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WO2006018069A1 - Poussoir commutable - Google Patents

Poussoir commutable Download PDF

Info

Publication number
WO2006018069A1
WO2006018069A1 PCT/EP2005/007208 EP2005007208W WO2006018069A1 WO 2006018069 A1 WO2006018069 A1 WO 2006018069A1 EP 2005007208 W EP2005007208 W EP 2005007208W WO 2006018069 A1 WO2006018069 A1 WO 2006018069A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
shirt
inner body
segments
coupling means
Prior art date
Application number
PCT/EP2005/007208
Other languages
German (de)
English (en)
Inventor
Michael Haas
Lothar Von Schimonsky
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
Application filed by Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2006018069A1 publication Critical patent/WO2006018069A1/fr

Links

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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • 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 tappet, in particular tappets of a valve train of an internal combustion engine, with a hollow cylindrical Au ⁇ and an inner body telescopically inserted into each other and axially movable relative to each other, each of the body has a bottom and one of the floors of at least one Large and the other of the bottoms of at least one small or Nullhubnocken be acted upon, wherein in one of the body coupling means are applied, which are for a coupling state of the body for activating the large stroke in sections in the other body displaced and wherein the coupling means for a Entkoppelschreib the body to activate the Kleinhubes run alone in the one body.
  • a generic pestle is known from DE 44 92 633 C1. Its inner body is in contact with a small lift cam, whereas its outer body, which concentrically surrounds the inner body, is in contact with two high-lift cams. Piston-like coupling means extend in the inner body and can be shifted in sections for the coupling case in the outer body.
  • the aforementioned ram has several disadvantages inherent.
  • the low-lift cam contacting a bottom of the inner body has only a relatively small emigration surface.
  • the plunger is shown cylindrically in the direction of emigration of the cam. This cylindrical bulge in turn increases the production cost.
  • the object of the invention is therefore to provide a plunger of the aforementioned type, in which the cited disadvantages are eliminated.
  • this object is achieved in that the plunger is formed such that the bottom of the inner body communicates with the upper and lower surfaces of the outer body with the at least one small or zero-lift cam.
  • At least one of the bodies consists of thin-walled steel sheet and is produced in a deep-drawing process.
  • a particularly preferred embodiment of the invention is the subject of An ⁇ claim. 3
  • the bottom of the inner body is in the coupling case preferably flat on an underside of the bottom of the outer body and extends through a diametrically completely continuous recess of the bottom of the outer body.
  • the outer body is seen indirectly ver ⁇ with the coupling means.
  • a ring member which is attached to a remote from the bottom of the outer body edge of his Hem ⁇ .
  • segments are assigned to the ring element in concretization of the invention and extend in the decoupling case radially inside an inner shell of cylinder-segment-like extensions of the shirt of the inner body.
  • the segments for the coupling case can be pivoted radially outward in such a way that their upper sides are on lower sides of the extensions, so that the stroke of the high-lift cam, which acts on the bottom of the inner body, via its shirt, the extensions, the Segments on the ring member and indirectly thus can be transferred to the gas exchange valve.
  • the plunger with a hydraulic clearance compensator.
  • This can be arranged in a recess or guide of the ring member and act directly on the gas exchange valve.
  • a brake shoe-like segment is provided for coupling or at least one segment which does not engage under an extension of the shirt of the inner body but into a corresponding recess the shirt of the inner body for the Kop ⁇ pelfall is displaced.
  • a simple constructed and arranged Lost-motion spring is the subject of another sub-claim. Accordingly, this can be designed as at least one zy ⁇ cylindrical or conical helical compression spring which extends in the interior of the inner body and at one end against an underside of the Bo ⁇ dens of the inner body and the other end is supported against an upper side of the Ringele ⁇ ment.
  • a simply constructed anti-twist device for the ram is the subject of a subclaim. Accordingly, it can be guided over the longitudinal sides of the segments of the outer body to the recess on side surfaces of the incoming cam. This eliminates separate Vermossiche- ments such as on the shirt of the outer body radially projecting body and the corresponding construction costs in the cylinder head. Possibly. However, it is also possible to realize a guidance via the aforementioned bodies.
  • An anti-rotation device from inner to outer body can be represented, for example, by flats, projections, etc., which communicate with one another, but do not need to be elaborated at this point.
  • FIG. 1 A spatial external view of the invention
  • Figure 2 shows a cross section through the plunger of Figure 1 in Kop ⁇ pelschreib
  • FIG. 3 shows a cross section through the tappet rotated by 90 ° with respect to FIG. 2, but in the decoupling state
  • FIG. 4 is a plan view of the ring element with coupling means. Detailed description of the drawing
  • Figures 1 to 3 disclose a switchable plunger 1. This consists of a hollow cylindrical outer body 2, which is telescopically with a cup-like réellekör ⁇ 3 and axially movable together.
  • a bottom 4 of the outer body 2 has a view in Nockenauswa mecanicscardi diametrically completely continuous recess 7. Thus, for a cam start on both sides of the recess 7 circle segments 8 remained.
  • a bottom 5 of the inner body 3 is formed closed and is in the coupling case on an underside 17 of the bottom 4 of the outer body 2 at.
  • a protruding into the recess 7 of the outer body 2 bottom portion 18 of the inner body 3 serves as a startup for a quasihubnocken.
  • the circle segments 8 of the bottom 4 of the outer body 2 serve here as a start for Klein ⁇ lifting cam.
  • the inner and outer bodies 3, 2 have a comparatively simple geometry, so that these components can be produced inexpensively from sheet metal in a deep-drawing process.
  • a ring element 11 is fastened to a rim 9 of the shirt 10 facing away from the bottom 4 of the outer body 2. Its underside 12 serves indirectly as a system 13 for a gas exchange valve.
  • a hydraulic Spielaustechnische ⁇ direction known per se, be arranged, which acts directly on the gas exchange valve.
  • the inner body 3 has subsequently explained engagement surfaces 20 for the ring element
  • FIGS. 2, 3 additionally disclose that the shirt 15 of the inner body 3 extends only over a partial area of a height of the shirt 10 of the outer body 2. From a lower edge 20a of the aforementioned shirt 15 are two diametrically opposite, cylinder-segment-like extensions 21 go out. On the undersides 22, the aforementioned engagement surfaces 20 for the brake shoe-like segments are arranged as Koppelmittei 6.
  • the ring element 11, in the peripheral portion of each extension 21 of the inner body 3 has a correspondingly large recess 23, so that in the decoupling case, as in FIG can be seen, the Certainlykör ⁇ per 3 can dive out of the ring member 11 in the valve direction.
  • the brake shoe-like segments are attached as a coupling means 6 at one end 27 rotatably mounted on the ring member 11. At the other end 28, these, in the direction of rotation to the outside, each contacted by a hydraulically actuated piston 29.
  • a spring means 30 is vor ⁇ seen. This is shown here as a bow spring which forces the segments radially inward.
  • upper sides 26 of the aforementioned segments or the engaging surfaces 20 of the extensions 21 of the shirt 15 of the inner body 3 can be provided with suitable wear protection measures such as applied layers, heat treatments or the like.
  • a lost-motion spring 31 is provided in the inner body 3. This is designed here as a helical compression spring and acts at one end against the bottom 16 of the inner body 3. At the other end it is supported on the ring member 11 which is radially outwardly firmly connected to the shirt 10 of the outer body 2 in the region of the lower edge 9.
  • Figure 2 shows the coupling state of the plunger 1.
  • this follows the stroke of the quasihubnockens, which clocked the bottom 5 of the inner body 3 kon ⁇ .
  • the spring means 30 thus forces the brake shoe-like segments as coupling means 6 inwards.
  • the undersides 22 of the extensions 21 of the inner body 3 come out of contact of upper sides 26 of the coupling means 6. During subsequent cam lift, these extensions 21 dive through the recesses 23 of the ring element 11.
  • the plunger 1 thus merely follows the stroke of the outer body 2 in the region of its bottom 4 (circular segments 8) contacting Kleinhubnocken. List of reference numbers

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)

Abstract

L'invention concerne un poussoir commutable (1) d'une commande de soupapes d'un moteur à combustion interne. Ce poussoir est constitué de tôle d'acier et fabriqué selon un procédé d'emboutissage profond. Ledit poussoir (1) est conçu de sorte que son corps intérieur (3) et son corps extérieur (2) peuvent être respectivement soumis à l'action d'une came à grande course et d'une came à petite course. Un poussoir de ce type peut être fabriqué de manière économique. De plus, en cas de désaccouplement, des courses partielles plus grandes que celles permises jusqu'à présent par l'état de la technique peuvent être réalisées.
PCT/EP2005/007208 2004-08-17 2005-07-05 Poussoir commutable WO2006018069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410039705 DE102004039705A1 (de) 2004-08-17 2004-08-17 Schaltbarer Stößel
DE102004039705.8 2004-08-17

Publications (1)

Publication Number Publication Date
WO2006018069A1 true WO2006018069A1 (fr) 2006-02-23

Family

ID=35149395

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/007208 WO2006018069A1 (fr) 2004-08-17 2005-07-05 Poussoir commutable

Country Status (4)

Country Link
KR (1) KR20070051911A (fr)
CN (1) CN101027462A (fr)
DE (1) DE102004039705A1 (fr)
WO (1) WO2006018069A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10119607B2 (en) 2016-04-15 2018-11-06 Koyo Bearings North America Llc Follower mechanism
US11143059B2 (en) 2019-10-03 2021-10-12 Koyo Bearings North America Llc Tappet assembly with unground outer cup
US11149593B2 (en) 2019-10-03 2021-10-19 Koyo Bearings North America Llc Tappet assembly with formed anti-rotation alignment device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100783948B1 (ko) * 2006-12-14 2007-12-10 현대자동차주식회사 스위치블 태핏 구동용 오일 공급경로
DE102007040021A1 (de) 2007-08-24 2009-02-26 Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit einem schaltbaren Nockenfolger
KR100980866B1 (ko) * 2007-12-14 2010-09-10 현대자동차주식회사 가변 밸브 리프트 장치
DE102008062178A1 (de) * 2008-12-13 2010-06-17 Schaeffler Kg Schaltbarer Tassenstößel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213147A1 (de) * 1991-05-03 1992-11-05 Volkswagen Ag Variabler ventiltrieb fuer ein hubventil mit zwei durch unterschiedliche nocken betaetigbaren stoesseln
DE19913290A1 (de) * 1999-03-24 2000-09-28 Schaeffler Waelzlager Ohg Schaltbarer Nockenfolger
DE4492633C1 (de) * 1993-05-04 2001-05-31 Schaeffler Waelzlager Ohg Stößel
US6293239B1 (en) * 1997-03-26 2001-09-25 Daimlerchrysler Ag Valve gear for gas exchange valves of internal combustion engines

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DE1134402B (de) * 1959-02-07 1962-08-09 Cie De Pont A Mousson Sa Verfahren zur Brikettierung eisenhaltiger, pulverfoermiger Stoffe
DE3347680A1 (de) * 1983-12-31 1984-08-30 Ernst 8450 Amberg Haubner Ventilsteuerung fuer brennkraftmaschinen mit zwei unterschiedlichen ventilzeiten
DE3445823A1 (de) * 1984-12-15 1986-06-26 Bayerische Motoren Werke AG, 8000 München Ventilsteuerung, insbesondere fuer brennkraftmaschinen
JPH03213607A (ja) * 1990-01-17 1991-09-19 Fuji Heavy Ind Ltd 可変バルブタイミング式動弁装置
JPH0494405A (ja) * 1990-08-08 1992-03-26 Ntn Corp 可変バルブタイミング装置
JPH0552105A (ja) * 1991-08-23 1993-03-02 Atsugi Unisia Corp 内燃機関の可変バルブタイミングリフト装置
JP3139252B2 (ja) * 1993-07-07 2001-02-26 トヨタ自動車株式会社 可変動弁装置
JPH0749012A (ja) * 1993-08-06 1995-02-21 Aisin Seiki Co Ltd エンジンの動弁装置
JP3310490B2 (ja) * 1994-10-27 2002-08-05 株式会社ユニシアジェックス 内燃機関の動弁装置
DE4440468A1 (de) * 1994-11-15 1996-05-23 Bernd Schneider Verfahren und Schaltungsanordnung zum äußeren Anschluß eines Daten-/Adreßbusses
JPH08284629A (ja) * 1995-04-12 1996-10-29 Unisia Jecs Corp 内燃機関の動弁装置
JP3310513B2 (ja) * 1995-12-15 2002-08-05 株式会社ユニシアジェックス 内燃機関の動弁装置
JPH09177525A (ja) * 1995-12-22 1997-07-08 Unisia Jecs Corp 内燃機関の動弁装置
JPH10141030A (ja) * 1996-11-08 1998-05-26 Kazuo Inoue 可変動弁装置
JPH10169422A (ja) * 1996-12-11 1998-06-23 Toyota Motor Corp 可変動弁装置
JPH11132020A (ja) * 1997-10-30 1999-05-18 Toyota Motor Corp 内燃機関の可変動弁装置
JP3785634B2 (ja) * 2000-08-11 2006-06-14 マツダ株式会社 エンジンの動弁装置
JP3832300B2 (ja) * 2001-09-28 2006-10-11 マツダ株式会社 エンジンの動弁装置
JP3843926B2 (ja) * 2002-09-30 2006-11-08 マツダ株式会社 エンジンの動弁装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213147A1 (de) * 1991-05-03 1992-11-05 Volkswagen Ag Variabler ventiltrieb fuer ein hubventil mit zwei durch unterschiedliche nocken betaetigbaren stoesseln
DE4492633C1 (de) * 1993-05-04 2001-05-31 Schaeffler Waelzlager Ohg Stößel
US6293239B1 (en) * 1997-03-26 2001-09-25 Daimlerchrysler Ag Valve gear for gas exchange valves of internal combustion engines
DE19913290A1 (de) * 1999-03-24 2000-09-28 Schaeffler Waelzlager Ohg Schaltbarer Nockenfolger

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10119607B2 (en) 2016-04-15 2018-11-06 Koyo Bearings North America Llc Follower mechanism
US10385957B2 (en) 2016-04-15 2019-08-20 Koyo Bearings North America Llc Follower mechanism
US11143059B2 (en) 2019-10-03 2021-10-12 Koyo Bearings North America Llc Tappet assembly with unground outer cup
US11149593B2 (en) 2019-10-03 2021-10-19 Koyo Bearings North America Llc Tappet assembly with formed anti-rotation alignment device

Also Published As

Publication number Publication date
KR20070051911A (ko) 2007-05-18
DE102004039705A1 (de) 2006-03-23
CN101027462A (zh) 2007-08-29

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