EP4264021B1 - 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 Download PDF

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Publication number
EP4264021B1
EP4264021B1 EP21815156.1A EP21815156A EP4264021B1 EP 4264021 B1 EP4264021 B1 EP 4264021B1 EP 21815156 A EP21815156 A EP 21815156A EP 4264021 B1 EP4264021 B1 EP 4264021B1
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EP
European Patent Office
Prior art keywords
valve
seal
valve stem
spring
rotating device
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.)
Active
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EP21815156.1A
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German (de)
English (en)
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EP4264021A1 (fr
Inventor
Dirk Schober
Frank Zwein
Florian Ringeling
Thorsten MATTHIAS
Stefan Kellermann
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Federal Mogul Valvetrain GmbH
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Federal Mogul Valvetrain GmbH
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Publication of EP4264021A1 publication Critical patent/EP4264021A1/fr
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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
    • 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 against a cylinder head, wherein the valve stem seal is further combined with a valve rotating device which rotates the valve by a small angle about its longitudinal axis upon each actuation.
  • Valve stem seals are used to prevent oil from entering the intake duct or exhaust duct of the engine through the gap between the valve stem and the valve guide and being burned there, which on the one hand wastes oil and on the other hand worsens exhaust emission limits. Valve stem seals are also intended to prevent combustion gases from entering the cylinder head via the exhaust duct and the gap between the valve stem and the valve guide, where they can contaminate the oil or increase 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 port or the exhaust port in the cylinder head against oil entering the intake or exhaust tract and to protect the oil circuit against contamination from the intake or exhaust tract. Caps are usually provided here that 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 entering the engine or combustion chamber when the engine is standing upright.
  • Valve turning devices are also known that are based on a combination of balls, springs and inclined planes, and are preferably arranged at the upper end of a valve.
  • Valve turning devices with a spring concept are also known. These are usually combinations of a disc spring with several rolling elements that run on inclined planes and, when the valve is opened, rotate a little around the shaft axis of the valve stem, so that the valve disc rotates by a few degrees relative to the valve seat each time it is opened, which creates a one-sided wear on the valve seat and 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 turning devices are known in the form of Rotocoil TM or Rotocap TM valve turning devices. In CA 2 298 222 A1 , JP 2020 169586 A , US 2017/058724 A1 , US 4 470 383 A or DE 31 28 086 A1 Further examples of valve rotating devices are disclosed.
  • the present invention is based on the object of improving a component which was previously only intended 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 into one unit, thus reducing the storage, handling and assembly costs for combustion engines.
  • the manufacturing costs will be lower than the combined manufacturing costs of the individual parts. This allows for increased integration of the components, which also enables material and resource savings.
  • a valve turning device with a valve stem seal comprises a cylinder head support which is intended to rest on or against a cylinder head.
  • the valve turning device also comprises a spring support which
  • the valve rotating device is designed to rotate the spring support relative to the cylinder head support during operation, in particular when the valve is actuated, in particular when the valve is opened. By rotating the at least one valve spring on a base, this rotation is transmitted to a valve stem end via a spring plate which rests on the top of the spring. When the valve is opened, the valve is rotated about the valve stem because the valve plate lifts off the valve seat of the cylinder head and is no longer blocked by friction in the direction of rotation.
  • 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 designed to rest against a valve stem and seal it during rotational and axial movements of the valve or valve stem.
  • the valve turning 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 simply achieved by a certain viscosity of the engine oil between the cylinder head support and the cylinder head in combination with the spring force of the valve spring, which presses the cylinder head support onto the cylinder head.
  • a static sealing effect can also be achieved 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 that is designed to seal the cylinder head support in the axial direction against a surface of the cylinder head; this seal can also be referred to as a cylinder head support seal.
  • An axial seal can be provided here that 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 elastomer layer or an elastomer varnish.
  • 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 that acts 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 compression limit of the seal can be easily achieved.
  • a special form of this seal can be designed as an axially acting seal that acts in the axial direction against a front side of a valve stem guide.
  • This design has the advantage that the valve stem seal and the seal that acts on the front side of the valve stem guide or the valve stem guide front side seal can be designed as one piece. Furthermore, this design makes it possible to create a very small sealing space, whereby the space between the valve stem seal and the valve stem guide front side seal can be kept very small, so that a counter pressure builds up very quickly in this space, so that a fluid flows upwards from an exhaust duct or an intake duct between the valve stem and the valve stem guide.
  • This is a simple and compact version of the present invention that seals the gap both to the valve stem and to the 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 to a contact surface.
  • valve rotating device with Valve stem seal also includes a seal that is designed to seal the cylinder head support against a jacket surface of a valve stem guide.
  • the seal can also be referred to as a valve stem guide jacket surface 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 the desired compression of the seal. This design can also be combined with the valve stem guide face seal.
  • valve rotating device with valve stem seal also includes a seal that is designed to seal the cylinder head support radially outward.
  • This external radial seal can be used if 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 seal can easily center the cylinder head support relative to the valve stem, even with relatively small dimensions. It is also possible to implement this design using an O-ring that is inserted into a corresponding groove on an outer surface of the valve rotating device or the cylinder head support of the valve rotating device.
  • the rotating device comprises at least one disc spring, rolling elements and springs as well as at least one rolling or plain bearing. These components are conventionally provided in valve rotating devices.
  • the rolling elements are usually arranged on an inclined plane and can roll against a spring support and rotate it further by an angular range when actuated. Rolling elements can also be provided that only perform a tilting movement.
  • a spring support surface of the spring support is provided with an anti-twist device for the valve spring.
  • an associated valve spring plate for attachment to the valve stem end is also provided with an anti-twist device for the valve spring.
  • valve rotating device which is arranged between the cylinder head and the valve spring. mainly describes designs that are arranged between the valve spring and a valve stem end.
  • valve spring retainer and valve stem attachment are used instead of spring support and cylinder head support.
  • a valve rotating device with a valve stem seal wherein a valve rotating device is provided with a spring support or a spring plate and a valve stem fastening.
  • the valve stem fastening is designed to be fastened to a valve stem end during operation, for example with conical pieces, wherein this connection should be frictionally or non-positively locked in the circumferential direction, preferably even positively locked.
  • the valve rotating device is designed to rotate the valve stem fastening relative to the spring plate during operation.
  • the valve rotating device is provided with a valve stem seal on the valve stem fastening of the valve rotating device, which is designed to seal against a valve stem.
  • only the valve stem fastening is to be sealed against a valve stem.
  • the connection between the valve stem fastening and the valve stem can be improved in this way.
  • the valve stem seal can be designed here as a static seal, since no movement should occur between the valve stem fastening and the valve stem.
  • This seal can also be referred to as a valve stem guide seal.
  • the seal is designed here as a radial seal which allows displacement in both the axial direction and 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 surrounds the valve stem guide from the outside and slides up and down on this outer surface. This may require a type of grommet or tube attachment on 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 external seal, the valve stem guide seal should be an extended pipe attachment on the valve stem guide and seal it inwards.
  • This design requires the use of adapted valve stem guides that have a circular cylindrical outer surface in the area of the seal, but has the advantage that the seal can be designed closer to a valve axis, since the valve stem guides in the area of the seal can be designed with a smaller wall thickness.
  • a valve rotating device with a valve stem seal wherein a valve rotating device is provided with a spring support or a spring plate and a valve stem fastening.
  • the valve stem fastening is designed to be fastened to a valve stem end during operation, for example with conical pieces, wherein this connection should be frictionally or non-positively locked, preferably even positively locked.
  • the valve rotating device is designed to rotate the valve stem fastening relative to the spring plate during operation.
  • the valve rotating device is provided with a valve stem seal on the spring plate, which is designed to seal against a valve stem. In this embodiment, only the spring support should be sealed against a valve stem.
  • connection between the spring support and the valve stem can be improved in this way, for example.
  • the valve stem seal essentially serves as a radial shaft seal, which must absorb rotary movements and small axial movements.
  • the valve stem seal seals the rotary movements of the valve.
  • the valve stem seal must also be able to absorb the axial portion of the working stroke of the valve rotating device, but not of the entire valve.
  • the valve stem seal can be arranged so that it can be easily displaced in the axial direction in order to only provide a seal against radial movements between the spring support and the valve stem.
  • This seal can also be referred to as a valve stem guide seal.
  • the seal is designed here as a radial seal which only has to allow displacement in the axial direction. The movement of the spring support relative to the cylinder head must be absorbed by the valve stem guide seal, which essentially corresponds to the entire valve stroke.
  • the valve stem guide seal can be designed as a radial inner seal or as a radial outer seal, with the radial seal which rests on the outer surface of the valve guide being preferred.
  • 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 kind of grommet or tube attachment on the valve stem mount.
  • valve stem guide seal should engage an extended pipe extension on the valve stem guide and seal it inwards.
  • this design requires the use of adapted valve stem guides, but has the advantage that the seal can be designed 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 that presses the valve stem seal radially inward 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 seal spring and can be designed as a hose spring, for example.
  • the hose spring can achieve a constant sealing effect largely independent 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.
  • the valve guide seal is provided with at least one spring that presses the valve guide seal radially inward against a jacket 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 can achieve a constant sealing effect largely independent 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 support surface of the spring support or that of the spring plate is provided with a Provided with an anti-twisting device for the valve spring.
  • an associated valve spring plate for attachment to the valve stem end or a corresponding support surface of the valve spring on the cylinder head is also provided with an anti-twisting device.
  • Figure 1A represents 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. Between the cylinder head 52 and the valve stem 56, a valve stem guide is arranged, which is particularly useful in the embodiments of the Figures 1A to 1D can also be omitted.
  • a valve rotating device with 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).
  • the valve rotating device 6 is formed in the lower part of the valve rotating device with valve stem seal 2 and the one with valve stem seal 4 is molded onto 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 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).
  • a spring support 10 is arranged above the cylinder head support 8, on which the valve spring 12 rests.
  • a disk spring 44 is also arranged between the cylinder head support 8 and the spring support 10, keeping these two elements at a distance from one another.
  • 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 relative 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 seal can now be dispensed with, since these two elements could be combined in a more complex component.
  • the cylinder head support 8 is sealed by a combination of the contact pressure of the valve spring and a lubricant present in the cylinder head without a separate seal being necessary.
  • the valve stem guide 56 can also be designed more simply, since an interface for mounting and holding a conventional valve stem seal no longer has to be provided. This can make it possible to reduce the wall thickness of the valve stem guide compared to the conventional design.
  • the present invention therefore not only opens up the possibility of combining two components into one, but will also make it possible to largely revolutionize the entire cylinder head design, as far as this is possible after more than 100 years of development.
  • Figure 1B shows a design of the valve rotating device with valve stem seal 2 similar to that of Figure 1 , whereby a valve stem guide seal or valve stem guide axial seal 16 is also provided, which is supported at the top in the axial direction on the front side of the valve stem guide 54.
  • This design makes it possible to keep the space between the cylinder head support valve stem seal 4 and the valve stem guide axial seal 16 very small.
  • a counterpressure can be built up very quickly, which effectively prevents any further flow of fluids. can prevent.
  • the valve stem guide 54 and the projection of the cylinder head support 8 are larger or longer, which can result in advantages in the guidance of the valve stem 56.
  • the function of the valve turning device 6 corresponds to that of the Figure 1 .
  • Figure 1C 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 roughness on the cylinder head, the cylinder head support gasket 14 can be designed as a flat gasket or also by a sealing varnish or by a thin elastomer layer. This design essentially corresponds to the Figure 1A Due to the low thickness of the flat gasket, relatively low demands are placed on the material of the cylinder head gasket 14.
  • the cylinder head support 8 is provided on one outside with a circumferential groove into which an O-ring is inserted as a cylinder head support outer seal 20.
  • O-rings are particularly suitable as a static seal when they are inserted in an annular groove. After the O-ring is inserted in the groove, its shape prevents it from falling out of the groove.
  • the O-ring can be used to center the cylinder head support 8 and thus the entire valve rotating device 6 in the cylinder head. Due to the large diameter, very low requirements can be placed on the strength here, since a corresponding load is distributed over the entire circumference and thus over a large area.
  • the Figure 1E largely corresponds to the execution of Figure 1A , whereby the cylinder head support gasket is designed as a combination seal and also serves 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 gasket 14 is designed as a static gasket, which allows for cost-effective production.
  • 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 the case with the Figure 1E is possible with or without a change in the design. It is also possible to combine the Figures 1B and 1E with several seals attached to the cylinder head support. Several sealing lips can also be provided and the overall design can also differ from that shown.
  • FIGS 2A to 2C show a further design in which the valve stem seal is not attached to the cylinder head support but to the spring support 10.
  • the spring support 10 is provided with a tubular projection which lies around the valve stem guide 54 and projects upwards beyond it towards the end of the valve stem.
  • a valve stem seal of the spring support 22 or spring support valve stem seal 22 is cast onto the projection of the spring support 10.
  • This seal can be provided with a sealing spring 46 as shown.
  • This design 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 displacement. This makes it possible to use a sealing lip or a seal which can only provide a translational sealing function but not a rotational sealing function.
  • the gap between the spring support 10 and the cylinder head support 8 is achieved by the plate spring 44 and by the force with which the valve spring presses the cylinder head support 8 against the cylinder head 52.
  • a flat gasket is provided between the cylinder head support 8 and the cylinder head 52.
  • FIG. 2B shows another version, in which, compared to the version of the Figure 2A a valve stem guide seal of the spring support 24 or a spring support valve stem guide seal 24 is provided.
  • the spring support valve stem seal 22 can be designed here as a pure translational seal.
  • Spring support valve stem guide seal 24 must, however, be able to seal both translationally and rotationally, with the translational movement being far smaller than the rotational movement.
  • Figure 2C is intended to illustrate the movement of the valve rotating device.
  • the outline of the Figure 2B are shown in dashed lines.
  • the rolling elements 40 have rolled down the inclined planes 20 of the cylinder head support 8 and have displaced the spring support 10 downwards and, when viewed from above, clockwise.
  • Figure 3 represents an embodiment in which the valve rotating device 6 is arranged at the top between the valve stem end and the valve spring.
  • the embodiment essentially corresponds to that of the Figures 1A to 1E , whereby the projection is significantly longer and is sealed to both the valve stem 56 and the valve stem guide.
  • the valve spring support is formed by the valve spring plate and the valve fastening corresponds to the cylinder head support.
  • valve mount 28 rotates with the valve stem, which is why a static seal can be used to seal between the valve mount 28 and the valve stem 56.
  • This design is particularly suitable for engines with long valve stem guides that protrude far.
  • Figure 4 essentially corresponds to the execution of Figure 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 mounting 28.
  • This design is also particularly suitable for engines with long valve stem guides that protrude far.
  • the spring plate 26 is provided with an anti-twist device 48 for the valve spring 12 and the support surface of the valve spring 12 on the cylinder head 52 is also provided with an anti-twist device 50 for the valve spring 12, whereby a positive connection between the valve plate and the cylinder head is achieved, via which the force generated by the rotating device 6 is supported on the engine block can.

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

Claims (14)

  1. Dispositif de rotation de soupape avec joint (2) de tige de soupape, comprenant un dispositif (6) de rotation de soupape, avec un support de culasse (8) et un support de ressort (10), destiné à s'appuyer en fonctionnement contre (au moins) un ressort de soupape,
    le dispositif (6) de rotation de soupape étant conçu pour, en fonctionnement, faire tourner le support de ressort par rapport au support de culasse (8),
    un joint (4) de tige de soupape est monté sur le support de culasse (8) du dispositif (6) de rotation de soupape, lequel est conçu pour s'appliquer contre une tige de soupape (56) et la rendre étanche lors de mouvements rotatifs et axiaux de la tige de soupape (56).
  2. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon la revendication 1,
    comprenant en outre un joint d'étanchéité (14) conçu pour assurer l'étanchéité du support de culasse (8) contre une surface de la culasse.
  3. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon la revendication 1 ou la revendication 2,
    comprenant en outre un joint d'étanchéité (16) adapté pour réaliser l'étanchéité du support de culasse (8) contre une face frontale d'un guide (54) de tige de soupape.
  4. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon la revendication 1 ou la revendication 2,
    comprenant en outre un joint d'étanchéité (18), adapté pour réaliser l'étanchéité du support de culasse (8) contre une surface d'enveloppe d'un guide (54) de tige de soupape.
  5. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon la revendication 1, 2 ou 3,
    comprenant en outre un joint d'étanchéité (20), agencé pour rendre étanche le support de culasse (8) radialement vers l'extérieur par rapport à la culasse (52).
  6. Dispositif de rotation de soupape avec joint (2) de tige de soupape, comprenant un dispositif (6) de rotation de soupape, avec un support de culasse (8) et un support de ressort (10), destiné à s'appuyer contre un ressort de soupape (12) en fonctionnement, le support de ressort (10) étant conçu pour, en fonctionnement, être tourné par le dispositif (6) de rotation de soupape par rapport au support de culasse (8),
    un joint (22) de tige de soupape étant monté sur le support de ressort (10), lequel est conçu pour s'appliquer contre une tige de soupape (56) et pour rendre celle-ci étanche lors de mouvements rotatifs et axiaux.
  7. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon la revendication 6, comprenant en outre un joint (24) conçu pour rendre étanche le support de ressort (10) contre une surface d'enveloppe d'un guide (54) de tige de soupape.
  8. Dispositif de rotation de soupape avec joint (2) de tige de soupape, comprenant un dispositif (6) de rotation de soupape, avec une coupelle de ressort (26) et une fixation (28) de tige de soupape, destiné, en fonctionnement, à être fixé à une extrémité de tige de soupape,
    le dispositif (6) de rotation de soupape étant conçu pour, en fonctionnement, faire tourner la fixation (28) de tige de soupape par rapport à la coupelle de ressort (26), un joint de tige de soupape (32) étant monté sur la fixation (28) de tige de soupape, lequel est conçu pour s'appliquer de manière étanche contre une tige de soupape (56).
  9. Dispositif de rotation de soupape selon la revendication 8,
    comprenant en outre un joint de guidage de tige de soupape (34), qui est conçu pour rendre étanche la fixation (28) de tige de soupape contre une surface d'enveloppe d'un guide (54) de tige de soupape.
  10. Dispositif de rotation de soupape avec joint (2) de tige de soupape, comprenant un dispositif (6) de rotation de soupape, avec une coupelle de ressort (26) et une fixation (28) de tige de soupape, destiné, en fonctionnement, à être fixé à une extrémité de tige de soupape,
    le dispositif (6) de rotation de soupape étant conçu pour, en fonctionnement, faire tourner la fixation (28) de tige de soupape par rapport à la coupelle de ressort (26), un joint (36) de tige de soupape étant monté sur la coupelle de ressort (26), lequel est conçu pour s'appliquer de manière étanche contre une tige de soupape (56).
  11. Dispositif de rotation de soupape selon la revendication 10,
    comprenant en outre un joint d'étanchéité (38) qui est disposé sur la coupelle de ressort (26) et qui est conçu pour rendre étanche la coupelle de ressort (26) contre une surface d'enveloppe d'un guide (54) de tige de soupape.
  12. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon l'une des revendications précédentes, dans lequel le joint (4, 22, 32, 36) de tige de soupape est pourvu d'au moins un ressort d'étanchéité (46) qui presse le joint (4, 22, 32, 36) de tige de soupape radialement vers l'intérieur contre une tige de soupape (56), et/ou le joint (18, 22, 34, 38) de guidage de tige de soupape est pourvu d'au moins un ressort d'étanchéité (46) qui presse le joint (18, 22, 34, 38) de guidage de tige de soupape radialement vers l'intérieur contre le guide de tige de soupape (56).
  13. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon l'une des revendications précédentes, le dispositif (6) de rotation de soupape comprenant une rondelle-ressort (44), des éléments de roulement (40) et des ressorts ainsi que, de préférence, au moins un palier à roulement ou à glissement.
  14. Dispositif de rotation de soupape avec joint (2) de tige de soupape selon l'une des revendications précédentes, dans lequel le support de ressort (10) présente un blocage en rotation (50) pour le ressort de soupape (12) et/ou dans lequel la coupelle de ressort (26) présente un blocage en rotation (48) pour le ressort de soupape (12).
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

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

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

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* 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
EP1939413B1 (fr) * 2006-12-29 2010-07-21 CORCOS INDUSTRIALE S.a.s. di Externa Italia S.r.l. Ensemble de soupape pour moteur à combustion interne, comprenant une soupape et un joint positionné de manière coaxiale à ladite soupape
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
US12049836B2 (en) 2024-07-30
PL4264021T3 (pl) 2024-08-26
WO2022194407A1 (fr) 2022-09-22
EP4264021A1 (fr) 2023-10-25
DE102021106307A1 (de) 2022-09-22
US20240141810A1 (en) 2024-05-02

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