EP2550437A1 - 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 - Google Patents

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

Info

Publication number
EP2550437A1
EP2550437A1 EP11704574A EP11704574A EP2550437A1 EP 2550437 A1 EP2550437 A1 EP 2550437A1 EP 11704574 A EP11704574 A EP 11704574A EP 11704574 A EP11704574 A EP 11704574A EP 2550437 A1 EP2550437 A1 EP 2550437A1
Authority
EP
European Patent Office
Prior art keywords
control valve
camshaft
fluid
valve according
fluid line
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
EP11704574A
Other languages
German (de)
English (en)
Other versions
EP2550437B1 (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

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
    • F01L1/34—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 with respect to a crankshaft of an internal combustion engine, wherein the control valve in a region facing the camshaft has a fluid line for supplying pressurized fluid, wherein the control valve in a central axial region two flow. idleitept for supplying and discharging fluid under pressure to at least two Hydraulikkammem, wherein the hydraulic chambers between a drive element and the camshaft are arranged effectively to set a defined relative rotational position between the drive element and the camshaft, and wherein the control valve in one of the camshaft facing away from a fluid conduit for the removal of fluid to a tank.
  • Camshaft phasing devices particularly those that operate hydraulically, are well known in the art.
  • the hydraulic camshaft adjuster has an impeller in which vanes are formed or arranged.
  • the wings are located in hydraulic chambers, which are incorporated in an outer rotor (usually referred to as a stator).
  • an outer rotor usually referred to as a stator.
  • control valve which is designed as an electrically controlled directional control valve.
  • Such a control valve is disclosed in 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.
  • Said DE 10 2008 004 591 A1 provides for this purpose that the oil in the interior of 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 hydraulic oil, the armature plunger of an electromagnetic actuator (central magnet) is arranged, which contacts the control piston and axially displaces in the required manner to control the flow of hydraulic oil in the camshaft adjuster. This will allow contamination in the oil (particles) to get to the contact point between the armature plunger and valve piston and deposited here and so act on this strigi adoptedele body with abrasive particles. The result is a corresponding disadvantageous wear at the contact point.
  • 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 is based on the invention to develop a control valve of the generic type so 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 object of this invention is characterized in that the fluid line for removing fluid in a preferably hollow-cylindrical section of the control valve is designed as at least one recess extending through the preferably hollow-cylindrical section to the outside of the section.
  • 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 at least one recess, in particular the bore is radially aligned according to an embodiment of the invention.
  • An alternative embodiment provides that 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 is usually arranged, which is contacted at its side facing away from the camshaft axial end of an armature plunger of an actuator.
  • 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. According to the invention, therefore, 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. Thus, contaminants present in the oil are conducted away from the contact point of the tappet - 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 by the Olabhnebohronne on the surface of the central magnet, which provides for a corresponding cooling of the central magnet.
  • FIG. 1 shows the radial section through a part of an internal combustion engine with a device for changing the relative angular position of a
  • Camshaft relative to a crankshaft of the internal combustion engine ie a camshaft adjuster
  • FIG. 3 the control valve of FIG. 2 in perspective view
  • Fig. 4 shows the radial section of the control valve of the camshaft adjuster according to a second embodiment of the invention.
  • a part of an internal combustion engine is 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 takes place 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 by its armature plunger 15 in the axial direction A.
  • the control valve 1 has a fluid line 5 for supplying pressurized fluid from a high-pressure chamber 22 in a region 4 facing the camshaft 3 (see FIG.
  • 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 supplying and discharging pressurized hydraulic oil into the hydraulic chambers of the camshaft adjuster 2.
  • an area 10 facing away from the camshaft 3 (FIG. see Fig. 2), the control valve 1, a fluid line 1 1 for the removal of fluid to a tank.
  • arrows indicate how oil flows from the high-pressure chamber 22 ("closed") into the control valve 1. From this, oil is supplied to or discharged from the chambers ("K”). Then the oil flows into the tank (“down”).
  • the fluid line 1 1 is provided for the removal of fluid to the tank in a preferably hollow cylindrical portion 12 of the control valve 1, said fluid line than at least a recess 11 extending through the preferably hollow-cylindrical section 12 to the outer side 13 of the section 12 is formed.
  • the recess is a bore.
  • the hydraulic oil in the proposed control valve 1 does not flow in the axial direction from the control valve 1 and in the direction of the contact of the Ankerst Prepareels 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 on the outside has a hexagonal shape, wherein in each of the six Outer sides 3 of the hexagon ever a hole 1 1 is incorporated, which extends at an angle ⁇ to the outside.
  • FIG. 4 largely corresponds to that of FIG. 2, wherein only the Olabpoundbohrept, d. H. the recesses 11, here in the radial direction r, do not run at an angle a.
  • 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 holes can also be be taitet or that they hit the surface of a camshaft lenverstellsystem covering housing or other component.

Abstract

L'invention concerne une soupape de commande (1) d'un dispositif (2) servant à modifier la position angulaire relative d'un arbre à cames (3) par rapport à un vilebrequin d'un moteur à combustion interne, ladite soupape de commande présentant, dans une zone (4) opposée à l'arbre à cames (3), une conduite de fluide (5) servant à acheminer un fluide sous pression. Cette soupape de commande (1) présente, dans une zone centrale axiale (6), deux conduites de fluide (7, 8) servant à acheminer et à évacuer le fluide sous pression vers au moins deux chambres hydrauliques placées de façon à agir entre un élément d'entraînement (9) et l'arbre à cames (3) pour régler une position rotative relative définie entre l'élément d'entraînement (9) et l'arbre à cames (3), ladite soupape de commande (1) présentant, dans une zone (10) opposée à l'arbre à cames (3), une conduite de fluide (11) servant à évacuer le fluide vers un réservoir. L'objectif de l'invention est de réduire l'usure du dispositif. A cet effet, la conduite de fluide (11) servant à évacuer le fluide est formée dans une partie de préférence cylindrique creuse (12) de la soupape de commande (1) sous la forme d'au moins un évidement s'étendant à travers la partie de préférence cylindrique creuse (12) vers le côté extérieur (13) de cette dernière.
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 true EP2550437A1 (fr) 2013-01-30
EP2550437B1 EP2550437B1 (fr) 2016-04-20

Family

ID=44318107

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 (11)

* 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
DE102012208809B4 (de) 2012-05-25 2020-11-26 Schaeffler Technologies AG & Co. KG Steuerventil eines Nockenwellenverstellers
US20150144211A1 (en) * 2012-05-25 2015-05-28 Schaeffler Technologies Gmbh & Co. Kg Control valve of a camshaft adjuster
DE102012218802B4 (de) * 2012-10-16 2018-05-17 Schaeffler Technologies AG & Co. KG Steuerventil für ein Nockenwellenverstellersystem
WO2017050327A1 (fr) * 2015-09-21 2017-03-30 Schaeffler Technologies AG & Co. KG Soupape de commande pour un déphaseur d'arbre à cames
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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Also Published As

Publication number Publication date
US8733306B2 (en) 2014-05-27
EP2550437B1 (fr) 2016-04-20
WO2011117019A1 (fr) 2011-09-29
DE102010012479A1 (de) 2011-09-29
CN102822456A (zh) 2012-12-12
US20120325169A1 (en) 2012-12-27

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