EP1005051B1 - Verfahren zur Ansteuerung eines elektromagnetischen Verbrauchers - Google Patents

Verfahren zur Ansteuerung eines elektromagnetischen Verbrauchers Download PDF

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Publication number
EP1005051B1
EP1005051B1 EP99114827A EP99114827A EP1005051B1 EP 1005051 B1 EP1005051 B1 EP 1005051B1 EP 99114827 A EP99114827 A EP 99114827A EP 99114827 A EP99114827 A EP 99114827A EP 1005051 B1 EP1005051 B1 EP 1005051B1
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EP
European Patent Office
Prior art keywords
current
time
time window
value
duration
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
Application number
EP99114827A
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German (de)
English (en)
French (fr)
Other versions
EP1005051A2 (de
EP1005051A3 (de
Inventor
Klaus Zimmermann
Michael Straehle
Tobias Lang
Bernd Wichert
Klaus Sassen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1005051A2 publication Critical patent/EP1005051A2/de
Publication of EP1005051A3 publication Critical patent/EP1005051A3/de
Application granted granted Critical
Publication of EP1005051B1 publication Critical patent/EP1005051B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • 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 method for controlling an electromagnetic consumer according to the preambles of the independent claim.
  • a method for controlling an electromagnetic consumer is known from DE-OS 44 20 282.
  • a device for driving a consumer is described, which comprises a movable element.
  • the consumer is a solenoid valve for controlling the fuel metering in an internal combustion engine.
  • a switching time is detected at which the movable element reaches a certain position. This is done by evaluating the time course of a quantity corresponding to the current flowing through the load.
  • the voltage applied to the consumer is regulated or controlled to a constant value.
  • the supply lines to the load are low-impedance, so that the currents at a constant voltage reach a higher level than in normal operation. If a current monitoring is provided, which shuts off the power amplifier from a certain threshold value of the current, this can lead to the output stage being switched off by the current monitoring.
  • the invention is based on the object, in a method for controlling an electromagnetic load of the type mentioned, the duration of the time window within which the switching time is detected to specify suitable.
  • the time window should be sufficiently large so that the switching time can be detected.
  • the time window should be so small that it does not lead to an increase in current to impermissible values and thus to a shutdown of the power amplifier.
  • FIG. 1 shows a schematic representation of the output stage
  • FIG. 2 shows various signals applied over time
  • FIG. 3 shows a flow chart for clarifying the procedure according to the invention.
  • the consumer is in particular a solenoid valve for controlling the fuel metering in an internal combustion engine.
  • the consumer comprises a movable element, which is usually referred to as a valve needle in a solenoid valve.
  • FIG. 1 shows a device based on a block diagram.
  • a consumer 100 is connected to a first terminal with a supply voltage Ubat, the second terminal of the consumer 100 is connected to the first terminal of a switching means 110 in connection.
  • the second terminal of the switching means 110 is in communication with the first terminal of a current measuring means 120.
  • the second terminal of the current measuring means is in contact with ground.
  • the terminals of the consumer 100 and the terminals of the current measuring means 120 act upon a control unit 130 with signals, which in turn supply the switching means 110 with a drive signal A.
  • the load 100, the switching means 110, and the current measuring means 120 are connected in series in this order.
  • This order is chosen only as an example.
  • the three elements can also be arranged in a different order.
  • the switching means can also be arranged between the supply voltage and the load.
  • the current measuring means 120 can be arranged between the switching means 110 and the load 100 or between the load 100 and the supply voltage. Furthermore, it is possible that further switching means, in particular a between the load 100 and the supply voltage, are provided.
  • the switching means 110 is preferably realized as a transistor, in particular as a field-effect transistor.
  • the current measuring means 120 is preferably designed as an ohmic resistor.
  • In the consumer 100 is preferably the coil of a solenoid valve that is used for the metering of fuel.
  • FIG. 2 a shows a metering or an injection process. At time t1, the control of the consumer 100 begins.
  • the current I rises steeply.
  • a first value S1 is reached. To this Time opens the switching means. If the current drops by a certain value, the switching means 110 closes and the current rises again to the value S1.
  • the value S1 is also referred to as pull-in current.
  • the period between the time t1 and the time t2 is referred to as free current run-up. At this the regulation follows the attraction current.
  • a time window within which the switching means 110 is constantly in its closed state begins. This has the consequence that the current increases.
  • the movable element reaches its new end position due to the magnetic force. This results in a change in the inductance of the consumer. This causes a change in current increase.
  • the time window ends.
  • a second value S2 for the current is also called a holding current.
  • the control of the consumer ends at time t5, in which the switching means 110 is opened and the current drops to 0 until the time t6.
  • the current profile is shown only schematically and can take other courses in other types of solenoid valves or other driving method.
  • the behavior during the achievement of the new end position at time tBIP can be different. It is essential that at the switching time tBIP the current waveform has a kink and / or a discontinuity. Usually, this kink is detected by a current evaluation.
  • the switching means 110 is constantly closed. With a small ohmic resistance of the consumer 100, the current therefore increases very strongly in this period. This may cause a maximum current value to be exceeded and shut down the final stage, i. the switching means 110 is permanently opened.
  • the times t3 and t4 define a time window within which the switching time is detected. It is provided that within the time window, the switching means 110 is in its closed state. By evaluating the current profile within the time window, the switching time tBIP is detected. During the time window, which is defined by the times t3 and t4, the load 100 is supplied with the supply voltage Ubat and the time profile of the current is evaluated to determine the switching time. Due to the fact that the load is applied to the load in the time window, the control in the time window is simplified substantially, a voltage control is not required.
  • the limits for the time window t3 and t4 are preferably predefined on the basis of the switching time tBIP of the preceding drive and the width B of the time window.
  • the width B of the time window is, as described in Figure 3, given.
  • the time window i. the time interval between the times t3 and t4
  • the current increase during the time window limited This is done in particular at the start of the internal combustion engine.
  • the time profile of the duration of the time window is plotted with a solid line.
  • the maximum value IB of the current I which is detected shortly before the time t4, is plotted with a dashed line.
  • the threshold SW is plotted with a double line. The conditions in normal undisturbed operation are shown.
  • a minimum value BMIN is determined for the duration of the time window, i. specified in the distance between t3 and t4.
  • the maximum value IB of the current is clearly below the threshold value SW. This has the consequence that in the next injection, a larger value is given for the time window. This means that the duration B of the time window increases over the time several stages until a maximum value BMAX is reached.
  • the value BMIN is selected so that, even under unfavorable conditions, the maximum current IB is not greater than the threshold value SW.
  • the maximum value IB of the current also increases.
  • the maximum value does not reach the threshold SW.
  • Threshold SW is chosen to be slightly less than the maximum current value at which the current monitor responds.
  • the threshold value SW is not constant, but depends on the battery voltage Ubat applied to the load is, is given. As can be seen in FIG. 2b, this value rises slowly during the starting process.
  • the value B for the time window is set to the minimum value BMIN.
  • the subsequent query 320 checks whether the maximum value of the current IB is greater than the threshold value SW. If this is not the case, i. the maximum value IB of the current is smaller than the threshold value SW, then in step 330 the time window B is increased by the value X.
  • the maximum value IB of the current corresponds to the current value which is present at the time t4. If this can not be detected with difficulty or only with difficulty, a current value immediately prior to time t4 can be used as maximum value IB.
  • the maximum value IB of the current corresponds to the largest current value measured in the time window.
  • the maximum value IB of the current I is preferably detected immediately before the end of the time window (t4).
  • the subsequent query 340 checks whether the width B of the time window is greater than the maximum value BMAX. If so, the program ends in step 350.
  • the query 320 is repeated.
  • the program steps 320, 330 and 340 are run through several times until the width B of the time window has reached the maximum value BMAX. If this is the case, the procedure ends.
  • the width B of the window is reduced by the value Y in step 360.
  • the subsequent query 370 checks if the width B is less than or equal to the minimum value BMIN. If this is not the case, the query 320 is performed again. If this is the case, the width B is set to the minimum value BMIN in step 380, and the query 320 is performed again.
  • the width of the window B is reduced by the value Y until the maximum value IB of the current is smaller than the threshold value. It is preferably provided that the lower value BMIN is not undershot.
  • the time duration of the time window is increased if the current is smaller than the threshold value.
  • the time duration of the time window is increased until a maximum value (BMAX) for the time duration is reached.
  • the time duration of the time window is reduced if the current is greater than the threshold value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electromagnets (AREA)
EP99114827A 1998-11-25 1999-07-29 Verfahren zur Ansteuerung eines elektromagnetischen Verbrauchers Expired - Lifetime EP1005051B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19854305 1998-11-25
DE19854305A DE19854305A1 (de) 1998-11-25 1998-11-25 Verfahren und Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers

Publications (3)

Publication Number Publication Date
EP1005051A2 EP1005051A2 (de) 2000-05-31
EP1005051A3 EP1005051A3 (de) 2002-03-20
EP1005051B1 true EP1005051B1 (de) 2007-03-07

Family

ID=7888919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114827A Expired - Lifetime EP1005051B1 (de) 1998-11-25 1999-07-29 Verfahren zur Ansteuerung eines elektromagnetischen Verbrauchers

Country Status (5)

Country Link
US (1) US20010048087A1 (ja)
EP (1) EP1005051B1 (ja)
JP (1) JP2000164425A (ja)
DE (2) DE19854305A1 (ja)
ES (1) ES2281153T3 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011004309A1 (de) 2011-02-17 2012-08-23 Robert Bosch Gmbh Verfahren und Steuergerät zur Bestimmung eines Schaltzeitpunkts eines Magnetventils
CN109058574A (zh) * 2018-08-30 2018-12-21 宁波奕力电磁技术有限公司 具有位置状态监测的低功耗电磁阀的控制方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005033151A1 (de) * 2005-07-13 2007-01-18 Robert Bosch Gmbh Vorrichtung zur Ansteuerung einer elektromagnetischen Aktuatorik und Verfahren zum Testen einer ersten Induktivität einer elektromagnetischen Aktuatorik
DE102006044080B4 (de) 2006-09-20 2023-10-12 Robert Bosch Gmbh Verfahren zum Betreiben eines Reagenzmittel-Dosierventils und Vorrichtung zur Durchführung des Verfahrens
JP5233967B2 (ja) * 2009-11-20 2013-07-10 オムロンヘルスケア株式会社 血圧測定装置
CN101806255B (zh) * 2010-03-19 2013-01-02 清华大学 一种柴油机电磁阀驱动方法及其驱动系统
DE102011005672B4 (de) * 2011-03-17 2019-07-11 Continental Automotive Gmbh Verfahren, Vorrichtung und Computerprogramm zur elektrischen Ansteuerung eines Aktuators zur Bestimmung des Zeitpunkts eines Ankeranschlags

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8703213A1 (es) * 1985-04-25 1987-02-16 Kloeckner Wolfgang Dr Procedimiento para el accionamiento de una maquina motriz de combustion interna
DE4420282A1 (de) * 1994-06-10 1995-12-14 Bosch Gmbh Robert Verfahren und Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011004309A1 (de) 2011-02-17 2012-08-23 Robert Bosch Gmbh Verfahren und Steuergerät zur Bestimmung eines Schaltzeitpunkts eines Magnetventils
CN109058574A (zh) * 2018-08-30 2018-12-21 宁波奕力电磁技术有限公司 具有位置状态监测的低功耗电磁阀的控制方法

Also Published As

Publication number Publication date
EP1005051A2 (de) 2000-05-31
EP1005051A3 (de) 2002-03-20
DE19854305A1 (de) 2000-05-31
ES2281153T3 (es) 2007-09-16
DE59914240D1 (de) 2007-04-19
US20010048087A1 (en) 2001-12-06
JP2000164425A (ja) 2000-06-16

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