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WO2019214774A1 - Unité hydraulique d'une commande de soupape d'échange de gaz électrohydraulique - Google Patents

Unité hydraulique d'une commande de soupape d'échange de gaz électrohydraulique Download PDF

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Publication number
WO2019214774A1
WO2019214774A1 PCT/DE2019/100404 DE2019100404W WO2019214774A1 WO 2019214774 A1 WO2019214774 A1 WO 2019214774A1 DE 2019100404 W DE2019100404 W DE 2019100404W WO 2019214774 A1 WO2019214774 A1 WO 2019214774A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
valve
housing
piston guide
hydraulic unit
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
PCT/DE2019/100404
Other languages
German (de)
English (en)
Inventor
Murat YAKAN
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 WO2019214774A1 publication Critical patent/WO2019214774A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0708—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides comprising means to avoid jamming of the slide or means to modify the flow
    • 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
    • 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
    • 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 hydraulic unit of an electro-hydraulic gas exchange valve control of an internal combustion engine, comprising:
  • the inside of the housing limits a running in the piston guide pressure chamber and the outside of the housing actuates the gas exchange valve.
  • the object of the invention is to constructively improve a hydraulic unit of the aforementioned type with respect to the self-stemming of the piston guide for the slave piston in the hydraulic housing.
  • the caulked deformation is accommodated in the radial gap between the inner part and the outer part and therefore remains largely or completely confined to the outer part.
  • the bearing the slave piston Füh approximately bore of the decoupled from the caulking inner part is therefore not or at least not unduly strongly deformed.
  • the radial distance between the surfaces Mantelflä may be formed by one or more annular grooves extending in the axial region of the self-restraint on the outer circumferential surface of the inner part and / or on the réelleman tel
  • the radial distance may optionally or alternatively be formed by the fact that the inner part in the axial region of the self-restraint has a chamfer or a radius as a transition between its outer circumferential surface and the housing-side axial end side.
  • FIG. 1 shows a known hydraulic unit of an electro-hydraulic gas exchange valve control in perspective view
  • FIG. 2 shows a cross section through the hydraulic unit along a transmitter unit mounted therein;
  • Figure 4 shows a cross section through the hydraulic unit along a mounted therein
  • Figure 5 shows the first embodiment of a piston guide according to the invention in a perspective view
  • FIG. 6 shows the piston guide according to FIG. 5 in longitudinal section
  • Figure 7 shows the second embodiment of a piston guide according to the invention in
  • Figure 8 shows the third embodiment of a piston guide according to the invention in
  • Figure 1 shows the overall view of a known hydraulic unit 1, which is ready pre-assembled for installation in a cylinder head of a four-cylinder in-cylinder engine with electro-hydraulic control of the gas exchange valves.
  • gear units 3 are added in a connected to the oil circuit of the engine hydraulic housing 2 driven by the cams of a camshaft, not shown.
  • Electromagnetic hydraulic valves 4 are located on the longitudinal side of the hydraulic housing 2 opposite the transmitter units 3.
  • the encoder unit 3 comprises a cam follower as a ge on a rigid support member 5 pivotally mounted drag lever 6 with a needle bearing roller 7 as Nockenabgriff, a spring-loaded master piston 8 and a screwed in the hydraulic housing 2 piston guide 32 in which the master piston 8 is guided axially movable.
  • the cam elevation is transmitted outside the housing to the master piston 8, which delimits on the housing side a volume-variable pressure chamber 9.
  • To the auftre in the pressure chamber 9 border hydraulic fluid pressures in the range of 200 bar plus pressure peaks due to To control pressure pulsations material technology, which is closed by a screwed housing cover 10 ver closed hydraulic housing 2 as a pressure-tight aluminum miniumschmiedeteil.
  • the pressure chamber 9 is connected to a pressure relief chamber 11, which in turn is bounded by a spring-loaded piston 12 of a pressure accumulator.
  • a screwed into the hydraulic housing 2 sensor 13 is used to detect the hydraulic fluid temperature.
  • FIG. 3 shows a receiving unit 14 for actuating one of the gas exchange valves 23 (indicated here by a dashed line).
  • the slave unit 14 communicates with the master piston 8 of the transmitter unit 3 via channels 15 according to Figures 2 and 16 in hydraulic operative connection and comprises a cylindrical piston guide 17 which is screwed into a receiving opening 35 of the hydraulic housing 2, one in a guide bore 24 of the piston guide 17 axially movably guided slave piston 18, the inside of the housing limits the pressure chamber 9 and outside the housing the gas exchange valve 23 actuated, a hydraulic valve clearance compensation element 19, which is clamped between the slave piston 18 and the gas exchange valve 23 operatively, and a hydraulic valve brake 20.
  • the separation of the pressure chamber 9 from the pressure relief chamber 11 through the hydraulic valve 4 is apparent from the cross section shown in Figure 4 along the hydraulic valve 4.
  • the channels 15 and 16 are hydraulically connected to each other via an hydraulic valve 4 extending annular groove 21, so that the annular groove 21 as well as the channels 15 and 16 are part of the pressure chamber 9.
  • the hydraulic valve 4 allows an overflow of hydraulic fluid from the pressure chamber 9 in the pressure relief chamber 11 and back via a pressure relief chamber 11 with the annular groove 21 connecting drilling tion 22 to.
  • the hydraulic valve 4 and the hydraulic housing 2 are non-releasably joined by means of a self-per se known per se.
  • Reason for this is only a few microns large Füh approximately clearance between the slave piston 18 and the guide bore 24, the radial inward deformation due to the self-restraint would be much larger than the Füh approximately game and therefore tion for clamping the slave piston 18 in the ceremoniessboh 24 would result.
  • the piston guide 17 is designed with an outer part 25 and an inner part 26 fixed therein in several parts.
  • the attachment is made in the present case by an interference fit between the outer circumferential surface of the inner part 26 and the inner circumferential surface of the outer part 25.
  • the housing-inside, i. the gas exchange valve 23 remote end portion of the outer part 25 has a bottom 27 which axially supports the frontally abutting inner part 26.
  • the piston guide 17 has a return check valve 28 to the - indicated by dashed lines - slave piston 18 opens to a hydraulic fluid flow in the pressure chamber 9 via openings 29 in the bottom 27 zuzulas sen.
  • the check valve 28 includes a valve ball 30, a pressed in the bottom 27 first valve seat 31 and a bottom 27 formed by the second valve seat 32.
  • the valve ball 30 is closed check valve 28 sealingly against the first valve seat 31 and with open check valve 28 on the second valve seat 32nd at.
  • Both the outer part 25 and the inner part 26 are made of steel material. Only the inner part 26 has the required surface wear resistance of the guide bore 24 with respect to the axial guidance of the slave piston 18 and is hardened for this purpose. In contrast, the outer part 25 is manufactured in favor of low Herstellard heat treatment free.
  • the outer circumferential surface of the thus consisting of "soft" steel material outer part 25 is for the purpose of self-restraint with the even "softer" wall of the receiving opening 35 of the best (aluminum best existing) hydraulic housing 2 with two annular grooves 33 and these limiting diameter steps 34 provided in undeformed State so strongly overlap with the diameter of the receiving opening 35 that the pressing of the piston guide 17 in the hydraulic housing 2 a local material flow of the wall into the annular grooves 33 acts be, whereby the piston guide 17 inextricably form-locking manner in the receiving opening 35th is attached.
  • the multi-part of the piston guide 17 makes it possible in the axial region of the self-stemmung, i. locally in the axial region of the annular grooves 33, the outer circumferential surface of the inner part 26 to be radially spaced from the inner circumferential surface of the outer part 25.
  • the radial distance of the two lateral surfaces is at least before the Dstemmung and is such that the inevitable with the caulking of the receiving opening 35 radial deformation of the outer part 25 is not or not substantially transferred to the inner part 26 and consequently its guide bore 24 for the exact guidance of the slave piston 18 retains required cylindrical shape with a small and closely tolerated leadership game.
  • the radial distance is formed in the axial region of the housing-side annular groove 33 by an annular groove 36 on the outer circumferential surface of the inner part 26 and in the axial region of the housewear-side annular groove 33 by a reduced diameter shoulder 37 on ven til rocken end portion of the inner part 26.
  • FIG. 7 shows the outer part 25, likewise not heat-treated, of a piston guide 17 modified with respect to FIG. 6.
  • a hardened stop disc 38 which is fastened to the "soft" base 27, protects the outer part 25 against seat wear due to the slave piston 18 operating against it at high frequency.
  • the piston guide 17 shown in Figure 8 differs from the two embodiments explained above by the following details:
  • the inner part 26 is fixed in the outer part 25 by means of a compressed with the outer part 25 clamping ring 39 which holds the inner part 26 in abutment with the bottom 27.
  • the clamping ring 39 is presently pressed in the valve-side end portion of the outer part 25 and is located on the front side of the step of the paragraph 37 of the inner part 26 at;
  • One of the lateral surfaces and in this case the outer circumferential surface of the clamping ring 39 be found in clamping contact with one of the lateral surfaces and in this case the inner shell surface of a sleeve 40. This is against the clamping contact force axially displaceable on (alternatively: in) the clamping ring 39 is supported and holds the slave piston 18 and the hyd raulische valve clearance compensation element 19 against axial extension and against loss secured in the piston guide 17, as long as the hydraulic unit 1 is not mounted in the internal combustion engine;
  • the extending in the axial region of the self-locking annular groove 36 is optional for receiving a sealing ring 41 which seals a leakage gap between the outer circumferential surface of the inner part 26 and the inner circumferential surface of the outer part 25 in the direction of Ver supply bore 42 for the lash adjuster 19.
  • valve-side end portion of the outer part 25 is provided with a further annular groove 43 and a sealing ring 44 inserted therein, which seals the supply bore 42 against the mouth of the receiving opening 35.

Landscapes

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

Abstract

L'invention concerne une unité hydraulique (1) d'une commande de soupape d'échange de gaz électrohydraulique d'un moteur à combustion interne, comprenant : - un boîtier hydraulique (2) comprenant une ouverture de réception (35), - un guidage de piston (17) qui est fixé par auto-sertissage à la paroi de l'ouverture de réception dans le boîtier hydraulique, - et un piston récepteur (18) guidé mobile axialement dans le guidage de piston, lequel délimite du côté intérieur du boîtier une chambre de pression (9) s'étendant dans le guidage de piston et actionnant la soupape d'échange de gaz (23) du côté extérieur du boîtier. Le guidage de piston doit être constitué de plusieurs parties, avec une partie extérieure (25) et une partie intérieure (26) fixée à celle-ci, la surface de l'enveloppe extérieure de la partie intérieure étant espacée radialement de la surface de l'enveloppe intérieure de la partie extérieure dans la zone axiale de l'auto-sertissage.
PCT/DE2019/100404 2018-05-08 2019-05-06 Unité hydraulique d'une commande de soupape d'échange de gaz électrohydraulique Ceased WO2019214774A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102018110976 2018-05-08
DE102018110976.8 2018-05-08
DE102018129278.3 2018-11-21
DE102018129278 2018-11-21
DE102019109865.3A DE102019109865A1 (de) 2018-05-08 2019-04-15 Hydraulikeinheit einer elektrohydraulischen Gaswechselventilsteuerung
DE102019109865.3 2019-04-15

Publications (1)

Publication Number Publication Date
WO2019214774A1 true WO2019214774A1 (fr) 2019-11-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2019/100404 Ceased WO2019214774A1 (fr) 2018-05-08 2019-05-06 Unité hydraulique d'une commande de soupape d'échange de gaz électrohydraulique

Country Status (2)

Country Link
DE (1) DE102019109865A1 (fr)
WO (1) WO2019214774A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019128826B4 (de) 2019-10-25 2022-09-29 Schaeffler Technologies AG & Co. KG Hydraulikeinheit einer elektrohydraulischen Gaswechselventilsteuerung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796573A (en) * 1987-10-02 1989-01-10 Allied-Signal Inc. Hydraulic engine valve lifter assembly
DE3876762T2 (de) * 1987-11-19 1993-04-22 Honda Motor Co Ltd Vorrichtung zur ventilsteuerung in einer brennkraftmaschine.
WO1996028661A1 (fr) * 1995-03-11 1996-09-19 Itt Automotive Europe Gmbh Pompe a piston
WO2003038246A2 (fr) * 2001-10-19 2003-05-08 Robert Bosch Gmbh Actionneur hydraulique pour soupape a deux voies a gaz
DE102006008676A1 (de) 2006-02-24 2007-08-30 Schaeffler Kg Zylinderkopf einer Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung
DE102010021394A1 (de) 2010-05-25 2011-12-01 Schaeffler Technologies Gmbh & Co. Kg Befestigung einer Kolbenführungseinheit in einem Gehäuse
DE102011002680A1 (de) * 2011-01-14 2012-07-19 Schaeffler Technologies Gmbh & Co. Kg Hydraulikeinheit für eine Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung
DE102011075894A1 (de) 2011-05-16 2012-11-22 Schaeffler Technologies AG & Co. KG Hydraulikgehäuse einer elektrohydraulischen Ventilsteuerung
DE102013214651A1 (de) 2012-11-12 2014-05-15 Schaeffler Technologies Gmbh & Co. Kg Hydraulikgehäuse einer elektrohydraulischen Ventilsteuerung
DE102014201911A1 (de) 2014-02-04 2015-08-20 Schaeffler Technologies AG & Co. KG Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796573A (en) * 1987-10-02 1989-01-10 Allied-Signal Inc. Hydraulic engine valve lifter assembly
DE3876762T2 (de) * 1987-11-19 1993-04-22 Honda Motor Co Ltd Vorrichtung zur ventilsteuerung in einer brennkraftmaschine.
WO1996028661A1 (fr) * 1995-03-11 1996-09-19 Itt Automotive Europe Gmbh Pompe a piston
WO2003038246A2 (fr) * 2001-10-19 2003-05-08 Robert Bosch Gmbh Actionneur hydraulique pour soupape a deux voies a gaz
DE102006008676A1 (de) 2006-02-24 2007-08-30 Schaeffler Kg Zylinderkopf einer Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung
DE102010021394A1 (de) 2010-05-25 2011-12-01 Schaeffler Technologies Gmbh & Co. Kg Befestigung einer Kolbenführungseinheit in einem Gehäuse
DE102011002680A1 (de) * 2011-01-14 2012-07-19 Schaeffler Technologies Gmbh & Co. Kg Hydraulikeinheit für eine Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung
DE102011075894A1 (de) 2011-05-16 2012-11-22 Schaeffler Technologies AG & Co. KG Hydraulikgehäuse einer elektrohydraulischen Ventilsteuerung
DE102013214651A1 (de) 2012-11-12 2014-05-15 Schaeffler Technologies Gmbh & Co. Kg Hydraulikgehäuse einer elektrohydraulischen Ventilsteuerung
DE102014201911A1 (de) 2014-02-04 2015-08-20 Schaeffler Technologies AG & Co. KG Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE102019109865A1 (de) 2019-11-14

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