EP2550437A1 - Control valve of a device for changing the relative angular position of a camshaft with respect to a crankshaft of an internal combustion engine - Google Patents
Control valve of a device for changing the relative angular position of a camshaft with respect to a crankshaft of an internal combustion engineInfo
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 48
- 239000003921 oil Substances 0.000 description 26
- 239000010720 hydraulic oil Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010012479 DE102010012479A1 (en) | 2010-03-24 | 2010-03-24 | Control valve of a device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine |
PCT/EP2011/051806 WO2011117019A1 (en) | 2010-03-24 | 2011-02-08 | Control valve of a device for changing the relative angular position of a camshaft with respect to a crankshaft of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2550437A1 true EP2550437A1 (en) | 2013-01-30 |
EP2550437B1 EP2550437B1 (en) | 2016-04-20 |
Family
ID=44318107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11704574.0A Not-in-force EP2550437B1 (en) | 2010-03-24 | 2011-02-08 | Control valve of a phasing device for adjusting the phase of a camshaft relative to the crankshaft in an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US8733306B2 (en) |
EP (1) | EP2550437B1 (en) |
CN (1) | CN102822456A (en) |
DE (1) | DE102010012479A1 (en) |
WO (1) | WO2011117019A1 (en) |
Families Citing this family (11)
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 (en) | 2012-01-12 | 2013-07-18 | Schaeffler Technologies AG & Co. KG | Camshaft adjustable system for use in camshaft of internal combustion engine i.e. reciprocating internal combustion engine, has line section connected with camshaft adjuster, and another line section throttled stronger than former section |
DE102012201567B4 (en) | 2012-02-02 | 2013-12-05 | Schaeffler Technologies AG & Co. KG | Design of a hydraulic oil channel between a central valve and a volume accumulator of a camshaft adjuster |
DE102012208809B4 (en) * | 2012-05-25 | 2020-11-26 | Schaeffler Technologies AG & Co. KG | Control valve of a camshaft adjuster |
CN104350241B (en) * | 2012-05-25 | 2016-12-14 | 舍弗勒技术股份两合公司 | The control valve of camshaft adjuster |
DE102012218802B4 (en) * | 2012-10-16 | 2018-05-17 | Schaeffler Technologies AG & Co. KG | Control valve for a camshaft adjuster system |
WO2017050327A1 (en) * | 2015-09-21 | 2017-03-30 | Schaeffler Technologies AG & Co. KG | Control valve for a camshaft adjuster |
WO2018019633A1 (en) * | 2016-07-27 | 2018-02-01 | ECO Holding 1 GmbH | Piston for a hydraulic unit of an oscillating adjuster and oscillating adjuster for a camshaft |
JP6769253B2 (en) * | 2016-11-14 | 2020-10-14 | アイシン精機株式会社 | Valve opening / closing timing control device |
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 (en) * | 2019-03-29 | 2023-07-14 | 日立Astemo株式会社 | Flow switching valve |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3810804A1 (en) * | 1988-03-30 | 1989-10-19 | Daimler Benz Ag | DEVICE FOR RELATIVE ANGLE ADJUSTMENT BETWEEN TWO DRIVES CONNECTED |
DE3825074C1 (en) * | 1988-07-23 | 1989-10-19 | Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
DE19611365C2 (en) * | 1996-03-22 | 1999-09-23 | Daimler Chrysler Ag | Device for the relative angular adjustment of a camshaft |
DE19916675B4 (en) * | 1999-04-14 | 2005-07-07 | Daimlerchrysler Ag | Device for relative angular adjustment of a camshaft |
DE10346443A1 (en) * | 2003-10-07 | 2005-05-04 | Daimler Chrysler Ag | Hydraulic camshaft adjuster for internal combustion engine, has electromagnetic operating unit for operating hydraulic control valve having valve housing with control piston for controlling supply of hydraulic fluid |
DE102005052481A1 (en) | 2005-11-03 | 2007-05-24 | Schaeffler Kg | Control valve for a device for the variable adjustment of the timing of gas exchange valves of an internal combustion engine |
JP2009138611A (en) * | 2007-12-05 | 2009-06-25 | Denso Corp | Valve timing adjustment device |
DE102008004591A1 (en) * | 2008-01-16 | 2009-07-23 | Schaeffler Kg | Hydraulic control valve with integrated check valve |
US7975663B2 (en) * | 2008-04-15 | 2011-07-12 | GM Global Technology Operations LLC | Dual-equal cam phasing with variable overlap |
DE102008030057B4 (en) | 2008-06-27 | 2018-01-25 | Hilite Germany Gmbh | Camshaft adjustment device |
DE102008039038B4 (en) * | 2008-08-21 | 2021-01-28 | Schaeffler Technologies AG & Co. KG | Camshaft adjuster |
DE102010002713B4 (en) * | 2010-03-09 | 2013-12-05 | Schwäbische Hüttenwerke Automotive GmbH | Camshaft phaser with control valve for the hydraulic adjustment of the phasing of a camshaft |
-
2010
- 2010-03-24 DE DE201010012479 patent/DE102010012479A1/en not_active Withdrawn
-
2011
- 2011-02-08 WO PCT/EP2011/051806 patent/WO2011117019A1/en active Application Filing
- 2011-02-08 US US13/583,070 patent/US8733306B2/en active Active
- 2011-02-08 CN CN2011800155789A patent/CN102822456A/en active Pending
- 2011-02-08 EP EP11704574.0A patent/EP2550437B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2011117019A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2550437B1 (en) | 2016-04-20 |
CN102822456A (en) | 2012-12-12 |
DE102010012479A1 (en) | 2011-09-29 |
US8733306B2 (en) | 2014-05-27 |
US20120325169A1 (en) | 2012-12-27 |
WO2011117019A1 (en) | 2011-09-29 |
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