EP1527258A1 - Control device for adjusting the angle of rotation of a camshaft - Google Patents

Control device for adjusting the angle of rotation of a camshaft

Info

Publication number
EP1527258A1
EP1527258A1 EP03790671A EP03790671A EP1527258A1 EP 1527258 A1 EP1527258 A1 EP 1527258A1 EP 03790671 A EP03790671 A EP 03790671A EP 03790671 A EP03790671 A EP 03790671A EP 1527258 A1 EP1527258 A1 EP 1527258A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
crankshaft
turntable
stop
angle
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
EP03790671A
Other languages
German (de)
French (fr)
Other versions
EP1527258B1 (en
Inventor
Detlef Axmacher
Massimiliano Gasparro
Dirk Neubauer
Frank Pachan
Lars PFÜTZENREUTER
Markus Wilke
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.)
Schaeffler Engineering GmbH
Original Assignee
AFT Atlas Fahrzeugtechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AFT Atlas Fahrzeugtechnik GmbH filed Critical AFT Atlas Fahrzeugtechnik GmbH
Publication of EP1527258A1 publication Critical patent/EP1527258A1/en
Application granted granted Critical
Publication of EP1527258B1 publication Critical patent/EP1527258B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/04—Sensors
    • F01L2820/041—Camshafts position or phase sensors

Definitions

  • Control device for adjusting the angle of rotation of a camshaft
  • the invention relates to a control device for adjusting the angle of rotation of a camshaft according to the preamble of claim 1, as is known for example from DE 1 00 38 354 A1.
  • a control device for adjusting the angle of rotation of a camshaft relative to the angle of rotation of a crankshaft is described in the generic document DE 100 38 354.
  • a turntable connected to the crankshaft and a turntable connected to the camshaft are interlocked with one another via a swash plate of a swash plate transmission.
  • the turntable of the crankshaft and the turntable of the camshaft have a different number of teeth, which causes an offset in the angle of rotation between the two turntables when the swashplate is wobbled by a drive.
  • the offset between the angle of rotation of the crankshaft and the angle of rotation of the camshaft must not exceed a limit value, since otherwise the internal combustion engine can no longer work reliably according to the four-stroke principle.
  • the pistons can hit the opened gas exchange valves and thereby destroy the cylinder head.
  • the invention has for its object to provide a control device for adjusting the angle of rotation of the camshaft according to the preamble of claim 1, in which the angle of rotation by which the camshaft can be rotated relative to the crankshaft is limited.
  • This object is achieved by the feature in the characterizing part of claim 1, according to which mechanical means for limiting the adjustment of the angle of rotation are arranged between the crankshaft and the camshaft.
  • the swashplate gear is designed such that the crankshaft is connected via a primary drive to a camshaft wheel rotatably mounted on the camshaft, and that a turntable is connected to the camshaft, the camshaft gear and the turntable being toothed by the swashplate of the swashplate gear, then is formed as a mechanical means for limiting the adjustment of the angle of rotation on the turntable, in which engages a stop formed on the camshaft sprocket.
  • the width of the recess and the width of the stop determine the angle of rotation that the camshaft and the crankshaft can be adjusted against one another to a maximum.
  • Stop is arranged to determine the position of the recess.
  • This sensor device is advantageously designed as a Hall sensor which senses the side flanks of the recess in the turntable and the outer flanks of the stop of the camshaft wheel.
  • Such a sensor device for determining the position of the recess and the stop can also be used for determining the position of the camshaft and the crankshaft.
  • the position of the camshaft can be determined, for example, by determining the center point between the outer flanks of the recess in the turntable.
  • the position of the crankshaft is determined accordingly by the
  • the midpoint between the second flanks of the stop of the camshaft gear is determined.
  • control device for adjusting the angle of rotation of a camshaft is to be described and explained below using an exemplary embodiment in conjunction with three figures. Show it:
  • Figure 1 is a representation of the turntable having a recess
  • FIG. 2 shows a sectional view through the camshaft gear and the camshaft
  • 3a-3c three diagrams with signals sensed by a Hall sensor through the flanks of the recess and the flanks of the stop.
  • part of the crankshaft is connected to the crankshaft
  • Camshaft gear 1 and part of the camshaft carrying the turntable 2 are shown.
  • the turntable 2 can either be produced in one piece with the camshaft or can be connected to the camshaft, for example by screws.
  • the camshaft gear 1 and the turntable 2 are non-positively connected to one another by the swash plate which is not visible in this illustration.
  • a cutout 3 is formed on the turntable 2 of the camshaft, into which a stop 4 formed on the camshaft gear 1 projects.
  • the recess 3 and the stop 4 are dimensioned so that the frictional connection between the crankshaft and the camshaft can take place via the stop 4.
  • the cutout on the turntable can take up an angle segment of 40 to 70 degrees.
  • the respective positions of the recess 3 and the stop 4 during operation of the internal combustion engine are sensed by a sensor device which has a Hall sensor 5 as the sensor.
  • Hall sensor 5 senses the side edges 3a and 3d of the recess 3 and the outer edges 3b and 3c of the stop 4.
  • FIG. 2 shows the position of the hook sensor 5 relative to that in a sectional view
  • Stop 4 of the camshaft gear 1 and opposite the recess 3 of the turntable 2 of the camshaft can be in the camshaft Rad 1 be incorporated and screwed, or be made in one piece with the camshaft gear 1 by milling.
  • the signals sensed by the Hall sensor are plotted over the angle of rotation ⁇ in FIGS. 3a to 3c.
  • the recess 3 appears as a low signal level between the edges 6a and ⁇ d. Outside the edges 6a and 6d, the sensor senses
  • Hall sensor 5 a high signal level, which is caused by the wall of the turntable 2.
  • the stop 4 appears within the edges 6a and 6d of the recess 3 as a high signal level of small width with the edges 6b and ⁇ c.
  • the position of the stop 4 within the recess 3 of the turntable 2 can thus be determined by evaluating this signal course, as a result of which the current offset between the crankshaft and the cam shaft can be determined.
  • FIG. 3a shows the position of the stop 4 of the camshaft gear 1 which is characterized by the flanks 6b and 6c and which follows the speed curve of the camshaft.
  • FIG. 3b shows the position of the stop 4 of the camshaft gear 1 which is characterized by the flanks 6b and 6c and which runs along with the speed curve of the camshaft.
  • the gas exchange valves open in the working cycle like in a normal internal combustion engine.
  • FIG. 3c shows the position of the stop 4 of the camshaft gear 1 which is characterized by the flanks 6b and ⁇ c and which leads the speed curve of the camshaft.
  • the position of the crankshaft and the camshaft can be determined by evaluating the signal curve, as a result of which the devices for determining the position of the crankshaft and the camshaft which are otherwise customary in an internal combustion engine can be dispensed with.
  • the cut-out 3 in the turntable 2 of the camshaft gear and the stop 4 formed on the camshaft gear 1 prevent damage to the internal combustion engine due to an excessive offset in the angle of rotation between the crankshaft and the camshaft.

Abstract

The invention relates to a control device for adjusting the angle of rotation of a camshaft (2) relative to the angle of rotation of a crankshaft by means of a swashplate mechanism that is disposed between the camshaft (2) and the crankshaft and is provided with mechanical means which limit the adjustment of the angle of rotation and are arranged between the crankshaft and the camshaft.

Description

Steuereinrichtung zum Verstellen des Drehwinkels einer Nockenwelle Control device for adjusting the angle of rotation of a camshaft
Die Erfindung betrifft eine Steuereinrichtung zum Verstellen des Drehwinkels einer Nockenwelle gemäß dem Oberbegriff des Patentanspruchs 1 , wie es beispielsweise aus der DE 1 00 38 354 A1 bekannt ist.The invention relates to a control device for adjusting the angle of rotation of a camshaft according to the preamble of claim 1, as is known for example from DE 1 00 38 354 A1.
In der gattungsbildenden Druckschrift DE 100 38 354 ist eine Steuereinrichtung zum Verstellen des Drehwinkels einer Nockenwelle gegenüber dem Drehwinkei einer Kurbelwelle beschrieben. Bei dieser Steuereinrichtung sind eine mit der Kurbelwelle verbundene Drehscheibe und eine mit der Nockenwelle verbundene Drehscheibe über eine Taumelscheibe eines Taumelscheibengetriebes miteinander verzahnt. Dabei weisen die Drehscheibe der Kurbelwelle und die Drehscheibe der Nok- kenwelle eine unterschiedliche Zahnzahl auf, wodurch zwischen den beiden Drehscheiben bei einer von einem Antrieb erzeugten Taumeldrehung der Taumelscheibe ein Versatz im Drehwinkel entsteht.A control device for adjusting the angle of rotation of a camshaft relative to the angle of rotation of a crankshaft is described in the generic document DE 100 38 354. In this control device, a turntable connected to the crankshaft and a turntable connected to the camshaft are interlocked with one another via a swash plate of a swash plate transmission. The turntable of the crankshaft and the turntable of the camshaft have a different number of teeth, which causes an offset in the angle of rotation between the two turntables when the swashplate is wobbled by a drive.
Der Versatz zwischen dem Drehwinkel der Kurbelwelle und dem Drehwinkel der Nockenwelle darf einen Grenzwert nicht überschreiten, da die Brennkraftmaschine sonst nicht mehr zuverlässig nach dem Viertaktprinzip arbeiten kann. Bei einem extremen Versatz, beispielsweise bei einem Defekt des Antriebes der Taumelscheibe, können die Kolben auf die geöffneten Gaswechselventile schlagen und dabei den Zylinderkopf zerstören.The offset between the angle of rotation of the crankshaft and the angle of rotation of the camshaft must not exceed a limit value, since otherwise the internal combustion engine can no longer work reliably according to the four-stroke principle. In the event of an extreme offset, for example in the event of a defect in the drive of the swash plate, the pistons can hit the opened gas exchange valves and thereby destroy the cylinder head.
Der Erfindung liegt die Aufgabe zugrunde, eine Steuereinrichtung zum Verstellen des Drehwinkels der Nockenwelle gemäß dem Oberbegriff des Patentanspruchs 1 anzugeben, bei der der Drehwinkel, den die Nockenwelle gegenüber der Kurbelwelle verdreht werden kann, begrenzt ist. Diese Aufgabe wird erfindungsgemäß durch das Merkmal im Kennzeichen des Patentanspruchs 1 gelöst, wonach zwischen der Kurbelwelle und der Nockenwelle mechanische Mittel zur Begrenzung der Verstellung des Drehwinkels angeordnet sind. Ist das Taumelscheibengetriebe so ausgebildet, daß die Kurbelwelle über einen Pri- märtrieb mit einem auf der Nockenwelle drehbar gelagerten Nockenwellenrad verbunden ist, und daß mit der Nockenwelle eine Drehscheibe verbunden ist, wobei das Nockenwellenrad und die Drehscheibe durch die Taumelscheibe des Taumelscheibengetriebes verzahnt sind, dann ist als mechanisches Mittel zur Begrenzung der Verstellung des Drehwinkels an der Drehscheibe eine Aussprung ausgebildet, in die ein am Nockenwellenrad ausgebildeter Anschlag eingreift.The invention has for its object to provide a control device for adjusting the angle of rotation of the camshaft according to the preamble of claim 1, in which the angle of rotation by which the camshaft can be rotated relative to the crankshaft is limited. This object is achieved by the feature in the characterizing part of claim 1, according to which mechanical means for limiting the adjustment of the angle of rotation are arranged between the crankshaft and the camshaft. If the swashplate gear is designed such that the crankshaft is connected via a primary drive to a camshaft wheel rotatably mounted on the camshaft, and that a turntable is connected to the camshaft, the camshaft gear and the turntable being toothed by the swashplate of the swashplate gear, then is formed as a mechanical means for limiting the adjustment of the angle of rotation on the turntable, in which engages a stop formed on the camshaft sprocket.
Durch die Breite der Aussparung und durch Breite des Anschlages ist der Drehwinkel bestimmt, den die Nockenwelle und die Kurbelwelle maximal gegeneinander verstellt werden kann.The width of the recess and the width of the stop determine the angle of rotation that the camshaft and the crankshaft can be adjusted against one another to a maximum.
In einer weiteren Weiterbildung der Erfindung ist vorgesehen, daß innerhalb des Taumelscheibengetriebes ein Sensorvorrichtung zur Bestimmung der Position desIn a further development of the invention, it is provided that a sensor device for determining the position of the
Anschlages und zur Bestimmung der Position der Aussparung angeordnet ist.Stop and is arranged to determine the position of the recess.
Diese Sensorvorrichtung ist vorteilhaft als ein die Seitenflanken der Aussparung der Drehscheibe und die Außenflanken des Anschlags des Nockenwellenrades sensie- render Hallsensor ausgebildet. Eine derartige Sensorvorrichtung zur Bestimmung der Position der Aussparung und des Anschlages kann zudem zur Bestimmung der Position der Nockenwelle und der Kurbelwelle verwendet werden.This sensor device is advantageously designed as a Hall sensor which senses the side flanks of the recess in the turntable and the outer flanks of the stop of the camshaft wheel. Such a sensor device for determining the position of the recess and the stop can also be used for determining the position of the camshaft and the crankshaft.
Dabei kann die Position der Nockenwelle beispielsweise bestimmt werden, indem der Mittelpunkt zwischen den Außenflanken der Aussparung der Drehscheibe be- stimmt wird. Entsprechend wird die Position der Kurbelwelle bestimmt, indem derThe position of the camshaft can be determined, for example, by determining the center point between the outer flanks of the recess in the turntable. The position of the crankshaft is determined accordingly by the
Mittelpunkt zwischen den zweiten Flanken des Anschlages des Nockenwellenrades bestimmt wird.The midpoint between the second flanks of the stop of the camshaft gear is determined.
Im folgenden soll die erfindungsgemäße Steuereinrichtung zum Verstellen des Drehwinkels einer Nockenwelle anhand von einem Ausführungsbeispiel im Zusam- menhang mit drei Figuren beschrieben und erläutert werden. Es zeigen:The control device according to the invention for adjusting the angle of rotation of a camshaft is to be described and explained below using an exemplary embodiment in conjunction with three figures. Show it:
Figur 1 eine Darstellung der eine Aussparung aufweisenden Drehscheibe derFigure 1 is a representation of the turntable having a recess
Kurbelwelle und des an dem Nockenwellenrad ausgebildeten An- Schlages,Crankshaft and the stop formed on the camshaft gear,
Figur 2 ein Schnittbild durch das Nockenwellenrad und die Nockenwelle,FIG. 2 shows a sectional view through the camshaft gear and the camshaft,
Figur 3a - 3c drei Diagramme mit von einem Hallsensor durch die Flanken der Aussparung und den Flanken des Anschlages sensierten Signalen.3a-3c three diagrams with signals sensed by a Hall sensor through the flanks of the recess and the flanks of the stop.
In der Figur 1 ist ein Teil des über eine Steuerkette mit der Kurbelwelle verbundenenIn FIG. 1, part of the crankshaft is connected to the crankshaft
Nockenwellenrades 1 und ein Teil der die Drehscheibe 2 tragenden Nockenwelle dargestellt. Die Drehscheibe 2 kann entweder einstückig mit der Nockenwelle hergestellt worden sein oder beispielsweise durch Schrauben mit der Nockenwelle verbunden sein. Das Nockenwellenrad 1 und die Drehscheibe 2 sind durch die in dieser Darstellung nicht sichtbare Taumelscheibe kraftschlüssig miteinander verbunden.Camshaft gear 1 and part of the camshaft carrying the turntable 2 are shown. The turntable 2 can either be produced in one piece with the camshaft or can be connected to the camshaft, for example by screws. The camshaft gear 1 and the turntable 2 are non-positively connected to one another by the swash plate which is not visible in this illustration.
Zur Vermeidung eines zu großen Versatzes zwischen der Kurbelwelle und der Nokkenwelle ist an der Drehscheibe 2 der Nockenwelle eine Aussparung 3 ausgebildet, in die ein am Nockenwellenrad 1 ausgebildeter Anschlag 4 hineinragt. Die Aussparung 3 und der Anschlag 4 sind dabei so dimensioniert, daß der Kraftschluß zwi- sehen der Kurbelwelle und der Nockenwelle über den Anschlag 4 erfolgen kann.To avoid excessive offset between the crankshaft and the camshaft, a cutout 3 is formed on the turntable 2 of the camshaft, into which a stop 4 formed on the camshaft gear 1 projects. The recess 3 and the stop 4 are dimensioned so that the frictional connection between the crankshaft and the camshaft can take place via the stop 4.
Zur Beeinflussung der Öffnungszeiten der Gaswechselventile kann die Aussparung an der Drehscheibe ein Winkelsegment von 40 bis 70 Grad einnehmen. Die jeweilige Positionen der Aussparung 3 und des Anschlages 4 beim Betrieb der Brennkraftmaschine werden durch eine Sensorvorrichtung sensiert, die als Sensor einen Hallsensor 5 aufweist. Bei der Drehung der Nockenweile werden von demIn order to influence the opening times of the gas exchange valves, the cutout on the turntable can take up an angle segment of 40 to 70 degrees. The respective positions of the recess 3 and the stop 4 during operation of the internal combustion engine are sensed by a sensor device which has a Hall sensor 5 as the sensor. When the cam shaft is rotated by the
Hallsensor 5 die Seitenkanten 3a und 3d der Aussparung 3 sowie die Außenkanten 3b und 3c des Anschlages 4 sensiert.Hall sensor 5 senses the side edges 3a and 3d of the recess 3 and the outer edges 3b and 3c of the stop 4.
In der Figur 2 ist in einem Schnittbild die Position des Hailsensors 5 gegenüber demFIG. 2 shows the position of the hook sensor 5 relative to that in a sectional view
Anschlag 4 des Nockenwellenrades 1 und gegenüber der Aussparung 3 der Dreh- scheibe 2 der Nockenwelle dargestellt. Der Anschlag 4 kann in das Nockenwellen- rad 1 eingearbeitet und verschraubt sein, oder durch Fräsen einstückig mit dem Nockenwellenrad 1 hergestellt sein.Stop 4 of the camshaft gear 1 and opposite the recess 3 of the turntable 2 of the camshaft. The stop 4 can be in the camshaft Rad 1 be incorporated and screwed, or be made in one piece with the camshaft gear 1 by milling.
In den Figuren 3a bis 3c sind die von dem Hallsensor sensierten Signale über dem Drehwinkel ω aufgetragen. Dabei erscheint die Aussparung 3 als geringer Signalpe- gel zwischen den Flanken 6a und όd. Außerhalb der Flanken 6a und 6d sensiert derThe signals sensed by the Hall sensor are plotted over the angle of rotation ω in FIGS. 3a to 3c. The recess 3 appears as a low signal level between the edges 6a and όd. Outside the edges 6a and 6d, the sensor senses
Hallsensor 5 einen hohen Signalpegel, der von der Wandung der Drehscheibe 2 verursacht wird. Der Anschlag 4 erscheint innerhalb der Flanken 6a und 6d der Aussparung 3 als hoher Signalpegel geringer Breite mit den Flanken 6b und όc. So kann durch Auswertung dieses Signalverlaufes die Position des Anschlages 4 innerhalb des Aussparung 3 der Drehscheibe 2 bestimmt werden, wodurch der aktuelle Versatzes zwischen der Kurbelwelle und der Nockenweile bestimmt werden kann.Hall sensor 5 a high signal level, which is caused by the wall of the turntable 2. The stop 4 appears within the edges 6a and 6d of the recess 3 as a high signal level of small width with the edges 6b and όc. The position of the stop 4 within the recess 3 of the turntable 2 can thus be determined by evaluating this signal course, as a result of which the current offset between the crankshaft and the cam shaft can be determined.
Die Figur 3a zeigt die durch die Flanken 6b und 6c charakterisierte Position des Anschlages 4 des Nockenwellenrades 1 , der dem Drehzahlverlauf der Nockenwelle nachläuft. Bei einem derartigen Versatz -zwischen der Kurbelwelle und der Nocken- welle öffnen sich die Gaswechselventile im Arbeitsspiel früher als bei einer normalenFIG. 3a shows the position of the stop 4 of the camshaft gear 1 which is characterized by the flanks 6b and 6c and which follows the speed curve of the camshaft. With such an offset - between the crankshaft and the camshaft, the gas exchange valves open earlier in the work cycle than in a normal one
Brennkraftmaschine mit einer starrer Verbindung zwischen der Kurbelwelle und der Nockenwelle.Internal combustion engine with a rigid connection between the crankshaft and the camshaft.
Die Figur 3b zeigt die durch die Flanken 6b und 6c charakterisierte Position des Anschlages 4 des Nockenwellenrades 1 , der mit dem Drehzahlverlauf der Nockenwelle mitläuft. Dabei öffnen sich die Gaswechselventile im Arbeitsspiel wie bei einer normalen Brennkraftmaschine.FIG. 3b shows the position of the stop 4 of the camshaft gear 1 which is characterized by the flanks 6b and 6c and which runs along with the speed curve of the camshaft. The gas exchange valves open in the working cycle like in a normal internal combustion engine.
Die Figur 3c zeigt die durch die Flanken 6b und όc charakterisierte Position des Anschlages 4 des Nockenwellenrades 1 , der dem Drehzahlverlauf der Nockenwelle vorläuft. Bei einem derartigen Versatz zwischen der Kurbelwelle und der Nocken- welle öffnen sich die Gaswechselventile im Arbeitsspiel später als bei einer normalen Brennkraftmaschine.FIG. 3c shows the position of the stop 4 of the camshaft gear 1 which is characterized by the flanks 6b and όc and which leads the speed curve of the camshaft. With such an offset between the crankshaft and the camshaft, the gas exchange valves open later in the work cycle than in a normal internal combustion engine.
Zudem kann durch Auswertung des Signalverlaufes die Position der Kurbelwelle und der Nockenwelle bestimmt werden, wodurch auf die sonst bei einer Brennkraftmaschine üblichen Vorrichtungen zur Bestimmung der Position der Kurbelwelle und der Nockenwelle verzichtet werden kann. Dabei werden vorteilhaft die Mittelpunkte derIn addition, the position of the crankshaft and the camshaft can be determined by evaluating the signal curve, as a result of which the devices for determining the position of the crankshaft and the camshaft which are otherwise customary in an internal combustion engine can be dispensed with. The centers of the
Flanken 6a und όd der Aussparung 3 der Drehscheibe 2 sowie der Flanken 6b und όc des Anschlages 4 bestimmt. Zudem können in die Drehscheibe 2 weitere Aussparungen eingebracht werden, durch welche die Position der Drehscheibe mit einer höheren Auflösung bestimmt werden kann.Flanks 6a and όd of the recess 3 of the turntable 2 and the flanks 6b and όc of the stop 4 determined. In addition, further cutouts can be made in the turntable, through which the position of the turntable can be determined with a higher resolution.
Durch die Aussparung 3 der Drehscheibe 2 des Nockenwellenrades und den am Nockenwellenrad 1 ausgebildeten Anschlag 4 werden Schäden an der Brennkraftmaschine durch einen zu großen Versatz im Drehwinkel zwischen der Kurbelwelle und der Nockenwelle vermieden. The cut-out 3 in the turntable 2 of the camshaft gear and the stop 4 formed on the camshaft gear 1 prevent damage to the internal combustion engine due to an excessive offset in the angle of rotation between the crankshaft and the camshaft.

Claims

Patentansprüche claims
1 . Steuereinrichtung zum Verstellen des Drehwinkels einer Nockenwelle gegenüber dem Drehwinkel einer Kurbelwelle mittels einem zwischen der Nockenwelle und der Kurbelwelle angeordneten Taumelscheibengetriebe, dadurch gekennzeichnet, daß zwischen der Kurbelwelle und der Nockenwelle (2) mechanische Mittel zur Begrenzung der Verstellung des Drehwinkels angeordnet sind.1 . Control device for adjusting the angle of rotation of a camshaft in relation to the angle of rotation of a crankshaft by means of a swash plate gear arranged between the camshaft and the crankshaft, characterized in that mechanical means for limiting the adjustment of the angle of rotation are arranged between the crankshaft and the camshaft (2).
2. Steuereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die Kurbel- welle über einen Primärtrieb mit der Nockenwelle verbunden ist, daß auf der2. Control device according to claim 1, characterized in that the crankshaft is connected via a primary drive to the camshaft that on the
Nockenwelle ein drehbar gelagertes, mit dem Primärtrieb verbundenes Nockenwellenrad (1 ) angeordnet ist, daß mit der Nockenwelle eine Drehscheibe (2) verbunden ist, und daß das Nockenwellenrad (1 ) und die Drehscheibe (2) durch die Taumelscheibe des Taumelscheibengetriebes verbunden sind. Camshaft is a rotatably mounted camshaft gear (1) connected to the primary drive, that a turntable (2) is connected to the camshaft, and that the camshaft gear (1) and the turntable (2) are connected by the swashplate of the swashplate gear.
3. Steuereinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die mechanischen Mittel in der Form ausgebildet sind, daß an der Drehscheibe (2) eine Aussparung (3) ausgebildet ist, und daß an dem Nockenwellenrad (1 ) ein in die Aussparung (3) der Drehscheibe (2) greifender Anschlag (4) ausgebildet ist.3. Control device according to claim 2, characterized in that the mechanical means are designed in such a way that a recess (3) is formed on the turntable (2), and that on the camshaft gear (1) in the recess (3) the turntable (2) engaging stop (4) is formed.
4. Steuereinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß durch die Brei- te der Aussparung (3) und durch Breite des Anschlages (4) der Drehwinkel bestimmt ist, den die Nockenwelle und die Kurbelwelle maximal gegeneinander verstellt werden können.4. Control device according to claim 3, characterized in that the angle of rotation is determined by the width of the recess (3) and by the width of the stop (4), the camshaft and the crankshaft can be adjusted to a maximum against each other.
5. Steuereinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß innerhalb des Taumelscheibengetriebes ein Sensorvorrichtung zur Bestim- mung der Position des Anschlages (4) und zur Bestimmung der Position der Aussparung (3) angeordnet ist. 5. Control device according to one of claims 1 to 4, characterized in that a sensor device for determining the position of the stop (4) and for determining the position of the recess (3) is arranged within the swash plate mechanism.
6. Steuereinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Sensorvorrichtung als ein die Seitenflanken (3a, 3d) der Aussparung (3) der Drehscheibe (2) und ein die Außenflanken (3b, 3c) des Anschlags (4) des Nockenwellenrades (1 ) sensierender Hallsensor (5) ausgebildet ist. 6. Control device according to claim 5, characterized in that the sensor device as a the side flanks (3a, 3d) of the recess (3) of the turntable (2) and one of the outer flanks (3b, 3c) of the stop (4) of the camshaft gear (1 ) sensing Hall sensor (5) is formed.
7. Verfahren zum Betreiben der Steuereinrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß durch die Sensorvorrichtung zur Bestimmung der Position der Aussparung (3) und des Anschlages (4) die Position der Nockenwelle und der Kurbelwelle bestimmt wird.7. The method for operating the control device according to claim 5 or 6, characterized in that the position of the camshaft and the crankshaft is determined by the sensor device for determining the position of the recess (3) and the stop (4).
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Position der Nok- kenwelle bestimmt wird, indem der Mittelpunkt zwischen den Seitenflanken (3b,8. The method according to claim 7, characterized in that the position of the camshaft is determined by the center between the side flanks (3b,
3c) der Aussparung (3) der Drehscheibe (2) bestimmt wird, und daß die Position der Kurbelwelle bestimmt wird, indem der Mittelpunkt zwischen den Außenflanken (3b, 3c) des Anschlages (4) des Nockenwellenrades (1) bestimmt wird. 3c) of the recess (3) of the turntable (2) is determined, and that the position of the crankshaft is determined by determining the center point between the outer flanks (3b, 3c) of the stop (4) of the camshaft gear (1).
EP03790671A 2002-08-09 2003-08-04 Control device for adjusting the angle of rotation of a camshaft Expired - Fee Related EP1527258B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10236507 2002-08-09
DE10236507A DE10236507A1 (en) 2002-08-09 2002-08-09 Controller for adjusting camshaft rotation angle relative to crankshaft, has mechanical arrangement for limiting adjustment of rotation angle arranged between crankshaft and camshaft
PCT/DE2003/002607 WO2004020794A1 (en) 2002-08-09 2003-08-04 Control device for adjusting the angle of rotation of a camshaft

Publications (2)

Publication Number Publication Date
EP1527258A1 true EP1527258A1 (en) 2005-05-04
EP1527258B1 EP1527258B1 (en) 2008-09-03

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EP03790671A Expired - Fee Related EP1527258B1 (en) 2002-08-09 2003-08-04 Control device for adjusting the angle of rotation of a camshaft

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US (1) US6997151B2 (en)
EP (1) EP1527258B1 (en)
DE (2) DE10236507A1 (en)
ES (1) ES2312846T3 (en)
WO (1) WO2004020794A1 (en)

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Also Published As

Publication number Publication date
DE50310441D1 (en) 2008-10-16
DE10236507A1 (en) 2004-02-19
ES2312846T3 (en) 2009-03-01
US20050211208A1 (en) 2005-09-29
US6997151B2 (en) 2006-02-14
WO2004020794A1 (en) 2004-03-11
EP1527258B1 (en) 2008-09-03

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