EP0859129B1 - Ventilantriebsvorrichtung in Brennkraftmaschine für Kraftfahrzeug und Verfahren zum Einbau dieser Vorrichtung - Google Patents

Ventilantriebsvorrichtung in Brennkraftmaschine für Kraftfahrzeug und Verfahren zum Einbau dieser Vorrichtung Download PDF

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Publication number
EP0859129B1
EP0859129B1 EP98400136A EP98400136A EP0859129B1 EP 0859129 B1 EP0859129 B1 EP 0859129B1 EP 98400136 A EP98400136 A EP 98400136A EP 98400136 A EP98400136 A EP 98400136A EP 0859129 B1 EP0859129 B1 EP 0859129B1
Authority
EP
European Patent Office
Prior art keywords
supporting element
support
interrupter
supporting
moveable arm
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
EP98400136A
Other languages
English (en)
French (fr)
Other versions
EP0859129A1 (de
Inventor
Philippe Chemin
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0859129A1 publication Critical patent/EP0859129A1/de
Application granted granted Critical
Publication of EP0859129B1 publication Critical patent/EP0859129B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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

Definitions

  • the present invention relates to a device for control of a motor vehicle engine valve and a method of mounting this device.
  • a vehicle engine valve control device automobile of the type comprising a camshaft urging a valve stem via a latch actuated by a corresponding shaft cam, the latch comprising a first bearing end mounted to oscillate on a support member carried by a part of the engine, forming support, and a second control end cooperating with the valve stem, and of the type comprising means for height adjustment of the support member by screwing this support member in the support.
  • the height adjustment of the support member allows the adjustment of the clearance between the latch and the corresponding cam.
  • the support member is immobilized in height by means of a nut which bears against the support carrying this member and which cooperates with a threaded end of this organ.
  • the control device can also include, if necessary, means of restraint (anti-heaving) of the support end of the latch on the support member comprising generally a pin resiliently urging the latch against the support member.
  • This type of arrangement has various drawbacks linked in particular to the difficulty of access to the nut immobilization which is interposed between the support and the latch and which is therefore at least partially masked by this latch and, if necessary, by the retaining pin.
  • DE-A-25 40 220 describes a device for controlling the aforementioned type, in which the height adjustment means include a stud screwed into the support member, through, on the one hand, the first end of the latch, and on the other hand, a swiveling end of the support member in contact with the latch.
  • the height adjustment means include a stud screwed into the support member, through, on the one hand, the first end of the latch, and on the other hand, a swiveling end of the support member in contact with the latch.
  • access to the height adjustment means is easier because the stud can be maneuvered above the latch.
  • this stud does not prevent effectively release the latch due to the action valve return spring and some engine speeds likely to cause the latch to enter resonance.
  • the control device described in DE-A-25 40 220 also includes a return spring urging the swiveling end of the support member in contact with the latch.
  • This spring intended to reduce clicks and noise of the control device, has the disadvantage also to encourage the release of the latch.
  • DE-A-195 07 240 describes a device for controlling a valve comprising a latch provided with a bearing end oscillating rise on a hydraulic type support member. It is therefore lubricated by oil allowing its operation hydraulic.
  • the support member carries a pawn provided with a head retaining (anti-heaving) of the latch. This device control does not require height adjustment means the support member, since the latter is constantly stressed against the latch under the effect of the oil pressure. In normal engine speed, hydraulic type support member provides quieter operation.
  • the object of the invention is to remedy the drawbacks exposed above so as to obtain means of adjustment in height of the support member and retaining means of the latch on the support member which are easy to access, reliable and simple to manufacture, this by optimizing the motor consumption.
  • the invention relates to a device for controlling a motor vehicle engine valve, of the type comprising a camshaft urging a valve stem by means of a latch actuated by a corresponding cam of the shaft, the latch comprising a first support end oscillatingly mounted on a support member carried by a part of the motor, forming a support (S), and a second control end cooperating with the valve stem, and of the type comprising means for adjusting the height of the support member by screwing this support member into the support (S) and means for retaining the support end of the latch on the support member, characterized in that the height adjustment means and the retaining means comprise a pin common to these means, carried by the support member, provided with a head for retaining the support end of the latch and d drive of the support member and in that the support member is ra ccorded to a lubrication circuit for the surfaces in contact with this support member and the latch.
  • the invention also relates to a method of mounting of a device as defined above, characterized in that first of all, we assemble, away from the support, the bearing end of the latch on the swiveling end of the support member, and the pin is fixed on the swiveling end of the support member, so as to be able to position easily the pawn compared to the latch, then, we go up the entire latch-support member-pin on the support screwing the support member on this support.
  • FIG. 1 shows a device 10 according to the invention for the control of a valve 12 of an engine internal combustion for motor vehicle.
  • the device 10 is arranged in a cylinder head 14 of the motor of which an upper face 16 has been shown.
  • the device 10 comprises a camshaft 18 biasing a valve stem 20 through a latch 22 actuated by a corresponding cam 24 of the shaft 18.
  • the latch 22 has a first support end 22A oscillating rise on a support member 26 and a second control end 22B cooperating with the free end of valve stem 20.
  • the support member 26 is carried by a part of the cylinder head forming a support S.
  • the latch 22 also includes a roller 28 of cooperation with cam 24.
  • This roller is rotatably mounted, by by means of rolling means 29, between the two ends 22A, 22B of the latch, around an axis materialized by a spindle 30 substantially parallel to the camshaft 18.
  • Roller 28 can rotate freely in a hole median 32 of the pawl and protrudes outside of it drilling 32 to cooperate with the cam 24.
  • the control device 10 comprises means for height adjustment of the support member 26 relative to the support S and means for retaining the support end 22A latch on the support member 26.
  • the support member 26 of generally cylindrical shape elongated according to its height, is adjustable in height by screwing in support S.
  • the height adjustment means and the means of retained include a pin 34 common to these means, carried by the support member 26.
  • the pin 34 is provided with a body 36 carrying a head 38 for retaining the support end 22A of the latch and driving in rotation of the support member 26.
  • the head 38 of the pawn is delimited, for example, by a polygonal contour intended to cooperate with a operation 39, of complementary shape.
  • the support member 26 has a first end swiveling 26A cooperating with a complementary form of the support end 22A of the latch, and a second end 26B threaded screwed into support S.
  • the end 26B of the support member is screwed into a sleeve 40 internally threaded, added, for example by force fitting, in a bore 42 of the support S.
  • the sleeve thread is of the self-braking type, by example of the type reported with polygonal turns.
  • the body 36 of the pin 34 is fixed in an axial bore 44 of the swiveling end 26A of the support member, in passing, with clearance, through a through hole 46 formed in the bearing end 22A of the pawl, so that this support end 22A is interposed, with play, between the swiveling end 26A and the head 38.
  • the body 36 of the pin is fixed in the axial hole 44 by means of a pin 48 passing through the swiveling end 26A and the body 36.
  • the pawn 34 can be fixed in the axial hole 44 by gluing or press fit.
  • the device 10 includes lubrication means such as those illustrated in Figure 1 and described below.
  • the through hole 46 is connected to an engine lubrication circuit which has depicted a lubricant supply conduit 50 formed in the cylinder head 14.
  • Axial bore 44 forms one end of a channel longitudinal 52 formed in the support member 26, end to end butt and coaxially to this organ 26.
  • Channel 52 is connected to the lubrication pipe 50, in a manner known per se, in particular by means of a groove longitudinal 54 formed in the outer surface of the sleeve 40.
  • the lubricant from line 50 is supplied to orifice 46, passing through the canal 52. This through orifice 46 thus forms a retention of lubricant allowing lubrication of surfaces in contact of the support end 22A of the latch and of the end swiveling 26A of the support member.
  • the lubricant can flow between the body 36 of the pin and the axial bore 44, thanks to a radial clearance between this body and this hole or else thanks to grooves longitudinal formed in the surfaces facing this body and this piercing.
  • the channel 52 is connected, for example by means of a radial bore 56 made in the threaded end 26A of the support member and a groove internal annular 58 formed in the sleeve 40, to a nozzle 60 lubricant spray.
  • This nozzle 60 is formed in a end of the sleeve 40 projecting from the face 16 of the cylinder head, so as to be directed substantially towards the camshaft 18 and the roller 28.
  • the main stages of the assembly process control device 10 are as follows.
  • the invention has many advantages.
  • the head 38 of the pin 34 arranged above latch 22, is easily accessible by a tool classic training. Adjusting the height of the organ support is therefore very simple to carry out by training the pin 34 in a direction of screwing or unscrewing the support member in the breech.
  • the head 38 of the pawn makes it possible to retain effectively the end 22A of the pawl in contact with the organ support 26, without producing mechanical friction undesirable thanks to surface lubrication means in contact with the latch and the support member, comprising in particular the through hole 46 forming a retaining lubricant.
  • control device is easy to assemble, in particular by means automatic, on the vehicle engine, because the height adjustment means of the support member and means retaining the latch on this support member comprise a common pawn, easy to access.
  • the invention makes it possible to reduce friction mechanics of the valve actuator relative to in particular to conventional hydraulic type devices.
  • the engine consumption is reduced accordingly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (10)

  1. Vorrichtung (10) zur Steuerung eines Ventils (12) einer Brennkraftmaschine für ein Kraftfahrzeug, mit einer Nockenwelle (18), die über einen durch einen entsprechenden Nocken (24) der Welle (18) betätigten Auslösehebel (22) einen Schaft (20) des Ventils beauftschlagt, wobei der Auslösehebel (22) ein erstes Abstützende (22A), das schwenkbar auf einem Stützorgan (26) montiert ist, das an einem als Träger (S) dienenden Motorteil gehalten ist, und ein zweites Steuerende (22B) aufweist, das mit dem Schaft (20) des Ventils zusammenwirkt, und mit Mitteln zur Höhenverstellung des Stützorgans (26) durch Einschrauben desselben in den Träger (S) und Mitteln zum Halten des Abstützendes (22A) des Auslösehebels auf dem Stützorgan (26), dadurch gekennzeichnet, daß die Mittel zur Höhenverstellung und die Haltemittel einen diesen Mitteln gemeinsamen Bolzen (34) aufweisen, der durch das Stützorgan (26) gehalten ist und einen Kopf (38) zum Halten des Abstützendes (22A) des Auslösehebels und zum Antrieb des Stützorgans (26) aufweist, und daß das Stützorgan (26) an einen Schmierungskreislauf (50) für die Berührungsflächen dieses Stützorgans und des Auslösehebels (22) angeschlossen ist.
  2. Vorizchtung nach Anspruch 1, dadurch gekennzeichnet, daß das Stützorgan (26) in eine mit Innengewinde versehene Hülse (40) eingeschraubt ist, die in eine Bohrung (42) des Trägers (S) eingesetzt ist, wobei das Gewinde der Hülse (40) selbsthemmend ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Stützorgan (26) eine allgemein zylindrische, in der Höhe langgestreckte Form hat und ein erstes Kugelgelenk-Ende (26A), das mit einer komplementären Form des Abstützendes (22A) des Auslösehebels zusammenwirkt, und ein zweites Gewindeende (26B) aufweist, das in den Träger (S) eingeschraubt ist, und daß der Bolzen (34) weist einen Körper (36) aufweist, der den Kopf (38) trägt und in einer Axialbohrung (44) des Kugelgelenk-Endes (26A) des Stützorgans befestigt ist und eine durch das Abstützende (22A) des Auslösehebels hindurchgehende Öffnung (46) mit Spiel durchquert, derart, daß dieses Abstützende (22A) mit Spiel zwischen dem Stützorgan (26) und dem Kopf (38) des Bolzens eingefügt ist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß ist der Bolzen (34) in der Axialbohrung (44) befestigt ist durch Klebung, Einpressen oder mit Hilfe eines Stiftes (48), der das Kugelgelenk-Ende (26A) des Stützorgans und den Körper (36) des Bolzens durchquert.
  5. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die den Auslösehebel (22) durchquerende Öffnung (46) an den Schmierungskreislauf (50) des Motors angeschlossen ist und eine Schmiermittelkammer bildet, die die Schmierung der Berührungsflächen des Abstützendes (22A) des Auslösehebels und des Kugelgelenk-Endes (26A) des Stützorgans gestattet.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Axialbohrung (44) des Kugelgelenk-Endes (26A) ein Ende eines Kanals (52) bildet, der an den Schmierungskreislauf (50) angeschlossen ist und der in Längsrichtung von Ende zu Ende in dem Stützorgan (26) ausgebildet ist.
  7. Vorrichtung nach den Ansprüchen 2 und 6 in Kombination, dadurch gekennzeichnet, daß der Kanal (52) an eine Sprühdüse (60) für Schmiermittel angeschlossen ist, die im wesentlichen auf die Nockenwelle (18) gerichtet und in einem gegenüber dem Träger (S) vorspringenden Ende der Hülse (40) ausgebildet ist.
  8. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß ist der Kopf (38) des Bolzens durch eine polygonale Kontur begrenzt ist, die dazu bestimmt ist, mit einem Werkzeug (39) mit komplementärer Form zusammenzuwirken.
  9. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß ist der Träger (S) Teil eines Zylinderkopfes (14) des Motors ist.
  10. Verfahren zum Einbau einer Vorrichtung nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß:
    zunächst, getrennt von dem Träger (S), das Abstützende (22A) des Auslösehebels auf dem Kugelgelenk-Ende (26A) des Stützorgans montiert wird und der Bolzen (34) so auf dem Kugelgelenk-Ende (26A) des Stützorgans befestigt wird, daß er leicht in bezug auf den Auslösehebel (22) positioniert werden kann, und
    man dann die Baugruppe aus Auslösehebel (22), Stützorgan (26) und Bolzen (34) an dem Träger (S) montiert, indem man das Stützorgan (26) in diesen Träger (S) einschraubt.
EP98400136A 1997-02-12 1998-01-22 Ventilantriebsvorrichtung in Brennkraftmaschine für Kraftfahrzeug und Verfahren zum Einbau dieser Vorrichtung Expired - Lifetime EP0859129B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9701619 1997-02-12
FR9701619 1997-02-12

Publications (2)

Publication Number Publication Date
EP0859129A1 EP0859129A1 (de) 1998-08-19
EP0859129B1 true EP0859129B1 (de) 2002-01-02

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EP98400136A Expired - Lifetime EP0859129B1 (de) 1997-02-12 1998-01-22 Ventilantriebsvorrichtung in Brennkraftmaschine für Kraftfahrzeug und Verfahren zum Einbau dieser Vorrichtung

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EP (1) EP0859129B1 (de)
AT (1) ATE211523T1 (de)
DE (1) DE69803319T2 (de)
ES (1) ES2170455T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2788810B1 (fr) * 1999-01-26 2001-03-02 Skf France Dispositif de culbuteur pour moteur a explosion
DE102005010750A1 (de) * 2005-03-09 2006-09-14 Schaeffler Kg Baueinheit eines Ventiltriebs einer Brennkraftmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2540220A1 (de) 1975-09-10 1977-03-24 Volkswagenwerk Ag Schwinghebel zur betaetigung der ventile von brennkraftmaschinen
DE19507240A1 (de) 1995-03-02 1996-09-05 Schaeffler Waelzlager Kg Abstützelement

Also Published As

Publication number Publication date
DE69803319D1 (de) 2002-02-28
EP0859129A1 (de) 1998-08-19
ES2170455T3 (es) 2002-08-01
DE69803319T2 (de) 2002-08-08
ATE211523T1 (de) 2002-01-15

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