EP3520125A1 - Elektromagnetisches stellsystem sowie betriebsverfahren - Google Patents
Elektromagnetisches stellsystem sowie betriebsverfahrenInfo
- Publication number
- EP3520125A1 EP3520125A1 EP17771685.9A EP17771685A EP3520125A1 EP 3520125 A1 EP3520125 A1 EP 3520125A1 EP 17771685 A EP17771685 A EP 17771685A EP 3520125 A1 EP3520125 A1 EP 3520125A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- operating state
- adjusting
- control
- induction signal
- 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
- 238000011017 operating method Methods 0.000 title description 3
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 230000006698 induction Effects 0.000 claims description 30
- 238000011156 evaluation Methods 0.000 claims description 26
- 230000004044 response Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000001846 repelling effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 3
- 230000003993 interaction Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/064—Circuit arrangements for actuating electromagnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
- H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/081—Magnetic constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1872—Bistable or bidirectional current devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F2007/1669—Armatures actuated by current pulse, e.g. bistable actuators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F2007/1684—Armature position measurement using coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F2007/1692—Electromagnets or actuators with two coils
Definitions
- the invention relates to an electromagnetic control system, in particular a Ventiltriebverstellsystem for internal combustion engines, preferably in motor vehicles, according to the preamble of claim 1, comprising a bistable electromagnetic actuator with an adjustable along an adjustment between a retraction position and a Ausschubposition, at least partially permanent magnet means having, in particular supporting, Control element for interacting with a control partner, in particular a cam follower, wherein the permanent magnet means are adjustable by adjusting the adjusting element along the adjustment axis between a first and a second, axially spaced core region, and in the retraction position of the actuating element with a permanent magnetic holding force on the first core region and in hold the Ausschubposition of the actuating element with a permanent magnetic holding force to the second core region, in particular adhere , and with a first and a second coil means, which are controllable via drive means, and the drive means are the first and the second coil means controlled such that in a first operating state for adjusting the actuating element from the retraction position to
- the first and the second core area serve as axial stops for the adjusting element, which then abuts the Verstellendpositionen to each core area.
- the permanent magnet means are enclosed between two axially spaced pole discs, which then abut in the end positions directly on the respective core region.
- the pole disks in particular have a mechanical protective function in the axial abutment of the actuating element for the generally brittle permanent magnet means.
- the permanent magnet means are preferably magnetized in the axial direction.
- Such electromagnetic control systems are used in particular for camshaft adjustment when the actuator is not automatically reset by rotation of the camshaft after the camshaft adjustment from the Ausschubposition in the retraction position.
- the actuator In such Nockenverstellsystemen the actuator must be actively adjusted via the second coil means back to the retraction position.
- the adjusting movement of the actuating element is monitored by a control element associated with the Hall sensor arranged in a region between the coil means.
- camshaft adjusting systems described in the applicant's DE 102 40 774 B4 are known whose electromagnetic actuating device comprises only a single coil device with which the actuating element carrying permanent magnet means can be accelerated in the direction of its ejection position. The rear skewing takes place in such control systems by mechanical application of force to the actuating element via the camshaft. From DE 10 2004 030 779 A1 another, not generic electromagnetic control system with a single coil device is known.
- This coil device serves as a sensor coil for the detection of an induction signal, which is generated by the mechanical remindvers notorious of the actuating element from the Ausschubposition in the retraction position in order to detect a malfunction of the valve lift back to the retraction position in the absence of induction signal can.
- the known adjusting device is not suitable for use in control tasks in which no automatic,versander the actuator is given, since the actuator then stick with its permanent magnet means permanent magnet in the Ausschubposition. In addition, no malfunctioning with respect to the adjustment of the actuating element from the feed position to the Ausschubposition can be detected with the known control system.
- Generic control systems are used in the context of automotive valve trains of internal combustion engines for switching cam followers, such as toggle levers, for actuating gas exchange valves with different valve lifts and / or valve timing or their temporary deactivation.
- the present invention seeks to provide an improved control system, in particular for adjusting a cam follower as part of a valve train of a motor vehicle engine comprising a bistable electromagnetic actuator whose
- Permanent magnet means exhibiting actuator with two coil devices active electromagnetically in two opposite axial directions is adjustable and also by extended diagnostic and monitoring options in terms of a proper adjustment of the control element is characterized. In a preferred embodiment, it should be possible to check adjusting movements of the adjusting element in both axial directions. It should be possible to dispense with the (additional) Hall sensor necessary in the prior art.
- the object is to provide a correspondingly improved operating method for such an electromagnetic control system.
- the second coil means evaluation means for detecting an adjustable by adjusting the adjusting element along the adjustment axis from the retraction position to the Ausschubposition induction signal, in particular an electrical voltage signal are assigned, and that the drive means are designed such that they switch the second coil means in the first operating state at least during a detection phase for detecting the induction signal, preferably during the entire first operating state, energized (de-energized), and / or that the first coil means evaluation for detecting an induction signal, in particular an electrical voltage signal, which can be generated by adjusting the adjusting element along the adjustment axis from the ejection position into the pull-in position Is, are assigned, and that the drive means are designed such that these switch the first coil means in the second operating state, at least during a detection phase for detecting the induction signal, preferably during the entire second operating state, de-energized (de-energized).
- the drive means are designed such that these switch the first coil means in the second operating state, at least during a detection phase for detecting the induction signal,
- the invention is based on the idea to control a generic electromagnetic control system or its bistable electromagnetic actuator such that in the first operating state (operating mode) in which the actuator is adjusted by energizing the first coil means from the retraction position to the Ausschubposition the second coil means as Sensor coil is used.
- these evaluation means are associated with which an induction signal, in particular an electrical voltage signal is detectable, which is generated by electromagnetic induction, when the permanent magnet means having actuator is adjusted by energizing the first coil means axially along the adjustment axis of the retraction position to the Ausschubposition.
- the second Coil means is connected so that it is at least temporarily de-energized during the first operating state, in particular during energization of the first coil means. It is particularly preferred if this de-energized state continues over the entire time duration of the first operating state, ie from the beginning of the energization of the first coil device until reaching the ejection position by the actuating element. During the de-energized period of time of the second coil device in the first operating state, this is thus not available for an electromagnetic application of force to the actuating element in support of its adjustment movement.
- the embodiment of the invention described above it is now possible to monitor in a generic control system, (if at all) whether and / or whether timely within predetermined time limits, an adjustment of the control element from the pull-out position is carried out in the Ausschubposition.
- an actuating system in addition to the above-described embodiment variant or functionality of an actuating system according to the invention, it is provided that, in particular, a monitoring of the actuating operation from the Ausschubposition back into the retraction position is realized by the second operating state (operating mode) of the first coil means previously explained Sensor coil functionality is assigned by this evaluation are assigned to detect an induction signal, in particular an electromagnetic voltage signal which is induced by the actuator in the first coil means when the actuator accelerated or adjusted by energizing the second coil means from the Ausschubposition in the direction of retraction position becomes.
- the first coil device In order for the first coil device to be able to fulfill its sensor coil functionality, it is provided according to the invention that these are actuated by the actuation means at least temporarily during the second operating state, in particular while the second coil device is energized or is, is not energized. It is very particularly preferred if the first coil device is de-energized over the entire duration of the second operating state, ie from the beginning of the energization of the second coil device until reaching the retraction position by the control element.
- the magnetically conductive actuating element has, at least in sections, permanent magnet means, which in turn are accommodated or arranged at least in sections, preferably completely between the two core regions, and are adjustable between the core regions.
- the permanent magnet means are disc-shaped and arranged on or on a plunger or tappet portion of the adjusting element, which may be formed in one or more parts and, as will be explained later, in particular exclusively, the second core region axially interspersed with an engaging portion, in particular an end portion to cooperate with a control partner, in particular a camshaft follower, in particular to switch this in the context of a valve train of a motor vehicle engine, for example, to operate at least one gas exchange valve with different valve strokes and / or different timing or its Zeitweiser deactivation.
- a plunger or tappet portion of the adjusting element which may be formed in one or more parts and, as will be explained later, in particular exclusively, the second core region axially interspersed with an engaging portion, in particular an end portion to cooperate with a control partner, in particular a camshaft follower, in particular to switch this in the context of a valve train of a motor vehicle engine, for example, to operate at least one gas exchange valve with different valve strokes and / or different timing
- the evaluation or detection of the induction signal of the on-board diagnosis of engine control systems used to monitor the valve lift adjustment with functional verification.
- it can be detected with the system according to the invention whether a requested or controlled adjusting movement of the actuating element was successful axially in the direction of the ejection position and / or axially in the direction of the retraction position, i.
- the evaluation means and / or the control means know the actual or current position of the control element and can take this into account accordingly.
- the evaluation means emit a corresponding error signal in response to an absence of an induction signal and / or a time-delayed induction signal, which characterizes an adjustment movement which has not taken place or which has been delayed and / or the evaluation means store a corresponding one error information.
- the evaluation means may be designed to output a corresponding acknowledgment signal in response to a, in particular timely, received induction signal and / or to store a corresponding acknowledgment information.
- control means are designed to output a renewed drive signal to the first or second coil device in response to a lack of an induction signal to adjust the actuator after not successful adjusting movement in the desired axial direction or to drive again in this direction ,
- the adjusting device of the actuating system it is preferred, in particular with regard to cam follower switching tasks, when the actuating element is arranged axially passing through the second core region with a tappet section.
- a corresponding passage opening in particular through-bore, is preferably provided in the second core area for this purpose.
- the adjusting element it is particularly expedient for the adjusting element to penetrate axially only the second core region, but not for the first core region, which in that respect preferably then has no axial passage opening.
- Such an adjusting device is characterized in that the adjusting element penetrates only one end of a housing of the adjusting device.
- the actuator is associated with a control partner in the context of the system, in particular a cam follower, which is characterized in that no or at least no sufficient mechanical restoring force is exerted by this for adjusting the actuating element from the Ausschubposition in the retraction position or exercisable.
- the first coil means in particular by the provision of a larger number of windings, is dimensioned more powerful than the second coil means, as in particular the adjustment of the Retraction position in the Ausschubposition is time-critical, while the remindvers republic can take a longer period of time.
- the evaluation means in particular the two embodiments executed at the outset for detecting an induction signal for adjusting both in the one and in the other axial means and the drive means for the coil means of a common logic unit, in particular a motor control are formed.
- FIG. 1 is a highly schematic representation of a preferred embodiment of an electromagnetic actuating system according to the invention.
- electromagnetic control system 1 in the present example, a Ventiltriebverstellsystem for internal combustion engines, especially in motor vehicles, shown.
- the electromagnetic actuating system 1 comprises a bistable, electromagnetic actuating device 2 with an actuating element 3 which can be displaced along an adjustment axis V between an illustrated retraction position E and an axially displaced ejection position A.
- the actuating element 3 comprises a magnetically conductive plunger section 4 which carries axially magnetized permanent magnet means 5, which are arranged axially between two magnetically conductive, preferably metallic pole disks 6, 7. In the retracted position E, the actuating element 3 is shown with a held by the permanent magnet means 5 permanent magnetic holding force to a first core region 8.
- the permanent magnet means 5 are located within a magnetic flux-conducting actuator housing 15, via which the two, preferably mutually produced by the two coil devices 10, 1 1 magnetic flux circuits are closed.
- the actuating element 3 adheres via a permanent magnetic adhesive force of the permanent magnet means 5 in an analogous manner to a second core region 9, which is axially spaced from the first core region 8.
- the core regions 8, 9 simultaneously form axial stops for the adjusting element 3, in that the pole disks 6, 7 rest in the corresponding position on the respective core region 8, 9.
- the adjusting device 2 comprises a first coil device 10, which in the present case surrounds the first core region 8 radially outside.
- the adjusting device 2 comprises a further axially spaced, second coil device 1 1, which surrounds the second core region 9.
- the two coil devices 1 0, 1 1 are associated with control means 12, as well as later to be explained evaluation means 13, wherein control means 12 and evaluation means 13 are formed by common logic means 14.
- the control means 12 control the first coil device 10 with a drive signal (electrical energization), on the basis of which the first coil device 10 generates a magnetic field which counteracts the permanent magnetic magnetic field.
- the first coil device 10 generates a counterforce to the permanent-magnetic holding or adhesive force of the permanent magnet means 5 by the drive signal, as a result of which Permanent magnet means 5 and the actuator 3 are repelled from the first core portion 8 in the direction of Ausschubposition A, causing the actuator 3 moves into its Ausschubposition A and thus the plunger section 4 is axially moved further out of the Stellvoriquessgephase 15 to a Stellpartner, not shown , in the present case cooperate by way of example a cam follower in a conventional manner.
- the actuating element 3 for this purpose passes through a central passage opening 16 in the second core area 9 - the first core area 8 is closed or has no passage opening 16.
- the control means 12 switch during this first operating state, the second coil means 1 1, which is designed less powerful than the first coil means 1 0 de-energized.
- the second coil device 1 1 has the function of a sensor coil in which an induction signal, in the present case an electrical voltage is induced by the previously described adjusting movement from the retraction position E to the Ausschubposition A.
- This is detected by the evaluation means 13 and further processed, in particular in cooperation with the control means 12. In this way it is possible to monitor the Ausschubvorgang or actuation process for actuating the control partner. It is thus detectable whether the desired or controlled adjusting movement of the actuating element 3 actually takes place or has taken place.
- a second operating state the control element 3 located in the ejection position A is moved back into the retracted position E shown.
- the control means 12 control the second coil means 1 1 with a drive signal which exerts a repulsive counterforce to the permanent magnetic holding force on the control element 3, whereby this from the second core region 9 in Direction towards the first core area 8 is repelled.
- the control means 12, the first coil means 1 0 energized, which thereby has the functionality of a sensor coil and detects an induction signal, which by the axial adjustment movement of the control element 3 with its permanent magnet means 5 in the winding of the first coil means 10 in the form of an electrical Voltage is induced.
- This induction signal in the present case an electrical voltage signal, is detected by the evaluation means 13 and, preferably, further processed together with the control means 12. In this way it is possible to monitor an adjusting movement of the adjusting element 3 from the Ausschubposition A back to the retraction position E.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Valve Device For Special Equipments (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016118254.0A DE102016118254A1 (de) | 2016-09-27 | 2016-09-27 | Elektromagnetisches Stellsystem sowie Betriebsverfahren |
PCT/EP2017/072323 WO2018059890A1 (de) | 2016-09-27 | 2017-09-06 | Elektromagnetisches stellsystem sowie betriebsverfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3520125A1 true EP3520125A1 (de) | 2019-08-07 |
EP3520125B1 EP3520125B1 (de) | 2021-04-21 |
Family
ID=59930320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17771685.9A Active EP3520125B1 (de) | 2016-09-27 | 2017-09-06 | Elektromagnetisches stellsystem sowie betriebsverfahren |
Country Status (5)
Country | Link |
---|---|
US (1) | US10910137B2 (de) |
EP (1) | EP3520125B1 (de) |
CN (1) | CN109791828B (de) |
DE (1) | DE102016118254A1 (de) |
WO (1) | WO2018059890A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016118254A1 (de) | 2016-09-27 | 2018-03-29 | Eto Magnetic Gmbh | Elektromagnetisches Stellsystem sowie Betriebsverfahren |
DE102018209397A1 (de) * | 2018-06-13 | 2019-12-19 | Mahle International Gmbh | Ventilantriebsvorrichtung mit Umschalteinrichtung |
CN111564277A (zh) * | 2020-06-24 | 2020-08-21 | 上海虹昱轨道交通科技发展有限公司 | 一种节能型双稳式永磁保持电磁铁 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB958501A (en) * | 1959-07-03 | 1964-05-21 | Philips Electrical Ind Ltd | Improvements in electromagnetic devices in which a body is moved between two stable end positions |
US5203172A (en) * | 1990-05-17 | 1993-04-20 | Simpson Alvin B | Electromagnetically powered hydraulic engine |
DE19518056B4 (de) * | 1995-05-17 | 2005-04-07 | Fev Motorentechnik Gmbh | Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung |
DE10141764A1 (de) * | 2000-10-20 | 2002-06-27 | Micro Epsilon Messtechnik | Vorrichtung und Verfahren zur Detektion der Position eines Objekts |
DE20114466U1 (de) | 2001-09-01 | 2002-01-03 | Eto Magnetic Kg | Elektromagnetische Stellvorrichtung |
DE20203718U1 (de) | 2002-03-07 | 2002-07-04 | Eto Magnetic Kg | Elektromagnetische Stellvorrichtung |
DE102004030779A1 (de) | 2004-06-25 | 2006-01-19 | Audi Ag | Verfahren zur Diagnose der Funktionalität einer Ventilhubverstellung einer Brennkraftmaschine |
DE102011103169B4 (de) * | 2011-06-01 | 2017-03-02 | Gerhard Kirstein | Elektromagnetischer Antrieb, Antriebsanlage und deren Verwendung |
DE102011081893B3 (de) * | 2011-08-31 | 2012-11-15 | Siemens Aktiengesellschaft | Magnetischer Aktor und Verfahren zu dessen Betrieb |
DE102016118254A1 (de) | 2016-09-27 | 2018-03-29 | Eto Magnetic Gmbh | Elektromagnetisches Stellsystem sowie Betriebsverfahren |
-
2016
- 2016-09-27 DE DE102016118254.0A patent/DE102016118254A1/de not_active Withdrawn
-
2017
- 2017-09-06 EP EP17771685.9A patent/EP3520125B1/de active Active
- 2017-09-06 CN CN201780059580.3A patent/CN109791828B/zh active Active
- 2017-09-06 US US16/337,024 patent/US10910137B2/en active Active
- 2017-09-06 WO PCT/EP2017/072323 patent/WO2018059890A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
US20200032681A1 (en) | 2020-01-30 |
WO2018059890A1 (de) | 2018-04-05 |
EP3520125B1 (de) | 2021-04-21 |
US10910137B2 (en) | 2021-02-02 |
CN109791828A (zh) | 2019-05-21 |
DE102016118254A1 (de) | 2018-03-29 |
CN109791828B (zh) | 2021-01-05 |
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