EP1430202A1 - Aktuator zur betätigung eines hubventils - Google Patents
Aktuator zur betätigung eines hubventilsInfo
- Publication number
- EP1430202A1 EP1430202A1 EP02797987A EP02797987A EP1430202A1 EP 1430202 A1 EP1430202 A1 EP 1430202A1 EP 02797987 A EP02797987 A EP 02797987A EP 02797987 A EP02797987 A EP 02797987A EP 1430202 A1 EP1430202 A1 EP 1430202A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- target ring
- actuator according
- plunger
- ring
- target
- 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
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 230000005291 magnetic effect Effects 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 7
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000007373 indentation Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims description 2
- 230000001133 acceleration Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000011282 treatment Methods 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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- 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
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
- Y10T137/8225—Position or extent of motion indicator
- Y10T137/8242—Electrical
Definitions
- the invention relates to an actuator for actuating a camshaft-less lift valve of an internal combustion engine, with an oscillating tappet coupled to the lift valve.
- the camshaft-less valve drives are often electromagnetic actuators.
- targets are provided on rams, the position of which can be determined by means of appropriately designed sensors.
- copper targets have mainly been used. A groove in the ram is filled with copper. The plunger is then usually machined on the outside, so that the area filled with copper merges seamlessly into the adjacent outer surface of the plunger.
- the invention provides an actuator that allows working with more sensitive sensors, so that an improved signal quality is achieved. This improvement is possible without a significant increase in manufacturing costs.
- an at least simply slotted target ring formed as a separate, prefabricated part and attached to the outer circumference of the plunger is made of a material based on Fe or a ferritic material.
- a target ring which is based on Fe or made of a ferritic material, can be used to use a sensor that operates at lower frequencies than a target made of copper.
- the signal quality can also be increased in that the target ring consists of a separate, prefabricated part. This means that the target ring is not attached to and after being attached to the plunger more thermally stressed than would be the case, for example, with melting application, in which the conversion process would occur in the material of the target ring, which would change its magnetic properties.
- a low-frequency induction sensor is preferably provided in the actuator, which detects the position of the target ring and thus of the plunger.
- the advantages of the invention are particularly evident.
- the previous eddy current based sensors have an excitation frequency between 100 kHz and 2 MHz. If the design and dimensions are retained and the frequency is switched to low frequencies (10-50 kHz), the eddy current principle no longer works effectively enough. In particular the signal-to-noise ratio deteriorates enormously. If one were to use a soft magnetic target made of a NiFe alloy, which has a high permeability, interference fields, e.g. the earth's magnetic field, cause changes in permeability that necessitate complex shielding.
- an induction sensor with a soft magnetic target, in particular made of an Fe alloy with about 3% silicon, enables the use of high application temperatures, creates manufacturing advantages and creates a sensor system with an extremely temperature-stable characteristic. Furthermore, due to the low permeabilities and higher coercive field strengths, such inductive sensor systems of actuators are less sensitive to electromagnetic interference fields, such as those that constantly occur in the vicinity of internal combustion engines.
- the target ring is a single slotted ring, it is preferably elastically expandable to the extent that it can be pushed onto the plunger from the outside.
- the tappet can have, for example, a circumferential groove for receiving the target ring. Then the axially or radially from the outside Target ring widened and pushed on, to then snap into the circumferential groove.
- the ring is designed so that the gap is hardly present after the ring has snapped into the groove.
- the target ring is to assemble it from two or more adjacent ring segments, preferably circular ring segments, which likewise form separate, prefabricated parts.
- This embodiment offers the advantage that the target ring does not have to be elastically deformed when fastened, but that the segments are simply inserted into the circumferential groove from radially outside the seat on the tappet.
- the target ring should be attached to the ram without any play or gaps.
- the target ring can be attached, for example, by plastically deforming the plunger to an area adjacent to the target ring and / or by plastically deforming the target ring, so that the target ring is held on the plunger in a non-detachable manner (i.e., only by destruction).
- This plastic forming is, for example, embossing, kneading, rolling or pressing.
- the target ring is clamped by this reshaping, but preferably a positive connection can also be created.
- the target ring could also be attached to the ram by soldering, welding or gluing.
- the target ring seen in longitudinal section, has an inside which has at least one radially inwardly projecting extension and / or at least one indentation.
- This extension or indentation can bring about a form fit in the circumferential direction and / or a form fit in the axial direction.
- the plunger should have a circumferential groove that is adapted to the geometry of the target ring for receiving the target ring.
- Another way to achieve a positive connection is to give the target ring a trapezoidal cross-sectional shape, seen in longitudinal section. The longer base of the trapezoid should form the inside.
- the actuator is preferably an electromagnetic actuator with one or two coils.
- the plunger forms the anchor shaft. This actuates the valve stem and is coupled to the valve stem or, if necessary, even connected in one piece.
- the target ring preferably consists of an Fe alloy with a silicon content of 1-5%, particularly preferably the silicon content is 3%.
- Such alloys can be processed well on the one hand and on the other hand allow higher working temperatures than e.g. NiFe alloys. Since their Curie temperature is around 750 ° C, continuous operating temperatures of up to 200 ° C are possible.
- the use of target rings made of such an alloy enables sensor systems with extremely temperature-stable characteristics with only slight deviations at high temperatures. Due to the low permeabilities and the high coercive field strength, sensor systems with such target rings are also less sensitive to electromagnetic interference fields, such as occur in the area of internal combustion engines, than sensor systems with targets made of a NiFe alloy or copper.
- the target ring made of an Fe alloy with a silicon content of 1-5%, in particular about 3%, and an actuator equipped with such a target ring are very advantageous regardless of claim 1 and represent significant innovations compared to the prior art that an unslit target ring and an actuator with an unslit target ring made of this alloy would have the advantages just mentioned.
- the senor comprises an outer sleeve made of a ferromagnetic or ferritic material such as a NiFe alloy with a nickel content of 72-83%.
- the sleeve serves on the one hand as a magnetic return line and on the other hand as a shield against external interference fields.
- the invention creates an actuator with a more sensitive sensor / target system, by means of which the signal quality and the accuracy of the position determination can be significantly increased.
- the manufacture of the target is inexpensive and its attachment to the plunger is simple and reliable. The fluctuations in the material properties of the target can also be reduced since the target is not thermally applied in a groove and thus does not change its material properties, but rather by attaching a prefabricated target to the plunger without being subjected to extreme temperature loads.
- FIG. 1 shows a longitudinal sectional view through an electromagnetic actuator without camshafts installed in an internal combustion engine, for actuating the lift valve of the internal combustion engine.
- FIGS. 2a to 2c show different embodiments of the target ring that can be used in the actuator according to the invention.
- FIGS. 3a to 3e show longitudinal sections through target rings which can be used in the invention according to three different embodiments.
- Figures 4a to 4c show successive method steps of attaching a target on the plunger in the actuator according to the invention.
- FIGS. 5a to 5c show successive method steps of another fastening of a target on the tappet in the actuator according to the invention.
- FIGS. 6a and 6b show successive method steps of yet another attachment of a target to a tappet in the actuator according to the invention.
- FIG. 7 shows a longitudinal sectional view of a sensor for detecting the position of the target in an actuator according to the invention.
- the actuator 14 comprises two electromagnets 16, 18 through which an armature or, more generally, a plunger 20 extends, which is connected at its lower end to the valve stem 22, so that the axial, oscillating movement of the plunger 20 is immediate a corresponding movement of the lift valve 12 causes.
- the axial movement of the plunger 20 should be path-controlled, which is why the position of the plunger must be determined as precisely and quickly as possible.
- An inductive sensor 24 surrounding the plunger and operating at low frequencies is provided for determining the position of the plunger 20. Radially inward of the sensor 24, a target ring 26 is fastened in a circumferential groove in the plunger 20 without play or gap. The sensor 24 determines the position of the target ring 26 and thus of the tappet 20 and the lift valve 22.
- the target ring 26 is made of a Fe-based material or a ferritic material.
- the target ring 26 according to all of the embodiments shown is a thin-walled, soft-magnetic ring made of an iron alloy with a silicon content of approximately 3%.
- the target ring is a separate, prefabricated part which is attached to the tappet.
- the plunger 10 is preferably a non-magnetic steel rod.
- FIG. 1 it can also be seen that the lift valve 12 is pressed into the closed position shown by a compression spring 30 acting on a spring plate 28 which is fastened to the valve stem 22.
- the target ring 26 is a simply slotted ring with such elasticity that it can be pushed axially or radially onto the outer circumference of the plunger 20 and engages in the circumferential groove.
- the dimensions and the geometry of the target ring 26 should be matched to the circumferential groove on the tappet 20 and thus the outer circumference in such a way that the slot 32 after the attachment to the tappet is small or no longer exists.
- the target ring 26 is attached to the plunger without play, which also applies to the other embodiments.
- the target ring is glued on the inside to the base of the circumferential groove.
- the target ring 26 consists of two ring segments 34, 36 which are simply inserted from the radially outside onto the tappet, more precisely into the circumferential groove which forms the outer circumference in sections.
- the segments, more precisely cylinder half-shells, 36 and 38 can also be fastened to one another or in the circumferential groove by welding, soldering or gluing or by the shaping methods which will be explained later.
- the target ring 26 can, as shown in Figure 3a, be circular cylindrical.
- a convex, circumferential extension projects radially inwards on the inside 46
- a circumferential indentation is provided, ie the inside 46 is concave.
- an extension 52 with a rectangular cross section protrudes, and according to FIG. 3e two corresponding extensions 54, 56 protrude radially inwards. This shape is intended to provide a better connection with the plunger can be reached, the groove of which should have a complementary shape corresponding to the geometry of the inside 46.
- FIGS. 4a to 4c show that the circumferential groove 60 has a trapezoidal shape in the original state, similar to a dovetail guide.
- a target ring 26 with a rectangular cross section, which can be slit one or more times, is inserted into the circumferential groove 60.
- the target ring 26 on its outer surface by e.g. Rolling or pressing plastically deformed and pressed into the circumferential groove so that it completely fills it.
- the volume of the target ring 26 is designed to be somewhat larger than the volume of the circumferential groove 60, so that, as shown in FIG.
- the material of the target ring 26 still protrudes radially.
- the plunger 20 together with the target ring is then ground on the outside until a cylindrical outer surface is created and there is no longer a joint between the target ring 26 and the outer circumference 62 of the plunger.
- the plunger has a rectangular circumferential groove 60 with annular beads 64 protruding radially to the side of the groove on both axial sides, which are produced either during prefabrication, for example turning the plunger 20, or by subsequent shaping.
- the target ring 26 has a trapezoidal shape in cross section, the longer base of the trapezoid forming the inside of the target ring.
- the annular beads 64 thus move axially to the target ring 26, and in the deformed state, the target ring 26 is accommodated in the annular groove 60 without a gap (FIG. 5b). Subsequently, the outside 62 of the plunger 20 together with the target ring is ground, as explained in FIG. 4c (see also FIG. 5c).
- the target ring 26 and the circumferential groove 60 have a rectangular cross-sectional shape, with a slight axial play between the target ring 26 and the side walls of the circumferential groove 60 in the inserted state, which is shown in FIG. 6a.
- the plunger is then reshaped in areas of the plunger directly adjacent to the target ring 26, for example by rolling, in such a way that grooves 70 are formed and the material of the plunger 20 is pressed in the direction of the target ring 26 in order to clamp it and at the same time form-fittingly in the circumferential groove 60 lock.
- the plunger 20 is deformed, but also the target ring 26.
- FIG. 7 shows an exemplary embodiment of a sensor 24 which can be used in all embodiments for detecting the position of the target ring 26.
- the sensor 24 comprises two first inner coils 100 connected in series and arranged next to one another, which are flanked by two second, outer coils 110.
- the two outer coils 110 are connected in series with the inner coils 100 and serve to compensate for edge effects of the sensor coils.
- the center tap of the first two coils 100 serves as a signal tap, so that an inductive half bridge is present.
- the coils 100, 110 are arranged on a coil body 120, which consists of a non-conductive material, preferably of plastic or ceramic, e.g. made of a glass and / or carbon fiber reinforced plastic.
- a bobbin 120 can also withstand high operating temperatures and can also be inexpensively manufactured in large numbers by injection molding.
- the sleeve serves for the magnetic return flow line by bundling the magnetic fields emerging from the coil system 100, 110, 120, so that the inevitable leakage flux is minimized. It also acts as a shield against interference fields.
- the plunger 20, which carries the target ring 26, extends through the coils 100, 110.
- the target ring 26 is a thin-walled, soft magnetic ring made of an iron alloy with a silicon content of approx. 3%.
- the target ring 26 is connected to the plunger 20 by one of the methods described above.
- a final annealing is carried out in this example for the targeted adjustment of the magnetic properties of the target ring 26. Apart from this final annealing, no further thermal treatment is required. Further, possibly required final treatments (e.g. grinding) only slightly change the magnetic properties of the target ring 26 set by the final annealing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20115060U DE20115060U1 (de) | 2001-09-12 | 2001-09-12 | Nockenwellenloser Aktuator für Betätigung eines Hubventils |
| DE20115060U | 2001-09-12 | ||
| PCT/EP2002/010260 WO2003023196A1 (de) | 2001-09-12 | 2002-09-12 | Aktuator zur betätigung eines hubventils |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1430202A1 true EP1430202A1 (de) | 2004-06-23 |
| EP1430202B1 EP1430202B1 (de) | 2007-11-14 |
Family
ID=7961626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02797987A Expired - Lifetime EP1430202B1 (de) | 2001-09-12 | 2002-09-12 | Aktuator zur betätigung eines hubventils |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7322374B2 (de) |
| EP (1) | EP1430202B1 (de) |
| DE (2) | DE20115060U1 (de) |
| WO (1) | WO2003023196A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20115060U1 (de) | 2001-09-12 | 2002-01-31 | TRW Deutschland GmbH, 30890 Barsinghausen | Nockenwellenloser Aktuator für Betätigung eines Hubventils |
| DE10218737A1 (de) * | 2002-04-26 | 2003-12-11 | Bayerische Motoren Werke Ag | Vorrichtung zum Justieren eines in einem Zylinderkopf einer Brennkraftmaschine angeordneten Hubaktuators für ein Gaswechselventil |
| DE20209369U1 (de) * | 2002-06-17 | 2002-10-31 | TRW Deutschland GmbH, 30890 Barsinghausen | Baugruppe für einen Aktuator und die Baugruppe enthaltender nockenwellenloser Aktuator |
| WO2007134287A1 (en) * | 2006-05-12 | 2007-11-22 | Parker-Hannifin Corporation | Displacement measurement device |
| DE102006045827A1 (de) * | 2006-09-22 | 2008-04-10 | Dichtungstechnik G. Bruss Gmbh & Co. Kg | Axialverschiebbares Bauteil insbesondere in einem Kraftfahrzeugmotor oder -getriebe |
| IT1401580B1 (it) * | 2010-07-29 | 2013-07-26 | Gea Niro Soavi Spa | Valvola di sicurezza meccanica per alte pressioni |
| DE202014102940U1 (de) * | 2014-06-27 | 2014-08-28 | Bürkert Werke GmbH | Ventil mit einem Stößel und einem Sensor |
| DE102014213869A1 (de) | 2014-07-16 | 2016-01-21 | Continental Automotive Gmbh | Sensorvorrichtung zum Bestimmen einer Verschiebung einer Welle |
| DE102016006491B4 (de) * | 2016-05-25 | 2019-03-07 | Audi Ag | Verfahren zum Betreiben einer Brennkraftmaschine sowie entsprechende Brennkraftmaschine |
| DE102017107403A1 (de) * | 2017-04-06 | 2018-10-11 | Kendrion (Villingen) Gmbh | Elektromagnetische Stellvorrichtung insbesondere zum Verstellen von Nockenwellen eines Verbrennungsmotors |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777255A (en) * | 1972-10-26 | 1973-12-04 | Westinghouse Electric Corp | Position sensor utilizing a primary and secondary shielded from one another by a ferromagnetic shield and a magnet whose position relative to the shield changes the shielding |
| JPS6046551B2 (ja) * | 1978-08-07 | 1985-10-16 | 株式会社日立製作所 | 半導体スイツチング素子およびその製法 |
| US4710709A (en) * | 1983-11-04 | 1987-12-01 | Allied Corporation | Magnetomechanical transducers utilizing resonant frequency shifts to measure displacement of an object |
| US4717874A (en) * | 1984-02-10 | 1988-01-05 | Kabushiki Kaisha Sg | Reluctance type linear position detection device |
| US4723503A (en) * | 1986-06-20 | 1988-02-09 | Yuda Lawrence F | Robotic control apparatus |
| DE3703867A1 (de) | 1987-02-07 | 1988-08-18 | Bayerische Motoren Werke Ag | Vorrichtung zum messen des hubweges von hubventilen |
| JPH0621531B2 (ja) | 1988-12-28 | 1994-03-23 | いすゞ自動車株式会社 | 電磁力駆動バルブの制御装置 |
| JP2639587B2 (ja) * | 1989-03-30 | 1997-08-13 | 株式会社いすゞセラミックス研究所 | バルブのステッピング駆動装置 |
| US5488566A (en) * | 1992-06-02 | 1996-01-30 | Eldec Corporation | Multi-coil impedance |
| US5579800A (en) * | 1994-07-05 | 1996-12-03 | Keystone International Holdings Corp. | Rotary valve position indicator and method |
| JPH11142103A (ja) * | 1997-11-06 | 1999-05-28 | Isuzu Ceramics Res Inst Co Ltd | 運動体及び運動体位置検出装置 |
| DE19918993A1 (de) * | 1999-03-23 | 2000-09-28 | Daimler Chrysler Ag | Vorrichtung mit einem elektromagnetischen Aktuator |
| FR2792765B1 (fr) * | 1999-04-23 | 2001-07-27 | Sagem | Actionneur lineaire electromagnetique a capteur de position |
| DE19922427A1 (de) * | 1999-05-14 | 2000-11-30 | Siemens Ag | Elektromagnetischer Mehrfachstellantrieb |
| JP3689614B2 (ja) * | 2000-03-21 | 2005-08-31 | 株式会社日立製作所 | 位置測定装置の磁石固定方法 |
| DE10023654A1 (de) | 2000-05-13 | 2001-11-22 | Daimler Chrysler Ag | Positionsdetektor |
| DE10024997A1 (de) * | 2000-05-22 | 2001-11-29 | Fev Motorentech Gmbh | Verfahren zur Erfassung der Ankerposition an einem elektromagnetischen Aktuator mittels Meßbrücke zur Regelung der Bewegung eines Gaswechselventils an einerKolbenbrennkraftmaschine |
| DE20115060U1 (de) | 2001-09-12 | 2002-01-31 | TRW Deutschland GmbH, 30890 Barsinghausen | Nockenwellenloser Aktuator für Betätigung eines Hubventils |
-
2001
- 2001-09-12 DE DE20115060U patent/DE20115060U1/de not_active Expired - Lifetime
-
2002
- 2002-09-12 DE DE50211220T patent/DE50211220D1/de not_active Expired - Lifetime
- 2002-09-12 WO PCT/EP2002/010260 patent/WO2003023196A1/de not_active Ceased
- 2002-09-12 EP EP02797987A patent/EP1430202B1/de not_active Expired - Lifetime
- 2002-09-12 US US10/489,290 patent/US7322374B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03023196A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE20115060U1 (de) | 2002-01-31 |
| US20050022876A1 (en) | 2005-02-03 |
| EP1430202B1 (de) | 2007-11-14 |
| DE50211220D1 (de) | 2007-12-27 |
| WO2003023196A1 (de) | 2003-03-20 |
| US7322374B2 (en) | 2008-01-29 |
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