EP1446562A1 - Levier d'entrainement d'un mecanisme de distribution d'un moteur a combustion interne - Google Patents

Levier d'entrainement d'un mecanisme de distribution d'un moteur a combustion interne

Info

Publication number
EP1446562A1
EP1446562A1 EP02802982A EP02802982A EP1446562A1 EP 1446562 A1 EP1446562 A1 EP 1446562A1 EP 02802982 A EP02802982 A EP 02802982A EP 02802982 A EP02802982 A EP 02802982A EP 1446562 A1 EP1446562 A1 EP 1446562A1
Authority
EP
European Patent Office
Prior art keywords
lever
rocker arm
inner lever
cam
valve
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.)
Ceased
Application number
EP02802982A
Other languages
German (de)
English (en)
Inventor
Jens Artmann
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.)
Artmann Jens
IHO Holding GmbH and Co KG
Original Assignee
Artmann Jens
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 DE10155825A external-priority patent/DE10155825A1/de
Application filed by Artmann Jens, INA Schaeffler KG filed Critical Artmann Jens
Publication of EP1446562A1 publication Critical patent/EP1446562A1/fr
Ceased legal-status Critical Current

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
    • F01L1/185—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
    • F01L1/12—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
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • a generic rocker arm is previously known from DE-OS 27 53 197.
  • the inner lever communicates with a large stroke cam and the outer lever communicates with a small stroke cam pair.
  • Sliding taps are provided as cam taps. It is disadvantageous in this prior art that the sliding taps unnecessarily increase the valve train friction.
  • Sliders which are not explained in more detail, are provided as coupling means, which can be displaced, for example hydraulically or electromagnetically or via compression spring force, in at least one axial direction.
  • coupling means which can be displaced, for example hydraulically or electromagnetically or via compression spring force, in at least one axial direction.
  • the slides can also run outside of an axial line for the roller.
  • other coupling means such as jack-like and ball-like and similar are also conceivable.
  • the inner lever on the side of one end with its abutment should clearly project beyond an end face of the outer lever in this area.
  • the outer lever is therefore only as long as absolutely necessary. This reduces the mass and the overall construction effort on the rocker arm.
  • a simple connection of the inner lever to the outer lever is the subject of a further subclaim.
  • a bolt or a similar component extends through the inner lever in the area of the opposite end, on which the arms are pivotably mounted on the outer lever.
  • At least one torsion spring is expediently positioned as a lost motion spring in the area of this bolt. This is supported at one end on a crossbar connecting the arms of the outer lever and acts at the other end on a stop of the inner lever, which is designed, for example, as a pin, which is located on an outer wall of the inner lever. If necessary, other lost motion springs such as coil springs and the like can also be applied.
  • the outer lever can also be mounted on the inner lever in some other way. Here, for example, dome-shaped supports or fork-like interventions are intended.
  • lever parts is made from a lightweight material such as sheet metal or fiber-reinforced plastic, a further contribution is made with regard to lightweight construction and reduction of the oscillating valve train masses.
  • Figure 1 shows a spatial view of the towing device according to the invention
  • Figure 2 is a plan view of the rocker arm of Figure 1;
  • Figure 3 shows a section along the section line III-III of Figure 2 and
  • Figure 1 discloses the rocker arm 1 according to the invention in a spatial representation.
  • This consists of an outer lever 2 with two arms 3a, 3b. These are connected in the region of an (opposite) end 4 of the rocker arm 1 by a crossbar 5 on the cam side.
  • An inner lever 6 runs between the arms 3a, 3b so as to be pivotable to the outer lever 2.
  • This has an installation 8 in the region of one end 7 for a gas exchange valve (see also other figures).
  • the inner lever 6 has a complementary surface 9 on an underside for bearing on a head of a preferably hydraulic support element.

Landscapes

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

Abstract

L'invention concerne un levier d'entraînement (1) d'un mécanisme de distribution d'un moteur à combustion interne qui peut être réglé de façon à faire effectuer différentes courses de levée à au moins une soupape d'échange de gaz, qui comprend un levier extérieur (2), entre les bras (3a, 3b) duquel est placé un levier intérieur (6) pouvant effectuer un mouvement de basculement par rapport audit levier extérieur (2), le levier extérieur et le levier intérieur (2, 6) pouvant être accouplés l'un à l'autre par l'intermédiaire de moyens d'accouplement (15) de telle sorte que, lorsqu'ils sont accouplés, la course de levée de soupape est plus grande, et que, lorsqu'ils sont désaccouplés, la course de levée de soupape est plus petite. Le levier d'entraînement (1) comporte, à une extrémité (7), une zone d'appui (8) destinée à une soupape d'échange de gaz, et, à l'extrémité (4) opposée, une face complémentaire (9) destinée à un élément d'appui, ainsi qu'au moins sur un des leviers (2, 6), une surface de contact (14) destinée à une came. Selon l'invention, le levier extérieur est conçu pour la transmission d'une grande course de came et le levier intérieur (6) est conçu pour la transmission d'une plus petite course de came, seul le levier intérieur (6) comportant un galet tournant en tant que surface de contact (14) et chacun des bras (3a, 3b) du levier extérieur (2) comportant une partie de glissement comme surface de contact. On obtient ainsi un levier d'entraînement (1) pouvant être commandé, dont seule la partie levier comporte un galet en tant que surface de contact (14) destinée à une came, cette partie levier étant principalement en fonction pendant le fonctionnement du moteur à combustion interne. Dans ce cas, cette partie levier est le levier intérieur (6).
EP02802982A 2001-11-14 2002-10-22 Levier d'entrainement d'un mecanisme de distribution d'un moteur a combustion interne Ceased EP1446562A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10155825 2001-11-14
DE10155825A DE10155825A1 (de) 2001-11-14 2001-11-14 Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
US33562401P 2001-11-15 2001-11-15
US335624P 2001-11-15
PCT/EP2002/011774 WO2003042510A1 (fr) 2001-11-14 2002-10-22 Levier d'entrainement d'un mecanisme de distribution d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1446562A1 true EP1446562A1 (fr) 2004-08-18

Family

ID=26010577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02802982A Ceased EP1446562A1 (fr) 2001-11-14 2002-10-22 Levier d'entrainement d'un mecanisme de distribution d'un moteur a combustion interne

Country Status (3)

Country Link
EP (1) EP1446562A1 (fr)
BR (1) BR0206425A (fr)
WO (1) WO2003042510A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101161995B (zh) * 2006-10-10 2011-07-20 现代自动车株式会社 车辆的可变气门升程从动件

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007526423A (ja) * 2004-03-03 2007-09-13 ティムケン ユーエス コーポレーション 切換え式フィンガ従動子アセンブリ
CN100422513C (zh) * 2004-03-03 2008-10-01 蒂姆肯公司 可切换的指状随动件组件
DE102006051256A1 (de) * 2006-10-31 2008-05-08 Schaeffler Kg Ventiltriebs-Hebel für eine Brennkraftmaschine
US10605126B2 (en) 2018-04-17 2020-03-31 Delphi Technologies Ip Limited Switchable rocker arm
US10704429B2 (en) 2018-09-27 2020-07-07 Delphi Technologies Ip Limited Switchable rocker arm

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199894B (en) * 1987-01-08 1990-10-24 Honda Motor Co Ltd Valve operating device in internal combustion engine
JPH0396607A (ja) * 1989-09-08 1991-04-22 Nissan Motor Co Ltd エンジンの弁作動装置
DE19930574A1 (de) * 1999-07-02 2001-01-04 Schaeffler Waelzlager Ohg Ventiltrieb einer Brennkraftmaschine
EP1149988B1 (fr) * 2000-04-26 2005-11-02 Delphi Technologies, Inc. Procédé et dispositif pour le changement du profil d'une came en deux étapes
US6314928B1 (en) * 2000-12-06 2001-11-13 Ford Global Technologies, Inc. Rocker arm assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03042510A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101161995B (zh) * 2006-10-10 2011-07-20 现代自动车株式会社 车辆的可变气门升程从动件

Also Published As

Publication number Publication date
BR0206425A (pt) 2003-12-30
WO2003042510A1 (fr) 2003-05-22

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