EP0841474A1 - Engine valve lifter with deactivation mechanism, in particular for cylinder cut-off - Google Patents

Engine valve lifter with deactivation mechanism, in particular for cylinder cut-off Download PDF

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Publication number
EP0841474A1
EP0841474A1 EP97117484A EP97117484A EP0841474A1 EP 0841474 A1 EP0841474 A1 EP 0841474A1 EP 97117484 A EP97117484 A EP 97117484A EP 97117484 A EP97117484 A EP 97117484A EP 0841474 A1 EP0841474 A1 EP 0841474A1
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EP
European Patent Office
Prior art keywords
tappet
cup
webs
recesses
pressure piece
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
EP97117484A
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German (de)
French (fr)
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EP0841474B1 (en
Inventor
Christian Dovids
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
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Bayerische Motoren Werke AG
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Publication of EP0841474A1 publication Critical patent/EP0841474A1/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
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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 is based on a switchable tappet in the preamble of claim 1 type described
  • Japanese Patent Laid-Open No. 61-118514 is one with a single one Switchable bucket tappets interacting cams of a control shaft are known, which cooperates with the stem of a gas exchange valve Pressure piece includes that over the inside of the tappet guide shirt is slidably guided against an arranged restoring element and with the shirt over recesses arranged in pairs relocatable locking bolts by means of spring action in the locked and by controlled hydraulic actuation is in unlocked connection.
  • the pressure piece of this well-known tappet is a cylindrical solid body designed and therefore of relatively large mass, which disadvantageously activated valve train of the gas exchange valve considerable forces are generated.
  • the invention has for its object a generic, switchable Cup tappets to improve so that with a lightweight to reduce weight Thrust piece the mass forces in the valve train are significantly reduced.
  • the advantage of the invention can be seen in a lightweight pressure piece, wherein
  • the fixed, central connection is another structural and functional advantage of webs and struts over a housing to accommodate a valve lash adjuster.
  • the embodiment specified in claim 2 also enables the tappet reduced weight due to relatively thin-walled sections of the shirt form, the recesses provided for the locking bolts in Guide shirt can be dimensioned advantageously in the recesses.
  • the pressure piece on the tappet arranged captively via spring-loaded locking bolts, the im Guide shirt of the tappet between the end faces of the locking bolts and the associated caps of the recesses formed chambers a channel arranged on the outer circumference of the tappet guide shirt are supplied.
  • the tappet according to claim 4 is one of the struts for receiving a Supply channel to an oil storage chamber in which a hydraulic valve lash compensation element receiving housing, the supply channel with one arranged in the thick-walled area of the tappet guide shirt Niche is connected and therefore an adequate oil supply for the valve clearance compensation element is ensured.
  • claim 5 serve Web and the struts in an advantageous constructive arrangement of a common Rest of a return spring arranged in the tappet, the rest on the pressure piece side in a simple manner over a projecting section of the Housing is kept centered.
  • claim 6 includes the proposal a non-rotating cup tappet with a rotatable mounted slide plate for the action of an off-center control cam equip.
  • a switchable tappet 1 for a gas exchange valve shown only in sections 2 of an internal combustion engine, not shown, includes one with the Shaft 3 of the gas exchange valve 2 cooperating pressure piece 4, which over the Inside 5 of the tappet guide shirt 6 against a return spring 7 is slidably guided.
  • the pressure piece 4 with the guide shirt 6 via recesses 8, 8 'and 9, 9' which are arranged in alignment in pairs Locking bolt 10 locked in by spring action and controlled by hydraulic action in unlocked connection.
  • Cup tappet 1 designed such that the cup tappet 1 inside in areas of the webs 12 and the struts 15 of the pressure piece 4 radial Projections 16, 17 with the cylinder jacket 11 of the pressure piece 4 leading sliding surfaces 18 and 19, the projections 16 facing the webs 12 the recesses 8 ', 9' provided on the tappet side in the guide shirt 6 for have the locking bolts 10.
  • This enables both the tappet side To dimension recesses 8 ', 9' in the guide shirt 6 sufficiently large, with which in an advantageous manner in connection with the correspondingly adapted Locking bolt 10 a high level of operational security of this locking device Pressure piece 4 and tappet 1 is achieved.
  • the drawing also shows that the over the end faces 23 of the locking pin 10 in these recesses 8 ', 9' formed chambers 24 via a branch line 25 with an arranged in the outer circumference of the tappet guide shirt 6 Channel 26 are connected, with a in the stroke direction of the tappet 1 in Guide shirt 6 trained pocket 27 is in oil-bearing connection.
  • this channel 26 arranged in the outer circumference of the guide shirt 6 is that the supplied oil is vented or defoamed through the channel area can and thus in the chambers 24 an air and bubble-free oil for a reliable Unlocking of pressure piece 4 and tappet 1 is available.
  • the tappet 1 is secured against rotation stroke movable pressure piece 4 in one of the struts 15 a supply channel 28 to one in the housing 13 above the hydraulic valve lash compensation element - HVA - 14 provided oil storage chamber 29, the Supply channel 28 with an outer circumference of the tappet guide shirt 6 in the area of the strut 15 provided with the supply channel 28 associated projection 17 arranged open niche 30 in connection stands, Figure 3.
  • the webs 12 and struts 15 serve to avoid additional components together the support of the return spring 7 arranged in the tappet 1, wherein the biased against a cup bottom portion 31 is arranged Return spring 7 at least in one end region by means of a Crosspieces 12 and the struts 15 projecting housing section 13 'held centered is.
  • This training also makes it possible advantageously that the one Anti-rotation lock 32 provided tappet 1 with one on the annular cup bottom section 31 centered rotatably mounted slide plate 33 is on which a control cam, not shown, acts somewhat off-center Wear reduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)

Abstract

The device comprises a switchable cup tappet which has a thrust piece (4) acting with the shaft of the gas exchange valve. The thrust piece is guided in the cup tappet guide sleeve (6) via a relatively thin cylinder jacket (11). The jacket is connected via webs (12) locking bolt (10) holder apertures (8,9), to a housing (13) for a valve play compensation element (14). The housing is additionally connected to the cylinder jacket via struts, which are positioned mainly at right angles to the webs.

Description

Die Erfindung geht aus von einem schaltbaren Tassenstößel der im Oberbegriff des Patentanspruches 1 beschriebenen BauartThe invention is based on a switchable tappet in the preamble of claim 1 type described

Aus der japanischen Patent-Offenlegungsschrift 61-118514 ist ein mit einem einzigen Nocken einer Steuerwelle zusammenwirkender, schaltbarer Tassenstößel bekannt, der ein mit dem Schaft eines Gaswechselventils zusammenwirkendes Druckstück umfaßt, das über die Innenseite des Tassenstößel-Führungshemdes gegen ein angeordnetes Rückstellelement gleitbeweglich geführt ist und das mit dem Führungshemd über in paarweise fluchtend angeordneten Ausnehmungen verlagerbare Sperrbolzen mittels Federbeaufschlagung in verriegelter und mittels gesteuert hydraulischer Beaufschlagung in entriegelter Verbindung steht.Japanese Patent Laid-Open No. 61-118514 is one with a single one Switchable bucket tappets interacting cams of a control shaft are known, which cooperates with the stem of a gas exchange valve Pressure piece includes that over the inside of the tappet guide shirt is slidably guided against an arranged restoring element and with the shirt over recesses arranged in pairs relocatable locking bolts by means of spring action in the locked and by controlled hydraulic actuation is in unlocked connection.

Das Druckstück dieses bekannten Tassenstößels ist als zylindrischer Vollkörper gestaltet und damit von relativ großer Masse, wodurch in nachteiliger Weise bei aktiviertem Ventiltrieb des Gaswechselventils erhebliche Kräfte erzeugt sind.The pressure piece of this well-known tappet is a cylindrical solid body designed and therefore of relatively large mass, which disadvantageously activated valve train of the gas exchange valve considerable forces are generated.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen, schaltbaren Tassenstößel derart zu verbessern, daß mit einem zur Gewichtsreduzierung leichtbauenden Druckstück die Massenkräfte im Ventiltrieb erheblich verringert sind. The invention has for its object a generic, switchable Cup tappets to improve so that with a lightweight to reduce weight Thrust piece the mass forces in the valve train are significantly reduced.

Diese Aufgabe ist mit dem Patentanspruch 1 gelöst, wobei das Druckstück in dem Tassenstößel-Führungshemd über einen relativ dünnwandigen Zylindermantel geführt angeordnet ist und der Zylindermantel über die druckstückseitigen Ausnehmungen für die Sperrbolzen aufnehmende Stege mit einem ventilseitig offen gestalteten Gehäuse zur Aufnahme eines Ventilspiel-Ausgleichselementes in fester Verbindung steht, wobei das Gehäuse über zu den Stegen im wesentlichen quer gerichtet angeordnete Streben zusätzlich mit dem Zylindermantel fest verbunden ist.This object is achieved with claim 1, wherein the pressure piece in the Bucket guide shirt guided over a relatively thin-walled cylinder jacket is arranged and the cylinder jacket over the pressure piece-side recesses for the webs receiving the locking bolts with one open on the valve side designed housing to accommodate a valve lash compensation element in fixed Connection is made, the housing is substantially transverse to the webs Directionally arranged struts are also firmly connected to the cylinder jacket is.

Der Vorteil der Erfindung ist in einem leichtbauenden Druckstück zu sehen, wobei als weiterer baulicher und funktioneller Vorteil hinzutritt die feste, mittige Verbindung von Stegen und Streben über ein Gehäuse zur Aufnahme eines Ventilspiel-Ausgleichselementes.The advantage of the invention can be seen in a lightweight pressure piece, wherein The fixed, central connection is another structural and functional advantage of webs and struts over a housing to accommodate a valve lash adjuster.

Weitere vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben. So ermöglicht die in Anspruch 2 angegebene Ausgestaltung, auch den Tassenstößel durch relativ dünnwandige Abschnitte des Führungshemdes gewichtsreduziert auszubilden, wobei die für die Sperrbolzen vorgesehenen Ausnehmungen im Führungshemd in den Ausnehmungen vorteilhaft dimensioniert werden können. In einer weiteren Ausgestaltung nach Anspruch 3 ist am Tassenstößel das Druckstück über federbelastete Sperrbolzen verliergesichert angeordnet, wobei die im Führungshemd des Tassenstößels zwischen den Stirnflächen der Sperrbolzen und den diesen zugeordneten Deckeln der Ausnehmungen gebildeten Kammern über einen am Außenumfang des Tassenstößel-Führungshemdes angeordneten Kanal versorgt sind. Diese Anordnung bietet gegenüber dem bekannten Stand der Technik bei einer Mehrventilanordnung den Vorteil gering benachbart angeordneter Tassenstößel einerseits und bietet mit dem im Außenumfang des Führungshemdes angeordneten Kanal andererseits den Vorteil der Ausscheidung von Luft und Schaum aus dem in die Kammern zuzuführenden Öl zur einwandfreien Steuerung der Sperrbolzen in eine entriegelte Position. In weiterer Ausgestaltung des Tassenstößels nach Anspruch 4 dient eine der Streben der Aufnahme eines Versorgungskanals zu einer Öl-Vorratskammer in dem ein hydraulisches Ventilspiel-Ausgleichselement aufnehmenden Gehäuse, wobei der Versorgungskanal mit einer im dickwandigen Bereich des Tassenstößel-Führungshemdes angeordneten Nische in Verbindung steht und somit eine ausreichende Ölversorgung auch für das Ventilspiel-Ausgleichselement sichergestellt ist. Nach Anspruch 5 dienen die Stege und die Streben in einer vorteilhaft konstruktiven Anordnung einer gemeinsamen Auflage einer im Tassenstößel angeordneten Rückstellfeder, die im übrigen druckstückseitig auf einfache Weise über einen überstehenden Abschnitt des Gehäuses zentriert gehalten ist. Schließlich beinhaltet der Anspruch 6 den Vorschlag, einen drehgesichert ausgebildeten Tassenstößel mit einer drehbeweglich gelagerten Gleitplatte zur Einwirkung eines außermittig angreifenden Steuernockens auszurüsten. Abschließend sind aufgrund der erfindungsgemäß konstruktiven Ausgestaltung der Tassenstößel sowie das Druckstück als Feingußteil ausgebildet mit dem Vorteil einer kostengünstigen Herstellung.Further advantageous configurations are described in the subclaims. Thus, the embodiment specified in claim 2 also enables the tappet reduced weight due to relatively thin-walled sections of the shirt form, the recesses provided for the locking bolts in Guide shirt can be dimensioned advantageously in the recesses. In a further embodiment according to claim 3 is the pressure piece on the tappet arranged captively via spring-loaded locking bolts, the im Guide shirt of the tappet between the end faces of the locking bolts and the associated caps of the recesses formed chambers a channel arranged on the outer circumference of the tappet guide shirt are supplied. This arrangement offers compared to the known state of the Technology in a multi-valve arrangement the advantage of slightly adjacent Cup tappet on the one hand and with the outer circumference of the shirt arranged channel on the other hand the advantage of excretion of air and foam from the oil to be fed into the chambers for perfect Control of the locking bolts in an unlocked position. In a further embodiment the tappet according to claim 4 is one of the struts for receiving a Supply channel to an oil storage chamber in which a hydraulic valve lash compensation element receiving housing, the supply channel with one arranged in the thick-walled area of the tappet guide shirt Niche is connected and therefore an adequate oil supply for the valve clearance compensation element is ensured. According to claim 5 serve Web and the struts in an advantageous constructive arrangement of a common Rest of a return spring arranged in the tappet, the rest on the pressure piece side in a simple manner over a projecting section of the Housing is kept centered. Finally, claim 6 includes the proposal a non-rotating cup tappet with a rotatable mounted slide plate for the action of an off-center control cam equip. In conclusion, due to the design according to the invention Design of the tappet and the pressure piece designed as an investment casting with the advantage of an inexpensive production.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben. Es zeigt

Figur 1
den erfindungsgemäßen Tassenstößel im Längsschnitt gemäß der Linie I-I in Figur 2,
Figur 2
den Tassenstößel im Querschnitt gemäß der Linie II-II in Figur 1 und
Figur 3
den erfindungsgemäßen Tassenstößel in einem weiteren Längsschnitt gemäß der Linie III-III in Figur 2.
The invention is described with reference to an embodiment shown in the drawing. It shows
Figure 1
the cup tappet according to the invention in longitudinal section along the line II in Figure 2,
Figure 2
the tappet in cross section along the line II-II in Figure 1 and
Figure 3
the tappet according to the invention in a further longitudinal section along the line III-III in Figure 2.

Ein schaltbarer Tassenstößel 1 für ein lediglich abschnittsweise dargestelltes Gaswechselventil 2 einer nicht gezeigten Brennkraftmaschine umfaßt ein mit dem Schaft 3 des Gaswechselventils 2 zusammenwirkendes Druckstück 4, das über die Innenseite 5 des Tassenstößel-Führungshemdes 6 gegen eine Rückstellfeder 7 gleitbeweglich geführt ist. Weiter steht das Druckstück 4 mit dem Führungshemd 6 über in paarweise fluchtend angeordneten Ausnehmungen 8, 8' und 9, 9' verlagerbare Sperrbolzen 10 mittels Federbeaufschlagung in verriegelter und mittels gesteuert hydraulischer Beaufschlagung in entriegelter Verbindung. A switchable tappet 1 for a gas exchange valve shown only in sections 2 of an internal combustion engine, not shown, includes one with the Shaft 3 of the gas exchange valve 2 cooperating pressure piece 4, which over the Inside 5 of the tappet guide shirt 6 against a return spring 7 is slidably guided. Next is the pressure piece 4 with the guide shirt 6 via recesses 8, 8 'and 9, 9' which are arranged in alignment in pairs Locking bolt 10 locked in by spring action and controlled by hydraulic action in unlocked connection.

Zur Erzielung eines durch Gewichtsreduzierung leichtbauenden Druckstückes 4 ist dieses in dem Tassenstößel-Führungshemd 6 über einen relativ dünnwandigen Zylindermantel 11 geführt angeordnet, wobei der Zylindermantel 11 über die druckstückseitigen Ausnehmungen 8, 9 für die Sperrbolzen 10 aufnehmende Stege 12 mit einem ventilseitig offen gestalteten Gehäuse 13 zur Aufnahme eines vorzugsweise hydraulischen Ventilspiel-Ausgleichselementes 14 in fester Verbindung steht, und das Gehäuse 13 über zu den Stegen 12 im wesentlichen quer gerichtet angeordnete Streben 15 zusätzlich mit dem Zylindermantel 11 fest verbunden ist.In order to achieve a pressure piece 4 which is lightweight due to weight reduction this in the tappet guide shirt 6 over a relatively thin-walled Cylinder jacket 11 is arranged guided, the cylinder jacket 11 over the Pressure-side recesses 8, 9 for the locking pin 10 receiving Crosspieces 12 with a housing 13 designed to be open on the valve side for receiving a preferably hydraulic valve lash compensation element 14 in a fixed connection stands, and the housing 13 is directed transversely to the webs 12 substantially arranged struts 15 additionally connected to the cylinder jacket 11 is.

Wie aus den Figuren 1 mit 3 ferner hervorgeht, ist auch zur Erzielung eines leichtbauenden Tassenstößels 1 dieser derart gestaltet, daß der Tassenstößel 1 innenseitig in Bereichen der Stege 12 und der Streben 15 des Druckstückes 4 radiale Vorsprünge 16, 17 mit den Zylindermantel 11 des Druckstückes 4 führenden Gleitflächen 18 und 19 aufweist, wobei die den Stegen 12 zugewandten Vorsprünge 16 die tassenstößelseitig im Führungshemd 6 vorgesehenen Ausnehmungen 8', 9' für die Sperrbolzen 10 aufweisen. Dies ermöglicht sowohl die tassenstößelseitigen Ausnehmungen 8', 9' im Führungshemd 6 ausreichend groß zu dimensionieren, womit in vorteilhafter Weise in Verbindung mit den entsprechend angepaßten Sperrbolzen 10 eine hohe Betriebssicherheit dieser Verriegelungseinrichtung von Druckstück 4 und Tassenstößel 1 erzielt ist.As can also be seen from FIGS. 1 and 3, a lightweight construction is also to be achieved Cup tappet 1 designed such that the cup tappet 1 inside in areas of the webs 12 and the struts 15 of the pressure piece 4 radial Projections 16, 17 with the cylinder jacket 11 of the pressure piece 4 leading sliding surfaces 18 and 19, the projections 16 facing the webs 12 the recesses 8 ', 9' provided on the tappet side in the guide shirt 6 for have the locking bolts 10. This enables both the tappet side To dimension recesses 8 ', 9' in the guide shirt 6 sufficiently large, with which in an advantageous manner in connection with the correspondingly adapted Locking bolt 10 a high level of operational security of this locking device Pressure piece 4 and tappet 1 is achieved.

Ferner geht aus der Zeichnung hervor, daß die über Druckfedern 20 in den druckstückseitigen Ausnehmungen 8, 9 abgestützt angeordneten Sperrbolzen in der Verriegelungsposition mit den tassenseitigen Ausnehmungen 8', 9' gegen kleinvolumige Anschläge 21 anliegen, die an die tassenseitigen Ausnehmungen 8', 9' verschließenden Deckeln 22 angeordnet sind. Mit dieser Ausgestaltung sind die Sperrbolzen 10 bereits zu Anfang einer hydraulischen Beaufschlagung in vorteilhafter Weise großflächig beaufschlagt, wobei die Beaufschlagung bei geringfügiger Entfernung der Sperrbolzen 10 von den Anschlägen 21 flächenmäßig noch zunimmt.Furthermore, it can be seen from the drawing that the compression springs 20 in the pressure piece side Recesses 8, 9 arranged locking pins in the Locking position with the cup-side recesses 8 ', 9' against small-volume Stops 21 rest against the cup-side recesses 8 ', 9' closing covers 22 are arranged. With this configuration, the Locking bolt 10 already advantageous at the beginning of a hydraulic application Way acted over a large area, the application at a slight Removal of the locking pin 10 from the stops 21 in terms of area increases.

Auch zeigt die Zeichnung, daß die über den Stirnflächen 23 der Sperrbolzen 10 in diesen Ausnehmungen 8', 9' gebildeten Kammern 24 über je eine Stichleitung 25 mit einem im Außenumfang des Tassenstößel-Führungshemdes 6 angeordneten Kanal 26 verbunden sind, der mit einer in Hubrichtung des Tassenstößels 1 im Führungshemd 6 ausgebildeten Tasche 27 in ölführender Verbindung steht. Der Vorteil dieses im Außenumfang des Führungshemdes 6 angeordneten Kanals 26 ist, daß über den Kanalbereich das zugeführte Öl entlüften bzw. entschäumen kann und somit in den Kammern 24 ein luft- und blasenfreies Öl für eine betriebssichere Entriegelung von Druckstück 4 und Tassenstößel 1 zur Verfügung steht.The drawing also shows that the over the end faces 23 of the locking pin 10 in these recesses 8 ', 9' formed chambers 24 via a branch line 25 with an arranged in the outer circumference of the tappet guide shirt 6 Channel 26 are connected, with a in the stroke direction of the tappet 1 in Guide shirt 6 trained pocket 27 is in oil-bearing connection. Of the Advantage of this channel 26 arranged in the outer circumference of the guide shirt 6 is that the supplied oil is vented or defoamed through the channel area can and thus in the chambers 24 an air and bubble-free oil for a reliable Unlocking of pressure piece 4 and tappet 1 is available.

Zur Erreichung eines einfachen Aufbaues weist das im Tassenstößel 1 drehgesichert hubbewegliche Druckstück 4 in einer der Streben 15 einen Versorgungskanal 28 zu einer im Gehäuse 13 oberhalb des hydraulischen Ventilspiel-Ausgleichselementes - HVA - 14 vorgesehenen Öl-Vorratskammer 29 auf, wobei der Versorgungskanal 28 mit einer im Außenumfang des Tassenstößel-Führungshemdes 6 im Bereich des der mit dem Versorgungskanal 28 versehenen Strebe 15 zugeordneten Vorsprunges 17 angeordneten offenen Nische 30 in Verbindung steht, Figur 3.In order to achieve a simple structure, the tappet 1 is secured against rotation stroke movable pressure piece 4 in one of the struts 15 a supply channel 28 to one in the housing 13 above the hydraulic valve lash compensation element - HVA - 14 provided oil storage chamber 29, the Supply channel 28 with an outer circumference of the tappet guide shirt 6 in the area of the strut 15 provided with the supply channel 28 associated projection 17 arranged open niche 30 in connection stands, Figure 3.

Zur Vermeidung zusätzlicher Bauelemente dienen die Stege 12 und Streben 15 gemeinsam der Auflage der im Tassenstößel 1 angeordneten Rückstellfeder 7, wobei die gegen einen Tassenboden-Abschnitt 31 abgestützte, vorgespannt angeordnete Rückstellfeder 7 zumindest in einem Endbereich mittels eines über die Stege 12 und die Streben 15 vorstehenden Gehäuse-Abschnittes 13' zentriert gehalten ist.The webs 12 and struts 15 serve to avoid additional components together the support of the return spring 7 arranged in the tappet 1, wherein the biased against a cup bottom portion 31 is arranged Return spring 7 at least in one end region by means of a Crosspieces 12 and the struts 15 projecting housing section 13 'held centered is.

Die vorbeschriebene konstruktive Ausgestaltung von Tassenstößel 1 und Druckstück 4 ermöglicht eine vorteilhafte Herstellung jeweils als Feingußteil.The above-described design of the tappet 1 and pressure piece 4 enables advantageous manufacture in each case as an investment casting.

Diese Ausbildung ermöglicht es ferner in vorteilhafter Weise, daß der mit einer Drehsicherung 32 versehene Tassenstößel 1 mit einer auf dem ringförmigen Tassenboden-Abschnitt 31 zentriert drehbeweglich gelagerten Gleitplatte 33 ausgerüstet ist, an der ein nicht dargestellter Steuernocken etwas außermittig angreift zur Verschleißreduzierung.This training also makes it possible advantageously that the one Anti-rotation lock 32 provided tappet 1 with one on the annular cup bottom section 31 centered rotatably mounted slide plate 33 is on which a control cam, not shown, acts somewhat off-center Wear reduction.

Claims (7)

Schaltbarer Tassenstößel für Gaswechselventile von Brennkraftmaschinen, insbesondere mit Zylinderabschaltung, der ein mit dem Schaft (3) eines Gaswechselventils (2) zusammenwirkendes Druckstück (4) umfaßt, das über die Innenseite (5) des Tassenstößel-Führungshemdes (6) gegen ein angeordnetes Rückstellelement (Rückstellfeder 7) gleitbeweglich geführt ist, und das mit dem Führungshemd (6) über in paarweise fluchtend angeordneten Ausnehmungen (8, 8', 9, 9') verlagerbare Sperrbolzen (10) mittels Federbeaufschlagung in verriegelter und mittels gesteuert hydraulischer Beaufschlagung in entriegelter Verbindung steht,
dadurch gekennzeichnet, daß das Druckstück (4) in dem Tassenstößel-Führungshemd (6) über einen relativ dünnwandigen Zylindermantel (11) geführt angeordnet ist, und der Zylindermantel (11) über die druckstückseitigen Ausnehmungen (8, 9) für die Sperrbolzen (10) aufnehmende Stege (12) mit einem ventilseitig offen gestalteten Gehäuse (13) zur Aufnahme eines Ventilspiel-Ausgleichselementes (14) in fester Verbindung steht, wobei das Gehäuse (13) über zu den Stegen (12) im wesentlichen quer gerichtet angeordnete Streben (15) zusätzlich mit dem Zylindermantel (11) fest verbunden ist. Switchable bucket tappet for gas exchange valves of internal combustion engines, especially with cylinder deactivation, which comprises a pressure piece (4) which cooperates with the stem (3) of a gas exchange valve (2), the over the inside (5) of the tappet guide shirt (6) against an arranged return element (return spring 7) is slidably guided, and that is connected with the guide shirt (6) via recesses (8, 8 ', 9, 9') arranged in pairs in aligned recesses by means of spring loading in a locked connection and by means of controlled hydraulic loading in an unlocked connection,
characterized, that the pressure piece (4) in the tappet guide shirt (6) over a relatively thin-walled cylinder jacket (11) is arranged, and the cylinder jacket (11) via the pressure-piece-side recesses (8, 9) for the locking bolts (10) receiving webs (12) with a valve-side open housing (13) for receiving a valve lash compensation element (14) is in a fixed connection, whereby the housing (13) is additionally firmly connected to the cylinder jacket (11) via struts (15) which are arranged essentially transversely to the webs (12). Tassenstößel nach Anspruch 1, dadurch gekennzeichnet, daß der Tassenstößel (1) innenseitig in Bereichen der Stege (12) und Streben (15) des Druckstückes (4) radiale Vorsprünge (16, 17) mit dem Zylindermantel (11) des Druckstückes (4) führenden Gleitflächen (18, 19) aufweist, wobei die den Stegen (12) zugewandten Vorsprüngen (16) die tassenstößelseitig im Führungshemd (6) vorgesehenen Ausnehmungen (8', 9') für die Sperrbolzen (10) aufweisen. Cup tappet according to claim 1, characterized in that the tappet (1) on the inside in areas of the webs (12) and struts (15) of the pressure piece (4) has radial projections (16, 17) with the cylinder jacket (11) of the pressure piece (4) leading sliding surfaces (18, 19) , in which the projections (16) facing the webs (12) have the recesses (8 ', 9') provided in the guide shirt (6) on the cup tappet side for the locking bolts (10). Tassenstößel nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die über Druckfedern (20) in den druckseitigen Ausnehmungen (8, 9) abgestützt angeordneten Sperrbolzen (10) in Verriegelungsposition mit den tassenseitigen Ausnehmungen (8', 9') gegen kleinvolumige Anschläge (21) an die tassenstößelseitigen Ausnehmungen (8', 9') verschließenden Deckeln (22) anliegen, und die über den Stirnflächen (23) der Sperrbolzen (10) in diesen Ausnehmungen (8', 9') gebildeten Kammern (24) über je eine Stichleitung (25) mit einem im Außenumfang des Tassenstößel-Führungshemdes (6) angeordneten Kanal (26) verbunden sind, der mit einer in Hubrichtung des Tassenstößels (1) im Führungshemd (6) ausgebildeten Tasche (27) in ölführender Verbindung steht. Cup tappet according to claim 1 and 2, characterized in that the locking bolts (10), which are supported by pressure springs (20) in the pressure-side recesses (8, 9), are in the locking position with the cup-side recesses (8 ', 9') against small-volume stops (21) on the cup-tappet-side recesses (8 ', 9 ') close the covers (22), and the chambers (24) formed over the end faces (23) of the locking bolts (10) in these recesses (8 ', 9') each via a spur line (25) with a channel (26) arranged in the outer circumference of the tappet guide shirt (6) are connected to the is in oil-carrying connection with a pocket (27) formed in the guide shirt (6) in the stroke direction of the cup tappet (1). Tassenstößel nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß das im Tassenstößel (1) drehgesichert hubbewegliche Druckstück (4) in einer der Streben (15) einen Versorgungskanal (28) zu einer im Gehäuse (13) über einem hydraulischen Ventilspiel-Ausgleichselement (HVA 14) vorgesehenen Öl-Vorratskammer (29) aufweist, wobei der Versorgungskanal (28) mit einer im Außenumfang des Tassenstößel-Führungshemdes (6) im Bereich des der mit dem Versorgungskanal (28) versehenen Strebe (15) zugeordneten Vorsprunges (17) angeordneten offenen Nische (30) in Verbindung steht. Cup tappet according to claims 1 to 3, characterized in that that in the cup tappet (1) secured against rotation stroke pressure piece (4) in one of the struts (15) has a supply channel (28) to an oil storage chamber (29) provided in the housing (13) above a hydraulic valve lash compensation element (HVA 14) , in which the supply channel (28) is connected to an open niche (30) arranged in the outer circumference of the tappet guide shirt (6) in the region of the projection (17) associated with the strut (15) provided with the supply channel (28). Tassenstößel nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Stege (12) und Streben (15) gemeinsam der Auflage einer im Tassenstößel (1) angeordneten Rückstellfeder (7) dienen, wobei die gegen einen Tassenboden-Abschnitt (31) abgestützte Rückstellfeder (7) mittels eines über die Stege (12) und Streben (15) vorstehenden Gehäuse-Abschnittes (13') zentriert gehalten ist. Cup tappet according to claims 1 to 4, characterized in that the webs (12) and struts (15) together serve to support a return spring (7) arranged in the tappet (1), wherein the return spring (7) supported against a cup base section (31) is held centered by means of a housing section (13 ') projecting over the webs (12) and struts (15). Tassenstößel nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß der mit einer Drehsicherung (32) versehene Tassenstößel (1) mit einer auf dem ringförmigen Tassenboden-Abschnitt (31) zentriert drehbeweglich gelagerten Gleitplatte (33) ausgerüstet ist.Cup tappet according to claims 1 to 5, characterized in that the cup tappet (1), which is provided with an anti-rotation device (32), with a the annular cup bottom section (31) is centered in a rotatably mounted manner Slide plate (33) is equipped. Tassenstößel nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß die Körper von Tassenstößel (1) und Druckstück (4) jeweils als ein Feingußteil gebildet sind.Cup tappet according to claims 1 to 6, characterized in that the body of the tappet (1) and pressure piece (4) each as an investment casting are formed.
EP97117484A 1996-11-07 1997-10-09 Engine valve lifter with deactivation mechanism, in particular for cylinder cut-off Expired - Lifetime EP0841474B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19645964 1996-11-07
DE19645964A DE19645964A1 (en) 1996-11-07 1996-11-07 Switchable tappet for gas exchange valves of internal combustion engines, especially with cylinder deactivation

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EP0841474A1 true EP0841474A1 (en) 1998-05-13
EP0841474B1 EP0841474B1 (en) 2001-09-19

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DE (2) DE19645964A1 (en)
ES (1) ES2163077T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108483A1 (en) * 2005-04-15 2006-10-19 Schaeffler Kg External part of a switchable bucket tappet
DE102008035928A1 (en) 2008-08-01 2010-02-04 Assa Abloy Sicherheitstechnik Gmbh Door opener with remote-controlled valve
DE102011007975A1 (en) 2011-01-04 2012-07-05 Assa Abloy Sicherheitstechnik Gmbh Door hardware device
CN102852578A (en) * 2012-09-28 2013-01-02 长城汽车股份有限公司 Gasoline engine tappet
CN114102284A (en) * 2021-11-02 2022-03-01 东风柳州汽车有限公司 Tool for high-pressure oil pump tappet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19844202A1 (en) * 1998-09-26 2000-03-30 Schaeffler Waelzlager Ohg Internal combustion engine valve tappet comprises inner and outer section coupled and decoupled via spring-powered slide in section mountings to maximize or zero gas valve stroke

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118514A (en) 1984-11-14 1986-06-05 Mazda Motor Corp Valve drive device in engine
US5431133A (en) * 1994-05-31 1995-07-11 General Motors Corporation Low mass two-step valve lifter
WO1995030081A1 (en) * 1994-05-03 1995-11-09 Lotus Cars Limited Valve control mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829423A1 (en) * 1978-07-05 1980-01-17 Irm Antriebstech Gmbh Hydraulically compensated valve pusher for overhead cam engine - has different material insert and guide secured to avoid oil filled cavity
US5361733A (en) * 1993-01-28 1994-11-08 General Motors Corporation Compact valve lifters
DE4433742A1 (en) * 1993-09-22 1995-04-20 Aisin Seiki Valve control device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118514A (en) 1984-11-14 1986-06-05 Mazda Motor Corp Valve drive device in engine
WO1995030081A1 (en) * 1994-05-03 1995-11-09 Lotus Cars Limited Valve control mechanism
US5431133A (en) * 1994-05-31 1995-07-11 General Motors Corporation Low mass two-step valve lifter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 304 (M - 526) 16 October 1986 (1986-10-16) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108483A1 (en) * 2005-04-15 2006-10-19 Schaeffler Kg External part of a switchable bucket tappet
DE102008035928A1 (en) 2008-08-01 2010-02-04 Assa Abloy Sicherheitstechnik Gmbh Door opener with remote-controlled valve
US8720959B2 (en) 2008-08-01 2014-05-13 Assa Abloy Sicherheitstechnik Gmbh Door opening mechanism with automatic adjustment of the door opening latch
DE102011007975A1 (en) 2011-01-04 2012-07-05 Assa Abloy Sicherheitstechnik Gmbh Door hardware device
CN102852578A (en) * 2012-09-28 2013-01-02 长城汽车股份有限公司 Gasoline engine tappet
CN102852578B (en) * 2012-09-28 2016-01-20 长城汽车股份有限公司 A kind of gasoline engine tappet
CN114102284A (en) * 2021-11-02 2022-03-01 东风柳州汽车有限公司 Tool for high-pressure oil pump tappet
CN114102284B (en) * 2021-11-02 2023-01-24 东风柳州汽车有限公司 Tool for high-pressure oil pump tappet

Also Published As

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ES2163077T3 (en) 2002-01-16
DE59704650D1 (en) 2001-10-25
DE19645964A1 (en) 1998-05-14
EP0841474B1 (en) 2001-09-19

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