EP2550437B1 - Soupape de commande d'un système permettant l'ajustement du déphasage d'un arbre a cames par rapport au vilebrequin d'un moteur a combustion interne - Google Patents

Soupape de commande d'un système permettant l'ajustement du déphasage d'un arbre a cames par rapport au vilebrequin d'un moteur a combustion interne Download PDF

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Publication number
EP2550437B1
EP2550437B1 EP11704574.0A EP11704574A EP2550437B1 EP 2550437 B1 EP2550437 B1 EP 2550437B1 EP 11704574 A EP11704574 A EP 11704574A EP 2550437 B1 EP2550437 B1 EP 2550437B1
Authority
EP
European Patent Office
Prior art keywords
control valve
camshaft
fluid
fluid line
actuator
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.)
Not-in-force
Application number
EP11704574.0A
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German (de)
English (en)
Other versions
EP2550437A1 (fr
Inventor
Alexander Draheim
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 EP2550437A1 publication Critical patent/EP2550437A1/fr
Application granted granted Critical
Publication of EP2550437B1 publication Critical patent/EP2550437B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/34433—Location oil control valves
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve

Definitions

  • the invention relates to a control valve of a device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine, wherein the control valve in a region facing the camshaft having a fluid conduit for supplying pressurized fluid, wherein the control valve in an axial center region two fluid conduits to Supply and discharge of pressurized fluid to at least two hydraulic chambers, wherein the hydraulic chambers between a drive element and the camshaft are operatively arranged to set a defined relative rotational position between the drive element and the camshaft, and wherein the control valve in one of the camshaft remote area has a fluid line for the removal of fluid to a tank.
  • the fluid line for the removal of fluid in a preferably hollow cylindrical portion of the control valve is formed as at least one extending through the preferably hollow cylindrical portion to the outside of the portion recess, wherein in the preferably hollow cylindrical portion of the control valve, a control piston is arranged, which at its from the camshaft end facing away from an armature tappet of an actuator is contacted.
  • Camshaft adjusters particularly those that operate hydraulically, are well known in the art.
  • an impeller is present in which wings are molded or arranged.
  • the wings are located in hydraulic chambers, which are incorporated in an outer rotor (usually referred to as a stator).
  • an adjustment of the inner rotor can take place relative to the stator between an "early stop” and a "late stop”.
  • a generic control valve which is designed as an electrically controlled directional control valve.
  • a control valve is in the DE 10 2008 004 591 A1 disclosed. Shown is a control valve consisting of a housing cavity opening with a slightly conical edge on the axially facing an actuator end. The discharged fluid exits the control valve in an axial, slightly oblique direction. The slightly conical edge encloses an angle of approximately 20 ° (GRAD) relative to the axial direction.
  • the DE 196 11 365 A1 also shows a control valve.
  • the control valve has a fluid line in a region facing away from the camshaft.
  • the fluid line serves to remove fluid to a tank.
  • the fluid conduit is formed as a recess extending through the hollow cylindrical portion to the outside of the portion.
  • the EP 2 365 193 A1 discloses another control valve. Shown is a control valve with a fluid line for supplying pressurized fluid, wherein the fluid line is arranged in a camshaft facing region of the control valve. In a central area, two supply connections are arranged. In a region facing away from the camshaft region, a further fluid conduit is arranged, wherein the Fluid line of the discharge of pressurized fluid is used to a tank.
  • the fluid line in a preferably hollow-cylindrical section of the control valve is designed as at least one recess extending through a hollow-cylindrical section to the outside of the section.
  • a control piston is arranged, which is contacted at its end facing away from the camshaft end of an armature tappet of an actuator.
  • Another control valve shows the DE 10 2008 004 591 A1 ,
  • a control valve that from a high pressure area pressure oil is passed through a fluid line, which is formed by at least one bore in the control valve, in a camshaft facing portion of the valve into the interior of the valve.
  • the valve has controls that allow the pressure oil to be fed into two fluid lines in the axial center area of the valve, which are in fluid communication with the hydraulic chambers of the camshaft phaser.
  • the relative rotation of the stator of the camshaft adjuster can be made to the camshaft, which is well known.
  • the oil is then fed back into a tank in a region of the valve facing away from the camshaft.
  • DE 10 2008 004 591 A1 provides for this that the oil inside the control valve and in particular by the interior of a control piston (valve piston) out and is derived in the axial end of the control piston by piston cavity openings concentrically from the valve. Ie. the oil drainage takes place axially through the control valve running as the central valve to the tank.
  • a disadvantage of this solution is that in the region of the outflow of the hydraulic oil of the armature plunger of an electromagnetic actuator (central magnet) is arranged, which contacts the control piston and axially displaces in the required manner to the flow of hydraulic oil in the To control camshaft adjuster.
  • an electromagnetic actuator central magnet
  • a further disadvantage is that during operation of the internal combustion engine partially higher temperatures occur in the camshaft adjuster in the region of the central magnet.
  • the present invention has the object, a control valve of the generic type in such a way that it is possible to protect the contact point between the armature plunger of the central magnet and the valve piston from the ingress of contaminants and thus to reduce wear in the camshaft adjuster. Furthermore, a possibility should be created to better cool the central magnet and possibly other attachments.
  • the solution of this object by the invention is characterized in that the at least one recess (11) is radially aligned and at an angle (alpha ⁇ ) between 30 ° and 60 ° to the axial direction (A) extends such that fluid thereby on the end face (18) of the actuator (16) is directed.
  • the at least one recess, in particular the bore is radially aligned according to an embodiment of the invention.
  • the at least one recess, in particular the bore extends at an angle to the axial direction; the angle is preferably between 30 ° and 60 °.
  • a control piston arranged, which is contacted at its side facing away from the camshaft axial end of an armature tappet of an actuator.
  • the fluid line for removing fluid is preferably formed as at least one bore. It can be formed by a plurality of recesses distributed around the circumference of the preferably hollow-cylindrical section, in particular bores.
  • the actuator is preferably designed as an electromagnet.
  • a longitudinal axis of the recess, in particular of the bore, can impinge on an end face of the actuator for cooling.
  • the control valve is preferably designed as a central screw and arranged with a threaded portion in a threaded bore in the camshaft.
  • oil that comes from the camshaft adjuster and is to be discharged into the tank is no longer discharged axially from the end face of the control valve as in the prior art, but by radial or oblique holes outside the contact area between the armature plunger of the central magnet and the valve piston.
  • contaminants present in the oil are conducted away from the contact point armature plunger - valve piston.
  • the invention proposal proposes to cool the central magnet with the oil which is passed to the tank.
  • the oil can be directed in particular through the oil drain holes on the surface of the central magnet, which ensures a corresponding cooling of the central magnet.
  • Fig. 1 is a part of an internal combustion engine sketched, wherein a cylinder head 21 is indicated, in which a camshaft 3 is mounted.
  • the drive of the camshaft 3 via a drive element 9 of a camshaft adjuster 2, wherein the drive element 9 is in (not shown) rotary connection with the (also not shown) crankshaft of the engine.
  • the camshaft adjuster 2 there is a hydraulic adjusting device which can accomplish an angular rotation between the drive element 9 and the camshaft 3 to influence the timing of the internal combustion engine in a known manner.
  • paired (not closer to be recognized) hydraulic chambers between the drive element 9 and the camshaft 3 are effectively arranged, which can be acted upon by pressurized fluid to adjust the said rotation can.
  • Several of these pairs of hydraulic chambers are present over the circumference.
  • the camshaft adjuster 2 thus serves to change the relative angular position of the camshaft 3 relative to the crankshaft of the internal combustion engine.
  • control valve 1 which - formed as a central valve - in an axial end portion has a threaded portion 19 which is screwed into a threaded bore 20 in the camshaft 3.
  • control valve 1 The actuation of the control valve 1 is effected by axial loading of a control piston 1 arranged in the control piston 14, which is acted upon by an electromagnet 16 and in particular of its armature plunger 15 in the axial direction A.
  • the control valve 1 has in a region 4 facing the camshaft 3 (see this Fig. 2 ) a fluid line 5 for supplying pressurized fluid from a high-pressure chamber 22 from.
  • the fluid line 5 comprises a plurality of bores extending in the radial direction r, which enable hydraulic oil to enter the interior of the control valve 1.
  • the control valve 1 has two fluid lines 7 and 8 for supply and discharge of pressurized hydraulic oil in the hydraulic chambers of the camshaft adjuster 2.
  • the control valve 1 In a side facing away from the camshaft 3 region 10 (s. Fig. 2 ), the control valve 1 on a fluid line 11 for the removal of fluid to a tank.
  • Fig. 2 is indicated by arrows as oil flows from the high-pressure chamber 22 ("closed") into the control valve 1. From this, the chambers ("K”) oil is supplied or derived from these. Then the oil flows into the tank (“down").
  • the fluid line 11 is provided for the removal of fluid to the tank in a preferably hollow cylindrical portion 12 of the control valve 1 is, wherein said fluid conduit is formed as at least one extending through the preferably hollow cylindrical portion 12 to the outer side 13 of the portion 12 recess 11.
  • the recess is a bore.
  • the hydraulic oil does not flow out of the control valve 1 in the axial direction and toward the contact of the armature plunger 15 with the control piston 14, but it is discharged radially outward from the control valve 1.
  • the portion 12 is not formed as an ideal hollow cylindrical portion, but that the hollow cylindrical portion has a hexagonal shape on the outside, wherein in each of the six outer sides 13 of the hexagon ever a bore 11 is incorporated, extending at an angle ⁇ to the outside extends.
  • Fig. 4 corresponds largely to that according to Fig. 2 , wherein only the oil drain holes, ie the recesses 11, here in the radial direction r, not at an angle ⁇ .
  • the oil drain holes are made so that the control valve housing is drilled from the outside.
  • the bores are preferably designed or aligned such that they strike the surface of the central magnet.
  • the bores can also be designed or aligned so that they strike the surface of a housing covering the camshaft adjusting system or another component.

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

Claims (6)

  1. Soupape de commande (1) d'un dispositif (2) permettant de modifier la position angulaire relative d'un arbre à cames (3) par rapport à un vilebrequin d'un moteur à combustion interne, la soupape de commande (1) présentant, dans une région (4) tournée vers l'arbre à cames (3), une conduite fluidique (5) pour l'alimentation en fluide sous pression, la soupape de commande (1) présentant, dans une région centrale axiale (6), deux conduites fluidiques (7, 8) pour l'alimentation et l'évacuation de fluide sous pression vers au moins deux chambres hydrauliques, les chambres hydrauliques étant disposées de manière à agir entre un élément d'entraînement (9) et l'arbre à cames (3), afin d'ajuster une position de rotation relative définie entre l'élément d'entraînement (9) et l'arbre à cames (3), et la soupape de commande (1) présentant, dans une région (10) opposée à l'arbre à cames (3), une conduite fluidique (11) pour l'évacuation de fluide vers un réservoir, la conduite fluidique (11), pour l'évacuation de fluide dans une portion (12) de préférence cylindrique creuse de la soupape de commande (1), étant réalisée sous forme d'au moins un évidement s'étendant à travers la portion (12) de préférence cylindrique creuse vers le côté extérieur (13) de la portion (12), et un piston de commande (14) étant disposé dans la portion (12) de préférence cylindrique creuse de la soupape de commande (1), lequel, au niveau de son extrémité opposée à l'arbre à cames (3), est amené en contact avec un poussoir d'induit (15) d'un actionneur (16), caractérisée en ce que l'au moins un évidement (11) est orienté radialement et s'étend suivant un angle (alpha α) compris entre 30° et 60° par rapport à la direction axiale (A) de telle sorte que du fluide soit guidé à travers lui sur la surface frontale (18) de l'actionneur (16).
  2. Soupape de commande selon la revendication 1, caractérisée en ce que la conduite fluidique (11) est réalisée par plusieurs évidements, notamment des alésages, répartis sur la périphérie de la portion (12) de préférence cylindrique creuse.
  3. Soupape de commande selon la revendication 1 ou 2, caractérisée en ce qu'un axe longitudinal (17) de l'évidement (11), en particulier de l'alésage, tombe sur une surface frontale (18) de l'actionneur (16).
  4. Soupape de commande selon l'une quelconque des revendications précédentes, caractérisée en ce que la conduite fluidique (11) pour l'évacuation de fluide est réalisée sous forme d'au moins un alésage.
  5. Soupape de commande selon l'une quelconque des revendications précédentes, caractérisée en ce que l'actionneur (16) est réalisé sous forme d'électroaimant.
  6. Soupape de commande selon la revendication 1, caractérisée en ce qu'elle est réalisée sous forme de vis centrale et est disposée avec une portion filetée (19) dans un alésage fileté (20) dans l'arbre à cames (2).
EP11704574.0A 2010-03-24 2011-02-08 Soupape de commande d'un système permettant l'ajustement du déphasage d'un arbre a cames par rapport au vilebrequin d'un moteur a combustion interne Not-in-force EP2550437B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010012479 DE102010012479A1 (de) 2010-03-24 2010-03-24 Steuerventil einer Vorrichtung zur Veränderung der relativen Winkellage einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine
PCT/EP2011/051806 WO2011117019A1 (fr) 2010-03-24 2011-02-08 Soupape de commande d'un dispositif servant à modifier la position angulaire relative d'un arbre à cames par rapport à un vilebrequin d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2550437A1 EP2550437A1 (fr) 2013-01-30
EP2550437B1 true EP2550437B1 (fr) 2016-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11704574.0A Not-in-force EP2550437B1 (fr) 2010-03-24 2011-02-08 Soupape de commande d'un système permettant l'ajustement du déphasage d'un arbre a cames par rapport au vilebrequin d'un moteur a combustion interne

Country Status (5)

Country Link
US (1) US8733306B2 (fr)
EP (1) EP2550437B1 (fr)
CN (1) CN102822456A (fr)
DE (1) DE102010012479A1 (fr)
WO (1) WO2011117019A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8662039B2 (en) 2011-03-16 2014-03-04 Delphi Technologies, Inc. Camshaft phaser with coaxial control valves
DE102012200365A1 (de) 2012-01-12 2013-07-18 Schaeffler Technologies AG & Co. KG Versorgung eines Druckspeichers eines Nockenwellenverstellsystems
DE102012201567B4 (de) 2012-02-02 2013-12-05 Schaeffler Technologies AG & Co. KG Gestaltung eines Hydraulikölkanals zwischen einem Zentralventil und einem Volumenspeicher eines Nockenwellenverstellers
CN104350241B (zh) * 2012-05-25 2016-12-14 舍弗勒技术股份两合公司 凸轮轴调节器的控制阀
DE102012208809B4 (de) * 2012-05-25 2020-11-26 Schaeffler Technologies AG & Co. KG Steuerventil eines Nockenwellenverstellers
DE102012218802B4 (de) * 2012-10-16 2018-05-17 Schaeffler Technologies AG & Co. KG Steuerventil für ein Nockenwellenverstellersystem
DE102015206354B4 (de) 2015-04-09 2024-05-16 Schaeffler Technologies AG & Co. KG Steuerventil für einen Nockenwellenversteller mit innerem Tankanschluss
US20180266286A1 (en) * 2015-09-21 2018-09-20 Schaeffler Technologies AG & Co. KG Control valve for a camshaft adjuster
WO2018019633A1 (fr) * 2016-07-27 2018-02-01 ECO Holding 1 GmbH Piston pour unité hydraulique d'un dispositif de réglage à pivotement et dispositif de réglage à pivotement pour un arbre à cames
JP6769253B2 (ja) * 2016-11-14 2020-10-14 アイシン精機株式会社 弁開閉時期制御装置
US10760454B2 (en) * 2017-09-19 2020-09-01 ECO Holding 1 GmbH Oil control valve to control a cam phaser with a spool positioned by an external actuator and having a groove
JP7308642B2 (ja) * 2019-03-29 2023-07-14 日立Astemo株式会社 流路切替弁

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US6336433B1 (en) 1999-04-14 2002-01-08 Daimlerchrysler Ag Apparatus for adjusting the relative angle of a cam shaft
DE10346443A1 (de) 2003-10-07 2005-05-04 Daimler Chrysler Ag Hydraulischer Nockenwellenversteller für eine Brennkraftmaschine
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Also Published As

Publication number Publication date
EP2550437A1 (fr) 2013-01-30
WO2011117019A1 (fr) 2011-09-29
CN102822456A (zh) 2012-12-12
US8733306B2 (en) 2014-05-27
DE102010012479A1 (de) 2011-09-29
US20120325169A1 (en) 2012-12-27

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