EP4264021A1 - Joint de tige de soupape comprenant un dispositif de rotation de soupape - Google Patents

Joint de tige de soupape comprenant un dispositif de rotation de soupape

Info

Publication number
EP4264021A1
EP4264021A1 EP21815156.1A EP21815156A EP4264021A1 EP 4264021 A1 EP4264021 A1 EP 4264021A1 EP 21815156 A EP21815156 A EP 21815156A EP 4264021 A1 EP4264021 A1 EP 4264021A1
Authority
EP
European Patent Office
Prior art keywords
valve
seal
valve stem
spring
cylinder head
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
EP21815156.1A
Other languages
German (de)
English (en)
Other versions
EP4264021B1 (fr
Inventor
Dirk Schober
Frank Zwein
Florian Ringeling
Thorsten MATTHIAS
Stefan Kellermann
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.)
Federal Mogul Valvetrain GmbH
Original Assignee
Federal Mogul Valvetrain 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 Federal Mogul Valvetrain GmbH filed Critical Federal Mogul Valvetrain GmbH
Publication of EP4264021A1 publication Critical patent/EP4264021A1/fr
Application granted granted Critical
Publication of EP4264021B1 publication Critical patent/EP4264021B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F01L1/32—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
    • 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
    • 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
    • F01L2301/00—Using particular materials

Definitions

  • the present invention relates to a valve stem seal intended to seal a valve stem in an internal combustion engine with respect to a cylinder head, the valve stem seal being further combined with a valve rotating device which rotates the valve through a small angle about its longitudinal axis with each actuation.
  • V alve stem seals are used on the one hand to prevent oil from getting through the gap between the valve stem and the valve guide into the intake duct or the exhaust duct of the engine and being burned there, which on the one hand wastes oil and on the other hand worsens exhaust gas limit values. Furthermore, valve stem seals should prevent combustion gases from entering the cylinder head via the exhaust duct and the gap between the valve stem and valve guide and contaminating the oil there or increasing the pressure in the oil circuit.
  • Valve stem seals as such are already known from various applications. Valve stem seals serve to protect the intake duct and the exhaust gas duct in the cylinder head against the ingress of oil into the intake and exhaust tract and the oil circuit against contamination from the intake and exhaust tract. Caps are usually provided here, which are attached to the valve guides and press a seal against a valve stem. The most important task is to prevent oil in the cylinder head from getting into the engine or combustion chamber when the engine is upright.
  • Valve rotation devices based on a combination of balls, springs and ramps are also known and are preferably placed at an upper end of a valve.
  • Valve rotation devices with a spring concept are also known. This is usually a combination of a disc spring with several rolling elements that run on inclined planes, and when the valve opens, it rotates a little around the shaft axis of the valve stem, so that the valve disc rotates a few degrees of angle in relation to the valve seat each time it opens, whereby a One-sided wear on the valve seat and on the valve plate is prevented.
  • the conventional valve turning device is usually attached at the top in the area of the valve spring plate.
  • Other types of valve rotating devices are known in the form of RotocoilTM or also RotocapTM valve rotating devices.
  • the present invention is based on the object of improving a component which was previously only provided for a single task in such a way that several subtasks can be solved simultaneously with this component.
  • the present invention makes it possible to combine previously separate components in one unit and thus reduce the storage, handling and assembly costs for internal combustion engines.
  • the production costs will be below the combined production costs of the individual parts.
  • Increased integration of the components can be achieved here, which also enables material and resource savings.
  • a valve rotator is provided with a valve stem seal.
  • the valve rotating device includes a cylinder head support that is intended to rest against or on a cylinder head.
  • the valve rotating device also includes a spring bearing that is intended to bear against at least one valve spring during operation and to support it in the direction of the cylinder head.
  • the valve rotating device is set up to rotate the spring bearing during operation, in particular when the valve is actuated, in particular when the valve is opened, relative to the cylinder head support.
  • this rotation is transmitted to a valve stem end via a spring plate which bears against the spring at the top.
  • valve rotating device When the valve is opened, the valve is rotated around the valve stem, since the valve disk is lifted off the valve seat of the cylinder head and is no longer blocked in the direction of rotation by frictional locking.
  • the valve rotating device is characterized in that a valve stem seal is attached to the cylinder head support of the valve rotating device, which is set up to rest against a valve stem and seal it during rotary and axial movements of the valve or valve stem.
  • the valve rotating device is only provided with a seal on the valve stem, but not with a seal against a valve guide or the cylinder head.
  • the sealing effect is achieved simply by a certain viscosity of the engine oil between the cylinder head seat and the cylinder head in combination with the spring force of the valve spring, which presses the cylinder head seat onto the cylinder head.
  • a static sealing effect can also be achieved here without a separate seal, provided the gap dimensions and the surface quality as well as the contact pressure from the valve spring are sufficient.
  • valve rotation device further comprises a seal configured to axially seal the cylinder head seat against a surface of the cylinder head; this gasket can also be referred to as a cylinder head bearing gasket.
  • An axial seal can be provided here, which seals an underside of the cylinder head support against the cylinder head.
  • the entire underside of the cylinder head support can be provided with a thin layer of elastomer or an elastomer paint.
  • a relatively low contact pressure can be used to achieve a sufficient sealing effect without having to implement a particularly complicated sealing geometry or a particularly sophisticated sealing lip. It is also possible to introduce or insert a seal acting in the axial direction in a corresponding recess or groove in an underside of the cylinder head support, with which a higher surface pressure and a limitation of compression of the seal can be easily achieved.
  • a special form of this seal can be embodied as an axial-acting seal, which acts in the axial direction against an end face of a valve stem guide.
  • This design has the advantage that the valve stem seal and the seal that acts on the end face of the valve stem guide or the valve stem guide end face seal can be made in one piece. Furthermore, this design allows a very small sealing space to be produced, which means that the space between the valve stem seal and the valve stem guide end face seal can be kept very small, so that a back pressure builds up very quickly in this space, so that a fluid from an exhaust gas duct or an intake duct can flow between valve stem and valve stem guide flows upwards.
  • This is a simple and compact embodiment of the present invention that seals the gap to both the valve stem and cylinder head.
  • the force of the valve spring helps to achieve a sufficient sealing effect, while a desired defined compression of the seal can be achieved over a distance from a contact surface.
  • valve stem seal also includes a seal that is set up to seal the cylinder head support against a lateral surface of a valve stem guide.
  • the seal can also be referred to as a valve stem guide shell seal.
  • the seal is designed here as a radial seal, which can also be designed to center the cylinder head support in relation to the valve stem guide. The design makes it very easy to achieve a desired compression of the seal. This design can also be combined with the valve stem guide face seal.
  • valve stem sealed valve rotating device further includes a seal configured to radially outwardly seal the cylinder head seat.
  • This external radial seal can be used when recesses are provided in the cylinder head for the valve springs or the valve rotating devices to rest on.
  • This design has the advantage that the gasket can very easily center the cylinder head support in relation to the valve stem, even with relatively small dimensions. It is also possible to implement this design with an O-ring which is inserted into a corresponding groove in an outer surface of the valve rotating device or the cylinder head support of the valve rotating device.
  • the turning device comprises at least one plate spring
  • Rolling elements and springs and at least one roller or plain bearing are traditionally provided in valve rotators.
  • the rolling elements are usually arranged on an inclined plane and can roll against a spring support and turn it further by an angular range when actuated. It is also possible to provide rolling elements that only perform a tilting movement.
  • a spring bearing surface of the spring bearing is provided with an anti-twist device for the valve spring.
  • An associated valve spring plate is preferably also provided with an anti-twist device for the valve spring for attachment to the end of the valve stem.
  • valve rotating device which is arranged between the cylinder head and the valve spring.
  • the following will be mainly described embodiments that are arranged between the valve spring and a valve stem end.
  • valve spring plate and valve stem attachment are used here instead of spring seat and cylinder head seat.
  • a valve rotating device with a valve stem seal is provided, wherein a valve rotating device is provided with a spring seat and a valve stem attachment.
  • the valve stem attachment is set up to be attached to a valve stem end during operation, for example with tapered pieces, with this connection in the circumferential direction being designed to be frictional or force-locking, preferably even form-locking.
  • the valve turning device is set up to turn the valve stem attachment relative to the spring plate during operation.
  • the valve rotator is provided at the valve stem mount of the valve rotator with a valve stem seal configured to sealingly engage a valve stem.
  • only the valve stem attachment is to be sealed off from a valve stem.
  • the valve stem seal can be designed as a static seal here, since there should be no movement between the valve stem attachment and the valve stem.
  • valve rotating device with a valve stem seal further comprises a seal which is set up to seal the valve stem attachment against a lateral surface of a valve stem guide.
  • This seal can also be referred to below as a valve stem guide seal.
  • the seal is designed here as a radial seal, which allows displacement both in the axial direction and in the circumferential direction. The movement of the valve stem attachment relative to the cylinder head must be absorbed by the valve stem guide seal.
  • the valve stem guide seal can be designed as a radial inner seal or as a radial outer seal.
  • valve stem guide seal When designed as a radial inner seal, the valve stem guide seal surrounds the valve stem guide from the outside and slides up and down on this outer surface. This may require some form of grommet or tube attachment to the valve stem attachment.
  • the length and shape of the engine's valve stem guides should be adapted to this type of seal.
  • valve stem guide seal When designed as a radial outer seal, the valve stem guide seal should be on engage an extended pipe extension on the valve stem guide and seal it inwards.
  • this design requires the use of adapted valve stem guides, which have a circular-cylindrical outer surface in the area of the seal, but has the advantage that the seal can be made closer to a valve axis, since the valve stem guides in the area of the seal have a smaller Wall thickness can be performed.
  • a valve stem sealed valve rotator wherein a valve rotator having a spring seat and a valve stem mount is provided.
  • the valve stem attachment is set up to be attached to a valve stem end during operation, for example with tapered pieces, with this connection being designed to be frictional or force-locking, preferably even form-locking.
  • the valve rotating device is set up to rotate the valve stem attachment relative to the spring plate during operation.
  • the valve rotating device is provided with a valve stem seal on the spring plate, which is set up to rest sealingly against a valve stem.
  • only the spring bearing is to be sealed against a valve stem.
  • the connection between the spring seat and the valve stem can be improved.
  • the valve stem seal essentially serves as a radial shaft seal here
  • the valve stem seal seals the rotary movements of the valve.
  • the valve stem seal must also be able to absorb the axial component of the working stroke of the valve turning device, but not that of the entire valve.
  • the valve stem seal can here be arranged to be slightly displaceable in the axial direction in order to only permit sealing against radial movements between the spring seat and the valve stem.
  • This seal can also be referred to below as a valve stem guide seal.
  • the seal is designed here as a radial seal that only has to allow displacement in the axial direction. The movement of the spring seat relative to the cylinder head has to be absorbed by the valve stem guide seal, which essentially corresponds to the entire valve lift.
  • the valve stem guide seal can be designed as a radial inner seal or as a radial outer seal, with the radial seal which bears against the outer surface of the valve guide being preferred. When designed as a radial inner seal, the valve stem guide seal surrounds the valve stem guide from the outside and slides up and down on this outer surface. This may require some form of grommet or tube attachment to the valve stem mount.
  • valve stem guide seal When designed as a radial outer seal, the valve stem guide seal should engage and seal inwards on an expanded tube shoulder on the valve stem guide.
  • this design requires the use of adapted valve stem guides, but has the advantage that the seal can be designed to lie closer to a valve axis.
  • This design allows the two sealing components to be separated so that a pure radial shaft seal can be combined with an axial movement seal.
  • the valve stem seal is provided with at least one spring which presses the valve stem seal radially inwardly against a valve stem in order to improve the sealing effect of the valve stem seal.
  • This spring can also be referred to as a valve stem sealing spring and can be designed, for example, as a hose spring.
  • the hose spring allows a constant sealing effect to be achieved largely independently of the current operating temperature.
  • the valve stem seal spring can be made of a metal such as steel, which means that a radial force that is largely independent of the operating temperature can be generated even in cases where an elastomer or rubber material would show a temperature-related reduction in strength.
  • the valve guide seal is provided with at least one spring which presses the valve guide seal radially inward against a lateral surface of a valve guide in order to improve the sealing effect of the valve stem seal.
  • This spring can also be referred to as a valve guide seal spring and can be designed as a hose spring.
  • the hose spring allows a constant sealing effect to be achieved largely independently of the current operating temperature.
  • the valve stem seal spring can be made of a metal such as steel, which can generate a radial force that is largely independent of the operating temperature, even in cases where an elastomer or rubber material would show a temperature-related reduction in strength.
  • a spring bearing surface of the spring bearing or of the spring plate is provided with a Provide anti-twist protection for the valve spring.
  • An associated valve spring plate for attachment to the end of the valve stem or a corresponding contact surface of the valve spring on the cylinder head is also preferably provided with an anti-twist device. This ensures that the rotation generated by the valve rotation device is actually transmitted to the valve. In this embodiment, it can be ruled out that the valve spring will slip in relation to the spring seat or the valve disk and only the spring seat or the valve spring but not the valve itself will be rotated.
  • the present invention is illustrated below with the aid of schematic representations that are not true to scale of various exemplary embodiments.
  • FIGS. 1A to 1E show various embodiments of valve rotating devices with valve stem seals according to the invention, in which a part of a valve rotating device which bears directly on a cylinder head performs the sealing.
  • FIGS. 2A to 2C show valve rotating devices according to the invention with valve stem seals, in which a part of a valve rotating device that is directly connected to a valve spring takes over the sealing.
  • FIGS 3 and 4 illustrate valve rotating assemblies with valve stem seals in accordance with the invention in which sealing is provided at the top of the valve stem end of a valve.
  • the sectional plane itself is shown, giving a clearer view of the rotationally symmetrical components.
  • Figure 1A shows a partial sectional view through a cylinder head 52 at the point where a valve stem 26 emerges from the top of the cylinder head.
  • a valve stem guide is arranged between the cylinder head 52 and the valve stem 26, which can also be omitted, particularly in the embodiments of FIGS. 1A to ID.
  • a valve rotating device with a valve stem seal 2 rests directly on the cylinder head 52, on which a valve spring 12 is supported, which is connected to the valve stem end at the other end (not shown). In the lower part of the valve rotating device with
  • Valve stem seal 2 is the valve rotating device 6 formed and formed with the valve stem seal 4 in the upper part.
  • the valve rotating device 6 rests on the cylinder head 52 with the cylinder head support 8 .
  • Inclined planes 42 are provided in the cylinder head support 8, over which the rolling elements 40, which are shown here as balls, can roll.
  • the rolling elements 40 are each pressed against the upper end of the inclined planes 42 by return springs (not shown).
  • valve spring 12 When the valve is actuated or opened, the valve spring 12 is first compressed until finally the force becomes large enough to compress the disk spring 44 .
  • the disk spring 44 When the disk spring 44 is deformed, it lifts off the cylinder head support 8 on the inside and can roll over the inclined planes 42 against the force of the return hollow springs via the rolling elements 40 . This causes the valve spring 12 to rotate to the left here, which is passed on to the valve stem 56 via the upper end of the valve spring 12 . This rotation can prevent damage to the valve seat or the valve plate from having a greater impact at one point.
  • the cylinder head support 8 rests firmly on the cylinder head and is prevented from rotating by the force of the valve spring 12 .
  • the cylinder head support 8 is further provided with a collar or a projection with which the cylinder head support 8 and thus the entire valve rotating device 6 can be centered with respect to the valve stem guide 54 .
  • a valve stem seal of the cylinder head support 4 is molded onto the cylinder head support 8 or its projection.
  • the valve stem seal of the cylinder head support or cylinder head support valve stem seal 4 is reinforced by a sealing spring 46, which allows a uniform contact pressure of the cylinder head support valve stem seal 4 to be achieved even at different operating temperatures.
  • valve stem guide 56 can also be designed more simply since there is no longer any need to provide an interface for mounting and holding a conventional valve stem seal. This may allow the wall thickness of the valve stem guide to be reduced compared to the conventional design.
  • the present invention thus not only opens up the possibility of combining two components in one, but will also make it possible to revolutionize the entire cylinder head design to the extent that this is possible after more than 100 years of development.
  • FIG 1B shows an embodiment of the valve rotating device with valve stem seal 2 similar to that of Figure 1, with an additional valve stem guide seal or
  • V entilschaftschreibungs- axial seal 16 is provided, which is supported in the axial direction on the end face of the valve shank guide 54 at the top.
  • V entilschaftschreibungs- axial seal 16 is provided, which is supported in the axial direction on the end face of the valve shank guide 54 at the top.
  • Figure IC is the cylinder head support 8 opposite the cylinder head 52, which is provided with a cylinder head support gasket 14, which is designed as a flat gasket. Due to the low tolerances and the low level of roughness on the cylinder head, the cylinder head bearing seal 14 can be designed as a flat seal or with a sealing lacquer or with a thin layer of elastomer. This version corresponds to
  • FIG. 1A Due to the small thickness of the flat gasket, relatively low demands are placed on the material of the cylinder head support gasket 14 here.
  • the cylinder head support 8 is provided on an outside with a circumferential groove into which an O-ring is inserted as an outer seal 20 for the cylinder head support.
  • O-rings are particularly useful as a static seal when placed in an annular groove. After the O-ring has been inserted into the groove, its shape prevents it from falling out of the groove.
  • the cylinder head support 8 and thus the entire valve rotating device 6 can be centered in the cylinder head by the O-ring. Due to the large diameter, very low demands can also be made on the strength here, since a corresponding load is distributed over the entire circumference and thus over a large area.
  • FIG. 1E largely corresponds to the embodiment of FIG. 1A, the cylinder head bearing seal being designed as a combination seal and also serving as a valve stem guide seal or valve stem guide radial seal 18 .
  • the valve spring allows a radial seal to be ensured by compressing the seal 14/18 in the axial direction by the valve spring 12.
  • the cylinder head bearing seal 14 is designed as a static seal, which allows cost-effective production.
  • Figure 1B is the valve stem seal of the cylinder head support 4 and the cylinder head support seal 14 are made in one piece, which is also possible in the figure iE with or without a change in design. It is also envisaged to provide a combination of Figures 1B and IE with a plurality of gaskets attached to the cylinder head seat. It is also possible for several sealing lips to be provided, and the entire design can also deviate from that shown.
  • FIGS. 2A to 2C show a further embodiment in which the valve stem seal is not attached to the cylinder head support but to the spring support 10.
  • the spring seat 10 is provided with a tubular projection which lies around the valve stem guide 54 and projects upwards in the direction of the end of the valve stem.
  • a valve stem seal of the spring bearing layer 22 or spring bearing layer valve stem seal 22 is cast onto the projection of the spring support 10 .
  • This seal may be provided with a sealing spring 46 as shown.
  • This embodiment differs in the attachment point of the valve stem seal 22.
  • the valve stem seal 22 rotates with the valve spring 12 and the valve stem 56, which makes it possible to design the seal as a pure seal for axial displacements. This makes it possible to use a sealing lip or a seal that can only provide a translatory sealing function, but not a rotary sealing function.
  • the gap between the spring seat 10 and the cylinder head seat 8 is reached by the disk spring 44 and by the force with which the valve spring presses the cylinder head seat 8 against the cylinder head 52 .
  • a flat gasket is also provided between the cylinder head support 8 and the cylinder head 52 .
  • FIG. 2B shows a further embodiment in which, in comparison to the embodiment in FIG. 2A, a valve stem guide seal of the spring seat 24 or a spring seat valve stem guide seal 24 is provided.
  • the spring bearing layer valve stem seal 22 can be designed here as a purely translational seal. spring pad
  • valve stem guide seal 24 must be able to seal both translationally and rotationally, with the translational movement being far less than the rotational movement.
  • Figure 2C is intended to illustrate the movement of the valve rotating device. The outlines of Figure 2B are shown in phantom.
  • the rolling elements 40 have rolled down the inclined planes 20 of the cylinder head support 8 and have displaced the spring bearing layer 10 downwards and in a clockwise direction when viewed from above.
  • Figure 3 shows an embodiment in which the valve rotating device 6 is located at the top between the valve stem end and the valve spring.
  • the design essentially corresponds to that of FIGS. 1A to 1E, with the projection being made significantly longer and being sealed both to the valve stem 56 and to the valve stem guide. Depending on the dimensions of the valve stem guide, this can also be advantageous compared to the version with the valve rotating device underneath.
  • the valve spring seat through the
  • Valve spring plate formed and the valve attachment corresponds to the cylinder head support.
  • valve attachment 28 rotates with the valve stem, which is why a static seal can be used to seal between the valve attachment 28 and the valve stem 56 here.
  • This design is particularly suitable for engines with long valve stem guides that protrude far.
  • FIG. 4 essentially corresponds to the embodiment of FIG. 3 with the difference that on the one hand the seals are attached to the valve spring plate 26 and on the other hand there is no seal between the valve stem 56 and the valve attachment 28 . Also these
  • the spring plate 26 is provided with an anti-rotation device 48 for the valve spring 12 and the contact surface of the valve spring 12 on the cylinder head 52 is also provided with an anti-rotation device 50 for the valve spring 12, creating a positive connection between the valve plate and the Cylinder head is achieved, via which the force generated by the rotary device 6 is supported on the engine block can.

Landscapes

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

Abstract

L'invention se rapporte à un dispositif de rotation de soupape comprenant : un joint de tige de soupape (2) ayant un dispositif de rotation de soupape (6) ; un support de culasse (8) ; et un support de ressort (10) destiné à reposer contre un ressort de soupape pendant le fonctionnement. Le dispositif de rotation de soupape est conçu pour faire tourner le support de ressort par rapport au support de culasse (8) pendant le fonctionnement, et un joint de tige de soupape, qui est conçu pour reposer contre une tige de soupape et pour sceller celle-ci pendant des mouvements de rotation et axiaux, est monté sur le support de culasse (8) du dispositif de rotation de soupape.
EP21815156.1A 2021-03-16 2021-11-16 Joint de tige de soupape comprenant un dispositif de rotation de soupape Active EP4264021B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021106307.8A DE102021106307A1 (de) 2021-03-16 2021-03-16 Ventilschaftvorrichtung mit Ventildrehvorrichtung
PCT/EP2021/081803 WO2022194407A1 (fr) 2021-03-16 2021-11-16 Joint de tige de soupape comprenant un dispositif de rotation de soupape

Publications (2)

Publication Number Publication Date
EP4264021A1 true EP4264021A1 (fr) 2023-10-25
EP4264021B1 EP4264021B1 (fr) 2024-05-22

Family

ID=78790016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21815156.1A Active EP4264021B1 (fr) 2021-03-16 2021-11-16 Joint de tige de soupape comprenant un dispositif de rotation de soupape

Country Status (5)

Country Link
US (1) US12049836B2 (fr)
EP (1) EP4264021B1 (fr)
DE (1) DE102021106307A1 (fr)
PL (1) PL4264021T3 (fr)
WO (1) WO2022194407A1 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH279054A (fr) 1944-10-26 1951-11-15 Thompson Prod Inc Dispositif pour faire tourner une soupape à soulèvement d'un moteur.
DE1264859B (de) 1963-07-19 1968-03-28 Thompson Ramo Wooldridge Inc Vorrichtung zur Abdichtung der Ventilschaft-fuehrung von Brennkraftmaschinenventilen
DE1243934B (de) 1965-06-14 1967-07-06 Dana Corp Ventilschaftdichtung
DE2208466A1 (de) 1972-02-23 1973-08-30 Schaeffler Ohg Industriewerk Vorrichtung zum drehen eines steuerventils
DE3128086A1 (de) * 1981-07-16 1983-02-03 Märkisches Werk GmbH, 5884 Halver Ventildrehvorrichtung iii
US4470383A (en) 1983-07-25 1984-09-11 General Motors Corporation Valve spring damper
US5775284A (en) * 1997-05-07 1998-07-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
US6119645A (en) * 1999-02-16 2000-09-19 Dana Corporation Valve stem seal with non-rotatable retainer
US6244235B1 (en) * 2000-04-18 2001-06-12 Dana Corporation Heavy-duty valve stem seal assembly
DE10325764B3 (de) 2003-06-05 2005-08-04 Carl Freudenberg Kg Ventilschaftabdichtung für Brennkraftmaschinen
US6901902B1 (en) * 2004-02-25 2005-06-07 Freudenberg-Nok General Partnership Two-piece valve stem seal
CA2521353A1 (fr) 2004-09-29 2006-03-29 Dana Corporation Joint de tige de soupape inverse vers le haut
DE602006015673D1 (de) * 2006-12-29 2010-09-02 Corcos Ind S A S Di Externa It Ventilvorrichtung für einen Verbrennungsmotor mit einer zum Ventil koaxial angeordneten Dichtung
JP6083398B2 (ja) * 2014-02-21 2017-02-22 トヨタ自動車株式会社 バルブ回転装置
DE102017126541B3 (de) * 2017-11-13 2018-11-22 Federal-Mogul Valvetrain Gmbh Ventildrehvorrichtung für Verbrennungsmotoren
JP2020169586A (ja) * 2019-04-02 2020-10-15 マツダ株式会社 エンジンの動弁装置

Also Published As

Publication number Publication date
DE102021106307A1 (de) 2022-09-22
US12049836B2 (en) 2024-07-30
WO2022194407A1 (fr) 2022-09-22
US20240141810A1 (en) 2024-05-02
EP4264021B1 (fr) 2024-05-22
PL4264021T3 (pl) 2024-08-26

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