EP1564383A1 - Hydraulic supporting element - Google Patents

Hydraulic supporting element Download PDF

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Publication number
EP1564383A1
EP1564383A1 EP05001645A EP05001645A EP1564383A1 EP 1564383 A1 EP1564383 A1 EP 1564383A1 EP 05001645 A EP05001645 A EP 05001645A EP 05001645 A EP05001645 A EP 05001645A EP 1564383 A1 EP1564383 A1 EP 1564383A1
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EP
European Patent Office
Prior art keywords
pressure piston
passage
hydraulic
housing
supporting element
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
EP05001645A
Other languages
German (de)
French (fr)
Other versions
EP1564383B1 (en
Inventor
Wolfgang Mayer
Harald Smola
Benedikt Dr. Klaus
Christian Dr. Kunze
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.)
Bayerische Motoren Werke AG
IHO Holding GmbH and Co KG
Original Assignee
Bayerische Motoren Werke AG
INA Schaeffler KG
Schaeffler KG
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Publication date
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Publication of EP1564383A1 publication Critical patent/EP1564383A1/en
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Publication of EP1564383B1 publication Critical patent/EP1564383B1/en
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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
    • 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
    • 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
    • F01L1/245—Hydraulic tappets

Definitions

  • the invention relates to a hydraulic support element for a valve train an internal combustion engine, with a hollow cylindrical housing, which with his outer jacket into a receptacle of a cylinder head of the internal combustion engine can be installed and in its bore an axially movable pressure piston picks up which pressure piston with its head an edge of the housing surmounted, wherein between a head face facing away from the Pressure piston and a bottom of the housing, a high pressure chamber for the Hydraulic means is formed, which by a direction towards this opening and attached to the end face check valve is closed, wherein the High-pressure chamber from a reservoir enclosed by the pressure piston is fed via the check valve with hydraulic fluid and wherein the housing at least one radial passage for the hydraulic fluid from the cylinder head has, the radially inward with at least one axially overlying Passage in the pressure piston in the reservoir is in fluid communication.
  • Such a support element is previously known from DE 195 07 240 A1.
  • the Hydraulic fluid is discharged directly from the passage in the pressure piston into the reservoir, above the end face of the pressure piston with the check valve, directed.
  • the Hydraulic fluid is discharged directly from the passage in the pressure piston into the reservoir, above the end face of the pressure piston with the check valve, directed.
  • the direct inflow of the hydraulic fluid into the reservoir of the pressure piston the amount of hydraulic fluid already accumulated therein is always re-entangled and thus, although possibly already degassed or "calmed down” again with air bubbles or oil foam mixed.
  • the object of the invention is therefore to provide a supporting element of the aforementioned type in which eliminates the cited disadvantages by simple means are.
  • two diametrically opposite ventilation holes be applied, so that even at an oblique installation of the hydraulic Supporting element is always guaranteed that at least one vent hole seen in the direction of gravity is relatively high up.
  • a channel can be provided. However, it is more appropriate here to arrange circumferential annular channel, so that a relatively large amount of hydraulic fluid can be accumulated in the support.
  • a simple measure of attachment of the deflection sleeve on the inner shell the pressure piston is the subject of another subclaim.
  • the deflection sleeve should be made a lightweight material such as sheet metal.
  • the annular groove in the outer jacket of the pressure piston with the passage can be quite easy to manufacture. Thus, a rotation and location assignment is unnecessary the passage to the radial passage.
  • the housing has a pot-like geometry and is in Area of its underside closed by a floor. It can, however be formed open, so that then the high-pressure chamber at one Side is limited by a reason of the bore of the cylinder head.
  • the figure discloses a hydraulic support element 1, as is known in the art is known per se from its structure and the mode of action.
  • the support element 1 has a hollow cylindrical housing 2. This runs via its outer shell 3 fixed in a receptacle, not shown a Cylinder head of the internal combustion engine. This is also on a slope installation thought. In a bore 4 of the housing 2 is axially movable thereto a pressure piston 5 thin-walled type added. This pressure piston 5 surmounted with its head 6 an edge 7 of the housing. 2
  • a high-pressure chamber 10 generated for the hydraulic fluid.
  • the valve body in the direction of the end face 8 is spring-loaded.
  • Axially above the end face 8 is from the pressure piston 5, a reservoir 12 for Hydraulic fluid included.
  • the high-pressure chamber 10 from the Reservoir 12 via the check valve 11, if necessary, with hydraulic fluid provided.
  • the housing 2 is penetrated by a radial passage 13 for the hydraulic fluid.
  • Radial passage 13 the hydraulic fluid is further in an annular groove 20 in the outer jacket 21 of the pressure piston 5 passed.
  • This annular groove 20 is axially above the radial passage 13 and has at least one passage 14 in the interior of the pressure piston 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Check Valves (AREA)

Abstract

Hydraulic support element (1) comprises a cylindrical housing (2) with a partial amount of a hydraulic agent arranged directly in front of a non-return valve (11), and ventilating holes (16) arranged axially above a passage (14). Preferred Features: The support element also has a bulkhead (15) formed as a deviating sleeve (15a) for the hydraulic agent and axially fixed to the inner casing (17) of a pressure plunger (5) below the passage.

Description

Geblet der ErfindungGet the invention

Die Erfindung betrifft ein hydraulisches Abstützelement für einen Ventiltrieb einer Brennkraftmaschine, mit einem hohlzylindrischen Gehäuse, welches mit seinem Außenmantel in eine Aufnahme eines Zylinderkopfes der Brennkraftmaschine einbaubar ist und in seiner Bohrung einen axial beweglichen Druckkolben aufnimmt, welcher Druckkolben mit seinem Kopf einen Rand des Gehäuses überragt, wobei zwischen einer dem Kopf abgewandten Stirnfläche des Druckkolbens und einer Unterseite des Gehäuses ein Hochdruckraum für das Hydraulikmittel gebildet ist, der durch ein sich in Richtung zu diesem öffnendes und an der Stirnfläche befestigtes Rückschlagventil verschließbar ist, wobei der Hochdruckraum aus einem vom Druckkolben eingeschlossenen Vorratsraum über das Rückschlagventil mit Hydraulikmittel gespeist ist und wobei das Gehäuse wenigstens einen Radialdurchtritt für das Hydraulikmittel aus dem Zylinderkopf hat, der radial innen mit zumindest einem axial darüber liegenden Durchlass im Druckkolben in dessen Vorratsraum in Fluidverbindung steht. The invention relates to a hydraulic support element for a valve train an internal combustion engine, with a hollow cylindrical housing, which with his outer jacket into a receptacle of a cylinder head of the internal combustion engine can be installed and in its bore an axially movable pressure piston picks up which pressure piston with its head an edge of the housing surmounted, wherein between a head face facing away from the Pressure piston and a bottom of the housing, a high pressure chamber for the Hydraulic means is formed, which by a direction towards this opening and attached to the end face check valve is closed, wherein the High-pressure chamber from a reservoir enclosed by the pressure piston is fed via the check valve with hydraulic fluid and wherein the housing at least one radial passage for the hydraulic fluid from the cylinder head has, the radially inward with at least one axially overlying Passage in the pressure piston in the reservoir is in fluid communication.

Ein derartiges Abstützelement ist aus der DE 195 07 240 A1 vorbekannt. Das Hydraulikmittel wird direkt aus dem Durchlass im Druckkolben in den Vorratsraum, oberhalb von der Stirnfläche des Druckkolbens mit dem Rückschlagventil, geleitet. In der Praxis hat sich gezeigt, dass bei einem derartigen Abstützelement einfach gesagt zuviel Luftblasen und Ölschaum im Vorratsraum akkumuliert, so dass diese bzw. dieser unerwünscht während des Spielausgleichvorganges in den Hochdruckraum gesaugt werden. Dies führt zu einer unerwünschten Kompressibilität des Hochdruckraumes, so dass bei Nockenhub nicht der vorbestimmte Gaswechselquerschnitt zur Verfügung steht. Durch das direkte Einströmen des Hydraulikmittels in den Vorratsraum des Druckkolbens wird die darin schon akkumulierte Menge an Hydraulikmittel stets neu verwirbelt und somit, obwohl ggf. schon entgast bzw. "beruhigt", erneut mit Luftblasen bzw. Ölschaum vermischt.Such a support element is previously known from DE 195 07 240 A1. The Hydraulic fluid is discharged directly from the passage in the pressure piston into the reservoir, above the end face of the pressure piston with the check valve, directed. In practice it has been found that in such a support element simply put too much air bubbles and oil foam accumulated in the storeroom, so that this or this undesirable during the game compensation process be sucked into the high-pressure chamber. This leads to an undesirable Compressibility of the high-pressure chamber, so that when Nockenhub not the predetermined gas exchange cross section is available. By the direct inflow of the hydraulic fluid into the reservoir of the pressure piston the amount of hydraulic fluid already accumulated therein is always re-entangled and thus, although possibly already degassed or "calmed down" again with air bubbles or oil foam mixed.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es daher, ein Abstützelement der vorgenannten Art zu schaffen, bei welchem die zitierten Nachteile mit einfachen Mitteln beseitigt sind.The object of the invention is therefore to provide a supporting element of the aforementioned type in which eliminates the cited disadvantages by simple means are.

Lösung der AufgabeSolution of the task

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass

  • a) einerseits durch Schottmittel eine zumindest unmittelbar vor dem Rückschlagventil befindliche Teilmenge an Hydraulikmittel von über den Durchlass eintretendem Hydraulikmittel separiert ist und dass
  • b) andererseits axial oberhalb des Durchlasses, jedoch innerhalb des Gehäuses, der Druckkolben wenigstens eine Entlüftungsbohrung hat.
    • According to the invention, this object is achieved in that
  • a) is separated on the one hand by means of bulkhead at least immediately before the check valve located subset of hydraulic fluid from entering through the passage hydraulic fluid and that
  • b) on the other hand axially above the passage, but within the housing, the pressure piston has at least one vent hole.

    • Genau durch eine Kombination der eben genannten Maßnahmen sind die eingangs beschriebenen Nachteile wirkungsvoll vermieden. Es ist durch das vorzugsweise als Umlenkhülse ausgebildete Schottmittel einerseits vor dem Rückschlagventil ein sogenannter Tot- bzw. Ruheraum für das Hydraulikmittel dargestellt. Neu einströmende Luftblasen bzw. Ölsschaum können nicht mehr das vor dem Rückschlagventil liegende und schon "beruhigte" Hydraulikmittel neu verwirbeln und beeinflussen. Eine Teilmenge an Luftblasen und Ölschaum kann somit relativ ungestört aus der Umlenkhülse entgegen der Schwerkraftrichtung nach oben entweichen. Ein weiterer Betrag von unerwünschter Luft im Hydraulikmittelstrom wird schon vor dem eigentlichen Eintritt in das Innere der Umlenkhülse über die axial oberhalb des Durchlasses im Druckkolben liegende wenigstens eine Entlüftungsbohrung ins Freie geleitet. Genau dieser kombinatorische Effekt (Umlenkblech + Entlüftungsbohrung) führt dazu, dass der Hochdruckraum weitestgehend inkompressibel bleibt, da die unerwünschten Luftbestandteile dort nicht mehr angesaugt werden.Precisely by a combination of the measures just mentioned are the beginning described disadvantages effectively avoided. It is by the preferred designed as Umlenkhülse bulkhead on the one hand in front of the check valve a so-called dead or rest space for the hydraulic fluid shown. New incoming air bubbles or oil foam can not do this anymore before the check valve lying and already "calmed down" hydraulic fluid new swirl and influence. A subset of air bubbles and oil foam can thus relatively undisturbed from the Umlenkhülse against the direction of gravity escape to the top. Another amount of unwanted air in the Hydraulic fluid flow is already before the actual entry into the interior of Deflection sleeve over the axially above the passage in the pressure piston lying led at least one vent hole into the open air. Exactly this combinatorial Effect (deflector + vent hole) causes the high-pressure chamber remains largely incompressible because the unwanted air constituents no longer be sucked in there.

    Vorzugsweise sollen zwei sich diametral gegenüber liegende Entlüftungsbohrungen appliziert werden, so dass auch bei einem Schrägeinbau des hydraulischen Abstützelementes stets garantiert ist, dass zumindest eine Entlüftungsbohrung in Schwerkraftrichtung gesehen relativ weit oben liegt.Preferably, two diametrically opposite ventilation holes be applied, so that even at an oblique installation of the hydraulic Supporting element is always guaranteed that at least one vent hole seen in the direction of gravity is relatively high up.

    Anstelle der allumlaufenden Umlenkhülse als Schottmittel können auch andere Mittel vorgesehen sein. So sind auch einfache, in Fließrichtung hinter dem Durchlass im Druckkolben liegende, Prallbleche oder ähnliches für das Hydraulikmittel vorgesehen, so dass zumindest ein direktes Auftreffen des Hydraulikmittelstroms mit dem vor dem Rückschlagventil befindlichen und schon "beruhigten" Hydraulikmittel vermieden ist.Instead of the all-round deflection sleeve as a bulkhead can also others Means be provided. So are also simple, in the flow direction behind the Passage in the pressure piston lying baffles or the like for the hydraulic fluid provided so that at least one direct impact of the hydraulic fluid flow with the one in front of the check valve and already "calmed down" Hydraulic fluid is avoided.

    Zwar kann als Steigpfad für das Hydraulikmittel am Innenmantel des Druckkolbens ein Kanal vorgesehen werden. Zweckmäßiger ist es jedoch, hier einen umlaufenden Ringkanal anzuordnen, so dass eine relativ große Hydraulikmittelmenge im Abstützelement angehäuft werden kann. Although can be used as climbing path for the hydraulic fluid on the inner surface of the pressure piston a channel can be provided. However, it is more appropriate here to arrange circumferential annular channel, so that a relatively large amount of hydraulic fluid can be accumulated in the support.

    Eine einfache Maßnahme einer Befestigung der Umlenkhülse am Innenmantel des Druckkolbens ist Gegenstand eines weiteren Unteranspruchs. Somit kann diese beispielsweise durch Einschnappen oder Klipsen am Innenmantel des Druckkolbens befestigt werden. Alternativ hierzu bieten sich Maßnahmen wie Schweißen, Kleben, Löten o. ä. an. Vorzugsweise soll die Umlenkhülse aus einem Leichtbauwerkstoff wie Blech bestehen. Denkbar ist jedoch auch eine Kunststoffausbildung.A simple measure of attachment of the deflection sleeve on the inner shell the pressure piston is the subject of another subclaim. Thus, can This example, by snapping or clipping on the inner surface of the Pressure piston are attached. Alternatively, measures such as Welding, gluing, soldering or similar. Preferably, the deflection sleeve should be made a lightweight material such as sheet metal. However, it is also conceivable one Plastic training.

    Die Ringnut im Außenmantel des Druckkolbens mit dem Durchlass lässt sich recht einfach fertigen. Somit erübrigt sich eine Verdrehsicherung und Lagezuordnung des Durchlasses zum Radialdurchtritt.The annular groove in the outer jacket of the pressure piston with the passage can be quite easy to manufacture. Thus, a rotation and location assignment is unnecessary the passage to the radial passage.

    Zweckmäßigerweise hat das Gehäuse eine topfartige Geometrie und ist im Bereich seiner Unterseite durch einen Boden verschlossen. Es kann jedoch auch offen ausgebildet werden, so dass dann der Hochdruckraum an einer Seite durch einen Grund der Bohrung des Zylinderkopfes begrenzt ist.Conveniently, the housing has a pot-like geometry and is in Area of its underside closed by a floor. It can, however be formed open, so that then the high-pressure chamber at one Side is limited by a reason of the bore of the cylinder head.

    Kurze Beschreibung der ZeichnungShort description of the drawing

    Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert. Es zeigt die einzige Figur in einem Längsschnitt ein hydraulisches Abstützelement mit den erfindungsgemäßen Maßnahmen.The invention is suitably explained in more detail with reference to the drawing. It shows the only figure in a longitudinal section of a hydraulic support element with the inventive measures.

    Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

    Die Figur offenbart ein hydraulisches Abstützelement 1, so wie es der Fachwelt von seinem Aufbau und der Wirkungsweise her an sich bekannt ist.The figure discloses a hydraulic support element 1, as is known in the art is known per se from its structure and the mode of action.

    Das Abstützelement 1 hat ein hohlzylindrisches Gehäuse 2. Dieses verläuft über seinen Außenmantel 3 ortsfest in einer nicht dargestellten Aufnahme eines Zylinderkopfes der Brennkraftmaschine. Hierbei ist auch an einen Schrägeinbau gedacht. In einer Bohrung 4 des Gehäuses 2 ist axial beweglich hierzu ein Druckkolben 5 dünnwandiger Bauart aufgenommen. Dieser Druckkolben 5 überragt mit seinem Kopf 6 einen Rand 7 des Gehäuses 2.The support element 1 has a hollow cylindrical housing 2. This runs via its outer shell 3 fixed in a receptacle, not shown a Cylinder head of the internal combustion engine. This is also on a slope installation thought. In a bore 4 of the housing 2 is axially movable thereto a pressure piston 5 thin-walled type added. This pressure piston 5 surmounted with its head 6 an edge 7 of the housing. 2

    Zwischen einer dem Kopf 6 abgewandten Stirnfläche 8 (hier eine Ringfläche) des Druckkolbens 5 und einer Unterseite 9 des Gehäuses 2 ist ein Hochdruckraum 10 für das Hydraulikmittel generiert. An einer Unterseite der Stirnfläche 8 verläuft ein Rückschlagventil 11, dessen Ventilkörper in Richtung zur Stirnfläche 8 angefedert ist.Between an end face 8 remote from the head 6 (here an annular surface) the pressure piston 5 and a bottom 9 of the housing 2 is a high-pressure chamber 10 generated for the hydraulic fluid. At an underside of the end face. 8 runs a check valve 11, the valve body in the direction of the end face 8 is spring-loaded.

    Axial oberhalb der Stirnfläche 8 ist vom Druckkolben 5 ein Vorratsraum 12 für Hydraulikmittel eingeschlossen. Somit wird der Hochdruckraum 10 aus dem Vorratsraum 12 über das Rückschlagventil 11 bedarfsweise mit Hydraulikmittel versorgt.Axially above the end face 8 is from the pressure piston 5, a reservoir 12 for Hydraulic fluid included. Thus, the high-pressure chamber 10 from the Reservoir 12 via the check valve 11, if necessary, with hydraulic fluid provided.

    Zudem kann sich der Fachmann der Figur entnehmen, dass das Gehäuse 2 von einem Radialdurchtritt 13 für das Hydraulikmittel durchdrungen ist. Dieser kommuniziert mit einer Zuleitung für das Hydraulikmittel im Zylinderkopf. Vom Radialdurchtritt 13 wird das Hydraulikmittel weiter in eine Ringnut 20 im Außenmantel 21 des Druckkolbens 5 geleitet. Diese Ringnut 20 liegt axial oberhalb des Radialdurchtritts 13 und hat zumindest einen Durchlass 14 in das Innere des Druckkolbens 5.In addition, the person skilled in the figure can deduce that the housing 2 is penetrated by a radial passage 13 for the hydraulic fluid. This communicates with a supply line for the hydraulic fluid in the cylinder head. from Radial passage 13, the hydraulic fluid is further in an annular groove 20 in the outer jacket 21 of the pressure piston 5 passed. This annular groove 20 is axially above the radial passage 13 and has at least one passage 14 in the interior of the pressure piston 5.

    Gleichzeitig ist axial unterhalb des Durchlasses 14 am Innenmantel 17 ein Schottmittel 15 befestigt. Dieses ist hier als Umlenkhülse 15a ausgebildet. Somit ist, ausgehend vom Durchlass 14, ein ringförmiger Steigpfad 18 nach dem Durchlass 14 für das Hydraulikmittel gebildet.At the same time is axially below the passage 14 on the inner shell 17 a Schottmittel 15 attached. This is designed here as Umlenkhülse 15a. Consequently is, starting from the passage 14, an annular riser 18 after the Passage 14 formed for the hydraulic fluid.

    Im Bereich des Kopfes 6, an welchem das Ende eines Schlepphebels aufliegt, wird das Hydraulikmittel in einen von der Umlenkhülse 15a eingeschlossenen Innenraum 19 geleitet. Somit stellt dieser Innenraum 19 den eigentlichen Vorratsraum 12 des Druckkolbens 5 dar. Von diesem Innenraum 19 erfolgt, in an sich bekannter Art und Weise, eine Weiterleitung des Hydraulikmittels über das Rückschlagventil 11 in den Hochdruckraum 10.In the region of the head 6, on which rests the end of a finger lever, The hydraulic fluid is enclosed in one of the Umlenkhülse 15 a Interior 19 headed. Thus, this interior 19 is the actual pantry 12 of the plunger 5 is from this interior 19 takes place in known manner, a forwarding of the hydraulic fluid through the Check valve 11 in the high-pressure chamber 10th

    Zudem ist zu erkennen, dass axial oberhalb des Durchlasses 14, jedoch unterhalb des Randes 7, zwei sich diametral gegenüber liegende Entlüftungsbohrungen 16 angeordnet. Diese liegen somit im Bereich des Steigpfades 18.In addition, it can be seen that axially above the passage 14, but below of the edge 7, two diametrically opposed vent holes 16 arranged. These are thus in the range of the climbing path 18.

    Genau wegen des Einsatzes der Umlenkhülse 15a als Schottmittel 15, in Verbindung mit den vorgenannten Entlüftungsbohrungen 16, kommt es zu dem hervorragenden kombinatorischen Effekt, dass der Hochdruckraum 10 weitestgehend von Ölschaum und Luftblasen frei bleibt und das Abstützelement 1 somit bei Nockenhub nicht unerwünscht kompressibel wird.Exactly because of the use of the deflection sleeve 15a as a bulkhead 15, in conjunction with the aforementioned vent holes 16, it comes to the excellent combinatorial effect that the high-pressure chamber 10 largely of oil foam and air bubbles remains free and the support element. 1 thus not undesirable compressible at Nockenhub.

    Nach dem Einströmen des Hydraulikmittels über den Durchlass 14 im Druckkolben 5 wird schon ein erstes Quantum an Luft über die Entlüftungsbohrungen 16 mittelbar ins Freie geleitet. Gleichzeitig liegt das unmittelbar oberhalb vom Rückschlagventil 11 akkumulierte Hydraulikmittel relativ beruhigt innerhalb der Umlenkhülse 15a vor. Dies rührt daher, dass es nicht mehr durch am Radialdurchtritt 13 einströmendes Hydraulikmittel verwirbelt und somit beeinflusst wird. Sollte das über den Steigpfad 18 in den Innenraum 19 der Umlenkhülse 15a geleitete Hydraulikmittel noch Luftblasen oder gelöste Luft aufweisen, so steigt die Luft peu ä peu nach oben und beeinflusst nicht das relativ "ruhig" vorliegende Hydraulikmittel unmittelbar vor dem Rückschlagventil 11. After the inflow of hydraulic fluid through the passage 14 in the pressure piston 5 is already a first quantum of air through the vent holes 16 passed indirectly to the outside. At the same time, this is just above the Check valve 11 accumulated hydraulic fluid relatively calm within the Deflection sleeve 15a before. This is due to the fact that it is no longer through at the radial passage 13 infiltrated hydraulic fluid swirled and thus influenced becomes. Should that via the climbing path 18 in the interior 19 of the Umlenkhülse 15a directed hydraulic fluid still have air bubbles or dissolved air, so the air rises little by little and does not affect the relatively "calm" present Hydraulic means immediately before the check valve eleventh

    Liste der BezugszahlenList of reference numbers

    11
    Abstützelementsupporting
    22
    Gehäusecasing
    33
    Außenmantelouter sheath
    44
    Bohrungdrilling
    55
    Druckkolbenpressure piston
    66
    Kopfhead
    77
    Randedge
    88th
    Stirnflächeface
    99
    Unterseitebottom
    1010
    HochdruckraumHigh-pressure chamber
    1111
    Rückschlagventilcheck valve
    1212
    Vorratsraumpantry
    1313
    RadialdurchtrittRadial passage
    1414
    Durchlasspassage
    1515
    SchottmittelSchott means
    15a15a
    Umlenkhülsedeflecting
    1616
    Entlüftungsbohrungvent hole
    1717
    Innenmantelinner sheath
    1818
    SteigpfadSteig path
    1919
    Innenrauminner space
    2020
    Ringnutring groove
    2121
    Außenmantelouter sheath

    Claims (6)

    Hydraulisches Abstützelement (1) für einen Ventiltrieb einer Brennkraftmaschine, mit einem hohlzylindrischen Gehäuse (2), welches mit seinem Außenmantel (3) in eine Aufnahme eines Zylinderkopfes der Brennkraftmaschine einbaubar ist und in seiner Bohrung (4) einen axial beweglichen Druckkolben (5) aufnimmt, welcher Druckkolben (5) mit seinem Kopf (6) einen Rand (7) des Gehäuses (2) überragt, wobei zwischen einer dem Kopf (6) abgewandten Stirnfläche (8) des Druckkolbens (5) und einer Unterseite (9) des Gehäuses (2) ein Hochdruckraum (10) für das Hydraulikmittel gebildet ist, der durch ein sich in Richtung zu diesem öffnendes und an der Stirnfläche (8) befestigtes Rückschlagventil (11) verschließbar ist, wobei der Hochdruckraum (10) aus einem vom Druckkolben (5) eingeschlossenen Vorratsraum (12) über das Rückschlagventil (11) mit Hydraulikmittel gespeist ist und wobei das Gehäuse (2) wenigstens einen Radialdurchtritt (13) für das Hydraulikmittel aus dem Zylinderkopf hat, der radial innen mit zumindest einem axial darüber liegenden Durchlass (14) im Druckkolben (5) in dessen Vorratsraum (12) in Fluidverbindung steht, dadurch gekennzeichnet, dass a) einerseits durch Schottmittel (15) eine zumindest unmittelbar vor dem Rückschlagventil (11) befindliche Teilmenge an Hydraulikmittel von über den Durchlass (14) eintretendem Hydraulikmittel separiert ist und dass b) andererseits axial oberhalb des Durchlasses (14), jedoch innerhalb des Gehäuses (2), der Druckkolben (5) wenigstens eine Entlüftungsbohrung (16) hat. Hydraulic support element (1) for a valve drive of an internal combustion engine, with a hollow cylindrical housing (2), which with its outer jacket (3) can be installed in a receptacle of a cylinder head of the internal combustion engine and in its bore (4) receives an axially movable pressure piston (5) , which pressure piston (5) with its head (6) projects beyond an edge (7) of the housing (2), between an end face (8) of the pressure piston (5) facing away from the head (6) and a lower side (9) of the housing (2) a high-pressure space (10) for the hydraulic medium is formed, which can be closed by a non-return valve (11) which is fastened in the direction of this opening and on the end face (8), the high-pressure space (10) being formed by a pressure piston (5) ) enclosed reservoir (12) via the check valve (11) is fed with hydraulic fluid and wherein the housing (2) has at least one radial passage (13) for the hydraulic fluid from the cylinder head, is in fluid communication with at least one axially overlying passage (14) in the pressure piston (5) in the reservoir (12), characterized in that a) on the one hand by bulkhead means (15) is at least immediately before the check valve (11) located subset of hydraulic fluid separated by the passage (14) entering hydraulic means and that b) on the other hand axially above the passage (14), but within the housing (2), the pressure piston (5) has at least one vent hole (16). Abstützelement nach Anspruch 1, dadurch gekennzeichnet, dass zumindest zwei Entlüftungsbohrungen (16) im Druckkolben (5) vorgesehen sind, welche umfangsmäßig gleichverteilt vorliegen.Supporting element according to claim 1, characterized in that at least two venting bores (16) are provided in the pressure piston (5) which are circumferentially equally distributed. Abstützelement nach Anspruch 1, dadurch gekennzeichnet, dass das Schottmittel (15) als Umlenkhülse (15a) für das Hydraulikmittel ausgebildet ist, die axial unterhalb des Durchlasses (14) an einem Innenmantel (17) des Druckkolbens (5) dicht befestigt ist und sich bis in die Nähe dessen Kopfes (6) erstreckt, wobei zwischen der Umlenkhülse (15a) und einem Innnenmantel (17) des Druckkolbens (5) ein Steigpfad (18) für das Hydraulikmittel besteht, welches Hydraulikmittel im Bereich des Kopfes (6) in einen den eigentlichen Vorratsraum (12) bildenden Innenraum (19) der Umlenkhülse (15a) zur dessen unmittelbarer Akkumulation vor dem Rückschlagventil (11) geleitet ist.Supporting element according to claim 1, characterized in that the bulkhead means (15) is formed as Umlenkhülse (15a) for the hydraulic medium, which is tightly secured axially below the passage (14) on an inner jacket (17) of the pressure piston (5) and up in the vicinity of the head (6), wherein between the Umlenkhülse (15a) and an Innnenmantel (17) of the pressure piston (5) a climbing path (18) for the hydraulic means is provided, which hydraulic means in the region of the head (6) in a actual storage space (12) forming the interior (19) of the Umlenkhülse (15a) for its immediate accumulation in front of the check valve (11) is passed. Abstützelement nach Anspruch 3, dadurch gekennzeichnet, dass die Umlenkhülse (15a) als dünnwandiges Leichtbauteil wie als Blechteil hergestellt und am Innenmantel (17) des Druckkolbens (5) durch ein Verfahren wie Einschnappen, Schweißen oder Kleben befestigt ist.Supporting element according to claim 3, characterized in that the deflection sleeve (15a) is made as a thin-walled lightweight component such as a sheet metal part and on the inner shell (17) of the pressure piston (5) by a method such as snapping, welding or gluing. Abstützelement nach Anspruch 3, dadurch gekennzeichnet, dass der Steigpfad (18) als umlaufender Ringkanal ausgebildet ist. Supporting element according to claim 3, characterized in that the climbing path (18) is designed as a circumferential annular channel. Abstützelement nach Anspruch 1, dadurch gekennzeichnet, dass der Durchlass (14) im Druckkolben (5) in einer Ringnut (20) im Außenmantel (21) des Druckkolbens (5) liegt.Supporting element according to claim 1, characterized in that the passage (14) in the pressure piston (5) in an annular groove (20) in the outer casing (21) of the pressure piston (5).
    EP05001645A 2004-02-12 2005-02-04 Hydraulic supporting element Active EP1564383B1 (en)

    Applications Claiming Priority (2)

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    DE102004006903 2004-02-12
    DE102004006903A DE102004006903A1 (en) 2004-02-12 2004-02-12 Hydraulic support element

    Publications (2)

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    EP1564383A1 true EP1564383A1 (en) 2005-08-17
    EP1564383B1 EP1564383B1 (en) 2007-03-28

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    DE (2) DE102004006903A1 (en)

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    EP2767684A1 (en) * 2013-02-15 2014-08-20 Otics Corporation Lash adjuster
    WO2015021962A1 (en) * 2013-08-13 2015-02-19 Schaeffler Technologies Gmbh & Co. Kg Hydraulic support element
    US8973546B2 (en) 2013-02-14 2015-03-10 Otics Corporation Lash adjuster
    US9010291B2 (en) 2013-02-15 2015-04-21 Otics Corporation Lash adjuster
    US9080469B2 (en) 2013-02-14 2015-07-14 Otics Corporation Lash adjuster
    US9091186B2 (en) 2013-02-15 2015-07-28 Otics Corporation Lash adjuster
    CN110573701A (en) * 2017-05-08 2019-12-13 舍弗勒技术股份两合公司 Tappet column

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    DE102006017442A1 (en) * 2006-04-13 2007-10-18 Schaeffler Kg Hydraulic support element for a lever-like cam follower of a valve train of an internal combustion engine
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    DE102011075042A1 (en) 2011-05-02 2012-11-08 Schaeffler Technologies AG & Co. KG Hydraulic support element
    US9803518B2 (en) 2014-01-20 2017-10-31 Nittan Valve Co., Ltd. Hydraulic lash adjuster
    DE102014212272A1 (en) 2014-06-26 2015-12-31 Schaeffler Technologies AG & Co. KG supporting
    CN104131852B (en) * 2014-07-01 2017-07-07 杭州新坐标科技股份有限公司 A kind of column formula hydraulic tappet and its plunger preparation method
    DE102015203049A1 (en) 2015-02-20 2016-08-25 Schaeffler Technologies AG & Co. KG A clearance compensation device for a valve or tensioning device for a belt or chain drive
    JP6402066B2 (en) * 2015-04-02 2018-10-10 株式会社オティックス Rush adjuster
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    Also Published As

    Publication number Publication date
    US6959677B2 (en) 2005-11-01
    DE502005000508D1 (en) 2007-05-10
    EP1564383B1 (en) 2007-03-28
    DE102004006903A8 (en) 2006-01-12
    US20050178351A1 (en) 2005-08-18
    DE102004006903A1 (en) 2005-09-22

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