WO2009024390A1 - Switchable tapper for a valve train of an internal combustion engine - Google Patents

Switchable tapper for a valve train of an internal combustion engine Download PDF

Info

Publication number
WO2009024390A1
WO2009024390A1 PCT/EP2008/058580 EP2008058580W WO2009024390A1 WO 2009024390 A1 WO2009024390 A1 WO 2009024390A1 EP 2008058580 W EP2008058580 W EP 2008058580W WO 2009024390 A1 WO2009024390 A1 WO 2009024390A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling
bore
tappet
housing
ring
Prior art date
Application number
PCT/EP2008/058580
Other languages
German (de)
French (fr)
Inventor
Mario Kuhl
Norbert Nitz
Sandra SCHÄFER
Lucia Hinkovska
Andreas Kufner
Original Assignee
Schaeffler 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
Priority to US95110707P priority Critical
Priority to US60/951,107 priority
Application filed by Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2009024390A1 publication Critical patent/WO2009024390A1/en

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
    • F01L1/143Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L13/0036Modifications 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00Preventing the rotation of tappets

Abstract

The invention relates to a switchable tappet (1) for a valve train of an internal combustion engine, with a housing (3), which has a ring-like cam stop bottom (2) and from the outer edge (4) of which a skirt(5) protrudes and from the inner wall (6) of which a hollow cylindrical shoulder (7) with a borehole (8) protrudes, in which an inner part (9), which can be moved axially relative to housing (3), extends, wherein, in a borehole (11) of the inner part (9), coupling means (12) are applied which, for a complete valve lift, can be brought sectionally into engagement with a dog surface (13) of the housing (3), wherein an inner part (9) is produced essentially as a thin-walled tube section, which is open at both ends and bridged by a transverse bridge (15) with the borehole (11), wherein, as coupling means (12), only a piston, secured against rotating, is provided, which can be located in the coupling direction over at least one compression spring (17) and, in the uncoupling direction, over hydraulic means, which piston, starting out from its face (18) on the coupling side, is provided at the upper side (19) with a sectional flattening (20), over which, in the coupling case, it can be shifted under the driver surface (13), which is constructed as an end side ring face of the shoulder (7).

Description


  Name of the invention

  
Switchable bucket tappets for a valve train of an internal combustion engine

  
description

  
Field of the invention

  
The invention relates to a switchable bucket tappets for a valve train of an internal combustion engine, having a ring-like cam starting bottom housing, from the outer edge of a shirt and from the inner edge of a hollow cylindrical projection protrudes with a bore in which a relatively axially movable to the housing inner part, whose Bottom of a system for a gas exchange valve is immanent, wherein in a bore of the inner part, a coupling agent is applied, which is partially engageable with a cam surface of the housing for a full valve lift and wherein clamped between the housing and the inner part of a lost-motion spring is.

  
Background of the invention

  
Such a tappet is apparent from the considered as generic forming DE 44 92 633 C1. Its coupling mechanism is located immediately below the floor area. The skilled artisan will recognize that the prior art ram is constructed relatively complicated and thus its production proves to be unnecessarily costly. For example, the outer part in the bottom region is not formed substantially symmetrical, since below the ring-shaped bottom guide holes for the coupling piston are applied. Also, the inner part is unnecessarily massive and complicated. Due to the aforementioned massive design, the oscillating valve train masses are disadvantageously increased.

  
In addition, prior art solutions are previously known in which the one or more coupling pistons retract in a coupling case in a frontally adjacent, all-round annular groove of the other component. On the one hand, the annular groove weakens the material and on the other increases the manufacturing effort. Possibly. is also to rake with unnecessarily long oil paths, which can adversely affect the switching times.

  
Object of the invention

  
The object of the invention is therefore to provide a tappet of the aforementioned type, in which the cited disadvantages are eliminated by simple means.

  
Solution of the task

  
According to the invention this object is achieved in that the inner part is substantially shown as a thin-walled, open on both sides pipe section, which is bridged by a transverse web with the bore, wherein as a coupling means only a rotationally secured and in the coupling direction via at least one compression spring and decoupling via hydraulic means lozierbarer Piston is provided, which, starting from its coupling-side end, is provided on the upper side with a section-wise flattening over which it is displaceable in the coupling case under the end face as the annular end of the neck of the housing driving surface. In principle, it is also conceivable and intended to apply the inventive measures in other switchable valve train members such as roller tappets or support elements.

  
Thus, the above-described disadvantages are eliminated. The invention relates to a so-called "single-piston lock", which is relatively simple and has only a low component requirement. In addition, the oscillating valve train masses are lowered by the arrangement of the coupling piston in the inner part and there are also no costly measures required to create a Mitnehmerfläche for the coupling piston, since the already existing end-side annular end of the approach is used.

  
It is particularly preferred if the cup tappet according to the invention is designed as a "deactivating tappet". Thus, only the housing must be provided on the bottom side with appropriate cam start-up measures. The starting bottom of the housing can, but need not, be crowned in the cam migration direction.

  
Due to the substantially thin-walled, tubular design of the inner part, a further contribution to lowering the mass of the tappet is made.

  
Possibly. Solutions are also conceivable and provided, in which the coupling means is waived on the flattening or in which the flattening has a slightly convex contouring o. The like. This may be accompanied by the fact that the driver surface is formed on the neck, for example, crown-like.

  
Another essential component of the invention is that the piston is formed two graded, wherein the first, coupling-side longitudinal portion has a smaller diameter than the second coupling remote longitudinal section. Thus, it is also possible to form an annular end on the coupling means between its longitudinal sections as a pressure surface for hydraulic means, which is conductive in a pressure chamber formed there.

  
According to a further concretization of the invention, the aforementioned pressure chamber should be supplied via a simple feed line which intersects the bore for the coupling means orthogonal or askew and "smooth" emanating from the outer shell of the inner part.

  
According to a further expedient development of the invention, the bore can be formed in the inner part of the coupling means as a stepped through hole. This is manufacturing technology relatively cheap. In this case, a thin-walled ring part is provided as a stop element in the second section of the bore for the single-end system of the compression spring which is intended to displace the coupling means in the coupling direction (pressurelessly locked). This can, seen in the direction of the bore outwards, be supported on a snapped into the bore circlip or the like. At the other end, the compression spring is seated in a recess of a coupling remote forehead of the coupling agent.

  
For better guidance of the abovementioned compression spring, the stop element, starting from its inner edge, has a ring collar extending in the piston direction, around which the compression spring is placed one end. Advantageously, the aforementioned assembly is designed so that the compression spring does not go to block in its coupling remote stop position, which is determined by the stop element.

  
A coupling-side stop position is given by conditioning the annular end between the longitudinal sections of the coupling means to a demgemässen ring stage of the bore.

  
Alternatively, it is proposed to represent the bore for the coupling agent as a simple and unestimated blind bore. To form the first portion of the bore of smaller diameter, it is proposed here, for example, in this press a separate ring member, through which the coupling means extends with its first longitudinal portion of smaller diameter and on which ring part inside the coupling means in the coupling case finds an investment. In Entkoppelrichtung the movement of the coupling agent is limited by conditioning the coupling remote forehead at a bottom of the blind hole.

  
As a simple rotation for the piston as a coupling means, a ring member is proposed which extends in an annular groove in the outer shell of the inner part, which annular groove is applied to a height portion of the flattening of the coupling means. In the thus open bore area, the ring member rests on the flattening and thereby prevents in a simple manner a rotation of the coupling means. Alternatively, it is also conceivable and intended to use other anti-rotation measures for the coupling agent. For example, out of the hole for the coupling means outgoing pins or flats etc. may be provided.

  
Further subclaims relate to simple Zuleitmassnahmen of hydraulic fluid in the pressure chamber in the inner part.

  
Accordingly, runs inside the housing, a thin-walled sheet metal part (optionally, a plastic training is conceivable), which essentially follows its contour. Here, the sheet metal part, starting from a passage for the hydraulic fluid in the shirt, molded channels (riser channel, bottom-side radial bead, axial channel). Since it is preferably dispensed with ring grooves for oil supply, the housing should be provided with respect to its surrounding structure with a simple rotation and also the inner part relative to the housing such that a "directed" supply of hydraulic fluid to the supply line in the inner part is possible.

   Alternatively, corresponding annular grooves for hydraulic fluid may also be applied to the outer jacket of the shirt and to the outer jacket of the inner part or the bore of the attachment of the housing, so that it is possible to dispense with anti-rotation devices.

  
It is particularly preferred to design the bucket tappet as a so-called turn-off ram. Alternatively, the tappet may also be provided in the region of its inner part with a cam starting base (separate or one-piece), so that a stroke reversal is also possible.

  
Short description of the drawing

  
The invention is expediently explained in more detail with reference to the drawing. Show it:

  
1 shows a first longitudinal section through an inventive tappet with trained as a blind bore hole in the inner part;

  
Figure 2 is a section of Figure 1, but rotated by 90 ° and the

  
Figure 3 is a sectional view similar to that shown in Figure 1, but with a continuously formed bore in the inner part. Detailed description of the drawing

  
The figures disclose a switchable tappet 1 for a valve train of an internal combustion engine. This consists of a housing 3 with a ring-like cam starting bottom 2. From an outer edge 4 of the starting bottom 2 is in the direction away from the cam from a shirt 5, over which the tappet 1 in an unillustrated recording of the internal combustion engine is oscillating feasible.

  
From an inner edge 6 of the cam base 2 is a hollow cylindrical projection 7 goes out. This has a bore 8 in which a relative to the housing 3 in the decoupling case relatively axially movable inner part 9 is received with its outer shell 38. On an underside 10 of the inner part 9, a gas exchange valve can be applied.

  
As can also be seen, the inner part 9 has a substantially thin-walled and tube-like design. It has a transverse web 15, in which, as shown in FIG. 1, a bore 11 designed as a blind bore is applied. Furthermore acts between the components 3, 9 a not-to-describe Lost-motion spring 14, which serves a return / holding the housing 3 on the cam contour in the case of shutdown.

  
For coupling according to the invention a one-piston lock is used. For this purpose, only a thickness-graduated piston is provided as the coupling means 12. This consists, as can be seen from the figure 1, of a first longitudinal section 21 of smaller diameter and a second longitudinal section 22 of larger diameter. The coupling means 12 is displaceable in the coupling direction by the force of a compression spring 17 which is supported at one end against a base 37 (FIG. 1) of the bore 11. With its other end, the compression spring 17 acts against a bottom of a recess 35 of the coupling means 12 at the coupling remote end 30th

   Furthermore, it can be seen by the person skilled in the art from FIG. 1 that the first longitudinal section 21 of the coupling means 12 is guided through a bore of a separate annular part 36, for example, being pressed into the bore 11 via its outer jacket. The ring member 36 forms at the coupling remote side thus an "annular stage" 27, which is part of a pressure chamber 25 which is bounded by the annular end 26 of the coupling means 12 Koppelfern limited.

  
Hydraulic means can be conveyed via a supply line 41 a, which is approximately, as shown in FIG. 2, set at 90 ° to the bore 11. When pressurizing the pressure chamber 25 thus takes place a displacement of the coupling means 12 in the Entkoppelrichtung (in the cam base circle), so that the housing 3 performs a Leerhubbewegung relative to the inner part 9 and the gas exchange valve in question remains closed.

  
As shown, the coupling means 12 at its upper side 19, starting from the coupling-side end 18, a flattening 20. About this it engages under a driver surface 13 on the hollow cylindrical projection 7 of the housing 3. This driver surface 13 is formed as an end annular end of the projection 7. Thus, separate measures for forming a coupling surface for the coupling means 12 can be dispensed with.

  
Furthermore, it is apparent from the drawing that the coupling means 12 is provided with a simple rotation. For this purpose, a ring member 40 is applied, which extends at the level of the flattening 20 in an annular groove 39 in the outer casing 38 of the inner part 9.

  
For supplying the hydraulic means: The shirt 5 has, as shown in more detail in Figure 2, a passage 42. This communicates internally with a riser 43, which is formed in the aforementioned sheet metal part 41 on the inner jacket 44 of the shirt 5. On the bottom side, the riser 43 merges into at least one radial bead 45, wherein the radial bead 45 communicates radially inward with a downwardly leading axial duct 46. Due to the anti-rotation device (pin longitudinal groove o. The like.) Between the housing 3 and the inner part 9 of the passage 48 is always the supply line 41 a opposite to the axial end 46 in fluid connection with a passage 48 in the hollow cylindrical projection. Thus, there is a relatively "direct" supply of hydraulic fluid, starting from the passage 42 in the shirt 5 to the supply line 41 a in the inner part 9 without manufacturing technically elaborate annular grooves.

  
Figure 3 discloses an alternative embodiment of the bore 11 in the inner part 9. This is shown here continuously and in turn has a coupling-side, first portion 23 of small diameter and a second portion 24 of larger diameter remote from the coupling. For one-end installation of the compression spring 17 in this case in the second portion 24 of the bore 11, a funnel-like stop member 29 is installed, which is supported in the direction away from the bore over its outer edge region 31 on a locking ring 32 which extends in an annular groove 33 of the second section 24.

  
Furthermore, it can be seen that an annular collar 34 originates from an inner edge of the stop element 29, around which the compression spring 17 is laid in sections with its single-end region for the purpose of guiding.

  
In addition, Figure 3 discloses a rotation lock 49 shown schematically in the shirt 5 for the tappets 1.

  
It should be emphasized that the inner part 9 is simply constructed tube-like and thus makes a contribution towards lightweight construction and reduction of manufacturing costs.

  
For a uniform installation of the aforementioned lost-motion spring 14 to the radial pitch (or the radial bead) 45 of the sheet metal part 41 in the bottom area (cam starting floor 2) a simple ring is provided as a compensation piece. List of reference numbers

  
1) Tappet

  
2) cam starting floor 3) housing

  
4) outside edge

  
5) shirt

  
6) inner edge

  
7) hollow cylindrical approach 8) bore approach

  
9) inner part

  
10) Base

  
11) bore inner part

  
12) coupling means 13) driving surface

  
14) Lost-motion spring

  
15) transverse web

  
16) not awarded

  
17) compression spring 18) forehead

  
19) top

  
20) Flattening

  
21) first longitudinal section

  
22) second longitudinal section 23) first section bore

  
24) second section hole

  
25) pressure chamber

  
26) Ring-end coupling agent

  
27) Ring step bore 28) Outer jacket

  
29) stop element

  
30) remote from the forehead 31) outer edge region

  
32) Circlip / snap ring

  
33) annular groove

  
34) ring collar 35) recess

  
36) annular part

  
37) Base

  
38) outer jacket inner part

  
39) annular groove 40) ring element

  
41) sheet metal part

  
41 a) Supply line

  
42) passage

  
43) Rising channel 44) Inner coat Shirt

  
45) radial bead

  
46) axial

  
47) Outer jacket approach

  
48) passage 49) anti-rotation

  
50) Ring

Claims

claims
1. Switchable tappet (1) for a valve train of an internal combustion engine, having a ring-like cam starting bottom (2) housing (3), from the outer edge (4) a shirt (5) and from the inner edge (6) a hollow cylindrical projection (7 ) with a hole
(8) projects, in which a to the housing (3) relatively axially movable inner part (9) extends, whose underside (10) a system for a gas exchange valve immanent, wherein in a bore (11) of the inner part
(9) a coupling means (12) is applied, the sections for a full valve lift with a driver surface (13) of the housing (3) is engageable and wherein between the housing (3) and the inner part (9) a lost motion Spring (14) is clamped, characterized in that the inner part (9) is shown substantially as a thin-walled, open on both sides pipe section which is bridged by a transverse web (15) with the bore (11), wherein as a coupling means (12) only a non-rotating and in the coupling direction via at least one compression spring (17) and in Entkoppelrichtung via hydraulic means lozierbarer piston is provided, starting from its coupling-side end (18), at the top (19) is provided with a section-wise flattening (20) about the he in the coupling case under the end of the annular end of the approach (7)
 the housing (3) formed driving surface (13) is displaceable.
2. tappet according to claim 1, characterized in that the
Piston as a coupling means (12) from a first, coupling-side longitudinal section (21) of low diameter and a second, remote from the coupling
Longitudinal section (22) on the other hand of larger diameter, which longitudinal sections (21, 22) in correspondingly complementary Ab-sections (23, 24) of the bore (11) extend, wherein the hydraulic fluid in a pressure chamber (25) in the bore (11) can be conducted is, the axially between a longitudinal portions (21, 22) of the coupling means (12) connecting annular end (26) and an opposite annular step (27) between the respective sections (23, 24) of the bore (11) and radially by an outer jacket (28) of the first longitudinal section (21) of low diameter and the portion (23) of the bore (11) of larger diameter is formed.
3. tappet according to claim 2, characterized in that over conditioning of the annular end (26) of the coupling means (12) on the annular step (27) of the bore (11) whose coupling position is determined.
4. tappet according to claim 2, characterized in that the bore (11) for the coupling means (12) in the transverse web (15) as a through hole with the two stepped portions (23, 24) is executed (Fig. 3).
5. tappet according to claim 4, characterized in that in the second portion (24) of the bore (11) [larger diameter] a stop member (29) as a thin-walled ring member as a final AnIage for the compression spring (17) is attached, which at the other end against a coupling remote forehead (30) of the coupling means (12) acts.
6. tappet according to claim 5, characterized in that on investment of the remote forehead (30) of the coupling means (12) on the
Stop element (29) has a decoupling position of the coupling means (12) is fixed. 7. tappet according to claim 5, characterized in that the annular part as a stop element (29) abuts with its outer peripheral portion (31) remote from a circlip / snap ring (32) in an annular groove (33) of the second portion (24) of the bore (11) with the larger diameter.
8. tappet according to claim 5, characterized in that the ring member is provided as a stop element (29) with an outgoing from its inner edge ring collar (34) which extends in the coupling direction and by the compression spring (17) is enclosed, wherein the remote forehead ( 30) of the coupling means (12) is provided with a recess (35) in which the compression spring (17) sits at the other end.
9. cup tappet according to claim 2, characterized in that the bore (11) in the transverse web (15) is designed as ungestufte blind hole, wherein the formation of the first portion (23) of the bore (11) of smaller diameter, a separate ring member (36) in the bore (11) is fixed, through which the coupling means (12) with its first longitudinal portion (21) of smaller diameter extends (Fig. 1).
10. tappet according to claim 9, characterized in that as a finite abutment for the compression spring (17) for displacement of the coupling means (12) has a bottom (37) of the bore (11) shown as a blind bore, wherein the compression spring (17) the other end in a recess (35) extends in the coupling remote end (30) of the coupling means (12). 11. Cup tappet according to claim 1, characterized in that in the outer casing (38) of the inner part (9), on a height portion of the flattening (20) of the coupling means (12), an annular groove (39) with a ring element (40), which Ring element (40) on the flattening (20) of the coupling means (12) extends to the anti-rotation purpose.
12. cup tappet according to claim 2, characterized in that the pressure chamber (25) by a direct feed line (41 a) through the transverse web (15) is supplied, which approximately orthogonal the bore (11) intersects and "smooth" from the outer shell ( 38) of the inner part (9) goes out.
13. tappet according to claim 12, characterized in that in the interior of the housing (3) a thin-walled sheet metal part (41) which follows substantially the contour thereof, wherein the shirt (5) is provided with a passage (42) for the hydraulic means which communicates with a riser channel (43) in the sheet metal part (41) on the inner jacket (44) of the shirt (5), which riser channel (43) communicates with one or more bottom radial grooves (45) in the sheet metal part (41) from the hydraulic medium into an axial channel (46) in the sheet metal part (41) on the outer casing (47) of the projection (7) is guided, which projection (7) is provided at its bottom portion with a passage (48) to which the axial channel ( 46) opens, which passage (48) radially inwardly directly opposite the feed line (41 a).
14. Cup tappet according to claim 1 or 13, characterized in that the inner part (9) relative to the housing (3) is secured against rotation. 15. Cup tappet according to claim 1 or 13, characterized in that the tappet (1) with one of the shirt (5) projecting against rotation (49) is provided.
16. Cup tappet according to claim 1, characterized in that the tappet (1) is shown as a "Abschaltstössel", the inner part (9) is present without cam contact.
PCT/EP2008/058580 2007-07-20 2008-07-03 Switchable tapper for a valve train of an internal combustion engine WO2009024390A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US95110707P true 2007-07-20 2007-07-20
US60/951,107 2007-07-20

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN2008800245410A CN101755107B (en) 2007-07-20 2008-07-03 Switchable tapper for a valve train of an internal combustion engine
KR20107001130A KR101478860B1 (en) 2007-07-20 2008-07-03 Switchable tapper for a valve train of an internal combustion engine
JP2010517343A JP2010533819A (en) 2007-07-20 2008-07-03 Switchable bucket tappet for internal combustion engine valve drive systems

Publications (1)

Publication Number Publication Date
WO2009024390A1 true WO2009024390A1 (en) 2009-02-26

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ID=39811597

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/058580 WO2009024390A1 (en) 2007-07-20 2008-07-03 Switchable tapper for a valve train of an internal combustion engine

Country Status (5)

Country Link
JP (1) JP2010533819A (en)
KR (1) KR101478860B1 (en)
CN (1) CN101755107B (en)
DE (1) DE102008031311A1 (en)
WO (1) WO2009024390A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011185092A (en) * 2010-03-04 2011-09-22 Honda Motor Co Ltd Engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886561B (en) * 2010-06-30 2012-05-23 芜湖杰锋汽车动力系统有限公司 Mechanical flameout tappet for engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003008771A1 (en) * 2001-07-19 2003-01-30 Ina-Schaeffler Kg Connectable bucket tappet
DE102005030718A1 (en) * 2005-07-01 2007-01-04 Schaeffler Kg Turn-off element for a valve train of an internal combustion engine
DE102007008574A1 (en) * 2007-02-19 2008-08-21 Schaeffler Kg Switchable bucket tappets

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4314619A1 (en) 1993-05-04 1994-11-10 Schaeffler Waelzlager Kg Pestle
EP0668436B1 (en) * 1994-02-18 1998-08-12 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Tappet for a disconnectable valve of an internal combustion engine
DE19642718A1 (en) * 1996-10-16 1998-04-23 Schaeffler Waelzlager Ohg Tappet for a valve train of an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003008771A1 (en) * 2001-07-19 2003-01-30 Ina-Schaeffler Kg Connectable bucket tappet
DE102005030718A1 (en) * 2005-07-01 2007-01-04 Schaeffler Kg Turn-off element for a valve train of an internal combustion engine
DE102007008574A1 (en) * 2007-02-19 2008-08-21 Schaeffler Kg Switchable bucket tappets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011185092A (en) * 2010-03-04 2011-09-22 Honda Motor Co Ltd Engine

Also Published As

Publication number Publication date
KR101478860B1 (en) 2015-01-02
KR20100043186A (en) 2010-04-28
CN101755107A (en) 2010-06-23
DE102008031311A1 (en) 2009-01-22
CN101755107B (en) 2012-06-27
JP2010533819A (en) 2010-10-28

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