EP0766782B1 - Fuel injection pump for internal combustion engines - Google Patents

Fuel injection pump for internal combustion engines Download PDF

Info

Publication number
EP0766782B1
EP0766782B1 EP95936428A EP95936428A EP0766782B1 EP 0766782 B1 EP0766782 B1 EP 0766782B1 EP 95936428 A EP95936428 A EP 95936428A EP 95936428 A EP95936428 A EP 95936428A EP 0766782 B1 EP0766782 B1 EP 0766782B1
Authority
EP
European Patent Office
Prior art keywords
lever
fuel injection
spring
injection pump
adjusting
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
EP95936428A
Other languages
German (de)
French (fr)
Other versions
EP0766782A1 (en
Inventor
Willi Weippert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0766782A1 publication Critical patent/EP0766782A1/en
Application granted granted Critical
Publication of EP0766782B1 publication Critical patent/EP0766782B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • 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
    • F02D1/04—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 by mechanical means dependent on engine speed, e.g. using centrifugal governors
    • F02D1/045—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 by mechanical means dependent on engine speed, e.g. using centrifugal governors characterised by arrangement of springs or weights
    • 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
    • F02D2001/0005—Details, component parts or accessories of centrifugal governors
    • F02D2001/002—Arrangement of governor springs
    • F02D2001/0025—Arrangement of governor springs having at least two springs, one of them being idling spring
    • 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
    • F02D2001/0005—Details, component parts or accessories of centrifugal governors
    • F02D2001/0045—Arrangement of means for influencing governor characteristics by operator

Definitions

  • the invention relates to a fuel injection pump for Internal combustion engines according to the preamble of claim 1.
  • Fuel injection pump has a lever as an adjustment lever T-shape, which is connected to the shaft at its base, which is used to adjust the idle spring.
  • the cross legs of the T-shaped adjustment lever are used for the system Adjustment limit stops.
  • As a clutch assembly for Adjustment of the adjustment lever according to the adjustment of the Adjusting lever for the control spring serves a bolt that in a backdrop of a one-armed lever slides, the end of which System comes on the lever for adjusting the control spring.
  • the basic setting is at the end of the one arm Lever requires an adjusting screw.
  • a variation of the Assignment of the actuating movement of the actuating lever for the control springs for the adjusting movement of the adjusting lever must be interpreted by the Backdrop guided. This requires a considerable amount Effort and otherwise is due to the need of one-armed lever or an intermediate lever according to another Embodiment of the document mentioned a relatively large Installation space required.
  • FIG. 1 shows a schematic arrangement of Regulating spring, idling spring and regulating levers with volume adjustment element a fuel injection pump
  • Figure 2 shows the embodiment the invention with coupling of an adjusting lever with an adjustment lever of the fuel injection pump over a cam track
  • Figure 3 is a view offset by 90 ° the arrangement shown in Figure 1.
  • Pump piston 1 Inside a fuel injection pump, as shown by the EP-A-0 451 151 is known, is in a housing bore arranged pump piston 1, which, but not shown here, delimits a pump work space in the housing bore moving and rotating is driven and its movement out of the pump workspace below Injection pressure to the previously introduced fuel of several injection lines determined by its rotational position promotes.
  • the termination of the funding stroke of the Pump piston under high pressure is done by opening one Relief channel 2, which starts from the pump work space in the Pump piston 1 running over a radial bore 3 on the circumference of the pump piston exits and into the pump piston there surrounding suction chamber opens, with the brought to low pressure Fuel is filled and from which the pump work space supplied with fuel during the suction stroke of the pump piston becomes.
  • the relief of the relief channel 2 via the Radial bore 3 occurs when the pump piston is running his, in the drawing to the right, stroke from the overlap of a seal that can be moved tightly on the pump piston 1
  • Quantity adjustment device 4 in the form of a ring slide exit.
  • the quantity adjustment element 4 is operated by means of a regulator lever 5 in its the fuel injection quantity per pump piston stroke determining position and is via a coupling head 6 coupled with this.
  • the control lever 5 is one Axis 7 swiveling against the force of one at the end the control lever 5 attached idle spring 8, the other end attached to an idle spring lever 9 is. This is via a shaft 10, which in no further shown out through the pump housing leads, connected to an adjusting lever 11, which in FIG. 2 is shown in more detail.
  • the control lever 5 also intervenes Centrifugal adjuster 14, through which the control lever with increasing speed and thus increasing force the force of the idle spring 8 pivoted about the axis 7 becomes.
  • the centrifugal adjuster provides a speed sensor represents, which generates a speed-dependent force, instead of this mechanical speed sensor also other types of Speed sensors can be used, such as hydraulic or electromechanically operated sensors.
  • the regulator lever may be overcome an additional starting spring 15, which is for a starting position the quantity adjustment 4 when the Fuel injection pump ensures and thus for an increased Fuel injection quantity at start, pivoted until the control lever 5 comes to rest on a clamping lever 16, the End position is determined by a stop 17 fixed to the housing.
  • This tensioning lever can also be pivoted about axis 7 and a control spring 19 is articulated at its end, which on the other hand is in turn attached to an actuating lever 20.
  • the actuating lever 20 is operated by an actuating shaft 21 the housing leads to the outside, operated, being on the outside
  • An adjusting lever 22 is attached to the end of the adjusting shaft which is shown in more detail in Figure 1.
  • the control spring 19 is in the example shown as a compression spring designed in cooperation with a matching spring, which are both housed in a spring capsule, this initially with less applied force the control spring unit stable as a fixed transmission element between lever 20 and rocker arm 16 is such that with the adjustment of the control lever 20 starting from the Full load position of the tensioning lever 16 different load positions can be adjusted. Only when the final speed is reached is the force on the preloaded control spring unit 19 acts so large that the biasing force of clamped spring is overcome and the clamping lever 16 move regardless of the position of the control lever 20 can.
  • the adjustable, fixed, the idle speed should now by increasing the spring tension of the idle spring 8 in be variable within a given framework.
  • the adjusting lever 11 has a T-shaped configuration, with a "T" crossbar 24 and a T-line 25, which in the Area of its base point connected to the end of the shaft 10 is.
  • This stop is the end of one in a pilot hole 29 guided pin 30 or bolt, which with its other, preferably spherical end 31 in contact a cam track 33.
  • This cam track is part of one Cam 34, which is formed on an adjustable part 35 is.
  • This part lies flat on the 90 ° to the swivel plane the adjusting lever and the axis of the pin 30 Front side of the adjusting lever 22 and is together with this via a releasable connection, in particular Screw connection 36 attached to the actuating shaft 21.
  • This connection is part 35 pivotable in the context of a given by the length of an elongated hole in part 35 Angular range.
  • the adjustment lever are for limitation its pivoting adjustable stops 40 and 41 for assigned the smallest and the largest load setting.
  • the cam 34 extends in the longitudinal direction of the Swivel path of the together with the adjusting lever 22 in the area between stop 40 and 41 moving part 35 such that the head 31 of the pin 30 in constant contact with the cam track 33 remains under the action of the return spring 26, over the adjusting lever and one arm of the T-crossbar 24 acts on the pin 30. So that is achieved that with a pivoting movement of the adjusting lever 22nd the adjusting lever 11 as part of the actuating movement of the moving cam track 33 following pin 30 is pivoted.
  • the guide bore 29 for the Pin 30 is advantageously through a longitudinal bore formed by a screw 43 which in a housing part the fuel injection pump is screwed in.
  • the end face of the screw 43 can be used as an additional Stop for the maximum adjustment of the setting lever, resulting from the possible path of the maximum around the path "S" from the screw 43 protruding pin 30 results.
  • this pin 30 represents the setting of the Adjusting lever determining stop, which is in the frame the conditions of the cam track 33 shifts. That attack thus sets the minimum idle setting spring preload.
  • the maximum setting is by the projection dimension "S" of the screw 43 is limited.
  • the adjusting lever 11 can also be used as a simple one-armed lever can be designed with accordingly suitable attachment of the return spring 26 that this Presses the lever arm onto the stop 27.
  • the one in FIG. 3 shown T-shaped three-armed lever is only used if in addition to the adjustable stop 27 an additional one Attack is considered necessary.

Landscapes

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

Description

Stand der TechnikState of the art

Die Erfindung geht von einer Kraftstoffeinspritzpumpe für Brennkraftmaschinen nach der Gattung des Patentanspruchs 1 aus. Eine solche durch die EP-A-0 624 720 bekannte Kraftstoffeinspritzpumpe weist als Einstellhebel einen Hebel in T-Form auf, der an seinem Fußpunkt mit der Welle verbunden ist, die zur Verstellung der Leerlauffeder dient. Die Quer-Schenkel des T-förmig gestalteten Einstellhebels dienen zur Anlage an Verstellbegrezungsanschlägen. Als eine Kupplungsanordnung zur Verstellung des Einstellhebels entsprechend der Verstellung des Verstellhebels für die Regelfeder dient dabei ein Bolzen, der in einer Kulisse eines einarmigen Hebels gleitet, dessen Ende zur Anlage am Stellhebel zur Verstellung der Regelfeder kommt. Dabei dient die Rückstellfeder, die an einem der Quer-Schenkel angreift, zur kraftschlüssigen Anlage dieses einarmigen Hebels am Stellhebel. Zur Grundeinstellung ist am Ende des einarmigen Hebels eine Einstellschraube erforderlich. Eine Variation der Zuordnung der Stellbewegung des Stellhebels für die Regelfedern zur Stellbewegung des Einstellhebels muß durch die Auslegung der Kulissenführung erfolgen. Dies erfordert einen erheblichen Aufwand und im übrigen ist durch die Notwendigkeit des einarmigen Hebels oder eines Zwischenhebels gemäß einem weiteren Ausführungsbeispiel des erwähnten Dokuments ein relativ großer Bauraum erforderlich. The invention relates to a fuel injection pump for Internal combustion engines according to the preamble of claim 1. One known from EP-A-0 624 720 Fuel injection pump has a lever as an adjustment lever T-shape, which is connected to the shaft at its base, which is used to adjust the idle spring. The cross legs of the T-shaped adjustment lever are used for the system Adjustment limit stops. As a clutch assembly for Adjustment of the adjustment lever according to the adjustment of the Adjusting lever for the control spring serves a bolt that in a backdrop of a one-armed lever slides, the end of which System comes on the lever for adjusting the control spring. Here serves the return spring on one of the cross legs attacks for the frictional engagement of this one-armed lever on the control lever. The basic setting is at the end of the one arm Lever requires an adjusting screw. A variation of the Assignment of the actuating movement of the actuating lever for the control springs for the adjusting movement of the adjusting lever must be interpreted by the Backdrop guided. This requires a considerable amount Effort and otherwise is due to the need of one-armed lever or an intermediate lever according to another Embodiment of the document mentioned a relatively large Installation space required.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Kraftstoffeinspritzpumpe mit den Merkmalen des Kennzeichens des Patentanspruchs 1 hat demgegenüber den Vorteil, daßThe fuel injection pump according to the invention with the features of the characterizing part of claim 1 in contrast the advantage that

damit eine günstige, ggf. auch bei einer vorhandenen Kraftstoffeinspritzpumpe bei eingeschränkten Platzverhältnissen nachrüstbare Anordnung zur Erzielung der Leerlaufeinstellung bereit gestellt wird. Durch die Weiterbildung der Erfindung gemäß Patentanspruch 2 und 3 läßt sich vorteilhaft der Einsatzpunkt des Eingriffes auf den Leerlauf im Laufe der Verstellung des Verstellhebels variieren und speziellen Gegebenheiten der zugeordneten Brennkraftmaschine anpassen. Weitere Anpassungsmöglichkeiten sind durch die Ausgestaltungen gemäß Patentanspruch 4 und Patentanspruch 5 gegeben, durch die insbesondere bei um 90° zueinander versetzten Schwenkebenen von Verstellhebel und Einstellhebel eine günstige und platzsparende Anordnung geschaffen wird.in order to a cheap, if necessary also with an existing fuel injection pump with limited space retrofittable arrangement to achieve the idle setting provided. By developing the invention according to claims 2 and 3 can be advantageous Starting point of the intervention on the idle in the course of Adjustment of the adjustment lever vary and special Adapt the conditions of the assigned internal combustion engine. Further configurations are possible through the configurations according to claim 4 and claim 5, through the staggered at 90 ° to each other Swiveling planes of the adjusting lever and adjusting lever are a favorable one and space-saving arrangement is created.

Zeichnungdrawing

Ein Ausführungsbeispiel des Gegenstands der Erfindung ist in der Zeichnung dargestellt, und wird im nachstehenden näher erläutert. Es zeigen Figur 1 eine schematische Anordnung von Regelfeder, Leerlauffeder und Regelhebeln mit Mengenverstellorgan einer Kraftstoffeinspritzpumpe, Figur 2 das Ausführungsbeispiel der Erfindung mit Kopplung eines Einstellhebels mit einem Verstellhebel der Kraftstoffeinspritzpumpe über eine Kurvenbahn und Figur 3 eine um 90° versetzte Ansicht der in Figur 1 gezeigten Anordnung.An embodiment of the subject of the invention is in shown in the drawing, and will be described in more detail below explained. FIG. 1 shows a schematic arrangement of Regulating spring, idling spring and regulating levers with volume adjustment element a fuel injection pump, Figure 2 shows the embodiment the invention with coupling of an adjusting lever with an adjustment lever of the fuel injection pump over a cam track and Figure 3 is a view offset by 90 ° the arrangement shown in Figure 1.

Im Innern einer Kraftstoffeinspritzpumpe, wie sie durch die EP-A-0 451 151 bekannt ist, ist in einer Gehäusebohrung ein pumpenkolben 1 angeordnet, der, hier aber nicht dargestellt, in der Gehäusebohrung einen Pumpenarbeitsraum begrenzt, hinund hergehend sowie rotierend angetrieben ist und bei seiner Hinbewegung aus dem Pumpenarbeitsraum unter Einspritzdruck den zuvor eingebrachten Kraftstoff zu einer von mehreren, durch seine Drehstellung bestimmten Einspritzleitung fördert. Die Beendigung des Förderhubs des Pumpenkolbens unter Hochdruck erfolgt durch Aufsteuern eines Entlastungskanals 2, der ausgehend vom Pumpenarbeitsraum im Pumpenkolben 1 verlaufend über eine Radialbohrung 3 am Pumpenkolbenumfang austritt und in den den Pumpenkolben dort umgebenden Saugraum mündet, der mit auf Niederdruck gebrachtem Kraftstoff gefüllt ist und aus dem der Pumpenarbeitsraum beim Saughub des Pumpenkolbens mit Kraftstoff versorgt wird. Die Entlastung des Entlastungskanals 2 über die Radialbohrung 3 erfolgt dann, wenn der Pumpenkolben im Laufe seines, in der Zeichnung nach rechts gehenden, Förderhubs aus der Überdeckung eines dicht auf dem Pumpenkolben 1 verschiebbaren Mengenverstellorgans 4 in Form eines Ringschiebers austritt.Inside a fuel injection pump, as shown by the EP-A-0 451 151 is known, is in a housing bore arranged pump piston 1, which, but not shown here, delimits a pump work space in the housing bore moving and rotating is driven and its movement out of the pump workspace below Injection pressure to the previously introduced fuel of several injection lines determined by its rotational position promotes. The termination of the funding stroke of the Pump piston under high pressure is done by opening one Relief channel 2, which starts from the pump work space in the Pump piston 1 running over a radial bore 3 on the circumference of the pump piston exits and into the pump piston there surrounding suction chamber opens, with the brought to low pressure Fuel is filled and from which the pump work space supplied with fuel during the suction stroke of the pump piston becomes. The relief of the relief channel 2 via the Radial bore 3 occurs when the pump piston is running his, in the drawing to the right, stroke from the overlap of a seal that can be moved tightly on the pump piston 1 Quantity adjustment device 4 in the form of a ring slide exit.

Das Mengenverstellorgan 4 wird mittels eines Reglerhebels 5 in seine die Kraftstoffeinspritzmenge pro Pumpenkolbenhub bestimmende Stellung gebracht und ist über einen Kupplungskopf 6 mit diesem gekoppelt. Der Reglerhebel 5 ist um eine Achse 7 schwenkbar und zwar gegen die Kraft einer am Ende des Reglerhebels 5 angehängten Leerlauffeder 8, deren anderes Ende an einem Leerlauffederstellhebel 9 befestigt ist. Dieser ist über eine Welle 10, die in nicht weiter dargestellter Weise durch das Pumpengehäuse nach außen führt, mit einem Einstellhebel 11 verbunden, der in Figur 2 näher dargestellt ist. Am Reglerhebel 5 greift ferner ein Fliehkraftversteller 14 an, durch den der Reglerhebel mit zunehmender Drehzahl und somit zunehmender Kraft entgegen der Kraft der Leerlauffeder 8 um die Achse 7 geschwenkt wird. Der Fliehkraftversteller stellt einen Drehzahlgeber dar, der eine drehzahlabhängige Kraft erzeugt, wobei statt diesem mechanischen Drehzahlgeber auch andere Arten von Drehzahlgebern Anwendung finden können, wie hydraulische oder elektromechanisch betriebene Geber. Durch den Fliehkraftversteller 14 wird der Reglerhebel ggf. unter Überwindung einer zusätzlichen Startfeder 15, die für eine Startstellung des Mengenverstellorgans 4 beim Stillstand der Kraftstoffeinspritzpumpe sorgt und somit für eine erhöhte Kraftstoffeinspritzmenge bei Start, geschwenkt, bis der Reglerhebel 5 zur Anlage an einen Spannhebel 16 kommt, dessen Endlage durch einen gehäusefesten Anschlag 17 bestimmt ist. Dieser Spannhebel ist ebenfalls um die Achse 7 schwenkbar und es ist an seinem Ende eine Regelfeder 19 angelenkt, die andererseits wiederum an einem Stellhebel 20 befestigt ist. Der Stellhebel 20 wird über eine Stellwelle 21, die durch das Gehäuse nach außen führt, betätigt, wobei am außenliegenden Ende der Stellwelle ein Verstellhebel 22 befestigt ist, der in Figur 1 näher dargestellt ist.The quantity adjustment element 4 is operated by means of a regulator lever 5 in its the fuel injection quantity per pump piston stroke determining position and is via a coupling head 6 coupled with this. The control lever 5 is one Axis 7 swiveling against the force of one at the end the control lever 5 attached idle spring 8, the other end attached to an idle spring lever 9 is. This is via a shaft 10, which in no further shown out through the pump housing leads, connected to an adjusting lever 11, which in FIG. 2 is shown in more detail. The control lever 5 also intervenes Centrifugal adjuster 14, through which the control lever with increasing speed and thus increasing force the force of the idle spring 8 pivoted about the axis 7 becomes. The centrifugal adjuster provides a speed sensor represents, which generates a speed-dependent force, instead of this mechanical speed sensor also other types of Speed sensors can be used, such as hydraulic or electromechanically operated sensors. By the centrifugal adjuster 14 the regulator lever may be overcome an additional starting spring 15, which is for a starting position the quantity adjustment 4 when the Fuel injection pump ensures and thus for an increased Fuel injection quantity at start, pivoted until the control lever 5 comes to rest on a clamping lever 16, the End position is determined by a stop 17 fixed to the housing. This tensioning lever can also be pivoted about axis 7 and a control spring 19 is articulated at its end, which on the other hand is in turn attached to an actuating lever 20. The actuating lever 20 is operated by an actuating shaft 21 the housing leads to the outside, operated, being on the outside An adjusting lever 22 is attached to the end of the adjusting shaft which is shown in more detail in Figure 1.

Bei Niedriglastbetrieb wird mit Hilfe des Fliehkraftverstellers 14 bei gegebener Einstellung der Leerlauffedervorspannung über den Einstellhebel 11 und den Leerlauffederstellhebel 9 die Leerlaufdrehzahl bestimmt. Wird die Vorspannung der Leerlauffeder 8 überwunden, schwenkt der Reglerhebel 5 aus und verschiebt den Ringschieber 4, das Mengenverstellorgan, nach unten und reduziert somit die Kraftstoffeinspritzmenge. Unter Lastbetrieb liegt der Reglerhebel 5 voll am Schlepphebel 16 an, wobei insbesondere bei Vollastbetrieb der Spannhebel 16 durch die Einstellung der Regelfeder 19 am Vollastanschlag 17 gehalten wird, bis die Endabregeldrehzahl erreicht wird, bei der die vorgespannte Regelfeder 19 komprimiert wird und der Spannhebel 16 zusammen mit dem Reglerhebel 5 im Uhrzeigersinn, bezogen auf die Darstellung in der Zeichnung, ausgelenkt wird. Damit wird wiederum die Kraftstoffeinspritzmenge reduziert.In low-load operation, using the centrifugal adjuster 14 for a given setting of the idle spring preload via the adjusting lever 11 and the idle spring adjusting lever 9 determines the idle speed. Will the bias overcome the idle spring 8, the control lever pivots 5 and shifts the ring slide 4, the quantity adjustment element, down and thus reduces the fuel injection quantity. The control lever is under load 5 fully on the rocker arm 16, in particular at Full load operation of the tensioning lever 16 by setting the Control spring 19 is held at full load stop 17 until the Final control speed is reached at which the preloaded Control spring 19 is compressed and the clamping lever 16 together with the control lever 5 clockwise, based on the Representation in the drawing, is deflected. So that will again reduced the fuel injection quantity.

Die Regelfeder 19 ist im ausgeführten Beispiel als Druckfeder in Zusammenwirkung mit einer Angleichfeder ausgebildet, die beide in einer Federkapsel untergebracht sind, wobei diese zunächst bei geringer aufgebrachter Kraft auf die Regelfedereinheit stabil als festes Übertragungsglied zwischen Stellhebel 20 und Schlepphebel 16 liegt derart, daß mit dem Verstellen des Stellhebels 20 ausgehend von der Vollastlage des Spannhebels 16 verschiedene Laststellungen eingestellt werden können. Erst bei Erreichen der Enddrehzahl ist die Kraft, die auf die vorgespannte Regelfedereinheit 19 wirkt, so groß, daß die Vorspannkraft der eingespannten Feder überwunden wird und sich der Spannhebel 16 unabhängig von der Stellung des Stellhebels 20 bewegen kann.The control spring 19 is in the example shown as a compression spring designed in cooperation with a matching spring, which are both housed in a spring capsule, this initially with less applied force the control spring unit stable as a fixed transmission element between lever 20 and rocker arm 16 is such that with the adjustment of the control lever 20 starting from the Full load position of the tensioning lever 16 different load positions can be adjusted. Only when the final speed is reached is the force on the preloaded control spring unit 19 acts so large that the biasing force of clamped spring is overcome and the clamping lever 16 move regardless of the position of the control lever 20 can.

Während bei bisherigen Pumpen zunächst die Leerlaufdrehzahl mit Hilfe der Leerlauffeder 8 und des Einstellhebels 11 fest eingestellt war, indem dieser durch einen Anschlag 23, der einstellbar ist, fixiert wurde, soll nun die Leerlaufdrehzahl durch Erhöhung der Federspannung der Leerlauffeder 8 in einem vorgegebenen Rahmen variabel sein. Gemäß der Figur 2 weist der Einstellhebel 11 eine T-förmige Konfiguration auf, mit einem "T"-Querbalkens 24 und einem T-Strich 25, der im Bereich seines Fußpunktes mit dem Ende der Welle 10 verbunden ist.While with previous pumps, initially the idling speed with the help of the idle spring 8 and the adjusting lever 11 was set by this by a stop 23, the adjustable, fixed, the idle speed should now by increasing the spring tension of the idle spring 8 in be variable within a given framework. According to FIG. 2 the adjusting lever 11 has a T-shaped configuration, with a "T" crossbar 24 and a T-line 25, which in the Area of its base point connected to the end of the shaft 10 is.

Durch eine außenliegende zusätzliche Rückstellfeder 26 wird der Einstellhebel 11 so beaufschlagt, daß er bestrebt ist, mit dem einen Arm seines T-Balkens 24 an einen Anschlag 27 zur Anlage zu kommen.By an external return spring 26 the setting lever 11 is acted on so that it strives to with one arm of its T-bar 24 to a stop 27 to come to the plant.

Dieser Anschlag ist das Ende eines in einer Führungsbohrung 29 geführten Stiftes 30 oder Bolzens, der mit seinem anderen, vorzugsweise kugelkopfförmigen Ende 31 in Anlage an einer Kurvenbahn 33 ist. Diese Kurvenbahn ist Teil eines Nockens 34, der an einem verstellbaren Teil 35 ausgebildet ist. Dieser Teil liegt flächig an der um 90° zur Schwenkebene des Einstellhebels und der Achse des Stiftes 30 versetzten Stirnseite des Verstellhebels 22 an und ist zusammen mit diesem über eine lösbare Verbindung, insbesondere Schraubverbindung 36 an der Stellwelle 21 befestigt. Um diese Verbindung ist das Teil 35 schwenkbar im Rahmen eines durch die Länge eines Langloches im Teil 35 gegebenen Winkelbereiches. Durch das Langloch ist eine Schraube 39 in den Verstellhebel 22 eingeschraubt, durch welche das Teil 35 in einer bestimmten Drehstellung zum Verstellhebel 22 fixiert werden kann. Dem Verstellhebel sind zur Begrenzung seiner Schwenkbewegung verstellbare Anschläge 40 und 41 für die kleinste und die größte Lasteinstellung zugeordnet.This stop is the end of one in a pilot hole 29 guided pin 30 or bolt, which with its other, preferably spherical end 31 in contact a cam track 33. This cam track is part of one Cam 34, which is formed on an adjustable part 35 is. This part lies flat on the 90 ° to the swivel plane the adjusting lever and the axis of the pin 30 Front side of the adjusting lever 22 and is together with this via a releasable connection, in particular Screw connection 36 attached to the actuating shaft 21. Around this connection is part 35 pivotable in the context of a given by the length of an elongated hole in part 35 Angular range. Through the slot is a screw 39 in screwed the adjusting lever 22 through which the part 35 in a certain rotational position to the adjusting lever 22 can be fixed. The adjustment lever are for limitation its pivoting adjustable stops 40 and 41 for assigned the smallest and the largest load setting.

Der Nocken 34 erstreckt sich dabei in Längsrichtung der Schwenkbahn des zusammen mit dem Verstellhebel 22 im Bereich zwischen Anschlag 40 und 41 bewegten Teiles 35 derart, daß der Kopf 31 des Stiftes 30 in ständiger Anlage an der Kurvenbahn 33 bleibt unter Einwirkung der Rückstellfeder 26, die über den Einstellhebel und dem einen Arm des T-Querbalkens 24 auf den Stift 30 wirkt. Damit wird erreicht, daß bei einer Schwenkbewegung des Verstellhebels 22 der Einstellhebel 11 im Rahmen der Stellbewegung des der bewegten Kurvenbahn 33 folgenden Stiftes 30 geschwenkt wird.The cam 34 extends in the longitudinal direction of the Swivel path of the together with the adjusting lever 22 in the area between stop 40 and 41 moving part 35 such that the head 31 of the pin 30 in constant contact with the cam track 33 remains under the action of the return spring 26, over the adjusting lever and one arm of the T-crossbar 24 acts on the pin 30. So that is achieved that with a pivoting movement of the adjusting lever 22nd the adjusting lever 11 as part of the actuating movement of the moving cam track 33 following pin 30 is pivoted.

Je nach Ausgestaltung der Kurvenbahnen 33 erreicht man hiermit eine Kopplung der Einstellung der Leerlauffeder an die Last, die durch den Verstellhebel 22 vorgegeben wird. Dabei kann die Zuordnung der Kurvenbahn 33 zur Lage des Verstellhebels 22 verändert werden. Die Führungsbohrung 29 für den Stift 30 wird dabei in vorteilhafter Weise durch eine Längsbohrung durch eine Schraube 43 gebildet, die in ein Gehäuseteil der Kraftstoffeinspritzpumpe eingeschraubt ist. Dabei kann die Stirnseite der Schraube 43 als zusätzlicher Anschlag für die Maximalverstellung des Einstellhebels dienen, die sich aus dem möglichen Weg des maximal um den Weg "S" aus der Schraube 43 vorstehenden Stiftes 30 ergibt.Depending on the configuration of the curved tracks 33, this is achieved a coupling of the setting of the idle spring to the Load that is specified by the adjusting lever 22. Here can assign the cam track 33 to the position of the adjusting lever 22 can be changed. The guide bore 29 for the Pin 30 is advantageously through a longitudinal bore formed by a screw 43 which in a housing part the fuel injection pump is screwed in. The end face of the screw 43 can be used as an additional Stop for the maximum adjustment of the setting lever, resulting from the possible path of the maximum around the path "S" from the screw 43 protruding pin 30 results.

Dadurch, daß mit Hilfe der Rückstellfeder 26 der Einstellhebel 11 in ständigem Kontakt mit dem Anschlag 27 bzw. dem Stift 30 ist, stellt dieser Stift 30 den die Einstellung des Einstellhebels bestimmenden Anschlag dar, der sich im Rahmen der Gegebenheiten der Kurvenbahn 33 verschiebt. Dieser Anschlag stellt somit die Mindesteinstellung für die Leerlauf federvorspannung ein. Die Maximaleinstellung wird durch das Vorstehmaß "S" der Schraube 43 begrenzt.Characterized in that with the help of the return spring 26 of the adjusting lever 11 in constant contact with the stop 27 or the Is pin 30, this pin 30 represents the setting of the Adjusting lever determining stop, which is in the frame the conditions of the cam track 33 shifts. That attack thus sets the minimum idle setting spring preload. The maximum setting is by the projection dimension "S" of the screw 43 is limited.

In diesem Falle kann der Einstellhebel 11 auch als einfacher, einarmiger Hebel ausgestaltet werden, mit entsprechend geeigneter Anbringung der Rückstellfeder 26, die diesen Hebelarm auf den Anschlag 27 preßt. Der in der Figur 3 gezeigte T-förmige dreiarmige Hebel hat nur dann Verwendung, wenn außer dem verstellbaren Anschlag 27 noch ein zusätzlicher Anschlag als notwendig erachtet wird.In this case, the adjusting lever 11 can also be used as a simple one-armed lever can be designed with accordingly suitable attachment of the return spring 26 that this Presses the lever arm onto the stop 27. The one in FIG. 3 shown T-shaped three-armed lever is only used if in addition to the adjustable stop 27 an additional one Attack is considered necessary.

Claims (5)

  1. Fuel injection pump for internal combustion engines, with a fuel injection quantity adjusting member (4) which is actuated by a speed lever (5) which can be adjusted counter to the force of a governing spring (19) as a function of a force formed as a function of rotational speed, the governing spring (19) being arranged between the speed lever (5, 16) and a regulating lever (20) which can be adjusted via a fixedly mounted regulating shaft, to the end of which a floating lever (22) is fastened, and with an idling spring (8) which, additionally to the governing spring (19), is coupled to the speed lever (5, 16) and is clamped between the latter and an idling-spring regulating lever (9) which is fastened to a shaft (10) mounted fixedly relative to the housing and which can be adjusted by means of an adjusting lever (11) which is connected to the shaft (10) and the pivoting movement of which is limited by a stop (23, 24, 33, 36) and can be set as a function of operating parameters of the internal combustion engine by means of an actuating device, the actuating device consisting of a return spring (26) engaging on the adjusting lever (11) and of a coupling arrangement, by means of which the adjusting lever (11) is coupled non-positively to the floating lever (22), in such a way that the adjusting lever (11) follows the adjustment of the floating lever (22), characterized in that the coupling arrangement consists of a displaceably mounted pin (30) which is clamped, under the effect of the return spring (26), between the adjusting lever (11) and a cam track (33) moved by the floating lever (22).
  2. Fuel injection pump according to Claim 1, characterized in that the cam track (33) is designed on a part (35) mounted rotatably and fixably on the floating lever (22).
  3. Fuel injection pump according to Claim 2, characterized in that the part (35), together with the floating lever, is fastened pivotably to the end of the regulating shaft (21) and can be additionally fixed to the floating lever (22) in a specific relationship to the latter via a long-hole/screw connection (38, 39).
  4. Fuel injection pump according to Claim 3, characterized in that the cam track (33) rises perpendicularly to the pivoting plane of the floating lever, and the pin and the pivoting plane of the adjusting lever (11) are arranged perpendicularly to the pivoting plane of the floating lever (22).
  5. Fuel injection pump according to Claims 1 to 4, characterized in that the pin (30) and the setscrew (43) serve as adjustable stops (27) of the adjusting lever (11).
EP95936428A 1994-12-03 1995-11-10 Fuel injection pump for internal combustion engines Expired - Lifetime EP0766782B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4443114 1994-12-03
DE4443114A DE4443114A1 (en) 1994-12-03 1994-12-03 Fuel injection pump for internal combustion engines
PCT/DE1995/001554 WO1996018027A1 (en) 1994-12-03 1995-11-10 Fuel injection pump for internal combustion engines

Publications (2)

Publication Number Publication Date
EP0766782A1 EP0766782A1 (en) 1997-04-09
EP0766782B1 true EP0766782B1 (en) 1998-09-23

Family

ID=6534866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95936428A Expired - Lifetime EP0766782B1 (en) 1994-12-03 1995-11-10 Fuel injection pump for internal combustion engines

Country Status (8)

Country Link
US (1) US5722369A (en)
EP (1) EP0766782B1 (en)
JP (1) JPH09508953A (en)
KR (1) KR960706606A (en)
CN (1) CN1073202C (en)
BR (1) BR9506711A (en)
DE (2) DE4443114A1 (en)
WO (1) WO1996018027A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6773240B2 (en) 2002-01-28 2004-08-10 Visteon Global Technologies, Inc. Single piston dual chamber fuel pump
FR2863663B1 (en) * 2003-12-12 2006-06-16 Simcoo REGULATOR DEVICE FOR SMALL HEAT ENGINES

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2090430B (en) * 1980-12-31 1984-06-13 Lucas Industries Ltd Governor system
DE3147701A1 (en) * 1981-12-02 1983-06-16 Robert Bosch Gmbh, 7000 Stuttgart CONTROL DEVICE FOR A FUEL FLOW ADJUSTMENT MEMBER OF A FUEL INJECTION PUMP
DE3500341A1 (en) * 1984-07-13 1986-01-16 Robert Bosch Gmbh, 7000 Stuttgart SPEED REGULATOR FOR FUEL INJECTION PUMPS
DE3605824A1 (en) * 1986-02-22 1987-08-27 Bosch Gmbh Robert FUEL INJECTION PUMP FOR SUPPLYING THE COMBUSTION SPACE OF VEHICLE ENGINES PROVIDED FOR VEHICLE DRIVES
DE3743060A1 (en) * 1987-12-18 1989-06-29 Bosch Gmbh Robert SPEED REGULATOR FOR FUEL INJECTION PUMPS
DE3818574A1 (en) * 1988-06-01 1989-12-07 Bosch Gmbh Robert FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES, ESPECIALLY DIESEL INTERNAL COMBUSTION ENGINES
DE3844452A1 (en) * 1988-12-31 1990-07-05 Bosch Gmbh Robert DISTRIBUTION FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
EP0624720B1 (en) * 1993-05-14 1996-03-06 Robert Bosch Gmbh Fuel injection pump for internal combustion engines

Also Published As

Publication number Publication date
DE59503713D1 (en) 1998-10-29
KR960706606A (en) 1996-12-09
BR9506711A (en) 1997-09-09
WO1996018027A1 (en) 1996-06-13
CN1134738A (en) 1996-10-30
US5722369A (en) 1998-03-03
CN1073202C (en) 2001-10-17
DE4443114A1 (en) 1996-06-05
JPH09508953A (en) 1997-09-09
EP0766782A1 (en) 1997-04-09

Similar Documents

Publication Publication Date Title
DE69210194T2 (en) Self-limiting slave pistons
DE3144277A1 (en) METHOD FOR DELAYING THE AXIAL MOVEMENT OF A PUMP PISTON OF A FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES, AND FUEL INJECTION PUMP FOR CARRYING OUT THE METHOD
EP0766782B1 (en) Fuel injection pump for internal combustion engines
DE3121108A1 (en) FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE3418437A1 (en) FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE2349655A1 (en) SPEED REGULATOR FOR FUEL INJECTION PUMPS
DE3203583A1 (en) FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES WITH INJECTION TIME ADJUSTMENT
DE4129837A1 (en) SPEED REGULATOR FOR FUEL INJECTION PUMPS OF INTERNAL COMBUSTION ENGINES
DE3644148A1 (en) FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE2648991A1 (en) FUEL INJECTION PUMP
DE3138640C2 (en)
DE3743060A1 (en) SPEED REGULATOR FOR FUEL INJECTION PUMPS
EP0624720B1 (en) Fuel injection pump for internal combustion engines
EP0209681B1 (en) Speed governor for a fuel injection pump
EP0627552A1 (en) fuel injection pump
EP0208898B1 (en) Speed governor for fuel injection pumps
DE1261355B (en) Control device for an internal combustion engine injection pump
DE3140125A1 (en) Filling control for a supercharged internal combustion engine with separately arranged injection pumps
DE864782C (en) Regulator for fuel injection engines
EP0328892A1 (en) Control device for diesel engine injection pumps having means for correcting the injection mass in accordance with the charging pressure
DE3721301A1 (en) Device for regulating a fuel feed adjuster of a fuel injection pump
DE3632538A1 (en) FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE2811912A1 (en) FUEL INJECTION SYSTEM
DE3632539C2 (en) Fuel injection pump for motor vehicle internal combustion engines
DE4332847A1 (en) Fuel injection pump for IC engine - has actuator of return spring and coupling arrangement, to couple setting and adjusting levers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19961213

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19970915

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59503713

Country of ref document: DE

Date of ref document: 19981029

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981124

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20011022

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20011120

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011227

Year of fee payment: 7

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030603

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030731

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051110