EP0986703B1 - Einrichtung zum steuern eines elektromechanischen stellgeräts - Google Patents
Einrichtung zum steuern eines elektromechanischen stellgeräts Download PDFInfo
- Publication number
- EP0986703B1 EP0986703B1 EP98933511A EP98933511A EP0986703B1 EP 0986703 B1 EP0986703 B1 EP 0986703B1 EP 98933511 A EP98933511 A EP 98933511A EP 98933511 A EP98933511 A EP 98933511A EP 0986703 B1 EP0986703 B1 EP 0986703B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- controller
- voltage
- time
- current
- 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.)
- Expired - Lifetime
Links
Images
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
- H01F7/08—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
- H01F7/1844—Monitoring or fail-safe circuits
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
- F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
-
- 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
- H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
- H01F7/123—Guiding or setting position of armatures, e.g. retaining armatures in their end position by ancillary coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
Definitions
- the invention relates to a device for controlling a electromechanical actuator according to the preamble of the independent Claim. It particularly affects one Actuator for controlling an internal combustion engine.
- a known actuator (EP 0 400 389 A2) has an actuator and an actuator.
- the actuator includes an electromagnet with a core and a coil.
- the electromagnet is arranged in a housing.
- An anchor plate is movable arranged to the first electromagnet and is by a spring biased into a predetermined rest position. Around the anchor plate from its rest position in contact with the first Bringing electromagnets to the coil with a pull-in current excited.
- the pull-in current causes an electromagnetic Force the anchor plate against one by the spring caused force pulls on the electromagnet.
- the actuator is assigned a two-point controller with hysteresis, its controlled variable is the current through the coil and its manipulated variable is a pulse-shaped voltage signal that is applied to the coil becomes.
- EP 0 669 457 A1 describes a fuel injection device known in which a solenoid valve is provided at which the valve anchor plate is actuated by a control loop the control loop adjusts the voltage across the coil.
- the actual value of the current is used as the control variable compared with one setpoint or several setpoints and used for regulation.
- the power supply clocked depending on the supply voltage.
- EP 0 067 936 A2 is a two-point controller known for an electromagnet of a printer hammer, the Switching thresholds depend on the supply voltage. The setpoint of the controller depends on the Supply voltage.
- the object of the invention is a device for control of an electromechanical actuator that is simple and precise, especially timely, control of the actuator.
- the invention is characterized by the features of the independent claim solved.
- the solution is characterized by that a pulse width modulator is provided which the manipulated variable modulated depending on the supply voltage. So is a constant switching time regardless of fluctuations in the Supply voltage guaranteed.
- the switching time is defined than the amount of time that is needed around the anchor plate from a predetermined rest position against one by the Spring caused spring force to contact the electromagnet bring to.
- the constant switching time is an important one Advantage because the supply voltage, especially with one Motor vehicle, subject to major fluctuations.
- Another The advantage is that on an expensive and complex voltage regulator can be dispensed with because the current flow in the Switch-on phase of the controller, i.e. before reaching the control range of the controller, on average regardless of the time Supply voltage is always the same, although only one controller done by the controller.
- Actuator designed as a gas exchange valve and the actuator arranged in an internal combustion engine. So are constant Switching times of the gas exchange valve regardless of the supply voltage and thus a low-consumption and low-emission Operation of the internal combustion engine guaranteed.
- An actuator 1 ( Figure 1) comprises an actuator 11 and an actuator, for example as a gas exchange valve and a shaft 121 and a plate 122 Has.
- the actuator 11 has a housing 111 in which a first Electromagnet is arranged.
- the first electromagnet has a first core 112. In an annular groove of the first A first coil 113 is embedded in the core 112.
- the first Core 112 has a recess 114a, which acts as a guide for the Shaft 121 serves.
- An anchor plate 115 is in the housing 111 movably arranged to the first core 112.
- a first one Spring 116a tensions the anchor plate into a predetermined rest position R before.
- Actuator 1 is rigidly connected to a cylinder head 21.
- the cylinder head 21 is an intake port 22 and a cylinder 23 associated with a piston 24.
- the piston 24 is coupled to a crankshaft 26 via a connecting rod 25.
- a control device 4 is provided, the signals from sensors detected and control signals for the actuator 11 generated.
- the sensors are preferably used as a position transmitter 5, which detects a position X of the anchor plate 115 as a first ammeter 7a, which is the actual value I AV1 of the current the first coil 113 detected as a speed sensor 27, the Speed N of the crankshaft 26 detected, or as a load detection sensor 28, which is preferably an air mass meter or is a pressure sensor.
- a load detection sensor 28 which is preferably an air mass meter or is a pressure sensor.
- a voltage source 8 is provided, preferably as Generator, as a battery or as a parallel connection of the Generator and the battery is formed and the one supply voltage generated.
- the control device 4 comprises one Regulator, which preferably as a two-point regulator 41 Hysteresis is formed, the controlled variable of the current through is the coil 113 and the manipulated variable is a voltage, which is applied to the coil 113.
- the manipulated variable that is in the time course is a voltage signal is from a Pulse width modulator 42 depending on the supply voltage modulated.
- the modulated voltage signal is then one Driver 7a fed, which amplifies it and the first coil 113 feeds.
- FIG. 2a shows the time profile of the carrier signal S T of the pulse width modulator 42.
- Figure 2 b shows the time course of the modulated and amplified voltage signal U1
- Figure 2 c shows the associated Course of the actual value I_AV of the current through the first Coil 113.
- Figure 2d shows the time course of the position X of the anchor plate 115.
- the setpoint value of the current through the first coil 113 is a predetermined catch current I_F.
- armature plate 115 comes into contact with first core 112.
- the setpoint value of the current through first coil 113 is a predetermined holding current I_H.
- the two-point controller 41 with hysteresis accordingly specifies a voltage pulse as a voltage signal from the time t 1 to the time t 5 , which is modulated with the carrier signal S T and then amplified by the driver 7a, so that the curve shown in FIG. 2b changes from the time t 1 to t 5 results.
- the amplified and modulated voltage signal U1 is applied to the coil 113.
- the resulting actual value I_AV of the current can be clearly seen in FIG. 2c.
- the actual value I_AV of the current fluctuates from a time t 1 to a time t 5 around the time profile (dotted curve), as it results when the supply voltage has the minimum value U_Min.
- the anchor plate 115 comes into contact with the first core 112 at the time t 5a. From the time t 6 to the time t 7 , the setpoint I_SP1 of the current through the coil is the holding current I_H. Time t 6 is preferably chosen so that it is as close as possible to time t 5a . The impact of the anchor plate 115 is preferably determined by evaluating the position X. In a simple embodiment, the time interval between the times t 1 and t 6 can also be an experimentally determined, predetermined value.
- the setpoint value of the current through the first coil 113 changes from zero to the capture current I_F.
- the supply voltage has the minimum value U_Min.
- the pulse width T P of the carrier signal S T is therefore equal to the period T T.
- the carrier signal S T accordingly has a constant value from the time t 8 to the time t 12 .
- the time profile of the modulated and amplified voltage signal Ül corresponds to the voltage signal from time t 8 to time t 12 except for the change in amplitude caused by the amplification, that is to say the time profile of the manipulated variable of the two-point controller 41 to the system with the first core 112.
- the setpoint I_SP1 of the current through the coil 113 is the holding current I_H.
- the switching time which is determined by the time required to bring the armature plate from its open position, which corresponds to the rest position R in this exemplary embodiment, into its closed position C, that is to say in contact with the first electromagnet, is therefore independent of that Value of the supply voltage and approximately constant.
- the time interval between the times t 1 and t 5a and between the times t 8 and t 10 is approximately the same. This is an important advantage, since a precise switching duration is a prerequisite for precise charge control for the cylinder 23.
- FIG. 3 shows a further arrangement of the preferred embodiment of the actuator 1 with a further embodiment the control device 4 'according to the invention.
- the actuator 11 differs from that in FIG. 1 in that that it has a second electromagnet with a second core 117 and a second coil 118.
- the second Core 117 has a recess 114b, which also serves as a guide for the Shaft 121 serves.
- the anchor plate 115 is in the housing 111 moveable between the first core 112 and the second core 117 arranged.
- the first spring 116a and the second spring 116b tension the anchor plate in a predetermined rest position R before.
- the control device 4 'differs from the control device according to FIG. 1, a further two-point controller 43 with hysteresis, whose controlled variable is the current through the second coil 118 and the manipulated variable is one Voltage that is applied to the second coil 118.
- the two-point controller 43 generates a further voltage signal, another pulse width modulator 44 as a modulation signal is fed.
- the further voltage signal is in the further pulse width modulator 44 as well as in the pulse width modulator 42 modulated and then by driver 7b strengthened.
- the second coil 118 is modulated with the further one and corrected voltage signal.
- the first or second coil only with a significantly lower capture current I_F be applied because the spring-mass system can oscillate and only losses due to friction can be compensated have to.
- the actuator can also be used as an injection valve be trained.
- the control device 4, 4 ' can be designed as a microcontroller, but it can also a logic circuit or an analog circuit arrangement include.
- the controller or the further controller can for example also as a single-point controller with a timer or be designed as a pulse width modulation controller.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
- Figur 1
- eine Anordnung eines Stellgeräts mit einer ersten Ausführungsform der erfindungsgemäßen Einrichtung zum Steuern des Stellgeräts in einer Brennkraftmaschine,
- Figur 2
- Signalverläufe, aufgetragen über die Zeit t,
- Figur 3
- eine weitere Anordnung einer bevorzugten Ausführungsform des Stellgeräts mit einer weiteren Ausführungsform der erfindungsgemäßen Einrichtung zum Steuern des Stellgeräts.
Claims (4)
- Einrichtung zum Steuern eines elektromechanischen Stellgeräts, das Stellglied und einen Stellantrieb hat mit einer beweglichen Ankerplatte (117) und mit einem Elektromagneten, der einen Kern (112) und eine Spule (113) hat, wobei ein Regler vorgesehen ist, dessen Regelgröße der Strom durch die Spule (113) ist und dessen Stellgröße eine Spannung ist, die an der Spule (113) angelegt wird, wobeieine Spannungsquelle (8) vorgesehen ist, die eine Versorgungsspannung erzeugt, undein Pulsbreitenmodulator (42) vorgesehen ist, dadurch gekennzeichnet, daß der Pulsbreitenmodulator die Stellgröße ausgehend von einem Sprung des Sollwertes des Reglers zumindest bis zum Erreichen des Sollwertes durch den Istwert des Reglers abhängig von der Versorgungsspannung moduliert.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Stellglied einen weiteren Elektromagneten aufweist, der einen weiteren Kern (117) und eine weitere Spule (118) hat und der in einem vorgegebenen Abstand zu dem Elektromagneten angeordnet ist, daß ein weiterer Regler vorgesehen ist, dessen Regelgröße der Strom durch die weitere Spule (118) ist und dessen Stellgröße eine Spannung ist, die an der weiteren Spule (118) angelegt wird, unddaß ein weiterer Pulsbreitenmodulator (44) vorgesehen ist, der die Stellgröße abhängig von der Versorgungsspannung moduliert.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Stellglied als Gaswechselventil ausgebildet ist.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Regler als Zweipunktregler (41, 43) mit Hysterese ausgebildet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19723931 | 1997-06-06 | ||
DE19723931A DE19723931A1 (de) | 1997-06-06 | 1997-06-06 | Einrichtung zum Steuern eines elektromechanischen Stellgeräts |
PCT/DE1998/001318 WO1998055748A2 (de) | 1997-06-06 | 1998-05-12 | Einrichtung zum steuern eines elektromechanischen stellgeräts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0986703A2 EP0986703A2 (de) | 2000-03-22 |
EP0986703B1 true EP0986703B1 (de) | 2002-10-02 |
Family
ID=7831702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98933511A Expired - Lifetime EP0986703B1 (de) | 1997-06-06 | 1998-05-12 | Einrichtung zum steuern eines elektromechanischen stellgeräts |
Country Status (5)
Country | Link |
---|---|
US (1) | US6297941B1 (de) |
EP (1) | EP0986703B1 (de) |
JP (1) | JP2002506566A (de) |
DE (2) | DE19723931A1 (de) |
WO (1) | WO1998055748A2 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19908899B4 (de) * | 1998-12-03 | 2007-09-13 | Continental Teves Ag & Co. Ohg | Elektromagnetventil |
ATE223553T1 (de) * | 1999-05-27 | 2002-09-15 | Fev Motorentech Gmbh | Verfahren zur ansteuerung eines elektromagnetischen aktuators zur betätigung eines gaswechselventils an einer kolbenbrennkraftmaschine |
US6648297B1 (en) | 1999-06-18 | 2003-11-18 | Siemens Aktiengesellschaft | Method for controlling an electromechanical actuator |
DE19948489A1 (de) * | 1999-10-07 | 2001-04-12 | Heinz Leiber | Elektromagnetische Stelleinrichtung |
DE19954416A1 (de) * | 1999-11-12 | 2001-05-17 | Bayerische Motoren Werke Ag | Verfahren zum Anschwingen eines elektromagnetischen Aktuators |
DE10057900B4 (de) * | 2000-11-22 | 2007-04-12 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Vorrichtung zur Ansteuerung von Bremsventilen |
DE10121692B4 (de) * | 2001-05-04 | 2005-12-15 | Automotive Lighting Reutlingen Gmbh | Verfahren zur Ansteuerung eines Elektromagneten |
DE10130335C1 (de) * | 2001-06-26 | 2003-02-13 | Zf Lemfoerder Metallwaren Ag | Ver- und Entriegelungsmechanismus mit Elektromagnet |
JP3851140B2 (ja) * | 2001-10-30 | 2006-11-29 | ボッシュ株式会社 | 流量制御用電磁比例制御弁の駆動方法 |
DE10155969A1 (de) * | 2001-11-14 | 2003-05-22 | Bosch Gmbh Robert | Vorrichtung zur Ansteuerung eines elektromagnetischen Stellgliedes |
DE10227278B4 (de) * | 2002-06-19 | 2012-01-26 | Robert Bosch Gmbh | Ansteuerschaltung für ein elektromagnetisches Stellglied |
DE10315585A1 (de) * | 2003-04-05 | 2004-10-14 | Mahle Filtersysteme Gmbh | Verfahren zum Betätigen einer elektromagnetischen Stelleinrichtung |
DE10358858A1 (de) * | 2003-12-16 | 2005-07-14 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben einer induktiven Last mit unterschiedlichen elektrischen Spannungen |
JP2007071186A (ja) * | 2005-09-09 | 2007-03-22 | Toyota Motor Corp | 電磁駆動弁 |
WO2007080521A1 (en) * | 2006-01-11 | 2007-07-19 | Koninklijke Philips Electronics N. V. | Control of electrowetting lenses |
CN101866737A (zh) * | 2009-04-14 | 2010-10-20 | 杨泰和 | 高压启动低压通电保持的电磁致动装置 |
DE102010001004A1 (de) * | 2010-01-19 | 2011-07-21 | Robert Bosch GmbH, 70469 | Verfahren und Vorrichtung zur Ansteuerung von Aktuatoren |
CN102493886B (zh) * | 2011-11-30 | 2014-04-30 | 潍柴动力股份有限公司 | 一种喷油器开启时间修正方法及装置 |
US20150167589A1 (en) * | 2013-12-13 | 2015-06-18 | Hyundai Motor Company | Method and apparatus for controlling high pressure shut-off valve |
JP6056804B2 (ja) * | 2014-04-18 | 2017-01-11 | 株式会社デンソー | 電磁弁制御装置 |
US9546069B2 (en) | 2015-04-09 | 2017-01-17 | Microsoft Technology Licensing, Llc | Drive for electromechanical control of lines |
GB2558638A (en) * | 2017-01-13 | 2018-07-18 | Delphi Int Operations Luxembourg Sarl | Method to control the activation of a reductant doser |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4381532A (en) * | 1981-06-18 | 1983-04-26 | International Business Machines Corporation | Constant energy drive circuit for electromagnetic print hammers |
DE3129610A1 (de) * | 1981-07-28 | 1983-02-17 | Bosch und Pierburg System oHG, 4040 Neuss | Steuerschaltung fuer stellglieder |
EP0309755A1 (de) * | 1987-09-30 | 1989-04-05 | Siemens Aktiengesellschaft | Verfahren und Anordnung zum Steuern des Laststromes in einem Lastkreis mit einem induktiven Verbraucher, insbesondere mit einem Kraftstoffeinspritzventil |
DE3826978A1 (de) * | 1988-08-09 | 1990-02-15 | Meyer Hans Wilhelm | Elektromagnetisch betaetigbare stellvorrichtung |
KR0179987B1 (ko) * | 1989-05-19 | 1999-05-01 | . | 솔레노이드 동작 제어 방법 및 그 장치 |
FR2647981B1 (fr) * | 1989-05-30 | 1991-08-16 | Thomson Tubes Electroniques | Dispositif d'excitation pour actionneur electromagnetique |
US5053911A (en) | 1989-06-02 | 1991-10-01 | Motorola, Inc. | Solenoid closure detection |
DE4202805A1 (de) * | 1992-01-31 | 1993-08-05 | Robert Seuffer Gmbh & Co | Stromversorgungseinrichtung fuer die gesteuerte zufuehrung eines gleichstroms zur erregerwicklung eines betaetigungsmagneten, insbesondere eines magnetventils |
DE69320826T2 (de) * | 1992-03-26 | 1999-01-21 | Zexel Corp., Tokio/Tokyo | Kraftstoff-Einspritzvorrichtung |
DE19518056B4 (de) * | 1995-05-17 | 2005-04-07 | Fev Motorentechnik Gmbh | Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung |
DE29600866U1 (de) * | 1996-01-19 | 1996-03-07 | Festo Kg, 73734 Esslingen | Schaltungsanordnung zur Steuerung von Magnetventilen |
US5930103A (en) * | 1998-03-02 | 1999-07-27 | Motorola, Inc. | Control circuit for an electromechanical device |
-
1997
- 1997-06-06 DE DE19723931A patent/DE19723931A1/de not_active Withdrawn
-
1998
- 1998-05-12 DE DE59805814T patent/DE59805814D1/de not_active Expired - Fee Related
- 1998-05-12 EP EP98933511A patent/EP0986703B1/de not_active Expired - Lifetime
- 1998-05-12 JP JP50125099A patent/JP2002506566A/ja active Pending
- 1998-05-12 WO PCT/DE1998/001318 patent/WO1998055748A2/de active IP Right Grant
-
1999
- 1999-12-06 US US09/455,606 patent/US6297941B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19723931A1 (de) | 1998-12-10 |
JP2002506566A (ja) | 2002-02-26 |
WO1998055748A2 (de) | 1998-12-10 |
EP0986703A2 (de) | 2000-03-22 |
DE59805814D1 (de) | 2002-11-07 |
US6297941B1 (en) | 2001-10-02 |
WO1998055748A3 (de) | 1999-03-11 |
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