and at the same time rotating movement driven by a cam drive. The pump piston encloses a pump working chamber 6 on one end face and partially protrudes out of the inner bore 3 into a pump suction chamber 7, which is enclosed in the housing 1. The pump working chamber 6 is supplied with fuel via longitudinal grooves 8 arranged in the lateral surface of the pump piston and a suction bore 9 which extends radially through the bushing 2 and runs in the housing 1 and extends from the pump suction chamber 7, as long as the pump piston assumes its suction stroke or its bottom dead center position . The pump suction chamber is supplied with fuel via a feed pump 11 from a fuel tank, not shown here. A longitudinal channel 14, which is designed as a blind bore and is to be referred to as a relief channel, leads away from the pump work chamber 6 in the pump piston. From this branches off a transverse bore 15, which led to first outlet openings 16 on the circumference of the pump piston 4, in an area in which it protrudes into the suction chamber 7, which at the same time serves as a relief chamber for fuel brought to high pressure in the pump working chamber 6. In this area, a quantity adjusting element in the form of a ring slide 18 is arranged on the pump piston, which slides tightly with the outer surface of its inner ring on the pump piston, is rotatable and displaceable, and with the first control edge 19 formed by the outer surface and an upper end face, the first outlet openings 16 controls. A radial bore 20 branches off from the relief channel 14, which preferably runs coaxially with the pump piston axis, which leads to a distributor opening 21 on the circumference of the pump piston. In the working area of this distributor opening, feed lines 22 branch off in a radial plane from the inner bore 3 and are arranged distributed around the circumference of the inner bore 3 in accordance with the number of cylinders of the associated internal combustion engine to be supplied with fuel. The delivery lines each have a valve 23, which is designed as a check valve or as a pressure relief valve in a known manner is to the fuel injection points, not shown. The fuel injection quantity regulator 25 provided for the adjustment of the ring slide has a tensioning lever 26 which is designed to be pivotable about an axis 27 and has one arm and is coupled at its lever arm end to a regulating spring arrangement 28. This is in turn suspended at its end on a swivel arm 33 which can be adjusted with an adjusting lever 35 via a shaft 34 which is passed through the pump housing. A start lever 39 can also be pivoted about the axis 27, which is designed with two arms and is coupled with one arm via a ball head 40 in an engaging manner in a transverse groove 41 running in a radial plane to the ring slide with the ring slide. The other arm of the start lever has a leaf spring 49 which, as a start spring, is supported against the tension lever 26 in a spreading manner. Actuator 42 of a speed sensor in the form of a centrifugal force arrangement 43 of a known type acts on precisely this lever arm of start lever 39. This is driven synchronously with the drive shaft 44 of the fuel injection pump. With increasing speed, the actuator 42 together with the start lever 39 and the ring slide 18 are moved against the force of the start spring 49 until the start lever comes into contact with the tensioning lever 26. For setting, the axis 27 is mounted on an adjusting lever 46 which is pivotable about an axis 47 fixed to the housing and is held in contact with an adjustable stop 48 by a spring 51. This clamping ensures that the position of the adjusting lever 46 is secured both with respect to the stop 48 and along the axis 27.

Bei der erfindungsgemäßen Ausbildung nach Fig.2 sind der Einstellhebel 46, der Spannhebel 26 und der Starthebel 39 mit der Achse 27 vergrößert dargestellt. Der Starthebel 39 ist durch eine Startfeder 49 gegen den Spannhebel 26 abgestützt. Der Einstellhebel 46 weist einen ausgestanzten Schlitz 60 auf, in welchen ein Finger bzw. eine ausgestanzte Zunge 61 des Starthebels 39 eingreift. Durch Führung des Fingers 61 in dem Schlitz 60 wird der Starthebel 39 relativ zum Einstellhebel 46 gegen axiale Verschiebung in Richtung der Achse 27 gesichert.2, the adjusting lever 46, the tensioning lever 26 and the starting lever 39 are shown enlarged with the axis 27. The start lever 39 is supported against the tension lever 26 by a start spring 49. The adjusting lever 46 has a punched-out slot 60, in which a finger or a punched-out tongue 61 of the starting lever 39 engages. By guiding the finger 61 in the slot 60, the start lever 39 is secured relative to the adjusting lever 46 against axial displacement in the direction of the axis 27.

Der Finger 61 wird dabei durch eine Verlängerung der den Kugelkopf 40 aufnehmenden Falzung am Ende des Starthebels 39 gebildet (siehe Fig.1) und der Schlitz 60 ist als ein von der pumpenkolbenseitigen Stirnseite des Einstellhebels ausgehender offener Schlitz ausgebildet. Alternativ dazu kann der Finger auch aus einem durch den Starthebel gepreßten Bolzen oder durch ein am Starthebel in sonstiger Weise befestigtes, z.B. verschweißtes Teil gebildet werden. Es kann umgekehrt auch der Finger am Einstellhebel 46 angeordnet sein und der Schlitz 60 am Starthebel vorgesehen werden, wie auch statt eines offenen Schlitzes oder einer offenen Ausnehmung ein Langloch vorgesehen werden kann.The finger 61 is formed by an extension of the fold receiving the ball head 40 at the end of the start lever 39 (see FIG. 1) and the slot 60 is designed as an open slot extending from the end of the adjusting lever on the pump piston side. Alternatively, the finger can also be made from a bolt pressed by the start lever or from a bolt attached to the start lever in some other way, e.g. welded part are formed. Conversely, the finger can also be arranged on the adjusting lever 46 and the slot 60 can be provided on the starting lever, just as an elongated hole can be provided instead of an open slot or an open recess.

Bei der Ausführungsform der Erfindung nach Fig.3 sind der Einstellhebel 46, der Starthebel 39 und der Spannhebel 26 ebenfalls um die Achse 27 schwenkbar gelagert. Der Einstellhebel 46 weist an seinem achsnahen Ende eine rechtwinklige in Richtung der Achse 27 verlaufende Abbiegung 62 auf, in welcher zwei senkrecht zur Achse 27 verlaufende Langlöcher oder Schlitze 63 und 64 ausgestanzt sind. In den Schlitz 63 greift ein Finger bzw. eine ausgestanzte Zunge 65 des Starthebels 39 ein und in den Schlitz 64 greift ein Finger bzw. eine ausgestanzte Zunge 66 des Spannhebels 26 ein. Auf diese Weise sind der Starthebel 39 und der Spannhebel 26 relativ zum Einstellhebel 46 gegen axiale Verschiebung gesichert.In the embodiment of the invention according to FIG. 3, the adjusting lever 46, the starting lever 39 and the tensioning lever 26 are also pivotally mounted about the axis 27. The adjusting lever 46 has at its end near the axis a right-angled bend 62 running in the direction of the axis 27, in which two oblong holes or slots 63 and 64 running perpendicular to the axis 27 are punched out. A finger or a punched-out tongue 65 of the start lever 39 engages in the slot 63 and a finger or a punched-out tongue 66 of the tensioning lever 26 engages in the slot 64. In this way, the start lever 39 and the clamping lever 26 are secured relative to the adjusting lever 46 against axial displacement.

Die Zungen 65 und 66 werden in vorliegendem Fall als Verlängerung der aus der Hebelarmebene 67 bzw. 68 vom Starthebel 39 bzw. Spannhebel 26 gebogene Arme 69 bzw. 70 geformt, welche Arme die Aufnahmebohrungen zur Durchführung der Achse 27 aufweisen und somit als Tragschenkel anzusehen sind.The tongues 65 and 66 are formed in the present case as an extension of the arms 69 and 70 bent from the lever arm plane 67 and 68 by the starting lever 39 and tensioning lever 26, which arms have the receiving bores for the passage of the axis 27 and are thus to be regarded as a supporting leg .

Die oben ausgegebenen Alternativen zu Fig.1 können auch hier entsprechend angeordnet werden.The alternatives to FIG. 1 given above can also be arranged here accordingly.

Claims (6)

  1. Fuel injection pump for internal combustion engines, in particular diesel engines, with a plurality of pivotably mounted pivoting levers serving for operation, namely a setting lever (46), a starting lever (39) and a tension lever (26), of which pivoting levers at least two are mounted on a common shaft (27) and the setting lever (46) is secured against axial displacement relative to the pump body, for example by spring loading, the shaft (27) being mounted on the setting lever, and at least one pivoting lever (26, 39) being secured against axial displacement relative to the setting lever (46), characterized in that, of the pivoting levers (46), secured against axial displacement relative to one another, one has at least one slot (60, 63, 64) or long hole or groove which runs perpendicularly relative to the shaft and into which a finger (61, 65, 66) of at least one other pivoting lever (39, 26) engages.
  2. Fuel injection pump according to Claim 1, characterized in that, in the case of pivoting levers produced from sheet metal, the finger is formed by a tongue punched out of the metal sheet and, if appropriate, bent at a right angle.
  3. Fuel injection pump according to Claim 1 or 2, characterized in that the setting lever has the guide or guides which is or are formed by the slot, long hole or groove and into which the finger of the starting lever or drag lever and/or tension lever engages.
  4. Fuel injection pump according to Claim 1 or 2, characterized in that the setting lever has the finger which engages into the guide or guides of the starting lever or drag lever and/or tension lever which is or are formed by the slot, long hole or groove.
  5. Fuel injection pump according to one of Claims 1 to 4, characterized in that the finger is designed as an additional part and is welded, soldered or riveted to the lever.
  6. Fuel injection pump according to one of Claims 1 to 4, characterized in that the finger is designed as a press-in part.
EP93119662A 1993-01-02 1993-12-07 Fuel injection pump for an internal combustion engine Expired - Lifetime EP0609519B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4300015 1993-01-02
DE4300015A DE4300015A1 (en) 1993-01-02 1993-01-02 Fuel injection pump for internal combustion engines

Publications (2)

Publication Number Publication Date
EP0609519A1 EP0609519A1 (en) 1994-08-10
EP0609519B1 true EP0609519B1 (en) 1997-08-20

Family

ID=6477696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119662A Expired - Lifetime EP0609519B1 (en) 1993-01-02 1993-12-07 Fuel injection pump for an internal combustion engine

Country Status (3)

Country Link
EP (1) EP0609519B1 (en)
JP (1) JPH06235358A (en)
DE (2) DE4300015A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885337A (en) 1995-11-28 1999-03-23 Nohr; Ronald Sinclair Colorant stabilizers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1371386A (en) * 1963-07-26 1964-09-04 Centrifugal governor with revolutions adjustment mechanism
US3572303A (en) * 1968-08-22 1971-03-23 Bendix Corp Fuel injection pump
DE3405540A1 (en) * 1984-02-16 1985-08-22 Robert Bosch Gmbh, 7000 Stuttgart SPEED REGULATOR FOR FUEL INJECTION PUMPS
DE3424268A1 (en) * 1984-06-30 1986-01-09 Robert Bosch Gmbh, 7000 Stuttgart SPEED REGULATOR FOR FUEL INJECTION PUMPS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885337A (en) 1995-11-28 1999-03-23 Nohr; Ronald Sinclair Colorant stabilizers

Also Published As

Publication number Publication date
EP0609519A1 (en) 1994-08-10
DE4300015A1 (en) 1994-07-07
JPH06235358A (en) 1994-08-23
DE59307172D1 (en) 1997-09-25

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