WO2004076822A1 - Dispositif de montage antitorsion conçu pour les poussoirs a galet du mecanisme de distribution d'un moteur a combustion interne - Google Patents

Dispositif de montage antitorsion conçu pour les poussoirs a galet du mecanisme de distribution d'un moteur a combustion interne Download PDF

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Publication number
WO2004076822A1
WO2004076822A1 PCT/EP2004/000298 EP2004000298W WO2004076822A1 WO 2004076822 A1 WO2004076822 A1 WO 2004076822A1 EP 2004000298 W EP2004000298 W EP 2004000298W WO 2004076822 A1 WO2004076822 A1 WO 2004076822A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
tappets
roller tappets
tappet
assembly
Prior art date
Application number
PCT/EP2004/000298
Other languages
German (de)
English (en)
Inventor
Oliver Schnell
Christof Faria
Peter Sailer
Matthew Evans
Original Assignee
Ina-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 Ina-Schaeffler Kg filed Critical Ina-Schaeffler Kg
Priority to US10/547,056 priority Critical patent/US7086360B1/en
Publication of WO2004076822A1 publication Critical patent/WO2004076822A1/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
    • F01L1/146—Push-rods
    • 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
    • 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
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L13/0031—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 by modification of tappet or pushrod length
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • 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
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the invention relates to an assembly and anti-rotation device (assembly aid) for roller tappets of a valve train of an internal combustion engine with at least two roller tappets, each consisting of an essentially cylindrical tappet body and a roller mounted at one end, which rests on the circumference of a cam of a camshaft and through this is moved axially, the tappet body is provided at its upper end facing away from the roller on the outer casing with a double surface made by two preferably parallel flats, the mounting and anti-rotation device being attachable to the engine block and for receiving the one facing away from the roller Side of the outer shell of the roller tappet has successively arranged receiving spaces, the inner profile of which is adapted to the outer profile of the double flat.
  • roller tappets of the valve train must be guided so as to prevent rotation, in order to prevent the roller tappet roller from moving relative to the direction of movement of the cam of the camshaft, and thus to increase friction, combined with increased wear and fuel consumption.
  • heat-resistant plastic bridges are used, among other things, in which the roller tappets are mounted against rotation via matched inner profiles of the receiving spaces of the bridges and outer profiles of the roller tappets.
  • roller tappet consists of heat-resistant ceramics or glass fiber reinforced materials and is designed so that they are attached to the engine block and can accommodate a roller tappet in several receiving rooms one behind the other.
  • the roller tappets are inserted into and held by the above-mentioned receiving spaces, which makes assembly easier.
  • the mounting areas of the assembly aid are provided with the matching inner profile.
  • the height of the anti-rotation surfaces on the roller tappet and assembly aid are designed so that the roller tappet can carry out the full cam stroke without leaving the assembly aid completely, which secures the roller tappet against rotation during operation by means of surface guidance.
  • Switchable roller tappets consist of a first section, which actuates a gas exchange valve via a tappet rod and a rocker arm, and a second section, which is provided at the lower end with a roller which interacts with a cam of a camshaft. Both sections are arranged concentrically one inside the other and can be connected to one another by means of a coupling device.
  • the coupling device In the switched-off state, the coupling device is released and the section actuated by the cam can move freely relative to the other section, as a result of which the actuation of the gas exchange valve is interrupted.
  • the inner and outer sections In the connected state, the inner and outer sections are firmly connected to one another via the coupling device, and the movement of the cam causes the gas exchange valve to be actuated.
  • the gas exchange valves of the non-switchable cylinders become non-switchable Roller tappets driven.
  • a disadvantage of the above-mentioned invention is that erroneously switchable roller tappets cannot be assigned to switchable cylinders and non-switchable roller tappets to switchable cylinders during assembly.
  • the invention is therefore based on the object to avoid these disadvantages and thus to provide an assembly and anti-rotation device in which the non-switchable roller tappets can only be assigned to the non-switchable cylinders, the switchable roller tappets only to the cylinders to be switched and in which the switchable roller tappets can only be mounted in the orientation in which the opening in the outer jacket of the roller tappet points in the direction of the oil supply.
  • first and second roller tappets are mounted which differ by the wrench size of the double flat, the double flat of the first or second roller tappets being made asymmetrically to their longitudinal axis and consequently having a long and a short anti-rotation surface, and that the assembly aid has first and second receiving openings which are designed such that first roller tappets can only be used in first receiving openings and second roller tappets can only be used in second receiving openings.
  • the asymmetrically arranged anti-rotation surfaces of the switchable roller tappets and the corresponding receiving areas of the assembly aid ensure that switchable roller tappets can only be fixed in the orientation in which the opening in the tappet casing is aligned with the oil gallery in the cylinder head. In this way, incorrect assembly can be avoided in a simple and inexpensive manner.
  • fastening device of the assembly aid be attached outside the connecting line of the center points of the roller tappets, so that the assembly aid can only be attached to the crankcase in the correct orientation.
  • a groove is additionally arranged in the long anti-rotation surface of the double flat on the outer section of the switchable roller tappet. Furthermore, a rib is fitted in the corresponding section of the interior of the assembly aid, said rib engaging in a form-fitting manner in the groove, the length of the groove being selected so that the cam stroke can be carried out.
  • the assembly aid is a cast or injection-molded device made of plastic, it is advantageous to use the rib in the assembly aid and the groove Attach the outer jacket of the roller tappet, since this can be produced inexpensively, for example by a simple stamping process.
  • the groove can be introduced into the short anti-rotation surface of the double flat on the outer section of the switchable roller tappet and a rib can be attached to the corresponding location in the interior of the receiving space of the assembly aid, which engages in the groove, the length of the groove being chosen such that the cam stroke can be executed.
  • FIG. 1 shows the side view of an assembly aid with switchable and non-switchable roller tappets with a partial section in the area of a fastening device
  • Figure 2 is a plan view of the assembly aid of FIG. 1;
  • Figure 3 shows a longitudinal section through a switchable roller tappet;
  • FIG. 4 shows a roller tappet rotated through 90 ° relative to FIG. 2 in a partial longitudinal section
  • FIG. 5 shows in section a partial view of an internal combustion engine with a switchable roller tappet
  • Figure 6a is a plan view of a non-switchable roller tappet
  • Figure 6b is a plan view of a switchable roller tappet
  • Figure 7 shows a cross section along line Vla-VIa through the
  • Figure 8 shows a cross section along the line Vlb-Vlb through the assembly aid with inserted, switchable roller tappet
  • FIG. 1 shows an assembly aid 1 according to the invention with a fastening device 2 for fixing to a crankcase, not shown.
  • the mounting aid 1 accommodates two non-switchable roller tappets 3 and two switchable roller tappets 4.
  • the roller tappets 3, 4 each have a roller 5 and are mounted in the assembly aid 1 with the end section facing away from the roller 5.
  • the roller tappets 4, which can be switched, have an opening 6 through which a pressure medium can be supplied.
  • the roller tappets 3, 4 are inserted into receiving openings 7, 8 (FIG. 2).
  • the assembly aid 1 is asymmetrical in the area of the fastening device 2. risch with respect to the center of the mounting aid (1) to prevent the mounting aid 1 is attached to the crankcase in the wrong orientation.
  • a switchable roller tappet 4 is shown in Figures 3, 4. It essentially consists of an outer cylindrical section 9, which receives a piston part 11 within its cylindrical receiving space 10. In addition, a coupling means 12 is mounted in a bore 13 in the lower end of the piston part 11. Also shown are a valve clearance compensation element 14 in the piston part 11 and a spring assembly 15 in the outer section 9, which the piston part
  • the two components 9, 11 are axially movable relative to one another in the decoupled state.
  • the coupling means 12 is actuated into the coupling position by a spring means 16, here designed as a helical spring.
  • the spring means 16 is supported on an anti-rotation pin 17 on the side facing away from the coupling means 12.
  • the anti-rotation pin 17 is guided in an elongated hole 18 of the cylindrical portion 9.
  • the connection between the outer section 9 and the piston part 11 can be made by applying a counter pressure by means of hydraulic fluid to an end face 19 of the coupling means
  • FIG. 5 shows a longitudinal section through an internal combustion engine, in which a switchable roller tappet 4 is moved axially by a cam 20 of a camshaft 21.
  • the longitudinal movement of the roller tappet 4 is transmitted via a push rod 22 and a rocker arm 23 to a gas exchange valve 24.
  • the counterpressure on the end face 19 of the coupling means 12 can be built up via an oil gallery 25, which is connected to the end face 19 via the opening 6 on the outer jacket of the switchable roller tappet 4.
  • the function of the switchable roller tappet 4 can only develop if it is inserted into the receiving space 8 provided for it and in the correct orientation in order to deliver that the opening 6 of the outer cylindrical portion 9 is aligned with the oil gallery 25. This is achieved by profiling the outer cylindrical section 9 of the switchable roller tappet 4 or a tappet body 26 of the non-switchable roller tappet 3 at the end of the roller tappet facing away from the roller 5.
  • FIG. 6 a shows a top view of the end of a non-switchable roller tappet 3 facing away from the roller 5.
  • the essentially cylindrical tappet body is provided with two parallel, opposing anti-rotation surfaces 27, which form a double 28.
  • the double 28 is arranged symmetrically to the tappet axis.
  • the switchable roller tappet 4 is also provided with two anti-rotation surfaces 29, 30 which form a double surface 31.
  • the wrench size of the double flat 28 differs significantly from the wrench size of the double flat 31.
  • the anti-rotation surfaces 29, 30 are arranged asymmetrically with respect to the longitudinal axis of the roller tappet body and thus form a short 29 and a long anti-rotation surface 30. In the short anti-rotation surface 29 there is a groove 32 appropriate.
  • the inner contours of the receiving spaces 7, 8 of the non-switchable or switchable roller tappets 3, 4 consist of circular 33 and chord-like sections 34 and are adapted to the outer contours of the respective roller tappets.
  • a rib 35 is attached in the inner contours of the receiving spaces 8 of the switchable roller tappets 4, which engages in the groove 30 of the short anti-rotation surface 29 of the switchable roller tappets 4.
  • roller tappets are inserted with their end facing away from the roller 5 into the receiving spaces 7, 8 and held therein.
  • the anti-rotation surfaces 27, 29, 30 of the roller tappets 3, 4 in conjunction with the tendon-like sections 34 of the receiving spaces 7, 8 of the assembly aid 1 cause the roller tappets 3, 4 to be secured against rotation during operation of the internal combustion engine become.
  • switchable roller tappets 4 are not used in the receiving space 7 of the non-switchable roller tappets 3 and vice versa.
  • FIGS. 7 As can easily be seen by a person skilled in the art from FIGS.
  • the eccentrically arranged anti-rotation surfaces 29, 30 of the switchable roller plunger 4 and the groove 32 in the shorter anti-rotation surface 29 in cooperation with the rib 33 of the receiving space 8 of the assembly aid 1 ensure that the switchable roller plunger 4 can only be used in the correct orientation.
  • Switchable roller plungers 34 Tendons running from Ab

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 dispositif de montage antitorsion (aide au montage) (1) conçu pour les poussoirs à galet du mécanisme de distribution d'un moteur à combustion interne dans lequel des soupapes de changement des gaz sont commandées par l'intermédiaire de poussoirs à galet. Ces poussoirs à galet, qui sont essentiellement constitués d'un corps de poussoir cylindrique, sont maintenus dans des espaces de réception (7, 8) de l'aide au montage (1), qui est constituée d'un matériau plastique. Lors du fonctionnement du moteur à combustion interne, les poussoirs à galet sont guidés dans l'aide au montage de façon à être bloqués en rotation, au moyen de surfaces antitorsion opposées parallèles qui sont disposées symétriquement par rapport à l'axe longitudinal du poussoir à galet et montées sur l'extrémité du poussoir à galet qui est opposée à un galet. A cet effet, le profil interne des espaces de réception (7, 8) est adapté au profil externe des poussoirs à galet. Un des objectifs de cette invention est d'empêcher que, lors du montage, les poussoirs à galet accouplables ne soient confondus avec les poussoirs à galets non accouplables. A cet effet, les distances entre les surfaces antitorsion se trouvant sur les différents poussoirs à galet et, par conséquent, les contours internes des espaces de réception (7, 8) correspondants sont sélectionnés de façon à présenter des différences significatives. Un autre objectif de cette invention est de pouvoir orienter correctement les poussoirs à galet accouplables, par exemple par rapport à une rampe à huile. A cet effet, les surfaces antitorsion des poussoirs à galet accouplables ainsi que les espaces de réception correspondants (8) de l'aide au montage (1) sont montés de manière asymétrique par rapport à l'axe longitudinal du corps de poussoir et sont respectivement pourvus d'une rainure ou d'une nervure (35).
PCT/EP2004/000298 2003-02-27 2004-01-16 Dispositif de montage antitorsion conçu pour les poussoirs a galet du mecanisme de distribution d'un moteur a combustion interne WO2004076822A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/547,056 US7086360B1 (en) 2003-02-27 2004-01-16 Assembly and torsional stop device for roller tappets of a drive in an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45103703P 2003-02-27 2003-02-27
US60/451,037 2003-02-27

Publications (1)

Publication Number Publication Date
WO2004076822A1 true WO2004076822A1 (fr) 2004-09-10

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ID=32927694

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/000298 WO2004076822A1 (fr) 2003-02-27 2004-01-16 Dispositif de montage antitorsion conçu pour les poussoirs a galet du mecanisme de distribution d'un moteur a combustion interne

Country Status (3)

Country Link
CN (1) CN1756895A (fr)
DE (1) DE10360293A1 (fr)
WO (1) WO2004076822A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061680A1 (de) * 2004-12-22 2006-08-03 Schaeffler Kg Ventiltrieb für eine Brennkraftmaschine
DE102014220386B3 (de) * 2014-10-08 2016-02-04 Schaeffler Technologies AG & Co. KG Mechanischer Rollenstößel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088455A (en) * 1991-08-12 1992-02-18 Mid-American Products, Inc. Roller valve lifter anti-rotation guide
US5678514A (en) * 1996-04-02 1997-10-21 Ford Global Technologies, Inc. Valve lifter retainer for an internal combustion engine
US6257189B1 (en) * 2000-06-21 2001-07-10 Tmj Properties, L.L.C. Valve guide
US6405699B1 (en) * 2001-08-09 2002-06-18 Eaton Corporation Roller follower guide orientation and anti-rotation feature
DE10225721A1 (de) * 2001-06-25 2003-01-09 Ina Schaeffler Kg Brennkraftmaschine mit einer Verdehsicherungs-Brücke für Ventilstößel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5546899A (en) * 1995-02-10 1996-08-20 Air Flow Research Heads, Inc. Valve train load transfer device for use with hydraulic roller lifters
DE10110914A1 (de) * 2001-03-07 2002-09-12 Ina Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit einem schaltbaren rotationssymmetrischen Bauteil
DE10142329A1 (de) * 2001-08-30 2003-03-20 Ina Schaeffler Kg Ventiltrieb für eine Brennkraftmaschine
DE10212522A1 (de) * 2002-03-21 2003-10-02 Ina Schaeffler Kg Ventiltrieb für eine Brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088455A (en) * 1991-08-12 1992-02-18 Mid-American Products, Inc. Roller valve lifter anti-rotation guide
US5678514A (en) * 1996-04-02 1997-10-21 Ford Global Technologies, Inc. Valve lifter retainer for an internal combustion engine
US6257189B1 (en) * 2000-06-21 2001-07-10 Tmj Properties, L.L.C. Valve guide
DE10225721A1 (de) * 2001-06-25 2003-01-09 Ina Schaeffler Kg Brennkraftmaschine mit einer Verdehsicherungs-Brücke für Ventilstößel
US6405699B1 (en) * 2001-08-09 2002-06-18 Eaton Corporation Roller follower guide orientation and anti-rotation feature

Also Published As

Publication number Publication date
CN1756895A (zh) 2006-04-05
DE10360293A1 (de) 2004-10-21

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