EP0765438B1 - Verfahren und vorrichtung zur steuerung eines elektromagnetischen verbrauchers - Google Patents
Verfahren und vorrichtung zur steuerung eines elektromagnetischen verbrauchers Download PDFInfo
- Publication number
- EP0765438B1 EP0765438B1 EP96909039A EP96909039A EP0765438B1 EP 0765438 B1 EP0765438 B1 EP 0765438B1 EP 96909039 A EP96909039 A EP 96909039A EP 96909039 A EP96909039 A EP 96909039A EP 0765438 B1 EP0765438 B1 EP 0765438B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- time
- current
- switching
- signal
- value
- 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
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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
-
- 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
- F02D2041/2017—Output circuits, e.g. for controlling currents in command coils using means for creating a boost current or using reference switching
-
- 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
- F02D2041/2031—Control of the current by means of delays or monostable multivibrators
-
- 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
Definitions
- the invention relates to a method and a device to control an electromagnetic consumer.
- Out DE-O 44 15 361 is a method and an apparatus known for controlling an electromagnetic consumer.
- Such electromagnetic consumers serve in particular for controlling the fuel metering in internal combustion engines.
- a solenoid valve sets the injection duration firmly.
- solenoid valves In solenoid valves, it usually passes between the Control time and the response of the solenoid valve one certain period of time. This period is usually called Switching time of the valve. This switching time depends depending on various parameters, such as the coil temperature and the current flowing through the coil. A variable switching time of the solenoid valve in turn has one variable injection duration and thus a changing injected Amount of fuel.
- No. 4,448,171 describes a method and an apparatus to control an internal combustion engine, in which the Valve closing time when controlling the Fuel injectors is taken into account.
- the invention has for its object in a method and a device for controlling the injected Amount of fuel to increase accuracy. This task is characterized by that in the independent claims Features resolved.
- FIG. 1 shows 2 shows a block diagram of the device according to the invention
- FIG. 2 a detailed block diagram of an embodiment and Figures 3 and 4 different plotted over time Signals.
- the invention is described below using the example of a device to control the amount of fuel to be injected described in an internal combustion engine. But it is not limited to this application. It can always be used be when the drive duration of an electromagnetic Is to be controlled by the consumer. This is particularly so then the case when the drive duration is a quantity, such as the volume flow flowing through the solenoid valve of a medium.
- a solenoid valve 100 denotes a solenoid valve.
- a first connection the coil of the solenoid valve 100 is at a supply voltage Ubat in connection.
- a second connection of the coil of the solenoid valve is via a switching means 110 and Current measuring means 120 connected to ground.
- the switching device is preferably implemented as a transistor. With the current measuring device it is preferably an ohmic Resistance, where the voltage drop across the ohmic resistor is evaluated for current measurement.
- a switching signal A is applied to the switching means 110. As long as the control signal A assumes a high level, the switching means 110 closes and thus releases the current flow through the consumer.
- the control signal A is provided by an OR gate 130.
- the OR gate 130 combines the output signal B of a control unit 140 and the output signal t V of a time extension 150.
- the output B of the control unit 140 and the output signal of a current determination 160 are fed to the time extension 150.
- the current determination 160 evaluates the voltage drop across the resistor 120.
- the control unit 140 calculates on the basis of signals not shown Control signal B to act on the switching means 110. If the signal B assumes a high level, the signal assumes A also indicates a high level, which gives switching means 110 the flow of current through the consumer 100 freely. After the Current flows through the solenoid valve 100, gives the solenoid valve the fuel metering in the internal combustion engine freely.
- the signal B drops to its low level and lies there is no signal from the time extension 150, so that happens Signal A also drops to the low level, resulting in a Opening the switching means 110 and an interruption of the Current flow leads. As a result, the solenoid valve 100 closes again and the fuel metering ends.
- the switch-off behavior of the solenoid valve 100 becomes decisive determined by the magnetic force at the time of switching off. Different sizes have an influence on this magnetic force. This is the voltage, tolerances of the inductance, the coil resistance and temperature influences.
- the Switching time essentially depends on the current value I1 when switching off, i.e. when signal A drops low level. Large current values result in longer ones Switching times than with small current values.
- the current is usually not a constant variable.
- the current depends on the resistance of the coil and therefore on the Temperature of the coil.
- Current regulation can also be provided be where the current is between two current values sways back and forth.
- the current increases with inductors after switching on according to an exponential function. It it can happen that the time at which the valve is turned off at a time when the Electricity has not yet reached its final value. In these cases the switching time deviates from its specified value.
- the current value I1 is recorded at the time of the switch-off time T1 specified by the control unit, which corresponds to the activation end.
- the time extension 150 corrects the actual stop time T2 such that a time is set as the effective activation duration of the solenoid valve, which time is obtained when the current end value I max is reached when it is switched off.
- a correction time ⁇ t is determined as a function of the current value I1 at the time of switching off.
- the time extension 150 emits a signal t v with a high level. The result of this is that the output signal A of the OR operation 130 remains at a high level for this period of time .DELTA.t and the actuation period of the solenoid valve is thus extended by this time .DELTA.t.
- Process for measuring the flow through the consumer Electricity can be used.
- the use is also a so-called Sensefet possible. This is what it is about is a field effect transistor that acts as an output variable a current proportional to the current flowing through the consumer Provides partial flow.
- FIG. 2 shows a possible embodiment of the time extension 150 in more detail. Elements already described in FIG. 1 are identified by corresponding reference symbols.
- the voltage present at the current measuring resistor 120 reaches an operational amplifier 210 via a switching means 200.
- the switching means 200 is switched depending on the signal B from the control unit.
- a resistor 220 and a capacitor 230 are connected to ground between the switching means 200 and the operational amplifier 210.
- the second input of operational amplifier 210 is connected to the center tap of a voltage divider consisting of resistors 240 and 245.
- the voltage divider consisting of resistors 240 and 245 is connected between ground and a voltage source VCC.
- the output of operational amplifier 210 is fed back to its second input via a resistor 250.
- the signal t V is present at the output of the operational amplifier and is led to the OR gate 130.
- the time extension 150 comprises a map in which the relationship between the instantaneous value I 1 of the current at the time t 1 of the drop in the signal B and the time period ⁇ t by which the activation is extended is stored. Furthermore, this variable can be calculated on the basis of the current value I 1 according to a predetermined function f (I 1 ).
- the characteristic diagram or the function f (I 1 ) are chosen such that a long time period ⁇ t results for small current values I 1 and a short time period ⁇ t results for large current values I 1 .
- the switching time TS of the valve depends on the current I 1 that flows at the time of switching off. This relationship can be determined by theoretical considerations or by measurements.
- Each current value I 1 can be assigned to a correction value At, so that in good approximation, the switching time is independent of the current value I 1, and thus fluctuations of the supply voltage, but depends only on the driving time.
- FIG. 3 shows the conditions that exist when the switch-off, that is to say the fall of signal B to a low signal level, takes place when the current through the consumer has reached its end value I max .
- the drive signal B and the drive signal A are plotted in FIG. 3a.
- FIG. 3b shows the current I flowing through the valve and the state of the solenoid valve in FIG. 3c.
- control signal B is at a high level, the current I flowing through the solenoid valve assumes its maximum value I max .
- the solenoid valve is in its open position.
- control unit 140 withdraws control signal B. This causes the current I to drop to 0.
- the solenoid valve remains in its open position for another time. Only after the delay time at time t off has elapsed does the solenoid valve assume its new position and close.
- the delay time between the time t1 and the time t off is referred to as the switching time TS.
- FIG. 4 shows the situation in the event that the switch-off takes place at a time t1 at which the current value I1 has not yet reached the maximum value I max at the time t 1 . If the switch-off takes place at the same time, the switching time is significantly shorter and the metering is correspondingly shortened, which results in a lower fuel quantity.
- FIG. 4a the signal B from the control unit 140 is again plotted, in FIG. 4b the signal B with which the switching means 110 is applied, in FIG. 4c the current I and in FIG. 4d the state of the solenoid valve is plotted.
- signal A and signal B assume their high level.
- the solenoid valve is in its open state.
- control unit 140 takes signal B back from its high to its low signal level.
- the instantaneous current value I1 at time t 1 is less than the current value I max .
- the switching time would be shorter than in the shutdown process shown in FIG. 3.
- the time extension 150 In order to correct the activation duration accordingly, the time extension 150 generates a signal t v which is present for the duration ⁇ t. This in turn has the effect that the output signal A, which is applied to the switching means 110, is present until the time t 2 . This has the effect that the current continues to rise and does not drop until time t2.
- the solenoid valve only blocks the flow of fuel from time t off .
- the signal t v or the delay time ⁇ t is specified so that the valve closes after the fall of the signal B after a fixed switching time TS.
- the switching time TS is preferably determined at a specific current value I max and taken into account by the control unit when determining the signal B. In one embodiment of the invention it can also be provided that the current value I max is an arbitrary current value.
- control unit 140 outputs a signal B, which drops to its low level by switching time TS before time t off .
- the time extension 150 corrects the control signal A by a time period ⁇ t, which depends on the current value I1 at the time of switching off.
- the time period ⁇ t is preferably predetermined as a function of the difference between the current value I1 when signal B drops and the current value I max at which the expected switching time TS was determined. If the two current values I1 and I max are equal, the time period ⁇ t becomes 0. If the current value I1 is less than the current value I max , the control is extended, the value ⁇ t by which the control is extended in the event of large deviations both values is larger than for small deviations.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Magnetically Actuated Valves (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (6)
- Verfahren zur Ansteuerung eines elektromagnetischen Verbrauchers, insbesondere eines Magnetventils zur Beeinflussung der in eine Brennkraftmaschine einzuspritzenden Kraftstoffmenge, wobei die Dauer der Ansteuerung des Magnetventils um eine Verzugszeit (Δt) korrigierbar ist, dadurch gekennzeichnet, dass die Korrektur abhängig von dem Momentanwert (I1) des Stroms zu einem Abschaltzeitpunkt (T1) einer Steuereinheit, derart einstellbar ist, dass der elektromagnetische Verbraucher nach diesem Abschaltzeitpunkt (T1) nach Ablauf einer festen Schaltzeit schließt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Verzugszeit (Δt) abhängig von der Differenz zwischen dem Momentanwert des Stroms (I1) und einem Stromwert (Imax) vorgebbar ist.
- Verfahren nach Anspruch 1 oder 1, dadurch gekennzeichnet, dass die Verzugszeit abhängig von dem Momentanwert des Stroms (I1) in einem Kennfeld abgelegt ist.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass bei einem kleinen Momentanwert des Stroms (I1) ein großer Wert für die Verzugszeit (Δt) vorgebbar ist.
- Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass bei einem großen Momentanwert des Stroms (I1) ein kleiner Wert für die Verzugszeit (Δt) vorgebbar ist.
- Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers, insbesondere eines Magnetventils, das die in eine Brennkraftmaschine einzuspritzende Kraftstoffmenge beeinflußt, mit Mitteln, die die Dauer der Ansteuerung des Magnetventils um eine Verzugszeit (Δt) korrigieren, dadurch gekennzeichnet, dass die Mittel die Korrektur abhängig von dem Momentanwert (I1) des Stroms zu einem Abschaltzeitpunkt (T1) einer Steuereinheit, derart einstellen, dass der elektromagnetische Verbraucher nach diesem Abschaltzeitpunkt (T1) nach Ablauf einer festen Schaltzeit schließt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19513878A DE19513878A1 (de) | 1995-04-12 | 1995-04-12 | Verfahren und Vorrichtung zur Steuerung eines elektromagnetischen Verbrauchers |
DE19513878 | 1995-04-12 | ||
PCT/DE1996/000642 WO1996032580A1 (de) | 1995-04-12 | 1996-04-12 | Verfahren und vorrichtung zur steuerung eines elektromagnetischen verbrauchers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0765438A1 EP0765438A1 (de) | 1997-04-02 |
EP0765438B1 true EP0765438B1 (de) | 2001-09-26 |
Family
ID=7759554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96909039A Expired - Lifetime EP0765438B1 (de) | 1995-04-12 | 1996-04-12 | Verfahren und vorrichtung zur steuerung eines elektromagnetischen verbrauchers |
Country Status (7)
Country | Link |
---|---|
US (1) | US5878722A (de) |
EP (1) | EP0765438B1 (de) |
JP (1) | JP4079993B2 (de) |
KR (1) | KR100413141B1 (de) |
CN (1) | CN1071406C (de) |
DE (2) | DE19513878A1 (de) |
WO (1) | WO1996032580A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3818607B2 (ja) * | 1997-01-27 | 2006-09-06 | 株式会社小松製作所 | カム駆動式の電子制御ユニットインジェクタの制御装置及びその制御方法 |
JP4119116B2 (ja) * | 2001-08-02 | 2008-07-16 | 株式会社ミクニ | 燃料噴射方法 |
KR100857638B1 (ko) | 2001-08-16 | 2008-09-08 | 로베르트 보쉬 게엠베하 | 전자기 소비기를 제어하기 위한 방법 및 장치 |
JP4067384B2 (ja) * | 2002-10-30 | 2008-03-26 | 株式会社ミクニ | 燃料噴射方法 |
KR20050097519A (ko) * | 2003-02-03 | 2005-10-07 | 가부시키가이샤 미쿠니 | 연료분사제어방법 및 제어장치 |
DE102005056210A1 (de) * | 2005-11-25 | 2007-05-31 | Robert Bosch Gmbh | Verfahren zum sicheren Schließen eines Magnetventils |
DE102006059625A1 (de) | 2006-12-14 | 2008-06-19 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Steuerung eines elektromagnetischen Ventils |
DE102009027311A1 (de) * | 2009-06-30 | 2011-01-05 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
DE102010001261A1 (de) * | 2010-01-27 | 2011-07-28 | Robert Bosch GmbH, 70469 | Steuervorrichtung für einen elektromagnetischen Aktor und Verfahren zum Betreiben eines elektromagnetischen Aktors |
ES2543312T3 (es) | 2011-02-11 | 2015-08-18 | Batmark Limited | Componente para inhalador |
AT510837B1 (de) | 2011-07-27 | 2012-07-15 | Helmut Dr Buchberger | Inhalatorkomponente |
JP5754357B2 (ja) * | 2011-11-18 | 2015-07-29 | 株式会社デンソー | 内燃機関の燃料噴射制御装置 |
JP6156307B2 (ja) * | 2013-10-11 | 2017-07-05 | 株式会社デンソー | 内燃機関の燃料噴射制御装置 |
JP6260501B2 (ja) * | 2013-10-11 | 2018-01-17 | 株式会社デンソー | 内燃機関の燃料噴射制御装置 |
DE102014208837A1 (de) * | 2014-05-12 | 2015-11-12 | Robert Bosch Gmbh | Verfahren zur Regelung eines Öffnungsverhaltens von Einspritzventilen |
GB2533135B (en) | 2014-12-11 | 2020-11-11 | Nicoventures Holdings Ltd | Aerosol provision systems |
CA3103090C (en) | 2016-04-27 | 2023-03-28 | Nicoventures Trading Limited | Electronic aerosol provision system and vaporizer therefor |
CN117222801A (zh) * | 2021-05-11 | 2023-12-12 | 日立安斯泰莫株式会社 | 燃料喷射控制装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4448171A (en) * | 1981-06-08 | 1984-05-15 | Nippondenso Co., Ltd. | Method and apparatus for optimum control of internal combustion engines |
EP0306839A1 (de) * | 1987-09-07 | 1989-03-15 | Sikora, Gernot, Dipl.-Ing. | Verfahren und Einrichtung zum Ansteuern von Elektromagneten, insbesondere in Einspritzventilen |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2521086B2 (ja) * | 1987-04-06 | 1996-07-31 | 株式会社ゼクセル | 燃料噴射ポンプの制御装置 |
DE3805033A1 (de) * | 1988-02-18 | 1989-08-31 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
IT1223958B (it) * | 1988-11-30 | 1990-09-29 | Marelli Autronica | Dispositivo per il controllo ad anello chiuso della velocita di rotazione al minimo di un motore a combustione interna |
DE4020094C2 (de) * | 1990-06-23 | 1998-01-29 | Bosch Gmbh Robert | Verfahren und Einrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers |
DE4120461C2 (de) * | 1991-06-21 | 2000-09-14 | Bosch Gmbh Robert | Verfahren und Einrichtung zur Steuerung eines magnetventilgesteuerten Kraftstoffzumeßsystems |
DE4140043A1 (de) * | 1991-12-05 | 1993-06-09 | Robert Bosch Gmbh, 7000 Stuttgart, De | System zur ansteuerung eines induktiven verbrauchers |
JPH05248300A (ja) * | 1992-03-04 | 1993-09-24 | Zexel Corp | 燃料噴射装置 |
DE69320826T2 (de) * | 1992-03-26 | 1999-01-21 | Zexel Corp., Tokio/Tokyo | Kraftstoff-Einspritzvorrichtung |
US5325837A (en) * | 1992-11-19 | 1994-07-05 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
DE4305488A1 (de) * | 1993-02-23 | 1994-08-25 | Bosch Gmbh Robert | Steuerschaltung für ein Magnetventil |
EP0644323B1 (de) * | 1993-09-17 | 1997-12-10 | Siemens Aktiengesellschaft | Vorrichtung zur Ermittlung eines Betriebszustandes einer Einspritzpumpe |
DE4415361B4 (de) * | 1994-05-02 | 2005-05-04 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung eines elektromagnetischen Verbrauchers |
US5646600A (en) * | 1995-01-12 | 1997-07-08 | General Electric Company | Instrument for detecting potential future failures of valves in critical control systems |
-
1995
- 1995-04-12 DE DE19513878A patent/DE19513878A1/de not_active Withdrawn
-
1996
- 1996-04-12 WO PCT/DE1996/000642 patent/WO1996032580A1/de active IP Right Grant
- 1996-04-12 US US08/765,007 patent/US5878722A/en not_active Expired - Fee Related
- 1996-04-12 EP EP96909039A patent/EP0765438B1/de not_active Expired - Lifetime
- 1996-04-12 JP JP53064596A patent/JP4079993B2/ja not_active Expired - Fee Related
- 1996-04-12 CN CN96190323A patent/CN1071406C/zh not_active Expired - Fee Related
- 1996-04-12 KR KR1019960707010A patent/KR100413141B1/ko not_active IP Right Cessation
- 1996-04-12 DE DE59607756T patent/DE59607756D1/de not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4448171A (en) * | 1981-06-08 | 1984-05-15 | Nippondenso Co., Ltd. | Method and apparatus for optimum control of internal combustion engines |
EP0306839A1 (de) * | 1987-09-07 | 1989-03-15 | Sikora, Gernot, Dipl.-Ing. | Verfahren und Einrichtung zum Ansteuern von Elektromagneten, insbesondere in Einspritzventilen |
Also Published As
Publication number | Publication date |
---|---|
KR100413141B1 (ko) | 2004-04-30 |
EP0765438A1 (de) | 1997-04-02 |
DE19513878A1 (de) | 1996-10-17 |
WO1996032580A1 (de) | 1996-10-17 |
JP4079993B2 (ja) | 2008-04-23 |
US5878722A (en) | 1999-03-09 |
DE59607756D1 (de) | 2001-10-31 |
CN1150469A (zh) | 1997-05-21 |
CN1071406C (zh) | 2001-09-19 |
JPH10501865A (ja) | 1998-02-17 |
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