WO2020173587A1 - Soupape à refroidissement intérieur avec un système de guidage de réfrigérant - Google Patents

Soupape à refroidissement intérieur avec un système de guidage de réfrigérant Download PDF

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Publication number
WO2020173587A1
WO2020173587A1 PCT/EP2019/082687 EP2019082687W WO2020173587A1 WO 2020173587 A1 WO2020173587 A1 WO 2020173587A1 EP 2019082687 W EP2019082687 W EP 2019082687W WO 2020173587 A1 WO2020173587 A1 WO 2020173587A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
cavity
tube
internally cooled
head
Prior art date
Application number
PCT/EP2019/082687
Other languages
German (de)
English (en)
Inventor
Parth MISTRY
Stefan Kellermann
Guido Bayard
Jens GÄRTNER
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
Priority to EP19812758.1A priority Critical patent/EP3870814B1/fr
Publication of WO2020173587A1 publication Critical patent/WO2020173587A1/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
    • 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
    • F01L3/12—Cooling of valves
    • F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • F01P2003/2278—Heat pipes

Definitions

  • the present invention relates to an internally cooled valve with a coolant control system.
  • Sodium-cooled valves should ideally be operated by what is known as shaker cooling, in which heat energy that is absorbed by the coolant at a valve head is transported to the valve stem by a movement of the coolant in order to be diverted through the cooled cylinder head or its cooled valve guides .
  • the shaker cooling does not always work as desired, however, especially if there is a gas in the cavity of the internally cooled valve in addition to the coolant, it can happen that this gas is only compressed, and thereby the movement of the incompressible coolant in the cavity hindered, since the coolant and the gas can not easily flow past each other.
  • a simple solution is to fill and close the valve under vacuum conditions, but this is very complex and expensive. It is therefore preferred to use a protective gas instead of a vacuum when filling the cavity, since a gas also reduces the load on the valve.
  • the present invention seeks to reduce this problem, or to avoid or at least reduce the effects emanating from a compressible gas in the cavity next to the coolant itself.
  • an internally cooled valve with a coolant control system comprises a valve body with a valve stem and a valve head.
  • the valve body In the valve body there is a cavity which extends from the valve stem into the valve head.
  • the cavity has a larger diameter in the radial direction in the area of the valve head than in an area of the valve stem.
  • a compensation channel is arranged in the cavity, which extends between a valve stem end of the cavity into a valve head end of the cavity.
  • the cavity has a transition area in which the diameter of the cavity tapers from a largest diameter in the valve head to a smaller diameter in the valve stem, and the channel ends in one half of the transition area in the valve head, which continues lies on a valve base.
  • the cavity has a transition area in which the diameter of the cavity tapers from a largest diameter in the valve head to a smaller diameter in the valve stem, and the channel ends in a third of the transition area in the valve head, which further lies on a valve base.
  • the cavity has a transition region in which the diameter of the cavity tapers from a largest diameter in the valve head to a smaller diameter in the valve stem, and the channel ends in front of this transition region of the valve head close to a valve base .
  • the end of the channel lies between the transition area and the valve base.
  • the channel runs parallel to an axial direction of the valve body or the valve.
  • the cavity and the channel can run parallel to one another in the valve stem.
  • the compensation channel is tubular. This design concerns a channel that is rectangular or polygonal or circular Has cross section.
  • the compensation channel is formed by a tube which is arranged in the cavity.
  • the tube runs through the cavity and through the stem of the valve and is open at both ends to the cavity.
  • the cavity is essentially rotationally symmetrical. In another embodiment, the entire valve or at least the valve body is rotationally symmetrical.
  • Another exemplary embodiment uses a tube as a channel which runs essentially coaxially to the cavity or to the valve stem.
  • the rotationally symmetrical thermal loads can have the least effect on the operation of the valve or the motor.
  • Another exemplary embodiment uses a tube as a channel which runs essentially at or near the edge of the cavity. Capillary forces can have a stronger effect here, which only occur with the coolant but not with the remaining gas in the cavity.
  • the tube is preferably arranged close to the edge, so that the coolant can also flow between the tube and the stem and an uneven temperature distribution in the valve stem with the resulting deformations can thus be avoided.
  • the tube runs eccentrically through the shaft.
  • the tube is beveled at at least one end.
  • the bevel makes it possible to easily generate a defined inflow or outflow opening without having to make separate bores on the pipe.
  • the tube has an angle or an angle piece or a bend at at least one end.
  • the tube can be designed bent by 45 ° to 90 °, for example. By means of a bend, a larger area of the pipe can be provided for connection to the valve base, especially on a valve base.
  • the tube is welded to an inside of the cavity at at least one end. Friction welding, electron beam welding or laser welding as well as resistance welding can be used here. In an additional embodiment, the tube is clamped at least at one end to an inside of the cavity. There should be a frictional connection here in order to hold the pipe in the axial direction or in the radial direction.
  • the pipe can be welded to a valve cover and inserted and welded together with the cover in a valve blank open towards the valve base.
  • the tube is held at least at one end with an inside of the cavity by a form fit.
  • recesses or guide pins can be provided in the valve stem end and / or on the valve base, which hold and fix the tube in the cavity.
  • radially extending centering elements are arranged on the tube, which hold the tube coaxially to the cavity. These centering elements are intended to reduce a gap between the tube and an inner surface of the cavity as little as possible.
  • the valve stem and the valve head are made in one piece.
  • One-piece means here that there is no weld seam between the valve stem and the valve head, and the valve head also has no weld seam.
  • the valve is for the most part not produced by machining but by forming.
  • the valve is produced from a cup-shaped semi-finished product which is reshaped in such a way that the or a base widens downwards and forms a valve disk. This first shape also has an essentially cylindrical cavity.
  • a wall area that lies above the floor is tapered and stretched more and more, so that a cavity is created that has a larger diameter in the head than in a shaft.
  • the tapering which can be carried out over a dome, further increases the length of the wall and thus of the shaft.
  • the cavity can be closed, for example by attaching a valve stem end by friction welding. It is also possible to close a shaft end that is open in the axial direction by rolling it together, with a section with an increased wall thickness preferably being present at the shaft end so that the shaft has a constant or uniform outer diameter after rolling together.
  • the internally cooled valve is the Valve stem and valve head with the valve base formed from one piece of metal.
  • the cavity is closed by a valve stem end which is connected to the valve stem by welding, preferably friction welding.
  • the valve body is made from a cylindrical or cup-shaped semi-finished product by drop forging, deep drawing and tapering. With several forming steps and stress-relieving annealing, a large cavity can be created in a valve head without the need for milling and closing the valve head with a valve cover. For this purpose, starting from a cup-shaped preform, a valve head and a cavity with a large diameter are formed by pressing and extrusion processes.
  • an upper part of the cup-shaped molding is reduced in diameter by tapering, for example by stretching, transverse, round transverse rolling, flat-jaw transverse rolling, hammering or pulling (each with or without a core) and lengthened so that a shaft is created in several steps .
  • the taper also increases the length of the shaft, while the cavity is retained by using a core or dome.
  • the coolant sodium can then be introduced into the cavity of the one-piece valve body formed in this way from the shaft end of the compensating duct which is still open at the top.
  • the stem can then be connected to a valve stem end by “full-on-pipe” friction welding (or another welding process), thus closing the cavity.
  • an internal combustion engine is provided with one of the internally cooled valves described above.
  • Figure 1 is a sectional view of a conventional internally cooled valve.
  • FIG. 2 shows an internally cooled valve according to the invention with a compensating duct in a sectional view.
  • FIGS. 3A to 3E show in a sectional view the mode of operation of the compensation channel during a closing process.
  • FIGS. 4A and 4B show the position of a compensation channel formed by a pipe in a sectional view.
  • Figures 5A to 5G show possible fastenings and arrangements of equalizing duct tubes in the cavity.
  • Figures 6A and 6B show embodiments of valves with a different structure of the valve body
  • FIG. 1 shows a conventional internally cooled valve 22 with a valve stem 6 which ends at a lower end in a valve head 8 with a valve disk.
  • the valve stem 6 ends at the top of the shaft to which the cone pieces attach the valve spring and to which the valve is controlled.
  • the valve 22 is provided with a cavity 10 which is partially filled with a coolant 24.
  • Sodium which is present in a liquid state at operating temperatures of an internal combustion engine, is usually used as the coolant 24.
  • the coolant 24 usually not the entire cavity but only 1/2 to 3/4 of the cavity of the valve is filled with sodium. It is also possible to fill only 1/4 or 1/3 of the cavity of the valve with sodium.
  • the sodium moves up and down in the valve stem 6 or in the cavity 10 of the valve stem 6 and transports heat from the valve head 8 in the direction of the cooled valve stem 6.
  • the sodium moves within the valve with each opening or closing process 22.
  • the cavity 10 was created in the valve 22 by providing the valve head 8 with an opening on a valve disk surface.
  • the cavity 10 was introduced into the valve disk 8 and the valve stem 6 through the opening.
  • the coolant 24 here sodium
  • the opening was closed by a valve base or valve base cover 20.
  • the base 20 or cover was joined to the valve disk by laser welding, electron beam welding, resistance welding or friction welding.
  • the rear side of the valve head 8, which ends at the valve stem 6, has no joints in this embodiment, and the valve head can be manufactured in one piece with the valve stem 6, so that the risk of a valve disk or valve head being torn off can be minimized.
  • the problem arises during operation that the liquid coolant 24, when it wants to flow from the valve head in the direction of the worker, encounters a compressible gas which is located in the cavity 10.
  • the long, narrow shape of the cavity 10 makes gas exchange more difficult and the sodium flows as it flows upwards like against an elastic spring which counteracts the movement of the coolant and thus the desired “shaker cooling”.
  • the cavity is divided here into an essentially cylindrical shaft region or region of the shaft 14 and a head region or region of the valve head 12, which is also essentially cylindrical.
  • the area of the valve stem 14 is prelate and has a small diameter d.
  • the area of the valve head 14 is oblate and has a large diameter D.
  • a coolant 24 is arranged in the cavity. The coolant 24 has been illustrated using circles.
  • FIG. 2 shows a simple embodiment according to the invention of an internally cooled valve 2 with a compensating channel 16 in a sectional view.
  • the valve body 4 here also comprises a valve stem 6 and a valve head 8 and is provided with a cavity 10 which extends almost through the entire valve.
  • the cavity 10 is wider in the head and narrower in the shaft.
  • the cavity 10 is here arranged eccentrically in the shaft in order to provide space for a compensating channel 16 in the shaft.
  • the compensation channel 16 is arranged in the valve 2 and extends between the area of the valve stem 14 of the cavity 10 as far as an area of the valve head 14 of the cavity 10.
  • the channel opens near the worker and in an approach that extends to just before the valve base. When the valve is open, the coolant is around the valve head near the valve base.
  • the cavity 10 and the compensation channel 16 run essentially parallel in the valve stem 6.
  • the compensation channel 16 opens with a shaft end of the channel 44 near a shaft end of the valve stem 6 into the cavity 10.
  • the compensation channel 16 opens with a head end of the compensation channel 46 in a socket in the transition area 18 or the head area 12 of the valve head 8 in the cavity 10
  • the coolant is located in the cavity 10, as shown, and extends both in the cavity and in the equalizing channel 16, as is shown by the circles.
  • FIG. 2 serves to clarify the principle of how the movement of the coolant in the valve stem can be improved, but the designs in FIGS. 2 and 3 are not the first choice with regard to manufacture and operation of the valve.
  • FIGS. 3A to 3E show in a sectional view the mode of operation of the compensation channel during a closing process.
  • FIG. 2 shows the situation at the end of a closing process shortly before the valve disk edge is placed on a valve seat of a cylinder head, with the coolant 24 still present in the head.
  • the acceleration of the coolant corresponds to a direction towards the lower edge of the figure, and corresponds to the situation of a valve that stands with the plate on a flat surface and is subject to gravity.
  • FIG. 3A shows the moment when the edge of the valve disk is placed on a valve seat of a cylinder head.
  • the acceleration of the coolant corresponds to a direction towards the valve stem 6.
  • the illustration corresponds to the situation of a valve with the end of the valve standing on a flat surface and subjected to gravity.
  • the coolant is still distributed exactly as in FIG. 2, and the fill level or the fill depth of the cavity 10 and the fill level or the fluid column of the coolant in the compensation channel 16 is essentially the same.
  • FIG. 3B shows a moment after the valve disk edge has been placed on a valve seat of a cylinder head.
  • the coolant 24 has moved in the direction of the valve stem 6, and a vacuum or an area with low pressure has formed above the coolant, while a gas has formed in the
  • the cavity below the coolant is compressed by the movement.
  • the coolant fills the cavity 10 and the equalization channel 16 evenly. It could happen that the shape of the transition area results in a nozzle effect that accelerates the coolant 24 in the cavity 10 and thus creates a larger coolant column in the cavity 10 than in the equalization channel 16, which, however, only increases the effect of the present arrangement.
  • the neck or stub of the head end 46 of the compensation channel has broken through the surface of the coolant 24, and no further coolant 24 flows into the compensation channel 16. Since the compensation channel has a constant diameter, the height of the liquid column does not change from here on more. Further coolant 24 is moved into the shaft through the transition section and the funnel shape increases the coolant Liquid column in the cavity 10 continues, while a compressible gas is further compressed in the cavity 10 in the shaft.
  • the reduction in the diameter in the transition region 18 of the cavity 10 increases the height of the fluid column hH in the cavity 10, while the height of the fluid column hA in the compensation channel 16 does not increase any further.
  • the pressure within the compressible gas in the shaft area of the cavity is determined by the height of the fluid column hH and the acceleration and the density of the coolant. As long as both fluid columns hH and hA are of the same height, they contribute in the same way to the compression of the gas in the shaft.
  • the pressure on the gas is dominated by the fluid column hH in the cavity. Since the cavity below the fluid columns is in communication, the pressure that the gas exerts on the two fluid columns will continue to increase.
  • FIG. 3D the pressure within the compressible gas in the shaft area of the cavity is determined by the height of the fluid column hH and the acceleration and the density of the coolant. As long as both fluid columns hH and hA are of the same height, they contribute in the same way to the compression of the gas in the shaft.
  • the pressure in the gas has increased due to the increasing height of the fluid column hH in the cavity so that it has pushed the smaller fluid column hA in the equalization channel 16 up through the head end of the equalization channel into the head or transition area.
  • the compressed gas can flow out of the shaft again into the head area and the transition area and thus relax.
  • the coolant can continue to flow into the cavity as far as the end of the shaft without being hindered by the compressed gas.
  • the geometry of the cavity together with the compensation channel can prevent a compressible gas in the cavity from hindering the movement of a coolant 24.
  • FIGS. 4A to 5F are provided with a valve body, the valve head 8 and the valve stem 6 of which, with the exception of the valve stem end 26, are made in one piece.
  • This valve body was produced from a cup-shaped semi-finished product by deep drawing and tapering and allows a large cavity to be created in a valve head through several forming steps without the need for milling and closing the valve head.
  • a weakening of the valve in the area of the highly stressed parts such as the valve base and valve head can be dispensed with.
  • Such a valve can be produced in that a cup-shaped preform is formed into a valve head with a cavity by pressing and extrusion processes, a wall of the cup later forming the valve stem.
  • an upper part of the cup-shaped molding in particular the wall of the cup, is tapered and lengthened.
  • tapering stretching, transverse, round transverse rollers, Flat jaw cross rolling, hammering or pulling, each with or without a core, are used.
  • a tube which forms the compensation channel and the coolant, can be inserted from the open end of the shaft into the hollow valve stem formed in this way.
  • the cavity can then be closed by welding on a valve stem end by welding / friction welding seam 28.
  • Figures 4A to 5F describe in particular different designs of the pipe or the equalization channel.
  • FIGS. 4A and 4B show the position of an equalizing channel formed by a pipe in a sectional view.
  • the channel is formed by a tube 40 which is arranged concentrically in the valve or in the cavity 10.
  • FIGS. 4A and 4B do not show how the pipe is fastened in the cavity 10, since these figures only serve to define the position of the head end 46 of the pipe 40 which forms the compensating channel 16.
  • the tube should not be able to move in the axial direction.
  • the transition region 18 is shown divided into two halves by dashed lines.
  • the tube 40 which forms the compensation channel, is shown in such a way that it ends in half hl / 2 of the transition area which is closer to the valve base.
  • the transition area 18 is shown divided into three thirds by dashed lines.
  • the tube 40 which forms the compensation channel 16, is shown in such a way that it ends in the third hl / 3 of the transition area that is closer to the valve base.
  • FIG. 4A the area 12 of the valve head is shown above the transition area.
  • FIG. 4B the area of the valve head 12 is formed by the upper edge of the transition area.
  • FIGS. 5A to 5E possible fastenings and arrangements of equalizing duct tubes in the cavity are shown. The coolant was not shown in FIGS. 5A to 5E.
  • FIG. 5A shows the pipe 40 which forms the compensation channel 16 in one on both sides
  • the bevels of the tube 40 allow the shaft end 44 or the head end 46 of the tube 40 to be kept open in a simple manner.
  • the head end 46 of the tube 40 can be welded to the valve base 20.
  • the tube can also be attached to the shaft in other ways.
  • the tube can also rest against one end of the cavity 10. It can also not be shown
  • the bevel ensures that the shaft end and the head end of the tube remain free even if the
  • Fixing of the tube 40 should loosen and the tube is exposed in the cavity.
  • the tube is frictionally and positively fastened by conical structures of the cavity in the shaft end and the valve base 20; here, transverse bores are still necessary to ensure fluid entry and exit into the tube 40.
  • the upper conical structure can be through a drill cone or the main cutting edge of a
  • Groove drill produced, which machined the shank end 26 before welding.
  • the conical structure on the valve base 20 can be produced when the preform is reshaped.
  • the pipe is in the radial directions by form fit and in
  • the equalizing channel 16 or the pipe ends in front of the transition area 18 in the valve head 8 close to a valve base 20.
  • FIG. 5C and 5D illustrate embodiments in which the tubes 40 are slotted at their ends.
  • the tube 40 is arranged directly on the wall of the cavity 10.
  • the tube is attached to the bottom of the valve base 20 by welding and can be inserted into a form-fitting attachment at the top.
  • the tube 40 can expand and contract in the longitudinal direction.
  • the tube 40 reduces a uniform distribution of the coolant in the circumferential direction, but this has little or no effect due to the small dimensions of the tube.
  • This embodiment is aimed at further intensifying the effect according to the invention through a capillary action of the coolant.
  • Liquid sodium like mercury and steel, has a relatively high surface tension. The high surface tension creates a
  • FIG. 5D shows an embodiment in which the tube 40 is arranged only slightly eccentrically in order to reduce uneven heating of the shaft and at the same time the
  • Shaker cooling can be improved significantly, even if not overall
  • FIG. 5E shows a tube which is provided with an angle or a bend on a lower head end 46 facing the valve base 20. As a result of the bend, a larger area can be provided for connection to the valve base 20.
  • the upper shaft end 44 of the tube 40 is provided with a bevel.
  • the pipe is also provided with centering elements 42 which can hold the pipe in the middle or slightly offset in the cavity of the valve.
  • the tube 40 can simply be inserted into the cavity from the shaft end and fixed in the cavity 10 by frictional engagement.
  • FIG. 5F the valve from FIG. 5B is shown, which is additionally filled with a coolant.
  • the sodium is inserted into the cavity 10 together with the tube 40 which forms the compensation channel. Since the sodium is in a solid state at room temperature, it can easily be introduced into the cavity in the form of sodium sand before or after the pipe of the equalization duct is inserted. However, it is also possible to use the pipe
  • Compensating channel forms into which sodium is to form the coolant filling
  • Form fit are kept in the valve.
  • This valve body was produced from a cup-shaped semi-finished product by deep drawing and tapering and allows a large cavity to be created in a valve head through several forming steps without the need for milling and closing the valve head. For this purpose, starting from a cup-shaped preform by pressing and
  • F 1 extrusion process a valve head and a cavity formed with a large diameter.
  • an upper part of the cup-shaped molding is reduced in diameter by tapering, for example by stretching, transverse, round transverse rolling, flat-jaw transverse rolling, hammering or pulling (each with or without a core) and lengthened so that a shaft is created in several steps.
  • the taper also increases the length of the shaft while maintaining the cavity by using a core or mandrel.
  • valve body The valve body, the pipe 40 that forms the compensation channel and sodium (not shown) was introduced by the still open worker.
  • the stem was sealed with a valve stem end by "full-on-pipe” friction welding. It should turn out that the friction weld is creating in some way
  • the creator of the molding can be tapered less sharply, and can be closed by a final forming process.
  • the creator of the molding can be tapered less sharply, and can be closed by a final forming process.
  • FIG. 6A shows a pipe which is provided with an angle or a bend at a lower head end 46 facing the valve base 20. As a result of the bend, a larger area can be provided for connection to the valve base 20.
  • the upper shaft end 44 of the tube 40 is provided with a bevel.
  • the tube is also provided with centering elements 42 which can hold the tube in the center or slightly offset in the cavity of the valve.
  • the tube 40 can simply be inserted into the cavity from below and fixed in the cavity 10 by frictional engagement.
  • a valve is shown, the valve body of four parts
  • the valve head comprises a valve cover 20 of the bottom in the
  • Valve bottom is inserted and is fastened by a weld 28.
  • the valve head 8 is connected to the valve stem 6 by a welded connection 28.
  • the valve stem 6 is also connected to a valve end 26 by a welded connection 28.
  • the present valve can be used in a desired or advantageous manner
  • valve cover 20 is connected to the valve base, then the valve stem 6 is connected to the valve head 8 by welding, and finally the valve end 26 is welded to the valve stem 6.
  • the valve base is first inserted into the valve head, and then the stem is welded to the valve stem end or the valve head.
  • the last one is first inserted into the valve head, and then the stem is welded to the valve stem end or the valve head.
  • FIG. 6B corresponds to FIG. 5G and has been modified to the effect that the weld seam between the valve head and the valve stem is omitted, but rather on the
  • Valve bottom is arranged.
  • the cavity 10 in the head 8 is first worked out by milling, then the shaft 6 is drilled out in the longitudinal direction. Subsequently it is possible to use the compensation channel or the pipe that forms the compensation channel and sodium as
  • valve cover 20 which is attached to the valve base by a “top of head” weld.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lift Valve (AREA)

Abstract

La présente invention concerne une soupape à refroidissement intérieur (2) comprenant un corps de soupape (4) qui comprend une tige de soupape (6) et une tête de soupape (8), une cavité (10) s'étendant dans le corps de soupape (4) depuis la tige de soupape (6) jusque dans la tête de soupape (8), laquelle cavité présente dans la région de la tête de soupape (12) un plus grand diamètre (D) que dans une région de la tige de soupape (14), un canal d'équilibrage (16) étant disposé dans la soupape (2), lequel s'étend entre la région de la tige de soupape (14) de la cavité jusque dans une région de la tête de soupape (14) de la cavité (10).
PCT/EP2019/082687 2019-02-25 2019-11-27 Soupape à refroidissement intérieur avec un système de guidage de réfrigérant WO2020173587A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19812758.1A EP3870814B1 (fr) 2019-02-25 2019-11-27 Soupape à refroidissement intérieur avec un système de guidage de réfrigérant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019104659.9A DE102019104659A1 (de) 2019-02-25 2019-02-25 Innengekühltes Ventil mit Kühlmittelleitsystem
DE102019104659.9 2019-02-25

Publications (1)

Publication Number Publication Date
WO2020173587A1 true WO2020173587A1 (fr) 2020-09-03

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PCT/EP2019/082687 WO2020173587A1 (fr) 2019-02-25 2019-11-27 Soupape à refroidissement intérieur avec un système de guidage de réfrigérant

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EP (1) EP3870814B1 (fr)
DE (1) DE102019104659A1 (fr)
WO (1) WO2020173587A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN112719201A (zh) * 2020-12-02 2021-04-30 浙江欧伦泰防火设备有限公司 一种阀门锻压工艺

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FR405100A (fr) * 1909-02-23 1909-12-18 Theodore Julius Koven Système de refroidissement pour soupapes d'échappement des moteurs à explosion
US1846800A (en) * 1930-03-28 1932-02-23 Masterbilt Motor Company Internal air cooled exhaust valve
FR1418078A (fr) * 1964-07-31 1965-11-19 Semt Soupape refroidie de machine ou analogue et ses diverses applications
DE2240572A1 (de) * 1972-08-18 1974-02-28 Maschf Augsburg Nuernberg Ag Mit waermeleitfluessigkeit gefuelltes ventil
DE2251755A1 (de) * 1972-10-21 1974-05-02 Porsche Ag Einrichtung zur kuehlung eines ventils fuer brennkraftmaschinen
DE2355292B1 (de) * 1973-10-31 1975-01-02 Sulzer Ag Gekuehltes Tellerventil einer Kolbenbrennkraftmaschine

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