EP0392893A1 - Einrichtung zur Führung und Dichtung eines Ventils - Google Patents

Einrichtung zur Führung und Dichtung eines Ventils Download PDF

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Publication number
EP0392893A1
EP0392893A1 EP90400780A EP90400780A EP0392893A1 EP 0392893 A1 EP0392893 A1 EP 0392893A1 EP 90400780 A EP90400780 A EP 90400780A EP 90400780 A EP90400780 A EP 90400780A EP 0392893 A1 EP0392893 A1 EP 0392893A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve guide
sealing ring
sleeve
axially
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Withdrawn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
EP90400780A
Other languages
English (en)
French (fr)
Inventor
Gabriel Laine
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0392893A1 publication Critical patent/EP0392893A1/de
Withdrawn legal-status Critical Current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
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant

Definitions

  • the present invention relates to a device for guiding and sealing a valve, the stem of which is slidably mounted in a tubular valve guide mounted in the cylinder head of an engine, in particular an internal combustion engine.
  • valve guide projects axially from a bearing surface of the cylinder head perpendicular to the axis of the valve and on which one end of a spring bears.
  • valve return valve with interposition of a washer-shaped support cup through which the projecting part of the valve guide passes.
  • the seal between the stem and the valve guide is ensured by means of a sealing ring, one lip of which cooperates with the stem and which is held axially by means of a sleeve fitted on the projecting part of the guide.
  • valve guide made of cast iron or brass
  • a light alloy cylinder head it is necessary to provide an elastic ring or a ring to hold the valve guide axially with respect to the cylinder head, in particular in the case where the tightening thereof in the cylinder head is very low in order to avoid mechanical stresses in these elements.
  • Devices of this type are complex and the various holding and sealing functions are obtained therefrom by multiple and independent components.
  • the assembly of these elements requires a succession of delicate and difficult to automate operations such as in particular the installation of the elastic ring and the fitting of the lip seal with its sleeve.
  • the invention provides a device of the type mentioned above, characterized in that the sleeve and the support cup are made in one piece, the cylindrical part of which forms a sleeve extends axially from the cup. beyond the free end of the projecting portion of the guide by an end portion whose internal surface completely envelops the sealing ring.
  • the sealing ring cooperates with the free end radial face of the projecting part of the valve guide;
  • the cylindrical part forming the sleeve has a base portion which is fitted on the projecting part of the valve guide and which comprises means for axially immobilizing the sleeve relative to the guide;
  • the immobilization means comprise at least one tab cut out in the base portion, which projects radially inwards from the internal surface of this base portion and the end of which is received in a radial groove of the valve guide ;
  • the immobilization means are constituted by several cut tabs distributed angularly around the axis of the sleeve and which project radially in the same plane; - the immobilization tabs extend in the radial plane in which the support cup is located; - The end of each immobilization tab is bent axially in the direction of the free end of the valve guide; -
  • the free end edge of the sleeve part has an internal radial shoulder for
  • the figure shows the rod, or tail, 10 of an internal combustion engine valve which is guided axially in a part of the cylinder head 12 of this engine by a valve guide 14 in the form of a hollow cylindrical sleeve.
  • the guide 14 is fitted into a bore 16 of the cylinder head and is positioned axially so that a part 18 of this guide projects axially outside the cylinder head 12 from a support surface 20 of the latter perpendicular to the axis XX of the valve.
  • an element single 22 made of cut and stamped sheet metal acts as a support cup 24 for a valve return spring 26 and mounting bush 30 for a sealing ring 32.
  • the lower part 24, considering the figure, of the single element 22 is constituted by a radial blank folded 180 ° in the form of a washer which is traversed by the projecting part 18 of the valve guide 14 and which rests on the face 20 of the cylinder head.
  • the lower end 36 of the return spring 26 bears on the part 24 which acts as a support cup for the return spring.
  • the part 24 is extended vertically upwards by a cylindrical part forming a socket 30.
  • the cylindrical part 30 comprises a base portion 38 which is force-fitted onto the projecting part 18 of the guide 14 and a cylindrical end portion 40 which receives the sealing ring 32.
  • the sealing ring 32 is fixed, for example by adhesion or gluing, against the internal surface 42 of the end portion 40 and is entirely enveloped by the latter.
  • the axial retention of the sealing ring 32 is ensured by means of an internal radial shoulder 44 which extends from the free end edge of the end portion 40.
  • the sealing ring comprises a first internal radial lip 46 which cooperates with the valve stem 10 and a second axial lip 48 which cooperates with the radial end face 50 of the projecting part 18 of the guide 14.
  • the ring with two lips 32 thus seal between the valve stem 10 and valve guide 14.
  • the base portion 38 of the single element 22 comprises a series of legs 52 distributed angularly around the axis X-X.
  • Each of the tabs 52 extends radially inwards in the direction of the axis X-X, its free end being bent axially upwards.
  • Each of the legs 52 is received in an internal radial groove 54 formed in the projecting part 18 of the valve guide 14 to constitute means of axial immobilization of the element 22 relative to the guide 14 and of the guide 14 relative to the cylinder head 12 in the axial direction downwards considering the figure.
  • the single element 22 therefore makes it possible to simultaneously ensure the support function of the spring 26 on the face 20 of the cylinder head, the maintenance of the sealing ring 32 from the inside of the cylindrical part which fully protects it from shocks during handling, centering of the sealing ring and the bearing cup with respect to the valve guide, centering of the spring 26 from the outside of the cylindrical part which also serves for gripping the single element by an automatic mounting device and the axial retention of the valve guide 14 by the immobilizing lugs 52.
  • the radial clearance "r" between the cylindrical part 30 of the element 22 and the interior of the spring 26 can be small without risking interference and damage with the sealing ring 32, as in the case of elements known from the prior art, the ring 32 being fully protected.
  • the axial size of the element 22 is also reduced compared to the devices of the prior art, in particular those in which the retaining sleeve must have a particularly large fitting length to ensure good resistance of the ring d sealing on the guide, the latter being pinched between the external cylindrical surface of the guide and the internal cylindrical surface of the sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
EP90400780A 1989-04-12 1990-03-21 Einrichtung zur Führung und Dichtung eines Ventils Withdrawn EP0392893A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8904842 1989-04-12
FR8904842A FR2645937B1 (fr) 1989-04-12 1989-04-12 Dispositif pour le guidage et l'etancheite d'une soupape

Publications (1)

Publication Number Publication Date
EP0392893A1 true EP0392893A1 (de) 1990-10-17

Family

ID=9380645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400780A Withdrawn EP0392893A1 (de) 1989-04-12 1990-03-21 Einrichtung zur Führung und Dichtung eines Ventils

Country Status (2)

Country Link
EP (1) EP0392893A1 (de)
FR (1) FR2645937B1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405751A2 (de) * 1989-06-30 1991-01-02 Dana Corporation Kegelstumpfförmiges Ventilschaft-Dichtungselement
EP0627546B1 (de) * 1993-05-19 1996-10-23 Firma Carl Freudenberg Ventilschaftdichtung
EP0774568A1 (de) * 1995-11-14 1997-05-21 Firma Carl Freudenberg Dichtungsanordnung
EP0566059B1 (de) * 1992-04-14 1997-09-17 RFT S.p.A. Dichtung für eine gegen Federkraft gleitende Stange, insbesondere für einen Ventilschaft einer Brennkraftmaschine
EP0898056A2 (de) 1997-08-21 1999-02-24 CR Elastomere GmbH Abdichtung für relativ zueinander hin- und hergehende Maschinenteile
WO2003021085A1 (en) * 2001-08-28 2003-03-13 Dana Corporation Valve stem seal assembly with valve guide retainer
GB2381051A (en) * 2001-10-18 2003-04-23 Skf Ab A valve stem seal
WO2014137362A1 (en) * 2013-03-07 2014-09-12 Freudenberg-Nok General Partnership Pressure support for engine valve stem seals
US9371749B2 (en) 2012-02-08 2016-06-21 Dana Automotive Systems Group, Llc Hybrid valve stem seal retainer assembly
WO2016124923A1 (en) * 2015-02-03 2016-08-11 Fluid Energy Solutions International Limited Sealing unit and fluid engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1245461A (fr) * 1959-02-05 1960-11-04 Joints d'étanchéité perfectionnés
FR1479989A (fr) * 1966-05-16 1967-05-05 Dana Corp Dispositif d'étanchéité pour tige de soupape
WO1988004357A1 (en) * 1986-12-09 1988-06-16 Ford Motor Company Limited Valve assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1245461A (fr) * 1959-02-05 1960-11-04 Joints d'étanchéité perfectionnés
FR1479989A (fr) * 1966-05-16 1967-05-05 Dana Corp Dispositif d'étanchéité pour tige de soupape
WO1988004357A1 (en) * 1986-12-09 1988-06-16 Ford Motor Company Limited Valve assembly

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405751B1 (de) * 1989-06-30 1995-03-01 Dana Corporation Kegelstumpfförmiges Ventilschaft-Dichtungselement
EP0405751A2 (de) * 1989-06-30 1991-01-02 Dana Corporation Kegelstumpfförmiges Ventilschaft-Dichtungselement
EP0566059B1 (de) * 1992-04-14 1997-09-17 RFT S.p.A. Dichtung für eine gegen Federkraft gleitende Stange, insbesondere für einen Ventilschaft einer Brennkraftmaschine
EP0627546B1 (de) * 1993-05-19 1996-10-23 Firma Carl Freudenberg Ventilschaftdichtung
KR100238502B1 (ko) * 1995-11-14 2000-01-15 볼프강 셰플러, 헤르베르트 몰덴하우어 밸브스템 밀봉 조립체
EP0774568A1 (de) * 1995-11-14 1997-05-21 Firma Carl Freudenberg Dichtungsanordnung
US6227548B1 (en) 1997-08-21 2001-05-08 Cr Elastomere Gmbh Seal for machine parts that reciprocate relative to one another
DE19736321A1 (de) * 1997-08-21 1999-03-11 Cr Elastomere Gmbh Abdichtung für relativ zueinander hin- und hergehende Maschinenteile
EP0898056A2 (de) 1997-08-21 1999-02-24 CR Elastomere GmbH Abdichtung für relativ zueinander hin- und hergehende Maschinenteile
WO2003021085A1 (en) * 2001-08-28 2003-03-13 Dana Corporation Valve stem seal assembly with valve guide retainer
US6679502B1 (en) 2001-08-28 2004-01-20 Dana Corporation Valve stem seal assembly with valve guide retainer
GB2381051A (en) * 2001-10-18 2003-04-23 Skf Ab A valve stem seal
GB2381051B (en) * 2001-10-18 2005-01-26 Skf Ab Valve stem seal
US6877719B2 (en) 2001-10-18 2005-04-12 Ab Skf Valve shaft seal
US9371749B2 (en) 2012-02-08 2016-06-21 Dana Automotive Systems Group, Llc Hybrid valve stem seal retainer assembly
WO2014137362A1 (en) * 2013-03-07 2014-09-12 Freudenberg-Nok General Partnership Pressure support for engine valve stem seals
US8893681B2 (en) 2013-03-07 2014-11-25 Freudenberg-Nok General Partnership Pressure support for engine valve stem seals
WO2016124923A1 (en) * 2015-02-03 2016-08-11 Fluid Energy Solutions International Limited Sealing unit and fluid engine

Also Published As

Publication number Publication date
FR2645937A1 (fr) 1990-10-19
FR2645937B1 (fr) 1991-08-30

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