EP2643564A1 - Pressure accumulator of a hydraulic actuating system - Google Patents

Pressure accumulator of a hydraulic actuating system

Info

Publication number
EP2643564A1
EP2643564A1 EP11732415.2A EP11732415A EP2643564A1 EP 2643564 A1 EP2643564 A1 EP 2643564A1 EP 11732415 A EP11732415 A EP 11732415A EP 2643564 A1 EP2643564 A1 EP 2643564A1
Authority
EP
European Patent Office
Prior art keywords
actuating system
hydraulic actuating
piston
federabstützblech
designed
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.)
Withdrawn
Application number
EP11732415.2A
Other languages
German (de)
French (fr)
Inventor
Andreas Rinnert
Robert Seeger
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co 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 Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2643564A1 publication Critical patent/EP2643564A1/en
Withdrawn legal-status Critical Current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
    • F01L1/02—Valve drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
    • F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
    • F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons

Definitions

  • the invention relates to a hydraulic actuation system, in particular for gas exchange valves of reciprocating internal combustion engines, with a pressure source for the hydraulic medium and at least one connectable to the pressure source pressure accumulator, a displaceable in a bore piston, a compression spring and a means of a spring ring fixed support member for the compression spring having a central opening.
  • a control block which is attached to a cylinder head of the reciprocating internal combustion engine, having a pressure source for the hydraulic medium, includes a pressure accumulator and having an actuating device.
  • the pressure accumulator has a designed as a steel bushing piston, which is movably guided in a bore in the control block made of aluminum and biased by a compression spring.
  • the support of the compression spring is effected by a support member also in the form of a steel bushing, which - apart from a bottom-side opening - is identical to the piston.
  • This steel jack is held by means of a round wire ring, which is supported on the bore.
  • the design and length of the steel bushing as a support results in a high material and Umformaufwand. Since the steel bushing as a piston and the steel bushing as a support element differ only through the opening, it must be ensured with further effort that the two parts are not mounted confused, which would lead to a malfunction of the pressure accumulator.
  • the object of the invention is therefore to provide a hydraulic actuation system with an easily manufactured and unmistakably mountable pressure accumulator.
  • the object of the invention is achieved in that the support element is designed as Federabstützblech whose axial extent is significantly shorter than the axial extent of the piston.
  • the Federab spalement can be easily and inexpensively executed as a deep-drawn part. This results in a cost-effective support element, which can not be confused with the designed as a steel sleeve piston due to its relatively short axial configuration.
  • the Federabstützblech has substantially a constant wall thickness, with a flat bottom, designed as a ball jacket transition region and a cylindrical ring, wherein the outer surface of the ring takes over the leadership in the bore. In this case, in addition to or simultaneously with the deep drawing, the opening in the bottom of Federabstützbleches be punched out.
  • Figure 1 is a perspective view of a Federabst Reifenbleches and Figure 2 is a section through the Federabstweilblech.
  • 1 generally designates a Federabstützblech.
  • the spring support plate 1 which has a constant wall thickness, see in particular Figure 2, has a flat bottom 2 with a central opening 3.
  • the flat bottom 2 is adjoined to the outside a transition region 4, which is formed as a ball jacket.
  • the transition region 4 further includes a cylindrical ring 5, the outer jacket takes over the guide in the hole, not shown, and is fitted there.
  • the spring support plate 1 is integrally formed.
  • Held is the Federabstützblech 1 in the bore, not shown, by means of a spring ring, also not shown, or by means of a non-positive or positive connection. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Springs (AREA)

Abstract

A hydraulic actuating system is proposed, in particular for gas exchange valves of reciprocating-piston internal combustion engines, having a pressure source for the hydraulic medium and having at least one pressure accumulator which can be connected to the pressure source and has a piston which can be displaced in a bore, a compression spring and a supporting element for the compression spring with a central opening (3), which supporting element is fixed by means of a spring ring, wherein the supporting element is configured as a spring supporting plate (1), the axial extent of which is considerably shorter than that of the piston.

Description

Bezeichnung der Erfindung  Name of the invention
Druckspeicher eines hydraulischen Betätigungssystems Beschreibung Accumulator of a hydraulic actuation system Description
Gebiet der Erfindung Field of the invention
Die Erfindung betrifft ein hydraulisches Betätigungssystem, insbesondere für Gaswechselventile von Hubkolbenbrennkraftmaschinen, mit einer Druckquelle für das hydraulische Medium und mit zumindest einem mit der Druckquelle verbindbaren Druckspeicher, der einen in einer Bohrung verschiebbaren Kolben, eine Druckfeder und ein mittels eines Federrings festgelegtes Stützelement für die Druckfeder mit einer zentralen Öffnung aufweist. The invention relates to a hydraulic actuation system, in particular for gas exchange valves of reciprocating internal combustion engines, with a pressure source for the hydraulic medium and at least one connectable to the pressure source pressure accumulator, a displaceable in a bore piston, a compression spring and a means of a spring ring fixed support member for the compression spring having a central opening.
Hintergrund der Erfindung Background of the invention
Ein derartiges hydraulisches Betätigungssystem ist durch das„MultiAir-System" des FIAT-Konzems bekannt, veröffentlicht unter www.fiat.de/cgi- bin/pbrand.dll/fiat Germany/news „Presse und Öffentlichkeitsarbeit Januar 2010". Such a hydraulic actuation system is known through the "MultiAir system" of the FIAT-Konzem, published under www.fiat.de/cgi- bin / pbrand.dll / fiat Germany / news "Press and Public Relations January 2010".
Bei diesem System ist ein Steuerblock vorgesehen, der an einem Zylinderkopf der Hubkolbenbrennkraftmaschine befestigt ist, eine Druckquelle für das hyd- raulische Medium aufweist, einen Druckspeicher beinhaltet und eine Betätigungseinrichtung aufweist. Der Druckspeicher weist einen als Stahlbuchse ausgebildeten Kolben auf, der in einer Bohrung im aus Aluminium hergestellten Steuerblock beweglich geführt und von einer Druckfeder vorgespannt ist. Die AbStützung der Druckfeder erfolgt durch ein Stützelement ebenfalls in Form einer Stahlbuchse, die - abgesehen von einer bodenseitigen Öffnung - mit dem Kolben identisch ist. Diese Abstütz-Stahlbuchse wird mittels eines Runddrahtringes, der sich an der Bohrung abstützt, gehalten. Durch die Ausgestaltung und Länge der Stahlbuchse als Abstützung ergibt sich ein hoher Material- und Umformaufwand. Da die Stahlbuchse als Kolben und die Stahlbuchse als Stützelement sich nur durch die Öffnung unterscheiden, muss mit weiterem Aufwand sichergestellt werden, dass die beiden Teile nicht verwechselt montiert werden, was zu einer Fehlfunktion des Druckspeichers führen würde. In this system, a control block is provided, which is attached to a cylinder head of the reciprocating internal combustion engine, having a pressure source for the hydraulic medium, includes a pressure accumulator and having an actuating device. The pressure accumulator has a designed as a steel bushing piston, which is movably guided in a bore in the control block made of aluminum and biased by a compression spring. The support of the compression spring is effected by a support member also in the form of a steel bushing, which - apart from a bottom-side opening - is identical to the piston. This steel jack is held by means of a round wire ring, which is supported on the bore. The design and length of the steel bushing as a support results in a high material and Umformaufwand. Since the steel bushing as a piston and the steel bushing as a support element differ only through the opening, it must be ensured with further effort that the two parts are not mounted confused, which would lead to a malfunction of the pressure accumulator.
Aufgabe der Erfindung Aufgabe der Erfindung ist es daher, ein hydraulisches Betätigungssystem mit einem einfach herstellbaren und verwechslungssicher montierbaren Druckspeicher anzugeben. Object of the invention The object of the invention is therefore to provide a hydraulic actuation system with an easily manufactured and unmistakably mountable pressure accumulator.
Zusammenfassung der Erfindung Summary of the invention
Die Aufgabe der Erfindung wird dadurch gelöst, dass das Stützelement als Federabstützblech ausgeführt ist, dessen Axialerstreckung deutlich kürzer als die Axialerstreckung des Kolbens ist. Das Federabstützelement kann einfach und kostengünstig als Tiefziehteil ausgeführt werden. Dadurch ergibt sich ein kostengünstiges Stützelement, das aufgrund seiner axial relativ kurzen Ausgestaltung auch nicht mit dem als Stahlbuchse ausgebildeten Kolben verwechselt werden kann. Das Federabstützblech weist im Wesentlichen eine konstante Wandstärke auf, mit einem ebenen Boden, einem als Kugelmantel ausgebildeten Übergangsbereich und einem zylindrischen Ring, wobei der Außenmantel des Rings die Führung in der Bohrung übernimmt. Dabei kann zusätzlich oder gleichzeitig mit dem Tiefziehen die Öffnung im Boden des Federabstützbleches mit ausgestanzt werden. Kurze Beschreibung der Zeichnungen The object of the invention is achieved in that the support element is designed as Federabstützblech whose axial extent is significantly shorter than the axial extent of the piston. The Federabstützelement can be easily and inexpensively executed as a deep-drawn part. This results in a cost-effective support element, which can not be confused with the designed as a steel sleeve piston due to its relatively short axial configuration. The Federabstützblech has substantially a constant wall thickness, with a flat bottom, designed as a ball jacket transition region and a cylindrical ring, wherein the outer surface of the ring takes over the leadership in the bore. In this case, in addition to or simultaneously with the deep drawing, the opening in the bottom of Federabstützbleches be punched out. Brief description of the drawings
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnungen verwiesen, in denen ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist. Es zei- gen: For further explanation of the invention reference is made to the drawings, in which an embodiment of the invention is shown in simplified form. Show it:
Figur 1 eine perspektivische Ansicht eines Federabstützbleches und Figur 2 einen Schnitt durch das Federabstützblech. Figure 1 is a perspective view of a Federabstützbleches and Figure 2 is a section through the Federabstützblech.
Detaillierte Beschreibung der Zeichnung Detailed description of the drawing
In den Figuren 1 und 2 ist, soweit im Einzelnen dargestellt, mit 1 allgemein ein Federabstützblech bezeichnet. Das Federabstützblech 1 , das, siehe insbe- sondere Figur 2, eine konstante Wandstärke aufweist, hat einen ebenen Boden 2 mit einer zentralen Öffnung 3. An den ebenen Boden 2 schließt sich nach außen ein Übergangsbereich 4 an, der als Kugelmantel ausgebildet ist. An den Übergangsbereich 4 schließt sich weiterhin ein zylindrischer Ring 5 an, dessen Außenmantel die Führung in der nicht dargestellten Bohrung übernimmt und dort eingepasst ist. Das Federabstützblech 1 ist einstückig ausgebildet. Gehalten wird das Federabstützblech 1 in der nicht dargestellten Bohrung mittels eines ebenfalls nicht abgebildeten Federrings oder mittels einer kraft- oder formschlüssigen Verbindung. Bezugszeichenliste In Figures 1 and 2, as far as shown in detail, 1 generally designates a Federabstützblech. The spring support plate 1, which has a constant wall thickness, see in particular Figure 2, has a flat bottom 2 with a central opening 3. The flat bottom 2 is adjoined to the outside a transition region 4, which is formed as a ball jacket. At the transition region 4 further includes a cylindrical ring 5, the outer jacket takes over the guide in the hole, not shown, and is fitted there. The spring support plate 1 is integrally formed. Held is the Federabstützblech 1 in the bore, not shown, by means of a spring ring, also not shown, or by means of a non-positive or positive connection. LIST OF REFERENCE NUMBERS
1 Federabstützblech 1 spring support plate
2 Boden  2 floor
3 Öffnung  3 opening
4 Übergangsbereich  4 transition area

Claims

Patentansprüche  claims
Hydraulisches Betätigungssystem, insbesondere für Gaswechselventile von Hubkolbenbrennkraftmaschinen, mit einer Druckquelle für das hydraulische Medium und mit zumindest einem mit der Druckquelle verbindbaren Druckspeicher, der einen in einer Bohrung axial verschiebbaren Kolben, eine Druckfeder und ein mittels eines Federrings festgelegtes Stützelement für die Druckfeder mit einer zentralen Öffnung (3) aufweist, dadurch gekennzeichnet, dass das Stützelement als Federabstützblech (1) ausgeführt ist, dessen Axialerstreckung deutlich kürzer als die Axialerstreckung des Kolbens ist. Hydraulic actuating system, in particular for gas exchange valves of reciprocating internal combustion engines, with a pressure source for the hydraulic medium and at least one connectable to the pressure source pressure accumulator, a piston axially displaceable in a bore, a compression spring and a spring ring fixed by a support element for the compression spring with a central Opening (3), characterized in that the support element is designed as Federabstützblech (1) whose axial extension is significantly shorter than the axial extension of the piston.
Hydraulisches Betätigungssystem nach Anspruch 1 , dadurch gekennzeichnet, dass das Federabstützblech (1 ) als Tiefziehteil ausgebildet ist. Hydraulic actuating system according to claim 1, characterized in that the Federabstützblech (1) is designed as a deep-drawn part.
Hydraulisches Betätigungssystem nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Federabstützblech (1 ) eine im Wesentlichen konstante Wandstärke mit einem ebenen Boden (2), einem als Kugelmantel ausgebildeten Übergangsbereich (4) und einen zylindrischen Ring (5) aufweist, wobei der Außenmantel des Rings (5) die Führung in der Bohrung übernimmt. Hydraulic actuating system according to one of claims 1 or 2, characterized in that the Federabstützblech (1) has a substantially constant wall thickness with a flat bottom (2), designed as a ball jacket transition region (4) and a cylindrical ring (5), wherein the outer casing of the ring (5) takes over the guidance in the bore.
Hydraulisches Betätigungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Öffnung (3) durch Stanzen hergestellt ist. Hydraulic actuating system according to one of the preceding claims, characterized in that the opening (3) is produced by stamping.
EP11732415.2A 2010-11-25 2011-07-07 Pressure accumulator of a hydraulic actuating system Withdrawn EP2643564A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010052550A DE102010052550A1 (en) 2010-11-25 2010-11-25 Accumulator of a hydraulic actuation system
PCT/EP2011/061470 WO2012069211A1 (en) 2010-11-25 2011-07-07 Pressure accumulator of a hydraulic actuating system

Publications (1)

Publication Number Publication Date
EP2643564A1 true EP2643564A1 (en) 2013-10-02

Family

ID=44367011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11732415.2A Withdrawn EP2643564A1 (en) 2010-11-25 2011-07-07 Pressure accumulator of a hydraulic actuating system

Country Status (4)

Country Link
US (1) US20130255608A1 (en)
EP (1) EP2643564A1 (en)
DE (1) DE102010052550A1 (en)
WO (1) WO2012069211A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108361A1 (en) 2021-04-01 2022-10-06 Schaeffler Technologies AG & Co. KG Hydraulic unit for an electrohydraulic gas exchange valve control

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962013A (en) * 1957-12-13 1960-11-29 Ferdinando C Reggio Engine valve mechanism
DE3941241C2 (en) * 1989-12-14 2002-03-21 Continental Teves Ag & Co Ohg Piston pressure accumulator, in particular for brake systems controlled by drive slip, and a switching arrangement therefor
JPH03260344A (en) * 1990-03-08 1991-11-20 Honda Motor Co Ltd Method for controlling internal combustion engine
DE19519832B4 (en) * 1995-05-31 2004-04-22 Robert Bosch Gmbh hydraulic accumulator
US6390133B1 (en) * 2000-05-17 2002-05-21 Robert Bosch Corporation Hydraulic accumulator vent and method for making the same
FI119523B (en) * 2007-03-09 2008-12-15 Waertsilae Finland Oy Shock absorber for damping pressure variations in the hydraulic system and hydraulic system
DE102007054376A1 (en) * 2007-11-14 2009-05-20 Schaeffler Kg Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable valve train

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012069211A1 *

Also Published As

Publication number Publication date
DE102010052550A1 (en) 2012-05-31
US20130255608A1 (en) 2013-10-03
WO2012069211A1 (en) 2012-05-31

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