EP0425801B1 - Centrifugal governor for internal combustion engines - Google Patents

Centrifugal governor for internal combustion engines Download PDF

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Publication number
EP0425801B1
EP0425801B1 EP90117627A EP90117627A EP0425801B1 EP 0425801 B1 EP0425801 B1 EP 0425801B1 EP 90117627 A EP90117627 A EP 90117627A EP 90117627 A EP90117627 A EP 90117627A EP 0425801 B1 EP0425801 B1 EP 0425801B1
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EP
European Patent Office
Prior art keywords
adjusting member
speed governor
supporting part
governor according
feed
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90117627A
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German (de)
French (fr)
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EP0425801A1 (en
Inventor
Sieghart Dipl.-Ing. Maier
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0425801A1 publication Critical patent/EP0425801A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D1/00Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D1/00Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/04Controlling 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
    • F02D1/045Controlling 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44Details, 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
    • F02M59/447Details, 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 means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine

Definitions

  • the invention relates to a centrifugal governor according to the preamble of claim 1.
  • Centrifugal speed regulators are known (CH-PS 319 357), in which the transmission of the control movements from the centrifugal weights to the delivery rate adjustment element is carried out by a regulator sleeve, the effective length of which can be changed by screwing into a thread.
  • This centrifugal speed governor also contains the additional function of actuating a shift lever in the manner of a starting quantity release lever; Usually its position is adjusted by the previously performed setting, which serves for an exact position assignment between the quantity adjusting element and the flyweights, and thus changes its desired position, so that the function intended for the start quantity release lever is impaired or even insufficient.
  • the position of the shift lever is influenced by components of the centrifugal speed controller, which in their combination form a tolerance chain, so that the total tolerance results in a large adjustment range for the shift lever.
  • the adjustment of the gearshift lever is usually carried out by bending the gearshift lever, the gearshift lever being able to break or at least crack due to the large adjustment range, as a result of which the function of the gearshift lever can be lost without prior notice during operation of the centrifugal speed controller.
  • the centrifugal speed governor according to the invention with the characterizing features of claim 1 has the advantage that the above disadvantages are avoided.
  • the centrifugal speed governor has a locking device with which the adjustment of the articulation position of the shift lever operating as a starting quantity release lever can be carried out sensitively and thus with fine tolerance.
  • the setting achieved in this way is ensured by the pretensioning force of a trailing spring in connection with the self-locking positive engagement of the toothing of the latching device.
  • This setting only affects the position of the shift lever and enables the starting quantity to be triggered precisely at a predetermined speed.
  • the adjusting member according to claim 2 has an axially movable stop pin, in which the end face referred to as the end edge, from which the actuation of the shift lever is based, is not based on a body-related measure of the contour of the adjusting member, but indirectly by means of a separate component, the stop pin, is formed and thus an individual attitude is given.
  • guide surfaces are attached directly to the stop pin, which, when the shift lever is adjusted, fix its rotational position in the support part by means of the stop pin.
  • an additional drag spring is inserted between the pressure piece and the support part or stop bolt, which enables a smaller axial stroke of the adjusting member and an advantageous change in the resulting spring constant.
  • FIG. 1 shows a simplified representation of a longitudinal section through the centrifugal force governor according to the invention
  • FIG. 2 shows a partial section of the first exemplary embodiment with the actuating element of FIG Centrifugal speed controller as part of a locking device, which is partially shown enlarged in Figure 2a and Figure 3 shows an alternative spring abutment for an additional drag spring of the second embodiment.
  • the centrifugal force governor shown in simplified form in FIG. 1 carries, in a housing 11, a centrifugal weight regulator 13 fastened on a drive shaft 12 of a known and otherwise only partially illustrated injection pump 15 for internal combustion engines, the centrifugal weights 14 of which, in a known manner, under the effect of the centrifugal force against the force of Control springs 16 transmit their control movement via angled lever 17 and connecting bolts 18 to an adjusting member 19 designed as a control sleeve.
  • the adjusting member 19 is connected to a control linkage 24, which is known to have an adjusting lever 25 which serves to set the rotational speed and can be swiveled within a limited angular range, the movements of which are known to a control rod 31, which positions an adjusting member 32, are transferred.
  • the path of the control rod 31 is limited in the direction of increasing flow rate by a stop 33 which interacts with a counter stop 35. As soon as the control linkage 24 strives to push the control rod 31 beyond the position delimited by the stop 33, the excess movement of the control linkage 24 is transmitted indirectly to the adjusting member 19. A trailing spring 36, which is also arranged in the adjusting member 19, is thus overpressed and the regulator linkage 24 is thus protected against overload.
  • the first exemplary embodiment has, as shown in FIG. 2 and partially enlarged in FIG. 2a, a recess 37 in the wall 21 through which the connecting bolt 18 is guided with play and can perform slight lateral evasive movements.
  • the pressure piece 34 is arranged within a longitudinal bore 38 of the adjusting member 19 delimited by the wall 21 and is coupled via an external end face 39 to the connecting bolt 18 and thus indirectly to the flyweights 14. With an inner end face 41, the pressure piece 34 lies on the drag spring 36, which is designed as a helical compression spring.
  • the trailing spring 36 is supported on an inner side 42 of a collar 43 of a supporting part 44, the supporting part 44 consisting of a basic body 46 which projects into the trailing spring 36 and the collar 43 which radially widens the basic body 46.
  • the collar 43 includes, again in a radial extension, a nose 47 which protrudes into a recess 48 in the wall 21 and thereby forms an anti-rotation device and, in accordance with the pretensioning force of the trailing spring 36, an axial securing device for the supporting part 44, based on its position in the adjusting member 19.
  • the recess 48 is wider than the axial dimension of the nose 47, so that the support part 44 is able to perform a slight compensating movement against the actuating force of the trailing spring 36.
  • the support part 44 is provided within its base body 46 in deviation from the circular shape with two flat, mutually parallel sections which serve as guide surfaces. These sections lead with movement play a head part 52 of a stop bolt 53, which is fitted with a corresponding shape and guide surfaces 51 in the base body 46 of the support part 44.
  • the stop pin 53 also includes a shaft 54 which is circular in cross section and which carries an external thread 56 which is in engagement with the internal thread 57 of an adjusting element 58 which partially surrounds the shaft 54.
  • the shaft 54 ends in an end edge 61 which projects beyond the end face 23 of the adjusting member 19 and which has a contour shaped like a lens head. From the end edge 61 is articulated in a known manner, as shown, for example, in CH-PS 319 357, a spring-loaded shift lever 62 which is only indicated and which, as a start quantity release lever, controls the positioning of the control rod 31 between the positions of full load quantity and start quantity via the of the stop 33 positioned thereon and the counter stop 35 connected to the quantity adjusting element 32.
  • the actuating element 58 has the basic shape of a narrow hollow cylinder which is mounted in the longitudinal bore 38 of the adjusting member 19 and has an outer end face 63 and an inner end face 64 which runs parallel to an outer side 66 of the collar 43 of the support part 44.
  • the actuating element 58 in its function as an adjusting nut is part of a locking device 67, which is formed with locking teeth 68, which are attached to the inner end face 64, which is opposite the collar 43, and which are in engagement with a counter-toothing 69, which is located on the Outside 66 of the federal government 43 is located.
  • the actuating element is axially secured by an axial securing element 71 engaging in the wall 21 in the form of a snap ring.
  • a rotary mount 72 is attached, via which the actuating element 58 can be coupled and rotated with a tool, which is no longer shown.
  • the rotary seat 72 is formed in the first embodiment in the form of recesses; however, it can alternatively be represented with protruding approaches.
  • the latching device 67 which works in the manner of a spur tooth coupling, is combined with its main components, actuating element 58, support part 44 and drag spring 36 to form a functional unit.
  • This axial displacement of the end edge 61 leads, based on the adjusting member 19, to a specifically changeable change in the position of the shift lever 62 acting as a starting quantity release lever and thus to a decoupled adjustment of the shift lever 62 on the one hand to the linkage of the control linkage, which takes place via the shoulder 22 of the adjusting member 19, and on the other hand to the articulation of the flyweights 14, which is carried out via the connecting pin 18 mounted in the adjusting member 19.
  • latching device 67 which works as a spur tooth coupling
  • it can alternatively also be designed with other toothing forms, for example as external serration.
  • an additional towing member 73 (shown in broken lines in FIG. 2) is inserted in the adjusting member 19.
  • a first spring abutment 74 is arranged opposite one another and each in the form of a shoulder, and a second spring abutment 76 is attached to the pressure piece 34 and, alternatively to the stop pin 53, a second spring abutment 76, between which the additional trailing spring 73, also like the trailing spring 36, is designed as a helical compression spring , is used.
  • the guidance of the additional drag spring 73 via the two spring abutments 74, 76 is shown as an example for the pressure piece 34 as an alternative to the attachment-shaped configuration in the form of a recess 77, which is cylindrical in the second exemplary embodiment.
  • This configuration can simultaneously be transferred to the second spring abutment 76 of the support part 44.

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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)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Fliehkraftdrehzahlregler nach der Gattung des Anspruchs 1.The invention relates to a centrifugal governor according to the preamble of claim 1.

Es sind Fliehkraftdrehzahlregler bekannt (CH-PS 319 357), bei denen die Übertragung der Regelbewegungen von den Fliehgewichten auf das Fördermengenverstellorgan durch eine Reglermuffe erfolgt, deren Wirklänge durch das Einschrauben in ein Gewinde änderbar ist.Centrifugal speed regulators are known (CH-PS 319 357), in which the transmission of the control movements from the centrifugal weights to the delivery rate adjustment element is carried out by a regulator sleeve, the effective length of which can be changed by screwing into a thread.

Dieser Fliehkraftdrehzahlregler enthält noch die Zusatzfunktion, einen Schalthebel in der Art eines Startmengenausrückhebels zu betätigen; gewöhnlicherweise wird dessen Position durch die zuvor ausgeführte Einstellung, die einer exakten Lagezuordnung zwischen Mengenverstellorgan und Fliehgewichten dient, mit verstellt und damit dessen gewünschte Lage verändert, so daß die dem Startmengenausrückhebel zugedachte Funktion beeinträchtigt oder gar unzureichend wird.This centrifugal speed governor also contains the additional function of actuating a shift lever in the manner of a starting quantity release lever; Usually its position is adjusted by the previously performed setting, which serves for an exact position assignment between the quantity adjusting element and the flyweights, and thus changes its desired position, so that the function intended for the start quantity release lever is impaired or even insufficient.

Des weiteren ist die Position des Schalthebels von Bauteilen des Fliehkraftdrehzahlreglers beeinflußt, die in ihrer Kombination eine Toleranzkette bilden, so daß die Summentoleranz einen großen Nachstellbereich für den Schalthebel ergibt.Furthermore, the position of the shift lever is influenced by components of the centrifugal speed controller, which in their combination form a tolerance chain, so that the total tolerance results in a large adjustment range for the shift lever.

Die Justierung des Schalthebels wird gewöhnlicherweise durch Nachbiegen des Schalthebels vorgenommen, wobei wegen des großen Nachstellbereichs der Schalthebel brechen kann oder zumindest anreißt, wodurch die Funktion des Schalthebels während des Betriebs des Fliehkraftdrehzahlreglers ohne Vorankündigung verlorengehen kann.The adjustment of the gearshift lever is usually carried out by bending the gearshift lever, the gearshift lever being able to break or at least crack due to the large adjustment range, as a result of which the function of the gearshift lever can be lost without prior notice during operation of the centrifugal speed controller.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Fliehkraftdrehzahlregler mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß die vorstehenden Nachteile vermieden werden.The centrifugal speed governor according to the invention with the characterizing features of claim 1 has the advantage that the above disadvantages are avoided.

Dazu weist der Fliehkraftdrehzahlregler eine Rastvorrichtung auf, mit der die Einstellung der Anlenkstellung des als Startmengenausrückhebel arbeitenden Schalthebels feinfühlig und damit feintolerant erfolgen kann. Die dabei erzielte Einstellung ist durch die Vorspannkraft einer Schleppfeder, in Verbindung mit dem selbstsichernden Formschluß der Verzahnung der Rastvorrichtung sicherstellt.For this purpose, the centrifugal speed governor has a locking device with which the adjustment of the articulation position of the shift lever operating as a starting quantity release lever can be carried out sensitively and thus with fine tolerance. The setting achieved in this way is ensured by the pretensioning force of a trailing spring in connection with the self-locking positive engagement of the toothing of the latching device.

Diese Einstellung beeinflußt nur die Position des Schalthebels und ermöglicht eine genaue Auslösung der Startmenge bei einer vorbestimmten Drehzahl.This setting only affects the position of the shift lever and enables the starting quantity to be triggered precisely at a predetermined speed.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Fliehkraftdrehzahlreglers möglich.The measures listed in the subclaims allow advantageous developments and improvements of the centrifugal speed controller specified in claim 1.

So weist das Einstellglied gemäß Anspruch 2 einen axial beweglichen Anschlagbolzen auf, bei dem die als Endkante bezeichnete Stirnfläche, von der die Ansteuerung des Schalthebels ausgeht, nicht auf einem körpergebundenen Maß der Kontur des Verstellgliedes basiert, sondern mittelbar durch ein seperates Bauteil, den Anschlagbolzen, gebildet wird und damit eine individuelle Einstellung gegeben ist. Dabei sind direkt am Anschlagbolzen Führungsflächen angebracht, die bei der Einstellung des Schalthebels mittels des Anschlagbolzens dessen Drehlage im Abstützteil festlegen.The adjusting member according to claim 2 has an axially movable stop pin, in which the end face referred to as the end edge, from which the actuation of the shift lever is based, is not based on a body-related measure of the contour of the adjusting member, but indirectly by means of a separate component, the stop pin, is formed and thus an individual attitude is given. In this case, guide surfaces are attached directly to the stop pin, which, when the shift lever is adjusted, fix its rotational position in the support part by means of the stop pin.

Besonders vorteilhaft ist, zum einstellbaren Verändern der Position des Anschlagbolzens zur Lageeinstellung des Schalthebels eine Rastvorrichtung nach den kennzeichnenden Merkmalen des Anspruchs 7 zu verwenden, bei der die vorteilhafte Funktion über ein Kombination aus Formschluß und Kraftschluß und damit eine gute Lage- und Losdrehsicherung erreicht wird.It is particularly advantageous to use a locking device according to the characterizing features of claim 7 for the adjustable change of the position of the stop bolt for adjusting the position of the shift lever, in which the advantageous function is achieved by a combination of positive and non-positive locking and thus a good position and anti-rotation lock.

Gemäß Anspruch 10 ist zwischen Druckstück und Abstützteil bzw. Anschlagbolzen, eine Zusatzschleppfeder eingefügt, womit ein geringerer Axialhub des Verstellgliedes und ein vorteilhafte Veränderung der resultierenden Federkonstante möglich wird.According to claim 10, an additional drag spring is inserted between the pressure piece and the support part or stop bolt, which enables a smaller axial stroke of the adjusting member and an advantageous change in the resulting spring constant.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung anhand mehrerer Figuren dargestellt und in der nachfolgenden Beschreibung näher erläutert.Two exemplary embodiments of the invention are shown in the drawing with reference to several figures and are explained in more detail in the description below.

Es zeigen Figur 1 in vereinfachter Darstellung einen Längsschnitt durch den erfindungsgemäßen Fliehkraftdrehzahlregler, Figur 2 einen Teilschnitt des ersten Ausführungsbeispiels mit dem Stellelement des Fliehkraftdrehzahlreglers als Teil einer Rastvorrichtung, die partiell in Figur 2a vergrößert dargestellt ist und Figur 3 ein alternatives Federwiderlager für eine Zusatzschleppfeder des zweiten Ausführungsbeispiels.1 shows a simplified representation of a longitudinal section through the centrifugal force governor according to the invention, FIG. 2 shows a partial section of the first exemplary embodiment with the actuating element of FIG Centrifugal speed controller as part of a locking device, which is partially shown enlarged in Figure 2a and Figure 3 shows an alternative spring abutment for an additional drag spring of the second embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Der in Figur 1 vereinfacht dargestellte Fliehkraftdrehzahlregler trägt in einem Gehäuse 11 einen auf einer Antriebswelle 12 einer an sich bekannten und im übrigen nur teilweise dargestellten Einspritzpumpe 15 für Brennkraftmaschinen befestigten Fliehgewichtsregler 13, dessen Fliehgewichte 14 in bekannter Weise unter der Wirkung der Fliehkraft entgegen der Kraft von Regelfedern 16 ihre Regelbewegung über Winkelhebel 17 und Verbindungsbolzen 18 auf ein als Reglermuffe ausgebildetes Verstellglied 19 übertragen.The centrifugal force governor shown in simplified form in FIG. 1 carries, in a housing 11, a centrifugal weight regulator 13 fastened on a drive shaft 12 of a known and otherwise only partially illustrated injection pump 15 for internal combustion engines, the centrifugal weights 14 of which, in a known manner, under the effect of the centrifugal force against the force of Control springs 16 transmit their control movement via angled lever 17 and connecting bolts 18 to an adjusting member 19 designed as a control sleeve.

Mittels der Außenkontur ihrer Wandung 21, die unter anderem eine Schulter 22 und ein Stirnfläche 23 bildet, ist das Verstellglied 19 mit einem Reglergestänge 24 verbunden, das bekannterweise einen der Drehzahlvorgabe dienenden, innerhalb eines begrenzten Winkelbereiches schwenkbaren Verstellhebels 25 aufweist, dessen Bewegungen in bekannter Weise auf eine Regelstange 31, die ein Verstellorgan 32 positioniert, übertragen werden.By means of the outer contour of its wall 21, which forms, among other things, a shoulder 22 and an end face 23, the adjusting member 19 is connected to a control linkage 24, which is known to have an adjusting lever 25 which serves to set the rotational speed and can be swiveled within a limited angular range, the movements of which are known to a control rod 31, which positions an adjusting member 32, are transferred.

Der Weg der Regelstange 31 ist dabei in Richtung zunehmender Fördermenge durch einen Anschlag 33, der mit einem Gegenanschlag 35 zusammenwirkt, begrenzt. Sobald das Reglergestänge 24 bestrebt ist, die Regelstange 31 über die durch den Anschlag 33 begrenzte Lage hinauszuschieben, wird die überschüssige Bewegung des Reglergestänges 24 mittelbar auf das Verstellglied 19 übertragen. Damit wird eine ebenfalls im Verstellglied 19 angeordnetes Schleppfeder 36 überdrückt und somit das Reglergestänge 24 vor Überlastung geschützt.The path of the control rod 31 is limited in the direction of increasing flow rate by a stop 33 which interacts with a counter stop 35. As soon as the control linkage 24 strives to push the control rod 31 beyond the position delimited by the stop 33, the excess movement of the control linkage 24 is transmitted indirectly to the adjusting member 19. A trailing spring 36, which is also arranged in the adjusting member 19, is thus overpressed and the regulator linkage 24 is thus protected against overload.

Das erste Ausführungsbeispiel weist, wie in Figur 2 und partiell in Figur 2a vergrößert gezeigt, in der Wandung 21 eine Ausnehmung 37 auf, durch die der Verbindungsbolzen 18 mit Bewegungsspiel hindurchgeführt ist und er geringfügige seitliche Ausweichbewegungen vollziehen kann. Das Druckstück 34 ist innerhalb einer durch die Wandung 21 begrenzte Längsbohrung 38 des Verstellgliedes 19 angeordnet und über eine außenliegende Stirnseite 39 an den Verbindungsbolzen 18 und damit mittelbar an die Fliehgewichte 14 angekoppelt. Mit einer innenliegenden Stirnseite 41 liegt das Druckstück 34 an der Schleppfeder 36, die als Schraubendruckfeder ausgebildet ist.The first exemplary embodiment has, as shown in FIG. 2 and partially enlarged in FIG. 2a, a recess 37 in the wall 21 through which the connecting bolt 18 is guided with play and can perform slight lateral evasive movements. The pressure piece 34 is arranged within a longitudinal bore 38 of the adjusting member 19 delimited by the wall 21 and is coupled via an external end face 39 to the connecting bolt 18 and thus indirectly to the flyweights 14. With an inner end face 41, the pressure piece 34 lies on the drag spring 36, which is designed as a helical compression spring.

Die Schleppfeder 36 stützt sich auf einer Innenseite 42 eines Bundes 43 eines Abstützteils 44 ab, wobei das Abstützteil 44 aus einem Grundkörper 46, der in die Schleppfeder 36 hineinragt und dem den Grundkörper 46 radial erweiternden Bund 43 besteht.The trailing spring 36 is supported on an inner side 42 of a collar 43 of a supporting part 44, the supporting part 44 consisting of a basic body 46 which projects into the trailing spring 36 and the collar 43 which radially widens the basic body 46.

Der Bund 43 beinhaltet, wiederum in radialer Erweiterung, eine Nase 47, die in eine Ausnehmung 48 der Wandung 21 ragt und hierdurch eine Verdrehsicherung und entsprechend der Vorspannkraft der Schleppfeder 36 eine Axialsicherung des Abstützteils 44, bezogen auf dessen Lage im Verstellglied 19 bildet. In axialer Erstreckung ist die Ausnehmung 48 weiter als das Axialmaß der Nase 47, so daß das Abstützeil 44 in der Lage ist, entgegen der Stellkraft der Schleppfeder 36 eine geringfügige Ausgleichsbewegung zu vollziehen.The collar 43 includes, again in a radial extension, a nose 47 which protrudes into a recess 48 in the wall 21 and thereby forms an anti-rotation device and, in accordance with the pretensioning force of the trailing spring 36, an axial securing device for the supporting part 44, based on its position in the adjusting member 19. In the axial extent, the recess 48 is wider than the axial dimension of the nose 47, so that the support part 44 is able to perform a slight compensating movement against the actuating force of the trailing spring 36.

Im Querschnitt ist das Abstützteil 44 innerhalb seines Grundkörpers 46 in Abweichung zur Kreisform mit zwei ebenen, sich einander parallel gegenüberliegenden Abschnitten, die als Führungsflächen dienen, versehen. Diese Abschnitte führen mit Bewegungsspiel einen Kopfteil 52 eines Anschlagbolzens 53, der mit entsprechender Formgebung und Führungsflächen 51 in dem Grundkörper 46 des Abstützteils 44 eingepaßt ist.In cross-section, the support part 44 is provided within its base body 46 in deviation from the circular shape with two flat, mutually parallel sections which serve as guide surfaces. These sections lead with movement play a head part 52 of a stop bolt 53, which is fitted with a corresponding shape and guide surfaces 51 in the base body 46 of the support part 44.

Neben dem Kopfteil 52 beinhaltet der Anschlagbolzen 53 noch einen im Querschnitt kreisförmigen Schaft 54, der ein Außengewinde 56 trägt, das in Eingriff steht mit dem Innengewinde 57 eines den Schaft 54 axial partiell umfassenden Stellelements 58.In addition to the head part 52, the stop pin 53 also includes a shaft 54 which is circular in cross section and which carries an external thread 56 which is in engagement with the internal thread 57 of an adjusting element 58 which partially surrounds the shaft 54.

Auf der dem Kopfteil 52 abgewandten Seite endet der Schaft 54 in einer die Stirnfläche 23 des Verstellgliedes 19 überragenden Endkante 61, die eine linsenkopfförmige Kontur aufweist. Von der Endkante 61 wird in bekannter Weise, wie zum Beispiel in der CH-PS 319 357 gezeigt, ein nur noch angedeutet gezeichneter federbelasteter Schalthebel 62 angelenkt, der als ein Startmengenausrückhebel die Positionierung der Regelstange 31 zwischen den Stellungen Volllastmenge und Startmenge steuert über den von ihm positionierten Anschlag 33 und dem mit dem Mengenverstellorgan 32 verbundenen Gegenanschlag 35.On the side facing away from the head part 52, the shaft 54 ends in an end edge 61 which projects beyond the end face 23 of the adjusting member 19 and which has a contour shaped like a lens head. From the end edge 61 is articulated in a known manner, as shown, for example, in CH-PS 319 357, a spring-loaded shift lever 62 which is only indicated and which, as a start quantity release lever, controls the positioning of the control rod 31 between the positions of full load quantity and start quantity via the of the stop 33 positioned thereon and the counter stop 35 connected to the quantity adjusting element 32.

Das Stellelement 58 hat die Grundform eines schmalen Hohlzylinders, der in der Längsbohrung 38 des Verstellgliedes 19 gelagert ist und eine außenliegende Stirnfläche 63, als auch eine innenliegende Stirnfläche 64, die parallel zu einer Außenseite 66 des Bundes 43 des Abstützteils 44 verläuft, aufweist.The actuating element 58 has the basic shape of a narrow hollow cylinder which is mounted in the longitudinal bore 38 of the adjusting member 19 and has an outer end face 63 and an inner end face 64 which runs parallel to an outer side 66 of the collar 43 of the support part 44.

Das Stellelement 58 in seiner Funktion als Stellmutter ist Teil einer Rastvorrichtung 67, die gebildet ist mit Rastzähnen 68, die auf der innenliegenden Stirnfläche 64, die dem Bund 43 gegenüberliegt, angebracht sind und die in Eingriff stehen mit einer Gegenverzahnung 69, die sich an der Außenseite 66 des Bundes 43 befindet.The actuating element 58 in its function as an adjusting nut is part of a locking device 67, which is formed with locking teeth 68, which are attached to the inner end face 64, which is opposite the collar 43, and which are in engagement with a counter-toothing 69, which is located on the Outside 66 of the federal government 43 is located.

Um den Kraftschluß zwischen Gegenverzahnung 69 und Rastzähne 68 zu erhalten, der über die Schleppfeder 36 vermittelt wird, ist das Stellelement durch ein in der Wandung 21 eingreifendes Axialsicherungselement 71 in Form eines Sprengrings axial gesichert.In order to maintain the frictional connection between counter teeth 69 and locking teeth 68, which is mediated by the drag spring 36, the actuating element is axially secured by an axial securing element 71 engaging in the wall 21 in the form of a snap ring.

An der außenliegenden Stirnfläche 63 des Stellelements 58 ist eine Drehaufnahme 72 angebracht, über die das Stellelement 58 mit einem nicht mehr dargestellten Werkzeug gekoppelt und gedreht werden kann. Die Drehaufnahme 72 ist beim ersten Ausführungsbeispiel in Form von Ausnehmungen gebildet; sie kann aber auch alternativ mit hervorstehenden Ansätzen dargestellt werden.On the outer end face 63 of the actuating element 58, a rotary mount 72 is attached, via which the actuating element 58 can be coupled and rotated with a tool, which is no longer shown. The rotary seat 72 is formed in the first embodiment in the form of recesses; however, it can alternatively be represented with protruding approaches.

Mit den beschriebenen Elementen ist die in der Art einer Stirnzahnkupplung arbeitende Rastvorrichtung 67 mit ihren Hauptbestandteilen Stellelement 58, Abstützteil 44 und Schleppfeder 36 zu einer funktionsfähigen Einheit zusammengefügt.With the elements described, the latching device 67, which works in the manner of a spur tooth coupling, is combined with its main components, actuating element 58, support part 44 and drag spring 36 to form a functional unit.

Unter diesen Voraussetzungen ergibt eine mit dem Einstellwerkzeug in das Stellelement 58 eingebrachte Drehbewegung eine durch die Raststufen der Rastvorrichtung 67 selbstsichernde Axialbewegung des Anschlagbolzens 53 und seiner Endkante 61.Under these conditions, a rotary movement introduced into the adjusting element 58 with the adjusting tool results in an axial movement of the stop bolt 53 and its end edge 61 that is self-locking due to the latching stages of the latching device 67.

Diese Axialverlagerung der Endkante 61 führt, bezogen auf das Verstellglied 19, zu einer gezielt veränderbaren Lageänderung des als Startmengenausrückhebels wirkenden Schalthebels 62 und damit zu einer entkoppelten Justierung des Schalthebels 62 einerseits zu der Anlenkung des Reglergestänges, die über die Schulter 22 des Verstellgliedes 19 erfolgt, und andererseits zu der Anlenkung der Fliehgewichte 14, die über den in dem Verstellglied 19 gelagerten Verbindungsbolzen 18 vorgenommen wird.This axial displacement of the end edge 61 leads, based on the adjusting member 19, to a specifically changeable change in the position of the shift lever 62 acting as a starting quantity release lever and thus to a decoupled adjustment of the shift lever 62 on the one hand to the linkage of the control linkage, which takes place via the shoulder 22 of the adjusting member 19, and on the other hand to the articulation of the flyweights 14, which is carried out via the connecting pin 18 mounted in the adjusting member 19.

In Abwandlung der als eine in der Art einer Stirnzahnkupplung arbeitenden Rastvorrichtung 67 kann diese alternativ auch mit anderen Verzahnungsformen, beispielsweise als außenliegende Kerbverzahnung ausgeführt sein.In a modification of the latching device 67, which works as a spur tooth coupling, it can alternatively also be designed with other toothing forms, for example as external serration.

In einem zweiten Ausführungsbeispiel ist in dem Verstellglied 19 ein Zusatzschleppglied 73 (in Figur 2 strichpunktiert gezeichnet) eingefügt. Dazu sind, einander gegenüberliegend und jeweils absatzförmig ausgebildet, an dem Druckstück 34 ein erstes Federwiderlager 74 und an dem Abstützteil 44 bzw. alternativ am Anschlagbolzen 53, ein zweites Federwiderlager 76 angebracht, zwischen denen die Zusatzschleppfeder 73, ebenfalls wie die Schleppfeder 36 als Schraubendruckfeder ausgebildet, eingesetzt ist.In a second exemplary embodiment, an additional towing member 73 (shown in broken lines in FIG. 2) is inserted in the adjusting member 19. For this purpose, a first spring abutment 74 is arranged opposite one another and each in the form of a shoulder, and a second spring abutment 76 is attached to the pressure piece 34 and, alternatively to the stop pin 53, a second spring abutment 76, between which the additional trailing spring 73, also like the trailing spring 36, is designed as a helical compression spring , is used.

Dadurch wird im Zusammenwirken mit der Schleppfeder 36 eine resultierende veränderte Federkonstante und damit über eine verringerte Auslenkung des Verstellgliedes 19 das Regelverhalten des Fliehkraftdrehzahlreglers vorteilhaft beeinflußt.As a result, in cooperation with the trailing spring 36, a resulting changed spring constant and thus a reduced deflection of the adjusting member 19 advantageously influence the control behavior of the centrifugal speed controller.

In Figur 3 ist die Führung der Zusatzschleppfeder 73 über die beiden Federwiderlager 74, 76 alternativ zu der ansatzförmigen Ausgestaltung in der Form einer Ausnehmung 77, die beim zweiten Ausführungsbeispiel zylindrisch ausgestaltet ist, beispielhaft für das Druckstück 34 gezeigt. Diese Ausgestaltung läßt sich gleichzeitig auf das zweite Federwiderlager 76 des Abstützteils 44 übertragen.In FIG. 3, the guidance of the additional drag spring 73 via the two spring abutments 74, 76 is shown as an example for the pressure piece 34 as an alternative to the attachment-shaped configuration in the form of a recess 77, which is cylindrical in the second exemplary embodiment. This configuration can simultaneously be transferred to the second spring abutment 76 of the support part 44.

Claims (10)

  1. Centrifugal speed governor for fuel-injection internal-combustion engines, the flyweights (14) of which adjust as a function of speed, counter to the force of at least one regulating spring (16), an adjusting member (19) which contains at least one drag spring (36) and serves as a governor bushing and which actuates a feed-quantity adjusting member (32) of an injection pump (15) via governor linkage (24) and in which is introduced a stop pin (53) couplable to a shift lever (62) as a result of its axial positioning, the travel of the feed-quantity adjusting member (32) being limited via at least one stop (33), and the stop (33), which limits the full-load quantity, being moved by means of the shift lever (62), during the starting phase of the internal-combustion engine, out of the travel of a counterstop (35) connected to the feed-quantity adjusting member (32), and the feed-quantity adjusting member (32) thus being displaceable into a position, in which a starting feed quantity exceeding the full-load feed quantity is metered, characterised in that the axial positioning of the stop pin (53) is changed by a catch device (67) which is in engagement, under the force effect of the drag spring (36), by means of catch teeth (68) with a supporting part (44) arranged in the adjusting member (19) in a manner safeguarded against rotation.
  2. Speed governor according to Claim 1, in which the adjusting member (19) on the one hand is coupled, via a shoulder (22) on its outer contour, to the governor linkage (24) and indirectly by means of an end edge (61) to the shift lever (62) and on the other hand supports a connecting bolt (18) which forms the connection with the flyweights (14), characterised in that the stop pin (53) is axially moveable within a longitudinal bore (38) in the adjusting member (19) and is positively guided in the supporting part (44) by means of circumferential guide faces (51).
  3. Speed governor according to Claim 2, characterised in that the supporting part (44) has a collar (43) which a radially projecting nose (47) which, to form a safeguard against rotation, engages into a recess (48) of the wall (41) of the adjusting member (19).
  4. Speed governor according to Claim 2 or 3, characterised in that the axial movement of the stop pin (53) takes place via an adjusting element (58) which is mounted in the longitudinal bore (38) of the adjusting member (19) and which bears against an axial-securing element (71).
  5. Speed governor according to Claim 4, characterised in that the adjusting element (58) has the catch teeth (68) on its end face confronting the supporting part (44).
  6. Speed governor according to Claim 5, characterised in that the supporting part (44) has, on the collar (43), a counter-toothing (69) engaging into the catch teeth (68).
  7. Speed governor according to Claim 6, characterised in that the catch teeth (68) forming the catch device (67) and the counter-toothing (69) are designed in the manner of a spur-tooth coupling.
  8. Speed governor according to Claim 6, characterised in that the catch device (67) is designed in the manner of an external serration.
  9. Speed governor according to one of the preceding claims, characterised in that the drag spring (36) is clamped between the collar of the supporting part (44) and a thrust piece (34) supported on the connecting bolt (18).
  10. Speed governor according to Claim 9, characterised in that an additional drag spring (73) is clamped between the thrust piece (34) and supporting part (44) or stop pin (53).
EP90117627A 1989-10-31 1990-09-13 Centrifugal governor for internal combustion engines Expired - Lifetime EP0425801B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936184 1989-10-31
DE3936184A DE3936184A1 (en) 1989-10-31 1989-10-31 CENTRIFUGAL SPEED REGULATOR FOR INJECTION ENGINE

Publications (2)

Publication Number Publication Date
EP0425801A1 EP0425801A1 (en) 1991-05-08
EP0425801B1 true EP0425801B1 (en) 1993-12-01

Family

ID=6392562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90117627A Expired - Lifetime EP0425801B1 (en) 1989-10-31 1990-09-13 Centrifugal governor for internal combustion engines

Country Status (3)

Country Link
EP (1) EP0425801B1 (en)
JP (1) JPH03156131A (en)
DE (2) DE3936184A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2626524C1 (en) * 2016-02-09 2017-07-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Вятский государственный университет" Diesel control system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH319357A (en) * 1953-02-14 1957-02-15 Bosch Gmbh Robert Fuel injection system for internal combustion engines
AT288088B (en) * 1967-11-14 1971-02-25 Bosch Gmbh Robert Centrifugal governor for speed control of diesel engines
DE2308260C2 (en) * 1973-02-20 1983-11-24 Robert Bosch Gmbh, 7000 Stuttgart Centrifugal governor for internal combustion engines
DE2334729B2 (en) * 1973-07-07 1978-04-06 Robert Bosch Gmbh, 7000 Stuttgart Centrifugal governor for internal combustion engines
DE3301416A1 (en) * 1983-01-18 1984-07-19 Robert Bosch Gmbh, 7000 Stuttgart SPEED CONTROLLER OF A FUEL INJECTION PUMP

Also Published As

Publication number Publication date
DE3936184A1 (en) 1991-05-02
EP0425801A1 (en) 1991-05-08
JPH03156131A (en) 1991-07-04
DE59003688D1 (en) 1994-01-13

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