EP3049645B1 - Dispositif de réglage de jeu et procédé de fabrication de ce dernier - Google Patents

Dispositif de réglage de jeu et procédé de fabrication de ce dernier Download PDF

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Publication number
EP3049645B1
EP3049645B1 EP14849857.9A EP14849857A EP3049645B1 EP 3049645 B1 EP3049645 B1 EP 3049645B1 EP 14849857 A EP14849857 A EP 14849857A EP 3049645 B1 EP3049645 B1 EP 3049645B1
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EP
European Patent Office
Prior art keywords
lash adjuster
wear resistant
cylindrical surface
surface layer
adjuster body
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
Application number
EP14849857.9A
Other languages
German (de)
English (en)
Other versions
EP3049645A1 (fr
EP3049645A4 (fr
Inventor
Prasanna Kumar GUDALOOR
John Page Chapman
Gary Lynn JANOWIAK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Intelligent Power Ltd
Original Assignee
Eaton Corp
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 Eaton Corp filed Critical Eaton Corp
Priority claimed from PCT/US2014/057760 external-priority patent/WO2015048475A1/fr
Publication of EP3049645A1 publication Critical patent/EP3049645A1/fr
Publication of EP3049645A4 publication Critical patent/EP3049645A4/fr
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Publication of EP3049645B1 publication Critical patent/EP3049645B1/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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/12—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the present disclosure is directed to a hydraulic or mechanical lash adjuster and a method of manufacturing the same.
  • Hydraulic or mechanical lash adjusters for internal combustion engines have been in use for many years to eliminate clearance or lash between engine valve train components under varying operating conditions. Lash adjusters can maintain efficiency and reduce noise and wear in the valve train. In some examples, hydraulic lash adjusters can support the transfer of energy from the valve-actuating cam to the valves through hydraulic fluid trapped in a pressure chamber under the plunger.
  • the invention relates to a method of manufacturing a lash adjuster assembly according to claim 1.
  • forming can be further defined as forming a lash adjuster body with one of cold forming, stamping, drawing, metal injection molding, powdered metal sintering, and machining.
  • Forming can be further defined as cold-forming the lash adjuster body to the as-formed condition having functional geometry.
  • the preserving can then be further defined as preserving the functional geometry of the leak down portion in the as-formed condition during imparting of the wear resistant surface layer.
  • the preserving can be further defined as preserving the functional geometry of the leak down portion in the as-formed condition after imparting of the wear resistant surface layer.
  • imparting can be further defined as imparting a wear resistant surface layer to at least the leak down portion of the inner cylindrical surface with a sub-critical temperature process selected from one of ferritic nitrocarburizing, physical vapor deposition, and chemical vapor deposition.
  • the method can also include maintaining a hardness of the lash adjuster body below the wear resistant surface layer after forming and during imparting.
  • Preserving can further comprise preserving the leak down portion of the inner cylindrical surface in the as-formed condition after imparting of the wear resistant surface layer.
  • Preserving can further comprise preserving a majority of the inner cylindrical surface in the as-formed condition after imparting of the wear resistant surface layer.
  • Preserving can further comprise preserving a majority of the outer cylindrical surface in the as-formed condition after imparting of the wear resistant surface layer. Preserving can further comprise preserving a majority of both of the outer cylindrical surface and the inner cylindrical surface in the as-formed condition after imparting of the wear resistant surface layer.
  • the method can also include annealing the lash adjuster body before imparting to relieve stresses arising during forming.
  • the method can also include cleaning the lash adjuster body after imparting and polishing the lash adjuster body after imparting.
  • a lash adjuster body for use in a lash adjuster assembly can include an outer cylindrical surface and an inner cylindrical surface.
  • the inner cylindrical surface can have a leak down portion and a blind bore.
  • At least the leak down portion of the inner cylindrical surface can include a wear resistant surface layer imparted with a sub-critical temperature process.
  • the leak down portion can be preserved in an as-formed condition existing prior to the imparting of the wear resistant surface layer.
  • the majority of the at least one of the outer cylindrical surface and the inner cylindrical surface can be modified through the sub-critical temperature process being one of ferritic nitrocarburizing, physical vapor deposition, and chemical vapor deposition.
  • the inner cylindrical surface can further comprise a plunger shelf and a notch. The notch can be positioned between the leak down portion and the plunger shelf.
  • a lash adjuster assembly can include a lash adjuster body and a leak down plunger.
  • the lash adjuster body can include an outer cylindrical surface and an inner cylindrical surface.
  • the inner cylindrical surface can include a leak down portion and a blind bore.
  • At least the leak down portion of the inner cylindrical surface can include a wear resistant surface layer imparted with a sub-critical temperature process.
  • the leak down portion can be preserved in an as-formed condition existing prior to the imparting of the wear resistant surface layer.
  • the leak down plunger can be slidably received in the inner cylindrical surface against the leak down portion.
  • a majority of the outer cylindrical surface and a majority of the inner cylindrical surface include the wear resistant surface layer.
  • the majorities of the outer and inner cylindrical surfaces can be preserved in the as-formed condition existing prior to the imparting of the wear resistant surface layer.
  • a majority of the inner cylindrical surface can include the wear resistant surface layer and a functional geometry of the majority of the inner cylindrical surface can be maintained in the as-formed condition existing prior to the imparting of the wear resistant surface layer.
  • the wear resistant surface layer can have a depth of less than forty microns.
  • FIG. 1 A plurality of different embodiments of the present disclosure is shown in the Figures of the application. Similar features are shown in the various embodiments of the present disclosure. Similar features have been numbered with a common reference numeral and have been differentiated by an alphabetic suffix. Similar features across different embodiments have been numbered with a common reference numeral and have been differentiated by an alphabetic suffix. Also, to enhance consistency, the structures in any particular drawing share the same alphabetic suffix even if a particular feature is shown in less than all embodiments. Similar features are structured similarly, operate similarly, and/or have the same function unless otherwise indicated by the drawings or this specification.
  • a method of manufacturing a lash adjuster body for use in a lash adjuster assembly can start at 100.
  • a lash adjuster body can be formed to an as-formed condition.
  • the as-formed condition can be defined as the lash adjuster body having functional geometry at the completion of 102.
  • Functional geometry refers to the fact the lash adjuster body can be operable to perform upon being formed without further processing that would alter the geometry of the lash adjuster body.
  • the lash adjuster body 20 can be formed using established metal forming and/or machining techniques with or without thermal input. Such technique could include cold-forming or cold-forging or cold-heading, deep-drawing cold formed in one or more embodiments of the present disclosure.
  • Cold forming can be a relatively high-speed manufacturing process whereby metal is shaped at relatively lower temperatures. A cold-formed workpiece is not necessarily heated, but can increase in temperature during the cold forming process. Cold forming can be carried out without removing material from a workpiece. Metal can be forced beyond the elastic yield limit but below tensile strength.
  • the term "cold-forming” and its derivatives are intended to encompass what is known in the art as “cold-forging”, “cold heading” and “deep drawing”.
  • the lash adjuster body blank can be precision cold formed, wherein workpiece dimensions can be held to within microns.
  • the lash adjuster body blank can be formed with stamping, drawing, metal injection molding, powdered metal sintering, or machining.
  • the lash adjuster body 20 can have an outer cylindrical surface 32 and an inner cylindrical surface 33.
  • the inner cylindrical surface 33 can include a leak down portion 34 and a blind bore 40.
  • the lash adjuster body 20 can be manufactured such that a majority of at least one of the outer cylindrical surface 32 and the inner cylindrical surface 33 is maintained in an as-formed condition.
  • An unground condition can define one example of an as-formed condition.
  • neither of the surfaces 32, 34 may be subjected to grinding in one or more embodiments of the present disclosure.
  • grinding and machining are distinct subsets of metal removal generally. Grinding is a microscopic cutting operation and machining is a macroscopic cutting operation.
  • At least one of the surfaces 32, 34 is not subjected to grinding in one or more embodiments of the present disclosure.
  • the outer cylindrical surface 32 must be ground as well since the lash adjuster body 20 will be held by the outer cylindrical surface 32 during grinding of the inner cylindrical surface 33.
  • the exemplary lash adjuster body 20 of the present disclosure is thus not over-processed.
  • the lash adjuster body can be annealed at 104 in one or more embodiments of the present disclosure to reduce residual stresses. Processes for relieving stress alternative to annealing can be applied in some embodiments of the present disclosure.
  • material can be machined from the lash adjuster body.
  • a lash adjuster body can be machined by defining an aperture or by turning a groove in the outer cylindrical surface of the lash adjuster body, and by metal removal to qualify overall length.
  • machining can mean the use of a chucking machine, drilling machine, turning machine, or broaching machine to remove material.
  • a wear resistant surface layer can be imparted to at least a portion of the lash adjuster body.
  • the wear resistance of the portion of the lash adjuster body can be enhanced by 108.
  • the wear resistant surface layer can be imparted to the outer cylindrical surface 32 and the inner cylindrical surface 33 in one or more embodiments of the present disclosure.
  • the outer cylindrical surface 32 may or may not be imparted with a wear resistant surface layer.
  • Any subcritical temperature process can be applied to impart the wear resistant surface layer, such as by way of example and not limitation ferritic nitrocarburizing (hereafter "FNC”), physical vapor deposition (hereafter "PVD”), or chemical vapor deposition (hereafter "CVD”).
  • FNC ferritic nitrocarburizing
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • FNC is a thermochemical surface hardening process that includes diffusion of nitrogen and carbon onto the lash adjuster body.
  • PVD is a process in which a solid coating material is evaporated by heat or by bombardment with ions on a workpiece to be coated.
  • CVD is a process in which a workpiece is exposed to one or more volatile precursors which react and/or decompose on the workpiece to produce the desired coating.
  • Such processes for imparting a wear resistant surface layer may be employed with or without a vacuum process to minimize or eliminate distortion.
  • the machining can include producing a side hole on the body, such as aperture 42.
  • the machining could include creating an outer diameter groove such as groove 27.
  • the machining could include creating the geometry for a hook portion such as hook portion 98b shown in FIG. 4 .
  • the machining operation could remove a portion of the wear resistant surface layer that was previously imparted to the lash adjuster body 20. Machining can also include material removal to correct the overall length of the lash adjuster body 20 and include lead-in angles or chamfers and/or radii on the inner and outer cylindrical surfaces.
  • the lash adjuster body would undergo a heat treatment process such as carbonitriding.
  • Carbonitriding is a metallurgical surface modification technique that is used to increase surface hardness of a metal. Heat-treating the lash adjuster body with a process such as carbonitriding can cause the geometry of the lash adjuster body to be distorted. In such scenarios, a subsequent machining or grinding or material working step is necessary to return the lash adjuster body to its "preheat treated" shape or to an otherwise desired resultant shape.
  • a conventional heat treatment step is replaced by incorporating a subcritical temperature process such as FNC or PVD or CVD that imparts a wear resistant surface layer and helps preserve the functional geometry of the lash adjuster body requiring no additional operations to correct distortion.
  • FNC enhances the wear resistance of a surface.
  • substantial time and cost savings may be realized by manufacturing the lash adjuster body according to the present method.
  • the functional geometry of the lash adjuster body is preserved as the wear resistant surface is being imparted.
  • the lash adjuster body can thus be functionally operable after the imparting of the wear resistant surface.
  • the wear resistant surface layer can have a depth of less than forty microns in some embodiments of the present disclosure.
  • the wear resistant surface layer can have a depth of less than thirty microns in some embodiments of the present disclosure.
  • the wear resistant surface layer can have a depth of less than twenty microns in some embodiments of the present disclosure.
  • the wear resistant surface layer can have a depth of between ten and twenty microns in some embodiments of the present disclosure.
  • the wear resistant surface layer can have a depth of between one and ten microns in some embodiments of the present disclosure.
  • the lash adjuster body can be subjected to cleaning and/or polishing. Cleaning and polishing could be carried out concurrently or sequentially. Any mechanical methods can be applied to re-establish the surface finish after a wear resistant surface layer is imparted. A plurality of lash adjuster bodies can be cleaned and polished at one time.
  • the lash adjuster body can be sized and sorted.
  • the method discussed above can produce more repeatable lash adjuster bodies thereby reducing categories for size and sort operations.
  • the conventional heat treating step that can alter the geometry of the lash adjuster body and (ii) the subsequent machining (such as grinding) step that can further alter the geometry of the lash adjuster body are both eliminated, together less opportunities for the shape of the lash adjuster body to be distorted are presented.
  • the geometries of the lash adjuster bodies are therefore more consistent. Inventory can be reduced. Capital cost can also be significantly reduced for processing the components.
  • the lash adjuster assembly 10 is of the Type 2 valve train variety. It will be appreciated, however, that the teachings discussed herein with regard to the lash adjuster assembly 10 can be used in any configuration of lash adjuster and is not limited to the configuration shown in FIG. 2 .
  • the lash adjuster assembly 10 can generally include a lash adjuster body 20 and a leak down and ball plunger combination 22.
  • the leak down and ball plunger combination 22 can include a ball plunger 23 and a leak down plunger 25.
  • lash adjuster body 20 may also be applicable to other components of the lash adjuster assembly 10 including, but not limited to, the ball plunger 23 and/or the leak down plunger 25 of the leak down and ball plunger combination 22.
  • the lash adjuster body 20 can generally extend along a longitudinal body axis 30 and includes the outer cylindrical surface 32 and the inner cylindrical surface 33.
  • the inner cylindrical surface 33 can define the blind bore 40.
  • a fluid port 42 can be defined through the lash adjuster body 20.
  • the lash adjuster body 20 can be assembled with the remaining components of a lash adjuster assembly 10. The components can then be provided into a final lash adjuster assembly.
  • the leak down plunger 25 and the ball plunger 23 can be inserted in the lash adjuster body 20 at 114.
  • the leak down plunger 25 can be received in the inner cylindrical surface 33 of the lash adjuster body 20. All or the majority of the inner cylindrical surface 33 can be preserved in an as-formed condition and the leak down plunger 25 can be slidably engaged with the majority of the inner cylindrical surface 33 during insertion. After assembly and in operation, the leak down plunger 25 can be slidably engaged with the leak down portion 34 of the inner cylindrical surface 33.
  • the majority of the outer cylindrical surface 32 can also be preserved in an as-formed condition.
  • the exemplary process can end at 116 in FIG. 1 .
  • the leak down plunger 25 can be configured for reciprocal movement relative to the lash adjuster body 20 along the longitudinal body axis 30. This movement can be sliding movement of the outside surface of the leak down plunger 25 against the leak down portion 34 of the inner cylindrical surface 33.
  • a plunger spring 50 can be disposed within the blind bore 40 underneath the leak down plunger 25 and be configured to bias the leak down plunger 25 in an upward direction (as viewed in FIG. 2 ) relative to the lash adjuster body 20.
  • the plunger spring 50 can act at all times to elevate the leak down plunger 25 to maintain its engagement with the hemispherical concave surface (not shown) of a rocker arm (not shown).
  • a retaining member 60 is provided adjacent an upper portion of the lash adjuster body 20.
  • the retaining member 60 limits upward movement of the leak down plunger 25 relative to the lash adjuster body 20 and retains the leak down plunger 25 within the lash adjuster body 20.
  • the lash adjuster assembly 10 includes a check valve assembly 70 positioned between the plunger spring 50 and the leak down plunger 25 of the leak down and ball plunger combination 22.
  • the check valve assembly 70 functions to either permit fluid communication or block fluid communication between a low-pressure fluid chamber 76 and a high-pressure fluid chamber 78 in response to pressure differential between the two fluid chambers 76 and 78.
  • the check valve assembly 70 can include a retainer 80 that is in engagement with the leak down plunger 25 of the leak down and ball plunger combination 22, a check ball 90, and a check ball spring 96 that is disposed between the leak down plunger 25 and the check ball 90.
  • the check ball spring 96 can be configured to bias the check ball 90 in a downward direction (as viewed in FIG. 2 ).
  • the check valve assembly 70 can be referred to by those skilled in the art as "normally open.”
  • the lash adjuster assembly 10a can extend along an axis 30a and generally include a lash adjuster body 20a and a leak down and ball plunger combination 22a.
  • An aperture 42a can be defined in the lash adjuster body 20a.
  • the lash adjuster assembly 10a can comprise similar components as described above, but be configured as a normally closed lash adjuster.
  • the lash adjuster body 20a can have an outer cylindrical surface 32a and an inner cylindrical surface 33a.
  • the inner cylindrical surface 33a can include a leak down portion 34a, a blind bore 40a, and a plunger shelf 41a.
  • the lash adjuster body 20a can be formed using the techniques described above. Specifically, the lash adjuster body 20a can be constructed using the method described above that avoids a heat treatment step and alternatively incorporates a process that imparts a wear resistant surface layer such as FNC, PVD, or CVD.
  • FIG. 4 discloses another embodiment of the present disclosure.
  • a lash adjuster assembly constructed in accordance with another example of the present disclosure is shown and generally identified at reference number 10b.
  • the lash adjuster assembly 10b can extend along an axis 30b and generally include a lash adjuster body 20b and a leak down and ball plunger combination 22b.
  • the lash adjuster body 20b can have an outer cylindrical surface 32b and an inner cylindrical surface 33b.
  • the inner cylindrical surface 33b can include a leak down portion 34b, a blind bore 40b, and a plunger shelf 41b.
  • the inner cylindrical surface 33b can further comprise a notch 43b.
  • the notch 43b can be semi-obovate in cross-section and be positioned between the leak down portion 34b and the plunger shelf 41b.
  • An aperture 42b can be defined in the lash adjuster body 20b.
  • the lash adjuster assembly 10b can comprise similar components as described above, but be configured as a normally closed lash adjuster.
  • the lash adjuster body 20b can be formed using the techniques described above. Specifically, the lash adjuster body 20b can be constructed using the method described above that avoids a heat treatment step and alternatively incorporates a subcritical temperature process that imparts a wear resistant surface layer such as FNC, PVD, or CVD.
  • the lash adjuster body 20b can define an inner diameter relief or hook portion 98b.
  • the hook portion 98b can be created in the lash adjuster body 20b after a wear resistant surface layer is imparted.
  • the wear resistant surface layer on the inside and/or outside of the hook portion 98b can be removed prior to crimping of the hook portion 98b to prevent fracture or breakage.
  • the hook portion 98b can be crimped or deformed to provide retention of the leak down and ball plunger combination 22b within the lash adjuster assembly 10b and can eliminate the need for bottle-caps, wires and clips to retain the leak down and ball plunger combination 22b.
  • the hook portion 98b of the body 20b that is used for retention of the leak down and ball plunger combination 22b, can be used with conventional heat treatment of the lash adjuster body.
  • the case or hard outer layers can be removed before crimping to prevent cracking or fracturing.
  • FIG. 5 discloses another embodiment of the present disclosure, a variant of the embodiment shown in FIG. 4 .
  • a lash adjuster assembly constructed in accordance with another example of the present disclosure is shown and generally identified at reference number 10c.
  • the lash adjuster assembly 10c can extend along an axis 30c and generally include a lash adjuster body 20c and a leak down and ball plunger combination 22c.
  • the lash adjuster body 20c can have an outer cylindrical surface 32c and an inner cylindrical surface 33c.
  • the inner cylindrical surface 33c can include a leak down portion 34c, a blind bore 40c, and a plunger shelf 41c.
  • the inner cylindrical surface 33c can further comprise a notch 43c.
  • the notch 43c can be semi-obovate in cross-section and be positioned between the leak down portion 34c and the plunger shelf 41c. Notches of other shapes can be applied in other embodiments of the present disclosure.
  • An aperture 42c can be defined in the lash adjuster body 20c.
  • the lash adjuster assembly 10c can comprise similar components as described above, but be configured as a normally closed lash adjuster.
  • the lash adjuster body 20c can be formed using the techniques described above. Specifically, the lash adjuster body 20c can be constructed using the method described above that avoids a heat treatment step and alternatively incorporates a subcritical temperature process that imparts a wear resistant surface layer such as FNC, PVD, or CVD.
  • the lash adjuster body 20c can define an inner diameter relief or hook portion 98c. The hook portion 98c can be created in the lash adjuster body 20c after a wear resistant surface layer is imparted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (15)

  1. Procédé de fabrication d'un assemblage de régleur de jeu (10b ; 10c), le procédé comprenant :
    la formation d'un corps de régleur de jeu (20b ; 20c) dans un état tel que formé comprenant une surface cylindrique extérieure (32b ; 32c) et une surface cylindrique intérieure (33b ; 33c) ayant une partie d'écoulement vers le bas (34b ; 34c) et un alésage borgne (40b ; 40c) ;
    la dotation d'une couche de surface résistante à l'usure à au moins la partie d'écoulement vers le bas de la surface cylindrique intérieure et à une partie sélectionnée du corps de régleur de jeu avec un procédé à température sous-critique ; et
    la préservation de la partie d'écoulement vers le bas dans l'état tel que formé durant la dotation de la couche de surface résistante à l'usure ; et
    suite à la dotation de la couche de surface résistante à l'usure, le retrait de la couche de surface résistante à l'usure au niveau d'une partie sélectionnée du corps de régleur de jeu (20b ; 20c) ;
    le sertissage de la partie sélectionnée du corps de régleur de jeu (20b ; 20c) pour créer une partie de crochet (98b ; 98c) configurée pour retenir un plongeur à écoulement vers le bas et bille (22b ; 22c) de l'assemblage de régleur de jeu (10b ; 10c).
  2. Procédé selon la revendication 1, dans lequel la formation est en outre définie par la formation d'un corps de régleur de jeu (20b ; 20c) avec l'un parmi un façonnage à froid, un estampage, un étirage, un moulage par injection de métal, un frittage de métal en poudre, et un usinage.
  3. Procédé selon la revendication 1, dans lequel la formation est en outre définie par le façonnage à froid du corps de régleur de jeu (20b ; 20c) dans l'état tel que formé ayant une géométrie fonctionnelle.
  4. Procédé selon la revendication 3, dans lequel la préservation est en outre définie par la préservation de la géométrie fonctionnelle de la partie d'écoulement vers le bas (34b ; 34c) dans l'état tel que formé pendant et éventuellement aussi après dotation de la couche de surface résistante à l'usure.
  5. Procédé selon la revendication 1, dans lequel la dotation est en outre définie par la dotation d'une couche de surface résistante à l'usure à au moins la partie d'écoulement vers le bas de la surface cylindrique intérieure (33b ; 33c) avec un procédé à température sous-critique qui est l'un choisi parmi une nitrocarburation ferritique, un dépôt physique en phase vapeur, et un dépôt chimique en phase vapeur.
  6. Procédé selon la revendication 1, dans lequel la préservation comprend en outre la préservation de la partie d'écoulement vers le bas de la surface cylindrique intérieure (33b ; 33c) dans l'état tel que formé après dotation de la couche de surface résistante à l'usure.
  7. Procédé selon la revendication 1, dans lequel la préservation comprend en outre la préservation d'une majorité de la surface cylindrique intérieure et/ou extérieure (33b ; 33c ; 32b ; 32c) dans l'état tel que formé après dotation de la couche de surface résistante à l'usure.
  8. Procédé selon la revendication 1, comprenant en outre au moins l'un parmi :
    (a) le maintien d'une dureté du corps de régleur de jeu (20b ; 20c) sous la couche de surface résistante à l'usure après la formation et durant la dotation,
    (b) le recuit du corps de régleur de jeu (20b ; 20c) avant la dotation pour relâcher les contraintes survenant durant la formation, et
    (c) le nettoyage du corps de régleur de jeu (20b ; 20c) après la dotation ; et
    le polissage du corps de régleur de jeu (20b ; 20c) après la dotation.
  9. Corps de régleur de jeu (20b ; 20c) pour une utilisation dans un assemblage de régleur de jeu (10b ; 10c), le corps d'ajusteur de jeu comprenant :
    une surface cylindrique extérieure (32b ; 32c) ;
    une surface cylindrique intérieure (33b ; 33c) ayant une partie d'écoulement vers le bas (34b ; 34c) et un alésage borgne (40b ; 40c), où au moins la partie d'écoulement vers le bas de la surface cylindrique intérieure comprend une couche de surface résistante à l'usure apportée avec un procédé à température sous-critique et la partie d'écoulement vers le bas est préservée dans un état tel que formé existant avant la dotation de la couche de surface résistante à l'usure ; et
    une partie de crochet (98b ; 98c) formée sur une zone du corps de régleur de jeu (20b ; 20c) sans la couche de surface résistante à l'usure, la partie de crochet étant configurée pour retenir un plongeur à écoulement vers le bas et à bille (22b ; 22c) de l'assemblage de régleur de jeu (10b ; 10c).
  10. Corps de régleur de jeu selon la revendication 9, dans lequel la majorité d'au moins l'une parmi la surface cylindrique extérieure (32b ; 32c) et la surface cylindrique intérieure (33b ; 33c) est modifiée par l'intermédiaire du procédé à température sous-critique qui est l'un parmi une nitrocarburation ferritique, un dépôt physique en phase vapeur, et un dépôt chimique en phase vapeur.
  11. Corps de régleur de jeu selon la revendication 9, dans lequel la surface cylindrique intérieure (33b ; 33c) comprend en outre une plate-forme de plongeur (41b ; 41c) et une encoche (43b, 43c) positionnée entre la partie d'écoulement vers le bas (34b ; 34c) et la plate-forme de plongeur.
  12. Assemblage de régleur de jeu comprenant :
    le corps de régleur de jeu (20b ; 20c) de la revendication 9 ; et
    un plongeur à écoulement vers le bas (25) reçu de façon coulissante dans la surface cylindrique intérieure (33b ; 33c) contre la partie d'écoulement vers le bas (34b ; 34c).
  13. Assemblage de régleur de jeu selon la revendication 12, dans lequel la majorité de la surface cylindrique extérieure (32b ; 32c) et la majorité de la surface cylindrique intérieure (33b ; 33c) comprennent la couche de surface résistante à l'usure et les majorités des surfaces cylindriques extérieure et intérieure sont préservées dans l'état tel que formé existant avant la dotation de la couche de surface résistante à l'usure.
  14. Assemblage de régleur de jeu selon la revendication 12, dans lequel la majorité de la surface cylindrique intérieure (33b ; 33c) comprend la couche de surface résistante à l'usure et la géométrie fonctionnelle de la majorité de la surface cylindrique intérieure est maintenue dans l'état tel que formé existant avant la dotation de la couche de surface résistante à l'usure.
  15. Corps de régleur de jeu selon la revendication 12, dans lequel la couche de surface résistante à l'usure est en outre définie comme ayant une profondeur inférieure à quarante micromètres.
EP14849857.9A 2013-09-27 2014-09-26 Dispositif de réglage de jeu et procédé de fabrication de ce dernier Active EP3049645B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361883625P 2013-09-27 2013-09-27
PCT/US2014/057760 WO2015048475A1 (fr) 2013-09-27 2014-09-26 Dispositif de réglage de jeu et procédé de fabrication de ce dernier

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EP3049645A1 EP3049645A1 (fr) 2016-08-03
EP3049645A4 EP3049645A4 (fr) 2017-04-12
EP3049645B1 true EP3049645B1 (fr) 2020-03-11

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932290A (en) * 1957-12-27 1960-04-12 Harvey Machine Co Inc Low inertia valve lifter unit and method of making the same
US3291107A (en) * 1965-06-16 1966-12-13 Johnson Products Inc Temperature compensating hydraulic tappet
DE102004043550B4 (de) * 2004-09-09 2012-02-16 Schaeffler Technologies Gmbh & Co. Kg Verschleißfeste Beschichtung, ihre Verwendung und Verfahren zur Herstellung derselben

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* Cited by examiner, † Cited by third party
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EP3049645A4 (fr) 2017-04-12

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