EP1564383B1 - Hydraulic supporting element - Google Patents

Hydraulic supporting element Download PDF

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Publication number
EP1564383B1
EP1564383B1 EP05001645A EP05001645A EP1564383B1 EP 1564383 B1 EP1564383 B1 EP 1564383B1 EP 05001645 A EP05001645 A EP 05001645A EP 05001645 A EP05001645 A EP 05001645A EP 1564383 B1 EP1564383 B1 EP 1564383B1
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EP
European Patent Office
Prior art keywords
pressure piston
hydraulic medium
piston
aperture
supporting element
Prior art date
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EP05001645A
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German (de)
French (fr)
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EP1564383A1 (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
Schaeffler KG
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Publication of EP1564383A1 publication Critical patent/EP1564383A1/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 drive of an internal combustion engine according to the preamble of patent claim 1.
  • Such a support element is known from the document DE-A-195 29 044.
  • the Umlenkhülse which is accommodated in the pressure piston, not tightly mounted on the upper piston part to allow a backflow of leakage oil to the reservoir.
  • a ring with an explosive joint between the two piston parts is additionally provided.
  • a support element is also known from the document DE-A-195 07 240.
  • the hydraulic fluid is passed there directly from the passage in the pressure piston in the reservoir, above the end face of the pressure piston with the check valve.
  • Due to the direct inflow of the hydraulic fluid into the reservoir of the pressure piston the already accumulated amount of hydraulic fluid is always re-vortexed and thus, although possibly already degassed or "calmed down” again mixed with air bubbles or oil foam.
  • the object of the invention is therefore to provide a support element of the aforementioned type, in which the cited disadvantages are eliminated by simple means.
  • this object is achieved in that the deflection sleeve is tightly secured axially below the passage to an inner jacket of the upper piston part of the pressure piston by snapping or clipping or by welding, soldering or gluing.
  • two diametrically opposite ventilation holes are to be applied, so that it is always guaranteed even with an oblique installation of the hydraulic support element that at least one vent hole seen in the direction of gravity is relatively high up.
  • a simple measure of attachment of the deflection sleeve on the inner surface of the pressure piston is that it can be fixed, for example by snapping or clipping on the inner surface of the pressure piston.
  • measures such as welding, gluing, soldering o. ⁇ .
  • the deflection sleeve should consist of a lightweight material such as sheet metal. It is also conceivable, however, a plastic training.
  • the annular groove in the outer jacket of the pressure piston with the passage can be quite easily finished. Thus, an anti-rotation and position assignment of the passage to the radial passage is unnecessary.
  • the housing has a pot-like geometry and is closed in the region of its underside by a bottom. However, it can also be formed open, so that then the high-pressure chamber is bounded on one side by a bottom of the bore of the cylinder head.
  • the figure discloses a hydraulic support element 1, as it is known in the art of its structure and the mode of action itself.
  • the support element 1 has a hollow cylindrical housing 2. This extends over its outer shell 3 fixed in a receptacle, not shown, of a cylinder head of the internal combustion engine. This is also on a slope installation thought.
  • a pressure piston 5 of thin-walled design is accommodated axially movable for this purpose. This pressure piston 5 projects beyond an edge 7 of the housing 2 with its head 6.
  • a high pressure chamber 10 is generated for the hydraulic fluid.
  • a check valve 11 On an underside of the end face 8 extends a check valve 11, the valve body is sprung in the direction of the end face 8.
  • a reservoir 12 for hydraulic means Axially above the end face 8 is enclosed by the pressure piston 5, a reservoir 12 for hydraulic means.
  • the high pressure chamber 10 is supplied from the reservoir 12 via the check valve 11, if necessary, with hydraulic fluid.
  • the housing 2 is penetrated by a radial passage 13 for the hydraulic medium.
  • the hydraulic fluid is further passed into an annular groove 20 in the outer casing 21 of the pressure piston 5.
  • This annular groove 20 lies axially above the radial passage 13 and has at least one passage 14 in the interior of the pressure piston fifth
  • a bulkhead means 15 is fixed. This is designed here as Umlenkhülse 15a.
  • an annular rising path 18 is formed after the passage 14 for the hydraulic medium.

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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)

Description

Die Erfindung betrifft ein hydraulisches Abstützelement für einen Ventiltrieb einer Brennkraftmaschine nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a hydraulic support element for a valve drive of an internal combustion engine according to the preamble of patent claim 1.

Ein derartiges Abstützelement ist aus der Druckschrift DE-A-195 29 044 bekannt. Dort ist die Umlenkhülse, welche in dem Druckkolben aufgenommen ist, an dem oberen Kolbenteil nicht dicht angebracht, um einen Rückfluss von Leckageöl zum Vorratsraum zu ermöglichen. Hierfür ist zusätzlich ein Ring mit einer Sprengfuge zwischen den beiden Kolbenteilen vorgesehen.Such a support element is known from the document DE-A-195 29 044. There, the Umlenkhülse, which is accommodated in the pressure piston, not tightly mounted on the upper piston part to allow a backflow of leakage oil to the reservoir. For this purpose, a ring with an explosive joint between the two piston parts is additionally provided.

Aus der Druckschrift EP-A-0 351 033 ist ein Abstützelement bekannt, bei welchem die Umlenkhülse in das obere Kolbenteil dicht eingepresst ist, wonach dieses und das untere Kolbenteil miteinander verschweißt werden. Dabei besteht die Gefahr, dass in dem Druckkolben Schweißpartikel in das Rückschlagventil gelangen und dessen Funktion beeinträchtigen.From the document EP-A-0 351 033 a support element is known, in which the deflection sleeve is pressed tightly into the upper piston part, after which this and the lower piston part are welded together. There is a risk that get in the pressure piston welding particles in the check valve and affect its function.

Ein Abstützelement ist auch aus der Druckschrift DE-A- 195 07 240 bekannt. Das Hydraulikmittel wird dort 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.A support element is also known from the document DE-A-195 07 240. The hydraulic fluid is passed there directly from the passage in the pressure piston in the reservoir, above the end face of the pressure piston with the check valve. In practice, it has been shown that in such a support element simply too much air bubbles and oil foam accumulates in the reservoir, so that these or these are sucked undesirably during the clearance compensation process in the high-pressure chamber. This leads to an undesirable compressibility of the high-pressure chamber, so that the predetermined gas exchange cross-section is not available during cam lift. Due to the direct inflow of the hydraulic fluid into the reservoir of the pressure piston, the already accumulated amount of hydraulic fluid is always re-vortexed and thus, although possibly already degassed or "calmed down" again mixed with air bubbles or oil foam.

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 support element of the aforementioned type, in which the cited disadvantages are eliminated by simple means.

Lösung der AufgabeSolution of the task

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Umlenkhülse axial unterhalb des Durchlasses an einem Innenmantel des oberen Kolbenteils des Druckkolbens durch Einschnappen oder Klipsen bzw. durch Schweißen, Löten oder Kleben dicht befestigt ist.According to the invention, this object is achieved in that the deflection sleeve is tightly secured axially below the passage to an inner jacket of the upper piston part of the pressure piston by snapping or clipping or by welding, soldering or gluing.

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.Exactly by a combination of the measures just mentioned the disadvantages described above are effectively avoided. It is represented by the preferably designed as a deflecting bulkhead on the one hand in front of the check valve, a so-called dead or rest space for the hydraulic fluid. New incoming air bubbles or oil foam can no longer vortex and influence the pressure in front of the check valve and already "calm" hydraulic fluid. A subset of air bubbles and oil foam can thus escape relatively undisturbed from the Umlenkhülse against the direction of gravity upwards. Another amount of unwanted air in the hydraulic fluid flow is passed before the actual entry into the interior of the Umlenkhülse about the axially above the passage in the pressure piston lying at least one vent hole into the open. Exactly this combinatorial effect (baffle + bleed hole) means that the high-pressure chamber remains largely incompressible, since the unwanted air components are no longer 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 are to be applied, so that it is always guaranteed even with an oblique installation of the hydraulic support element 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 deflecting sleeve as a bulkhead means other means may be provided. Thus, simple, in the flow direction behind the passage in the pressure piston lying baffles or the like are provided for the hydraulic fluid, so that at least a direct impact of the hydraulic fluid flow is avoided with the located before the check valve and already "calmed down" hydraulic fluid.

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 it can be provided as a climbing path for the hydraulic fluid on the inner surface of the pressure piston, a channel. It is more expedient, however, to arrange here a circumferential annular channel, so that a relatively large amount of hydraulic fluid can be accumulated in the support element.

Eine einfache Maßnahme einer Befestigung der Umlenkhülse am Innenmantel des Druckkolbens besteht darin, dass diese beispielsweise durch Einschnappen oder Klipsen am Innenmantel des Druckkolbens befestigt werden kann. 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 surface of the pressure piston is that it can be fixed, for example by snapping or clipping on the inner surface of the pressure piston. Alternatively, measures such as welding, gluing, soldering o. Ä. Preferably, the deflection sleeve should consist of a lightweight material such as sheet metal. It is also conceivable, however, a 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 easily finished. Thus, an anti-rotation and position assignment of the passage to the radial passage is unnecessary.

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 closed in the region of its underside by a bottom. However, it can also be formed open, so that then the high-pressure chamber is bounded on one side by a bottom 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 sole figure in a longitudinal section a hydraulic support element with the measures according to the invention.

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 it is known in the art of its structure and the mode of action itself.

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 extends over its outer shell 3 fixed in a receptacle, not shown, of a cylinder head of the internal combustion engine. This is also on a slope installation thought. In a bore 4 of the housing 2, a pressure piston 5 of thin-walled design is accommodated axially movable for this purpose. This pressure piston 5 projects beyond an edge 7 of the housing 2 with its head 6.

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 a head 6 facing away from the end face 8 (here an annular surface) of the plunger 5 and a bottom 9 of the housing 2, a high pressure chamber 10 is generated for the hydraulic fluid. On an underside of the end face 8 extends a check valve 11, the valve body is sprung in the direction of the end face 8.

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 enclosed by the pressure piston 5, a reservoir 12 for hydraulic means. Thus, the high pressure chamber 10 is supplied from the reservoir 12 via the check valve 11, if necessary, with hydraulic fluid.

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 medium. This communicates with a supply line for the hydraulic fluid in the cylinder head. From the radial passage 13, the hydraulic fluid is further passed into an annular groove 20 in the outer casing 21 of the pressure piston 5. This annular groove 20 lies axially above the radial passage 13 and has at least one passage 14 in the interior of the pressure piston fifth

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 axially below the passage 14 on the inner shell 17, a bulkhead means 15 is fixed. This is designed here as Umlenkhülse 15a. Thus, starting from the passage 14, an annular rising path 18 is formed after the passage 14 for the hydraulic medium.

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 directed into an enclosed space 19 of the Umlenkhülse 15a. Thus, this interior 19 represents the actual storage space 12 of the pressure piston 5. From this interior 19 takes place in known manner, a forwarding of the hydraulic fluid via 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 two diametrically opposite ventilation holes 16 are arranged axially above the passage 14, but below the edge 7. 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 deflecting sleeve 15a as a barrier means 15, in conjunction with the aforementioned vent holes 16, there is the excellent combinatorial effect that the high-pressure chamber 10 remains largely free of oil foam and air bubbles and the support element 1 is 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 the hydraulic fluid through the passage 14 in the pressure piston 5, a first quantum of air is passed through the ventilation holes 16 indirectly into the open. At the same time, the accumulated immediately above the check valve 11 hydraulic fluid is relatively calm within the Umlenkhülse 15 a before. This is due to the fact that it is no longer swirled and thus influenced by hydraulic fluid flowing in at the radial passage 13. If the hydraulic medium routed via the climbing path 18 into the interior 19 of the deflecting sleeve 15a still has air bubbles or dissolved air, the air rises slightly and does not affect the relatively "calm" hydraulic medium immediately before the check valve 11.

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 (5)

  1. Hydraulic supporting element (1) for a valve drive of an internal combustion engine, having a hollow cylindrical housing (2) which can be installed with its outer casing (3) into a receptacle of a cylinder head of the internal combustion engine and holds an axially moveable pressure piston (5) in its bore (4), which pressure piston (5) is composed axially of a lower and an upper piston part and protrudes with its head (6) beyond an edge (7) of the housing (2), a high pressure space (10) for the hydraulic medium being formed between an end face (8), which faces away from the head (6), of the pressure piston (5) and a lower side (9) of the housing (2), it being possible for said high pressure space (10) to be closed off by means of a non-return valve (11) which opens in the direction of said high pressure space (10) and is fastened to the end face (8), the high pressure space (10) being supplied with hydraulic medium via the non-return valve (11) from a reservoir (12) which is enclosed by the pressure piston (5), and the housing (2) having at least one radial passage (13) for the hydraulic medium from the cylinder head, which radial passage (13) is fluidically connected radially at the inside to at least one aperture (14) in the pressure piston (5), which aperture (14) is situated axially above said radial passage (13) and leads into the reservoir (12) of said piston (5), with
    a) a partial quantity of hydraulic medium situated at least directly upstream of the non-return valve (11) being separated from hydraulic medium entering via the aperture (14) by bulkhead means (15) on the one hand, and
    b) the pressure piston (5) having at least one ventilation bore (16) axially above the aperture (14) but within the housing (2) on the other hand,
    the bulkhead means (15) additionally being embodied as a deflecting sleeve (15a) for the hydraulic medium, said deflecting sleeve (15a) extending into the vicinity of the head (6), with an ascending path (18) for the hydraulic medium being formed between the deflecting sleeve (15a) and an inner casing (17) of the upper piston part of the pressure piston (5), said hydraulic medium being guided in the region of the head (6) into an inner space (19), which forms the actual reservoir (12), of the deflecting sleeve (15a) such that it accumulates directly upstream of the non-return valve (11), characterized in that the deflecting sleeve (15a) is sealingly connected axially below the aperture (14) to an inner casing (17) of the upper piston part of the pressure piston (5) by being snapped in, clipped in or by means of welding, soldering or adhesive.
  2. Supporting element according to Claim 1, characterized in that the deflecting sleeve (15a) is produced as a thin-walled lightweight part, such as a sheet metal part, or from plastic.
  3. Supporting element according to Claim 1, characterized in that at least two ventilation bores (16) are provided in the pressure piston (5), said ventilation bores (16) being arranged so as to be distributed uniformly in the peripheral direction.
  4. Supporting element according to Claim 1, characterized in that the ascending path (18) is embodied as an encircling annular duct.
  5. Supporting element according to Claim 1, characterized in that the aperture (14) in the pressure piston (5) is arranged 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)

Application Number Priority Date Filing Date Title
DE102004006903 2004-02-12
DE102004006903A DE102004006903A1 (en) 2004-02-12 2004-02-12 Hydraulic support element

Publications (2)

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

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US (1) US6959677B2 (en)
EP (1) EP1564383B1 (en)
DE (2) DE102004006903A1 (en)

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DE102021120734A1 (en) 2021-08-10 2023-02-16 Schaeffler Technologies AG & Co. KG Hydraulic support element for a valve drive 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
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JP5948511B2 (en) 2014-01-20 2016-07-06 日鍛バルブ株式会社 Hydraulic lash adjuster
DE102014212272A1 (en) 2014-06-26 2015-12-31 Schaeffler Technologies AG & Co. KG supporting
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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
DE102021120734A1 (en) 2021-08-10 2023-02-16 Schaeffler Technologies AG & Co. KG Hydraulic support element for a valve drive of an internal combustion engine

Also Published As

Publication number Publication date
US6959677B2 (en) 2005-11-01
DE102004006903A8 (en) 2006-01-12
DE102004006903A1 (en) 2005-09-22
EP1564383A1 (en) 2005-08-17
US20050178351A1 (en) 2005-08-18
DE502005000508D1 (en) 2007-05-10

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