EP3870814B1 - 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
EP3870814B1
EP3870814B1 EP19812758.1A EP19812758A EP3870814B1 EP 3870814 B1 EP3870814 B1 EP 3870814B1 EP 19812758 A EP19812758 A EP 19812758A EP 3870814 B1 EP3870814 B1 EP 3870814B1
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EP
European Patent Office
Prior art keywords
valve
cavity
tube
internally cooled
head
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Active
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EP19812758.1A
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German (de)
English (en)
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EP3870814A1 (fr
Inventor
Parth MISTRY
Stefan Kellermann
Guido Bayard
Jens GÄRTNER
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Federal Mogul Valvetrain GmbH
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Federal Mogul Valvetrain GmbH
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Publication of EP3870814A1 publication Critical patent/EP3870814A1/fr
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    • 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 conduction system.
  • Sodium-cooled valves should ideally be operated by so-called shaker cooling, in which heat energy absorbed by the coolant at a valve head is transported to the valve stem by a movement of the coolant, in order to be dissipated through the cooled cylinder head or its cooled valve guides .
  • shaker cooling in which heat energy absorbed by the coolant at a valve head is transported to the valve stem by a movement of the coolant, in order to be dissipated through the cooled cylinder head or its cooled valve guides .
  • shaker cooling does not always work as desired, especially if there is a gas in the cavity of the internally cooled valve in addition to the coolant, it may happen that this gas is merely compressed, and thereby the movement of the incompressible coolant in the cavity hindered because the coolant and the gas can not easily flow past each other.
  • the present invention seeks to alleviate 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 according to claim 1 is provided.
  • 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 passage terminates in a third of the transition region in the valve head, the further lies on a valve plate.
  • 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 before this transition area of the valve head terminates close to a valve bottom .
  • the end of the channel between the transition area and the valve base is the end of the channel between the transition area and the valve base.
  • the channel runs parallel to an axial direction of the valve body or of the valve.
  • the cavity and the channel can run side by side in parallel in the valve stem.
  • the compensation channel is tubular. This embodiment relates to a channel that is rectangular or polygonal or circular has cross section.
  • the compensating channel is formed by a tube that 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 employs a tube as a channel that is substantially coaxial with the cavity or valve stem. This is where the rotationally symmetrical thermal loads can have the least effect on the operation of the valve or the motor.
  • Another exemplary embodiment employs a tube as the channel that runs substantially 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 shaft, and an uneven temperature distribution in the valve shaft with resulting deformations can thus be avoided.
  • the tube runs eccentrically through the stem.
  • the tube is tapered at at least one end.
  • the bevel makes it easy to create a defined inflow or outflow opening without having to drill separate holes in the pipe.
  • the tube has an elbow or bend at at least one end.
  • the pipe can be bent by 45° to 90°, for example.
  • a bend can provide a larger area of the pipe for connection to the valve base, especially on a valve base.
  • the tube is welded at least at one end to an inside of the cavity. Friction welding, electron beam welding or laser welding as well as resistance welding can be used here.
  • the tube is crimped at least at one end to an inside of the cavity.
  • the pipe can be welded to a valve cover and inserted and welded together with the cover in a valve blank that is open toward the valve base.
  • the tube is held at least at one end with an inside of the cavity by positive locking.
  • indentations or guide pins can be provided in the end of the valve stem 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 should 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 here means 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 mostly not produced by cutting but by forming.
  • the valve is made from a cup-shaped semi-finished product, which is shaped in such a way that the bottom or a bottom widens downwards and forms a valve disk.
  • This first mold still has a substantially cylindrical cavity.
  • a wall area that lies above the ground is tapered and stretched, so that a cavity is created that has a larger diameter in the head than in a shaft.
  • the tapering which can be performed over a mandrel, further increases the length of the wall and hence the shank.
  • the cavity can be closed, for example by friction welding a valve stem end. It is also possible to close a shank 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 shank end so that the shank has a constant or uniform outer diameter after rolling together.
  • the internally cooled valve is the Valve stem and the 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.
  • a large cavity can be created in a valve head by means of several forming steps and stress-relief annealing, without the valve head having to be milled and closed with a valve cover.
  • a valve head and a cavity with a large diameter are formed by pressing and extrusion processes.
  • an upper part of the cup-shaped blank is reduced in diameter by rejuvenation, for example by stretching, cross, circular cross rolling, flat jaw cross rolling, hammering or drawing (each with or without a core) so far in diameter and thereby lengthened that a shaft is formed in several steps.
  • the taper also increases the length of the shank, while the cavity is maintained through the use of a core or mandrel.
  • the sodium coolant can then be introduced into the cavity of the one-piece valve body formed in this way from the shaft end of the compensating channel, which is still open at the top.
  • the stem can then be connected to a valve stem end by "full-on-tube” friction welding (or another welding method), thus sealing the cavity.
  • an internal combustion engine is provided with one of the internally cooled valves described above.
  • FIG. 12 shows a conventional internally cooled valve 22 having a valve stem 6 terminating at a lower end in a valve head 8 having a valve disc.
  • the valve stem 6 ends at the top end of the stem where cones attach the valve spring and where the valve is actuated.
  • a cavity 10 which is partially filled with a coolant 24 .
  • Sodium which is in a liquid state at the operating temperatures of an internal combustion engine, is usually used as the coolant 24 .
  • the coolant 24 is usually used as the coolant 24 .
  • the sodium moves up and down in the valve stem 6 or in the cavity 10 of the valve stem 6, transporting 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 in that the valve head 8 was provided with an opening on a valve head surface.
  • the cavity 10 was introduced into the valve disk 8 and the valve stem 6 through the opening.
  • 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.
  • 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 tearing off can be minimized.
  • the problem arises during operation that the liquid coolant 24 encounters a compressible gas that is located in the cavity 10 when it wants to flow from the valve head in the direction of the shaft end.
  • the long, narrow shape of the cavity 10 makes gas exchange more difficult and the sodium flows as it flows up 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 area or area of the shaft 14 and a head area or area of the valve head 12, which is also designed to be essentially cylindrical.
  • the area of the valve stem 14 is shaped prelate and has a small diameter d.
  • the valve head 14 portion is oblate shaped and has a large diameter D on. Between the area of the valve stem 14 and the area of the valve head 14 there is a transition area 18 which is funnel-shaped and tapers from the diameter D to the diameter d.
  • a coolant 24 is arranged in the cavity. The coolant 24 has been illustrated using circles for clarity.
  • FIG 2 shows a simple inventive embodiment of an internally cooled valve 2 with a compensating channel 16 in a sectional view.
  • the valve body 4 also includes 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 shank.
  • the cavity 10 is here arranged eccentrically in the shaft in order to provide space for a compensating channel 16 in the shaft.
  • the compensating channel 16 is arranged in the valve 2 and extends between the area of the valve stem 14 of the cavity 10 and into an area of the valve head 14 of the cavity 10 .
  • the channel ends near the end of the shaft and in a shoulder that extends to just before the valve base. When the valve is open, the coolant around the valve head is near the valve bottom.
  • the cavity 10 and the compensating channel 16 run essentially parallel in the valve stem 6 .
  • the compensating channel 16 opens into the cavity 10 with a stem end of the channel 44 near a stem end of the valve stem 6.
  • the compensating channel 16 opens into the cavity 10 with a head end of the compensating channel 46 in a socket in the transition region 18 or the head region 12 of the valve head 8 With the valve open or with the valves stationary, the coolant is in the cavity 10 as shown, and extends both in the cavity and in the equalizing passage 16, as shown by the circles.
  • figure 2 serves to clarify the principle of how the movement of the coolant in the valve stem can be improved, the execution of the figures 2 and 3 however, are not the first choice in terms of valve manufacture and operation.
  • Figures 3A to 3E showed in a sectional view the mode of operation of the compensation channel during a closing process.
  • the figure 2 shows the situation at the end of a closing process just before the edge of the valve disk touches down on a valve seat of a cylinder head, the coolant 24 still being collected in the head.
  • the acceleration of the coolant corresponds to a direction towards the bottom of the figure, and corresponds to the situation of a valve standing with the head on a flat surface and subject to gravity.
  • Figure 3A represents the moment when the edge of the valve disk touches down on a valve seat of a cylinder head.
  • the acceleration of the coolant corresponds to a direction towards the valve stem 6.
  • the representation corresponds to the situation of a valve that is standing with the stem end on a flat surface and is subject to gravity.
  • the coolant is still distributed in the same way as in the figure 2 , and the filling level or the filling depth of the cavity 10 and the filling level or the fluid column of the coolant in the equalizing channel 16 is essentially the same.
  • Figure 3B 14 depicts a moment after the valve disk rim has been seated on a valve seat of a cylinder head.
  • the coolant 24 has moved towards the valve stem 6 and a vacuum or low pressure area has formed above the coolant while a gas in the cavity below of the coolant is compressed by the movement.
  • the coolant fills the cavity 10 and the compensation channel 16 evenly. It could happen that the shape of the transition area causes 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, but this only increases the effect of the present arrangement.
  • valve body the valve head 8 and the valve stem 6 are made in one piece with the exception of the end 26 of the valve stem.
  • This valve body was made 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 valve head having to be milled and closed. In particular, there is no need to weaken the valve in the area of the highly stressed parts such as the valve base and valve head.
  • Such a valve can be made by forming a cup-shaped preform into a valve head with a cavity by compression and extrusion methods, with 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.
  • rejuvenating, stretch, cross, circular cross rolling, Flat die cross rolling, hammering or drawing can be used with or without a core.
  • the cup wall After the cup wall is sufficiently reduced in diameter and axially elongated, the cup wall forms a hollow valve stem.
  • a tube, which forms the compensating 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 a valve stem end through weld/spin weld 28 .
  • the Figures 4A to 5F describe in particular different versions of the tube or the compensating channel.
  • Figure 4A and 4B show the position of a compensating channel formed by a tube in a sectional view.
  • the channel formed by a tube 40 which is arranged concentrically in the valve or in the cavity 10.
  • the pipe does not show how the tube is secured within the cavity 10 as these figures only serve to define the location of the head end 46 of the tube 40 which forms the equalizing channel 16.
  • the pipe should not be able to move in the axial direction.
  • transition region 18 is shown divided into two halves by dashed lines.
  • the tube 40 forming the equalizing passage is shown terminating in the half h1/2 of the transition area closer to the valve bottom.
  • transition region 18 is shown divided into three thirds by dashed lines.
  • the tube 40 forming the equalizing channel 16 is shown terminating in the third hl/3 of the transition region which is closer to the valve bottom.
  • the area 12 of the valve head is shown above the transition area.
  • the area of the valve head 12 is formed by the upper edge of the transition area.
  • Figure 5A shows the tube 40, which forms the compensating channel 16, in a shape that is beveled on both sides.
  • the bevels of the tube 40 make it possible to keep the shank end 44 or the head end 46 of the tube 40 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 fixed in the shaft in other ways.
  • the tube can also rest against only one end of the cavity 10.
  • Guide elements that are not shown can also be used. The chamfer ensures that the shank end and the head end of the tube remain free even if the fastening of the tube 40 were to become loose and the tube lay freely in the cavity.
  • the pipe is fastened frictionally and positively by conical structures of the cavity in the shaft end and the valve base 20, transverse bores are still necessary here, which ensure that fluid can enter or exit the pipe 40.
  • the upper conical structure can be produced by a drill cone or the main cutting edges of a helical flute drill, which machines the shank end 26 before welding.
  • the conical structure on the valve base 20 can be produced during the forming of the preform.
  • the tube is held in the radial directions by positive locking and in the circumferential direction by friction locking.
  • the shape also makes it possible to fasten the tube 40 to the stem 8 and/or to the valve base 20 by friction welding, for example together with the friction welding of the valve stem end 26 to the valve stem.
  • Figures 5C and 5D Figure 12 illustrate embodiments in which the tubes 40 are slotted at their ends.
  • the tube 40 is placed directly against the wall of the cavity 10.
  • the tube is attached to the bottom of the valve base 20 by welding and may be plugged into a keyed attachment at the top. Due to the positive fit, 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 enhancing the effect according to the invention by means of a capillary effect of the coolant.
  • liquid sodium has a relatively high surface tension.
  • Capillary depression is expected due to the high surface tension. So it will be under operating conditions compared to the figure 2 and 3A to 3E form a smaller column of liquid in the tube 40, further enhancing the inventive effect.
  • the arrangement of the tube 40 at the edge of the cavity further reduces the capillary effect in the cavity.
  • the capillary effect is proportional to the inverse of the diameter.
  • Figure 5D 14 illustrates an embodiment in which the tube 40 is only slightly eccentric to reduce uneven heating of the shaft while reducing capillary effect in the cavity outside the tube 40.
  • FIG. The shaker cooling can be significantly improved here, even if a non-rotationally symmetrical valve is used overall.
  • the small distance between the tube 40 and the inner wall of the cavity on the left side allows the coolant to still be cooled through the entire inner surface of the shaft, thereby avoiding bending of the shaft due to thermal expansion.
  • FIG. 5E 1 shows a tube which is provided with an angle or a bend at a lower head end 46 facing the valve plate 20 .
  • the bend can provide a larger area for connection to the valve base 20 .
  • the upper shank end 44 of the tube 40 is provided with a chamfer.
  • the tube is also provided with centering elements 42 which can hold the tube centrally 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 is the valve of Figure 5B 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 also easily be introduced into the cavity in the form of sodium sand before or after the tube of the equalizing channel is inserted. However, it is also possible to cast the tube that forms the compensating channel into the sodium that is to form the coolant filling and to insert the tube 40 together with the sodium 24 into the shaft. This would also have the benefit of allowing the tube to be centered in the cavity by the solid sodium, thereby ensuring that the tube is aligned with the appropriate guide support members in the cavity.
  • the sodium melts and the tube can continue to be held in the valve by means of a positive fit.
  • the tube that forms the compensating channel can be inserted into the shaft and welded either at the shaft end 26 or on the inside of the valve base 20 .
  • the valve may then be closed by conventional welding techniques such as friction welding at one of the welds 28 between the valve stem 6 and the valve stem end 26 .
  • valve head 8 and the valve stem 6 are made in one piece with the exception of the valve stem end 26 .
  • This valve body was made 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 valve head having to be milled and closed. 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 rejuvenation, for example by stretching, cross, circular cross rolling, flat jaw cross rolling, hammering or drawing (each with or without a core) so far in diameter and thereby lengthened that a shaft is formed in several steps.
  • the taper also increases the length of the shank while maintaining the cavity through the use of a core or mandrel.
  • the tube 40, which forms the compensating channel, and sodium (not shown) were introduced from the still open shaft end into the cavity of the one-piece valve body formed in this way.
  • the stem was sealed to a valve stem end by "full-on-tube" friction welding.
  • the end of the shaft of the formed part can be tapered less and closed by a final forming process.
  • the end of the shaft can be pressed together in the radial direction simply by rolling in such a way that the cavity is closed.
  • FIG 6A 1 shows a tube which is provided with an angle or a bend at a lower head end 46 facing the valve plate 20 .
  • the bend can provide a larger area for connection to the valve base 20 .
  • the upper shank end 44 of the tube 40 is provided with a chamfer.
  • the tube is also provided with centering elements 42 which can hold the tube centrally 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.
  • valve whose valve body is composed of four parts.
  • the valve head includes a valve cover 20 which is inserted into the bottom of the valve base and is secured by a weld 28 .
  • the valve head 8 is connected to the valve stem 6 by a welded joint 28 .
  • the valve stem 6 is also connected to a valve end 26 by a weld joint 28 .
  • the present valve can thereby be assembled in a desired or advantageous manner by connecting the valve cover 20 to the valve base, then connecting the valve stem 6 to the valve head 8 by welding, and finally welding the valve end 26 to the valve stem 6 .
  • other orders of the welded joints are also possible.
  • valve base is preferably first inserted into the valve head and then the stem is welded to the end of the valve stem or the valve head.
  • the sodium 24 is inserted into the cavity along with the tube 40 forming the equalizing channel.
  • Figure 6B equals to Figure 5G and is modified in such a way that the weld between the valve head and the valve stem is omitted, but is arranged on the valve base.
  • the cavity 10 in the head 8 is first worked out by milling, then the shank 6 is drilled out in the longitudinal direction. It is then possible to introduce the compensation channel or the tube that forms the compensation channel and sodium as a coolant from the valve head that is still open into the cavity.
  • the cavity of such a valve blank can then be closed at the bottom by a 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)

Claims (15)

  1. Soupape à refroidissement interne (2) comprenant:
    un corps de soupape (4) comportant une tige de soupape (6) et une tête de soupape (8), dans lequel dans le corps de soupape (4) une cavité (10) s'étend depuis la tige de soupape (6) dans la tête de soupape (8),
    dans lequel la cavité (10) est partiellement remplie de sodium et fermée,
    dans lequel la cavité (10) dans la zone de la tête de soupape (12) présente un plus grand diamètre (D) que dans une zone de la tige de soupape (14), caractérisé en ce que
    un canal de compensation (16) est disposé dans la soupape (2) qui s'étend entre une zone de la tige de soupape (14) de la cavité jusqu'à une zone de la tête de soupape (14) de la cavité (10), dans lequel le gaz peut circuler dans la cavité à travers le canal de compensation et ainsi ne pas gêner le mouvement du sodium, dans lequel la cavité (10) comprend une zone de transition (18), dans laquelle le diamètre de la cavité (10) varie, et dans lequel le canal de compensation (16) en une moitié (H1/2) de la zone de transition (18) se termine dans la tête de soupape (8), qui est plus proche d'une base de soupape (20).
  2. Soupape à refroidissement interne selon la revendication 1, dans laquelle la cavité (10) comprend une zone de transition (18), dans laquelle le diamètre de la cavité (10) varie, et dans lequel le canal de compensation (16) dans un tiers de la zone de transition (18) se termine dans la tête de soupape (8), qui est plus proche d'une base de soupape (20).
  3. Soupape à refroidissement interne selon la revendication 1, dans laquelle la cavité (10) comprend une zone de transition (18), dans laquelle le diamètre de la cavité (10) varie, dans lequel le canal de compensation (16) se termine devant cette zone de transition (18) dans la tête de soupape (8) à proximité d'une plaque de soupape (20).
  4. Soupape à refroidissement interne selon une des revendications 1 à 3, caractérisée en ce que le canal de compensation (16) s'étend parallèlement à une direction axiale (A) du corps de soupape (4).
  5. Soupape à refroidissement interne selon une des revendications précédentes, caractérisée en ce que la cavité (10) est sensiblement à symétrie de révolution.
  6. Soupape à refroidissement interne selon une des revendications 1 à 5, caractérisée en ce que le canal de compensation (16) est tubulaire ou formé par un tube (4).
  7. Soupape à refroidissement interne selon la revendication 6, caractérisée en ce que le tube (40) s'étend essentiellement coaxialement à la cavité (10) ou à la tige de soupape (6).
  8. Soupape à refroidissement interne selon la revendication 6 ou 7, caractérisée en ce que le tube (40) s'étend sensiblement sur le bord de la cavité (10) .
  9. Soupape à refroidissement interne selon une des revendications 6 à 8, caractérisée en ce que le tube (40) est biseauté à au moins une extrémité.
  10. Soupape à refroidissement interne selon une des revendications 6 à 9, caractérisée en ce que le tube (40) présente un angle à au moins une extrémité ou est soudé au moins une extrémité à un côté intérieur de la cavité (10).
  11. Soupape à refroidissement interne selon une des revendications 6 à 10, caractérisée en ce que le tube (40) à au moins une extrémité est coincé ou maintenu en place par un ajustement positif avec un côté intérieur de la cavité (10).
  12. Soupape à refroidissement interne selon une quelconque des revendications 6 à 11, caractérisée en ce que sur le tube (40) sont disposés des éléments de centrage (42) qui maintiennent le tube (40) coaxialement à la cavité (10).
  13. Soupape à refroidissement interne selon une des revendications précédentes, caractérisée en ce que la tige de soupape (6) et la tête de soupape (8) sont réalisées en un seul tenant.
  14. Soupape à refroidissement interne selon une quelconque des revendications précédentes, caractérisée en ce que la tige de soupape (6), la tête de soupape (8) et la base de soupape sont formées d'une seule pièce en métal, dans lequel la cavité (10) est fermée par une extrémité de tige de soupape (26) qui est soudée à la tige de soupape (6).
  15. Moteur à combustion interne comportant une soupape à refroidissement interne selon une des revendications précédentes 1 à 14.
EP19812758.1A 2019-02-25 2019-11-27 Soupape à refroidissement intérieur avec un système de guidage de réfrigérant Active EP3870814B1 (fr)

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DE102019104659.9A DE102019104659A1 (de) 2019-02-25 2019-02-25 Innengekühltes Ventil mit Kühlmittelleitsystem
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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CN112719201B (zh) * 2020-12-02 2022-09-23 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
DE2313339A1 (de) * 1973-03-17 1974-09-19 Maschf Augsburg Nuernberg Ag Ventil, insbesondere auslassventil fuer brennkraftmaschinen
CH571154A5 (fr) * 1973-10-31 1975-12-31 Sulzer Ag
DE3223920A1 (de) * 1982-06-26 1983-12-29 Gesenkschmiede Schneider Gmbh, 7080 Aalen Hohlgeschmiedetes gekuehltes ventil fuer verbrennungsmotoren
DE4313591A1 (de) * 1993-04-26 1994-10-27 Bongers Hermann Verbrennungsmotor mit integrierter Kolbenkühlung
DE102010051871A1 (de) * 2010-11-22 2012-05-24 Märkisches Werk GmbH Verfahren zur Herstellung von Ventilen für den Gasaustausch und nach einem derartigen Verfahren hergestellte Ventile
WO2018153428A1 (fr) * 2017-02-21 2018-08-30 Federal-Mogul Valvetrain Gmbh Soupape champignon à refroidissement interne pour moteur à combustion interne

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