EP0877151A1 - Clavettes de retenue de soupape - Google Patents

Clavettes de retenue de soupape Download PDF

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Publication number
EP0877151A1
EP0877151A1 EP98108204A EP98108204A EP0877151A1 EP 0877151 A1 EP0877151 A1 EP 0877151A1 EP 98108204 A EP98108204 A EP 98108204A EP 98108204 A EP98108204 A EP 98108204A EP 0877151 A1 EP0877151 A1 EP 0877151A1
Authority
EP
European Patent Office
Prior art keywords
valve
pieces
force
cone pieces
extended
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Withdrawn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
EP98108204A
Other languages
German (de)
English (en)
Inventor
Antonius Dipl.-Ing. Wolking
Thomas Plöger
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.)
TRW Deutschland GmbH
Original Assignee
TRW Deutschland GmbH
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 TRW Deutschland GmbH filed Critical TRW Deutschland GmbH
Publication of EP0877151A1 publication Critical patent/EP0877151A1/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Withdrawn legal-status Critical Current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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members
    • 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
    • F01L1/32—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear

Definitions

  • the invention relates to a device for actuating a gas exchange valve Internal combustion engine using non-jamming multi-groove valve cones as connecting elements between the valve stem end and the valve spring plate, in which the actuating forces for the valve movements are initiated immediately.
  • valve turning devices In internal combustion engines, the rotation of the valves about their axis during their Opening or closing movements are aimed at to make an uneven, too local Overheating leading to heating of the valve disc and the build-up of Avoid combustion residues on the valve. For a safe rotation of the valves To ensure during operation, valve turning devices are different Types used. However, valve turning devices require additional installation space. For this reason and also for reasons of cost, valve turning devices are only used for Large engines and partly used in truck engines. They come for car engines practically no longer used.
  • valve cone pieces seated on the shaft ends have the task of connecting the valve spring plate to the valve in such a way that the valve spring always holds the valve in its required position.
  • valve plug pieces there are plug pieces that allow the valve to be rotated and those where the stem is clamped.
  • the two halves of the cone piece lie against each other at their parting lines and are thus supported.
  • the valve stem end which has several grooves due to the better power transmission and is hardened like the cone pieces itself, is able to rotate within these non-clamping multi-groove cone pieces.
  • the rotation of the valves occurs only in the upper speed range, depending on the excitation by the motor; otherwise the friction resulting from the valve spring forces will not be overcome.
  • a rotation of the valves is also achieved when clamping cone pieces are used, but the valve rotation only occurs at the highest engine speeds.
  • valve rotators As mentioned at the beginning, is out of the question for various reasons.
  • the U.S. PS 5,485,815 shows, for example, a poppet valve in which the actuating force is not immediate is introduced into the valve stem end, but in the surrounding end Multi-groove valve cone pieces. It is supported on the outer end faces of the valve cone pieces cap-shaped pressure element while maintaining a free space at the end of the valve stem.
  • a rocker arm loads the external one in time with the control provided Surface of the pressure cap and thereby pushes the valve into the open position.
  • the conical shape of the valve cone elements means that Actuating force on the valve spring plate, so that the valve spring can be compressed.
  • On the surface of the valve plate facing the gas channel are scoop-shaped, aerodynamic guide surfaces arranged at the moment of relief of the Bring the valve plug pieces one valve turn.
  • Making a separate one Power transmission element for the introduction of the actuating force directly into the Valve plug is a significant cost factor.
  • the known design requires a special design of the valve spring plate to guide the cap-shaped pressure element and keep it in its prescribed position.
  • the invention has for its object a device according to the preamble of Claim 1 to be designed so that without the use of special components or by Use of power transmission elements that can be produced at significantly lower cost Valve rotations can be reliably achieved even at low engine speeds.
  • the Invention achieves this object by the feature of the characterizing part of claim 1.
  • the rocker arms, rocker arms or other cam followers can start their movement immediately transfer the outer end faces of the elongated valve cone pieces without that To touch valve stem end.
  • the actuation force and the spring force based on the Grooves in the valve cone pieces evenly even out.
  • the frictional force between Valve stem and cone pieces, which are triggered by the spring actuation or from the Motor excitation must be overcome goes to zero. It has been shown that turn the valves sufficiently even at low engine speeds.
  • the extended ends of the Valve plug pieces for force introduction are provided with force absorption plates.
  • the valve cone pieces on the outer end face an annular, have inner paragraph in which the plates rest.
  • valve stem 1 The upper end of a valve stem 1 is designed with three grooves 2, into which inner beads 3 of valve cone pieces 4 engage. Between the beads 3 and the annular grooves 2 there is a sufficient, but not shown game.
  • the wedge-shaped or conical outer surfaces of the valve cone pieces create a force-transmitting connection between them and the valve spring plate 5.
  • the valve cone pieces 4 are extended beyond the end face or the end 6 of the valve stem.
  • the extended ends 7 are provided with an additional inner bead 8, which is located at a distance above the valve stem end 6, so that a force transmission in the valve stem can only take place via the valve cone pieces.
  • valve cone pieces 10 according to FIG. 2 have a similar design to that of FIG. 1, but with the difference that the beads 11 located at the extended end continue reach radially inwards and thereby a larger end face 12 for the transmission of Offer actuation forces.
  • valve cone pieces 15 enter with their elongated ends Force absorption plate 16, which in circumferential annular paragraphs of the valve cone pieces is laid.
  • the actuation forces act on the force absorption plate Valve plug pieces 15.
  • valve cone pieces shown in FIGS. 4 and 5 differ from those in FIG. 3 only in that they do not show any force-receiving plates placed in the elongated ends, but rather a force-absorbing cap 21, 25 which, according to FIG. 4, is provided with a flat force-receiving surface 22. 5 is designed with a peripheral edge 26 in order to be able to guide the force transmission element, not shown, for example a rocker arm.
  • FIG. 1 An example of use is shown in FIG. The one sitting on the control shaft 30 Cam 31 moves the valve stem 1 over the tappet 32, the power transmission cap 21 and the valve cone pieces 20 against the force of the not shown, on the Valve spring plate 5 acting valve spring downwards.
  • valve cone pieces 4 according to FIG. 1 enables inexpensive production, since the existing production facilities can be used for this. It is possible to grind the contact surfaces between the valve cone pieces on the existing machines. In the manufacture of the valve cone pieces 10, the grinding of the separating surfaces is not possible with the machines used for the valve cone pieces which have been customary to date, but the design offers a larger contact surface for power transmission elements.
  • the designs of the valve cone pieces according to FIGS. 3, 4 and 5 require the use of platelets or small caps, which require somewhat higher costs for the manufacture and assembly, on the other hand, these elements can be used for valve clearance adjustment, since the manufacture of elements of different thicknesses is easy is possible.
  • the solutions according to FIGS. 1 and 2 come primarily into consideration for bucket tappet valve drives.
  • FIGS. 3, 4 and 5 are also suitable for rocker arm drives. They also create a simple option for valve clearance adjustment in mechanical valve drives.
  • the shaft end caps previously used in particular for rocker arm motors and small valve stem diameters to reduce the pressure can be saved by the invention, because the shaft end pressure is now completely eliminated.
EP98108204A 1997-05-09 1998-05-06 Clavettes de retenue de soupape Withdrawn EP0877151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997119685 DE19719685A1 (de) 1997-05-09 1997-05-09 Ventilkegelstücke
DE19719685 1997-05-09

Publications (1)

Publication Number Publication Date
EP0877151A1 true EP0877151A1 (fr) 1998-11-11

Family

ID=7829138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98108204A Withdrawn EP0877151A1 (fr) 1997-05-09 1998-05-06 Clavettes de retenue de soupape

Country Status (2)

Country Link
EP (1) EP0877151A1 (fr)
DE (1) DE19719685A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2917119A1 (fr) * 2007-06-11 2008-12-12 Valeo Sys Controle Moteur Sas Ensemble d'une soupape de moteur a combustion interne sans arbre a cames et d'un actionneur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931101A (fr) * 1945-07-23 1948-02-13 Eaton Mfg Co Perfectionnements apportés à une soupape pour moteur à combustion interne
GB2186057A (en) * 1986-01-31 1987-08-05 Robert Anthony Furnivall Internal combustion engine valve assemblies
WO1987007323A1 (fr) * 1986-05-21 1987-12-03 Bennett Automotive Technology Pty. Ltd. Moteurs destines a etre utilises avec des carburants gazeux
US5485815A (en) 1993-11-25 1996-01-23 Fuji Oozx Inc. Poppet valve device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804062A (en) * 1955-08-18 1957-08-27 Harold B Tinker Free valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931101A (fr) * 1945-07-23 1948-02-13 Eaton Mfg Co Perfectionnements apportés à une soupape pour moteur à combustion interne
GB2186057A (en) * 1986-01-31 1987-08-05 Robert Anthony Furnivall Internal combustion engine valve assemblies
WO1987007323A1 (fr) * 1986-05-21 1987-12-03 Bennett Automotive Technology Pty. Ltd. Moteurs destines a etre utilises avec des carburants gazeux
US5485815A (en) 1993-11-25 1996-01-23 Fuji Oozx Inc. Poppet valve device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2917119A1 (fr) * 2007-06-11 2008-12-12 Valeo Sys Controle Moteur Sas Ensemble d'une soupape de moteur a combustion interne sans arbre a cames et d'un actionneur

Also Published As

Publication number Publication date
DE19719685A1 (de) 1998-11-12

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