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WO2003042511A1 - Basculeur d'un mecanisme de distribution d'un moteur a combustion interne - Google Patents

Basculeur d'un mecanisme de distribution d'un moteur a combustion interne Download PDF

Info

Publication number
WO2003042511A1
WO2003042511A1 PCT/EP2002/011943 EP0211943W WO03042511A1 WO 2003042511 A1 WO2003042511 A1 WO 2003042511A1 EP 0211943 W EP0211943 W EP 0211943W WO 03042511 A1 WO03042511 A1 WO 03042511A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
rocker arm
valve train
inner lever
rocker
Prior art date
Application number
PCT/EP2002/011943
Other languages
German (de)
English (en)
Inventor
Michael Haas
Martin Rauch
Bodo RÖRIG
Dieter Schmidt
Jens Artmann
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 DE10155800A external-priority patent/DE10155800A1/de
Application filed by Ina-Schaeffler Kg filed Critical Ina-Schaeffler Kg
Publication of WO2003042511A1 publication Critical patent/WO2003042511A1/fr
Priority to US10/841,138 priority Critical patent/US6901894B2/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
    • 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
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • 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
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a rocker arm of a valve train of an internal combustion engine, which can be switched over to different valve strokes for at least one gas exchange valve, with an outer lever, between the arms of which an inner lever which is relatively pivotable relative to this is positioned and both levers can be coupled to one another via coupling means, the outer lever being at its a closed end has a system for a gas exchange valve and the rocker arm at the opposite end has a complementary surface for a support element and the inner lever has its pivot center on the side of the opposite end and at least this inner lever has a contact surface for a cam.
  • Such a switchable rocker arm is known from DE-OS 27 53 197.
  • This also consists of an outer lever, which includes an inner lever that is pivotable relative to this.
  • a pawl is provided as the coupling means.
  • the finger lever which is considered to be of the generic type, that it is relatively high.
  • the latch mechanism has a complicated structure and requires a comparatively complex external application. Thus, installation of this rocker arm can lead to installation space problems u. come.
  • SAE TECHNICAL PAPER 2000-01-0670 “Development of the High Power, Low-Emission Engine for the Hyundai S2000"
  • a switchable lever drive emerges, which is manufactured here as a rocker arm drive and each has equivalent gas exchange valves per Cylinder consists of a total of three axially adjacent lever arms, which can be coupled to one another via axially displaceable sliders.
  • the object of the invention is therefore to provide a rocker arm of the aforementioned type in which the disadvantages mentioned above are eliminated. In particular, it should be very compact and easy to load.
  • this object is achieved in that the outer lever is made largely fork-like open, the contact surface for the cam on the inner lever is designed as a rotatable roller and the coupling means are one or more sliders extending transversely to the longitudinal direction of the rocker arm, the axial line of which has an axial line for the roller collapses and the pivot center of the inner lever is at least approximately on the same length of the rocker arm as a pivot center of the outer lever in the area of its complementary surface.
  • a rotatable roller should be provided as the contact surface for the cam. This is preferably roller-bearing. If necessary, a sliding tap can also be used. Pistons or pins are particularly intended as sliders. Due to the arrangement of the slider on the axis for the role, another contribution towards compact design is made. In addition, there is no need for separate measures for arranging the slides. If necessary, the slides can also be positioned outside the axis for the roller. However, if these are moved in the direction of the swivel centers, higher loads may have to be expected.
  • a slider package is preferably proposed, consisting of three sliders axially lined up.
  • a shift in one direction is to be accomplished via the force of a mechanical means such as a compression spring.
  • a shift of the slide assembly in the opposite direction can be accomplished by the force of an external application means such as an actuator of an electromagnet.
  • an external application means such as an actuator of an electromagnet.
  • a large number of servo means for displacing the slide package are conceivable, for example also hydraulic, magnetic, pneumatic and the like.
  • the compression spring can also be dispensed with and the slide assembly can be displaced in both directions by the force of one or more of the aforementioned servo means.
  • the bushings in the outer lever for the second or third slide can be excellently finished externally and then fastened in the outer lever using suggested fastening measures such as pressing, caulking or gluing. If necessary, however, these bushings can be dispensed with, so that the corresponding slides run directly in receptacles of the outer lever. The same applies to the inner lever.
  • an external application means such as an electromagnet
  • lever parts can consist of a lightweight material such as sheet metal or a composite material.
  • rocker arm If the rocker arm is mounted on a hydraulic support element, its lost-motion mode (decoupling mode) can cause it to “inflate” unnecessarily under the influence of the hydraulic fluid pressure, ie it moves apart in the axial direction.
  • appropriate stops are provided on the outer lever, which consist of two raised counter surfaces that communicate with the camshafts of the camshaft, which are not described in detail. If necessary, other stops, such as those originating from the cylinder head, can also be applied.
  • a dome or cylinder surface is provided as a complementary surface for mounting the rocker arm on the support element. It is proposed to provide the outer lever with the spherical cap and to support the inner lever in a simply pivotable manner on an upper side of the corresponding spherical cap. However, it is also conceivable to mount the inner lever on the support element and accordingly to support the outer lever with a counter surface on the top of the calotte of the inner lever. Finally, simple connection measures of the outer lever with the inner lever are proposed. For example, the inner lever on the calotte side can have two laterally projecting stub axles on which the outer lever is supported with corresponding bearing eyes. Instead of the bearing eyes, holes can also be provided.
  • the outer lever run a continuous axis on which the inner lever is pivotally mounted.
  • the corresponding axis can be positioned in the inner lever, on the projecting ends of which the outer lever is fastened with bearing eyes or bores.
  • Figure 1 in a spatial representation a view of a finger lever according to the invention
  • Figure 2 shows a cross section through the rocker arm according to Figure 1 in the region of its roller axis
  • Figure 3 is a central longitudinal section through the rocker arm of Figure 1 and
  • the rocker arm 1 is shown in FIG. This consists of a fork-shaped outer lever 2 with two arms 3a, b. Between Arms 3a, b, an inner lever 4 is pivotally received. At its closed end 5 (underside), the outer lever 2 acts on one end of a gas exchange valve, not shown in the drawing. At the opposite end 6, the outer lever 2 has a spherical complementary surface 7 (see also FIG. 3). About this, the rocker arm 1 is supported on a head of a support element, not shown, preferably of a hydraulic type. A support 9 for the inner lever 4 is formed on an upper side 8 of the calotte. This is thus pivotally supported on the support 9 with its pivot center 10.
  • this Approximately in the area of a transverse center plane of the rocker arm 1, this has a contact surface 11 for a cam (see FIG. 2).
  • the contact surface 11 is here produced as a roller 12 and is accommodated on a side of the inner lever 4 facing the end 5, between its arms 13a, b.
  • the aforementioned roller 12 is arranged on a hollow pin 14, which runs in a floating or fixed manner in the arms 13a, b.
  • a first slide 16 is positioned in the hollow pin 14 as a component of coupling means 15. This has a length of the hollow pin 14 and, in the decoupled state of the rocker arm 1, runs centrally in the hollow pin 14.
  • Both ends 17a, b of the hollow pin 14 lie in the coupled state or in the case of a cam base cycle, the ends 17c, d of bush-like receptacles 18a, b across from.
  • a second slide 19 runs in the receptacle 18a and adjoins an outer side 21 of the first slide 16 with its axially inner end face 20.
  • the inner end face 20 of the second slide 19 is in alignment with the end face 17c of its receptacle 18a.
  • a third slide 22 is diametrically opposite the second slide 19 in the receptacle 18b. Its inner face 23 bears against an outer face 24 of the first slide 16 in the coupling case, the inner face 23 in the case of decoupling is again in alignment with the end face 17d of the corresponding receptacle 18b.
  • the third slide 22 is led axially out of the receptacle 18b, its outer end face 25 serving as a contact surface for an external application means such as an actuator of an electromagnet or the like.
  • a displacement of the entire slide assembly 19, 16, 22 against the force of the aforementioned actuator is accomplished here via the force of a spring means 26 which acts on an axially outer end face 27 of the second slide 19.
  • the entire mechanism is thus shown locked in a depressurized state.
  • FIG. 1 discloses that an upper side of the outer lever 2 facing the cam has raised counter-running surfaces 29a, b in the region of its arms 3a, b. These communicate with a base circle cam and, as described in the introduction to the description, prevent the hydraulic support element used from being "inflated” when the rocker arm 1 is uncoupled. If necessary, these counter-running surfaces 29a, b can also be designed as contact surfaces for small-lift cams.
  • FIG. 4 shows an expedient form of connection of the outer lever with the inner lever 2, 4.
  • the inner lever 4 has a complementary surface 30 for storage on the end of the support element. Furthermore, it has two axially projecting stub axles 31a, b, on which the arms 3a, b of the outer lever 2 are supported, each with a bearing eye 32a, b.
  • FIG. 5 shows a rocker arm 1 as mentioned above, but the outer lever 2 is not mounted on the stub axles 31a, b via bores 33a, b, but via bores 33a, b. If necessary, a continuous axis can also be applied, as explained in more detail above.
  • Inner lever 35 31 a, b stub axle

Landscapes

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

Abstract

L'invention concerne un basculeur (1) d'un mécanisme de distribution d'un moteur à combustion interne pouvant être commuté sur différentes levées de soupape pour au moins une soupape de changement des gaz. Ce basculeur comprend un levier extérieur (2) pourvu, entre ses bras (3a, b), d'un levier intérieur (4) placé de manière à pouvoir pivoter par rapport audit levier extérieur. Ces deux leviers (2, 4) peuvent être accouplés l'un à l'autre par l'intermédiaire de moyens d'accouplement (15). Le levier extérieur (2) comprend, au niveau de son extrémité fermée (5), une zone d'appui (5a) conçue pour une soupape de changement des gaz. Le basculeur (1) comprend, au niveau de l'extrémité opposée (6), une surface complémentaire (7, 30) conçue pour un élément d'appui. Le centre de pivotement (10) du levier intérieur (4) se situe sur le côté de l'extrémité opposée (6). De plus, ce levier intérieur (4) comprend au moins une surface d'appui (11) conçue pour une came. Selon l'invention, le levier extérieur (2) est produit de façon ouverte et présente le plus possible la forme d'une fourche, la surface d'appui (11) conçue pour la came sur le levier intérieur (4) se présente sous la forme d'un galet rotatif (12), et les moyens d'accouplement (15) se présentent sous la forme d'un ou de plusieurs coulisseaux s'étendant transversalement à la direction longitudinale du basculeur (1) et dont la ligne axiale coïncide avec une ligne axiale du galet (12). Le centre de pivotement (10) du levier intérieur (4) se trouve au moins approximativement sur une même section longitudinale du basculeur (1) qu'un centre de pivotement du levier extérieur (2) dans ladite zone de surface complémentaire (7). Le basculeur (1) commutable nécessite un espace d'installation très réduit et comporte un mécanisme de couplage intégré de manière relativement simple.
PCT/EP2002/011943 2001-11-14 2002-10-25 Basculeur d'un mecanisme de distribution d'un moteur a combustion interne WO2003042511A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/841,138 US6901894B2 (en) 2001-11-14 2004-05-07 Finger lever of a valve train of an internal combustion engine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10155800.7 2001-11-14
DE10155800A DE10155800A1 (de) 2001-11-14 2001-11-14 Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
US335601P 2001-11-15 2001-11-15
US60/335,601 2001-11-15

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US10841138 A-371-Of-International 2002-10-25
US10/841,138 Continuation US6901894B2 (en) 2001-11-14 2004-05-07 Finger lever of a valve train of an internal combustion engine
US11/043,254 Division US6948466B2 (en) 2001-11-14 2005-01-26 Finger lever of a valve train of an internal combustion engine

Publications (1)

Publication Number Publication Date
WO2003042511A1 true WO2003042511A1 (fr) 2003-05-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/011943 WO2003042511A1 (fr) 2001-11-14 2002-10-25 Basculeur d'un mecanisme de distribution d'un moteur a combustion interne

Country Status (1)

Country Link
WO (1) WO2003042511A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418359A1 (fr) * 2010-08-13 2012-02-15 Eaton Corporation Culbuteur désactivant à lobe unique
EP3124759A1 (fr) * 2015-07-30 2017-02-01 Aktiebolaget SKF Dispositif à rouleaux, broche pour une utilisation dans un dispositif à rouleaux et procédé de verrouillage d'une broche
CN107956529A (zh) * 2016-10-18 2018-04-24 舍弗勒技术股份两合公司 可变气门传动装置的中间杠杆
DE102023131238A1 (de) * 2023-11-10 2025-05-15 Schaeffler Technologies AG & Co. KG Schaltbarer Motorbremskipphebel für einen Ventiltrieb einer Schwerlastbrennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2753197A1 (de) 1976-12-15 1978-06-22 Eaton Corp Ventilsteuervorrichtung
EP0267696A1 (fr) * 1986-10-15 1988-05-18 Honda Giken Kogyo Kabushiki Kaisha Dispositif de commande de soupape dans un moteur à combustion interne
US5239952A (en) * 1991-11-08 1993-08-31 Atsugi Unisia Corporation Valve actuating apparatus
US6321705B1 (en) * 1999-10-15 2001-11-27 Delphi Technologies, Inc. Roller finger follower for valve deactivation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2753197A1 (de) 1976-12-15 1978-06-22 Eaton Corp Ventilsteuervorrichtung
EP0267696A1 (fr) * 1986-10-15 1988-05-18 Honda Giken Kogyo Kabushiki Kaisha Dispositif de commande de soupape dans un moteur à combustion interne
US5239952A (en) * 1991-11-08 1993-08-31 Atsugi Unisia Corporation Valve actuating apparatus
US6321705B1 (en) * 1999-10-15 2001-11-27 Delphi Technologies, Inc. Roller finger follower for valve deactivation

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418359A1 (fr) * 2010-08-13 2012-02-15 Eaton Corporation Culbuteur désactivant à lobe unique
CN102373979A (zh) * 2010-08-13 2012-03-14 伊顿公司 单凸轮桃的停闭摇臂
US8635980B2 (en) 2010-08-13 2014-01-28 Eaton Corporation Single lobe deactivating rocker arm
US9140148B2 (en) 2010-08-13 2015-09-22 Eaton Corporation Single lobe deactivating rocker arm
US10107156B2 (en) 2010-08-13 2018-10-23 Eaton Corporation Single lobe deactivating rocker arm
US10968787B2 (en) 2010-08-13 2021-04-06 Eaton Corporation Single lobe deactivating rocker arm
EP3124759A1 (fr) * 2015-07-30 2017-02-01 Aktiebolaget SKF Dispositif à rouleaux, broche pour une utilisation dans un dispositif à rouleaux et procédé de verrouillage d'une broche
CN107956529A (zh) * 2016-10-18 2018-04-24 舍弗勒技术股份两合公司 可变气门传动装置的中间杠杆
CN107956529B (zh) * 2016-10-18 2021-08-24 舍弗勒技术股份两合公司 可变气门传动装置的中间杠杆
DE102023131238A1 (de) * 2023-11-10 2025-05-15 Schaeffler Technologies AG & Co. KG Schaltbarer Motorbremskipphebel für einen Ventiltrieb einer Schwerlastbrennkraftmaschine

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