EP2208868A2 - Switchable tappet - Google Patents
Switchable tappet Download PDFInfo
- Publication number
- EP2208868A2 EP2208868A2 EP09178953A EP09178953A EP2208868A2 EP 2208868 A2 EP2208868 A2 EP 2208868A2 EP 09178953 A EP09178953 A EP 09178953A EP 09178953 A EP09178953 A EP 09178953A EP 2208868 A2 EP2208868 A2 EP 2208868A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- receptacle
- outer body
- inner part
- cam
- 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
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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
- F01L1/12—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
- F01L13/0015—Modifications 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
- F01L13/0036—Modifications 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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
Definitions
- the invention relates to a switchable bucket tappets for a valve train of an internal combustion engine, with an outer body having a ring-like, designed for a nanohubnockentag floor, protruding from the outer edge of a hollow cylindrical shirt, wherein leads away from an inner edge of the bottom a hollow cylindrical approach, in the bore is guided to the outer body relatively axially movable inner part with its outer jacket, the bottom of a start of a low-lift cam and the bottom side remote serves as a plant for a gas exchange valve, wherein run in the tappet coupling means for a full valve lift [circuit on the or the virtuallyhubnocken], out of a receptacle of one of the components, sections in or on a driver surface of the respective other component can be displaced, wherein the coupling means for a contrast smaller valve lift [circuit on the low lift cam] run in the receptacle, wherein the outer body is acted upon by a lost-motion spring in the cam direction and wherein the outer jacket of the shirt pro
- a generic bucket tappet is from the DE 44 92 633 C1 previously known.
- a disadvantage of this is that a bottom whose inner part offers only a relatively small area for emigration of a low-lift cam on contact due to its small diameter. Because of this, only relatively small strokes can be driven in the shutdown mode.
- the object of the invention is therefore to provide a switchable bucket tappet of the aforementioned type, by the same dimensions in the decoupled state, a larger partial stroke can be realized.
- this object is achieved in that the bottom of the inner member has two diametrically opposite, directly on the bottom edge region of the outer sheath tethered segments to form a rectangular in plan view increased contact surface for the low lift cams, wherein the segments sunk in a complementary pocket in the bottom of the outer body extend and wherein in coupling either the floors at least approximately flush with each other or only slightly protrudes from one floor over the other bottom.
- the proposed tappet is conceivable and provided for Hubumscnies in quality or quantity controlled internal combustion engines.
- An application also relates to internal combustion engines with HCCI combustion process.
- the inventively enlarged bottom of the inner part in approximately or completely flush with the bottom of the outer body in coupling (cam base circle) runs.
- the bottom surfaces can be kept aligned with each other for the grinding process.
- Another advantage of the solution according to the invention is that the bucket tappet with an increased stroke in Entkoppelmodus has a same height as previously executed bucket tappets.
- the bottom of the inner part protrudes very slightly beyond the bottom of the outer body at Nockengrund réelle belauf. This supernatant is advantageously, however, significantly less than half the floor thickness.
- the bag in the bottom of the outer body may be shown according to an appropriate subclaim as diametrically continuous indentation, which is limited only by extending parallel to the Nockenauswa minimumscardi sidewalls.
- This variant is particularly easy to manufacture and it comes, for example, in a sheet metal training, not to unnecessary material recesses or accumulations. Possibly.
- the radially outer end faces of the segments can also be covered by the pocket.
- both bottoms of the cup tappet are cylindrically bulged in the direction of cam migration.
- another contribution is made in the direction of increasing the cam contact patch.
- the receiving / driving surface for the at least one coupling agent immediately below the trays.
- a coupling agent for example, thought of at least one piston, but it is more convenient, a total of two To arrange pistons, which may be present as a slide package, for example.
- the receiving / driving surface can also extend on a well spaced from the bottom axial portion of the tappet. It is also conceivable and envisaged that an axial line of the receiving / driving surface is not radial but secant-like or skewed in the bucket tappet.
- other coupling means are conceivable and provided at this point, for example, balls, wedges, rollers, etc.
- the one or more coupling means may be locked in the pressureless state and occupy their EntkoppelMap only with applied hydraulic fluid pressure. Likewise, it is provided to represent an unlocking in the pressureless state, in which case a locking is realized at applied hydraulic fluid pressure.
- this helical compression spring can also be supported directly on a cylinder head side component.
- a switchable tappets 1 This consists of an outer body 2, the cam side has a ring-like bottom 3. Of a Outer edge 4 of the bottom 3 is a thin-walled shirt 5 from, the one off FIG. 2 has apparent rotation 20 has.
- the bottom 3 of the outer body 2 is contacted by two spaced highly-lift cam between them, which acts on the bottom 11 of the inner part 9.
- the arrow in FIG. 2 (AN) stands for an emigration direction of the cams on the bottoms 3, 11.
- FIG. 1 Furthermore goes out FIG. 1 that immediately below the bottoms 3, 11 recordings 14, 15 and driving surfaces 16, 17 extend for coupling means 13.
- the piston 13a is seated in the receptacle 14 of the outer body 2 (left side) and, in the case of a cam base circle passage, lies directly opposite its inner side 24 to a first outer end 25 of the second piston 13b.
- the latter extends almost or completely over an entire width of the inner part 9.
- a second outer end 28 of the second piston 13b is displaced in the coupling case in sections in a driver surface 17 in the outer body 2, for which purpose the first piston 13a engages in sections in the driver surface 16 of the inner part 9 while simultaneously displacing the second piston 13b.
- a displacement of the coupling agent packet 13a, 13b in the aforementioned coupling direction takes place by acting on a pressure chamber 26, which lies radially outwardly in front of an outer side 27 of the first piston 13a.
- a provision [decoupling] is provided by the force of at least one compression spring 29, which in sections comprises an outer jacket 30 of the second piston 13b and facing with its one end to a first piston 13a Ring collar 31 of the second piston 13b and with its other end to an annular shoulder 32 of the receptacle 15 is supported.
- FIGS. 1, 3 This is designed as a helical compression spring and acts with its one end on a plate 33 which is fixed to the outer jacket 10 of the inner part 9 cam remote. With its other end, it acts indirectly against a bottom 34 of the outer body. 2
- the bottom 11 of the inner member 9 has two diametrically opposite, directly on the bottom-side edge portion 21 of the outer shell 10 tethered segments 22.
- the latter sit in a complementary pocket 23 b of the outer body 2.
- the pocket 23 b is drawn diametrically throughout, thus the bottom 11 with the Segments 22 extends between lying parallel to the direction of cam-out sidewalls 35.
- the bottoms 3, 11 in the cam base circle are approximately flush with one another, so that grinding is possible here, for example in one operation.
- both bottoms 3, 11 are cylindrically bulged in the cam migration direction AN, which is a further contribution towards increasing the cam contact surface.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Die Erfindung betrifft einen schaltbarer Tassenstößel für einen Ventiltrieb einer Brennkraftmaschine, mit einem Außenkörper, der einen ringähnlichen, für einen Großhubnockenkontakt ausgebildeten Boden hat, von dessen Außenrand ein hohlzylindrisches Hemd absteht, wobei von einem Innenrand des Bodens ein hohlzylindrischer Ansatz wegführt, in dessen Bohrung ein zu dem Außenkörper relativ axial bewegliches Innenteil mit seinem Außenmantel geführt ist, dessen Boden einem Anlauf eines Niedrighubnockens sowie dessen bodenabgewandte Seite als Anlage für ein Gaswechselventil dient, wobei im Tassenstößel Koppelmittel verlaufen, die für einen vollen Ventilhub [Schaltung auf den oder die Großhubnocken], aus einer Aufnahme eines der Bauteile heraus, abschnittsweise in oder auf eine Mitnehmerfläche des jeweils anderen Bauteils verlagerbar sind, wobei die Koppelmittel für einen demgegenüber kleineren Ventilhub [Schaltung auf den Niedrighubnocken] in der Aufnahme verlaufen, wobei der Außenkörper durch eine Lost-Motion-Feder in Nockenrichtung beaufschlagt ist und wobei vom Außenmantel des Hemdes eine Verdrehsicherung absteht.The invention relates to a switchable bucket tappets for a valve train of an internal combustion engine, with an outer body having a ring-like, designed for a Großhubnockenkontakt floor, protruding from the outer edge of a hollow cylindrical shirt, wherein leads away from an inner edge of the bottom a hollow cylindrical approach, in the bore is guided to the outer body relatively axially movable inner part with its outer jacket, the bottom of a start of a low-lift cam and the bottom side remote serves as a plant for a gas exchange valve, wherein run in the tappet coupling means for a full valve lift [circuit on the or the Großhubnocken], out of a receptacle of one of the components, sections in or on a driver surface of the respective other component can be displaced, wherein the coupling means for a contrast smaller valve lift [circuit on the low lift cam] run in the receptacle, wherein the outer body is acted upon by a lost-motion spring in the cam direction and wherein the outer jacket of the shirt protrudes an anti-rotation.
Ein gattungsgemäßer Tassenstößel ist aus der
Aufgabe der Erfindung ist es daher, einen schaltbaren Tassenstößel der vorgenannten Art zu schaffen, durch den bei gleichen Abmessungen im entkoppelten Zustand ein größerer Teilhub realisierbar ist.The object of the invention is therefore to provide a switchable bucket tappet of the aforementioned type, by the same dimensions in the decoupled state, a larger partial stroke can be realized.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass der Boden des Innenelements zwei sich diametral gegenüberliegende, direkt am bodenseitigen Randbereich dessen Außenmantels angebundene Segmente zur Bildung einer in Draufsicht rechteckähnlich vergrößerten Anlauffläche für den Niedrighubnocken aufweist, wobei die Segmente in einer komplementären Tasche im Boden des Außenkörpers versenkt verlaufen und wobei bei Kopplung entweder die Böden zumindest in etwa bündig zueinander verlaufen oder lediglich geringfügig der eine Boden über den jeweils anderen Boden hinaussteht.According to the invention, this object is achieved in that the bottom of the inner member has two diametrically opposite, directly on the bottom edge region of the outer sheath tethered segments to form a rectangular in plan view increased contact surface for the low lift cams, wherein the segments sunk in a complementary pocket in the bottom of the outer body extend and wherein in coupling either the floors at least approximately flush with each other or only slightly protrudes from one floor over the other bottom.
Somit liegt ein Tassenstößel der eingangs genannten Art vor, bei dem die zitierten Nachteile beseitigt sind. Aufgrund der lappenartigen, an den Boden des Innenelements angebundenen Segmente, welche diesem Boden in Draufsicht eine rechteckähnliche Geometrie verleihen, ist die Auswanderungsfläche des Nockens bei Kontakt deutlich vergrößert. Somit können im Entkoppelmodus größere Teilhübe als bis dato ausgeführt gefahren werden.Thus, there is a bucket tappet of the type mentioned, in which the cited disadvantages are eliminated. Due to the flap-like, attached to the bottom of the inner member segments, which give this ground in plan view a rectangular-like geometry, the emigration surface of the cam is significantly increased in contact. Thus, in the decoupling mode, larger partial strokes can be carried out than up to now.
Der vorgeschlagene Tassenstößel ist zur Hubumschaltung bei qualitäts- oder quantitätsgeregelten Brennkraftmaschinen denkbar und vorgesehen. Ein Einsatz bezieht sich auch auf Brennkraftmaschinen mit HCCI-Brennverfahren.The proposed tappet is conceivable and provided for Hubumschaltung in quality or quantity controlled internal combustion engines. An application also relates to internal combustion engines with HCCI combustion process.
Besonders vorteilhaft ist es in diesem Kontext, wenn der erfindungsgemäß vergrößerte Boden des Innenteils in etwa oder vollständig bündig zu dem Boden des Außenkörpers bei Kopplung (Nockengrundkreis) verläuft. Somit liegt bspw. eine "glatte" Fläche für eine Schleifbearbeitung in einem Arbeitsgang vor. Ggf. können für den Schleifvorgang die Bodenflächen zueinander fluchtend gehalten werden. Ein weiterer Vorteil der erfindungsgemäßen Lösung ist es, dass der Tassenstößel bei vergrößertem Hub im Entkoppelmodus eine gleiche Bauhöhe wie bisher ausgeführte Tassenstößel hat. Es ist jedoch auch möglich und vorgesehen, dass bspw. der Boden des Innenteils bei Nockengrundkreisdurchlauf ganz geringfügig über den Boden des Außenkörpers hinaussteht. Dieser Überstand ist vorteilhafterweise jedoch deutlich geringer als eine halbe Bodendicke.It is particularly advantageous in this context if the inventively enlarged bottom of the inner part in approximately or completely flush with the bottom of the outer body in coupling (cam base circle) runs. Thus, for example, there is a "smooth" surface for grinding in one operation. Possibly. For example, the bottom surfaces can be kept aligned with each other for the grinding process. Another advantage of the solution according to the invention is that the bucket tappet with an increased stroke in Entkoppelmodus has a same height as previously executed bucket tappets. However, it is also possible and provided that, for example, the bottom of the inner part protrudes very slightly beyond the bottom of the outer body at Nockengrundkreisdurchlauf. This supernatant is advantageously, however, significantly less than half the floor thickness.
Die Tasche im Boden des Außenkörpers kann gemäß einem zweckmäßigen Unteranspruch als diametral durchgehende Einformung dargestellt sein, die lediglich durch parallel zur Nockenauswanderungsrichtung verlaufende Seitenwände begrenzt ist. Diese Variante ist fertigungstechnisch besonders einfach und es kommt, beispielsweise bei einer Blechausbildung, nicht zu unnötigen Materialvertiefungen bzw. -anhäufungen. Ggf. können auch die radial außen liegenden Stirnseiten der Segmente von der Tasche umfasst sein.The bag in the bottom of the outer body may be shown according to an appropriate subclaim as diametrically continuous indentation, which is limited only by extending parallel to the Nockenauswanderungsrichtung sidewalls. This variant is particularly easy to manufacture and it comes, for example, in a sheet metal training, not to unnecessary material recesses or accumulations. Possibly. The radially outer end faces of the segments can also be covered by the pocket.
Besonders vorteilhaft ist es, wenn beide Böden des Tassenstößels in Nockenauswanderungsrichtung zylindrisch ausgewölbt sind. Somit ist ein weiterer Beitrag in Richtung Vergrößerung der Nockenaufstandsfläche geleistet.It is particularly advantageous if both bottoms of the cup tappet are cylindrically bulged in the direction of cam migration. Thus, another contribution is made in the direction of increasing the cam contact patch.
In Fortbildung der Erfindung ist es vorgeschlagen, die Aufnahme/Mitnehmerfläche für das wenigstens eine Koppelmittel unmittelbar unterhalb der Böden zu applizieren. Als Koppelmittel ist beispielsweise an wenigstens einen Kolben gedacht, wobei es jedoch zweckmäßiger ist, insgesamt zwei Kolben anzuordnen, die beispielsweise als Schieberpaket vorliegen können. Alternativ hierzu können die Aufnahme/Mitnehmerfläche auch auf einem deutlich vom Boden beabstandeten Axialabschnitt des Tassenstößels verlaufen. Auch ist es denkbar und vorgesehen, dass eine Axiallinie der Aufnahme/Mitnehmerfläche nicht radial, sondern sekantenartig oder windschief im Tassenstößel verläuft. Gleichfalls sind an dieser Stelle auch andere Koppelmittel denkbar und vorgesehen, so beispielsweise auch Kugeln, Keile, Rollen etc.In a further development of the invention, it is proposed to apply the receiving / driving surface for the at least one coupling agent immediately below the trays. As a coupling agent, for example, thought of at least one piston, but it is more convenient, a total of two To arrange pistons, which may be present as a slide package, for example. Alternatively, the receiving / driving surface can also extend on a well spaced from the bottom axial portion of the tappet. It is also conceivable and envisaged that an axial line of the receiving / driving surface is not radial but secant-like or skewed in the bucket tappet. Likewise, other coupling means are conceivable and provided at this point, for example, balls, wedges, rollers, etc.
Das oder die Koppelmittel können im drucklosen Zustand verriegelt vorliegen und erst bei anliegendem Hydraulikmitteldruck ihren Entkoppelzustand einnehmen. Gleichfalls ist es vorgesehen, im drucklosen Zustand eine Entriegelung darzustellen, wobei dann bei anliegendem Hydraulikmitteldruck eine Verriegelung realisiert ist.The one or more coupling means may be locked in the pressureless state and occupy their Entkoppelzustand only with applied hydraulic fluid pressure. Likewise, it is provided to represent an unlocking in the pressureless state, in which case a locking is realized at applied hydraulic fluid pressure.
Schließlich ist es vorgeschlagen, als Lost-Motion-Feder wenigstens eine das Innenteil konzentrisch umfassende Schraubendruckfeder vorzusehen. Gegebenenfalls kann sich diese Schraubendruckfeder auch direkt auf einem zylinderkopfseitigen Bauteil abstützen.Finally, it is proposed to provide, as a lost-motion spring, at least one helical compression spring which concentrically surrounds the inner part. Optionally, this helical compression spring can also be supported directly on a cylinder head side component.
Die Erfindung ist anhand der Zeichnung näher erläutert. Es zeigen:
-
einen Längsschnitt durch einen Tassenstößel mit Koppel kolben;Figur 1 -
eine Draufsicht auf den Tassenstößel nachFigur 2 und dieFigur 1 -
den Schnitt nachFigur 3 , jedoch um 90° gedreht.Figur 1
-
FIG. 1 a longitudinal section through a tappet with coupling piston; -
FIG. 2 a plan view of the bucket tappet behindFIG. 1 and the -
FIG. 3 the cut afterFIG. 1 , but rotated by 90 °.
Dargestellt ist ein schaltbarer Tassenstößel 1. Dieser besteht aus einem Außenkörper 2, der nockenseitig einen ringähnlichen Boden 3 hat. Von einem Außenrand 4 des Bodens 3 steht ein dünnwandiges Hemd 5 ab, das eine aus
Von einem Innenrandes 6 des Bodens 3 führt in nockenferne Richtung ein hohlzylindrischer Ansatz 7 mit einer Bohrung 8. In Letztgenannter ist ein hierzu relativ axial bewegliches Innenteil 9 mit seinem Außenmantel 10 aufgenommen. Das Innenteil 9 hat einen Boden 11, der bei Nockengrundkreisdurchlauf und im Koppelzustand in etwa bündig mit dem vorgenannten Boden 3 abschließt (siehe nachfolgende Erläuterungen).From an
Der Boden 3 des Außenkörpers 2 ist von zwei beabstandeten Großhubnocken kontaktierbar, die zwischen sich einen Niedrighubnocken einschließen, welcher auf den Boden 11 des Innenteils 9 einwirkt. Die Pfeilangabe in
Des Weiteren geht aus
Eine Verschiebung des Koppelmittelpaket 13a, 13b in die vorgenannte Koppelrichtung erfolgt über Beaufschlagung einer Druckkammer 26, die radial außen vor einer Außenseite 27 des ersten Kolbens 13a liegt. Eine Rückstellung [Entkopplung] ist über die Kraft wenigstens einer Druckfeder 29 vorgesehen, die abschnittsweise einen Außenmantel 30 des zweiten Kolbens 13b umfasst und sich mit ihrem einen Ende an einem dem ersten Kolben 13a zugewandten Ringkragen 31 des zweiten Kolbens 13b und mit ihrem anderen Ende an einem Ringabsatz 32 der Aufnahme 15 abstützt.A displacement of the coupling agent packet 13a, 13b in the aforementioned coupling direction takes place by acting on a
Des weiteren offenbaren die
Der Boden 11 des Innenelements 9 hat zwei sich diametral gegenüberliegende, direkt am bodenseitigen Randbereich 21 des Außenmantels 10 angebundene Segmente 22. Letztgenannte sitzen in einer komplementären Tasche 23b des Außenkörpers 2. Die Tasche 23b ist diametral durchgehend gezeichnet, wobei somit der Boden 11 mit den Segmenten 22 zwischen parallel zur Nockenauswanderungsrichtung liegenden Seitenwänden 35 verläuft. Des Weiteren ist zu erkennen, dass die Böden 3, 11 im Nockengrundkreis in etwa bündig zueinander sind, so dass hier eine Schleifbearbeitung beispielsweise in einem Arbeitsgang ermöglicht ist.The bottom 11 of the
Aufgrund der über die bündigen Segmente 22 erzielten Verlängerung der Auswanderungsfläche für den Niedrighubnocken auf dem Boden 11 kann ein größerer Ventilhub/Gaswechselquerschnitt im Entkoppelmodus [Niedrighubnocken aktiv] erzielt werden.Due to the extension of the emigration surface for the low lift cam on the
Wie
- 1) Tassenstößel1) Cup tappets
- 2) Außenkörper2) outer body
- 3) Boden3) floor
- 4) Außenrand4) outer edge
- 5) Hemd5) shirt
- 6) Innenrand6) inner edge
- 7) Ansatz7) approach
- 8) Bohrung8) bore
- 9) Innenteil9) inner part
- 10)Außenmantel10) outer shell
- 11)Boden11) Soil
- 12)bodenabgewandte Seite12) side facing away from the floor
- 13)Koppelmittel13) coupling means
- 13a) erster Kolben13a) first piston
- 13b) zweiter Kolben13b) second piston
- 14)Aufnahme14) Recording
- 15)Aufnahme15) Recording
- 16)Mitnehmerfläche16) camming
- 17)Mitnehmerfläche17) camming
- 18)Lost-Motion-Feder18) Lost-motion spring
- 19)Außenmantel19) outer shell
- 20)Verdrehsicherung20) anti-rotation
- 21)Randbereich21) the edge area
- 22)Segment22) Segment
- 23)Anlauffläche23) stop face
- 23b)Tasche23b) Bag
- 24)Innenseite24) inside
- 25)erste Außenstirn25) first outer forehead
- 26)Druckkammer26) pressure chamber
- 27)Außenseite27) outside
- 28)zweite Außenstirn28) second outer forehead
- 29)Druckfeder29) compression spring
- 30)Außenmantel30) outer shell
- 31)Ringkragen31) annular collar
- 32)Ringabsatz32) annular shoulder
- 33)Teller33) Plate
- 34)Unterseite34) Base
- 35)Seitenwand35) side wall
- AN) Auswanderungsrichtung NiedrighubnockenAN) Emigration direction low-lift cams
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910004746 DE102009004746A1 (en) | 2009-01-15 | 2009-01-15 | Switchable bucket tappets |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2208868A2 true EP2208868A2 (en) | 2010-07-21 |
EP2208868A3 EP2208868A3 (en) | 2010-08-11 |
EP2208868B1 EP2208868B1 (en) | 2015-02-25 |
Family
ID=42107853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090178953 Not-in-force EP2208868B1 (en) | 2009-01-15 | 2009-12-11 | Switchable tappet |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2208868B1 (en) |
CN (1) | CN101813011B (en) |
DE (1) | DE102009004746A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011085239A1 (en) * | 2011-10-26 | 2013-05-02 | Schaeffler Technologies AG & Co. KG | Roller plunger for use in e.g. high-pressure fuel pump of combustion engine, has housing guided in component hole over outer jacket, which is curved-out of housing, where edge region of housing is provided with slippage chamfer |
DE102017101806A1 (en) | 2017-01-31 | 2018-08-02 | Schaeffler Technologies AG & Co. KG | Switchable bucket tappets |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5345904A (en) * | 1990-02-16 | 1994-09-13 | Group Lotus | Valve control means |
US5709180A (en) * | 1997-02-06 | 1998-01-20 | General Motors Corporation | Narrow cam two-step lifter |
DE4492633C1 (en) * | 1993-05-04 | 2001-05-31 | Schaeffler Waelzlager Ohg | Valve lifter for IC engine |
DE10055595A1 (en) * | 2000-11-09 | 2002-05-29 | Ina Schaeffler Kg | The cylinder shutoff has cylinders with gas exchange valves, cam shaft, driven by crank shaft, two cams, and valve drive element |
US6457445B1 (en) * | 2000-05-23 | 2002-10-01 | Mitsubishi Denki Kabushiki Kaisha | Valve lift control device |
JP2003148117A (en) * | 2001-11-16 | 2003-05-21 | Nissan Motor Co Ltd | Variable valve system for internal combustion engine |
-
2009
- 2009-01-15 DE DE200910004746 patent/DE102009004746A1/en not_active Withdrawn
- 2009-12-11 EP EP20090178953 patent/EP2208868B1/en not_active Not-in-force
-
2010
- 2010-01-08 CN CN201010002528.4A patent/CN101813011B/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5345904A (en) * | 1990-02-16 | 1994-09-13 | Group Lotus | Valve control means |
DE4492633C1 (en) * | 1993-05-04 | 2001-05-31 | Schaeffler Waelzlager Ohg | Valve lifter for IC engine |
US5709180A (en) * | 1997-02-06 | 1998-01-20 | General Motors Corporation | Narrow cam two-step lifter |
US6457445B1 (en) * | 2000-05-23 | 2002-10-01 | Mitsubishi Denki Kabushiki Kaisha | Valve lift control device |
DE10055595A1 (en) * | 2000-11-09 | 2002-05-29 | Ina Schaeffler Kg | The cylinder shutoff has cylinders with gas exchange valves, cam shaft, driven by crank shaft, two cams, and valve drive element |
JP2003148117A (en) * | 2001-11-16 | 2003-05-21 | Nissan Motor Co Ltd | Variable valve system for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
DE102009004746A1 (en) | 2010-07-22 |
EP2208868A3 (en) | 2010-08-11 |
CN101813011B (en) | 2014-07-23 |
EP2208868B1 (en) | 2015-02-25 |
CN101813011A (en) | 2010-08-25 |
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