EP1881166A1 - Mécanisme d'actionnement de soupape commutable pour un moteur à combustion interne - Google Patents

Mécanisme d'actionnement de soupape commutable pour un moteur à combustion interne Download PDF

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Publication number
EP1881166A1
EP1881166A1 EP07111944A EP07111944A EP1881166A1 EP 1881166 A1 EP1881166 A1 EP 1881166A1 EP 07111944 A EP07111944 A EP 07111944A EP 07111944 A EP07111944 A EP 07111944A EP 1881166 A1 EP1881166 A1 EP 1881166A1
Authority
EP
European Patent Office
Prior art keywords
carrier
bearing pin
bore
gear according
annular groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07111944A
Other languages
German (de)
English (en)
Inventor
Richard Best
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
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 EP1881166A1 publication Critical patent/EP1881166A1/fr
Withdrawn legal-status Critical Current

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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
    • F01L13/0005—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
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • 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
    • F01L2001/188—Fulcrums at upper surface
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a switchable valve train for an internal combustion engine, with a series of extending in the longitudinal direction of a cylinder head rocker arms, which on the one hand at one end underside an at least indirect starting surface for at least one cam and the other end a valve seat immanent and the other extend over a recess at its top on a head of a bearing pin, wherein at least a subset of the bearing pin is arranged axially movable in a corresponding bore of an overlying carrier or an insert connected to the carrier, each unit [movable bearing pin / carrier or insert) ]
  • Coupling means for selectively coupling the movable bearing pin are at least indirectly associated with the carrier, so that in the extended state of the movable bearing pin when coupling a large and decoupling a contrast smaller od he 0-valve lift is generated and wherein the respective movable bearing pin is acted upon by a lost-motion spring out of its bore.
  • Such a valve train is considered from the considered generic DE 32 39 941 A1 out.
  • a disadvantage of this see Figure 1) whose extremely elaborately designed coupling mechanism. Laterally on the support a rod-like slide is arranged, which engages over a one-end cone-shaped end surface in the coupling case in an annular groove of a bearing pin.
  • the object of the invention is therefore to provide a switchable valve train of the aforementioned type, in which the cited disadvantages are eliminated.
  • this object is achieved in that in the bore of the carrier or insert an annular groove is arranged, the at least axially upper annular surface orthogonal to the axial line of the bore of the carrier or insert part, wherein the bearing pin has at least one radially or secant extending recess, the Outer jacket cuts and in which in the decoupling case at least one piston is seated as a coupling means, which, starting from its radially outer end, is shown stepped with an overlying flattening and for the coupling case with its flattening sections below the upper annular surface of the bore of the carrier or insert part is displaced.
  • two diametrically in a simple to produce through-bore (possibly also two blind holes in question) in the bearing bolt opposite piston should be provided as a coupling means, so that in the coupling case prevents tilting of the bearing pin and the surface pressure is kept low.
  • this arrangement has the advantage that, should it come to an insufficient "extension" of the piston after triggered coupling command, at least the other piston carries.
  • the pistons can then be moved out in the coupling direction, if the annular groove facing the outer end has a radius curve, which correlates to that of the annular groove. It is thus shown a particularly good bearing surface.
  • Edge wear in the coupling region is avoided by means of corresponding chamfers / roundings "on top" of the piston and on the contact edge of the annular groove.
  • a bore or the like may be provided instead of the annular groove for retracting the piston. In this case, however, then the bearing pin must preferably be secured against rotation.
  • the carrier is designed as a continuous strip for at least one row or a subsection of a row of the rocker arms extending in the longitudinal direction of the cylinder head.
  • the scope of the invention is also related to a valve train with a carrier, which is assigned in one piece to a plurality of rows of extending in the longitudinal direction of the cylinder head rocker arms.
  • the carrier may also be associated with individual rocker arms or groups of rocker arms.
  • valve train with hydraulic clearance compensation.
  • the bearing pin with the play compensation device, so that this is quasi two-part and consists of a pressure piston with the head, which is received in a guide bore of a housing as another part of the bearing pin. This eliminates the need for complex mechanical clearance measures, which are also conceivable.
  • the coupling mechanism can be pre-assembled with bearing pin, clearance compensation, piston and insert placed in a receptacle of the wearer. An outer shell of the insert is held stationary in the receptacle of the carrier.
  • the necessary for the decoupling Lost-motion spring is formed according to another embodiment of the invention as at least one helical or coil compression spring and should act at one end against a front of the bearing pin and the other end against a bottom of the bore of the carrier.
  • the base of the bore of the carrier may be integrally connected to the carrier, but it is also provided to apply in this area a separate plug, a retaining cap, etc.
  • a switchable valve train 1 for an internal combustion engine This consists of an "overhead" support 11 for a series of extending in the longitudinal direction of a cylinder head rocker arms 2.
  • the rocker arm 2 shown here has at its bottom 3 at one end a stop surface 4 (roller bearing roller) for a cam 30 and at the other end a valve seat 5 for at least one gas exchange valve 29th
  • the respective rocker arm 2 has a dome-shaped recess 7.
  • the head 8 is part of a pressure piston 26 of a hydraulic Play compensation device 25.
  • the bearing pin 9, which thus has the play compensation device 25, extends with its outer casing 14 in a downwardly open bore 10 of the carrier 11 / insert part 11a. He is held telescopically movable relative to this bore 10.
  • the bore 10 of the carrier 11 / insert part 11 a has an annular groove 13 a. At least the upper annular surface 15 extends perpendicular to the axial line of the bearing pin. 9
  • Orthogonal to the longitudinal direction of the carrier 11 extends in the bearing pin 9 as a through hole 23 formed recess 16 with two diametrically opposed pistons as coupling means 12.
  • These pistons 12 are in their retracted into the annular groove 13a state (coupling state) shown. They have, starting from their radially outer end 17, on their upper side ever a flattening 18, which is in the coupling case under the upper annular surface 15 of the annular groove 14.
  • the disclosed coupling status can be accomplished, for example, by the force of a spring means acting between inner forehead 20 of the piston 12, such as at least one helical compression spring (cam base circle passage).
  • a return displacement in the decoupling position takes place by means of an external end 20 of the respective piston 12 from the carrier 11 / insert 11 a directed hydraulic fluid.
  • the outer forehead 17 of the piston 12 may also be formed so that they follow the curvature of the annular groove 14.
  • a lost-motion spring 13 is integrated within the bore 10 of the carrier 11 / insert part 11a. This sits at one end on a rocker arm 2 facing away from the end 27 of the bearing pin 9 and the other end acts against a bottom 28 of the bore 10. As a reason 28 here is a cover-like element 24 is applied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP07111944A 2006-07-21 2007-07-06 Mécanisme d'actionnement de soupape commutable pour un moteur à combustion interne Withdrawn EP1881166A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80797306P 2006-07-21 2006-07-21

Publications (1)

Publication Number Publication Date
EP1881166A1 true EP1881166A1 (fr) 2008-01-23

Family

ID=38670478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111944A Withdrawn EP1881166A1 (fr) 2006-07-21 2007-07-06 Mécanisme d'actionnement de soupape commutable pour un moteur à combustion interne

Country Status (3)

Country Link
US (1) US7707979B2 (fr)
EP (1) EP1881166A1 (fr)
DE (1) DE102007031810A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3418513A1 (fr) * 2017-06-21 2018-12-26 MAN Truck & Bus AG Dispositif de transmission de force

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010617A1 (de) 2010-11-25 2012-05-31 Schaeffler Technologies Gmbh & Co. Kg Schaltbares Ventiltriebssystem
DE102010054407A1 (de) 2010-12-14 2012-06-14 Schaeffler Technologies Gmbh & Co. Kg Ventiltriebsystem
DE102011003023A1 (de) * 2011-01-24 2012-07-26 Schaeffler Technologies Gmbh & Co. Kg Kipp- oder Schwinghebel in einem Ventiltrieb einer Brennkraftmaschine
DE102011005851A1 (de) 2011-03-21 2012-09-27 Schaeffler Technologies Gmbh & Co. Kg Ventiltriebsystem für eine Brennkraftmaschine
DE112016001685T5 (de) 2015-05-07 2018-01-25 Eaton Corporation Ventiltriebbaugruppe
CN108350765B (zh) 2015-09-25 2021-07-27 伊顿智能动力有限公司 气阀机构载体组合件
CN113825892B (zh) * 2019-04-26 2023-12-29 伊顿智能动力有限公司 停用摇臂和胶囊

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5888412A (ja) * 1981-11-20 1983-05-26 Honda Motor Co Ltd 頭上弁式動弁機構
DE3239941A1 (de) * 1982-10-28 1984-05-03 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur abschaltung des ventiltriebes einer brennkraftmaschine
JPS59201913A (ja) * 1983-04-28 1984-11-15 Mazda Motor Corp エンジンの弁不作動装置
US5655487A (en) * 1993-12-17 1997-08-12 Ina Walzlager Schaeffler Kg Switchable support element
WO2000020730A1 (fr) * 1998-10-05 2000-04-13 Eaton Automotive S.P.A. Ensemble commande des soupapes
EP1149989A1 (fr) * 2000-03-23 2001-10-31 Eaton Corporation Désactivation d'une soupape avec un ergot de verrouillage hydraulique
US20020195072A1 (en) * 1999-07-01 2002-12-26 Spath Mark J. Valve-deactivating lifter
EP1411214A2 (fr) * 2002-10-15 2004-04-21 INA-Schaeffler KG Butée désactivable pour commande de soupape de moteur à combustion interne
WO2005028816A1 (fr) * 2003-09-05 2005-03-31 Ina-Schaeffler Kg Entrainement de soupapes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6802288B2 (en) * 2002-04-22 2004-10-12 Delphi Technologies, Inc. Deactivation hydraulic valve lifter having a pressurized oil groove
JP4165446B2 (ja) * 2004-05-10 2008-10-15 トヨタ自動車株式会社 多気筒内燃機関の可変動弁機構

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5888412A (ja) * 1981-11-20 1983-05-26 Honda Motor Co Ltd 頭上弁式動弁機構
DE3239941A1 (de) * 1982-10-28 1984-05-03 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur abschaltung des ventiltriebes einer brennkraftmaschine
JPS59201913A (ja) * 1983-04-28 1984-11-15 Mazda Motor Corp エンジンの弁不作動装置
US5655487A (en) * 1993-12-17 1997-08-12 Ina Walzlager Schaeffler Kg Switchable support element
WO2000020730A1 (fr) * 1998-10-05 2000-04-13 Eaton Automotive S.P.A. Ensemble commande des soupapes
US20020195072A1 (en) * 1999-07-01 2002-12-26 Spath Mark J. Valve-deactivating lifter
EP1149989A1 (fr) * 2000-03-23 2001-10-31 Eaton Corporation Désactivation d'une soupape avec un ergot de verrouillage hydraulique
EP1411214A2 (fr) * 2002-10-15 2004-04-21 INA-Schaeffler KG Butée désactivable pour commande de soupape de moteur à combustion interne
WO2005028816A1 (fr) * 2003-09-05 2005-03-31 Ina-Schaeffler Kg Entrainement de soupapes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3418513A1 (fr) * 2017-06-21 2018-12-26 MAN Truck & Bus AG Dispositif de transmission de force
CN109098811A (zh) * 2017-06-21 2018-12-28 曼卡车和巴士股份公司 力传递装置
US10718237B2 (en) 2017-06-21 2020-07-21 Man Truck & Bus Ag Force transmission device
CN109098811B (zh) * 2017-06-21 2022-03-01 曼卡车和巴士股份公司 力传递装置
RU2767581C2 (ru) * 2017-06-21 2022-03-17 Ман Трак Энд Бас Аг Механизм передачи усилия, его применение и транспортное средство, включающее этот механизм

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Publication number Publication date
US7707979B2 (en) 2010-05-04
US20080017154A1 (en) 2008-01-24
DE102007031810A1 (de) 2008-01-24

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