EP1646768A1 - Element support hydraulique - Google Patents

Element support hydraulique

Info

Publication number
EP1646768A1
EP1646768A1 EP04735883A EP04735883A EP1646768A1 EP 1646768 A1 EP1646768 A1 EP 1646768A1 EP 04735883 A EP04735883 A EP 04735883A EP 04735883 A EP04735883 A EP 04735883A EP 1646768 A1 EP1646768 A1 EP 1646768A1
Authority
EP
European Patent Office
Prior art keywords
support element
pressure piston
element according
face
housing
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.)
Granted
Application number
EP04735883A
Other languages
German (de)
English (en)
Other versions
EP1646768B1 (fr
Inventor
Georg Hofmann
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.)
IHO Holding GmbH and Co KG
Original Assignee
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
Application filed by Schaeffler KG filed Critical Schaeffler KG
Publication of EP1646768A1 publication Critical patent/EP1646768A1/fr
Application granted granted Critical
Publication of EP1646768B1 publication Critical patent/EP1646768B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F01L1/20—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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a hydraulic support element for a valve train of an internal combustion engine, with a hollow cylindrical housing, in the bore of which axially movable a pressure piston extends beyond one edge of the housing and at the end at this end a head for mounting a rocker arm and at its end End facing away from the head has a check valve, a high-pressure space for hydraulic medium is generated between the opposite end and an opposite bottom of the housing, which high-pressure space can be supplied with the hydraulic medium from a storage space above the opposite end and enclosed by the pressure piston.
  • a generic support element is previously known from DE 197 06 738 A1. Its pressure piston also consists of an upper and lower part, the lower part having a hydraulic lash adjuster.
  • the manufacture of the upper part proves to be relatively complex. For example, an extrusion process with subsequent maintenance treatment and several grinding processes required.
  • the relatively short guide length of the upper part in the housing can also lead to undesired transverse forces.
  • the ring groove and the snap ring as a loss protection requires further construction and assembly work.
  • a so-called "flat lay” can occur with an undesired introduction of force into the support element.
  • the facing end faces of the upper and lower part are ground extremely precisely.
  • the aforementioned pressure piston is relatively solid and therefore still has optimization potential with regard to lightweight construction.
  • the object of the invention is therefore to provide a support element of the aforementioned type, in which the disadvantages cited are eliminated.
  • this object is achieved in that the pressure piston at its end projecting beyond the edge of the housing and at least one section adjoining it within the housing and extending into the vicinity of the check valve consists of plastic reinforced by glass or carbon fibers.
  • the pressure piston can be manufactured very easily and inexpensively, preferably by injection molding.
  • the guide length of the pressure piston in the bore of the housing increases significantly, so that the lateral rocker forces introduced can be better supported. This measure stems in particular from the smooth surface design of the upper part of the pressure piston at least within the bore of the housing. If the upper part of the pressure piston, as is the subject of a further subclaim, is extended with a shoulder into a bore of the lower part thereof, then this has an even greater guide length.
  • plastic is to be understood in particular as a substance that can be processed by injection molding, such. B. of organic origin or a so-called "plastic". It is also thought of die-cast aluminum or sintered metal.
  • reinforcing inserts which are further specified according to the claims, and further materials for storage are available to the person skilled in the art, make a considerable contribution to the protection against wear and the strength of the pressure piston.
  • wedge-like snap projections are molded onto an outer jacket of the pressure piston, expediently at its upper part. These find an upper stop on an annular shoulder of an annular groove in the bore of the housing. If necessary, the snap projections can also be designed as separate components. Is too it is conceivable to completely dispense with the snap projections and thus the aforementioned securing.
  • knobs advantageously have a relatively small contact area, so that a line or ball contact is made.
  • the person skilled in the art will design the knobs in such a way that the abovementioned plan stop is no longer or no longer significant.
  • the hydraulic medium can also pass into the reservoir through longitudinal slots arranged in the shoulder. Due to the longitudinal slots, the thermal expansion in the element is also compensated excellently.
  • a fixed connection to the lower part should be made via the approach.
  • An additional system is implemented using so-called connection knobs on the lower edge area.
  • the entire pressure piston caused by a compression spring in the high-pressure chamber, can perform a desired rotary movement about its longitudinal axis.
  • the axial extension of the pressure piston downwards creates an additionally improved introduction of the transverse forces.
  • the measures of the invention can equally be applied to so-called switchable and non-switchable support elements. Switchable support elements are to be understood in particular as those in which the pressure piston can optionally be connected to the housing via coupling means.
  • FIG. 1 shows a partial longitudinal section through a support element according to the invention
  • Figure 2 is a view of a pressure piston of the aforementioned support element
  • FIG. 3 shows a bottom view of the pressure piston according to FIG. 2.
  • FIG. 1 Shown in FIG. 1 is a hydraulic support element 1.
  • This has a hollow cylindrical housing 2.
  • a pressure piston 4 runs axially movably in a bore 3 of the housing 2.
  • This pressure piston 4 projects with its end 5 over an edge 6 of the housing 2.
  • the pressure piston has on the end side 4 a head 7.
  • a rocker arm can be mounted on this head 7.
  • an upper part 4a of the pressure piston 4 is made of plastic.
  • This plastic is expediently reinforced by glass or carbon fibers also has glass or carbon balls for further wear protection or to optimize stiffness.
  • An outer jacket 14 of the upper part 4a is formed with a completely smooth surface within the bore 3 of the housing 2.
  • the pressure piston 4 has an excellent overall guide length in the housing 2, as a result of which the tilting moment guided by the rocker arm into the support element 1 can be supported well.
  • the bore 3 of the housing 2 has an annular groove 16.
  • the upper part 4a strikes an upper side of this annular groove 16 via snap projections 15 which are distributed over the circumference and advantageously in one piece.
  • snap projections 15 are distributed over the circumference and advantageously in one piece.
  • the upper part 4a adjoins a facing end face 17 of a lower part 4b of the pressure piston 4 via a ring 18 formed by a reduction in the diameter of its outer casing 14.
  • the ring 18 has circumferentially distributed and, for example, plastically deformable knobs 19. Because of these knobs 19, an excellent contact surface is created in the contact area between the upper part 4a and the lower part 4b, so that the State of the art occurring "face impact errors" can be easily eliminated.
  • the reduction in diameter of the upper part 4a within a bore 21 of the lower part 4b is continued with a shoulder 22.
  • the upper part 4a runs non-rotatably in the bore 21 of the lower part 4b via the extension 22.
  • An additional connection of the upper part 4a to the lower part 4b takes place via connecting knobs 26 shown in FIG.
  • the thermal expansion can be compensated excellently via longitudinal slots 24 in the extension 22.
  • This hydraulic medium passage is fed from a high-pressure chamber 11.
  • This high-pressure chamber 11 lies axially between a bottom 25 of the lower part 4b and a facing bottom 10 of the housing 2. From there, the hydraulic medium becomes axially between the outer jacket 14 of the pressure piston during a high-pressure phase of the play compensation element 4 and the bore 3 of the housing 2 is pushed upward and passes through passages 20 between the knobs 19 into the longitudinal slots 24.
  • knobs 19 on the ring 18 of the upper part 4a crown-like openings or the like can also be applied for a hydraulic medium passage. If necessary, it is conceivable to arrange the knobs 19 or the like on the end face 17 of the lower part 4b.
  • the pressure piston 4 can also be produced in one piece from the plastic.
  • the pressure piston 4 or its upper part 4a is advantageously manufactured in an injection molding process. This is relatively inexpensive and there is no need for complex finishing measures such as the prior art cited in the introduction to the description. It is also conceivable to manufacture the pressure piston 4 by powder metallurgy or to take further wear protection measures such as suitable conditions in the area of its head 7. For example, aluminum die-cast or sintered metal is also intended for the material of the pressure piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Actuator (AREA)

Abstract

L'invention concerne un élément support hydraulique (1) pour la distribution d'un moteur à combustion interne. Cet élément comporte un carter (2) cylindrique creux, dans l'alésage (3) duquel se trouve un piston plongeur (4) en plastique renforcé de fibre de verre ou de fibre de carbone.
EP04735883A 2003-07-17 2004-06-03 Element support hydraulique Expired - Fee Related EP1646768B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10332362A DE10332362A1 (de) 2003-07-17 2003-07-17 Hydraulisches Abstützelement
PCT/EP2004/005976 WO2005017323A1 (fr) 2003-07-17 2004-06-03 Element support hydraulique

Publications (2)

Publication Number Publication Date
EP1646768A1 true EP1646768A1 (fr) 2006-04-19
EP1646768B1 EP1646768B1 (fr) 2006-11-02

Family

ID=33560166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04735883A Expired - Fee Related EP1646768B1 (fr) 2003-07-17 2004-06-03 Element support hydraulique

Country Status (4)

Country Link
US (1) US7261075B2 (fr)
EP (1) EP1646768B1 (fr)
DE (2) DE10332362A1 (fr)
WO (1) WO2005017323A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100071649A1 (en) * 2008-09-23 2010-03-25 Eaton Corporation Ball plunger for use in a hydraulic lash adjuster and method of making same
DE102009040607A1 (de) * 2009-09-08 2011-03-10 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für einen Ventiltrieb einer Brennkraftmaschine
DE102013204664A1 (de) 2013-03-18 2014-09-18 Schaeffler Technologies Gmbh & Co. Kg Hydraulisches Abstützelement
USD785047S1 (en) * 2014-07-26 2017-04-25 Eaton Corporation Pivot plunger
USD896842S1 (en) * 2015-11-23 2020-09-22 Innio Jenbacher Gmbh & Co Og Valve for engine

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228771A (en) * 1978-02-28 1980-10-21 Eaton Corporation Lash adjustment means for valve gear of an internal combustion engine
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
JP3362866B2 (ja) * 1992-04-06 2003-01-07 日産自動車株式会社 動弁装置およびバルブリフタ
US5361648A (en) * 1992-04-07 1994-11-08 Nsk Ltd. Rolling-sliding mechanical member
DE4234868C2 (de) * 1992-10-16 1999-10-28 Schaeffler Waelzlager Ohg Verfahren zur Herstellung eines Schlepp- oder Kipphebels
DE9319435U1 (de) * 1993-12-17 1994-02-10 INA Wälzlager Schaeffler KG, 91074 Herzogenaurach Schaltbares Abstützelement
DE4404145A1 (de) * 1994-02-09 1995-08-10 Schaeffler Waelzlager Kg Schalteinrichtung in einem Ventiltrieb
DE4442932A1 (de) 1994-12-02 1996-06-05 Schaeffler Waelzlager Kg Hydraulisches Spielausgleichselement für eine Ventilsteuerung einer Brennkraftmaschine
DE19500575A1 (de) * 1995-01-11 1996-07-18 Schaeffler Waelzlager Kg Schaltbares Abstützelement
DE19515434A1 (de) * 1995-04-27 1996-10-31 Schaeffler Waelzlager Kg Hydraulische Spielausgleichsvorrichtung
US5622147A (en) * 1996-03-08 1997-04-22 Eaton Corporation Hydraulic lash adjuster
DE19706738B4 (de) 1997-02-20 2014-09-11 Schaeffler Technologies Gmbh & Co. Kg Hydraulisches Abstützelement für eine Verbrennungskraftmaschine
US5901676A (en) * 1997-08-28 1999-05-11 Eaton Corporation Hydraulic lash compensator
US5862785A (en) * 1998-01-26 1999-01-26 Eaton Corporation Hydraulic lash adjuster and improved oil flow path therefor
US5862784A (en) * 1998-05-01 1999-01-26 Eaton Corporation Hydraulic lash adjuster and check valve opening arrangement therefor
DE19830427A1 (de) 1998-07-08 2000-01-13 Schaeffler Waelzlager Ohg Schlepphebel für einen Ventiltrieb einer Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005017323A1 *

Also Published As

Publication number Publication date
EP1646768B1 (fr) 2006-11-02
US20060137638A1 (en) 2006-06-29
US7261075B2 (en) 2007-08-28
WO2005017323A1 (fr) 2005-02-24
DE502004001919D1 (de) 2006-12-14
DE10332362A1 (de) 2005-02-03

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