EP1633957A1 - Joint de tige de soupape destine a des moteurs a combustion interne - Google Patents

Joint de tige de soupape destine a des moteurs a combustion interne

Info

Publication number
EP1633957A1
EP1633957A1 EP04718203A EP04718203A EP1633957A1 EP 1633957 A1 EP1633957 A1 EP 1633957A1 EP 04718203 A EP04718203 A EP 04718203A EP 04718203 A EP04718203 A EP 04718203A EP 1633957 A1 EP1633957 A1 EP 1633957A1
Authority
EP
European Patent Office
Prior art keywords
valve stem
sealing part
stem seal
ring
support ring
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.)
Granted
Application number
EP04718203A
Other languages
German (de)
English (en)
Other versions
EP1633957B1 (fr
Inventor
Massimo Martelli
Stefano Bermond
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg 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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP1633957A1 publication Critical patent/EP1633957A1/fr
Application granted granted Critical
Publication of EP1633957B1 publication Critical patent/EP1633957B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • 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
    • 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
    • F01L1/462—Valve return spring arrangements
    • 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

Definitions

  • the invention relates to a valve stem seal for internal combustion engines with a dynamic sealing part resting on a valve stem and a static sealing part resting on a valve guide made of elastomeric materials, the static sealing part being surrounded by a dimensionally stable stiffening ring.
  • Valve stem seals of this type have many uses.
  • the modern valve stem seals have a dynamic seal, which seals the valve stem.
  • the seal is intended to prevent lubricant from getting into the combustion chamber of the internal combustion engine along the valve stem.
  • the static seal lies against the valve stem guide and serves as a fastening part for the dynamic seal.
  • DE 100 28 587 A1 shows a valve train for an internal combustion engine which is provided with a static and a dynamic seal which forms a preassembled unit.
  • the static seal is surrounded by a support body or stiffening ring, which has a radially outwardly extending flange on which the valve spring is supported.
  • valve stem seal of a comparable design is also shown in DE 39 02 518 A1.
  • a wear-resistant valve spring support is arranged on the spring side of this radially bent leg in this valve stem seal.
  • the valve spring support can be designed as an annular disc, which consists of hardened steel. It is advantageous to firmly connect the disc to the tubular body that surrounds the static seal in order to create an installation unit in this way.
  • On the inner circumference of the disc radially inwardly extending tongues are arranged, which are firmly connectable with their radially inner end region to the outer circumference of the tubular body.
  • the disadvantage of this solution is that the valve spring and thus also the valve tappet with the valve disk cannot move freely. The spring works its way into the flange or the annular disk and is thereby prevented from rotating.
  • the invention has for its object to provide a valve stem seal, which enables free rotation of the valve head on the valve seat. This ensures a uniform contact between these parts reached, which in turn leads to a higher compression within the cylinder.
  • valve stem seal of the type mentioned at the outset in that a support ring is provided which is separate from the stiffening ring of the static sealing part and which permits free rotation of the valve spring and the valve spring plate including the valve spring head.
  • the valve stem seal is intended to represent a preassembled unit and for this reason it is advantageous if the support ring is connected to the valve spring during assembly, for example by gluing. Only after assembly the valve stem seal on the cylinder head of the engine should the support ring be released from the valve spring.
  • a particularly advantageous embodiment is achieved in that the support ring and the stiffening ring are initially combined to form a unit and are only separated from the support ring after the valve stem seal has been installed.
  • This is achieved in that the support ring in the form of a support ring is first connected to the stiffening ring via at least one predetermined breaking point, that is to say represents a unit. During assembly, the support ring can be broken off from the stiffening ring by applying the appropriate pressure.
  • the predetermined breaking point it is also possible to design the predetermined breaking point in such a way that it only breaks after the internal combustion engine has been started up and then releases the support ring.
  • the support ring is rotatably placed on a flange of the reinforcement ring which is integrally directed outward with the reinforcement ring and is in contact with the cylinder head.
  • this ring is pressed against the flange by the spring, so that the spring ring and flange with associated stiffening ring are to be considered as belonging to the valve stem unit.
  • the flange with the support ring or the support ring alone can be inserted in a recess in the cylinder head. This counteracts a displacement of the support ring, particularly if the inner diameter of the support ring is relatively large.
  • the positioning of the static sealing part is carried out on the end face of the valve stem guide. This facilitates the assembly of the individual parts.
  • the static sealing part can be provided with an axial ring surface for contact with the end face of the valve stem guide.
  • the stiffening ring has an angle or S shape, the inwardly directed leg being located at the transition to the sealing lip and being encompassed by the elastomer material of the sealing element.
  • the part of the stiffening ring lying in the longitudinal direction of the valve stem guide is connected to the elastomer material of the sealing part essentially over the entire length of its inner surface.
  • the valve stem guide consists of a tube with a constant inside and outside diameter over its entire length.
  • Figure 1 shows a valve stem seal in longitudinal section with indicated
  • Figure 2 shows the valve stem seal according to Figure 1 after breaking off the support ring
  • Figure 3 shows a longitudinal section through a valve stem seal with a separate support ring on the flange of the stiffening ring
  • valve stem seal 1 shows the left side of a valve stem seal 1 in longitudinal section.
  • the valve stem with valve head and valve plate are omitted for the sake of clarity.
  • the valve stem seal 1 consists of the dynamic sealing part 2 which is in contact with the valve stem and which is formed from an elastomeric material and has the sealing lip 3.
  • the sealing lip 3 is pressed against the valve stem by a helical spring 4.
  • the valve stem itself is guided in the valve stem guide 5.
  • the static sealing part 6 of the seal is placed on the valve stem guide 5.
  • the static seal 6 is surrounded by the stiffening ring 7 made of metal.
  • the stiffening ring 7 is S-shaped and its inwardly directed leg 9, which lies at the transition to the sealing lip 3, is encompassed by the elastomer material of the sealing part 2.
  • the stiffening ring 7 is provided with a step-like and radially outwardly directed flange 10.
  • the flange 10 is supported on the
  • the flange 10 in turn rests on the cylinder head 12 of the internal combustion engine.
  • the flange 10 is preferably at the point 13 Provide a predetermined breaking point, which results in a separation of the outermost flange part from the stiffening ring 7 during the assembly of the valve stem seal 1 or after a short start-up of the internal combustion engine.
  • the separated flange part represents the support ring 14 for the valve spring 11, which can rotate with the spring 11 independently of the stiffening ring 7. With 15 two further predetermined breaking points are indicated, of which one can take the place of the predetermined breaking point 13.
  • the predetermined breaking point 13 is preferred.
  • FIG. 2 shows the right side of the valve stem seal according to FIG. 1 after the support ring 14 has been separated from the stiffening ring 7. The two parts are then independent of one another. So that a displacement of the support ring 14 with respect to the stiffening ring or the valve stem guide 5 does not occur, there is a recess 16 in the cylinder head 12, which radially encompasses the support ring 14 or its outer edge.
  • Figure 3 shows an embodiment in longitudinal section in which the basic structure of the valve stem seal 1, as shown in Figures 1 and 2, is retained. Deviating is the design of the stiffening body 7, which has been designed without predetermined breaking points.
  • the outer flange part 10 of the stiffening body 7 is equipped with a separate support ring 20, which rests on the flange which is integrally connected to the stiffening ring 7 and faces outwards and lies against the cylinder head 12.
  • the support ring 20 is rotatably arranged and made of a high-strength material in contrast to the stiffening ring 7, which can be made of a cheaper material.
  • the bearing ring 20 lying loosely on the flange 10 can rotate freely with the spring 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

L'invention concerne un joint de tige de soupape destiné à des moteurs à combustion interne, comportant un élément de joint dynamique s'appuyant contre une tige de soupape, et un élément de joint statique s'appuyant contre le guide de tige de soupape, les deux éléments de joint étant réalisés en matériaux élastomères. L'élément de joint statique est entouré par un corps de renforcement rigide, et un anneau support (14) séparé de l'anneau de renforcement (7) de l'élément de joint statique (6) permet une rotation libre du ressort de soupape (11) et de la tête du ressort de soupape.
EP04718203A 2003-06-05 2004-03-06 Joint de tige de soupape destine a des moteurs a combustion interne Expired - Lifetime EP1633957B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10325764A DE10325764B3 (de) 2003-06-05 2003-06-05 Ventilschaftabdichtung für Brennkraftmaschinen
PCT/EP2004/002324 WO2004109067A1 (fr) 2003-06-05 2004-03-06 Joint de tige de soupape destine a des moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1633957A1 true EP1633957A1 (fr) 2006-03-15
EP1633957B1 EP1633957B1 (fr) 2009-09-30

Family

ID=33494869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04718203A Expired - Lifetime EP1633957B1 (fr) 2003-06-05 2004-03-06 Joint de tige de soupape destine a des moteurs a combustion interne

Country Status (3)

Country Link
EP (1) EP1633957B1 (fr)
DE (2) DE10325764B3 (fr)
WO (1) WO2004109067A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113710879A (zh) * 2019-05-13 2021-11-26 Nok株式会社 阀杆密封件

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004938B4 (de) * 2004-01-31 2007-11-29 Ab Skf Dichtungsanordnung
US9416690B2 (en) * 2009-07-30 2016-08-16 Freudenberg-Nok General Partnership Reduced inertia valve stem seal flange
CN104564209A (zh) * 2015-01-13 2015-04-29 十堰东森汽车密封件有限公司 一种载重车用天然气气门油封
KR102251417B1 (ko) * 2020-03-11 2021-05-12 평화오일씰공업 주식회사 밸브 스템 씰 및 이를 구비한 내연기관 밸브
DE102021106307A1 (de) 2021-03-16 2022-09-22 Federal-Mogul Valvetrain Gmbh Ventilschaftvorrichtung mit Ventildrehvorrichtung
DE102021122847A1 (de) * 2021-09-03 2023-03-09 Federal-Mogul Valvetrain Gmbh Ventildrehvorrichtung und Verbundkomponente dafür

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1750200A1 (de) * 1968-04-06 1971-02-11 Alois Ferch Mehrteilige Ventilschaftabdichtung fuer Brennkraftmaschinen od.dgl.
DE3326811A1 (de) * 1983-07-26 1985-02-14 Elring Dichtungswerke Gmbh, 7012 Fellbach Schaft- oder wellenabdichtung, insbesondere ventilschaftabdichtung
DE3711436C1 (de) * 1987-04-04 1988-07-21 Goetze Ag Montagevorrichtung fuer Ventilschaftabdichtungen
DE3902518A1 (de) * 1989-01-28 1990-08-02 Goetze Ag Ventilschaftabdichtung
US5174256A (en) * 1991-11-25 1992-12-29 Dana Corporation Variable guide height valve seal
US5775284A (en) * 1997-05-07 1998-07-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
US6205969B1 (en) * 1999-12-22 2001-03-27 Dana Corporation Multi-seal retainer assembly and method for making the same
DE10028587A1 (de) * 2000-06-14 2002-01-03 Freudenberg Carl Fa Ventilbetrieb einer Verbrennungskraftmaschine
JP2002070510A (ja) * 2000-08-25 2002-03-08 Murata Hatsujo Kk バルブ回転装置を具備する弁機構

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004109067A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113710879A (zh) * 2019-05-13 2021-11-26 Nok株式会社 阀杆密封件

Also Published As

Publication number Publication date
WO2004109067A1 (fr) 2004-12-16
DE10325764B3 (de) 2005-08-04
DE502004010167D1 (de) 2009-11-12
EP1633957B1 (fr) 2009-09-30

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