WO1988002491A1 - Process and device for automatically detecting the response voltage of an electromagnetic component, in particular an electrovalve - Google Patents
Process and device for automatically detecting the response voltage of an electromagnetic component, in particular an electrovalve Download PDFInfo
- Publication number
- WO1988002491A1 WO1988002491A1 PCT/DE1987/000416 DE8700416W WO8802491A1 WO 1988002491 A1 WO1988002491 A1 WO 1988002491A1 DE 8700416 W DE8700416 W DE 8700416W WO 8802491 A1 WO8802491 A1 WO 8802491A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- electromagnetic component
- counter
- test voltage
- component
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/90—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using a simulated speed signal to test speed responsive control means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Definitions
- the invention relates to a method and a device for automatically detecting the response voltage of an electromagnetic component, in particular a solenoid valve.
- electromagnetic components in particular of solenoid valves, for example in injection systems and anti-lock systems of brake systems, must be checked frequently, for example in motor vehicles.
- Known methods and devices used for this purpose (DE-OS 23 52 493; DE-OS 22 51 472) evaluate the fact that the movement of a magnet armature in the coil of a solenoid valve causes a change in inductance. This has the consequence that the current intensity of the current flowing through the coil of the solenoid valve decreases during the movement of the armature. This change in the current strength is determined by means of a differentiating element and for the functional test of the solenoid valve used.
- the method according to the invention with the characterizing features of the main claim and the device for carrying out the method according to claim 11.
- the minimum response voltage of the component is automatically detected by applying an increasing test voltage to the electromagnetic component and recording and displaying the test voltage at which the electromagnetic component responds by the change in the response that occurs when the component is activated current flowing through the component is detected and used to fix and display the instantaneous value of the test voltage.
- the electromagnetic component is reacting at all, ie whether the solenoid valve is pulling in, but also at what minimum voltage it is responding to.
- the method and the device according to the invention enable simple and exact determination of the response voltage without the need to remove the electromagnetic component. Operator errors are excluded.
- Figure 1 A circuit diagram of the device, which reflects its principle function
- FIG 2 an embodiment of the device according to the invention according to Figure 1 and
- FIG. 3 a further exemplary embodiment of the device according to FIG. 1. Description of the execution examples
- FIG. 1 A basic circuit is shown in FIG. 1, by means of which the function of the device according to the invention and the method according to the invention are illustrated.
- a test voltage is generated from a voltage source e, here a sawtooth generator 2, which voltage is generated by an amplifier 4 and a voltage suitable for an electromagnetic component to be tested, of which only the actuating device or coil 6 is shown here strengthened. This voltage is applied to the coil 6, which on the other hand is connected to ground.
- the test voltage applied to the coil 6 can be displayed by a display device 8.
- a switching device 10 is provided in the feed line to the display device 8.
- the current flowing to the coil 6 of the test object is passed through a measuring resistor 12.
- the voltage drop there is measured by a differentiating arrangement 14, which comprises an operational amplifier 141.
- One side of the measuring resistor 12 is connected to the inverting input of the operational amplifier 141 via a first differentiating capacitor 142 and a first resistor 143.
- the other side of the measuring resistor 12 is connected via a second differentiating capacitor 144 and a second resistor 145 to the non-inverting input of the operational amplifier 141, which is negative-coupled via a third resistor 146.
- the non- The inverting input of the operational amplifier 141 is present via a fourth resistor 147. Dimensions.
- the output of the differentiating arrangement 14 or the operational amplifier 141 is connected to the switching device 10.
- the function of the circuit according to FIG. 1 is as follows:
- the coil 6 of the electromagnetic component to be tested for example an injection valve, is, without having to remove the valve, with the one generated by the sawtooth generator 2 and by the amplifier 4 increased test voltage.
- the minimum value of the test voltage is, for example, zero, in any case it must be less than the expected minimum response voltage of the electromagnetic component to be tested.
- the maximum test voltage corresponds, for example, to the maximum operating voltage of the test object.
- the current flowing through the coil 6 and thus through the measuring resistor 12 causes a voltage drop across the measuring resistor 12, which is measured by the differentiating arrangement 14. Due to the increasing voltage, an intact solenoid valve finally moves, its iron core or armature.
- This movement changes the inductance of the coil 6, in which a voltage is also induced. As a result, the current flow through coil 6 and measuring resistor 12 is reduced. The temporal derivation of the current or voltage in the differentiating arrangement 14 then changes the sign for a short time. This change is detected by the switching device 10. While the display device 8 previously displayed the test voltage applied to the coil 6 continuously when the circuit was first carried out, the switching device 10 now interrupts the connection between the coil 6 and the display arrangement 8 due to the differentiation arrangement 14 to the control device which acts as an opener switching device 10. The display arrangement now shows the last displayed value of the test voltage applied to the coil 6, since a further increase in the test voltage cannot be displayed due to the interruption of the supply line to the display arrangement 8 by the circuit device 10. The display arrangement 8 is designed so that the last instantaneous value of the test voltage remains displayed before the supply line is interrupted and the display does not go back to zero.
- the change in the current flow due to the response of the solenoid valve can also be evaluated in a second embodiment of the circuit for controlling the switching device 10 in such a way that the display device 8 only shows the test voltage applied to the test object when the test object responds.
- the switching device 10 is designed in such a way that it briefly establishes a connection to the display device 8 when the test object responds; however, a further rise in the test voltage is no longer displayed. The operator can then read no display from the display device 8 while the test voltage is still rising without the test specimen responding. This reduces the possibility of reading errors.
- the method can also be carried out in such a way that the operator who tests an electromagnetic component can freely choose between the two control options of the display device 8.
- FIG. 2 shows an embodiment of the device shown in FIG. 1, the same parts being provided with the same reference numerals.
- a rectangular or clock generator 20 controls a counter 22, the output signal of which is passed on to a digital / analog converter 24 (hereinafter D / A converter) and to a register 26 serving as a memory.
- D / A converter digital / analog converter 24
- a display device 8 is connected to the register 26.
- the signals of the counter 22 are converted and a voltage is generated which is amplified by an amplifier 4 to a value suitable for an electromagnetic component to be tested.
- an amplifier 4 here too, only the coil 6 of the test object is shown.
- the current flowing through the coil is passed through a measuring resistor 12 and the voltage drop across it is amplified by a differentiating arrangement 14 shown in detail in FIG. 1, the output of which is connected to the register 26.
- the response voltage of the electromagnetic component is determined as follows using the exemplary embodiment of the circuit according to FIG. 2: At the beginning of the measurement, the counter 22 and the register 26 are reset so that the display device 8 shows no voltage and the coil 6 of the test object is without voltage.
- the magnet armature of the coil 6 moves, as a result of which the inductance change explained above with reference to FIG. 1 occurs, which is detected by the differentiating arrangement 14 as a change in the current flow through the measuring resistor 12 or as a voltage change.
- a control signal is generated which is fed to the register 26.
- the register 26 which is designed as a memory, evaluates the counter status of the counter 22 and determines the counter value from it the test voltage applied to the coil 6 of the electromagnetic component. This voltage can be displayed by means of the display device 8 connected to the register 26.
- the circuit can also be designed so that the operator can read the test voltage on the display device 8 even during the rise.
- the circuit After reaching the maximum test voltage, the circuit is reset, i.e. the display of the response voltage is deleted, the test voltage goes back to the initial value. Then the process is repeated. As a result, the response behavior of the test object is checked several times and random results are avoided by comparing several display values at which the test object responds.
- FIG. 3 shows a further exemplary embodiment of the circuit shown in FIG. 1, the same parts again having the same reference numerals.
- a rectangular or clock generator 20 supplies a first counter 22 connected to a digital / analog converter 24 (hereinafter D / A converter) and a second counter 322 connected to a display device 8 with counting pulses. From the output signal of the as A binary counter designed first counter 22 is generated by means of the D / A converter 24 and an amplifier 4 a test voltage suitable for an electromagnetic component. Here too, only one coil 6 of the component to be tested is shown. As already explained with reference to FIGS. 1 and 2, the current conducted through the coil 6 flows through a measuring resistor. The voltage drop there is detected and evaluated by a differentiating arrangement 14 which is explained in detail in FIG. The output signal of the differentiating arrangement 14 is forwarded to the second counter 32.
- both counters 22 and 32 are reset, so that the display is at zero and the device under test is de-energized.
- the generation of the test voltage for the coil 6 of the electromagnetic component is identical to that of the circuit explained with reference to FIG. 2.
- the second counter 32 is designed as a multi-level decimal count and controls the numerical display of the display device 8.
- both counters are controlled by the same clock generator 20, they run synchronously. If it is determined with the help of the differentiating arrangement 14 in the manner described above that the electromagnetic component responds, the second counter 32 is controlled by the output signal of the differentiating arrangement 14. This counter is activated, for example, by setting an in The connecting line between the clock generator 20 and the second counter 32 has flip-flops, which is not shown in FIG. 3, is separated from other clock pulses and holds the test voltage present when the solenoid valve responds Value is displayed by the display device 8. Even if the test voltage is increased further, the display remains unchanged.
- the circuit can be designed in such a way that only the test voltage at which the solenoid valve has picked up is displayed, or in such a way that the rising test voltage can already be read. The operator can then monitor the test process, i.e. the rising voltage.
- both counters 22 and 32 are reset, i.e. the display is cleared and the test voltage is returned to the initial value. The procedure described is then repeated.
- the components mentioned with reference to the figure can be integrated in a circuit, for example in a motor vehicle diagnostic device or in an injection pump test bench, and the method can be part of a computer program for testing the function of a Motor vehicle or an injection pump.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Tests Of Electronic Circuits (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863633113 DE3633113A1 (de) | 1986-09-30 | 1986-09-30 | Verfahren und vorrichtung zur automatischen erfassung der ansprechspannung eines elektromagnetischen bauteils, insbesondere eines magnetventils |
DEP3633113.9 | 1986-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1988002491A1 true WO1988002491A1 (en) | 1988-04-07 |
Family
ID=6310628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1987/000416 WO1988002491A1 (en) | 1986-09-30 | 1987-09-12 | Process and device for automatically detecting the response voltage of an electromagnetic component, in particular an electrovalve |
Country Status (5)
Country | Link |
---|---|
US (1) | US4990854A (de) |
EP (1) | EP0324746A1 (de) |
JP (1) | JPH02500047A (de) |
DE (1) | DE3633113A1 (de) |
WO (1) | WO1988002491A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4011217A1 (de) * | 1990-04-06 | 1991-10-10 | Lucas Ind Plc | Verfahren zum ansteuern eines magnetventils einer schlupf-regelanlage |
GB2275541A (en) * | 1993-02-25 | 1994-08-31 | Westinghouse Electric Corp | Electromagnetic contactor |
EP3882944A1 (de) * | 2020-03-18 | 2021-09-22 | Samsung SDI Co., Ltd. | Pyrozünderschaltung und testverfahren |
US11605945B2 (en) | 2020-03-18 | 2023-03-14 | Samsung Sdi Co., Ltd. | Pyro igniter circuit and testing method |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922900A1 (de) * | 1989-07-12 | 1991-01-17 | Wabco Westinghouse Fahrzeug | Verfahren und schaltung zur ueberwachung von elektromagneten |
DE3936939A1 (de) * | 1989-11-06 | 1991-05-08 | Siemens Ag | Verfahren und einrichtung zur schaltkontrolle von magnetventilen in elektrohydraulischen ausbausteuerungen |
DE4010232A1 (de) * | 1990-03-30 | 1991-10-02 | Bosch Gmbh Robert | Einrichtung zum erkennen des schaltzustands eines stellglieds |
JP3105007B2 (ja) * | 1990-07-06 | 2000-10-30 | ジヤトコ・トランステクノロジー株式会社 | 電磁弁の故障検出装置 |
US5492009A (en) * | 1991-03-11 | 1996-02-20 | Siemens Aktiengesellschaft | Method and apparatus for testing a valve actuated by an electromagnet having an armature |
FR2681115A1 (fr) * | 1991-09-10 | 1993-03-12 | Heidelberger Druckmasch Ag | Circuit de controle d'un embrayage a commande electromagnetique. |
DE4232454C2 (de) * | 1992-09-28 | 1994-09-01 | Herion Werke Kg | Elektronische Schaltungsanordnung |
DE4443259A1 (de) * | 1993-11-29 | 1995-06-01 | Vaillant Joh Gmbh & Co | Verfahren zur Messung der Ankerlage |
DE19508329A1 (de) * | 1995-03-09 | 1996-09-12 | Teves Gmbh Alfred | Bremsdruckregelanlage |
US5796261A (en) * | 1995-05-08 | 1998-08-18 | Chrysler Corporation | Method and device for detecting solenoid actuation |
US6472877B1 (en) * | 1997-06-25 | 2002-10-29 | Chevron U.S.A., Inc. | Method and apparatus for measuring the opening time of a medium voltage air circuit breaker |
US6359435B1 (en) * | 1999-03-25 | 2002-03-19 | Siemens Automotive Corporation | Method for determining magnetic characteristics of an electronically controlled solenoid |
US6476599B1 (en) | 1999-03-25 | 2002-11-05 | Siemens Automotive Corporation | Sensorless method to determine the static armature position in an electronically controlled solenoid device |
FR2844055B1 (fr) * | 2002-08-22 | 2005-08-26 | Bosch Gmbh Robert | Procede et dispositif de commande d'essai |
US7165391B2 (en) | 2004-03-19 | 2007-01-23 | Ford Global Technologies, Llc | Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst |
US7055483B2 (en) * | 2004-03-19 | 2006-06-06 | Ford Global Technologies, Llc | Quick starting engine with electromechanical valves |
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US7194993B2 (en) * | 2004-03-19 | 2007-03-27 | Ford Global Technologies, Llc | Starting an engine with valves that may be deactivated |
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US7559309B2 (en) * | 2004-03-19 | 2009-07-14 | Ford Global Technologies, Llc | Method to start electromechanical valves on an internal combustion engine |
US7066121B2 (en) * | 2004-03-19 | 2006-06-27 | Ford Global Technologies, Llc | Cylinder and valve mode control for an engine with valves that may be deactivated |
US7032581B2 (en) * | 2004-03-19 | 2006-04-25 | Ford Global Technologies, Llc | Engine air-fuel control for an engine with valves that may be deactivated |
US7021289B2 (en) * | 2004-03-19 | 2006-04-04 | Ford Global Technology, Llc | Reducing engine emissions on an engine with electromechanical valves |
US7079935B2 (en) * | 2004-03-19 | 2006-07-18 | Ford Global Technologies, Llc | Valve control for an engine with electromechanically actuated valves |
US7140355B2 (en) * | 2004-03-19 | 2006-11-28 | Ford Global Technologies, Llc | Valve control to reduce modal frequencies that may cause vibration |
US7128687B2 (en) * | 2004-03-19 | 2006-10-31 | Ford Global Technologies, Llc | Electromechanically actuated valve control for an internal combustion engine |
US7031821B2 (en) * | 2004-03-19 | 2006-04-18 | Ford Global Technologies, Llc | Electromagnetic valve control in an internal combustion engine with an asymmetric exhaust system design |
US7072758B2 (en) * | 2004-03-19 | 2006-07-04 | Ford Global Technologies, Llc | Method of torque control for an engine with valves that may be deactivated |
US7063062B2 (en) * | 2004-03-19 | 2006-06-20 | Ford Global Technologies, Llc | Valve selection for an engine operating in a multi-stroke cylinder mode |
US7383820B2 (en) * | 2004-03-19 | 2008-06-10 | Ford Global Technologies, Llc | Electromechanical valve timing during a start |
US7107946B2 (en) * | 2004-03-19 | 2006-09-19 | Ford Global Technologies, Llc | Electromechanically actuated valve control for an internal combustion engine |
US7107947B2 (en) | 2004-03-19 | 2006-09-19 | Ford Global Technologies, Llc | Multi-stroke cylinder operation in an internal combustion engine |
US7128043B2 (en) * | 2004-03-19 | 2006-10-31 | Ford Global Technologies, Llc | Electromechanically actuated valve control based on a vehicle electrical system |
US7240663B2 (en) * | 2004-03-19 | 2007-07-10 | Ford Global Technologies, Llc | Internal combustion engine shut-down for engine having adjustable valves |
DE102008022953A1 (de) * | 2008-05-09 | 2009-11-26 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Vorrichtung und Verfahren zum Betreiben und Überwachen eines Magnetventils einer elektrischen Feststellbremse |
CN101324642B (zh) * | 2008-07-08 | 2011-06-08 | 奇瑞汽车股份有限公司 | 一种多通道电磁阀电流采集装置及采集方法 |
DE102010022109B3 (de) * | 2010-05-31 | 2011-09-29 | Continental Automotive Gmbh | Bestimmung des Schließzeitpunkts eines Einspritzventils basierend auf einer Auswertung der Ansteuerspannung unter Verwendung eines adaptierten Referenzspannungssignals |
DE102010032443A1 (de) * | 2010-07-28 | 2011-07-07 | Audi Ag, 85057 | Verfahren zum Bestimmen der Funktionsfähigkeit einer Sperrvorrichtung sowie Sperrvorrichtung mit einer Diagnoseeinheit |
US10901035B2 (en) * | 2019-02-01 | 2021-01-26 | Intel Corporation | Techniques in ensuring functional safety (fusa) systems |
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DE2251472A1 (de) * | 1972-10-20 | 1974-04-25 | Bosch Gmbh Robert | Schaltungsanordnung zum kontrollieren der mechanischen bewegung eines magnetventilankers |
DE2450637A1 (de) * | 1974-10-24 | 1976-04-29 | Siemens Ag | Schaltungsanordnung zum messen des erregungsmehrbedarfs oder der ansprechzeitverzoegerung von haftenden kontakten von relais |
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JPS58190778A (ja) * | 1982-04-30 | 1983-11-07 | Matsushita Electric Works Ltd | リレ−の検査装置 |
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DE2704289C2 (de) * | 1977-02-02 | 1985-06-27 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Prüfung von Relaiswicklungen |
SU661443A1 (ru) * | 1977-05-10 | 1979-05-05 | Серпуховское Высшее Военное Командное Училище Им.Ленинского Комсомола | Устройство дл измерени временных параметров реле |
SU748354A1 (ru) * | 1978-06-01 | 1980-07-15 | Ленинградское Научно-Производственное Объединение "Северная Заря" | Устройство дл контрол регулировочных параметров герметизированных электромагнитных реле |
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-
1986
- 1986-09-30 DE DE19863633113 patent/DE3633113A1/de not_active Withdrawn
-
1987
- 1987-09-12 WO PCT/DE1987/000416 patent/WO1988002491A1/de not_active Application Discontinuation
- 1987-09-12 JP JP62505318A patent/JPH02500047A/ja active Pending
- 1987-09-12 EP EP19870905720 patent/EP0324746A1/de not_active Ceased
- 1987-09-12 US US07/348,666 patent/US4990854A/en not_active Expired - Fee Related
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Title |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4011217A1 (de) * | 1990-04-06 | 1991-10-10 | Lucas Ind Plc | Verfahren zum ansteuern eines magnetventils einer schlupf-regelanlage |
GB2275541A (en) * | 1993-02-25 | 1994-08-31 | Westinghouse Electric Corp | Electromagnetic contactor |
GB2275541B (en) * | 1993-02-25 | 1997-04-16 | Westinghouse Electric Corp | Electronic interlock for electromagnetic contactor |
EP3882944A1 (de) * | 2020-03-18 | 2021-09-22 | Samsung SDI Co., Ltd. | Pyrozünderschaltung und testverfahren |
CN113492679A (zh) * | 2020-03-18 | 2021-10-12 | 三星Sdi株式会社 | 烟火点火器电路及测试方法 |
US11605945B2 (en) | 2020-03-18 | 2023-03-14 | Samsung Sdi Co., Ltd. | Pyro igniter circuit and testing method |
CN113492679B (zh) * | 2020-03-18 | 2024-06-11 | 三星Sdi株式会社 | 烟火点火器电路及测试方法 |
Also Published As
Publication number | Publication date |
---|---|
US4990854A (en) | 1991-02-05 |
JPH02500047A (ja) | 1990-01-11 |
DE3633113A1 (de) | 1988-03-31 |
EP0324746A1 (de) | 1989-07-26 |
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