DE10204672A1 - Valve-actuating switch element has two securing rings, thickness of one of which can be varied - Google Patents

Valve-actuating switch element has two securing rings, thickness of one of which can be varied

Info

Publication number
DE10204672A1
DE10204672A1 DE10204672A DE10204672A DE10204672A1 DE 10204672 A1 DE10204672 A1 DE 10204672A1 DE 10204672 A DE10204672 A DE 10204672A DE 10204672 A DE10204672 A DE 10204672A DE 10204672 A1 DE10204672 A1 DE 10204672A1
Authority
DE
Germany
Prior art keywords
coupling
bore
switching
receptacle
stop
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.)
Withdrawn
Application number
DE10204672A
Other languages
German (de)
Inventor
Norbert Geyer
Peter Sailer
Oliver Schnell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to DE10204672A priority Critical patent/DE10204672A1/en
Priority claimed from CA2470834A external-priority patent/CA2470834C/en
Priority claimed from DE2003500859 external-priority patent/DE50300859D1/en
Publication of DE10204672A1 publication Critical patent/DE10204672A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005Deactivating valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • F01L1/146Push-rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20Adjusting or compensating clearance
    • F01L1/22Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245Hydraulic tappets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0031Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of tappet or pushrod length
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00Manufacturing of components used in valve arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00Valve arrangements comprising rollers

Abstract

Proposed is a switching element (1) for a valve train of an internal combustion engine, preferably for valve shutdown, with an easy-to-implement measure of adjusting the coupling play, the coupling means (8) of which in a receptacle (6) via two locking rings (19, 20), one of which a thickness variable is available.

Description

    Field of the Invention
  • The invention relates to a switching element for a valve train Internal combustion engine, preferably for valve shutdown, with an outer part and an in whose bore axially movable inner element, the outer part and the Inner element in an axially distant one achieved by a lost motion spring Relative position have at least one receptacle aligned with each other, wherein one or more in one of the images towards the other image Slidable coupling means for coupling the inner element to the outer part the relative position to each other are applied, between the inner element and the outer part a first height stop to define the relative position is applied and with a hydraulic in the inner element Backlash compensation element is installed with a pressure piston, which pressure piston axially this is fixed out by a second height stop.
  • Background of the Invention
  • Such a switching element is derived from DE 199 15 531, which is considered to be generic out. It is here as a switchable cam follower for one Push rod drive shown. There is a height stop to define the Relative position via a piston-like element arranged in the inner element manufactured. This protrudes radially outside into a longitudinal groove in the outer part. In the axial apart state of the inner element to the outer part the element at one end of the longitudinal groove. Thus, an aligned Assignment of a coupling hole positioned in the outer part for an in Inner element arranged pistons can be created for coupling.
  • It is disadvantageous in the aforementioned prior art that a Setting the game of coupling is relatively complicated and time-consuming. It's clear, that the corresponding receptacle in the outer part (here coupling hole) for The piston is slightly free of play compared to an outer jacket of the piston must be formed. This game and an altitude fluctuates from switching element to switching element due to production. The relative there is wide variance of this mechanical free travel in the switching elements however undesirable.
  • In order to set the coupling game or its variance in one To keep tolerable size, the pistons are grouped for locking. This is extremely complex to manufacture and measure. For example Switch elements completely assembled, then the game is measured to then disassemble the switching element and one to pair corresponding pistons for coupling. It is also conceivable that Group the height stop on the longitudinal groove of the outer element.
  • Another height stop is at the above. State of the art for one Pressure piston of the play compensation element provided and designed as a ring.
  • If two pistons are provided for coupling, as described in DE 42 06 166 emerges, the above-mentioned turn out to be Attack measures almost impossible. Here the aligned position is diametrically opposed to one another in the inner element horizontal coupling holes over the contact of the two axially movable parts of the switching element on the cam base circuit. An attitude of The coupling play takes place here extremely in terms of production and measurement technology time-consuming via a pairing of corresponding switching elements (here Bucket tappet) with pairs of cams or shafts. Possibly. becomes too big Game deviation must be allowed.
  • Object of the invention
  • The object of the invention is therefore to provide a switching element of the aforementioned type create, in which the disadvantages cited are eliminated with simple means are.
  • Summary of the invention
  • According to the invention, this object is achieved by
    • - That the height stops are each formed as at least one ring-like element like a locking ring and are arranged one above the other in the bore of the outer part, the lower locking ring seen in the bore of the outer part forming the second height stop and the overlying first locking ring forming the first height stop, whereby at Installation of the locking rings of variable first and constant thickness second locking rings are provided, and the locking ring package rests on the first locking ring out of the bore against a stop such as a ring shoulder of the bore.
  • The at least two or two locking rings result in a simple, tilt-free and adjustable height stop as well as one Loss protection for the pressure piston of the hydraulic lash adjuster. Two coupling means (pistons) should preferably be provided in the inner element. Likewise, the scope of the invention also relates to Design with only one piston or with a plurality of pistons.
  • The independent claim 8 relates alternatively to a method for Setting the coupling play with a switching element according to the characteristics of Preamble of claim 1.
  • Due to the aforementioned measures, the disadvantages cited at the outset are eliminated simple means and effectively eliminated. On the one hand, when installing the Switching element guarantees that the pressure piston of the play compensation element and thus the inner element is not lost (second height stop). To the others result from the thickness-variable first available Circlips as the first height stops are a very easy way to free travel at least one coupling element (piston) opposite its enclosing one Stop recording. This free travel is preferably set such that each receptacle the corresponding coupling means in both axial directions encloses equally spaced. If the mount is a hole and not an annular groove, it is particularly advantageous if the bore has the corresponding coupling means includes concentrically.
  • Instead of the circlips, the specialist can see this point other easy-to-install slings, such as washers, insertable pins, Wedges, rings, etc. Also these means can of course be used on another Height section can be arranged as the edge of the switching element. Possibly. several circlips can be paired to each other to make the coupling play or to implement the protection against loss.
  • This guarantees that in the corresponding coupling case, the coupling means in which they are enclosing the outer part, over a variety of Switching elements, always cover the same free travel.
  • As mentioned, two pistons are preferably provided as coupling means, which run in the receptacle of the inner element designed as a radial bore and face each other diametrically. This makes a special one Tilt-proof mechanism that generates only a small component load when coupled. Instead of the radial bore in the inner element there is also a blind bore or similar configuration possible.
  • In a development of the invention, it is proposed to mount the outer part, as previously mentioned, to produce as an annular groove in its bore. this has in particular manufacturing advantages. Instead of the ring groove, too Holes are arranged.
  • According to a further advantageous specification of the invention, this is Inner element opposite the outer part, for example via a pin-like element against rotation. Thus, the coupling means with respect to their inclusion the same throughout the operating period of the switching element Positioning as when setting the coupling play. This will have an effect Tolerances, in the case of the formation of the receptacle as a circumferential annular groove, no longer out.
  • Likewise, it is proposed to use the ring groove, in the case of using two Piston as coupling means, of two diametrically opposite one another To have oil passages cut like holes. Are two supply lines in an oil gallery an environmental design such as a cylinder head or one connected to the internal combustion engine guide for the switching element provided that face each other, it does not matter which oil passage the Switching element with which supply line communicates. Oil paths of the same length are important Achieving the same switching times. In the case of only one supply line, however, is one Directional installation of the switching element necessary. Appropriate here Markings can be attached to this to facilitate assembly. Of course, the oil passages in the outer part can also be on another Circumferential section of this can be arranged so that they do not belong to the piston Coupling case swear.
  • In the event that the switching element as a cam follower in one Push rod drive is made, as it is in a further expedient development of the invention is proposed and this cam follower has a role as a cam counter-rotor, as well as to assign the supply lines from the surrounding construction to the Oil passages, it is necessary to lock the switching element. Here are appropriate anti-rotation measures such as flats on the outer jacket of the outer part proposed.
  • Instead of the pistons as coupling means, other elements such as pawls, Balls, wedges and similar elements that produce a positive connection are used become. Possibly. a form-fit connection is also conceivable.
  • The scope of this invention expressly relates to all types of Switching elements in valve trains like the aforementioned cam followers in Push rod drives, bucket tappets or support elements for rocker arms etc.
  • Brief description of the drawing
  • The invention is expediently explained in more detail with reference to the drawing. Show it:
  • Fig. 1 shows a longitudinal section through a shaft element designed as a roller tappet for a tappet rod drive and
  • Fig. 2 shows a 90 ° rotated partial longitudinal section of FIG. 1.
  • Detailed description of the drawing
  • Figs. 1, 2 disclose a switching element 1 for a valve drive of an internal combustion engine. This is designed as a roller tappet for a tappet rod drive. It consists of an outer part 2 , in the bore 3 of which an axially movable inner element 4 runs. The inner element 4 and the outer part 2 are urged away from each other by a lost motion spring 5 ( not to be explained in more detail).
  • In the position of the outer part 2 relative to the inner element 4 shown axially apart from one another, their receptacles 6 , 7 are aligned with one another. The receptacle 6 of the outer part 2 is made as a circumferential annular groove. The receptacle 7 in the inner element 4, however, is designed as a radially extending through hole. In this, two diametrically opposite coupling means 8 are arranged, which are designed here as pistons. The coupling means 8 are acted upon radially outwards by the force of a compression spring means 10 (coupling direction). The coupling means 8 can be displaced radially inward, ie in the decoupling direction, via hydraulic means. For this purpose, the outer part 2 expediently has two diametrically opposed oil passages 11 (see FIG. 1). These are made here as a bore and offset by 90 ° to the coupling means 8 in the circumferential direction. The oil passages 11 expediently communicate with two supply lines for hydraulic medium from an environmental construction which cannot be explained in more detail.
  • Furthermore, the person skilled in the art can see from the figures that means 13 for preventing rotation are applied to the outer jacket 12 of the outer part 2 . These are designed as opposing flats. This measure proves necessary on the one hand to connect the oil passages 11 to their corresponding supply lines and on the other hand to align a roller 14 with a cam (not shown).
  • Furthermore, it can be seen that the inner element 4 is also prevented from rotating relative to the outer part of the second For this purpose, an anti-rotation 15 is in the outer part 2 (here designed as a pin) is attached which radially protrudes the outer part 2 in the bore. 3 The inner element 4 in turn has a longitudinal recess 16 facing the anti-rotation device 15 , on the flanks of which the anti-rotation device 15 is guided.
  • The outer part 2 has an annular groove 17 with a stop 18 in a section remote from the bore. Two retaining rings 19 , 20 are snapped into the annular groove 17 . These each form a second and first height stop 21 , 22 . The locking rings 19 , 20 are in total on the stop 18 . The second, lower locking ring 19 serves to secure against loss of a pressure piston 23 of a hydraulic play compensation element 24 , which is built into the inner element 4 . An adjustment of the coupling play of the coupling means 8 in the receptacle 6 surrounding them takes place via the first locking ring 20 , which lies on the second locking ring 19 and is kept available for variable thickness during assembly.
  • It is clear that the pressure piston 23 with the inner element 4 can no longer be pushed out of the bore 3 of the outer part 2 by the force of a compression spring 25 of the play compensation element 24 or the lost motion spring 5 after the second retaining ring 19 has been installed. The pressure piston 23 is thus in contact with the second retaining ring 19 via its edge 26 .
  • Before adjusting the coupling play of the coupling means 8 with respect to their receptacle 6 , this must be determined. This takes place with the coupling means 8 extended. Simply put, the free travel in the receptacle 6 is measured after loading the inner element 4 and thus its displacement in the bore 3 until an underside 27 of the receptacle 6 is reached . It is then relatively easy for the person skilled in the art to use the measured free travel to calculate back at what height a center position of the coupling means 8 in the receptacle 6 has been reached. After this value has been established, a correspondingly thick first retaining ring 20 is snapped into the annular groove 17 directly above the second retaining ring 19 . The lost motion spring 5 thus presses the inner element 4 with its edge 28 against the second locking ring 19 . The coupling play is set in this position (coupling position); Advantageously such that the coupling means 8 in the receptacle 6 has the same small travel paths in both axial directions.
  • Overall, an empty travel that the inner element 4 travels after the coupling with the outer part 2 and when cam loading begins relative to the outer part 2 with the coupling means 8 in the receptacles 6 can be kept uniformly small over a series of switching elements 1 in internal combustion engines of the same type , A too large and undesirable variance of the tax times is excluded. Reference numbers 1 switching element
    2 outer part
    3 hole
    4 interior element
    5 lost motion pen
    6 Exterior part holder
    7 Inner part holder
    8 coupling means
    9 not awarded
    10 pressure spring means
    11 oil passage
    12 outer jacket
    13 means
    14 roll
    15 anti-rotation device
    16 longitudinal recess
    17 ring groove
    18 stop
    19 circlip
    20 circlip
    21 height stop
    22 height stop
    23 pressure pistons
    24 Game compensation element
    25 compression spring
    26 rim pressure piston
    27 bottom
    28 edge inner element

Claims (8)

1. switching element ( 1 ) for a valve train of an internal combustion engine, preferably for valve shutdown, with an outer part ( 2 ) and an axially movable inner element ( 4 ) in its bore ( 3 ), the outer part ( 2 ) and the inner element ( 4 ) in an axially distant relative position achieved by a lost motion spring ( 5 ) each have at least one receptacle ( 6 , 7 ) aligned with one another, one or more displaceable coupling means ( 8 ) for coupling the inner element in one of the receptacles in the direction of the other receptacle ( 4 ) are applied with the outer part ( 2 ) in the position relative to one another, a first height stop ( 22 ) for defining the relative position being applied between the inner element ( 4 ) and the outer part ( 2 ) and with an inside element ( 4 ) hydraulic lash adjuster ( 24 ) with a pressure piston ( 23 ) is installed, which pressure piston ( 23 ) axially out of this through a second height a nschlag is fixed (21), characterized in that the height of the stops (21, 22) are designed as at least a ring-like element such as a securing ring (19, 20) and arranged above one another lying in the bore (3) of the outer part (2), the lower retaining ring ( 19 ) forms the second height stop ( 21 ) and the overlying first locking ring ( 20 ) forms the first height stop ( 22 ) when viewed in the bore ( 3 ) of the outer part ( 2 ), the locking rings ( 20 , 19 ) variable first and constant thickness second retaining rings ( 20 , 19 ) are provided and the retaining ring assembly ( 20 , 19 ) via the first retaining ring ( 20 ) out of the bore ( 3 ) at a stop ( 18 ) such as a ring shoulder of the bore ( 3 ) is present.
2. Switching element according to claim 1, characterized in that two pistons are provided as coupling means ( 8 ) which run in the receptacle ( 7 ) of the inner element ( 4 ) and are diametrically opposed there.
3. Switching element according to claim 2, characterized in that the receptacle ( 6 ) of the outer part ( 2 ) is made as an annular groove in its bore ( 3 ), the annular groove of two opposing oil passages ( 11 ) such as bores in the outer part ( 2 ) is cut and the inner element ( 4 ) is guided via an anti-rotation device ( 15 ) in the bore ( 3 ) of the outer part ( 2 ).
4. Switching element according to claim 3, characterized in that a radially projecting element such as a pin is arranged as an anti-rotation device ( 15 ), which is fastened in the outer part ( 2 ) or inner element ( 4 ) and in a longitudinal recess ( 16 ) of the opposite component (inner element ( 4 ) or outer part ( 2 )) is guided.
5. Switching element according to claim 1, characterized in that the outer part ( 2 ) has means ( 13 ) for guiding the entire switching element ( 1 ) against rotation relative to an environmental structure.
6. Switching element according to claim 5, characterized in that the means ( 13 ) for guiding against rotation consist of one or more flats on the outer casing ( 12 ) of the outer part ( 2 ).
7. Switching element according to claim 1, characterized in that the switching element ( 1 ) is made as a cam follower in a push rod drive.
8. A method for adjusting the coupling play in a switching element ( 1 ) according to the features of the preamble of claim 1, wherein at least one ring-like element such as a retaining ring ( 19 , 20 ) is provided as the height stop ( 21 , 22 ), the bore ( 3 ) of the outer part (2) has a bore distant stop (18) as has an annular shoulder and at least one piston is provided as a coupling means (8) which passes the inner element (4) in the formed as a radial bore receptacle (7), comprising the following steps, where further steps can also be temporarily stored:
a) snapping the at least one second locking ring ( 19 ) into an area axially below the stop ( 18 ) such that the pressure piston ( 23 ) of the clearance compensation element ( 24 ) with its bore-distant edge ( 26 ) via the force of a compression spring ( 25 ) of the Play compensation elements ( 24 ) against the second locking ring ( 19 ) and this is pressed against the stop ( 18 );
b) moving the inner element ( 4 ) with the coupling means ( 8 ) extended into the receptacle ( 6 ) of the outer part ( 2 ) in the direction of the bore until the coupling means ( 8 ) rests on an underside ( 27 ) of the receptacle ( 6 );
c) Measuring the distance traveled by the inner element ( 4 ) with coupling means ( 8 ) up to the contact on the underside ( 27 ) and
d) pairing the at least one first locking ring ( 20 ) with a thickness such that when it subsequently snaps into an area axially below the stop ( 18 ), in contact with the second locking ring ( 19 ), the inner element ( 4 ) over the second Circlip ( 19 ) is shifted such that the coupling means ( 8 ) is at least equally spaced from the receptacle ( 6 ) in both axial directions.
DE10204672A 2002-02-06 2002-02-06 Valve-actuating switch element has two securing rings, thickness of one of which can be varied Withdrawn DE10204672A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10204672A DE10204672A1 (en) 2002-02-06 2002-02-06 Valve-actuating switch element has two securing rings, thickness of one of which can be varied

Applications Claiming Priority (14)

Application Number Priority Date Filing Date Title
DE10204672A DE10204672A1 (en) 2002-02-06 2002-02-06 Valve-actuating switch element has two securing rings, thickness of one of which can be varied
CA2470834A CA2470834C (en) 2002-02-06 2003-01-15 Switch element for valve actuation in an internal combustion engine
AU2003205602A AU2003205602A1 (en) 2002-02-06 2003-01-15 Switch element for valve actuation in an internal combustion engine
AT03702437T AT300665T (en) 2002-02-06 2003-01-15 Switching element for a valve transmission of an internal combustion engine
EP03702437A EP1472438B1 (en) 2002-02-06 2003-01-15 Switch element for valve actuation in an internal combustion engine
PCT/EP2003/000307 WO2003067038A1 (en) 2002-02-06 2003-01-15 Switch element for valve actuation in an internal combustion engine
DE2003500859 DE50300859D1 (en) 2002-02-06 2003-01-15 Switching element for a valve transmission of an internal combustion engine
ES03702437T ES2243886T3 (en) 2002-02-06 2003-01-15 Switching element for a valve drive of an internal combustion engine.
MXPA04006988A MXPA04006988A (en) 2002-02-06 2003-01-15 Switch element for valve actuation in an internal combustion engine.
US10/498,481 US7464680B2 (en) 2002-02-06 2003-01-15 Switching element for a valve train of an internal combustion engine
US11/088,776 US6997154B2 (en) 2002-02-06 2005-03-25 Switch element
US11/402,904 US7207303B2 (en) 2002-02-06 2006-04-13 Switching element
US11/415,074 US7210439B2 (en) 2002-02-06 2006-05-02 Switching element for a valve train of an internal combustion engine
US12/272,567 US20090145391A1 (en) 2002-02-06 2008-11-17 Switching element for a valve train of an internal combustion engine

Publications (1)

Publication Number Publication Date
DE10204672A1 true DE10204672A1 (en) 2003-08-07

Family

ID=7713704

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10204672A Withdrawn DE10204672A1 (en) 2002-02-06 2002-02-06 Valve-actuating switch element has two securing rings, thickness of one of which can be varied

Country Status (1)

Country Link
DE (1) DE10204672A1 (en)

Cited By (21)

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DE102004061680A1 (en) * 2004-12-22 2006-08-03 Schaeffler Kg Valve train for internal combustion engine has anti-twist bridge in which contact surface is formed which delimits each receptacle area for roller tappet on opposite side of tappet roller
DE102005003745A1 (en) * 2005-01-27 2006-08-10 Schaeffler Kg Switch-off support for valve drive in internal combustion engine has piston moving into decoupling position through hydraulic fluid directed out from socket of inner element to in front of its inner end side
DE102005020580A1 (en) * 2005-05-03 2006-11-16 Schaeffler Kg Switchable cam follower
DE102007005302A1 (en) * 2007-02-02 2008-08-07 Schaeffler Kg Switchable bucket tappets
DE102007008574A1 (en) * 2007-02-19 2008-08-21 Schaeffler Kg Switchable bucket tappets
DE102007011893A1 (en) * 2007-03-13 2008-09-18 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102007011892A1 (en) * 2007-03-13 2008-09-18 Schaeffler Kg Switchable support element for a valve train of an internal combustion engine
DE102008052279A1 (en) 2008-10-18 2010-04-22 Schaeffler Kg Switchable component for a valve train of an internal combustion engine
DE102009035143A1 (en) 2009-07-29 2011-02-03 Schaeffler Technologies Gmbh & Co. Kg Switchable component of a valve train of an internal combustion engine
US7921823B2 (en) 2004-05-13 2011-04-12 Schaeffler Kg Hydraulic play compensation device
US7931001B2 (en) 2006-02-22 2011-04-26 Schaeffler Technologies Gmbh & Co. Kg Valve train of an internal combustion engine having a cylindrical valve tappet
DE102011004330A1 (en) 2011-02-17 2012-08-23 Schaeffler Technologies Gmbh & Co. Kg Switchable element for valve train of internal combustion engine, comprises housing, which is arranged in guide bore of internal combustion engine, in which inner element runs in bore hole in axially movable manner
DE102012202569A1 (en) 2012-02-20 2013-08-22 Schaeffler Technologies AG & Co. KG Switchable plunger for valve drive of internal combustion engine, has limiting element that is axially arranged between inner shell of shirt-like element and outer shell of inner element
WO2014173402A1 (en) 2013-04-24 2014-10-30 Schaeffler Technologies Gmbh & Co. Kg Switchable support element
WO2014183749A1 (en) 2013-05-15 2014-11-20 Schaeffler Technologies Gmbh & Co. Kg Switchable support element
DE102013222078A1 (en) 2013-10-30 2015-04-30 Schaeffler Technologies Gmbh & Co. Kg transport safety
DE102013222850A1 (en) 2013-11-11 2015-05-13 Schaeffler Technologies Gmbh & Co. Kg Safety or snap rings with a transport lock
DE102013222848A1 (en) 2013-11-11 2015-05-13 Schaeffler Technologies Gmbh & Co. Kg Transport lock for securing or snap rings
DE102014214449A1 (en) 2014-07-23 2016-01-28 Schaeffler Technologies AG & Co. KG Process for producing slotted rings
US9458942B2 (en) 2012-05-25 2016-10-04 Schaeffler Technologies AG & Co. KG Control valve for a camshaft adjuster
AT518408B1 (en) * 2016-04-05 2017-10-15 Avl List Gmbh Valve control device for at least one gas changing valve

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DE4206166A1 (en) * 1991-03-14 1992-09-17 Volkswagen Ag Variable valve drive with cams driving inner and outer valve stems - has stems coupled by radially sliding pistons in outer stem, engaging inner stem stops during the cam base circle phase
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Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7921823B2 (en) 2004-05-13 2011-04-12 Schaeffler Kg Hydraulic play compensation device
DE102004061680A1 (en) * 2004-12-22 2006-08-03 Schaeffler Kg Valve train for internal combustion engine has anti-twist bridge in which contact surface is formed which delimits each receptacle area for roller tappet on opposite side of tappet roller
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