EP0243874A2 - Control device for the fuel delivery and injection timing of an internal-combustion engine - Google Patents

Control device for the fuel delivery and injection timing of an internal-combustion engine Download PDF

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Publication number
EP0243874A2
EP0243874A2 EP87105933A EP87105933A EP0243874A2 EP 0243874 A2 EP0243874 A2 EP 0243874A2 EP 87105933 A EP87105933 A EP 87105933A EP 87105933 A EP87105933 A EP 87105933A EP 0243874 A2 EP0243874 A2 EP 0243874A2
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EP
European Patent Office
Prior art keywords
support body
adjusting device
plunger
shaft
extension
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
EP87105933A
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German (de)
French (fr)
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EP0243874B1 (en
EP0243874A3 (en
Inventor
Joachim Altdorf
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT87105933T priority Critical patent/ATE63975T1/en
Publication of EP0243874A2 publication Critical patent/EP0243874A2/en
Publication of EP0243874A3 publication Critical patent/EP0243874A3/en
Application granted granted Critical
Publication of EP0243874B1 publication Critical patent/EP0243874B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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

Definitions

  • the invention relates to an adjusting device according to the preamble of claim 1.
  • a delivery start adjustment device for an in-line injection pump of an internal combustion engine is known, which is integrated into the housing of the in-line injection pump.
  • a tappet which is arranged between the tappet rod and the camshaft integrated in the in-line injection pump, is moved tangentially to the camshaft by a device which can be adjusted via two eccentrically mounted adjusting pins.
  • An additional overall height of the in-line injection pump is required to accommodate the adjustment device spatially:
  • the eccentrically mounted adjustment pins interacting with the adjustment device must be manufactured in an identical manner and must be exactly aligned with each other to ensure trouble-free operation to be provided, which transmit a rotary movement exerted on one adjusting pin to the second adjusting pin. It is also necessary to provide suitable bearings for the adjustment pins in the housing of the in-line injection pump.
  • the object of the invention is to provide an adjusting device with which a plunger, which can be moved radially to the shaft by a cam arranged on a shaft, can be displaced tangentially to the shaft, the adjusting device being mechanically simple and space-saving and easy in an internal combustion engine can be installed.
  • the adjusting device has a support body which is axially displaceably mounted in a fixed housing at an angle to the radial direction of movement of the plunger caused by the cam and wherein a bore made in the support body is in turn arranged axially parallel to the direction of movement of the plunger and the Tappet includes a mechanically simple and easy and space-saving adjustment device is provided.
  • the bore in the housing for example of an internal combustion engine, which is necessary anyway for guiding the tappet, can already be produced during the housing production without additional effort in accordance with the requirements given by the installation of the adjusting device according to the invention.
  • the adjustment device which essentially consists of the supporting body, likewise does not have any special manufacturing requirements and can be manufactured in a simple manner as a normal series part.
  • an extension is attached to the support body, which is advantageously arranged in an axial extension of the support body on the shaft side and covers the shaft and the Nockeri'tangential on one side in a partial section without contact.
  • This extension is advantageously made in one piece with the support body.
  • the extension has a recess in the end region pointing away from the support body, into which an actuating shaft arranged transversely to the extension engages with a nose, the nose in the region interacting with the recess having a surface contour that has a play-free contact surface in a predetermined range of rotation to the recess.
  • This design provides a simple device for the axial adjustment of one or more supporting bodies.
  • the actuating shaft is mounted axially parallel to the camshaft in suitable bearing devices.
  • the already existing bearing blocks of the camshaft are suitable for this purpose, into which only an additional hole has to be drilled.
  • the actuating shaft in turn is now turned via a corresponding lever on which an adjusting piston is articulated.
  • the adjusting piston can be adjusted, for example, when using the adjusting device as a delivery start adjustment device for an injection pump element of an internal combustion engine by the known adaptation groups such as load-dependent delivery start or boost pressure-dependent delivery start adjustment group. It can be on commercially available series parts, as in used for example in distributor injection pumps. Furthermore, it is possible according to the invention to control the control of the adjusting piston from central control electronics. These control options mentioned above can be transferred analogously when the adjustment device is used to change the control times of the valve train of an internal combustion engine.
  • the adjusting device according to the invention can be used in particular in the case of individual injection pump elements which are inserted directly into the internal combustion engine housing.
  • the adjustment device is also intended to be installed in in-line injection pumps.
  • both components are secured by pins which engage in corresponding grooves in the housing or the support body.
  • the adjustment device according to the invention can be used both for adjusting the start of delivery of the injection pump elements of an internal combustion engine and for changing the valve timing.
  • both the intake and exhaust valves are adjusted alone or together using appropriate adjustment devices.
  • a central shaft 2 serving as a camshaft is arranged in the housing 1 of an internal combustion engine.
  • cams 3 arranged one another actuates the gas exchange valves and the injection pump elements 28 of the internal combustion engine.
  • An injection pump element 28 is fastened on a flange 4 of the housing 1.
  • the flange 4 is arranged at right angles to a connecting line 5 to the camshaft. 2.
  • An opening 6 is machined into the flange 4, through which a push rod 7 of an injection pump element 28 is guided.
  • the push rod 7 ends on the camshaft side in a plate 8, on which a spring 9 pointing toward the injection pump element 28 is supported.
  • a push rod 10 is arranged in the axial extension of the connecting line 5.
  • the plunger 10 has a surface 11 on the push rod side, which is arranged parallel to the plate 8 and on which the plate 8 is supported.
  • the distance a and b between the outer diameter of the plate 8 and the inner diameter of an annular extension 12 of the surface 11 is such that it does not become zero over the entire tangential adjustment range of the plunger 10.
  • annular extension 12 a On the side of the surface 11 facing the camshaft 2 there is also an annular extension 12 a.
  • annular extension 12 a two bores are machined axially parallel to the camshaft 2, into which a shaft 13 is inserted, on which an impeller 14 is mounted within the annular extension.
  • This impeller 14, which is aligned axially parallel to the camshaft 2 runs on the radial circumference of the camshaft 2 or the cam 3 and moves the tappet 10 according to the surface contour of the camshaft 2 or the cam 3 and accordingly the tappet rod 7 along the connecting line 5.
  • the plunger 10 is guided in a support body 15, which is arranged in a recess 16 of the housing 1.
  • the direction of movement of the support body 15, which can be represented by its center line 17, is inclined by an angle ⁇ to the connecting line 5.
  • a bore 18 which is parallel to the connecting line 5 and which corresponds to the outer diameter of the plunger 10 is machined into the support body 15.
  • the support body 15 also has a radial bore 19 into which a pin 20 is pressed.
  • the pin 20 engages with its end protruding from the bore 19 into a groove 21 which is machined axially parallel to the center line 17 in the recess 16 of the housing 1. With this device, the support body 15 is secured against rotation relative to the housing 1 and can only be moved in the axial direction along the center line 17.
  • the support body 15 is preferably made as a cylindrical component: Instead of the anti-rotation form by means of pin 20 and groove 21, it is also possible according to the invention to use the support body 15, which is manufactured as a cylindrical component, by means of sliding webs 30, which are located on both sides of a cam 3 on the base circle of the camshaft Support 2 to secure against twisting. If the outer contour of the support body deviates from a circular shape - for example in the case of a rectangular outer contour - then rotation lock can be dispensed with, since the support body is then guided in a correspondingly designed recess 16 in a rotationally secure manner.
  • a radial blind hole 2 is machined in the area of the surface 11, into which a pin 23 is also inserted.
  • the pin 23 protrudes with its end protruding from the blind hole 22 into a groove 24, which axis 15 in the recess 16 of the support body is incorporated parallel to the connecting line 5.
  • the plunger 10 is thus also secured against rotation with respect to the supporting body 15 and with respect to the housing 1.
  • the support body 15 is moved axially in the direction of the center line 17 by an actuating shaft 25 which engages with a nose 26 in a recess 27 which is let into an extension 28 of the support body 15.
  • the actuating shaft 25 is arranged axially parallel to the camshaft 2 and is provided with at least one lever, by which the actuating shaft 25 can be rotated through predetermined angular ranges. This rotation is carried out by an adjusting piston, not shown, which can be adjusted hydraulically, for example, by the controllable fuel pressure.
  • the support body 15 is displaced in the direction of the flange 4. Characterized in that the support body is arranged at an angle to the plunger 10 in the housing 1, the plunger 10 is displaced so that the distance b decreases and the distance a increases. If, at the same time, the camshaft 2 rotates, for example, in the direction of the arrow shown, such an adjustment of the tappet 10 means a shift in the start of delivery in the "early” direction. A movement of the actuating shaft 25 directed against the arrow would accordingly cause the start of delivery to be shifted towards the "late” direction if the camshaft rotation direction remains unchanged.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

An adjustment mechanism for changing the timing of fluid flow to or from the combustion chamber of an internal combustion engine wherein an axially displaceable support body 15 displaces a plunger 10 tangentially relative to a camshaft 2 which reciprocates the plunger 10.

Description

Die Erfindung betrifft eine Verstelleinrichtung gemäß Oberbegriff des Anspruchs 1.The invention relates to an adjusting device according to the preamble of claim 1.

Aus der GB-PS 1 328 096 ist eine Förderbeginnverstelleinrichtung für eine Reiheneinspritzpumpe einer Brennkraftmachine bekannt, die in das Gehäuse der Reiheneinspritzpumpe integriert ist. Dabei wird ein Stößel, der zwischen Stößelstange und in die Reiheneinspritzpumpe integrierte Nockenwelle angeordnet ist, von einer Vorrichtung, die über zwei exzentrisch gelagerte Verstellstifte verstellbar ist, zur Verstellung des Förderbeginns tangential zu der Nockenwelle bewegt. Dabei ist zur räumlichen Aufnahme der Verstellvorrichtung eine zusätzliche Bauhöhe der Reiheneinspritzpumpe erforderlich: Weiterhin müssen die mit der Verstelleinrichtung zusammenwirkenden exzentrisch gelagerten Verstellstifte vollkommen baugleich gefertigt werden und müssen zu einer störungsfreien Funktion genau zueinander ausgerichtet sein..Zudem ist es erforderlich, die Verstellstifte mit geeigneten Zwischenhebeln zu versehen, die eine auf einen Verstellstift ausgeübte Drehbewegung auf den zweiten Verstellstift übertragen. Es ist auch notwendig für die Verstellstifte geeignete Lagerungen in dem Gehäuse der Reiheneinspritzpumpe vorzusehen.From GB-PS 1 328 096 a delivery start adjustment device for an in-line injection pump of an internal combustion engine is known, which is integrated into the housing of the in-line injection pump. In this case, a tappet, which is arranged between the tappet rod and the camshaft integrated in the in-line injection pump, is moved tangentially to the camshaft by a device which can be adjusted via two eccentrically mounted adjusting pins. An additional overall height of the in-line injection pump is required to accommodate the adjustment device spatially: Furthermore, the eccentrically mounted adjustment pins interacting with the adjustment device must be manufactured in an identical manner and must be exactly aligned with each other to ensure trouble-free operation to be provided, which transmit a rotary movement exerted on one adjusting pin to the second adjusting pin. It is also necessary to provide suitable bearings for the adjustment pins in the housing of the in-line injection pump.

Aufgabe der Erfindung ist es, eine Verstelleinrichtung, mit der ein Stößel, der von einem auf einer Welle angeordneten Nocken radial zu der Welle bewegbar ist, tangential zu der Welle verschiebbar ist, bereitzustellen, wobei die Verstelleinrichtung mechanisch einfach aufgebaut ist sowie raumsparend und problemlos in eine Brennkraftmaschine einbaubar ist.The object of the invention is to provide an adjusting device with which a plunger, which can be moved radially to the shaft by a cam arranged on a shaft, can be displaced tangentially to the shaft, the adjusting device being mechanically simple and space-saving and easy in an internal combustion engine can be installed.

Diese Aufgabe wird durch die kennzeichenden Merkmale des Anspruchs 1 gelöst. Dadurch, daß die Verstelleinrichtung einen Tragkörper aufweist, der unter einem Winkel zu der von dem Nocken hervorgerufenen radialen Bewegungsrichtung des Stößels in einem ortsfesten Gehäuse axial verschiebbar gelagert ist und wobei eine in dem Tragkörper angebrachte Bohrung ihrerseits achsparallel zu der Bewegungsrichtung des Stößels angeordnet ist und den Stößel umfaßt, ist eine mechanisch einfach aufgebaute und problemlos sowie raumsparend einbaubare Verstelleinrichtung bereitgestellt. Die zur Führung des Stößels ohnehin notwendige Bohrung in dem Gehäuse beispielsweise einer Brennkraftmaschine kann schon während der Gehäuseproduktion ohne zusätzlichen Aufwand entsprechend den durch den Einbau der erfindungsgemäßen Verstelleinrichtung geändert gegebenen Erfordernissen gefertigt werden. Ebenso ist es ohne Schwierigkeiten möglich eine bereits fertige Brennkraftmaschine bei Bedarf nachträglich mit der entsprechenden Bohrung zu versehen, da die bereits vorhandene Bohrung nur unter dem entsprechenden Winkel aufgebohrt werden muß. Die im wesentlichen aus dem Tragkörper bestehende Verstelleinrichtung stellt ebenfalls keine besonderen fertigungstechnischen Anforderungen und kann in einfacher Wiese als normales Serienteil gefertigt werden.This object is achieved by the characterizing features of claim 1. Characterized in that the adjusting device has a support body which is axially displaceably mounted in a fixed housing at an angle to the radial direction of movement of the plunger caused by the cam and wherein a bore made in the support body is in turn arranged axially parallel to the direction of movement of the plunger and the Tappet includes a mechanically simple and easy and space-saving adjustment device is provided. The bore in the housing, for example of an internal combustion engine, which is necessary anyway for guiding the tappet, can already be produced during the housing production without additional effort in accordance with the requirements given by the installation of the adjusting device according to the invention. It is also possible without difficulty to retrofit an already finished internal combustion engine with the corresponding bore if necessary, since the already existing bore only has to be drilled out at the appropriate angle. The adjustment device, which essentially consists of the supporting body, likewise does not have any special manufacturing requirements and can be manufactured in a simple manner as a normal series part.

In Weiterbildung der Erfindung ist an den Tragkörper ein Fortsatz befestigt, der in vorteilhafter Weise in wellenseitiger axialer Verlängerung des Tragkörpers angeordnet ist und die Welle sowie den Nockeri'tangential einseitig in einem Teilabschnitt berührungsfrei überdeckt. Dieser Fortsatz ist vorteilhaft einstückig mit dem Tragkörper gefertigt.In a further development of the invention, an extension is attached to the support body, which is advantageously arranged in an axial extension of the support body on the shaft side and covers the shaft and the Nockeri'tangential on one side in a partial section without contact. This extension is advantageously made in one piece with the support body.

Der Fortsatz weist gemäß einer Weiterbildung in dem von dem Tragkörper wegweisenden Endbereich eine Ausnehmung auf, in die eine quer zu dem Fortsatz angeordnete Betätigungswelle mit einer Nase eingreift, wobei die Nase in dem mit der Ausnehmung zusammenwirkenden Bereich eine Oberflächenkontur aufweist, die eine spielfreie Kontaktfläche in einem vorgegebenen Drehbereich zu der Ausnehmung herstellt. Durch diese Ausbildung ist eine einfache Vorrichtung zur axialen Verstellung von einem oder mehreren Tragkörpern gegeben. Die Betätigungswelle ist achsparallel zu der Nockenwelle in geeigneten Lagervorrichtungen gelagert. Dazu bieten sich die ohnehin vorhandenen Lagerböcke der Nockenwelle an, in die nur eine zusätzliche Bohrung eingebracht werden muß.According to a development, the extension has a recess in the end region pointing away from the support body, into which an actuating shaft arranged transversely to the extension engages with a nose, the nose in the region interacting with the recess having a surface contour that has a play-free contact surface in a predetermined range of rotation to the recess. This design provides a simple device for the axial adjustment of one or more supporting bodies. The actuating shaft is mounted axially parallel to the camshaft in suitable bearing devices. The already existing bearing blocks of the camshaft are suitable for this purpose, into which only an additional hole has to be drilled.

Die Betätigungswelle wird nun ihrerseits über einen entsprechenden Hebel, an dem ein Verstellkolben angelenkt ist, verdreht. Der Verstellkolben kann beispielsweise bei Verwendung der Verstelleinrichtung als Förderbeginnverstellvorrichtung für ein Einspritzpumpenelement einer Brennkraftmaschine von den bekannten Anpassungsgruppen wie z.B. lastabhängige Förderbeginn- oder ladedruckabhängige Förderbeginn- Anpassungsgruppe verstellt werden. Dabei kann auf im Handel befindliche Serienteile, wie sie beispielsweise bei verteilereinspritzpumpen verwendet werden, zurückgegriffen werden. Weiterhin ist es erfindungsgemäß möglich, die Steuerung des Verstellkolbens von einer zentralen Steuerungselektronik zu steuern. Diese zuvor genannten Steuerungsmöglichkeiten sind sinngemäß bei einer Verwendung der Verstelleinrichtung zur Änderung der Steuerzeiten des Ventiltriebs einer Brennkraftmaschine übertragbar.The actuating shaft in turn is now turned via a corresponding lever on which an adjusting piston is articulated. The adjusting piston can be adjusted, for example, when using the adjusting device as a delivery start adjustment device for an injection pump element of an internal combustion engine by the known adaptation groups such as load-dependent delivery start or boost pressure-dependent delivery start adjustment group. It can be on commercially available series parts, as in used for example in distributor injection pumps. Furthermore, it is possible according to the invention to control the control of the adjusting piston from central control electronics. These control options mentioned above can be transferred analogously when the adjustment device is used to change the control times of the valve train of an internal combustion engine.

Die erfindungsgemäße Verstelleinrichtung ist insbesondere bei in das Brennkraftmaschinengehäuse direkt eingesetzten einzelnen Einspritzpumpenelementen anwendbar. Die Verstelleinrichtung ist aber auch dafür vorgesehen, in Reiheneinspritzpumpen eingebaut zu werden.The adjusting device according to the invention can be used in particular in the case of individual injection pump elements which are inserted directly into the internal combustion engine housing. The adjustment device is also intended to be installed in in-line injection pumps.

Um die Verstelleinrichtung und insbesondere den Stößel gegen Verdrehung zu sichern, sind beide Bauteile durch Stifte, die in entsprechende Nuten des Gehäuses bzw. des Tragkörpers eingreifen, gesichert.In order to secure the adjusting device and in particular the tappet against rotation, both components are secured by pins which engage in corresponding grooves in the housing or the support body.

Wie schon zuvor beschrieben wurde, läßt sich die erfindungsgemäße Verstelleinrichtung sowohl zur Förderbeginnverstellung der Einspritzpumpenelemente einer Brennkraftmaschine als auch zur Änderung der Ventilsteuerzeiten verwenden. Je nach Anwendungsfall werden sowohl die Einlaß- bzw. Auslaßventile alleine oder zusammen über entsprechende Verstelleinrichtungen verstellt.As has already been described above, the adjustment device according to the invention can be used both for adjusting the start of delivery of the injection pump elements of an internal combustion engine and for changing the valve timing. Depending on the application, both the intake and exhaust valves are adjusted alone or together using appropriate adjustment devices.

Weitere Merkmale und Vorteile der Erfindung sind aus der folgenden Zeichnungsbeschreibung zu entnehmen, in der ein Ausführungsbeispiel der Erfindung beschrieben ist. In dem Gehäuse 1 einer Brennkraftmaschine ist eine zentrale als Nockenwelle dienende Welle 2 angeordnet, die über neben- einander angeordnete Nocken 3 die Gaswechselventile und die Einspritzpumpenelemente 28 der Brennkraftmaschine betätigt. Ein Einspritzpumpenelement 28 ist auf einem Flansch 4 des Gehäuses 1 befestigt. Der Flansch 4 ist rechtwinkelig zu einer Verbindungslinie 5 zu der Nockenwelle.2 angeordnet. In den Flansch 4 ist eine Öffnung 6 eingearbeitet, durch die eine Stößelstange 7 eines Einspritzpumpenelementes 28 hindurchgeführt ist. Die Stößelstange 7 endet nockenwellenseitig in eine Platte 8, auf der sich eine zu dem Einspritzpumpenelement 28 hinweisende Feder 9 abstützt. Zwischen der Stößelstange 7 und der Nockenwelle 2 ist ein Stößel 10 in axialer Verlängerung der Verbindungslinie 5 angeordnet.Further features and advantages of the invention can be gathered from the following description of the drawings, in which an exemplary embodiment of the invention is described. A central shaft 2 serving as a camshaft is arranged in the housing 1 of an internal combustion engine. cams 3 arranged one another actuates the gas exchange valves and the injection pump elements 28 of the internal combustion engine. An injection pump element 28 is fastened on a flange 4 of the housing 1. The flange 4 is arranged at right angles to a connecting line 5 to the camshaft. 2. An opening 6 is machined into the flange 4, through which a push rod 7 of an injection pump element 28 is guided. The push rod 7 ends on the camshaft side in a plate 8, on which a spring 9 pointing toward the injection pump element 28 is supported. Between the push rod 7 and the camshaft 2, a push rod 10 is arranged in the axial extension of the connecting line 5.

Der Stößel 10 weist stößelstangenseitig eine Fläche 11 auf, die parallel zu der Platte 8 angeordnet ist, und auf der sich die Platte 8 abstützt. Der Abstand a und b zwischen dem Außendurchmesser der Platte 8 und dem Innendurchmesser eines kreisringförmigen Fortsatzes 12 der Fläche 11 ist so bemessen, daß er über den gesamten tangentialen Verstellbereich des Stößels 10 nicht Null wird.The plunger 10 has a surface 11 on the push rod side, which is arranged parallel to the plate 8 and on which the plate 8 is supported. The distance a and b between the outer diameter of the plate 8 and the inner diameter of an annular extension 12 of the surface 11 is such that it does not become zero over the entire tangential adjustment range of the plunger 10.

Auf der zu der Nockenwelle 2 weisenden Seite der Fläche 11 ist ebenfalls ein kreisringförmiger Fortsatz 12 a vorhanden. In diesen kreisringförmigen Fortsatz 12 a sind achsparallel zu der Nockenwelle 2 zwei Bohrungen eingearbeitet, in die eine Welle 13 eingesetzt ist, auf der innerhalb des kreisringförmigen Fortsatzes ein Laufrad 14 gelagert ist. Dieses achsparallel zu der Nockenwelle 2 ausgerichtete Laufrad 14 läuft auf dem radialen Umfang der Nockenwelle 2 bzw. des Nockens 3 ab und bewegt entsprechend der Oberflächenkontur der Nockenwelle 2 bzw. des Nockens 3 den Stößel 10 und entsprechend die Stößelstange 7 entang der Verbindungslinie 5.On the side of the surface 11 facing the camshaft 2 there is also an annular extension 12 a. In this annular extension 12 a, two bores are machined axially parallel to the camshaft 2, into which a shaft 13 is inserted, on which an impeller 14 is mounted within the annular extension. This impeller 14, which is aligned axially parallel to the camshaft 2, runs on the radial circumference of the camshaft 2 or the cam 3 and moves the tappet 10 according to the surface contour of the camshaft 2 or the cam 3 and accordingly the tappet rod 7 along the connecting line 5.

Geführt ist der Stößel 10 in einem Tragkörper 15, der in einer Ausnehmung 16 des Gehäuses 1 angeordnet ist. Dabei ist die Bewegungsrichtung des Tragkörpers 15, die durch dessen Mittellinie 17 darstellbar ist, um einen Winkelα zu der Verbindungslinie 5 geneigt. In den Tragkörper 15 ist eine zu der Verbindungslinie 5 achsparallele Bohrung 18 eingearbeitet, die dem Außendurchmesser des Stößels 10 entspricht. Der Tragkörper 15 weist weiterhin eine radiale Bohrung 19 auf, in die ein Stift 20 eingepreßt ist. Der Stift 20 greift mit seinem aus der Bohrung 19 herausragenden Ende in eine Nut 21, die achsparallel zu der Mittellinie 17 in die Ausnehmung 16 des Gehäuses 1 eingearbeitet ist. Durch diese Vorrichtung ist der Tragkörper 15 vor einer Verdrehung gegenüber dem Gehäuse 1 gesichert und kann nur in axialer Richtung entlang der Mittellinie 17 bewegt werden. Bei dieser Drehsicherungsfora ist der Tragkörper 15 vorzugsweise als zylindriges Bauteil gefertigt: Anstelle der Drehsicherungsform mittels Stift 20 und Nut 21 ist es auch erfindungsgemäß möglich, den als zylindriges Bauteil gefertigten Tragkörper 15 mittels Gleitstegen 30, die sich beidseitig eines Nockens 3 auf dem Grundkreis der Nockenwelle 2 abstützen, gegen Verdrehung zu sichern. Weicht die Außenkontur des Tragkörpers von einer Kreisform ab - beispielsweise bei einer rechteckigen Außenkontur -, so kann auf eine Drehsicherung verzichtet werden, da dann der Tragkörper verdrehsicher in einer entsprechend ausgebildeten Ausnehmung 16 geführt ist. In den Stößel 10 ist im Bereich der Fläche 11 eine radiale Sacklochbohrung 2 eingearbeitet, in die ebenfalls ein Stift 23 eingesetzt ist. Der Stift 23 ragt mit seinem aus der Sacklochbohrung 22 hervorragenden Ende in eine Nut 24, die in die Ausnehmung 16 des Tragkörpers 15 achsparallel zu der Verbindungslinie 5 eingearbeitet ist. Somit ist auch der Stößel 10 vor einer Verdrehung gegenüber dem Tragkörper 15 und gegenüber dem Gehäuse 1 gesichert..The plunger 10 is guided in a support body 15, which is arranged in a recess 16 of the housing 1. The direction of movement of the support body 15, which can be represented by its center line 17, is inclined by an angle α to the connecting line 5. A bore 18 which is parallel to the connecting line 5 and which corresponds to the outer diameter of the plunger 10 is machined into the support body 15. The support body 15 also has a radial bore 19 into which a pin 20 is pressed. The pin 20 engages with its end protruding from the bore 19 into a groove 21 which is machined axially parallel to the center line 17 in the recess 16 of the housing 1. With this device, the support body 15 is secured against rotation relative to the housing 1 and can only be moved in the axial direction along the center line 17. In this anti-rotation form, the support body 15 is preferably made as a cylindrical component: Instead of the anti-rotation form by means of pin 20 and groove 21, it is also possible according to the invention to use the support body 15, which is manufactured as a cylindrical component, by means of sliding webs 30, which are located on both sides of a cam 3 on the base circle of the camshaft Support 2 to secure against twisting. If the outer contour of the support body deviates from a circular shape - for example in the case of a rectangular outer contour - then rotation lock can be dispensed with, since the support body is then guided in a correspondingly designed recess 16 in a rotationally secure manner. In the plunger 10, a radial blind hole 2 is machined in the area of the surface 11, into which a pin 23 is also inserted. The pin 23 protrudes with its end protruding from the blind hole 22 into a groove 24, which axis 15 in the recess 16 of the support body is incorporated parallel to the connecting line 5. The plunger 10 is thus also secured against rotation with respect to the supporting body 15 and with respect to the housing 1.

Axial in Richtung der Mittellinie 17 bwegt wird der Tragkörper 15 von einer Betätigungswelle 25, die mit einer Nase 26 in eine Ausnehmung 27 eingreift, die in einen Fortsatz 28 des Tragkörpers 15 eingelassen ist. Dabei ist die Betätigungswelle 25 achsparallel zu der Nockenwelle 2 angeordnet und mit zumindest einem Hebel versehen, von dem die Betätigungswelle 25 um vorgegebene Winkelbereiche drehbar ist. Diese Drehung wird von einem nicht dargestellten Verstellkolben vorgenommen, der beispielsweise hydraulisch von dem steuerbaren Kraftstoffdruck verstellbar ist.The support body 15 is moved axially in the direction of the center line 17 by an actuating shaft 25 which engages with a nose 26 in a recess 27 which is let into an extension 28 of the support body 15. The actuating shaft 25 is arranged axially parallel to the camshaft 2 and is provided with at least one lever, by which the actuating shaft 25 can be rotated through predetermined angular ranges. This rotation is carried out by an adjusting piston, not shown, which can be adjusted hydraulically, for example, by the controllable fuel pressure.

Wird die Betätigungswelle 25 beispielsweise in Pfeilrichtung linksherum gedreht, so wird der Tragkörper 15 in Richtung auf den Flansch 4 verschoben. Dadurch, daß Tragkörper unter einem Winkeln zu dem Stößel 10 in dem Gehäuse 1 angeordnet ist, wird der Stößel 10 so verschoben, daß sich der Abstand b verkleinert und der Abstand a vergrößert. Dreht sich zugleich die Nockenwelle 2 beispielsweise in der dargestellten Pfeilrichtung, bedeutet eine derartige Verstellung des Stößels 10 eine Verschiebung des Förderbeginns in Richtung "früh". Eine gegen den Pfeil gerichtete Bewegung der Betätigungswelle 25 würde demgemäß bei unveränderter Nockenwellendrehrichtung eine Verschiebung des Förderbeginns in Richtung "spät" bewirken.If the actuating shaft 25 is rotated to the left, for example in the direction of the arrow, the support body 15 is displaced in the direction of the flange 4. Characterized in that the support body is arranged at an angle to the plunger 10 in the housing 1, the plunger 10 is displaced so that the distance b decreases and the distance a increases. If, at the same time, the camshaft 2 rotates, for example, in the direction of the arrow shown, such an adjustment of the tappet 10 means a shift in the start of delivery in the "early" direction. A movement of the actuating shaft 25 directed against the arrow would accordingly cause the start of delivery to be shifted towards the "late" direction if the camshaft rotation direction remains unchanged.

Claims (8)

1. Verstelleinrichtung, mit der ein Stößel (10), der von einem auf einer Welle (2) angeordneten Nocken (3) radial zu der Welle (2) bewegbar ist, tangential zu der Welle (2) verschiebbar ist, dadurch gekennzeichnet, daß die Verstelleinrichtung einen Tragkörper (15) aufweist, der unter einem Winkel (α) zu der von dem Nocken (3) hervorgerufenen radialen Bewegungsrichtung des Stößels (10) in einem ortsfesten Gehäuse (1) axial verschiebbar gelagert ist und wobei eine in dem Tragkörper (15) angebrachte Bohrung (18) achsparallel zu der Bewegungsrichtung (5) des Stößels (10) angeordnet ist und den Stößel (10) umfaßt.1. Adjustment device with which a plunger (10), which is movable radially to the shaft (2) by a cam (3) arranged on a shaft (2), is tangential to the shaft (2), characterized in that the adjustment device has a support body (15) which is axially displaceably mounted in a stationary housing (1) at an angle (α) to the radial direction of movement of the plunger (10) caused by the cam (3), and one in the support body ( 15) attached bore (18) is arranged axially parallel to the direction of movement (5) of the plunger (10) and includes the plunger (10). 2. Verstelleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an dem Tragkörper (15) ein Fortsatz (28) befestigt ist, mit dem der Tragkörper (15) axial bewegt wird.2. Adjusting device according to claim 1, characterized in that an extension (28) is fixed to the support body (15) with which the support body (15) is moved axially. 3. Verstelleinrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß der Fortsatz (28) in wellenseitiger axialer Verlängerung des Tragkörpers (15) angeordnet ist und die Welle (2) und den Nocken (3) tangential einseitig in einem Teilabschnitt berührungsfrei überdeckt.3. Adjusting device according to claim 2,
characterized in that the extension (28) is arranged in the shaft-side axial extension of the support body (15) and covers the shaft (2) and the cam (3) tangentially on one side in a partial section without contact. 4. Verstelleinrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß in dem Fortsatz (28) in dem von dem Tragkörper (15) wegweisenden Endbereich eine Ausnehmung (27) eingearbeitet ist, in die eine quer zu dem Fortsatz (28) angeordnete Betätigungswelle (25) mit einer Nase (26) eingreift, wobei die Nase (26) in dem mit der Ausnehmung (27) zusammenwirkenden Bereich eine Oberflächenkontur aufweist, die eine spielfreie Kontaktfläche in einem vorgegebenen Drehbereich zu der Ausnehmung (27) herstellt.4. Adjusting device according to one of claims 1 to 3,
characterized in that in the extension (28) in the end area pointing away from the support body (15) a recess (27) is machined into which an actuating shaft (25) arranged transversely to the extension (28) engages with a nose (26) , wherein the nose (26) in the area interacting with the recess (27) has a surface contour that creates a play-free contact surface in a predetermined range of rotation to the recess (27). 5. Verstelleinrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß in den Tragkörper (15) eine Bohrung (19) eingearbeitet ist, in die ein Stift (20) eingesetzt ist, der in einer in dem Gehäuse (1) eingearbeiteten Nut (21) geführt ist:5. Adjusting device according to one of claims 1 to 4,
characterized in that a bore (19) is machined into the support body (15), into which a pin (20) is inserted, which is guided in a groove (21) machined in the housing (1): 6. Verstelleinrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß in den Stößel (10) eine Sacklochbohrung (22) eingearbeitet ist, in die ein Stift (23) eingesetzt ist, der in einer in der Bohrung (18) des Tragkörpers (15) eingearbeiteten Längsnut (24) geführt ist.6. Adjusting device according to one of claims 1 to 5,
characterized in that a blind hole (22) is machined into the plunger (10), into which a pin (23) is inserted, which is guided in a longitudinal groove (24) machined in the bore (18) of the supporting body (15). 7. Verstelleinrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Verstelleinrichtung zur Förderbeginnverstellung zumindest eines Kraftstoff-Einspritzpumpenelementes (29) einer Brennkraftmaschine dient.7. Adjusting device according to one of claims 1 to 6,
characterized in that the adjusting device serves to adjust the start of delivery of at least one fuel injection pump element (29) of an internal combustion engine. 8. Verstelleirichtung. nach.einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, die Verstelleinrichtung zur Änderung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine dient.8. Adjustment direction. according to one of claims 1 to 7,
characterized in that the adjusting device serves to change the control times of gas exchange valves of an internal combustion engine.
EP87105933A 1986-04-26 1987-04-23 Control device for the fuel delivery and injection timing of an internal-combustion engine Expired - Lifetime EP0243874B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105933T ATE63975T1 (en) 1986-04-26 1987-04-23 ADJUSTMENT DEVICE FOR START OF DELIVERY AND CONTROL TIMES OF AN INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614281 1986-04-26
DE19863614281 DE3614281A1 (en) 1986-04-26 1986-04-26 ADJUSTMENT DEVICE FOR STARTING DRAWING AND TIMING TIMES OF AN INTERNAL COMBUSTION ENGINE

Publications (3)

Publication Number Publication Date
EP0243874A2 true EP0243874A2 (en) 1987-11-04
EP0243874A3 EP0243874A3 (en) 1989-09-27
EP0243874B1 EP0243874B1 (en) 1991-05-29

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Application Number Title Priority Date Filing Date
EP87105933A Expired - Lifetime EP0243874B1 (en) 1986-04-26 1987-04-23 Control device for the fuel delivery and injection timing of an internal-combustion engine

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US (1) US4760831A (en)
EP (1) EP0243874B1 (en)
AT (1) ATE63975T1 (en)
DE (2) DE3614281A1 (en)

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Also Published As

Publication number Publication date
ATE63975T1 (en) 1991-06-15
EP0243874B1 (en) 1991-05-29
US4760831A (en) 1988-08-02
DE3770330D1 (en) 1991-07-04
DE3614281A1 (en) 1987-10-29
EP0243874A3 (en) 1989-09-27

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