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EP1563961B1 - Appareillage et procédé de montage d'un mécanisme de soupape - Google Patents

Appareillage et procédé de montage d'un mécanisme de soupape Download PDF

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Publication number
EP1563961B1
EP1563961B1 EP04100536A EP04100536A EP1563961B1 EP 1563961 B1 EP1563961 B1 EP 1563961B1 EP 04100536 A EP04100536 A EP 04100536A EP 04100536 A EP04100536 A EP 04100536A EP 1563961 B1 EP1563961 B1 EP 1563961B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve stem
tappet
camshaft
stem
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.)
Expired - Lifetime
Application number
EP04100536A
Other languages
German (de)
English (en)
Other versions
EP1563961A1 (fr
Inventor
Torsten Kluge
Frank Aust
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP04100536A priority Critical patent/EP1563961B1/fr
Priority to DE502004002084T priority patent/DE502004002084D1/de
Publication of EP1563961A1 publication Critical patent/EP1563961A1/fr
Application granted granted Critical
Publication of EP1563961B1 publication Critical patent/EP1563961B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/24—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same mounting or demounting valves
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L1/205—Adjusting or compensating clearance by means of shims or the like
    • 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
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/02—Formulas

Definitions

  • the invention relates to a device and a method for assembling at least one valve arrangement in which a valve stem is firmly connected to a valve stem.
  • a device for pressing a valve spring which has a provided with a groove for receiving a jaw of a screw clamp adapter, which exerts the compressive force on the valve spring with its flat lower end face.
  • a preassembled unit for mounting a valve assembly is known in which a holding device is used for temporarily holding together the spring, the spring seat and the spring lock prior to assembly in the valve assembly.
  • a valve arrangement for an internal combustion engine which contains a valve element with a valve stem, which is surrounded on its upper side by a cup-shaped valve stem, wherein the valve stem is firmly connected to the valve stem, for example by welding.
  • a valve stem which is surrounded on its upper side by a cup-shaped valve stem, wherein the valve stem is firmly connected to the valve stem, for example by welding.
  • exchangeable shims of different thickness are used.
  • Other arrangements using a shim are known from JP-A-06081615 or JP-A-61072810.
  • valve stem is composed of three sections, one of which is formed as a disc third section slidably but rotationally fixed on the first section is arranged and is in meshing engagement with the likewise formed as a disc second section by the action of a spring.
  • the device according to the invention is used for mounting at least one valve arrangement of the type described above, in which a valve stem is firmly connected to a valve stem.
  • the device is set up to set a defined positioning of the valve tappet on the valve stem preassembled in the cylinder head of an internal combustion engine before the valve tappet and the valve stem are finally connected to one another.
  • a “defined positioning” is to be understood in particular as meaning a positioning in which the valve tappet in its final position of use has a predetermined desired distance from the cams of a camshaft arrangement. In particular, this distance (“lash”) can be chosen so that it corresponds to the game to be complied between valve stem and cam, so that no further shims are required. The material savings of the shims and the correspondingly faster assembly of the valve assembly can be saved considerable costs.
  • the device has at least one storage area with at least one (preferably adjacent thereto) stamp area.
  • the storage area is designed so that it can be inserted into a camshaft bearing, wherein during this introduction of the associated punch area simultaneously a valve stem, which is pre-mounted on a valve stem, in its defined position suppressed.
  • Storage area and punch area of the device thus act together as a mold or a die, which ensures by moving the bearing area in a reference position (camshaft bearing) that the valve stem is pressed on the valve stem in the desired desired position.
  • a device of this type may in particular be rotationally symmetrical, so that the bearing area and / or the stamp area are cylindrical. This has the advantage that it is not necessary to pay attention to the exact angular orientation of the device, which simplifies their application accordingly.
  • this is designed to effect parallel or simultaneous positioning in a plurality of valve arrangements belonging to a camshaft of the internal combustion engine.
  • a device of the type described above similar to a camshaft may be rod-shaped, wherein the bearing areas are located exactly at the locations of the pivot bearing of a camshaft and wherein the associated punch areas are located at the positions of the cams.
  • this has at least one sensor with which the current position of the valve stem and / or the valve stem can be detected. With the help of the sensor can therefore be monitored when the valve stem or the valve stem reaches a desired position in which the firm connection between the valve stem and valve tappet can be made.
  • the sensor may be configured to measure the position of the valve lifter relative to the support of the valve assembly, for example relative to (at least) one camshaft bearing.
  • the device further optionally includes means for fixing the position of the valve stem so that it can not move when the relative position of the valve stem on the valve stem is adjusted.
  • these means can be designed so that this valve stem in the closed position of Fix the valve.
  • the means may be designed as a stamp which presses against the valve from the cylinder inside of an internal combustion engine and holds it in the closed position.
  • the means may also be designed to produce or maintain a certain overpressure in the cylinder of an internal combustion engine which holds the valve in the closed position.
  • the device may according to another embodiment holding means such as grippers, with which parts of the valve assembly can be held and transported to its mounting location. These parts may in particular be the valve tappet, sealing components and / or the valve spring.
  • holding means such as grippers, with which parts of the valve assembly can be held and transported to its mounting location. These parts may in particular be the valve tappet, sealing components and / or the valve spring.
  • valve stem and valve tappet can be made, or represent the actuators or components for other assembly operations.
  • the method is carried out with a device of the type described above. Therefore, with regard to further details, advantages and developments of the method, reference may additionally be made to the above description.
  • the method has the advantage that in a single operation a usable positioning and fixation of the valve lifters on the valve stems takes place without, for example, a readjustment with an insert disk would be necessary later.
  • the achievement of the defined positioning is monitored by sensors.
  • the sliding of the valve stem can be terminated in a fed-back method, if this has reached exactly its desired position.
  • the defined positioning can be determined in particular relative to the position of one or more reference points on the carrier of the valve arrangement (for example, the cylinder head of an internal combustion engine).
  • Preferred reference points are the bearings of the camshaft or the valve seat.
  • the positioning of each valve lifter may be determined relative to (at least) one associated camshaft bearing.
  • the defined positioning is determined relative to the averaged position of at least two reference points on the support of the valve assembly. For example, the average of the position of two adjacent camshaft bearings can be determined, and the position of the valve lifters associated with these camshaft bearings can be determined relative to this average value.
  • FIG. 1 shows an exemplary embodiment of a valve arrangement whose assembly is to be improved in the context of the present invention.
  • This valve arrangement is characterized in that a cup-shaped valve stem 21 is fixed with a receiving sleeve in the interior on the upper end of a valve stem 25.
  • the firm connection between valve stem 25 and valve stem 21 can then be produced, for example, by bonding, press fit, clamping, gluing or welding.
  • Such a valve arrangement is known from EP 1 375 842 A1, which is incorporated by reference in its entirety into the present application.
  • FIG. 2 shows a first variant of the solution in this regard.
  • four cylinders 24 of the cylinder bank of an internal combustion engine are shown schematically in the lower part of the figure, which each have valve assemblies 20 with four inlet and outlet valves. Of these, the circular valve seats 23 can be seen in the figure.
  • camshaft bearings 22 are indicated in the figure for one of the camshafts, which are each located between two valves of a cylinder.
  • a camshaft (not shown) is rotatably mounted in the camshaft bearings 22, wherein a two-part construction of the camshaft bearing is generally made of a base and a cap (omitted in FIG. 2) (see EP 1 350 931 A1).
  • two valve tappets 21 associated with said camshaft row are indicated for the first cylinder 24. To simplify the illustration, these are omitted in the other cylinders.
  • a mounting device 10 for the assembly of valve tappets 21 is shown on Ventiltechften.
  • the rotationally symmetrical device 10 has great similarity with a camshaft and comprises in the core a shaft 13 made of rolled steel.
  • this shaft 13 has a bearing portion 11 and adjacent thereto to the left and right each a punch area 12.
  • the bearing portions 11 are located exactly at the positions of the pivot bearing of an associated camshaft or at the positions of the camshaft bearing 22 on the cylinder head.
  • the diameter of the bearing portions 11 typically corresponds to the diameter of the corresponding camshaft at that location plus twice the width of the camshaft nip (i.e., the gap between a camshaft bearing 22 and a camshaft therein).
  • the punch areas 12 are located at the locations where the cams are seated in the associated camshaft, and they are cylindrical in the example shown.
  • valve assemblies 20 in a cylinder bank of Figure 2 begins with the valve members with the valve stems and the valve lifters 21 and other individual components of the valve assemblies (eg, valve stem seals or the valve spring) in all of a camshaft Valves are pre-assembled in the holes of the cylinder head.
  • the valve lifters 21 are only a small piece attached to the associated valve stems 25, so that while they hold there, but still need to be postponed for reaching their final position.
  • This further pushing is then carried out with the mounting device 10, wherein the valve stems are held firmly in place by a fixation of the associated valve.
  • This fixation can be done for example by appropriate (one or more parts) punch or punching tools from the combustion chamber forth (not shown).
  • a high gas or liquid pressure can be generated in the interior of the combustion chamber of the engine, which prevents an opening movement of the valves.
  • the mounting device 10 is then inserted with the bearing areas 11 in the associated camshaft bearing 22.
  • the punch areas 12 press simultaneously on the valve tappets 21, so that they are further pushed onto the valve stems.
  • the bearing areas 11 reach their form-fittingly defined position in the camshaft bearings 22, the valve tappets 21 have also reached their correct, defined positioning on the valve stems. Since any movement exerted by a fitter or an assembly robot is transmitted to the valve lifters via the fixture 10, this positioning method is extremely robust to variations in the assembly process.
  • valve tappets 21 and the valve stems are made, for which in particular the bonding, the press connection, the clamping and the gluing are suitable.
  • An advantage of these types of connection is that they unfold their effect directly when attaching the valve stem to the valve stem, as a rule after positioning no special activity is required.
  • Figure 2 shows only the simplest possible embodiment of a mounting device 10.
  • Other embodiments could, for example, be non-rotationally symmetric or be equipped with joints or connections to actuators and / or other components.
  • the tool 10 could also have holding devices with which preassembled valve tappets or other components such as a valve stem seal or the valve spring could be transported by a supply to the cylinder head and placed there on the valve stems.
  • FIG. 3 shows a variant in which a sensor 111 monitors the positioning of a valve tappet 21 on a valve stem 25.
  • the valve stem is pressed by a one-piece or multi-part punching device 110 until reaching the desired position on the valve stem 25, while the valve stem 25 is held simultaneously.
  • the sensor 111 indicates in this case, when the postponement is to be stopped.
  • Sensors 111 suitable for the measurements are, for example, a contact sensor, a proximity sensor, an ultrasonic sensor, a light barrier or the like.
  • the friction welding is selected as the connection method between valve stem 25 and valve stem 21, in which the valve stem 25 is rotated to generate heat, in addition to the height of the valve stem 21, the height of the valve stem 25 must be measured relative to the camshaft bearing 22.
  • the position of the valve lifter 21 and / or valve stem 25 may be measured individually with respect to each reference point, for example, with respect to the associated camshaft bearing 22 or valve seat (not shown).
  • the reference point for the height to be set of the valve tappet 21 can also be determined as the mean value of two reference points on the cylinder head, for example as the center of the positions of two (adjacent) camshaft bearings 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (9)

  1. Dispositif (10, 110) pour le montage d'au moins un agencement de soupape (20), dans lequel un poussoir de soupape (21) est fixement connecté à une tige de soupape (25), le dispositif étant prévu pour l'ajustement d'une position définie du poussoir de soupape (21) sur la tige de soupape prémontée (25) avant la connexion définitive entre le poussoir de soupape (21) et la tige de soupape (25),
    caractérisé en ce que
    le dispositif comprend au moins une zone de palier (11) avec au moins une zone de poinçon (12) adjacente, la zone de palier (11) pouvant être introduite dans un palier d'arbre à came (22), tandis que la zone de poinçon (12) presse simultanément le poussoir de soupape (21) prémonté sur la tige de soupape (25) dans sa position définie.
  2. Dispositif (10) selon la revendication 1,
    caractérisé en ce que
    celui-ci est réalisé de manière à provoquer un positionnement parallèlement dans plusieurs agencements de soupape (20) appartenant à un arbre à cames.
  3. Dispositif (110) selon la revendication 1 ou 2,
    caractérisé en ce que
    celui-ci comprend au moins un capteur (111), avec lequel la position actuelle du poussoir de soupape (21) et/ou de la tige de soupape (25) peut être détectée.
  4. Dispositif (10, 110) selon au moins l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    celui-ci comprend des moyens pour fixer la position de la tige de soupape (25), de préférence pour la fixation dans la position de fermeture de la soupape.
  5. Dispositif (10, 110) selon au moins l'une quelconque des revendications 1 à 4,
    caractérisé par
    des dispositifs de maintien pour retenir des pièces de l'agencement de soupape (20) pour son transport au lieu de montage.
  6. Procédé pour le montage d'un agencement de soupape (20) au moyen d'un dispositif selon l'une quelconque des revendications précédentes, qui comprend au moins une zone de palier (11) avec au moins une zone de poinçon (12) adjacente, comprenant les étapes de :
    a) prémontage d'une tige de soupape (25) dans la culasse d'un moteur à combustion interne ;
    b) prémontage d'un poussoir de soupape (21) sur la tige de soupape (25) ;
    c) avance supplémentaire du poussoir de soupape (21) sur la tige de soupape (25), jusqu'à ce qu'un positionnement défini soit atteint, la zone de palier (11) étant introduite dans le palier d'arbre à cames associé, tandis que la zone de poinçon (12) presse simultanément le poussoir de soupape prémonté sur la tige de soupape (25) dans son positionnement défini ;
    d) établissement d'une connexion fixe entre le poussoir de soupape (21) et la tige de soupape (25).
  7. Procédé selon la revendication 6,
    caractérisé en ce que
    l'obtention du positionnement défini est contrôlée par capteur.
  8. Procédé selon la revendication 6 ou 7,
    caractérisé en ce que
    le positionnement défini est déterminé par rapport à la position d'un ou de plusieurs points de référence sur le support (22) de l'agencement de soupape.
  9. Procédé selon au moins l'une quelconque des revendications 6 à 8,
    caractérisé en ce que
    le positionnement défini est déterminé par rapport à la position moyenne de deux points de référence sur le support (22) de l'agencement de soupape.
EP04100536A 2004-02-12 2004-02-12 Appareillage et procédé de montage d'un mécanisme de soupape Expired - Lifetime EP1563961B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04100536A EP1563961B1 (fr) 2004-02-12 2004-02-12 Appareillage et procédé de montage d'un mécanisme de soupape
DE502004002084T DE502004002084D1 (de) 2004-02-12 2004-02-12 Vorrichtung und Verfahren zur Montage einer Ventilanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04100536A EP1563961B1 (fr) 2004-02-12 2004-02-12 Appareillage et procédé de montage d'un mécanisme de soupape

Publications (2)

Publication Number Publication Date
EP1563961A1 EP1563961A1 (fr) 2005-08-17
EP1563961B1 true EP1563961B1 (fr) 2006-11-22

Family

ID=34684735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04100536A Expired - Lifetime EP1563961B1 (fr) 2004-02-12 2004-02-12 Appareillage et procédé de montage d'un mécanisme de soupape

Country Status (2)

Country Link
EP (1) EP1563961B1 (fr)
DE (1) DE502004002084D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114083474B (zh) * 2021-12-08 2025-03-07 中船动力镇江有限公司 船用低速柴油机调节分散式角度编码器的工装及调节方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191503947A (en) * 1915-03-12 1915-10-21 Marc Birkigt Improvements in or relating to Valve Gears, particularly for Explosion Engines.
US4022583A (en) * 1974-10-11 1977-05-10 K-Line Industries, Inc. Methods for assembling and disassembling valve assemblies
JPS6172810A (ja) * 1984-09-18 1986-04-14 Toyota Motor Corp バルブ機構
US4654944A (en) * 1985-09-13 1987-04-07 Graf Richard W Overhead cam valve spring compressor adapter
JPS62186006A (ja) * 1986-02-10 1987-08-14 Fuji Heavy Ind Ltd 内燃機関の直動式動弁装置
DE4117406A1 (de) * 1991-05-28 1992-12-03 Freudenberg Carl Fa Ventiltrieb im zylinderkopf einer verbrennungskraftmaschine
US5226229A (en) * 1991-08-29 1993-07-13 Pierce Daniel H Self-locking valve spring retainer
US5207196A (en) * 1992-07-31 1993-05-04 Trw Inc. Pre-assembled unit for engine valve system
JPH0681615A (ja) * 1992-09-02 1994-03-22 Nissan Motor Co Ltd 直動式バルブ駆動機構
EP1375842A1 (fr) * 2002-06-19 2004-01-02 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Dispositif de soupape pour moteur à combustion interne et méthode de fabrication

Also Published As

Publication number Publication date
DE502004002084D1 (de) 2007-01-04
EP1563961A1 (fr) 2005-08-17

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