WO2008068251A1 - Levier entraîneur commutable d'un mécanisme de commande de soupapes d'un moteur à combustion interne - Google Patents

Levier entraîneur commutable d'un mécanisme de commande de soupapes d'un moteur à combustion interne Download PDF

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Publication number
WO2008068251A1
WO2008068251A1 PCT/EP2007/063265 EP2007063265W WO2008068251A1 WO 2008068251 A1 WO2008068251 A1 WO 2008068251A1 EP 2007063265 W EP2007063265 W EP 2007063265W WO 2008068251 A1 WO2008068251 A1 WO 2008068251A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling
lever
bore
coupling piston
contact surface
Prior art date
Application number
PCT/EP2007/063265
Other languages
German (de)
English (en)
Inventor
Stefan Gemein
Joachim Krause
Jens Lang
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 WO2008068251A1 publication Critical patent/WO2008068251A1/fr

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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
    • 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
    • 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
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison

Definitions

  • the invention relates to a switchable rocker arm of a valve train of an internal combustion engine, with an outer and between the arms or on the arm extending inner lever, both levers are relatively pivotable relative to each other and the inner lever at one end on its underside a contact surface for a head of a support element and - At the end of a system for at least one gas exchange valve is immanent, wherein in the region of the contact surface a bore extends with at least one coupling piston which is engageable with a driving surface of the outer lever in sections for a coupling case of the lever and wherein at least one outer side of at least the outer lever Contact surface is applied for a lifting cam.
  • Such drag levers are known in the art.
  • a stop bushing In the respective bore for the coupling piston end stop a stop bushing is pressed. Through the latter runs a coupling piston extending pipe section, which passes outside in a plate area.
  • the coupling piston learns about the plate area at the stop bushing a travel limit in the coupling direction.
  • the bush also serves as a single end support for the screw compression spring.
  • an inner end region of the bush can serve as a travel limit for the coupling piston in its decoupling direction. It is disadvantageous in the aforementioned embodiment that the manufacturing and assembly costs for the socket is relatively high. So this has to be introduced exactly defined in terms of their insertion force and their way into the bore for the coupling piston.
  • the object of the invention is therefore to provide a drag lever of the aforementioned type, in which the cited disadvantages are eliminated by simple means.
  • this object is achieved in that the bore is shown from exactly two stepped sections in which the coupling piston with two stepped, complementary jacket areas extends, with a travel limit of the coupling piston in one direction via a system whose ring area between its lateral areas on an annular collar between the sections of the hole is shown.
  • switchable drag lever which is constructed significantly simplified in the region of its coupling mechanism and can be easily assembled. It is only necessary to drill the bore for the coupling piston from particularly preferably represent two stepped sections (possibly also more than two stages are conceivable), in which then runs the also two-stage coupling piston. Due to the abovementioned abutment of the annular region of the coupling piston on the annular collar of the bore, its end position in the coupling or decoupling direction is reliably determined.
  • the bore can have an annular collar in both directions, by means of which the movement of the coupling piston can be fixed in both directions.
  • the ring area and the ring collar can be made cone-shaped.
  • the coupling piston should be integrally formed. Possibly. is also the multi-part training conceivable and provided.
  • the entire coupling mechanism can build axially and possibly also radially smaller.
  • the driver surface of the swiveling in the decoupling outer lever may be formed, for example, as a shell-like bottom or as a bore, below or into which the coupling piston moves in the coupling case.
  • the coupling piston is formed with its bore as a so-called “longitudinal locking device.” It is also particularly preferred to let the coupling piston move obliquely under the driving surface of the transverse region of the outer lever ,
  • the drag lever according to the invention can be designed either as a valve lift switch or possibly as Ventilhubabschalter.
  • the coupling piston is acted upon in the coupling direction by means of compression spring force.
  • the coupling piston can also be displaced in the Entkoppeliques about compression spring force.
  • a provision of the coupling piston in the respective other direction should be effected via hydraulic means, which can be derived from the support element via the contact surface. Due to the annulus on the ring collar can be dispensed with separate measures to create a pressure chamber.
  • the at least one compression spring in a blind hole in the region of the inner end of the coupling piston run.
  • FIG. 2 shows an alternative design to FIG. 1.
  • FIG. 1 Shown in FIG. 1 is a partial longitudinal section through a switchable towing lever 1 in the region of its coupling mechanism.
  • the other end area with a system for the gas exchange valve is not shown in the drawing for the sake of simplicity.
  • the drag lever 1 consists of an outer lever 3, between the arms 2, an inner lever 4 extends.
  • the inner lever 4 also on the underside 5, a system for at least one gas exchange valve.
  • This bore 7 consists of two sections 13, 14, of which according to Fig. 1, the section 13 (inside) has a smaller diameter than the section 14 (outside) and according to FIG. 2, the section 13 has a larger diameter than the section 14.
  • an annular collar 18 is formed, on which the stepped coupling piston 8 with its annular region 17 finds a stop in one direction (FIGS. 1, 2).
  • the bore 7 extends in an imaginary extension obliquely under a complementary driver surface 9 (Fig. 1) of a bow-shaped transverse region 19 of the outer lever 3 behind the end of the inner lever 4.
  • the oblique course of the bore 7 with coupling piston 8 possibly reduces the overall height of the entire follower lever 1 or the transverse region 19 of the outer lever 3 can be built sufficiently "high".
  • the coupling piston 8 is displaceable in the decoupling direction by way of the force of at least one helical compression spring 20 and in the coupling direction via hydraulic medium which can be led out of the contact surface 6.
  • the latter is part of a guided by the helical compression spring 20, remote coupling extension of the coupling piston 8.
  • the other end, the helical compression spring 20 acts against a coupling-side stop surface of the inner lever 4.
  • the hydraulic fluid is from the contact surface 6 via a direct channel 23rd in an annular space 24 in front of the annular region 17 of the coupling piston 8 can be conducted.
  • the coupling piston 8 in the region of its inner end 21 has a blind hole 28.
  • the helical compression spring 20 is supported at one end. This works at the other end against a separate stop ring 22.
  • the stop ring 22 experiences an axial travel limit to the outside on a Sich ceremoniessele- element 25 as a snap ring which extends in an unspecified annular groove of the bore 7.
  • FIG. 2 shows the coupling position of the coupling piston 8.
  • the coupling piston 8 also learn a stop position in Entkoppelraum. Additional stop bushings, as in the prior art, can thus be dispensed with.
  • Fig. 2 due to the sectional arrangement of the helical compression spring 20 in the blind hole 28 of the coupling piston 8 made a contribution to an axially relatively short-built coupling mechanism.
  • Fig. 1 From Fig. 1 can also be seen that on top 11 of the arms 2 of the outer lever 3, a contact surface 12 is present for each one renal hubnocken (shown is only one arm 2). An upper side of the inner lever 4 is, for example, acted upon by a Niedrighubnocken. On both tops 11 can optionally be applied rollers or sliding surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

La présente invention concerne un levier entraîneur (1) commutable d'un mécanisme de commande de soupapes d'un moteur à combustion interne, avec un levier extérieur et un levier intérieur (3, 4), une surface de contact (6) pour une tête d'un élément d'appui étant immanente au levier intérieur (4) au niveau d'une extrémité, dans la zone de la surface de contact (6) s'étendant un perçage (7) avec au moins un piston de couplage (8) qui peut être mis en prise par endroits avec une surface d'entraînement (9) du levier extérieur (3) en cas de couplage des leviers (3, 4), le perçage (7) étant constitué de précisément deux sections (13, 14) étagées, dans lesquelles le piston de couplage (8) s'étend avec deux zones d'enveloppe (15, 16) complémentaires, étagées, une limitation de course du piston de couplage (8) dans une direction étant constituée par un appui de sa zone annulaire (17) entre ses zones d'enveloppe (15, 16) sur un collet annulaire (18) entre les sections (13, 14) du perçage (7).
PCT/EP2007/063265 2006-12-08 2007-12-04 Levier entraîneur commutable d'un mécanisme de commande de soupapes d'un moteur à combustion interne WO2008068251A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006057895A DE102006057895A1 (de) 2006-12-08 2006-12-08 Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102006057895.3 2006-12-08

Publications (1)

Publication Number Publication Date
WO2008068251A1 true WO2008068251A1 (fr) 2008-06-12

Family

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PCT/EP2007/063265 WO2008068251A1 (fr) 2006-12-08 2007-12-04 Levier entraîneur commutable d'un mécanisme de commande de soupapes d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102006057895A1 (fr)
WO (1) WO2008068251A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8616165B2 (en) 2010-09-24 2013-12-31 Schaeffler Technologies AG & Co. KG Arrangement for coupling two components of an internal combustion engine arranged movable relative to each other
WO2016057601A1 (fr) * 2014-10-10 2016-04-14 Schaeffler Technologies AG & Co. KG Commande de jeu mécanique pour un linguet à rouleau pouvant être commuté

Families Citing this family (22)

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Publication number Priority date Publication date Assignee Title
US9016252B2 (en) 2008-07-22 2015-04-28 Eaton Corporation System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a hydraulic lash adjuster gallery
US9291075B2 (en) 2008-07-22 2016-03-22 Eaton Corporation System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a control gallery
US9708942B2 (en) 2010-03-19 2017-07-18 Eaton Corporation Rocker arm assembly and components therefor
US9228454B2 (en) 2010-03-19 2016-01-05 Eaton Coporation Systems, methods and devices for rocker arm position sensing
US9284859B2 (en) 2010-03-19 2016-03-15 Eaton Corporation Systems, methods, and devices for valve stem position sensing
US10415439B2 (en) 2008-07-22 2019-09-17 Eaton Intelligent Power Limited Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9038586B2 (en) 2010-03-19 2015-05-26 Eaton Corporation Rocker assembly having improved durability
WO2015134466A1 (fr) 2014-03-03 2015-09-11 Eaton Corporation Dispositif d'actionnement de soupape et son procédé de fabrication
US20190309663A9 (en) 2008-07-22 2019-10-10 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US8985074B2 (en) 2010-03-19 2015-03-24 Eaton Corporation Sensing and control of a variable valve actuation system
US9938865B2 (en) 2008-07-22 2018-04-10 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9581058B2 (en) 2010-08-13 2017-02-28 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US11181013B2 (en) 2009-07-22 2021-11-23 Eaton Intelligent Power Limited Cylinder head arrangement for variable valve actuation rocker arm assemblies
US10087790B2 (en) 2009-07-22 2018-10-02 Eaton Corporation Cylinder head arrangement for variable valve actuation rocker arm assemblies
US9194261B2 (en) 2011-03-18 2015-11-24 Eaton Corporation Custom VVA rocker arms for left hand and right hand orientations
US9885258B2 (en) 2010-03-19 2018-02-06 Eaton Corporation Latch interface for a valve actuating device
US9874122B2 (en) 2010-03-19 2018-01-23 Eaton Corporation Rocker assembly having improved durability
US9194260B2 (en) 2010-03-19 2015-11-24 Eaton Corporation Switching rocker arm
WO2011116329A2 (fr) * 2010-03-19 2011-09-22 Eaton Corporation Culbuteur commutatable
USD750670S1 (en) 2013-02-22 2016-03-01 Eaton Corporation Rocker arm
DE102016125216A1 (de) * 2016-12-21 2017-10-26 Schaeffler Technologies AG & Co. KG Schaltbare Ventiltriebskomponente für eine Brennkraftmaschine
JP6736484B2 (ja) 2017-01-10 2020-08-05 株式会社オティックス 内燃機関の可変動弁機構

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JPH06307220A (ja) * 1994-03-28 1994-11-01 Mitsubishi Motors Corp バルブタイミング調整装置
US5544626A (en) * 1995-03-09 1996-08-13 Ford Motor Company Finger follower rocker arm with engine valve deactivator
US5615647A (en) * 1995-03-28 1997-04-01 Eaton Corporation Latch assembly for a valve control system
DE102004017103A1 (de) * 2004-04-07 2005-10-27 Ina-Schaeffler Kg Umschaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004051422A1 (de) * 2004-10-22 2006-05-24 Schaeffler Kg Schaltbarer Schlepphebel
US20070039573A1 (en) * 2005-08-04 2007-02-22 Timken Us Corporation Deactivating roller finger follower

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US5490486A (en) * 1994-10-05 1996-02-13 Ford Motor Company Eight cylinder internal combustion engine with variable displacement
DE10310226A1 (de) * 2003-03-08 2004-09-16 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004007766A1 (de) * 2003-03-20 2004-09-30 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004029555A1 (de) * 2004-06-18 2006-01-05 Ina-Schaeffler Kg Schaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
US6925978B1 (en) * 2004-08-24 2005-08-09 Delphi Technologies, Inc. Two-step roller finger cam follower having angled lock pin
US7305951B2 (en) * 2005-05-09 2007-12-11 Delphi Technologies, Inc. Two-step roller finger follower
JP4535932B2 (ja) * 2005-05-09 2010-09-01 本田技研工業株式会社 エンジンの動弁装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06307220A (ja) * 1994-03-28 1994-11-01 Mitsubishi Motors Corp バルブタイミング調整装置
US5544626A (en) * 1995-03-09 1996-08-13 Ford Motor Company Finger follower rocker arm with engine valve deactivator
US5615647A (en) * 1995-03-28 1997-04-01 Eaton Corporation Latch assembly for a valve control system
DE102004017103A1 (de) * 2004-04-07 2005-10-27 Ina-Schaeffler Kg Umschaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004051422A1 (de) * 2004-10-22 2006-05-24 Schaeffler Kg Schaltbarer Schlepphebel
US20070039573A1 (en) * 2005-08-04 2007-02-22 Timken Us Corporation Deactivating roller finger follower

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8616165B2 (en) 2010-09-24 2013-12-31 Schaeffler Technologies AG & Co. KG Arrangement for coupling two components of an internal combustion engine arranged movable relative to each other
WO2016057601A1 (fr) * 2014-10-10 2016-04-14 Schaeffler Technologies AG & Co. KG Commande de jeu mécanique pour un linguet à rouleau pouvant être commuté
US10196944B2 (en) 2014-10-10 2019-02-05 Schaeffler Technologies AG & Co. KG Mechanical lash control for a switchable roller finger follower

Also Published As

Publication number Publication date
DE102006057895A1 (de) 2008-06-12

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