EP1216356B1 - Procede et circuit de temporisation permettant de produire un signal de commutation ou de commande - Google Patents

Procede et circuit de temporisation permettant de produire un signal de commutation ou de commande Download PDF

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Publication number
EP1216356B1
EP1216356B1 EP00967808A EP00967808A EP1216356B1 EP 1216356 B1 EP1216356 B1 EP 1216356B1 EP 00967808 A EP00967808 A EP 00967808A EP 00967808 A EP00967808 A EP 00967808A EP 1216356 B1 EP1216356 B1 EP 1216356B1
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EP
European Patent Office
Prior art keywords
current
threshold value
inductor
voltage
ignition coil
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
EP00967808A
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German (de)
English (en)
Other versions
EP1216356A1 (fr
Inventor
Paul Nance
Stefan-Michael Leipold
Brigitte Hiebl-Leipold
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.)
Infineon Technologies AG
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Infineon Technologies AG
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Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/045—Layout of circuits for control of the dwell or anti dwell time
    • 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

Definitions

  • the invention relates to a method and a time circuit to generate a switching or control signal after a predeterminable period of time.
  • Timers for switching off a consumer are common as so-called RC circuits with an RC element, that serves as a timer.
  • the ignition coil is switched off in a way that there is no spark at the spark plug when the Control works incorrectly.
  • Switching off the ignition coil can be done, for example, when a maximum temperature in the electronic switch that exceeds the ignition coil switches on and off.
  • This predeterminable time period is chosen to be greater than the switch-on time of the ignition coil during trouble-free operation.
  • the switch-on and are in an electronic ignition system Switch-off times in a range from approximately 10 ms to 50 ms.
  • a timer is suitable for switching off the ignition coil.
  • an RC circuit can be used for this which, however, has the disadvantage that the capacitor cannot be integrated on a chip, but as external component is to be provided.
  • Another, integrable The solution is to use an oscillator and several binary divider stages in front. This solution has the advantage of Integrability of all components, however, requires a high level Circuitry.
  • the method according to the invention achieves this object according to claim 1 in that at the beginning of the time measurement a voltage is placed on an inductor and that a current threshold detector emits the switching or control signal, when the current through the inductor has a given Threshold exceeded.
  • an inductance is as Timer provided.
  • the increase in current through the inductance is detected by a current threshold detector, that when an adjustable and predeterminable value is exceeded Threshold value emits a switching or control signal that leads to Example can switch a consumer on or off.
  • Threshold value emits a switching or control signal that leads to Example can switch a consumer on or off.
  • the method according to the invention can advantageously be used in an electronic ignition system of an internal combustion engine use because the existing ignition coil as a timing element can serve.
  • a first embodiment of the method according to the invention provides for the current through the inductor by means of a Measuring resistance to detect at its connections Voltage threshold detector is connected.
  • a second embodiment of the method according to the invention provides that the voltage drop and the current rise measured on the inductance and in a logic circuit arrangement logically linked with each other.
  • the logical one Circuit arrangement generates the switching or control signal.
  • a third embodiment of the method according to the invention is used in an electronic ignition system of an internal combustion engine used.
  • the current threshold detector already mentioned or voltage threshold detector or the logical Circuitry control the electronic switch of the electronic ignition system that turns the ignition coil on and off off. After the specified period of time, the current threshold detector gives the voltage threshold detector or the logic circuit arrangement a switching signal for switching off the ignition coil.
  • a fourth embodiment of the method according to the invention looks for when used in an electronic ignition system an internal combustion engine before that in the event of a short circuit the ignition coil, the current through the ignition coil is switched off becomes.
  • FIG. 1 It now becomes the first embodiment shown in FIG. 1 described a timer circuit according to the invention and explained.
  • a circuit there is a voltage source U, a controllable one Switch S, an inductor L and a current threshold detector ID with a control output.
  • controllable switch S By closing the controllable switch S, for example can be operated by a control circuit the timer is switched on. If the current I through the Inductance L a predeterminable and adjustable threshold exceeds the current threshold detector ID a switching or control signal from its output, for example for controlling or switching a consumer on and off can serve.
  • FIG. 2 It now becomes the second embodiment shown in FIG. 2 a timing circuit according to the invention described and explained.
  • a timer according to the invention is the structure of the Current threshold detector ID shown.
  • the voltage source U the controllable switch S, the inductance L and a measuring resistor R, at its terminals Voltage threshold detector UD1 is connected.
  • the measuring resistor R and the voltage threshold detector UD1 form the current threshold detector ID.
  • the second embodiment can also be in an electronic Insert ignition system.
  • the control output of the voltage threshold detector ÜD1 is connected to the control input of the controllable switch S connected to the ignition coil L and turns off.
  • FIG. 3 It is now shown in FIG. 3 and in an electronic Ignition system built third embodiment a time circuit according to the invention described and explained.
  • the third connection of the primary winding PW the ignition coil L is the one connection of the primary winding PW the ignition coil L with one pole of the voltage source U - the Vehicle battery - and the first input of a voltage threshold detector UD2 connected.
  • the second connection of the Primary winding PW of the ignition coil L is at the second input of the voltage threshold detector UD2 and to the collector a field effect transistor T connected to the controllable S represents switch.
  • the first emitter of the field effect transistor T is via the measuring resistor R with its gate electrode, with the first output A1 of a logic circuit LS, with the third input of the second voltage threshold detector UD2 and with the other pole of the voltage source U connected.
  • the one connection of the measuring resistor R is at the first input of a voltage threshold detector UD1 and the other connection of the measuring resistor R with the second input of the voltage threshold detector UD1, whose output is connected to the first input of the logic circuit LS is connected.
  • the output of the voltage threshold detector UD2 is the second input of the logic circuit LS connected, the second output A2 on the gate electrode of the field effect transistor T is connected is.
  • Parallel to the gate electrode and A Zener diode Z is connected to the emitter of the field effect transistor T.
  • a so-called is preferably used for the field effect transistor T. Insulated gate bipolar transistor used.
  • the current through the primary winding PW of the ignition coil L is cyclically switched on and off by means of the field effect transistor T, to at the secondary winding SW of the ignition coil L connected spark plugs at the right moment To generate sparks.
  • the current I rises through the primary coil PW of the ignition coil L. linear on. According to the invention, the linear increase of Current I for time measurement.
  • the field effect transistor T In the case of trouble-free operation, the field effect transistor T cyclically switched on and off so that the ignition coil is in the correct position The ignition voltage required for the spark plugs supplies. If now due to a fault at the time of ignition no ignition spark is generated, the current I increases through the primary winding PW of the ignition coil L continues linearly. To prevent the ignition coil from being destroyed by excessive current, the field effect transistor T of the logical Circuit LS so slowly from the conductive state to the not conductive state controlled that the differential quotient dI / dt of the one flowing through the primary winding PW of the ignition coil L. Current remains so small that that on the secondary winding SW of the ignition coil L no longer induced the ignition voltage is sufficient to generate a spark at the spark plugs. This prevents ignition sparks outside of the ignition times.
  • the voltage drop across the measuring resistor R which is proportional to the current I flowing through the primary winding PW of the ignition coil L, is detected by means of the voltage threshold detector UD1.
  • the voltage drop across the collector-emitter path of the field effect transistor T is detected by means of the voltage threshold detector UD2.
  • the threshold value set in the voltage threshold value detector UD1 is selected to be greater than the value of the voltage drop across the measuring resistor R at the time of ignition. In the case of trouble-free operation, the value set in the voltage threshold detector UD1 is therefore never reached.
  • the current I through the primary coil PW and thus the voltage drop across the measuring resistor R in the event of a fault rises above the threshold value set in the voltage threshold value detector UD1.
  • the voltage across the collector-emitter path of the field effect transistor T which is detected by means of the voltage threshold detector UD2, drops below the collector-emitter saturation voltage.
  • the collector-emitter voltage is present of the field effect transistor T significantly above the saturation voltage, which is from the voltage threshold detector UD2 is detected.
  • the voltage threshold detector UD2 At well above the saturation voltage lying collector-emitter voltage of the field effect transistor T gives the voltage threshold detector UD2 a control signal to the logic circuit LS, which then the Field effect transistor T immediately in the non-conductive state controls.
  • the Current through the primary winding PW of the ignition coil L immediately switched off be because in this case in the secondary winding SW of the ignition coil L no voltage is induced and therefore no spark can be generated.
  • an inductance as a timing element is neither an RC element nor an oscillator with subsequent ones Binary divider stages required.
  • the invention is therefore especially for an electronic ignition system suitable because an electronic ignition system has an inductance anyway -
  • the ignition coil - contains a double function exercises. It generates the ignition voltage and serves at the same time as a timer.
  • the invention is particularly good for circuit arrangements or systems suitable in which an inductance is provided, which is then also used as a timing element can be.
  • the invention is by no means limited to such circuits or systems with an existing inductance. It can be used to advantage anywhere where relatively long times have to be measured. If in the area of application does not already have an inductor is, and can be used as a timer, is an inductor to be provided as a timer.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Electronic Switches (AREA)

Abstract

La présente invention concerne un procédé permettant de produire un signal de commutation ou de commande après un intervalle de temps pouvant être prédéterminé, dans lequel une tension (U) est appliquée à une inductance (L) servant de temporisateur au début du chronométrage. Lorsque le courant (I) passant dans l'inductance (L) dépasse une valeur seuil pouvant être prédéterminée, un détecteur de valeur seuil de courant (ID) produit le signal de commutation ou de commande. Dans système d'allumage électronique destiné à des moteurs à combustion, la bobine d'allumage (L, PW, SW) ne sert pas seulement à produire la tension d'allumage, mais sert également de temporisateur pour un circuit de temporisation (UD1, UD2, LS), qui interrompt le courant (I) passant à travers l'enroulement primaire (PW) de la bobine d'allumage (L) après un temps pouvant être prédéterminé. L'interruption du courant (I) est réalisée au moyen d'un quotient différentiel dI/dt choisi de sorte que la tension d'allumage induite dans la bobine d'allumage (L) n'est plus suffisante pour produire une étincelle d'allumage au niveau des bougies d'allumage.

Claims (17)

  1. Procédé pour générer un signal de commutation de commande après une durée prédéterminée,
    caractérisé en ce qu'
    au début de la mesure du temps, on applique une tension (U) à une inductance (L), et un détecteur de seuil de courant (ID) donne le signal de commutation ou le signal de commande lorsque le courant (I) dans l'inductance (L) dépasse un seuil prédéterminé.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le courant (I) dans l'inductance (L) traverse une résistance de mesure (R) et la chute de tension aux bornes de la résistance de mesure (R) est mesurée par un détecteur de seuil de tension (UD1) qui sert de mesure de l'intensité (I) dans l'inductance (L).
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce qu'
    on mesure la chute de tension et l'augmentation de courant dans l'inductance (L) et on les combine dans un circuit logique (LS) par une combinaison logique, et le circuit logique (LS) génère le signal de commutation de commande.
  4. Procédé selon la revendication 1, 2 ou 3,
    caractérisé en ce que
    le détecteur de seuil d'intensité (ID), le détecteur de seuil de tension (UD1) ou le circuit logique (LS) commandent un commutateur électronique (T) qui coupe le courant (I) dans l'inductance (L).
  5. Procédé selon la revendication 4,
    caractérisé en ce qu'
    on mesure la montée de l'intensité dans l'inductance (L) et la chute de tension aux bornes du commutateur électronique (T) et on les combine de manière logique dans le circuit de commutation logique (LS), et
    le circuit de commutation logique (LS) émet le signal de commutation ou le signal de commande.
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    l'inductance (L) est la bobine d'allumage d'un système d'allumage d'un moteur à combustion.
  7. Procédé selon la revendication 6,
    caractérisé en ce qu'
    en cas de court-circuit au niveau de la bobine d'allumage (L), on coupe le courant dans la bobine d'allumage (L).
  8. Procédé selon les revendications 6 ou 7,
    caractérisé en ce qu'
    on coupe le courant (I) dans la bobine d'allumage (L) selon un quotient différentiel (dI/dt) choisi suffisamment faible pour ne pas générer d'étincelle d'allumage dans la bougie reliée à la bobine d'allumage (L).
  9. Circuit de temps pour générer un signal de commutation de commande après une durée prédéterminée,
    caractérisé en ce que
    le circuit comprend une source de tension (U), un commutateur commun (S), une inductance (L) ainsi qu'un détecteur de seuil de courant (ID) avec une sortie de commande.
  10. Circuit selon la revendication 9,
    caractérisé en ce que
    le détecteur de seuil de courant (ID) est formé d'un premier détecteur de seuil de tension (UD1) avec une sortie de commande et une résistance de mesure (R) branchée en parallèle.
  11. Circuit selon la revendication 9 ou 10,
    caractérisé en ce que
    l'inductance (L) est l'enroulement primaire (PW) d'une bobine d'allumage d'un système d'allumage électronique d'un moteur à combustion et la sortie de commande du détecteur de seuil d'intensité (ID) est reliée à l'entrée de commande du commutateur commandé (S).
  12. Circuit selon la revendication 10,
    caractérisé en ce que
    l'inductance (L) est l'enroulement (PW) d'une bobine d'allumage d'un système d'allumage électronique d'un moteur à combustion et la sortie de commande du détecteur de seuil de tension (UD1) est reliée à l'entrée de commande du commutateur commandé (S).
  13. Circuit selon l'une quelconque des revendications 9 à 12,
    caractérisé en ce que
    le commutateur commandé (S) est un transistor à effet de champ (T).
  14. Circuit selon la revendication 13,
    caractérisé en ce que
    le transistor à effet de champ (T) est un transistor bipolaire à porte isolée (IGBT).
  15. Circuit selon l'une quelconque des revendications 11, 12, 13, 14,
    caractérisé en ce qu'
    un branchement de l'embranchement primaire (PW) de la bobine d'allumage (L) est relié à un pôle et à la première entrée d'un second détecteur de seuil de tension (UD2),
    le second branchement de l'enroulement primaire (PW) est relié à la seconde entrée du second détecteur à seuil de tension (UD2) et au collecteur d'un transistor à effet de champ (T), dont le premier émetteur est relié par la résistance de mesure (R) à l'électrode de porte du transistor à effet de champ (T), à la première sortie (A1) d'un circuit logique (LS), à la troisième entrée du second détecteur de seuil de tension (UD2) et à l'autre pôle de la source de tension (U), et un branchement de la résistance de mesure (R) est reliée à la première entrée du premier détecteur de seuil de tension (UD1) dont la sortie est reliée à la première entrée du circuit de commutation logique (LS), et
    la sortie du second détecteur de seuil de tension (UD2) est reliée à la seconde entrée du circuit de commutation logique (LS) dont la seconde sortie (A2) est reliée à l'électrode de porte du transistor à effet de champ (T).
  16. Circuit selon la revendication 15,
    caractérisé en ce qu'
    un second émetteur du transistor à effet de champ (T) est prévu en parallèle au premier émetteur et à la résistance de mesure (R).
  17. Circuit selon la revendication 15 ou 16,
    caractérisé par
    une diode Zener (Z) en parallèle à l'électrode de porte et à l'émetteur du transistor à effet de champ (T).
EP00967808A 1999-09-30 2000-09-27 Procede et circuit de temporisation permettant de produire un signal de commutation ou de commande Expired - Lifetime EP1216356B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19946994A DE19946994C2 (de) 1999-09-30 1999-09-30 Verfahren und Zeitschaltung zur Erzeugung eines Schalt- oder Steuersignales
DE19946994 1999-09-30
PCT/EP2000/009457 WO2001023756A1 (fr) 1999-09-30 2000-09-27 Procede et circuit de temporisation permettant de produire un signal de commutation ou de commande

Publications (2)

Publication Number Publication Date
EP1216356A1 EP1216356A1 (fr) 2002-06-26
EP1216356B1 true EP1216356B1 (fr) 2003-06-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967808A Expired - Lifetime EP1216356B1 (fr) 1999-09-30 2000-09-27 Procede et circuit de temporisation permettant de produire un signal de commutation ou de commande

Country Status (5)

Country Link
US (1) US6734676B2 (fr)
EP (1) EP1216356B1 (fr)
JP (1) JP2003510519A (fr)
DE (1) DE19946994C2 (fr)
WO (1) WO2001023756A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034865A1 (de) 2004-07-19 2006-02-16 Siemens Ag Sensor zur Messung der Position eines Stellgliedes

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003892A1 (de) * 1980-02-02 1981-08-13 Robert Bosch Gmbh, 7000 Stuttgart Druckabhaengige verstellung von betriebsparametern von brennkraftmaschinen
DE3321768A1 (de) * 1983-06-16 1984-12-20 Robert Bosch Gmbh, 7000 Stuttgart Zuendanlage fuer brennkraftmaschinen
US5548471A (en) * 1994-07-25 1996-08-20 Webster Heating And Specialty Products, Inc. Circuit and method for spark-igniting fuel
US5745352A (en) * 1994-10-27 1998-04-28 Sgs-Thomson Microelectronics S.R.L. DC-to-DC converter functioning in a pulse-skipping mode with low power consumption and PWM inhibit
JP3299409B2 (ja) * 1995-03-31 2002-07-08 三菱電機株式会社 内燃機関用点火装置
US6006156A (en) * 1997-12-11 1999-12-21 Cummins Engine Company, Inc. Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine
US6166927A (en) * 1999-07-23 2000-12-26 Ericsson Inc. Push-pull power converter circuit
US6505605B2 (en) * 2000-03-29 2003-01-14 Ngk Spark Plug Co., Ltd. Control system for an internal combustion engine and method carried out by the same

Also Published As

Publication number Publication date
WO2001023756A1 (fr) 2001-04-05
DE19946994A1 (de) 2001-04-05
US6734676B2 (en) 2004-05-11
US20020075014A1 (en) 2002-06-20
JP2003510519A (ja) 2003-03-18
EP1216356A1 (fr) 2002-06-26
DE19946994C2 (de) 2001-09-13

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