EP0687813A1 - Method and device fro mounting an injection pump element - Google Patents

Method and device fro mounting an injection pump element Download PDF

Info

Publication number
EP0687813A1
EP0687813A1 EP95107768A EP95107768A EP0687813A1 EP 0687813 A1 EP0687813 A1 EP 0687813A1 EP 95107768 A EP95107768 A EP 95107768A EP 95107768 A EP95107768 A EP 95107768A EP 0687813 A1 EP0687813 A1 EP 0687813A1
Authority
EP
European Patent Office
Prior art keywords
control rod
injection pump
stop
pump element
steering lever
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
EP95107768A
Other languages
German (de)
French (fr)
Other versions
EP0687813B1 (en
Inventor
Rolf Preuss
Josef Vonnahme
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.)
Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0687813A1 publication Critical patent/EP0687813A1/en
Application granted granted Critical
Publication of EP0687813B1 publication Critical patent/EP0687813B1/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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F02M59/28—Mechanisms therefor
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing

Definitions

  • the invention relates to a method and a device for mounting an injection pump element of an internal combustion engine, the injection pump element having a plunger which has a steering lever carrying an adjusting pin for adjusting the fuel delivery quantity, the adjusting pin being insertable into a recess in a control rod.
  • the invention is based on the object of specifying or providing a method and a device for assembling an injection pump element which is improved over the prior art shown.
  • the method according to the invention is designed in such a way that the control rod is pressed against a resilient control rod stop during the assembly of the injection pump elements and that in this mounting position the steering lever is rotated against its own stop and inserted and fixed in the recess of the control rod with the adjusting pin. With this method, the control rod is deliberately and specifically adjusted a little more during assembly than is possible in normal operation by the controller.
  • the individual injection pump elements are then aligned with the control rod.
  • This method ensures that, in normal operation, when the controller moves the control rod, when the control rod bears against the control rod stop, the steering lever of the injection pump element does not yet abut its stop. This ensures that the adjustment pin or the steering lever can be moved freely in all operating conditions without hitting a stop. This eliminates the risk of possible damage.
  • the Control rod stop designed so resiliently that it is loaded, for example, with a force of 500 Newtons during the assembly of the injection pump elements and yields by a certain amount at precisely this load.
  • the controller moves the control rod at a maximum speed such that a force of, for example, 300 Newtons occurs. This force is therefore not sufficient to adjust the control rod stop by the additional distance that is possible during assembly.
  • the steering lever of the injection pump element is turned against the stop in order to adjust the basic delivery quantity and the adjusting pin is pressed against the direction of assembly movement of the control rod. This procedure ensures that the steering lever cannot hit its stop during normal operation of the internal combustion engine and the controller. Possible damage is therefore excluded.
  • the setting of the basic delivery rate is not affected by this, since the steering lever can be adjusted by a small adjustment path from the stop to an adjustment of the basic delivery rate without influencing the delivery rate.
  • the stop is a spring.
  • This spring can be designed in a wide variety of ways, and in all variations it has to meet the requirement that when the injection pump elements are mounted, the control rod can be adjusted by a small amount more than in the normal regulator movement.
  • the stop is an adapter sleeve.
  • a clamping sleeve is particularly suitable as a resilient control rod stop, since the basic construction of the control rod stop is designed as a spring element.
  • the spring travel is dimensioned such that it is between 0.1 and 0.6, preferably 0.3 mm. This dimension is sufficient to reliably prevent the adjusting pin or the steering lever from hitting the stop of the injection pump element.
  • injection pump elements 1, 1 'shown in FIG. 1 are identical in terms of their structure and are inserted directly into the crankcase of a self-igniting internal combustion engine.
  • the invention is not limited to internal combustion engines or injection pump elements 1, 1 'designed in this way, but can also be applied to injection pump elements which are used in a separate housing, for example in-line injection pumps.
  • the injection pump elements 1, 1 'each have a cylindrical base body 2, in each of which a plunger 3 can be moved axially and radially.
  • the fuel is conveyed from a low-pressure system into a high-pressure system, and the quantity of fuel delivered is determined by the radial rotational position of the plunger 3, which is provided with an inclined edge control.
  • the individual injection pump elements 1, 1 'must be set so that they promote the same delivery rates with a common radial adjustment of the plungers 3.
  • the common radial rotation of the plunger 3 takes place via steering levers 4, which are firmly connected to the plunger 3 and each carry an adjusting pin 5 on the end facing away from the plunger 3.
  • This adjustment pin 5 protrudes in the normal position Recess 6 of a control rod 7 and is guided by this. If the control rod 7 is moved in its axial direction, it thus simultaneously rotates the plungers 3 by the same amounts. To adjust the basic delivery rate, the control rod 7 is moved in the assembly movement direction 8, for example by an assembly tool, until it rests with an end stop 9 of a longitudinal recess 10 on a clamping sleeve 11 and by the force applied by the assembly tool at least a part of the clamping sleeve 11 is resilient shifts in the assembly movement direction 8.
  • the individual injection pump elements are subjected to a constant torque. This already leads to a high setting accuracy, which is sufficient for many applications.
  • the individual injection pump elements 1, 1 ' can have different frictional moments when the pump elements are rotated. If the adjusting pin 5 is now turned against the side wall of the recess 6, the torque to be applied increases. Now, while the injection pump element 1 'is rotated further by an amount a until the constant torque is reached, the injection pump element 1 can be rotated by an amount b until the constant torque is reached if its frictional torque is lower.
  • the base body 2 of the injection pump elements 1, 1 ' is in turn rotated until the adjustment pins 5 rest on the side wall of the recess 6 of the control rod 7.
  • the torque to be applied is measured.
  • a constant amount is added to the previously measured torque and the base body 2 is rotated further with this increased torque. This results in a constant additional rotation by a distance c for both injection pump elements 1, 1 ', which ensures an identical setting of the basic delivery rate of all injection pump elements 1, 1'.
  • the invention is not limited to the setting of the basic delivery rate of 2 injection pump elements, but any number of injection pump elements can be set using the method according to the invention.
  • FIG. 2 shows the clamping sleeve 11, which is inserted into a holding piece 14.
  • a bore 15 is machined into the holding piece 14, into which the clamping sleeve 11 can be driven.
  • An opening 16 for receiving the control rod 7 is machined into the holding piece 14 at right angles to the bore 15.
  • the control rod 7 is inserted into the opening so that it cooperates with the longitudinal recess 10 with the bore 15.
  • the clamping sleeve 11 is driven into the bore 15.
  • the control rod 7 can now be moved until it lies against the clamping sleeve 11 with the end stop 9.
  • the control rod can then be moved further by a small distance of preferably 0.3 mm with increased effort. This is achieved in that the clamping sleeve 11 has slots 17 on both sides of the opening, which form a spring element in the area interacting with the end stop 9 of the control rod 7.
  • FIGS. 3 and 4 show further details, FIG. 4 in particular showing an embodiment of the end stop 9 ′ which differs from that of FIG. 1.

Landscapes

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

Abstract

The method involves pressing the control rod (7) of the injection pump element (1,1') against a spring-loaded control rod stop. In this position the linkage lever (4) is turned against a stop (13) and has an adjustment pin (5) held in the recess (6) of the control rod. The linkage lever is turned against the stop (13) to adjust the basic delivery quantity. The adjustment pin is pressed against the installation movement direction (8) of the control rod. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Montieren eines Einspritzpumpenelementes einer Brennkraftmaschine, wobei das Einspritzpumpenelement einen Plunger aufweist, der zur Verstellung der Kraftstoffördermenge einen einen Verstellstift tragenden Lenkhebel aufweist, wobei der Verstellstift in eine Ausnehmung einer Regelstange einsetzbar ist.The invention relates to a method and a device for mounting an injection pump element of an internal combustion engine, the injection pump element having a plunger which has a steering lever carrying an adjusting pin for adjusting the fuel delivery quantity, the adjusting pin being insertable into a recess in a control rod.

Ein derartiges Verfahren und eine derartige Vorrichtung sind aus der DE-OS 42 07 702 bekannt. Zum Montieren und Einstellen der Einspritzpumpenelemente wird die Regelstange gegen einen festen Anschlagstift, der in eine Längsnut der Regelstange eingreift, gedrückt und festgehalten. In dieser Stellung der Regelstange werden die Einspritzpumpenelemente mit einem Verstellstift, der über einen Lenkhebel mit dem Plunger des Einspritzpumpenelementes verbunden ist, in eine Ausnehmung der Regelstange eingesetzt und das Einspritzpumpenelemente so verdreht, daß der Lenkhebel an einem Anschlag des Einspritzpumpenelementes anliegt. In dieser Stellung wird dann das Einspritzpumpenelement festgeschraubt.Such a method and such a device are known from DE-OS 42 07 702. To assemble and adjust the injection pump elements, the control rod is pressed and held against a fixed stop pin that engages in a longitudinal groove of the control rod. In this position of the control rod, the injection pump elements are inserted into a recess in the control rod with an adjusting pin, which is connected to the plunger of the injection pump element via a steering lever, and the injection pump elements are rotated so that the steering lever rests against a stop of the injection pump element. In this position the injection pump element is then screwed on.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Montage eines Einspritzpumpenelementes anzugeben bzw. bereitzustellen, daß gegenüber dem aufgezeigten Stand der Technik verbessert ist.The invention is based on the object of specifying or providing a method and a device for assembling an injection pump element which is improved over the prior art shown.

Diese Aufgabe wird durch die erfindungsgemäßen Merkmale der unabhängigen Patentansprüche gelöst. Dabei lag dem Wunsch nach einer Verbesserung des Montageverfahrens gegenüber dem Stand der Technik die Erkenntnis zugrunde, daß bei den bisher montierten Einspritzpumpenelementen Beschädigungen an dem Verstellstift und dem Lenkhebel auftreten konnten. Nach den der Erfindung zugrunde liegenden Erkenntnissen wurden die Beschädigungen durch den Regler verursacht, der während des Regelvorgangs die Regelstange mit hoher Geschwindigkeit bewegt. Dabei stößt die Regelstange gegen einen in einer Längsnut der Regelstange angeordneten starten Regelstangenanschlag, wobei dieser Regelstangenanschlag aber gleichzeitig für die Einstellung des Lenkhebels an dessen Anschlag benuzt wird. Wird nun der Lenkhebel und daher auch der Verstellstift um ein auch nur geringes Maß bei der Montage gegenüber dem Regelstangenanschlag so verdreht, daß die Regelstange bei den vom Regler hervorgerufenen Bewegungen nicht gegen den Regelstangenanschlag sondern gegen den Anschlag des Lenkhebels anstieß, so konnte durch die hohen wirkenden Kräften der Verstellstift oder der Lenkhebel beschädigt werden. Dieser Nachteil wird durch die erfindungsgemäße Vorrichtung und das erfindungsgemäße Verfahren vermieden. Dabei ist das erfindunsgemäße Verfahren derart ausgestaltet, daß die Regelstange bei der Montage der Einspritzpumpenelemente gegen einen federnd nachgiebigen Regelstangenanschlag gedrückt wird und daß in dieser Montagestellung der Lenkhebel gegen einen eigenen Anschlag gedreht mit dem Verstellstift in die Ausnehmung der Regelstange eingesetzt und befestigt wird. Durch dieses Verfahren wird die Regelstange bei der Montage bewußt und gezielt um ein geringes Maß weiter verstellt als dies im Normalbetrieb durch den Regler möglich ist. In dieser Montageposition werden dann die einzelnen Einspritzpumpenelemente zu der Regelstange ausgerichtet. Durch dieses Verfahren ist gewährleistet, daß im normalen Betrieb, wenn der Regler die Regelstange bewegt, bei einem Anliegen der Regelstange an dem Regelstangenanschlag der Lenkhebel des Einspritzpumpenelementes gerade noch nicht an seinem Anschlag anliegt. Dadurch ist sichergestellt, daß der Verstellstift bzw. der Lenkhebel bei allen Betriebsbedingungen frei bewegt werden können ohne gegen einen Anschlag anzustoßen. Dadurch ist die Gefahr von möglichen Beschädigungen ausgeschaltet. In Weiterbildung ist dabei der Regelstangenanschlag so federnd nachgiebig ausgestaltet, daß er beispielsweise bei der Montage der Einspritzpumpenelemente mit einer Kraft von 500 Newton belastet wird und bei eben dieser Last um ein bestimmtes Wegmaß nachgibt. Im normalen Betrieb der Brennkraftmaschine bewegt der Regler die Regelstange maximal mit einer solchen Geschwindigkeit, daß eine Kraft von beispielsweise 300 Newton auftritt. Diese Kraft reicht somit nicht aus, den Regelstangenanschlag um das bei der Montage mögliche zusätzliche Wegmaß zu verstellen.This object is achieved by the features of the independent claims according to the invention. The desire for an improvement in the assembly method compared with the prior art was based on the knowledge that damage to the adjusting pin and the steering lever could occur in the injection pump elements previously installed. According to the knowledge on which the invention is based, the damage was caused by the controller, which moves the control rod at high speed during the control process. The control rod abuts against a control rod stop arranged in a longitudinal groove of the control rod, but this control rod stop is also used for adjusting the steering lever at its stop. If the steering lever and therefore also the adjusting pin is now rotated by a small amount during assembly relative to the control rod stop, so that the control rod does not hit the control rod stop but the stop of the steering lever during the movements caused by the controller forces acting on the adjustment pin or the steering lever. This disadvantage is avoided by the device and the method according to the invention. The method according to the invention is designed in such a way that the control rod is pressed against a resilient control rod stop during the assembly of the injection pump elements and that in this mounting position the steering lever is rotated against its own stop and inserted and fixed in the recess of the control rod with the adjusting pin. With this method, the control rod is deliberately and specifically adjusted a little more during assembly than is possible in normal operation by the controller. In this assembly position, the individual injection pump elements are then aligned with the control rod. This method ensures that, in normal operation, when the controller moves the control rod, when the control rod bears against the control rod stop, the steering lever of the injection pump element does not yet abut its stop. This ensures that the adjustment pin or the steering lever can be moved freely in all operating conditions without hitting a stop. This eliminates the risk of possible damage. In continuing education is the Control rod stop designed so resiliently that it is loaded, for example, with a force of 500 Newtons during the assembly of the injection pump elements and yields by a certain amount at precisely this load. In normal operation of the internal combustion engine, the controller moves the control rod at a maximum speed such that a force of, for example, 300 Newtons occurs. This force is therefore not sufficient to adjust the control rod stop by the additional distance that is possible during assembly.

In Weiterbildung der Erfindung wird der Lenkhebel des Einspritzpumpenelementes zur Einstellung der Grund-Fördermenge gegen den Anschlag gedreht und der Verstellstift gegen die Montagebewegungsrichtung der Regelstange gedrückt. Durch dieses Verfahren ist sichergestellt, daß bei normalen Betrieb der Brennkraftmaschine und des Reglers der Lenkhebel nicht gegen seinen Anschlag stoßen kann. Mögliche Beschädigungen sind daher ausgeschlossen. Die Einstellung der Grund-Fördermenge ist dadurch nicht beeinflußt, da der Lenkhebel von dem Anschlag bis zu einer Verstellung der Grund-Fördermenge um einen kleinen Verstellweg ohne eine Beeinflussung der Fördermenge verstellt werden kann.In a further development of the invention, the steering lever of the injection pump element is turned against the stop in order to adjust the basic delivery quantity and the adjusting pin is pressed against the direction of assembly movement of the control rod. This procedure ensures that the steering lever cannot hit its stop during normal operation of the internal combustion engine and the controller. Possible damage is therefore excluded. The setting of the basic delivery rate is not affected by this, since the steering lever can be adjusted by a small adjustment path from the stop to an adjustment of the basic delivery rate without influencing the delivery rate.

Bei den Weiterbildungen zu der entsprechenden Vorrichtung ist vorgesehen, daß der Anschlag eine Feder ist. Diese Feder kann in verschiedenster Art ausgebildet sein, wobei sie in allen Variationen das Erfordernis zu erfüllen hat, daß sie bei der Montage der Einspritzpumpenelemente die Regelstange um ein geringes Wegmaß weiter als in der normalen Reglerbewegung verstellbar ist.In the developments of the corresponding device, it is provided that the stop is a spring. This spring can be designed in a wide variety of ways, and in all variations it has to meet the requirement that when the injection pump elements are mounted, the control rod can be adjusted by a small amount more than in the normal regulator movement.

In Weiterbildung der Erfindung ist der Anschlag eine Spannhülse. Eine Spannhülse eignet sich besonders als federnd nachgiebiger Regelstangenanschlag, da diese schon von ihrer Grundkonstruktion her als Federelement ausgebildet ist. Dabei kann in Weiterbildung der Erfindung aber auch vorgesehen sein, in die Spannhülse bewußt ein zusätzliches Federelement zu integrieren. Dieses wird bevorzugt durch zwei übereinanderliegende Schlitze in der Spannhülse bewirkt. Dieses Federelement wirkt dann mit der Regelstange zusammen.In a development of the invention, the stop is an adapter sleeve. A clamping sleeve is particularly suitable as a resilient control rod stop, since the basic construction of the control rod stop is designed as a spring element. In a further development of the invention, provision can also be made to consciously integrate an additional spring element into the clamping sleeve. This is preferably effected by two slits lying one above the other in the clamping sleeve. This spring element then interacts with the control rod.

Dabei ist in Weiterbildung der Erfindung der Federweg so bemessen, daß dieser zwischen 0,1 und 0,6, vorzugsweise 0,3 mm beträgt. Dieses Maß reicht aus, um ein Auftreffen des Verstellstiftes bzw. des Lenkhebels auf dem Anschlag des Einspritzpumpenelementes sicher zu vermeiden.In a further development of the invention, the spring travel is dimensioned such that it is between 0.1 and 0.6, preferably 0.3 mm. This dimension is sufficient to reliably prevent the adjusting pin or the steering lever from hitting the stop of the injection pump element.

Vorteilhafte Weiterbildungen der Erfindung sind in der das in den Figuren dargestellte Ausführungsbeispiel beschreibenden Zeichnungsbeschreibung der Erfindung näher erläutert. Es zeigen:

Figur 1:
Zwei Einspritzpumpenelemente, die mit einer Regelstange zusammenwirken,
Figur 2:
einen Schnitt durch ein Haltestück einer Spannhülse mit einer anliegenden Regelstange,
Figur 3:
einen Schnitt A-A gemäß Figur 2 und
Figur 4:
einen Schnitt B-B gemäß Figur 2.
Advantageous developments of the invention are explained in more detail in the drawing description of the invention that describes the exemplary embodiment shown in the figures. Show it:
Figure 1:
Two injection pump elements, which interact with a control rod,
Figure 2:
a section through a holding piece of an adapter sleeve with an adjacent control rod,
Figure 3:
a section AA according to Figure 2 and
Figure 4:
2 shows a section BB according to FIG. 2.

Die in Figur 1 dargestellten Einspritzpumpenelemente 1, 1', sind von ihrem Aufbau her gesehen identisch und werden direkt in das Kurbelgehäuse einer selbstzündenden Brennkraftmaschine eingesteckt. Die Erfindung ist allerdings nicht auf derartig ausgebildete Brennkraftmaschinen bzw. Einspritzpumpenelemente 1, 1' beschränkt, sondern kann auch bei Einspritzpumpenelementen angewendet werden, die in ein separates Gehäuse als beispielsweise Reiheneinspritzpumpen eingesetzt werden.The injection pump elements 1, 1 'shown in FIG. 1 are identical in terms of their structure and are inserted directly into the crankcase of a self-igniting internal combustion engine. However, the invention is not limited to internal combustion engines or injection pump elements 1, 1 'designed in this way, but can also be applied to injection pump elements which are used in a separate housing, for example in-line injection pumps.

Die Einspritzpumpenelemente 1, 1' weisen je einen zylindrischen Grundkörper 2 auf, in dem jeweils ein Plunger 3 axial und radial bewegbar ist. Durch die axiale Bewegung wird der Kraftstoff von einem Niederdrucksystem in ein Hochdrucksystem gefördert und die Menge des geförderten Kraftstoffs wird durch die radiale Drehstellung des mit einer Schrägkantensteuerung versehenen Plungers 3 festgelegt. Dementsprechend müssen die einzelnen Einspritzpumpenelemente 1, 1' so eingestellt werden, daß sie bei einer gemeinsamen Radialverstellung der Plunger 3 gleiche Fördermengen fördern. Die gemeinsame radiale Verdrehung der Plunger 3 erfolgt über Lenkhebel 4, die mit dem Plunger 3 fest verbunden sind und auf dem dem Plunger 3 abgewandten Ende jeweils einen Verstellstift 5 tragen. Dieser Verstellstift 5 ragt in der Normalstellung in eine Ausnehmung 6 einer Regelstange 7 und wird von dieser geführt. Wird die Regelstange 7 in ihrer Achsrichtung verschoben, verdreht sie somit gleichzeitig die Plunger 3 um jeweils gleiche Beträge. Zum Einstellen der Grund-Fördermenge wird die Regelstange 7 in Montagebewegungsrichtung 8 beispielsweise durch ein Montagewerkzeug so bewegt, bis sie mit einem Endanschlag 9 einer Längsausnehmung 10 an einer Spannhülse 11 anliegt und durch die durch das Montagewerkzeug aufgebrachte Kraft zumindest einen Teil der Spannhülse 11 federnd nachgiebig in Montagebewegungsrichtung 8 verschiebt. In dieser Stellung wird die Regelstange 7 blockiert und die Einspritzpumpenelemente 1, 1' mit ihrem Grundkörper 2 in Richtung der Pfeile 12 mit dem Lenkhebel 4 und dem Verstellstift 5 in die Ausnehmung 6 der Regelstange 7 eingedreht. Während des Eindrehvorgangs liegt der Lenkhebel 4 an einem Anschlag des Grundkörpers 2 an. Nachdem die Einspritzpumpenelemente 1, 1' derart eingesetzt sind, werden sie in dieser Stellung festgeschraubt und anschließend das die Regelstange festhaltende Montagewerkzeug entfernt. Damit bewegt sich die Regelstange 7 um einen geringen Wegbetrag entgegen der Montagebewegungsrichtung 8 zurück und entfernt somit die Verstellstifte 5 bzw. die Lenkhebel 4 um einen geringen Betrag von den jeweiligen Anschlägen 13. Während des Betriebs der Brennkraftmaschine kann nunmehr der Regler die Regelstange nur noch so weit bewegen, bis sie an die Spannhülse 11 anliegt ohne diese federnd nachgiebig zu bewegen.The injection pump elements 1, 1 'each have a cylindrical base body 2, in each of which a plunger 3 can be moved axially and radially. As a result of the axial movement, the fuel is conveyed from a low-pressure system into a high-pressure system, and the quantity of fuel delivered is determined by the radial rotational position of the plunger 3, which is provided with an inclined edge control. Accordingly, the individual injection pump elements 1, 1 'must be set so that they promote the same delivery rates with a common radial adjustment of the plungers 3. The common radial rotation of the plunger 3 takes place via steering levers 4, which are firmly connected to the plunger 3 and each carry an adjusting pin 5 on the end facing away from the plunger 3. This adjustment pin 5 protrudes in the normal position Recess 6 of a control rod 7 and is guided by this. If the control rod 7 is moved in its axial direction, it thus simultaneously rotates the plungers 3 by the same amounts. To adjust the basic delivery rate, the control rod 7 is moved in the assembly movement direction 8, for example by an assembly tool, until it rests with an end stop 9 of a longitudinal recess 10 on a clamping sleeve 11 and by the force applied by the assembly tool at least a part of the clamping sleeve 11 is resilient shifts in the assembly movement direction 8. In this position, the control rod 7 is blocked and the injection pump elements 1, 1 'with their base 2 in the direction of the arrows 12 with the steering lever 4 and the adjusting pin 5 are screwed into the recess 6 of the control rod 7. During the screwing-in process, the steering lever 4 bears against a stop of the base body 2. After the injection pump elements 1, 1 'are inserted in this way, they are screwed tight in this position and then the assembly tool holding the control rod is removed. The control rod 7 thus moves back a small amount against the direction of assembly movement 8 and thus removes the adjusting pins 5 or the steering lever 4 from the respective stops 13 by a small amount move far until it rests on the clamping sleeve 11 without moving it resiliently.

Weiterhin werden bei einem einfachen Einstellverfahren der Fördermenge der Einspritzpumpenelemente die einzelnen Einspritzpumpenelemente mit einem konstanten Drehmoment beaufschlagt. Dies führt bereits zu einer hohen Einstellgenauigkeit, die für viele Anwendungsfälle ausreicht. Die einzelnen Einspritzpumpenelemente 1, 1' können aber unterschiedliche Reibmomente beim Verdrehen der Pumpenelemente aufweisen. Wird nun der Verstellstift 5 gegen die Seitenwand der Ausnehmung 6 gedreht, erhöht sich das aufzubringende Drehmoment. Während nun das Einspritzpumpenelement 1' bis zum Erreichen des konstanten Drehmoments um einen Betrag a weitergedreht wird, kann das Einspritzpumpenelement 1 um einen Betrag b bis zum Erreichen des konstanten Drehmoments weiterzudrehen sein, wenn dessen Reibmoment geringer ist.Furthermore, with a simple adjustment method of the delivery rate of the injection pump elements, the individual injection pump elements are subjected to a constant torque. This already leads to a high setting accuracy, which is sufficient for many applications. However, the individual injection pump elements 1, 1 'can have different frictional moments when the pump elements are rotated. If the adjusting pin 5 is now turned against the side wall of the recess 6, the torque to be applied increases. Now, while the injection pump element 1 'is rotated further by an amount a until the constant torque is reached, the injection pump element 1 can be rotated by an amount b until the constant torque is reached if its frictional torque is lower.

Bei einem verbesserten Einstellverfahren werden die Grundkörper 2 der Einspritzpumpenelemente 1, 1' wiederrum so weit verdreht, bis die Verstellstifte 5 an der Seitenwand der Ausnehmung 6 der Regelstange 7 anliegen. Dabei wird das aufzubringende Drehmoment gemessen. Nach dem Anliegen des Verstellstiftes 5 an der Seitenwand oder schon während des Drehvorganges wird nun auf das bisher gemessene Drehmoment ein jeweils konstanter Betrag aufaddiert und mit diesem erhöhten Drehmoment wird der Grundkörper 2 weitergedreht. Dadurch ergibt sich für beide Einspritzpumpenelemente 1, 1' eine konstante Zusatzverdrehung um eine Wegstrecke c, womit eine identische Einstellung der Grund-Fördermenge von allen Einspritzpumpenelementen 1, 1' sichergestellt ist.In an improved setting method, the base body 2 of the injection pump elements 1, 1 'is in turn rotated until the adjustment pins 5 rest on the side wall of the recess 6 of the control rod 7. The torque to be applied is measured. After the adjusting pin 5 bears against the side wall or already during the turning process, a constant amount is added to the previously measured torque and the base body 2 is rotated further with this increased torque. This results in a constant additional rotation by a distance c for both injection pump elements 1, 1 ', which ensures an identical setting of the basic delivery rate of all injection pump elements 1, 1'.

Im übrigen ist die Erfindung nicht auf die Einstellung der Grund-Fördermenge von 2 Einspritzpumpenelementen beschränkt, sondern es kann eine beliebige Anzahl von Einspritzpumpenelementen mit dem erfindungsgemäßen Verfahren eingestellt werden.Otherwise, the invention is not limited to the setting of the basic delivery rate of 2 injection pump elements, but any number of injection pump elements can be set using the method according to the invention.

Figur 2 zeigt die Spannhülse 11, die in ein Haltestück 14 eingesetzt ist. Dabei ist in das Haltestück 14 eine Bohrung 15 eingearbeitet, in die die Spannhülse 11 eintreibbar ist. Rechtwinklig zu der Bohrung 15 ist in das Haltestück 14 eine Öffnung 16 zur Aufnahme der Regelstange 7 eingearbeitet. Dabei wird zunächst die Regelstange 7 in die Öffnung eingeschoben, so daß diese mit der Längsausnehmung 10 mit der Bohrung 15 zusammenwirkt. Danach wird die Spannhülse 11 in die Bohrung 15 eingetrieben. Die Regelstange 7 ist nun soweit bewegbar, bis sie mit dem Endanschlag 9 an der Spannhülse 11 anliegt. Zur Montage der Einspritzpumpenelemente 1, 1' ist die Regelstange dann noch um eine geringe Wegstrecke von vorzugsweise 0,3 mm unter erhöhtem Kraftaufwand weiter bewegbar. Dies wird dadurch erreicht, daß die Spannhülse 11 beidseits der Öffnung 16 Schlitze 17 aufweist, die in dem mit dem Endanschlag 9 der Regelstange 7 zusammenwirkenden Bereich ein Federelement bilden.Figure 2 shows the clamping sleeve 11, which is inserted into a holding piece 14. In this case, a bore 15 is machined into the holding piece 14, into which the clamping sleeve 11 can be driven. An opening 16 for receiving the control rod 7 is machined into the holding piece 14 at right angles to the bore 15. First, the control rod 7 is inserted into the opening so that it cooperates with the longitudinal recess 10 with the bore 15. Then the clamping sleeve 11 is driven into the bore 15. The control rod 7 can now be moved until it lies against the clamping sleeve 11 with the end stop 9. To assemble the injection pump elements 1, 1 ', the control rod can then be moved further by a small distance of preferably 0.3 mm with increased effort. This is achieved in that the clamping sleeve 11 has slots 17 on both sides of the opening, which form a spring element in the area interacting with the end stop 9 of the control rod 7.

Die Figuren 3 und 4 zeigen weitere Einzelheiten, wobei in Figur 4 insbesondere eine gegenüber der Figur 1 abweichende Ausgestaltung des Endanschlags 9' dargestellt ist.FIGS. 3 and 4 show further details, FIG. 4 in particular showing an embodiment of the end stop 9 ′ which differs from that of FIG. 1.

Claims (8)

Verfahren zum Montieren eines Einspritzpumpenelementes einer Brennkraftmaschine, wobei das Einspritzpumpenelement einen Plunger aufweist, der zur Verstellung der Kraftstoffördermenge einen einen Verstellstift tragenden Lenkhebel aufweist, wobei der Verstellstift in eine Ausnehmung einer Regelstange einsetzbar ist,
dadurch gekennzeichnet, daß die Regelstange (7) bei der Montage der Einspritzpumpenelemente (1, 1') gegen einen federnd nachgiebigen Regelstangenanschlag gedrückt wird, und daß in dieser Montagestellung der Lenkhebel (4) gegen einen eigenen Anschlag (13) gedreht mit dem Verstellstift (5) in die Ausnehmung (6) der Regelstange (7) eingesetzt und befestigt wird.Method for assembling an injection pump element of an internal combustion engine, the injection pump element having a plunger which has a steering lever which carries an adjusting pin for adjusting the fuel delivery quantity, the adjusting pin being insertable into a recess in a control rod,
characterized in that the control rod (7) is pressed against a resilient control rod stop during the assembly of the injection pump elements (1, 1 '), and in that in this mounting position the steering lever (4) is rotated against its own stop (13) with the adjusting pin ( 5) is inserted and fastened in the recess (6) of the control rod (7). Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß der Lenkhebel (4) des Einspritzpumpenelementes (1, 1') zur Einstellung der Grund-Fördermenge gegen den Anschlag (13) gedreht wird und der Verstellstift (5) gegen die Montagebewegungsrichtung (8) der Regelstange (7) gedrückt wird.Method according to claim 1,
characterized in that the steering lever (4) of the injection pump element (1, 1 ') is turned against the stop (13) to adjust the basic delivery quantity and the adjusting pin (5) is pressed against the direction of assembly movement (8) of the control rod (7) . Vorrichtung zum Montieren eines Einspritzpumpenelementes einer Brennkraftmaschine, wobei das Einspritzpumpenelement einen Plunger aufweist, der zur Verstellung der Kraftstoffördermenge einen einen Verstellstift tragenden Lenkhebel aufweist, wobei der Verstellstift in eine Ausnehmung einer Regelstange einsetzbar ist,
dadurch gekennzeichnet, daß die Regelstange (7) bei der Montage der Einspritzpumpenelemente (1, 1') gegen einen federnd nachgiebigen Regelstangenanschlag verschiebbar ist.Device for mounting an injection pump element of an internal combustion engine, the injection pump element having a plunger which has a steering lever which carries an adjusting pin for adjusting the fuel delivery quantity, the adjusting pin being insertable into a recess in a control rod,
characterized in that the control rod (7) can be displaced against a resilient control rod stop when the injection pump elements (1, 1 ') are installed. Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß der Regelstangenanschlag eine Feder ist.Device according to claim 3,
characterized in that the control rod stop is a spring. Vorrichtung nach einem der Ansprüche 3 oder 4,
dadurch gekennzeichnet, daß der Regelstangenanschlag eine Spannhülse (11) ist.Device according to one of claims 3 or 4,
characterized in that the control rod stop is an adapter sleeve (11). Vorrichtung nach einem der Ansprüche 3 bis 5,
dadurch gekennzeichnet, daß die Spannhülse (11) ein Federelement aufweist.Device according to one of claims 3 to 5,
characterized in that the clamping sleeve (11) has a spring element. Vorrichtung nach einem der Ansprüche 3 bis 6,
dadurch gekennzeichnet, daß die Spannhülse (11) zwei Schlitze (17) aufweist, die das Federelement begrenzen.Device according to one of claims 3 to 6,
characterized in that the clamping sleeve (11) has two slots (17) which delimit the spring element. Vorrichtung nach einem der Ansprüche 3 bis 6,
dadurch gekennzeichnet, daß der Federweg 0,1 bis 0,6 mm, vorzugsweise 0,3 mm beträgt.Device according to one of claims 3 to 6,
characterized in that the spring travel is 0.1 to 0.6 mm, preferably 0.3 mm.
EP95107768A 1994-06-16 1995-05-22 Method for mounting an injection pump element and such an element Expired - Lifetime EP0687813B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4421087A DE4421087A1 (en) 1994-06-16 1994-06-16 Method and device for mounting an injection pump element
DE4421087 1994-06-16

Publications (2)

Publication Number Publication Date
EP0687813A1 true EP0687813A1 (en) 1995-12-20
EP0687813B1 EP0687813B1 (en) 1998-01-14

Family

ID=6520765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107768A Expired - Lifetime EP0687813B1 (en) 1994-06-16 1995-05-22 Method for mounting an injection pump element and such an element

Country Status (3)

Country Link
US (1) US5647320A (en)
EP (1) EP0687813B1 (en)
DE (2) DE4421087A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2304829A (en) * 1995-09-02 1997-03-26 Bosch Gmbh Robert Fuel-injection pump for internal combustion engines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19605563B4 (en) * 1996-02-15 2005-06-09 Deutz Ag Method for mounting an injection pump element to an internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207702A1 (en) 1992-03-11 1993-09-16 Kloeckner Humboldt Deutz Ag Method of setting fuel injection system of IC engine - involves controlling piston rotation by levers with pins attached which engage slot in control rod, equal torque is applied to each piston

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1775842A1 (en) * 1966-02-28 1970-01-29 Borg Warner Coupling device, in particular vehicle coupling between engine and output shaft
DE2838919C2 (en) * 1978-09-07 1986-02-20 Robert Bosch Gmbh, 7000 Stuttgart Centrifugal governor for internal combustion engines
US4448166A (en) * 1980-11-28 1984-05-15 Yanmar Diesel Engine Co., Ltd. Overhead cam type diesel engine
JPS57183532A (en) * 1981-05-07 1982-11-11 Nippon Denso Co Ltd Electric speed governor
US4432320A (en) * 1981-06-10 1984-02-21 Friedmann & Maier Aktiengesellschaft Control equipment for adjusting the moment of fuel injection and/or amount of fuel supplied by a fuel injection pump, for internal combustion engines
IT8223142V0 (en) * 1982-10-11 1982-10-11 Same Spa DELIVERY REGULATION CONTROL UNIT FOR INJECTION PUMPS ARRANGED IN LINE.
SE455008B (en) * 1983-05-16 1988-06-13 Yanmar Diesel Engine Co FOR FUEL QUANTITY CONTROL DEVICE FOR DIESEL ENGINE WITH VERTICAL VEHICLE AXLE
DE3539963A1 (en) * 1984-11-27 1986-06-05 Steyr-Daimler-Puch Ag, Wien DEVICE FOR COUPLING A SLIDING ACTUATOR ROD WITH A CONTROL UNIT, IN PARTICULAR WITH THE CONTROL ROD OF AN INJECTION UNIT OF AN INTERNAL COMBUSTION ENGINE
US4850321A (en) * 1986-03-26 1989-07-25 Ail Corporation Preloaded compliant linkage for fuel injection pump rack
DE4243771C2 (en) * 1992-12-23 2003-10-23 Deutz Ag Diesel engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207702A1 (en) 1992-03-11 1993-09-16 Kloeckner Humboldt Deutz Ag Method of setting fuel injection system of IC engine - involves controlling piston rotation by levers with pins attached which engage slot in control rod, equal torque is applied to each piston

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2304829A (en) * 1995-09-02 1997-03-26 Bosch Gmbh Robert Fuel-injection pump for internal combustion engines
GB2304829B (en) * 1995-09-02 1997-11-05 Bosch Gmbh Robert Fuel injection pump for internal combustion engines

Also Published As

Publication number Publication date
US5647320A (en) 1997-07-15
DE59501255D1 (en) 1998-02-19
EP0687813B1 (en) 1998-01-14
DE4421087A1 (en) 1995-12-21

Similar Documents

Publication Publication Date Title
DE3590194C2 (en) Fuel injection pump
DE2845095A1 (en) CONTROL DEVICE FOR A FUEL INJECTION PUMP
DE2845139A1 (en) CONTROL DEVICE FOR A FUEL INJECTION PUMP
DE19913679B4 (en) Pinned injector assembly
EP1775460B1 (en) Fuel injection valve
EP0055245B1 (en) Device for adjusting and coordinating a plurality of injection devices
EP0090226A1 (en) Method and apparatus for mounting an injection pump on an internal-combustion engine
EP0687813B1 (en) Method for mounting an injection pump element and such an element
DE2929176C2 (en) Distributor fuel injection pumps for internal combustion engines
DE3102801C2 (en)
DE4129837C2 (en) Speed controller for fuel injection pumps of internal combustion engines
DE3344723A1 (en) ADJUSTMENT DEVICE FOR SETTING THE INITIAL INJECTION STROKE OF A DOUBLE INJECTION TYPE VALVE
DE2260533C3 (en) Control linkage for adjusting the delivery rate of several fuel injection pumps arranged in series one behind the other
DE3138640C2 (en)
DE4207702A1 (en) Method of setting fuel injection system of IC engine - involves controlling piston rotation by levers with pins attached which engage slot in control rod, equal torque is applied to each piston
AT387823B (en) Auxiliary device for an actuating rod of the regulating members provided on pump/nozzle assemblies of fuel- injection internal combustion engines
EP0515816A1 (en) Fuel injection pump for internal combustion engines
DE3814529C2 (en)
DE3929548C2 (en) Device for equalizing the delivery rate of fuel injection pumps
EP0624720B1 (en) Fuel injection pump for internal combustion engines
DE3539963C2 (en)
EP0355666B1 (en) Fuel injection device with torque control for internal-combustion engines
AT390125B (en) DEVICE FOR COUPLING A SLIDING ACTUATOR ROD WITH A CONTROL UNIT, IN PARTICULAR A CONTROL ROD OF AN INJECTION UNIT OF AN INTERNAL COMBUSTION ENGINE
DE2655501C2 (en) Fuel injection pump for internal combustion engines
DE1800919C3 (en) Device for adjusting the delivery rate of the pump elements of fuel injection pumps

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19951026

17Q First examination report despatched

Effective date: 19960216

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DEUTZ AKTIENGESELLSCHAFT

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 NL SE

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980114

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 19980114

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

Effective date: 19980116

REF Corresponds to:

Ref document number: 59501255

Country of ref document: DE

Date of ref document: 19980219

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980414

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: FR

Payment date: 20020411

Year of fee payment: 8

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

Ref country code: GB

Payment date: 20020417

Year of fee payment: 8

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: 20030522

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030522

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: 20040130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: DE

Payment date: 20100521

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59501255

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59501255

Country of ref document: DE

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: 20111130