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EP1411214A2 - Disconnectable supporting element for valve drive in an internal combustion engine - Google Patents

Disconnectable supporting element for valve drive in an internal combustion engine Download PDF

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Publication number
EP1411214A2
EP1411214A2 EP03021704A EP03021704A EP1411214A2 EP 1411214 A2 EP1411214 A2 EP 1411214A2 EP 03021704 A EP03021704 A EP 03021704A EP 03021704 A EP03021704 A EP 03021704A EP 1411214 A2 EP1411214 A2 EP 1411214A2
Authority
EP
European Patent Office
Prior art keywords
outer part
receptacle
inner element
support element
coupling means
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
EP03021704A
Other languages
German (de)
French (fr)
Other versions
EP1411214B1 (en
EP1411214A3 (en
Inventor
Mario Kuhl
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 Technologies AG and Co KG
Original Assignee
INA Schaeffler KG
Schaeffler KG
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 INA Schaeffler KG, Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1411214A2 publication Critical patent/EP1411214A2/en
Publication of EP1411214A3 publication Critical patent/EP1411214A3/en
Application granted granted Critical
Publication of EP1411214B1 publication Critical patent/EP1411214B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves

Definitions

  • the invention relates to a switchable support element for a valve train Internal combustion engine, with one over its outer surface in one receptacle an internal combustion engine can be arranged, in the bore an axially movable inner element with a head for one-end support a cam follower and with a hydraulic lash adjuster runs, the outer part and the inner element in an axially distant Relative position can optionally be coupled to one another via coupling means, which in the decoupling case in the inner element and in the coupling case in sections in one Receiving the bore of the outer part run and being supply lines for Hydraulic fluid to the coupling means and to the lash adjuster are provided.
  • Such a support element is derived from that considered to be generic DE 196 04 866 A1.
  • On the one hand it can be seen that only one piston is provided as a lock. Because of this, there is a coupling case always the risk of the inner element tilting towards the outer part.
  • a relatively large pressure is present in the coupling area is present, which leads to, for example, that over the operating period of the support element also increases the locking play.
  • the object of the invention is therefore a switchable support element of the aforementioned To create a way in which the disadvantages cited are eliminated.
  • this object is achieved in that in sections common supply lines are applied by the outer surface of the outer part go out, the united area of two diametrically opposite horizontal passages in the outer part and the radially inner ones Recording consists, which is made as a circulation groove, the inclusion of cut the passage and at the same time as a pressure chamber for the hydraulic medium is designed to shift the coupling means into the inner element, wherein at least one path from the receptacle as a separate feed line of the hydraulic medium leads to the lash adjuster, with two pistons as Coupling means are provided in a radial bore of the inner element run, axially away from each other by pressure spring means and closed the passages are in alignment and the inner element is freely rotatable runs in the outer part.
  • the outer part can be in any Twist position installed in the corresponding holder of the cylinder head become.
  • the outer lateral surface of the outer part an annular groove, which according to another Specification of the invention, for example axially above the receptacle can be arranged.
  • the annular groove on a Position the height of the passages. Appropriately leads from the annular groove one channel for each passage.
  • it can be provided at the end of the corresponding supply line to the cylinder head Arrange an annular groove in the receptacle, which then on the annular groove in Outer part can be dispensed with.
  • pistons instead of the pistons as coupling means, other shapes or elements that generate a form-fit connection, such as needles, Jacks, balls and the like.
  • the underside of the pistons as a coupling agent is the surface pressure in the coupling area (Ring surface of the receptacle) lowered.
  • Another subclaim relates to an appropriate training of Paths to the game compensation facility.
  • This path should start from an upper side of the receptacle, for example as a longitudinal channel on the outer jacket of the inner element. This can also be spirally on the outer jacket climb. At its upper end, the longitudinal channel opens into one Cross drilling or the like as a further part of the path through the Inner element. From there, the hydraulic fluid becomes hydraulic Match compensation device performed in a known manner. Possibly. can he Path to the game balancer, starting from the recording, too directly through the inner element towards the play compensation device be performed.
  • a height stop for the To create interior element is provided.
  • This height stop also serves as a protection against loss for the interior element.
  • Over the inward section can a locking game of the piston set as a coupling means in the recording become.
  • it is also conceivable for adjustment of the locking game separate washers or the like in the aforementioned Apply area or group the pistons themselves. Is too it provided a puncture on one of the elements (outer part / inner element) to realize in which a circlip or the like, the puncture accordingly outstanding, is arranged. This circlip or the like communicates then with correspondingly designed stop surfaces on the opposite.
  • the measures according to the invention are also applicable to switchable roller tappets applicable, in which case only the outer part is not freely rotatable is formed and the head of the inner element on a push rod acts.
  • a switchable support element 1 for a valve train is shown Internal combustion engine. This has an outer part 3, in the bore 4 axially an inner element 5 is movably installed. The outer part 3 is about his outer lateral surface 2 in a receptacle of a cylinder head of an internal combustion engine mountable.
  • the inner element 5 is hydraulic Match compensation device 7 provided in a known type. It towers over with its head 6 an upper end face 23 of the outer part 3. On the head 6 a lever-like cam follower can be supported at one end.
  • the inner element 5 has a radial bore 13. This may also have an arches or skewed course.
  • the coupling means 8 have, starting from their radially outer end face 17 each of their undersides 18 has a flattening 19. They lie over them, as in FIG 1 emerges, in the coupling case generated by compression spring force on an annular surface 20 of a receptacle 9 within the bore 4 of the outer part 3. On a Protection against rotation of the inner element 5 to the outer part 3 has been dispensed with, since the recording 9 revolves completely.
  • the upper end face 23 of the outer part 3 provided with a radially inwardly facing section 25. This communicates with a ring shoulder 28 a diameter reduction 27 on the outer jacket 22 of the inner element 5.
  • a game of the above-mentioned height stop Locking of the coupling means 8 set in its receptacle 9.
  • each coupling means 8 a channel 16 for the supply of hydraulic medium. It is clear that to the Ring groove 15 a channel for supplying the hydraulic fluid from the cylinder head the internal combustion engine is introduced.
  • sections are common to the feed lines hydraulic lash adjuster 7 and to the coupling means 8; i.e. in other words, only a single-flow variant is shown here is.
  • the common supply line include in particular the coupling means 8 aligned passages 11 in the outer part 3 for the hydraulic medium and the aforementioned recording 9 itself, which at the same time as Pressure chamber of an annular type for the radially inward displacement of the Coupling means 8 is used for the decoupling case.
  • the coupling means 8 is guaranteed that there is always a sufficient amount of hydraulic fluid for the lash adjuster 7 can be directed. This is realized in that Seen from the side of the coupling means 8, a circumferential direction is still sufficient large cross section at the passages 11 is released.
  • a riser channel 21 is located away from the receptacle 9 Outer jacket 22 of the inner element 5 applied. This goes into one at the end Cross bore 24, which is then indirect and in the art familiar and leads to the hydraulic lash adjuster 7. Possibly. can several circumferentially distributed risers 21 may also be provided. Also they do not have to be circumferentially offset from the coupling means, as shown in the drawing 8 be formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The switched valve support unit (1), for an internal combustion motor valve, has an outer mantle surface (2) as an outer section (3) for fitting into the motor cylinder head. Its hollow interior (4) contains a component (5) with axial movements, with a head (6) at one end supporting a cam follower running with a hydraulic play compensation unit (7). The outer section and the axially moving component are selectively linked together by a coupling (8) when in axially displaced relative settings. The valve support has a single flow supply for the coupling and the play compensation unit.

Description

Gebiet der ErfindungField of the Invention

Die Erfindung betrifft ein schaltbares Abstützelement für einen Ventiltrieb einer Brennkraftmaschine, mit einem über dessen äußere Mantelfläche in einer Aufnahme einer Brennkraftmaschine anordenbaren Außenteil, in dessen Bohrung ein axial bewegliches Innenelement mit einem Kopf zur einenendigen Abstützung eines Nockenfolgers und mit einer hydraulischen Spielausgleichseinrichtung verläuft, wobei das Außenteil und das Innenelement in einer axial entfernten Relativstellung über Koppelmittel wahlweise miteinander koppelbar sind, die im Entkoppelfall im Innenelement und im Koppelfall abschnittsweise in einer Aufnahme der Bohrung des Außenteils verlaufen und wobei Zuleitungen für Hydraulikmittel zu den Koppelmitteln und zu der Spielausgleichseinrichtung vorgesehen sind. The invention relates to a switchable support element for a valve train Internal combustion engine, with one over its outer surface in one receptacle an internal combustion engine can be arranged, in the bore an axially movable inner element with a head for one-end support a cam follower and with a hydraulic lash adjuster runs, the outer part and the inner element in an axially distant Relative position can optionally be coupled to one another via coupling means, which in the decoupling case in the inner element and in the coupling case in sections in one Receiving the bore of the outer part run and being supply lines for Hydraulic fluid to the coupling means and to the lash adjuster are provided.

Hintergrund der ErfindungBackground of the Invention

Ein derartiges Abstützelement geht aus der als gattungsbildend betrachteten DE 196 04 866 A1 hervor. Zu erkennen ist zum einen, dass lediglich ein Kolben als Verriegelung vorgesehen ist. Aufgrund dessen besteht im Koppelfall stets die Gefahr eines Verkippens des Innenelements zum Außenteil. Des weiteren ist dem Fachmann klar, dass im Koppelbereich eine relativ große Pressung vorliegt, die beispielsweise dazu führt, dass über den Betriebszeitraum des Abstützelements auch das Verriegelungsspiel zunimmt.Such a support element is derived from that considered to be generic DE 196 04 866 A1. On the one hand it can be seen that only one piston is provided as a lock. Because of this, there is a coupling case always the risk of the inner element tilting towards the outer part. Furthermore it is clear to the person skilled in the art that a relatively large pressure is present in the coupling area is present, which leads to, for example, that over the operating period of the support element also increases the locking play.

Zum anderen ist festzustellen, dass die im Innenelement angeordnete hydraulische Spielausgleichseinrichtung sowie der vorgenannte Kolben separate Zuleitungen zu deren Versorgung bzw. Beaufschlagung, ausgehend von einer Aufnahme im Zylinderkopf für das Abstützelement, haben. Diese zweiflutige Versorgung ist aufwändig und teuer. Gerade bei einem nachträglichen Einbau des schaltbaren Abstützelements in einen Zylinderkopf für bisher ausgeführte, nichtschaltbare Abstützelemente müssen separate Bohrungen etc. eingebracht werden.On the other hand, it should be noted that the hydraulic Backlash compensation device and the aforementioned piston separate feed lines for their supply or loading, based on an admission in the cylinder head for the support element. This double supply is complex and expensive. Especially when retrofitting the switchable support element in a cylinder head for previously executed, Non-switchable support elements must be drilled separately become.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es daher, ein schaltbares Abstützelement der vorgenannten Art zu schaffen, bei welchem die zitierten Nachteile beseitigt sind.The object of the invention is therefore a switchable support element of the aforementioned To create a way in which the disadvantages cited are eliminated.

Zusammenfassung der ErfindungSummary of the invention

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass abschnittsweise gemeinsame Zuleitungen appliziert sind, die von der Mantelfläche des Außenteils ausgehen, wobei deren vereinigter Bereich aus zwei sich diametral gegenüber liegenden Durchtritten im Außenteil sowie der radial innen folgenden Aufnahme besteht, die als Umlaufnut hergestellt ist, wobei die Aufnahme von den Durchtritten geschnitten und gleichzeitig als Druckraum für das Hydraulikmittel zur Verlagerung der Koppelmittel in das Innenelement ausgebildet ist, wobei von der Aufnahme wenigstens ein Pfad als separate Zuleitung des Hydraulikmittels zu der Spielausgleichseinrichtung wegführt, wobei zwei Kolben als Koppelmittel vorgesehen sind, die in einer Radialbohrung des Innenelements verlaufen, axial voneinander weg durch Druckfedermittel beaufschlagt und zu den Durchtritten in Flucht sind und wobei das Innenelement frei rotationsbeweglich im Außenteil verläuft.According to the invention, this object is achieved in that in sections common supply lines are applied by the outer surface of the outer part go out, the united area of two diametrically opposite horizontal passages in the outer part and the radially inner ones Recording consists, which is made as a circulation groove, the inclusion of cut the passage and at the same time as a pressure chamber for the hydraulic medium is designed to shift the coupling means into the inner element, wherein at least one path from the receptacle as a separate feed line of the hydraulic medium leads to the lash adjuster, with two pistons as Coupling means are provided in a radial bore of the inner element run, axially away from each other by pressure spring means and closed the passages are in alignment and the inner element is freely rotatable runs in the outer part.

Hierdurch sind die eingangs zitierten Nachteile eliminiert. Somit kann beispielsweise auf die Zuführung im Zylinderkopf zu der Aufnahme des Abstützelements zurückgegriffen werden, die bisher ohnehin zur Versorgung der hydraulischen Spielausgleichseinrichtung vorgesehen war. Aufwändige Änderungen an bisher ausgeführten Zylinderköpfen erübrigen sich. Gleichzeitig ist durch die Kopplung über die zwei sich diametral gegenüberliegenden Kolben eine unnötig hohe Bauteilbelastung im Koppelfall vermieden. Des weiteren wird festgestellt, dass durch das erfindungsgemäß frei rotationsbewegliche Innenelement im Außenteil zusätzliche Verdrehsicherungsmaßnahmen, die einen erhöhten Fertigungsaufwand bedeuten, entfallen.This eliminates the disadvantages cited at the beginning. Thus, for example on the feed in the cylinder head for receiving the support element to be used, which have been used to supply the hydraulic anyway Match compensation facility was provided. Elaborate changes There is no need for cylinder heads that have been implemented so far. At the same time by coupling via the two diametrically opposite pistons an unnecessarily high component load in the coupling case avoided. Furthermore, found that the inner element freely rotatable according to the invention in the outer part additional anti-rotation measures, which one means increased production costs are eliminated.

Besonders vorteilhaft ist es, wenn gleichzeitig am Außenteil auf Verdrehsicherungsmaßnahmen verzichtet wird. Somit kann das Außenteil in einer beliebigen Verdrehstellung in die entsprechende Aufnahme des Zylinderkopfes eingebaut werden. Hierfür hat, wie es Gegenstand eines weiteren Unteranspruchs ist, die äußere Mantelfläche des Außenteils eine Ringnut, die gemäß einer weiteren Konkretisierung der Erfindung beispielsweise axial oberhalb der Aufnahme angeordnet sein kann. Es ist jedoch auch vorgesehen, die Ringnut auf einer Höhe der Durchtritte zu positionieren. Von der Ringnut führt zweckmäßigerweise je ein Kanal zu dem jeweiligen Durchtritt. Alternativ hierzu kann es auch vorgesehen sein, am Ende der entsprechenden Zuleitung des Zylinderkopfes in der Aufnahme eine Ringnut anzuordnen, wodurch dann auf die Ringnut im Außenteil verzichtet werden kann. It is particularly advantageous if, at the same time, anti-rotation measures are taken on the outer part is waived. Thus, the outer part can be in any Twist position installed in the corresponding holder of the cylinder head become. For this, as is the subject of a further subclaim, the outer lateral surface of the outer part an annular groove, which according to another Specification of the invention, for example axially above the receptacle can be arranged. However, it is also provided that the annular groove on a Position the height of the passages. Appropriately leads from the annular groove one channel for each passage. Alternatively, it can be provided at the end of the corresponding supply line to the cylinder head Arrange an annular groove in the receptacle, which then on the annular groove in Outer part can be dispensed with.

Summa summarum sind somit als gemeinsame Zuleitung im Abstützelement die Ringnut im Außenteil mit den Kanälen, die Durchtritte und die als Umlaufnut ausgebildete Aufnahme in der Bohrung des Außenteils anzusehen.All in all, they are a common supply line in the support element the ring groove in the outer part with the channels, the passages and as a circumferential groove trained recording in the bore of the outer part to look at.

Anstelle der Kolben als Koppelmittel können auch andere einen Form- bzw. einen Form-Kraftschluß erzeugende Elemente vorgesehen sein, so auch Nadeln, Klinken, Kugeln und ähnliches.Instead of the pistons as coupling means, other shapes or elements that generate a form-fit connection, such as needles, Jacks, balls and the like.

Aufgrund der in Fortbildung der Erfindung vorgesehenen Abflachung an der Unterseite der Kolben als Koppelmittel ist die Flächenpressung im Koppelbereich (Ringfläche der Aufnahme) gesenkt.Because of the flattening provided in the invention The underside of the pistons as a coupling agent is the surface pressure in the coupling area (Ring surface of the receptacle) lowered.

Ein weiterer Unteranspruch bezieht sich auf eine zweckmäßige Ausbildung des Pfades zur Spielausgleichseinrichtung. Dabei soll dieser Pfad, ausgehend von einer Oberseite der Aufnahme, beispielsweise als Längskanal am Außenmantel des Innenelements ausgebildet sein. Dieser kann auch spiralförmig am Außenmantel steigen. An seinem oberen Ende mündet der Längskanal in eine Querbohrung oder ähnliches als weiterer Bestandteil des Pfades durch das Innenelement. Von dort wird das Hydraulikmittel weiter zu der hydraulischen Spielausgleichseinrichtung in bekannter Art und Weise geführt. Ggf. kann der Pfad zu der Spielausgleichseinrichtung, ausgehend von der Aufnahme, auch gleich direkt durch das Innenelement in Richtung zur Spielausgleichseinrichtung geführt werden.Another subclaim relates to an appropriate training of Paths to the game compensation facility. This path should start from an upper side of the receptacle, for example as a longitudinal channel on the outer jacket of the inner element. This can also be spirally on the outer jacket climb. At its upper end, the longitudinal channel opens into one Cross drilling or the like as a further part of the path through the Inner element. From there, the hydraulic fluid becomes hydraulic Match compensation device performed in a known manner. Possibly. can he Path to the game balancer, starting from the recording, too directly through the inner element towards the play compensation device be performed.

Des weiteren ist es vorgesehen, durch einen radial nach innen weisenden Abschnitt einer oberen Stirnseite des Außenteils, einen Höhenanschlag für das Innenelement zu schaffen. Dieser Höhenanschlag dient gleichzeitig als Verliersicherung für das Innenelement. Über den nach innen weisenden Abschnitt kann ein Verriegelungsspiel der Kolben als Koppelmittel in der Aufnahme eingestellt werden. Denkbar ist es an dieser Stelle jedoch auch, zur Einstellung des Verriegelungsspiels separate Einlegescheiben oder ähnliches im vorgenannten Bereich zu applizieren bzw. die Kolben selbst zu gruppieren. Auch ist es vorgesehen, an einem der Elemente (Außenteil / Innenelement) einen Einstich zu realisieren, in welchem ein Sicherungsring o. ä., den Einstich entsprechend überragend, angeordnet ist. Dieser Sicherungsring o. ä. kommuniziert dann mit entsprechend ausgeführten Anschlagflächen am Gegenteil.Furthermore, there is provision for a section pointing radially inwards an upper end face of the outer part, a height stop for the To create interior element. This height stop also serves as a protection against loss for the interior element. Over the inward section can a locking game of the piston set as a coupling means in the recording become. At this point, however, it is also conceivable for adjustment of the locking game separate washers or the like in the aforementioned Apply area or group the pistons themselves. Is too it provided a puncture on one of the elements (outer part / inner element) to realize in which a circlip or the like, the puncture accordingly outstanding, is arranged. This circlip or the like communicates then with correspondingly designed stop surfaces on the opposite.

Prinzipiell sind die erfindungsgemäßen Maßnahmen auch bei schaltbaren Rollenstößeln anwendbar, wobei dann lediglich das Außenteil nicht frei rotationsbeweglich ausgebildet ist und der Kopf des Innenelements auf eine Stößelstange einwirkt.In principle, the measures according to the invention are also applicable to switchable roller tappets applicable, in which case only the outer part is not freely rotatable is formed and the head of the inner element on a push rod acts.

Anstelle des genannten Hydraulikmittels sind Servomittel verschiedenster Art zur Beaufschlagung der Koppelmittel einsetzbar.Instead of the hydraulic fluid mentioned there are various types of servo fluid can be used to apply coupling material.

Kurze Beschreibung der ZeichnungBrief description of the drawing

Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert.The invention is expediently explained in more detail with reference to the drawing.

Es zeigt:

Figur 1
in einem Längsschnitt ein erfindungsgemäßes Abstützelement mit Koppelmitteln und
Figur 2
einen Längsschnitt wie vorgenannt, jedoch um 90° gedreht.
It shows:
Figure 1
in a longitudinal section an inventive support element with coupling means and
Figure 2
a longitudinal section as mentioned above, but rotated by 90 °.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Dargestellt ist ein schaltbares Abstützelement 1 für einen Ventiltrieb einer Brennkraftmaschine. Dieses hat ein Außenteil 3, in dessen Bohrung 4 axial beweglich ein Innenelement 5 eingebaut ist. Das Außenteil 3 ist über seine äußere Mantelfläche 2 in eine Aufnahme eines Zylinderkopfes einer Brennkraftmaschine einbaubar. Das Innenelement 5 ist mit einer hydraulischen Spielausgleichseinrichtung 7 an sich bekannter Bauart versehen. Es überragt mit seinem Kopf 6 eine obere Stirnseite 23 des Außenteils 3. Auf dem Kopf 6 ist einenends ein hebelartiger Nockenfolger abstützbar.A switchable support element 1 for a valve train is shown Internal combustion engine. This has an outer part 3, in the bore 4 axially an inner element 5 is movably installed. The outer part 3 is about his outer lateral surface 2 in a receptacle of a cylinder head of an internal combustion engine mountable. The inner element 5 is hydraulic Match compensation device 7 provided in a known type. It towers over with its head 6 an upper end face 23 of the outer part 3. On the head 6 a lever-like cam follower can be supported at one end.

Innerhalb der Bohrung 4 hat das Innenelement 5 eine Radialbohrung 13. Diese kann ggf. auch einen bogensehnenartigen oder windschiefen Verlauf haben.Inside the bore 4, the inner element 5 has a radial bore 13. This may also have an arches or skewed course.

In der Radialbohrung 13 sind zwei sich diametral gegenüberliegende Kolben als Koppelmittel 8 angeordnet. Diese werden radial nach außen über ein Druckfedermittel 14 beaufschlagt. Im Entkoppelzustand (zeichnerisch nicht dargestellt) verlaufen die Koppelmittel 8 vollständig innerhalb ihrer Radialbohrung 13.In the radial bore 13 are two diametrically opposite pistons arranged as coupling means 8. These are radially outward over a Pressure spring means 14 acted upon. In the uncoupled state (not in the drawing shown), the coupling means 8 run completely within their radial bore 13th

Die Koppelmittel 8 haben, ausgehend von ihrer radial äußeren Stirnseite 17, an ihrer Unterseite 18 je eine Abflachung 19. Über diese liegen sie, wie aus Figur 1 hervorgeht, im durch Druckfederkraft erzeugten Koppelfall auf einer Ringfläche 20 einer Aufnahme 9 innerhalb der Bohrung 4 des Außenteils 3. Auf eine Verdrehsicherung des Innenelements 5 zum Außenteil 3 ist verzichtet worden, da die Aufnahme 9 komplett umläuft.The coupling means 8 have, starting from their radially outer end face 17 each of their undersides 18 has a flattening 19. They lie over them, as in FIG 1 emerges, in the coupling case generated by compression spring force on an annular surface 20 of a receptacle 9 within the bore 4 of the outer part 3. On a Protection against rotation of the inner element 5 to the outer part 3 has been dispensed with, since the recording 9 revolves completely.

Wie in den Figuren 1, 2 offenbart, ist die obere Stirnseite 23 des Außenteils 3 mit einem radial nach innen weisenden Abschnitt 25 versehen. Dieser kommuniziert mit einem Ringabsatz 28 einer Durchmesserverringerung 27 am Außenmantel 22 des Innenelements 5. Somit ist auf einfache Art und Weise ein Höhenanschlag des Innenelements 5 gegenüber dem Außenteil 3 geschaffen. Vorteilhafterweise wird über den eben genannten Höhenanschlag ein Spiel der Verriegelung der Koppelmittel 8 in ihrer Aufnahme 9 eingestellt.As disclosed in FIGS. 1, 2, the upper end face 23 of the outer part 3 provided with a radially inwardly facing section 25. This communicates with a ring shoulder 28 a diameter reduction 27 on the outer jacket 22 of the inner element 5. Thus is a simple Height stop of the inner element 5 with respect to the outer part 3 created. Advantageously, a game of the above-mentioned height stop Locking of the coupling means 8 set in its receptacle 9.

In der Mantelfläche 2 des Außenteils 3 ist axial oberhalb der Aufnahme 9 eine Ringnut 15 eingebracht. Von dieser führt, wie aus Figur 1 ersichtlich, je Koppelmittel 8 ein Kanal 16 zur Zuleitung von Hydraulikmittel. Klar ist, dass an die Ringnut 15 ein Kanal zur Zuleitung des Hydraulikmittels aus dem Zylinderkopf der Brennkraftmaschine herangeführt ist. In the lateral surface 2 of the outer part 3 there is an axially above the receptacle 9 Ring groove 15 introduced. From this, as can be seen from FIG. 1, each coupling means 8 a channel 16 for the supply of hydraulic medium. It is clear that to the Ring groove 15 a channel for supplying the hydraulic fluid from the cylinder head the internal combustion engine is introduced.

Gemäß der Erfindung sind abschnittsweise gemeinsame Zuleitungen zu der hydraulischen Spielausgleichseinrichtung 7 und zu den Koppelmitteln 8 ausgeführt; d.h. mit anderen Worten, dass hier lediglich eine einflutige Variante dargestellt ist. Als Bestandteil der gemeinsamen Zuleitung zählen insbesondere zu den Koppelmitteln 8 fluchtende Durchtritte 11 im Außenteil 3 für das Hydraulikmittel und die vorgenannte Aufnahme 9 selbst, die gleichzeitig auch als Druckraum ringförmiger Art zur radial nach innen gerichteten Verlagerung der Koppelmittel 8 für den Entkoppelfall dient.According to the invention, sections are common to the feed lines hydraulic lash adjuster 7 and to the coupling means 8; i.e. in other words, only a single-flow variant is shown here is. As part of the common supply line include in particular the coupling means 8 aligned passages 11 in the outer part 3 for the hydraulic medium and the aforementioned recording 9 itself, which at the same time as Pressure chamber of an annular type for the radially inward displacement of the Coupling means 8 is used for the decoupling case.

Auch bei dem in Figur 1 gezeigten Koppelfall der Koppelmittel 8 ist garantiert, dass stets eine ausreichend große Menge an Hydraulikmittel zur Spielausgleichseinrichtung 7 geleitet werden kann. Dies ist dadurch realisiert, dass in Umfangsrichtung gesehen seitlich der Koppelmittel 8 noch ein ausreichend großer Querschnitt an den Durchtritten 11 freigegeben ist.Even with the coupling case 8 shown in FIG. 1, the coupling means 8 is guaranteed that there is always a sufficient amount of hydraulic fluid for the lash adjuster 7 can be directed. This is realized in that Seen from the side of the coupling means 8, a circumferential direction is still sufficient large cross section at the passages 11 is released.

Wie aus Figur 2 hervorgeht, ist von der Aufnahme 9 weg ein Steigkanal 21 am Außenmantel 22 des Innenelements 5 appliziert. Dieser geht endseitig in eine Querbohrung 24 über, die dann mittelbar und in dem Fachmann geläufiger Art und Weise zu der hydraulischen Spielausgleichseinrichtung 7 führt. Ggf. können auch mehrere umfangsverteilte Steigkanäle 21 vorgesehen sein. Auch müssen diese nicht, wie zeichnerisch dargestellt, umfangsversetzt zu den Koppelmitteln 8 ausgebildet sein. As can be seen from FIG. 2, a riser channel 21 is located away from the receptacle 9 Outer jacket 22 of the inner element 5 applied. This goes into one at the end Cross bore 24, which is then indirect and in the art familiar and leads to the hydraulic lash adjuster 7. Possibly. can several circumferentially distributed risers 21 may also be provided. Also they do not have to be circumferentially offset from the coupling means, as shown in the drawing 8 be formed.

Liste der BezugszahlenList of reference numbers

11
Abstützelementsupporting
22
Mantelflächelateral surface
33
Außenteilouter part
44
Bohrungdrilling
55
Innenelementinner element
66
Kopfhead
77
SpielausgleichseinrichtungLash adjuster
88th
Koppelmittelcoupling means
99
Aufnahmeadmission
1010
Zuleitungsupply
1111
Durchtrittpassage
1212
Pfadpath
1313
Radialbohrungradial bore
1414
DruckfedermittelSpring means
1515
Ringnutring groove
1616
Kanalchannel
1717
Stirnseitefront
1818
Unterseitebottom
1919
Abflachungflattening
2020
Ringflächering surface
2121
Steigkanalrising channel
2222
Außenmantelouter sheath
2323
Stirnseitefront
2424
Querbohrungcross hole
2525
Abschnittsection
2626
Stirnseitefront
2727
DurchmesserverringerungDiameter reduction
2828
Ringabsatzannular shoulder

Claims (9)

Schaltbares Abstützelement (1) für einen Ventiltrieb einer Brennkraftmaschine, mit einem über dessen äußere Mantelfläche (2) in einer Aufnahme einer Brennkraftmaschine anordenbaren Außenteil (3), in dessen Bohrung (4) ein axial bewegliches Innenelement (5) mit einem Kopf (6) zur einenendigen Abstützung eines Nockenfolgers und mit einer hydraulischen Spielausgleichseinrichtung (7) verläuft, wobei das Außenteil (3) und das Innenelement (5) in einer axial entfernten Relativstellung über Koppelmittel (8) wahlweise miteinander koppelbar sind, die im Entkoppelfall im Innenelement (5) und im Koppelfall abschnittsweise in einer Aufnahme (9) der Bohrung (4) des Außenteils (3) verlaufen und wobei Zuleitungen (10) für Hydraulikmittel zu den Koppelmitteln (8) und zu der Spielausgleichseinrichtung (7) vorgesehen sind, dadurch gekennzeichnet, daß abschnittsweise gemeinsame Zuleitungen appliziert sind, die von der Mantelfläche (2) des Außenteils (3) ausgehen, wobei deren vereinigter Bereich aus zwei sich diametral gegenüber liegenden Durchtritten (11) im Außenteil (3) sowie der radial innen folgenden Aufnahme (9) besteht, die als Umlaufnut hergestellt ist, wobei die Aufnahme (9) von den Durchtritten (11) geschnitten und gleichzeitig als Druckraum für das Hydraulikmittel zur Verlagerung der Koppelmittel (8) in das Innenelement (5) ausgebildet ist, wobei von der Aufnahme (9) wenigstens ein Pfad (12) als separate Zuleitung des Hydraulikmittels zu der Spielausgleichseinrichtung (7) wegführt, wobei zwei Kolben als Koppelmittel (8) vorgesehen sind, die in einer Radialbohrung (13) des Innenelements (5) verlaufen, axial voneinander weg durch Druckfedermittel (14) beaufschlagt und zu den Durchtritten (11) in Flucht sind und wobei das Innenelement (5) frei rotationsbeweglich im Außenteil (3) verläuft.Switchable support element (1) for a valve train of an internal combustion engine, with an outer part (3) which can be arranged in a receptacle of an internal combustion engine via its outer lateral surface (2), and an axially movable inner element (5) with a head (6) in its bore (4) for one-end support of a cam follower and with a hydraulic lash adjuster (7), the outer part (3) and the inner element (5) in an axially distant relative position can optionally be coupled to one another via coupling means (8), which in the decoupling case in the inner element (5) and in the case of coupling in sections in a receptacle (9) of the bore (4) of the outer part (3) and wherein supply lines (10) for hydraulic medium to the coupling means (8) and to the play compensation device (7) are provided, characterized in that in sections common supply lines are applied, which start from the outer surface (2) of the outer part (3), the combined B It consists of two diametrically opposite passages (11) in the outer part (3) and the radially inner following receptacle (9), which is made as a circumferential groove, the receptacle (9) being cut by the passages (11) and at the same time as a pressure chamber is designed for the hydraulic medium for displacing the coupling means (8) into the inner element (5), at least one path (12) leading away from the receptacle (9) as a separate feed line of the hydraulic medium to the play compensation device (7), two pistons as coupling means (8) are provided, which run in a radial bore (13) of the inner element (5), act axially away from each other by pressure spring means (14) and are in alignment with the passages (11) and the inner element (5) is freely rotatable in the outer part (3) runs. Abstützelement nach Anspruch 1, dadurch gekennzeichnet, daß das Außenteil (3) so ausgebildet ist, daß es frei rotationsbeweglich die Aufnahme der Brennkraftmaschine einsetzbar ist.Support element according to claim 1, characterized in that the outer part (3) is designed such that the receptacle of the internal combustion engine can be freely rotated. Abstützelement nach Anspruch 2, dadurch gekennzeichnet, daß die äußere Mantelfläche (2) des Außenteils (3) eine Ringnut (15) hat, welche mit dem jeweiligen Durchtritt (11) in Fluidverbindung steht.Support element according to claim 2, characterized in that the outer lateral surface (2) of the outer part (3) has an annular groove (15) which is in fluid communication with the respective passage (11). Abstützelement nach Anspruch 3, dadurch gekennzeichnet, daß die Ringnut (15) axial oberhalb der Aufnahme (9) im Außenteil (3) verläuft, wobei von dieser ein Kanal (16) zu dem jeweiligen Durchtritt (11) als Fluidverbindung führt.Support element according to claim 3, characterized in that the annular groove (15) extends axially above the receptacle (9) in the outer part (3), a channel (16) leading from the latter to the respective passage (11) as a fluid connection. Abstützelement nach Anspruch 1, dadurch gekennzeichnet, daß die Kolben als Koppelmittel (8), ausgehend von ihrer radial äußeren Stirnseite (17), an ihrer Unterseite (18) eine Abflachung (19) haben, über welche sie im Koppelfall auf einer zugewandten Ringfläche (20) der Aufnahme (9) liegen.Support element according to claim 1, characterized in that the pistons as coupling means (8), starting from their radially outer end face (17), have a flattened portion (19) on their underside (18), via which they are coupled on a facing ring surface ( 20) of the receptacle (9). Abstützelement nach Anspruch 1, dadurch gekennzeichnet, daß der Pfad (12) zu der Spielausgleichseinrichtung (7) aus einem Steigkanal (21) wie einem Längskanal am Außenmantel (22) des Innenelements (5) ausgebildet ist, welcher axial unterhalb einer oberen Stirnseite (23) des Außenteils (3) in eine Querbohrung (24) als weiterer Bestandteil des Pfades (12) durch das Innenelement (5) wenigstens mittelbar zu der hydraulischen Spielausgleichseinrichtung (7) übergeht. Support element according to claim 1, characterized in that the path (12) to the play compensation device (7) is formed from a riser channel (21) such as a longitudinal channel on the outer jacket (22) of the inner element (5), which is axially below an upper end face (23 ) of the outer part (3) in a transverse bore (24) as a further component of the path (12) through the inner element (5) at least indirectly to the hydraulic lash adjuster (7). Abstützelement nach Anspruch 1, dadurch gekennzeichnet, daß eine obere Stirnseite (23) des Außenteils (3) einen radial nach innen weisenden Abschnitt (25) aufweist, an welchem das Innenelement (5) einen Höhenanschlag erfährt.Support element according to claim 1, characterized in that an upper end face (23) of the outer part (3) has a radially inwardly pointing section (25), on which the inner element (5) experiences a height stop. Abstützelement nach Anspruch 7, dadurch gekennzeichnet, daß der nach innen weisende Abschnitt (25) als Ringkragen hergestellt ist, der wahlweise durch Bördeln erzielt ist, wobei ein Außenmantel (22) des Innenelements (5), ausgehend von dessen oberer Stirnseite (26), eine Durchmesserverringerung (27) hat, deren Ringabsatz (28) an dem nach innen weisenden Abschnitt (25) den Höhenanschlag erfährt.Support element according to claim 7, characterized in that the inward-facing section (25) is produced as an annular collar, which is optionally achieved by flanging, an outer jacket (22) of the inner element (5) starting from the upper end face (26) thereof, has a diameter reduction (27), the ring shoulder (28) of which on the inward-facing section (25) experiences the height stop. Abstützelement nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß über den Höhenanschlag oder im Bereich des Höhenanschlags ein Verriegelungsspiel der Kolben als Koppelmittel (8) in der Aufnahme (9) eingestellt ist.Support element according to claim 7 or 8, characterized in that a locking play of the pistons is set as coupling means (8) in the receptacle (9) via the height stop or in the region of the height stop.
EP03021704A 2002-10-15 2003-09-25 Disconnectable supporting element for valve drive in an internal combustion engine Expired - Lifetime EP1411214B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10247949 2002-10-15
DE10247949A DE10247949A1 (en) 2002-10-15 2002-10-15 Switchable support element for a valve train of an internal combustion engine

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EP1411214A3 EP1411214A3 (en) 2007-12-26
EP1411214B1 EP1411214B1 (en) 2010-04-21

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AT (1) ATE465327T1 (en)
DE (2) DE10247949A1 (en)

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WO2006037422A1 (en) * 2004-10-05 2006-04-13 Schaeffler Kg Variable valve drive for an internal combustion engine
EP1881166A1 (en) * 2006-07-21 2008-01-23 Schaeffler KG Switchable valve operating mechanism for a combustion engine
DE102007002787A1 (en) 2007-01-18 2008-07-24 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102007041929A1 (en) 2007-09-04 2009-03-05 Schaeffler Kg Shiftable support unit for e.g. hydraulic compensation of valve clearance in valve operating mechanism of internal combustion engine, has end stop implemented as separately formed stop unit that exhibits stop surface on radial projection
DE102007041844A1 (en) 2007-09-04 2009-03-05 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102007041928A1 (en) 2007-09-04 2009-03-05 Schaeffler Kg Switchable supporting element for valve drive of internal-combustion engine, comprises outer element and inner element arranged in internal combustion engine in rotating manner
WO2009053223A1 (en) * 2007-10-26 2009-04-30 Schaeffler Kg Reciprocating internal combustion engine with engine brake and additional opening of an exhaust valve

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DE102007011892A1 (en) 2007-03-13 2008-09-18 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102007037332A1 (en) 2007-08-08 2009-02-12 Daimler Ag Switchable support device for a valve train of an internal combustion engine
DE102008050781A1 (en) * 2008-10-08 2010-04-15 Schaeffler Kg Adjustable supporting element for valve gear of internal-combustion engine, has flat surface for representing anti-twist device at outer casing, and inner element whose passage finds attachment over outer casing at axially driven position
DE102009037496A1 (en) 2009-08-13 2011-02-17 Schaeffler Technologies Gmbh & Co. Kg Valve gear of an internal combustion engine

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EP0351033A1 (en) * 1988-07-13 1990-01-17 Fuji Oozx Inc. Hydraulic valve lash adjuster
DE19500575A1 (en) * 1995-01-11 1996-07-18 Schaeffler Waelzlager Kg Switchable support element
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037422A1 (en) * 2004-10-05 2006-04-13 Schaeffler Kg Variable valve drive for an internal combustion engine
EP1881166A1 (en) * 2006-07-21 2008-01-23 Schaeffler KG Switchable valve operating mechanism for a combustion engine
DE102007002787A1 (en) 2007-01-18 2008-07-24 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102007041929A1 (en) 2007-09-04 2009-03-05 Schaeffler Kg Shiftable support unit for e.g. hydraulic compensation of valve clearance in valve operating mechanism of internal combustion engine, has end stop implemented as separately formed stop unit that exhibits stop surface on radial projection
DE102007041844A1 (en) 2007-09-04 2009-03-05 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102007041928A1 (en) 2007-09-04 2009-03-05 Schaeffler Kg Switchable supporting element for valve drive of internal-combustion engine, comprises outer element and inner element arranged in internal combustion engine in rotating manner
WO2009030564A2 (en) * 2007-09-04 2009-03-12 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
WO2009030564A3 (en) * 2007-09-04 2009-05-22 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
WO2009053223A1 (en) * 2007-10-26 2009-04-30 Schaeffler Kg Reciprocating internal combustion engine with engine brake and additional opening of an exhaust valve
US8387590B2 (en) 2007-10-26 2013-03-05 Schaeffler Technologies AG & Co. KG Reciprocating-piston internal combustion engine with engine brake and additional opening of an exhaust valve

Also Published As

Publication number Publication date
EP1411214B1 (en) 2010-04-21
ATE465327T1 (en) 2010-05-15
DE50312638D1 (en) 2010-06-02
DE10247949A1 (en) 2004-04-29
EP1411214A3 (en) 2007-12-26

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