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WO2003067037A1 - Element de couplage pour un ensemble soupape d'un moteur a combustion interne - Google Patents

Element de couplage pour un ensemble soupape d'un moteur a combustion interne Download PDF

Info

Publication number
WO2003067037A1
WO2003067037A1 PCT/EP2002/014431 EP0214431W WO03067037A1 WO 2003067037 A1 WO2003067037 A1 WO 2003067037A1 EP 0214431 W EP0214431 W EP 0214431W WO 03067037 A1 WO03067037 A1 WO 03067037A1
Authority
WO
WIPO (PCT)
Prior art keywords
pistons
switching element
bore
inner element
receptacle
Prior art date
Application number
PCT/EP2002/014431
Other languages
German (de)
English (en)
Inventor
Norbert Geyer
Peter Sailer
Oliver Schnell
Original Assignee
Ina-Schaeffler Kg
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
Priority claimed from DE10204673A external-priority patent/DE10204673A1/de
Application filed by Ina-Schaeffler Kg filed Critical Ina-Schaeffler Kg
Priority to CA2479264A priority Critical patent/CA2479264C/fr
Priority to AU2002358742A priority patent/AU2002358742A1/en
Publication of WO2003067037A1 publication Critical patent/WO2003067037A1/fr
Priority to US10/900,615 priority patent/US20050005884A1/en

Links

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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0031—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of tappet or pushrod length
    • 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
    • F01L1/146—Push-rods
    • 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
    • F01L1/245—Hydraulic tappets
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a switching element for a valve train of an internal combustion engine, preferably for valve shutdown, with an outer part and an inner element axially movable in its bore, the outer part and the inner element in an axially distant relative position achieved by a lost motion spring at least one relative to the other have aligned receptacle and in one of the receptacles movable coupling means for coupling the inner element to the outer part are applied in the relative position to each other.
  • Such a switching element here designed as a cam follower in a push rod drive, is previously known from DE 199 15 531. It is disadvantageous in this case that only a piston is provided as the coupling means. It is clear to the person skilled in the art that there is an increased component load in the coupling area due to the one-piston coupling. There is also a relatively high risk of tipping over of the inner element opposite the outer part. It is also disadvantageous that a bore is provided as the receptacle into which the piston enters as a coupling means. Due to the special penetration of the body, an extremely undesirable edge load can occur if the coupling agent is insufficiently extended.
  • the object of the invention is therefore to provide a switching element of the aforementioned type, in which the disadvantages cited are eliminated with simple means.
  • this object is achieved in that two pistons are provided as coupling means, which run in the receptacle of the inner element designed as a radial bore and are diametrically opposed there, the receptacle of the outer part being made as an annular groove in its bore and the pistons on their underside remote from the cam , starting from its radially outer end face, in sections have a flat transverse face as a contact area to a facing annular face of the annular groove, and the pistons are guided in the inner element via an anti-rotation device.
  • the pistons have a flat transverse surface on their underside as a contact area to the annular groove, so that the surface pressure is drastically reduced here.
  • the cam stroke can be very large load-bearing surfaces to transfer to the inner part.
  • more than two coupling means can also be arranged in the inner element, preferably these should then be distributed symmetrically.
  • the pistons are fixed with respect to their receptacle by a simple anti-rotation device.
  • the invention contemplates, for example, a snap ring surrounding the inner element, on which the transverse surface of the pistons rests in the receiving area.
  • the pistons themselves can also be secured against rotation by flats or tongue-and-groove configurations.
  • the radial bore in the inner element is preferably made as a through bore.
  • a stepped or staged training is also conceivable, so that the aforementioned snap ring or a similar means can be dispensed with.
  • the radially outer end face of the pistons at least in the edge region to the transverse surface, has a curvature correlating to the bore of the inner element. This means that even when the pistons are passed over the smallest amount in the annular groove of the outer part, a good carrying area is created.
  • a further particularly preferred embodiment of the invention relates to the fact that an end face of the pistons connecting the transverse surface to the underside has a curvature correlating with the bore of the inner element or is chamfered like a roof. It is therefore clear that these simple measures allow the pistons to extend radially very far into the ring groove in the coupling case and thus result in an excellent contact pattern.
  • the scope of this invention expressly relates to all types of switching elements in valve drives, such as cam followers in push rod drives, support elements for rocker arms, bucket tappets, etc.
  • FIG. 2 shows a partial longitudinal section according to FIG. 1 rotated by 90 °
  • FIG. 3 shows a partial longitudinal section similar to FIG. 2,
  • FIG. 4 shows a bottom view of a piston as coupling means
  • Figure 5 shows the piston in cross section
  • Figures 1-3 disclose a switching element 1 for a valve train of an internal combustion engine.
  • This is designed as a roller tappet for a tappet rod drive. It consists of an outer part 2, in the bore 3 of which an axially movable inner element 5 runs with its outer jacket 4.
  • the outer part 2 and the inner element 5 are urged away from one another by a lost motion spring 6, which is not to be explained in more detail.
  • the receptacles 7, 8 are aligned with one another.
  • the receptacle 7 of the outer part 2 is made as a circumferential annular groove.
  • the receptacle 8 in the inner element 5, on the other hand, is made as a radial through hole.
  • a bowstring-like or skewed course is also conceivable.
  • Two diametrically opposite coupling means 9 are arranged in the receptacle 8 of the inner element 5. These are designed here as pistons 10 and are urged away from one another by a pressure spring means 11. A stop 12 for the pistons 10 is created in the center of the receptacle 8. This is designed as a ring part like a snap ring. Thus, in a decoupling position, the piston 10 is always guaranteed its central position and thus the same travel.
  • the coupling opening in the outer part 2 is circumferential, which has advantages in terms of production technology, for example.
  • the end face 13 of the pistons 10, as shown in FIG. 4, can be curved, as can the bore 3 of the outer part 2.
  • a good contact pattern occurs immediately after the pistons 10 are inserted into the annular groove 16. So-called edge supports are effectively avoided.
  • FIG. 3 shows an alternative measure of the central stop 12 for the
  • Piston 10 This is designed here as a pin 21 projecting orthogonally into the receptacle 8 of the inner element 5 designed as a radial bore.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un élément de couplage (1) pour un ensemble soupape d'un moteur à combustion interne, de préférence pour le désaccouplement de soupapes. L'élément de couplage selon l'invention comprend une partie extérieure (2) dans l'alésage (3) de laquelle un élément intérieur (5) est déplaçable axialement. La partie extérieure (2) et l'élément intérieur (5) possèdent chacun au moins un logement (7, 8), alignés l'un sur l'autre, dans une position relative éloignée axialement, obtenue par un ressort à perte de mouvement (6). Dans un des logements, des moyens de couplage (9), mobiles en direction de l'autre logement et servant au couplage de l'élément intérieur (5) avec la partie extérieure (2), sont appliqués l'un contre l'autre dans la position relative. Selon l'invention, on utilise comme moyens de couplage (9) deux pistons (10) qui s'étendent dans le logement (8), réalisé sous forme d'alésage radial, de l'élément intérieur (5) et y sont diamétralement opposés l'un à l'autre. Le logement (7) de la partie extérieure (2) est réalisé sous forme de rainure annulaire (16) dans l'alésage (3) de la partie extérieure et les pistons (10) présentent, par sections, une surface transversale plane (14) sur leur face inférieure (17) éloignée des cames en partant de leur surface frontale radialement extérieure (13), cette surface transversale plane servant de zone de contact avec une surface annulaire (15), faisant face, de la rainure annulaire (16). Les pistons (10) sont guidés dans l'élément intérieur (5) par l'intermédiaire d'une butée de torsion (19). On obtient ainsi un élément de couplage (1) possédant un mécanisme de couplage de réalisation simple qui ne génère qu'une faible sollicitation des composants.
PCT/EP2002/014431 2002-02-06 2002-12-18 Element de couplage pour un ensemble soupape d'un moteur a combustion interne WO2003067037A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA2479264A CA2479264C (fr) 2002-02-06 2002-12-18 Element de commutation pour systeme d'entrainement de soupapes de moteur a combustion interne
AU2002358742A AU2002358742A1 (en) 2002-02-06 2002-12-18 Switching element for a valve gear of an internal combustion engine
US10/900,615 US20050005884A1 (en) 2002-02-06 2004-07-28 Switching element for a valve drive of an internal combustion engine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US35463002P 2002-02-06 2002-02-06
US60/354,630 2002-02-06
DE10204673.5 2002-02-06
DE10204673A DE10204673A1 (de) 2002-02-06 2002-02-06 Schaltelement für einen Ventiltrieb einer Brennkraftmaschine

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/900,615 Continuation US20050005884A1 (en) 2002-02-06 2004-07-28 Switching element for a valve drive of an internal combustion engine

Publications (1)

Publication Number Publication Date
WO2003067037A1 true WO2003067037A1 (fr) 2003-08-14

Family

ID=27735652

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/014431 WO2003067037A1 (fr) 2002-02-06 2002-12-18 Element de couplage pour un ensemble soupape d'un moteur a combustion interne

Country Status (3)

Country Link
AU (1) AU2002358742A1 (fr)
CA (1) CA2479264C (fr)
WO (1) WO2003067037A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008122477A1 (fr) * 2007-04-05 2008-10-16 Schaeffler Kg Élément de distribution couplable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19915531A1 (de) 1999-04-07 2000-10-12 Schaeffler Waelzlager Ohg Nockenfolger oder Abstützelement für einen Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
EP1149989A1 (fr) * 2000-03-23 2001-10-31 Eaton Corporation Désactivation d'une soupape avec un ergot de verrouillage hydraulique
US20020014217A1 (en) * 1999-02-23 2002-02-07 Church Kynan L. Hydraulically actuated latching pin valve deactivation
US20020046718A1 (en) * 2000-10-20 2002-04-25 Spath Mark J. Deactivation roller hydraulic valve lifter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020014217A1 (en) * 1999-02-23 2002-02-07 Church Kynan L. Hydraulically actuated latching pin valve deactivation
DE19915531A1 (de) 1999-04-07 2000-10-12 Schaeffler Waelzlager Ohg Nockenfolger oder Abstützelement für einen Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
EP1149989A1 (fr) * 2000-03-23 2001-10-31 Eaton Corporation Désactivation d'une soupape avec un ergot de verrouillage hydraulique
US20020046718A1 (en) * 2000-10-20 2002-04-25 Spath Mark J. Deactivation roller hydraulic valve lifter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008122477A1 (fr) * 2007-04-05 2008-10-16 Schaeffler Kg Élément de distribution couplable
KR101465280B1 (ko) 2007-04-05 2014-11-26 섀플러 홀딩 게엠베하 운트 코. 카게 스위칭 가능한 밸브 트레인 부품

Also Published As

Publication number Publication date
CA2479264A1 (fr) 2003-08-14
CA2479264C (fr) 2010-06-29
AU2002358742A1 (en) 2003-09-02

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