EP0355666A2 - Fuel injection device with torque control for internal-combustion engines - Google Patents

Fuel injection device with torque control for internal-combustion engines Download PDF

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Publication number
EP0355666A2
EP0355666A2 EP89115040A EP89115040A EP0355666A2 EP 0355666 A2 EP0355666 A2 EP 0355666A2 EP 89115040 A EP89115040 A EP 89115040A EP 89115040 A EP89115040 A EP 89115040A EP 0355666 A2 EP0355666 A2 EP 0355666A2
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EP
European Patent Office
Prior art keywords
adjustment
adjusting
amount
internal combustion
adjusting screw
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
EP89115040A
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German (de)
French (fr)
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EP0355666A3 (en
EP0355666B1 (en
Inventor
Werner Lemme
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.)
Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Publication of EP0355666A2 publication Critical patent/EP0355666A2/en
Publication of EP0355666A3 publication Critical patent/EP0355666A3/en
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Publication of EP0355666B1 publication Critical patent/EP0355666B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • 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
    • 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

Definitions

  • the invention relates to an injection device for internal combustion engines according to the preamble of patent claim 1.
  • An injection device for internal combustion engines in which an adjustment of the control rod in the sense of an increase in the amount of fuel delivered per pump stroke is effected when the speed of the internal combustion engine decreases, is known from DE-AS 20 35 946.
  • the alignment device described in the aforementioned prior publication is of complex construction overall and, in addition to a plurality of linkages with pivot and pivot points, has a plurality of control springs. It is particularly disadvantageous that an adjustment characteristic set by the interaction of linkage, articulation points and spring stiffness of the springs cannot be changed.
  • the invention has for its object to provide an injection device for an internal combustion engine, which can be used for different applications of internal combustion engines with associated different demands on the injection device.
  • the start of adjustment can be changed as a function of the speed and the adjustment amount can be set.
  • the injection device according to the invention can be used universally and the amount of fuel delivered can be individually changed or set in accordance with the requirements for the internal combustion engine with regard to different uses. It is also possible to use the injection device according to the invention for internal combustion engines of different series and to adjust the injection device according to the respective requirements of a series.
  • the start of the adjustment can be changed while the internal combustion engine is running and the adjustment amount can also be set while the internal combustion engine is running.
  • This is particularly advantageous, in particular, for large-scale production of an internal combustion engine, since the correspondingly produced internal combustion engines can all be manufactured and adjusted in the same way and only have to be set to a specific matching characteristic when the attachment, for example, becomes known.
  • This also results in the possibility of being able to easily adjust the control characteristics of an internal combustion engine, without the internal combustion engine having to be stopped or new parts even having to be used.
  • the controller has an adjustable full-load stop.
  • the adjustable full-load stop can be a useful addition to the adjustment quantity and the start of adjustment other important parameters of the injector can be influenced.
  • full load stop, start of adjustment and adjustment amount can be influenced independently of one another.
  • the individual parameters can thus be varied independently of one another.
  • full load stop, start of adjustment and adjustment amount can be influenced by means of adjusting screws. This creates a particularly simple injection device, in which the adjustment process of the adjustment device can take place without special tools.
  • the adjusting screws for the beginning of adjustment and the adjusting amount are arranged coaxially to one another, the adjusting screw for changing the beginning of adjustment being designed as a hollow screw and comprising the adjusting screw for adjusting the adjusting amount. This means that both the start of adjustment and the amount of adjustment can be set using a single service point.
  • the adjusting screw for adjusting the full load stop is additionally designed as a hollow screw, which at the same time coaxially encompasses the adjusting screw for changing the start of adjustment.
  • the adjusting screw for setting the full load stop can only comprise the adjusting screw for changing the start of adjustment alone, or the adjusting screw for changing the beginning of adjustment can also - as explained above - also include the adjusting screw for adjusting the adjustment amount. Especially when training according to the latter Variant creates an extremely compact setting device with which all the adjustments described above can be made.
  • all adjusting screws can be secured against unintentional twisting. This is done on the one hand so that the control characteristic of the injection device does not change unintentionally during operation of the internal combustion engine, on the other hand it can prevent unintentional manipulation of the injection device by unauthorized service personnel on the injection device if the adjustment screws are at least partially secured, for example, with a Kind of sealing wax is done.
  • the adaptation device 1 Only the part of the adaptation device 1 according to the invention is of the injection device of an internal combustion engine shown. An opening is machined into the housing 2 of the injection device or another part of the internal combustion engine in the case of individual injection devices and a central control rod 6, which has a cylindrical section 3 and then a threaded section 4 with a smaller diameter. In the interior of the injection device or the internal combustion engine, the control rod 6 or a transmission element connected to the control rod 6 is arranged in extension to the central axis 5 of the alignment device 1.
  • the adjusting device 1 essentially consists of three coaxially arranged adjusting screws 7, 8 and 9 and a matching spring 10.
  • the outer adjusting screw 7 for setting the full load stop is designed as a hollow screw and screwed into the threaded section 4 of the opening.
  • the adjusting screw 7 for the full load stop has, in cooperation with the cylindrical section 3, an annular groove 11 into which a round cord ring 12 is inserted, which seals the adjusting screw 7 for the full load stop relative to the housing 2.
  • the adjusting screw 7 has a slot 13 on the end face of the annular groove 11 (see also FIG. 2), into which a screwdriver provided with a correspondingly wide blade can be used to turn the adjusting screw 7.
  • the inner circumference of the adjusting screw 7 is in the area of the outer area interacting with the threaded section 4 with a cylindrical inner surface 16 provided, while the inner portion of the adjusting screw 7 lying axially parallel to the cylindrical portion 3 is provided with an internal thread 17.
  • a short hollow screw is screwed into the internal thread 17 and represents the adjusting screw 8 for changing the beginning of the adjustment.
  • the adjusting screw 8 for the start of adjustment also has an outer slot 18 (FIG. 2) at its end facing the outside of the adjustment device 1, by means of which it can be rotated.
  • the inside of the adjusting screw 8 is in turn provided with a thread into which the adjusting screw 9 is screwed for adjusting the adjustment amount.
  • the adjustment spring 10 is supported on the end face 19 of the adjusting screw 8 facing the control rod 6, which is in turn supported with its opposite end on a sliding piece 20.
  • the sliding piece 20 is axially displaceable on the cylindrical inner surface 16, the maximum displacement being determined by the snap ring 15 and the start of the internal thread 17, which forms a shoulder to the cylindrical inner surface 16.
  • the sliding piece 20 has an extension 21 which extends axially in the direction of the control rod 6.
  • the aforementioned maximum displacement path of the sliding piece 20 is - as previously mentioned - only formed by the internal thread 17 if the adjusting screw 9 for the adjustment amount is unscrewed accordingly far. Otherwise, that part of the extension 21 which faces the adjusting screw 9 is supported on the adjusting screw 9 after the sliding piece 20 has been correspondingly displaced.
  • the adjusting screw 9 also has a slot 22 (see also FIG. 2).
  • the outer adjusting screw 7 for the full load stop is by means of a clamping claw 23, which does not have a closer screw connection 24 shown is connected to the housing 2, secured against unintentional rotation.
  • a cap 25 is inserted in front of the outer slot 18 and the slot 22 into the adjusting screw 7 which is designed as a hollow screw. This cap is secured against unauthorized removal by appropriate devices (sealing wax).
  • FIG. 3 shows a diagram in which the injection quantity is plotted against the speed of the internal combustion engine.
  • the controller characteristic is defined by the corner points A, B, C, D, E and F.
  • the range of the controller characteristic from C to D can essentially be influenced by the adjustment device 1 according to the invention.
  • the slope of section C-D (marked I) represents the adjustment quantity, while the start of adjustment can be changed by moving point D according to III.
  • the full load stop is adjusted by moving the corner points D and E according to II.
  • the forces acting on the control rod 6 are from a centrifugal governor, not shown, which acts on the control rod 6 in a suitable form in the same direction as the adjusting device 1, with a control spring which acts on the control rod on its opposite side, not shown , in balance.
  • a centrifugal governor which acts on the control rod 6 in a suitable form in the same direction as the adjusting device 1, with a control spring which acts on the control rod on its opposite side, not shown , in balance.
  • the force exerted by the governor on the control rod 6 becomes smaller, so that the adjustment spring 10 is compressed by the control spring, not shown, via the control rod 6 and the sliding piece 20, whereby the delivery rate is increased.
  • the preload of the adjustment spring 10 is changed, whereby the balance of forces of the springs acting on the control rod 6 (centrifugal governor, control spring and adjustment spring) is changed, whereby point D is shifted according to III on the speed axis.
  • the adjusting spring 10 is compressed widely as the speed decreases further by the correspondingly smaller force 50 exerted by the centrifugal governor on the control rod 6 until the sliding piece 20 abuts the adjusting screw 9. Point C is thus reached with the corresponding increase in the injection quantity corresponding to I.
  • the adjustment of the injection quantity can be adjusted by turning the adjusting screw 9.
  • the point of use of the adjustment device 1 is adjusted overall, so that the device only begins to function with correspondingly larger or smaller injection quantities corresponding to the control rod position 6.

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  • 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)

Abstract

In known injection devices which have a torque control (1) and, as the speed of the internal-combustion engine falls, the torque control (1) effects an adjustment of the control rod (6) to produce an increase in the quantity of fuel delivered per pump stroke (+ torque control), the control characteristic is predetermined and unalterable by virtue of the correspondingly selected kinematics and the springs employed. The fuel injection device according to the invention provides a torque control (1) in which the amount and beginning of torque control can be adjusted even when the internal-combustion engine is running. <IMAGE>

Description

Die Erfindung betrifft eine Einspritzvorrichtung für Brennkraftmaschinen gemäß dem Oberbegriff des Patentan­spruchs 1.The invention relates to an injection device for internal combustion engines according to the preamble of patent claim 1.

Eine Einspritzvorrichtung für Brennkraftmaschinen, bei der bei sinkender Drehzahl der Brennkraftmaschine eine Anglei­chung der Regelstange im Sinne einer Vermehrung der je Pumpenhub geförderten Brennstoffmenge bewirkt wird, ist aus der DE-AS 20 35 946 bekannt. Die in der genannten Vorveröffentlichung beschriebene Angleichvorrichtung ist insgesamt kompliziert aufgebaut und weist neben einer Vielzahl von Gestängen mit Dreh- und Anlenkpunkten mehrere Reglerfedern auf. Besonders nachteilig ist, daß eine durch das Zusammenwirken von Gestänge, Anlenkpunkten und Feder­steifigkeiten der Federn eingestellte Angleichcharakte­ristik nicht änderbar ist.An injection device for internal combustion engines, in which an adjustment of the control rod in the sense of an increase in the amount of fuel delivered per pump stroke is effected when the speed of the internal combustion engine decreases, is known from DE-AS 20 35 946. The alignment device described in the aforementioned prior publication is of complex construction overall and, in addition to a plurality of linkages with pivot and pivot points, has a plurality of control springs. It is particularly disadvantageous that an adjustment characteristic set by the interaction of linkage, articulation points and spring stiffness of the springs cannot be changed.

Der Erfindung liegt die Aufgabe zugrunde, eine Einspritz­vorrichtung für Brennkraftmaschine bereitzustellen, die für unterschiedliche Einsatzfälle von Brennkraftmaschinen mit damit verbundenen unterschiedlichen Anforderungen an die Einspritzvorrichtung verwendet werden kann.The invention has for its object to provide an injection device for an internal combustion engine, which can be used for different applications of internal combustion engines with associated different demands on the injection device.

Diese Aufgabe wird dadurch gelöst, daß der Angleichbeginn drehzahlabhängig änderbar ist und die Angleichmenge ein­stellbar ist. Dadurch ist die erfindungsgemäße Einspritz­vorrichtung universell verwendbar und die geförderte Brennstoffmenge kann entsprechend den Anforderungen an die Brennkraftmaschine bezüglich unterschiedlicher Verwen­dungszwecke individuell geändert bzw. eingestellt werden. Auch ist es möglich, die erfindungsgemäße Einspritzvor­richtung für Brennkraftmaschinen unterschiedlicher Bau­reihen zu verwenden und die Einspritzvorrichtung entspre­chend den jeweiligen Anforderungen einer Baureihe einzu­stellen.This object is achieved in that the start of adjustment can be changed as a function of the speed and the adjustment amount can be set. As a result, the injection device according to the invention can be used universally and the amount of fuel delivered can be individually changed or set in accordance with the requirements for the internal combustion engine with regard to different uses. It is also possible to use the injection device according to the invention for internal combustion engines of different series and to adjust the injection device according to the respective requirements of a series.

Gemäß vorteilhafter Weiterbildungen der Erfindung ist der Angleichbeginn bei laufender Brennkraftmaschine änderbar und auch die Angleichmenge bei laufender Brennkraftma­schine einstellbar. Dies ist insbesondere für eine Groß­serienfertigung einer Brennkraftmaschine besonders vor­teilhaft, da die entsprechend produzierten Brennkraftma­schinen alle gleich gefertigt und eingestellt werden kön­nen und erst bei Bekanntwerden beispielsweise des Anbauge­rätes auf eine bestimmte Angleichcharakteristik einge­stellt werden müssen. Auch ergibt sich dadurch die Mög­lichkeit, bei unterschiedlichen Anforderungen an die Regelcharakteristik einer Brennkraftmaschine diese leicht einstellen zu können, ohne daß die Brennkraftmaschine stillgesetzt werden muß oder gar neue Teile eingesetzt werden müssen.According to advantageous developments of the invention, the start of the adjustment can be changed while the internal combustion engine is running and the adjustment amount can also be set while the internal combustion engine is running. This is particularly advantageous, in particular, for large-scale production of an internal combustion engine, since the correspondingly produced internal combustion engines can all be manufactured and adjusted in the same way and only have to be set to a specific matching characteristic when the attachment, for example, becomes known. This also results in the possibility of being able to easily adjust the control characteristics of an internal combustion engine, without the internal combustion engine having to be stopped or new parts even having to be used.

Gemäß weiterer vorteilhafter Weiterbildung der Erfindung weist der Regler einen einstellbaren Vollastanschlag auf. Mit dem einstellbaren Vollastanschlag kann in sinnvoller Ergänzung zu der Angleichmenge und dem Angleichbeginn ein weiterer wichtiger Parameter der Einspritzvorrichtung beeinflußt werden.According to a further advantageous development of the invention, the controller has an adjustable full-load stop. The adjustable full-load stop can be a useful addition to the adjustment quantity and the start of adjustment other important parameters of the injector can be influenced.

In Weiterbildung der Erfindung sind Vollastanschlag, An­gleichbeginn und Angleichmenge unabhängig voneinander beeinflußbar. Somit können die einzelnen Parameter gezielt unabhängig voneinander variiert werden.In a further development of the invention, full load stop, start of adjustment and adjustment amount can be influenced independently of one another. The individual parameters can thus be varied independently of one another.

In Weiterbildung der Erfindung sind Vollastanschlag, An­gleichbeginn und Angleichmenge über Einstellschrauben beeinflußbar. Damit ist eine besonders einfache Einspritz­vorrichtung geschaffen, bei der der Einstellvorgang der Angleichvorrichtung ohne Spezialwerkzeuge erfolgen kann.In a further development of the invention, full load stop, start of adjustment and adjustment amount can be influenced by means of adjusting screws. This creates a particularly simple injection device, in which the adjustment process of the adjustment device can take place without special tools.

In Weiterbildung der Erfindung sind die Einstellschrauben für Angleichbeginn und Angleichmenge koaxial zueinander angeordnet, wobei die Einstellschraube zur Änderung des Angleichbeginns als Hohlschraube ausgebildet ist und die Einstellschraube zur Einstellung der Angleichmenge umfaßt. Damit kann mittels eines einzigen Servicepunktes sowohl Angleichbeginn als auch Angleichmenge eingestellt werden.In a further development of the invention, the adjusting screws for the beginning of adjustment and the adjusting amount are arranged coaxially to one another, the adjusting screw for changing the beginning of adjustment being designed as a hollow screw and comprising the adjusting screw for adjusting the adjusting amount. This means that both the start of adjustment and the amount of adjustment can be set using a single service point.

In vorteilhafter Weiterbildung der Erfindung ist zusätz­lich noch die Einstellschraube zur Einstellung des Vol­lastanschlages als Hohlschraube ausgebildet, die gleich­zeitig die Einstellschraube zur Änderung des Angleichbe­ginns koaxial umfaßt. Dabei kann die Einstellschraube zur Einstellung des Vollastanschlags nur die Einstellschraube zur Änderung des Angleichbeginns alleine umfassen oder aber die Einstellschraube zur Änderung des Angleichsbe­ginns kann - wie zuvor ausgeführt - auch noch die Ein­stellschraube zur Einstellung der Angleichmenge umfassen. Besonders bei Ausbildung gemäß der zuletzt genannten Variante wird eine äußerst kompakte Einstellvorrichtung geschaffen, mit der sämtliche zuvor beschriebene Anglei­chungen vorgenommen werden können.In an advantageous development of the invention, the adjusting screw for adjusting the full load stop is additionally designed as a hollow screw, which at the same time coaxially encompasses the adjusting screw for changing the start of adjustment. The adjusting screw for setting the full load stop can only comprise the adjusting screw for changing the start of adjustment alone, or the adjusting screw for changing the beginning of adjustment can also - as explained above - also include the adjusting screw for adjusting the adjustment amount. Especially when training according to the latter Variant creates an extremely compact setting device with which all the adjustments described above can be made.

In Weiterbildung der Erfindung sind sämtliche Einstell­schrauben gegen unbeabsichtigtes Verdrehen sicherbar. Dies erfolgt zum einen dazu, daß während des Betriebs der Brennkraftmaschine sich die Regelcharakteristik der Ein­spritzvorrichtung nicht ungewollt verändert, zum andern kann dadurch ungewollten Manipulationen an der Einspritz­vorrichtung durch nicht autorisiertes Servicepersonal an der Einspritzvorrichtung vorgebeugt werden, wenn die Sicherung der Einstellschrauben zumindest teilweise bei­spielsweise mit einer Art Siegellack erfolgt.In a development of the invention, all adjusting screws can be secured against unintentional twisting. This is done on the one hand so that the control characteristic of the injection device does not change unintentionally during operation of the internal combustion engine, on the other hand it can prevent unintentional manipulation of the injection device by unauthorized service personnel on the injection device if the adjustment screws are at least partially secured, for example, with a Kind of sealing wax is done.

Im folgenden wird die Erfindung anhand eines in den Figu­ren dargestellten Ausführungsbeispiels der Erfindung näher beschrieben.The invention is described in more detail below with reference to an embodiment of the invention shown in the figures.

Es zeigen:

  • Fig. 1: einen Querschnitt durch die erfindungsgemäße Angleichvorrichtung,
  • Fig. 2: eine Draufsicht auf die erfindungsgemäße Angleichvorrichtung und
  • Fig. 3: ein Einspritzdiagramm, in dem die Verstell­möglichkeiten der Angleichvorrichtungen eingetragen sind.
Show it:
  • 1 shows a cross section through the alignment device according to the invention,
  • 2: a top view of the alignment device according to the invention and
  • 3: an injection diagram in which the adjustment options of the adjustment devices are entered.

Von der Einspritzvorrichtung einer Brennkraftmaschine ist nur der erfindungsgemäße Teil der Angleichvorrichtung 1 dargestellt. In das Gehäuse 2 der Einspritzvorrichtung oder eines anderen Teils der Brennkraftmaschine bei Ein­zeleinspritzvorrichtungen und einer zentralen Regelstange 6 ist eine Öffnung eingearbeitet, die einen zylinderför­migen Abschnitt 3 und daran anschließend einen Gewindeab­schnitt 4 mit kleinerem Durchmesser aufweist. Im Innern der Einspritzvorrichtung oder der Brennkraftmaschine ist in Verlängerung zu der Mittelachse 5 der Angleichvorrich­tung 1 die Regelstange 6 oder ein mit der Regelstange 6 in Verbindung stehendes Übertragungsglied angeordnet.Only the part of the adaptation device 1 according to the invention is of the injection device of an internal combustion engine shown. An opening is machined into the housing 2 of the injection device or another part of the internal combustion engine in the case of individual injection devices and a central control rod 6, which has a cylindrical section 3 and then a threaded section 4 with a smaller diameter. In the interior of the injection device or the internal combustion engine, the control rod 6 or a transmission element connected to the control rod 6 is arranged in extension to the central axis 5 of the alignment device 1.

Die Anleichvorrichtung 1 besteht im wesentlichen aus drei koaxial zueiander angeordneten Einstellschrauben 7, 8 und 9 sowie einer Angleichfeder 10. Die äußere Einstell­schraube 7 zur Einstellung des Vollastanschlages ist als Hohlschraube ausgebildet und in den Gewindeabschnitt 4 der Öffnung eingeschraubt. Die Einstellschraube 7 für den Vollastanschlag weist zusammenwirkend mit dem zylinderför­migen Abschnitt 3 eine Ringnut 11 auf, in die ein Rund­schnurring 12 eingelegt ist, der die Einstellschraube 7 für den Vollastanschlag gegenüber dem Gehäuse 2 abdichtet. Weiterhin weist die Einstellschraube 7 auf der Seite der Ringnut 11 liegenden Stirnseite einen Schlitz 13 (siehe auch Fig. 2) auf, in den ein mit einer entsprechend brei­ten Klinge versehener Schraubendreher zum Verdrehen der Einstellschraube 7 eingesetzt werden kann. Auf dem der Regelstange 6 zugewandten Ende der Einstellschraube 7 ist im geringen Abstand von der Stirnseite eine Innenringnut 14 eingearbeitet, in die ein Sprengring 15 eingesetzt ist.The adjusting device 1 essentially consists of three coaxially arranged adjusting screws 7, 8 and 9 and a matching spring 10. The outer adjusting screw 7 for setting the full load stop is designed as a hollow screw and screwed into the threaded section 4 of the opening. The adjusting screw 7 for the full load stop has, in cooperation with the cylindrical section 3, an annular groove 11 into which a round cord ring 12 is inserted, which seals the adjusting screw 7 for the full load stop relative to the housing 2. Furthermore, the adjusting screw 7 has a slot 13 on the end face of the annular groove 11 (see also FIG. 2), into which a screwdriver provided with a correspondingly wide blade can be used to turn the adjusting screw 7. On the end of the adjusting screw 7 facing the control rod 6, an inner ring groove 14 is machined at a short distance from the end face, into which a snap ring 15 is inserted.

Weiterhin ist der Innenumfang der Einstellschraube 7 im Bereich des mit dem Gewindeabschnitt 4 zusammenwirkenden Außenbereichs mit einer zylinderförmigen Innenoberfläche 16 versehen, während der zu dem zylinderförmigen Abschnitt 3 achsparallel liegende Innnenabschnitt der Einstell­schraube 7 mit einem Innengewinde 17 versehen ist.Furthermore, the inner circumference of the adjusting screw 7 is in the area of the outer area interacting with the threaded section 4 with a cylindrical inner surface 16 provided, while the inner portion of the adjusting screw 7 lying axially parallel to the cylindrical portion 3 is provided with an internal thread 17.

In das Innengewinde 17 ist eine kurze Hohlschraube einge­dreht, die die Einstellschraube 8 zum Ändern des Angleich­beginns darstellt. Die Einstellschraube 8 für den An­gleichbeginn weist an ihrem zur Außenseite der Angleich­vorrichtung 1 weisenden Ende ebenfalls einen Außenschlitz 18 (Fig. 2) auf, mittels den sie verdreht werden kann. Innen ist die Einstellschraube 8 wiederum mit einem Gewin­de versehen, in das die Einstellschraube 9 zum Einstellen der Angleichmenge eingeschraubt ist. Auf der der Regel­stange 6 zugewandten Stirnseite 19 der Einstellschraube 8 stützt sich die Angleichfeder 10 ab, die sich mit ihrem gegenüberliegenden Ende wiederum auf einem Schiebestück 20 abstützt. Das Schiebestück 20 ist auf der zylinderförmigen Innenoberfläche 16 axial verschiebbar, wobei der maximale Verschiebeweg durch den Sprengring 15 und dem Beginn des Innengewindes 17, das einen Absatz zu der zylinderförmigen Innenoberfläche 16 bildet, festgelegt. Das Schiebestück 20 weist einen Fortsatz 21 auf, der sich axial in Richtung der Regelstange 6 erstreckt. Der zuvor genannte maximale Verchiebeweg des Schiebestücks 20 wird - wie zuvor ge­sagt - von dem Innengewinde 17 aber nur dann gebildet, wenn die Einstellschraube 9 für die Angleichmenge entspre­chend weit herausgedreht ist. Ansonsten stützt sich der der Einstellschraube 9 zugewandte Teil des Fortsatzes 21 nach entsprechenden Verschieben des Schiebestücks 20 an der Einstellschraube 9 ab. Die Einstellschraube 9 weist übrigens ebenfalls einen Schlitz 22 (siehe auch Fig. 2) auf. Die äußere Einstellschraube 7 für den Vollastanschlag ist mittels eine Spannpratze 23, die über eine nicht näher dargestellte Schraubverbindung 24 mit dem Gehäuse 2 ver­bunden ist, gegen unbeabsichtiges Verdrehen gesichert. Zum Schutz gegen unbeabsichtigtes und unberechtigtes Ver­drehen der Einstellschrauben 8 und 9 für Angleichbeginn und Angleichmenge ist vor dem Außenschlitz 18 und dem Schlitz 22 in die als Hohlschraube ausgebildete Einstell­schraube 7 eine Kappe 25 eingesetzt. Diese Kappe ist durch entsprechende Vorichtungen (Siegellack) gegen unberechtig­tes Entnehmen gesichert.A short hollow screw is screwed into the internal thread 17 and represents the adjusting screw 8 for changing the beginning of the adjustment. The adjusting screw 8 for the start of adjustment also has an outer slot 18 (FIG. 2) at its end facing the outside of the adjustment device 1, by means of which it can be rotated. The inside of the adjusting screw 8 is in turn provided with a thread into which the adjusting screw 9 is screwed for adjusting the adjustment amount. The adjustment spring 10 is supported on the end face 19 of the adjusting screw 8 facing the control rod 6, which is in turn supported with its opposite end on a sliding piece 20. The sliding piece 20 is axially displaceable on the cylindrical inner surface 16, the maximum displacement being determined by the snap ring 15 and the start of the internal thread 17, which forms a shoulder to the cylindrical inner surface 16. The sliding piece 20 has an extension 21 which extends axially in the direction of the control rod 6. The aforementioned maximum displacement path of the sliding piece 20 is - as previously mentioned - only formed by the internal thread 17 if the adjusting screw 9 for the adjustment amount is unscrewed accordingly far. Otherwise, that part of the extension 21 which faces the adjusting screw 9 is supported on the adjusting screw 9 after the sliding piece 20 has been correspondingly displaced. Incidentally, the adjusting screw 9 also has a slot 22 (see also FIG. 2). The outer adjusting screw 7 for the full load stop is by means of a clamping claw 23, which does not have a closer screw connection 24 shown is connected to the housing 2, secured against unintentional rotation. To protect against unintentional and unauthorized turning of the adjusting screws 8 and 9 for the start of adjustment and the amount to be adjusted, a cap 25 is inserted in front of the outer slot 18 and the slot 22 into the adjusting screw 7 which is designed as a hollow screw. This cap is secured against unauthorized removal by appropriate devices (sealing wax).

Die Funktion der erfidungsgemäßen Angleichvorrichtung wird nun anhand Fig. 3 erläutert. Fig. 3 stellt ein Diagramm dar, in dem die Einspritzmenge über der Drehzahl der Brennkraftmaschine aufgetragen ist. Die Reglerkennlinie ist durch die Eckpunkte A, B, C, D, E und F festgelegt. Dabei kann im wesentlichen der Bereich der Reglerkennlinie von C bis D durch die erfindungsgemäße Angleichvorrichtung 1 beeinflußt werden. Die Steigung des Abschnittes C-D (mit I gekennzeichnet) stellt die angleichmenge dar, während der Angleichbeginn durch Verschieben des Punktes D ent­sprechend III änderbar ist. Der Vollastanschlag wird durch entsprechendes Verschieben der Eckpunkte D und E gemäß II verstellt.The function of the matching device according to the invention will now be explained with reference to FIG. 3. 3 shows a diagram in which the injection quantity is plotted against the speed of the internal combustion engine. The controller characteristic is defined by the corner points A, B, C, D, E and F. The range of the controller characteristic from C to D can essentially be influenced by the adjustment device 1 according to the invention. The slope of section C-D (marked I) represents the adjustment quantity, while the start of adjustment can be changed by moving point D according to III. The full load stop is adjusted by moving the corner points D and E according to II.

Ausgehend vom Vollastpunkt E sind beispielsweise die auf die Regelstange 6 einwirkenden Kräfte von einem nicht dargestellten Fliehkraftregler, der in geeigneter Form in gleicher Wirkrichtung wie die Angleichvorrichtung 1 auf die Regelstange 6 einwirkt, mit einer Reglerfeder, die die Regelstange auf ihrer nicht dargestellten gegenüberliegen­den Seite beaufschlagt, im Gleichgewicht. Bei abnehmender Drehzahl wird die von dem Fliehkraftregler ausgeübte Kraft auf die Regelstange 6 kleiner, so daß die Angleichfeder 10 von der nicht dargestellten Regelfeder über die Regel­stange 6 und das Schiebestück 20 zusammengedrückt wird, wodurch die Fördermenge vergrößert wird. Dabei wird durch Verdrehen der Einstellschraube 8 die Vorspannung der An­gleichfeder 10 verändert, wodurch das Kräftegleichgewicht der an der Regelstange 6 angreifenden Federn (Fliehkraft­regler, Regelfeder und Angleichfeder) verändert wird, womit aber der Punkt D entsprechend III auf der Drehzahl­achse verschoben wird. Die Angleichfeder 10 wird bei wei­ter abnehmender Drehzahl durch die entsprechend kleiner werdende von dem Fliehkraftregler auf die Regelstange 6 ausgeübte Kraft 50 weit zusammengedrückt, bis das Schiebe­stück 20 an der Einstellschraube 9 anliegt. Damit ist der Punkt C mit der entsprechenden Vergrößerung der Einspritz­menge entsprechend I erreicht. Durch Verdrehen der Ein­stellschraube 9 kann die Angleichung der Einspritzmenge eingestellt werden. Durch Verdrehen der Einstellschraube 7 wird der Einsatzpunkt der Angleichvorrichtung 1 insgesamt verstellt, so daß die Einrichtung erst bei entsprechend größeren oder kleineren Einspritzmengen entsprechend der Regelstangenstellung 6 ihre Funktion aufnimmt.Starting from the full load point E, for example, the forces acting on the control rod 6 are from a centrifugal governor, not shown, which acts on the control rod 6 in a suitable form in the same direction as the adjusting device 1, with a control spring which acts on the control rod on its opposite side, not shown , in balance. As the speed decreases, the force exerted by the governor on the control rod 6 becomes smaller, so that the adjustment spring 10 is compressed by the control spring, not shown, via the control rod 6 and the sliding piece 20, whereby the delivery rate is increased. By turning the adjusting screw 8, the preload of the adjustment spring 10 is changed, whereby the balance of forces of the springs acting on the control rod 6 (centrifugal governor, control spring and adjustment spring) is changed, whereby point D is shifted according to III on the speed axis. The adjusting spring 10 is compressed widely as the speed decreases further by the correspondingly smaller force 50 exerted by the centrifugal governor on the control rod 6 until the sliding piece 20 abuts the adjusting screw 9. Point C is thus reached with the corresponding increase in the injection quantity corresponding to I. The adjustment of the injection quantity can be adjusted by turning the adjusting screw 9. By turning the adjusting screw 7, the point of use of the adjustment device 1 is adjusted overall, so that the device only begins to function with correspondingly larger or smaller injection quantities corresponding to the control rod position 6.

Claims (9)

1. Einspritzvorrichtung für Brennkraftmaschinen, die zumindest einen Regler aufweist, der bei sinkender Dreh­zahl der Brennkraftmaschine eine Angleichung des Regel­organs (6) im Sinne einer Vermehrung der je Pumpenhub geförderten Brennstoffmenge bewirkt (+ Angleichung), dadurch gekennzeichnet, daß der Angleichbeginn drehzahlab­hängig änderbar ist und die Angleichmenge einstellbar ist.1.Injection device for internal combustion engines, which has at least one controller, which causes an adjustment of the control element (6) in the sense of an increase in the amount of fuel delivered per pump stroke (+ adjustment) when the speed of the internal combustion engine decreases, characterized in that the start of adjustment can be changed depending on the speed and the adjustment amount is adjustable. 2. Einspritzvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Angleichbeginn bei laufen­der Brennkraftmaschine änderbar ist.2. Injector according to claim 1, characterized in that the beginning of the adjustment can be changed while the internal combustion engine is running. 3. Einspritzvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Angleichmenge bei laufen­der Brennkraftmaschine einstellbar ist.3. Injection device according to claim 1 or 2, characterized in that the adjustment amount is adjustable while the internal combustion engine is running. 4. Einspritzvorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß der Regler einen einstellbaren Vollastanschlag aufweist.4. Injector according to one of claims 1 to 3,
characterized in that the controller has an adjustable full load stop. 5. Einspritzvorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß Vollastanschlag, Angleichbe­ginn und Angleichmenge unabhängig voneinander beeinflußbar sind.5. Injector according to one of claims 1 to 4,
characterized in that full load stop, start of adjustment and adjustment amount can be influenced independently of one another. 6. Einspritzvorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß Vollastanschlag, Angleichbe­ginn und Angleichmenge über Einstellschrauben (7, 8, 9) beeinflußbar sind.6. Injector according to one of claims 1 to 5,
characterized in that full load stop, start of adjustment and amount of adjustment can be influenced via adjusting screws (7, 8, 9). 7. Einspritzvorrichtung nach Anspruch 6,
dadurch gekennzeichnet, daß die Einstellschrauben (7, 8) für Angleichbeginn und Angleichmenge koaxial zueinander angeordnet sind, wobei die Einstellschrauben (8) zur Ände­rung des Angleichbeginns als Hohlschraube ausgebildet ist und die Einstellschraube (9) zur Einstellung der Angleich­menge umfaßt.7. Injector according to claim 6,
characterized in that the adjusting screws (7, 8) for the start of adjustment and the amount of adjustment are arranged coaxially with one another, the adjusting screws (8) for changing the beginning of adjustment being designed as a hollow screw and comprising the adjusting screw (9) for adjusting the adjustment amount. 8. Einspritzvorrichtung nach Anspruch 6 oder 7,
dadurch gekennzeichnet, daß die Einstellschraube (9) zur Einstellung des Vollastanschlages als Hohlschraube ausge­bildet ist, die die Einstellschraube (8) zur Änderung des Angleichbeginns koaxial umfaßt.8. Injector according to claim 6 or 7,
characterized in that the adjusting screw (9) for adjusting the full load stop is designed as a hollow screw which coaxially encompasses the adjusting screw (8) for changing the start of adjustment. 9. Einspritzvorrichtung nach einem der Ansprüche 6 bis 8,
dadurch gekennzeichnet, daß die Einstellschrauben (7, 8, 9) gegen Verdrehen sicherbar sind.9. Injector according to one of claims 6 to 8,
characterized in that the adjusting screws (7, 8, 9) can be secured against rotation.
EP89115040A 1988-08-16 1989-08-16 Fuel injection device with torque control for internal-combustion engines Expired - Lifetime EP0355666B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3827734A DE3827734A1 (en) 1988-08-16 1988-08-16 INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES WITH ADJUSTMENT OF THE INJECTION AMOUNT
DE3827734 1988-08-16

Publications (3)

Publication Number Publication Date
EP0355666A2 true EP0355666A2 (en) 1990-02-28
EP0355666A3 EP0355666A3 (en) 1990-09-05
EP0355666B1 EP0355666B1 (en) 1994-04-13

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ID=6360931

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Application Number Title Priority Date Filing Date
EP89115040A Expired - Lifetime EP0355666B1 (en) 1988-08-16 1989-08-16 Fuel injection device with torque control for internal-combustion engines

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EP (1) EP0355666B1 (en)
DE (2) DE3827734A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005034113B4 (en) * 2005-07-21 2013-04-25 Deutz Ag Method for aligning a control device for an injection device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011223B (en) * 1954-05-14 1957-06-27 Bosch Gmbh Robert Centrifugal governor for internal combustion engines
DE2035946A1 (en) * 1969-07-23 1971-02-04 Friedmann & Maier AG, Hallein (Oster reich) Low weight regulator
US4067303A (en) * 1974-12-19 1978-01-10 Diesel Kiki Co., Ltd. Fuel injection pump governor
GB2119962A (en) * 1982-05-01 1983-11-23 Lucas Ind Plc Governor mechanism for a fuel pumping apparatus
GB2141808A (en) * 1983-06-16 1985-01-03 Bosch Gmbh Robert Correction spring capsule for an injection system of an internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1445842A (en) * 1972-12-29 1976-08-11 Cav Ltd Governors for fuel pumps
DE2308260C2 (en) * 1973-02-20 1983-11-24 Robert Bosch Gmbh, 7000 Stuttgart Centrifugal governor for internal combustion engines
DE2311044A1 (en) * 1973-03-06 1974-09-12 Bosch Gmbh Robert Centrifugal governor for fuel injection engines
DE2900198A1 (en) * 1979-01-04 1980-07-17 Bosch Gmbh Robert CENTRIFUGAL SPEED REGULATOR FOR INJECTION INTERNAL COMBUSTION ENGINES, IN PARTICULAR IDLE SPEED REGULATOR FOR VEHICLE DIESEL ENGINES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011223B (en) * 1954-05-14 1957-06-27 Bosch Gmbh Robert Centrifugal governor for internal combustion engines
DE2035946A1 (en) * 1969-07-23 1971-02-04 Friedmann & Maier AG, Hallein (Oster reich) Low weight regulator
US4067303A (en) * 1974-12-19 1978-01-10 Diesel Kiki Co., Ltd. Fuel injection pump governor
GB2119962A (en) * 1982-05-01 1983-11-23 Lucas Ind Plc Governor mechanism for a fuel pumping apparatus
GB2141808A (en) * 1983-06-16 1985-01-03 Bosch Gmbh Robert Correction spring capsule for an injection system of an internal combustion engine

Also Published As

Publication number Publication date
DE58907442D1 (en) 1994-05-19
EP0355666A3 (en) 1990-09-05
EP0355666B1 (en) 1994-04-13
DE3827734A1 (en) 1990-02-22

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