EP0559540A1 - Elektronische Zündungsvorrichtung mit Spule für Brennkraftmaschine mit gesteuerter Zündung - Google Patents

Elektronische Zündungsvorrichtung mit Spule für Brennkraftmaschine mit gesteuerter Zündung Download PDF

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Publication number
EP0559540A1
EP0559540A1 EP93400517A EP93400517A EP0559540A1 EP 0559540 A1 EP0559540 A1 EP 0559540A1 EP 93400517 A EP93400517 A EP 93400517A EP 93400517 A EP93400517 A EP 93400517A EP 0559540 A1 EP0559540 A1 EP 0559540A1
Authority
EP
European Patent Office
Prior art keywords
voltage
primary
ignition
spark plug
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.)
Withdrawn
Application number
EP93400517A
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English (en)
French (fr)
Inventor
Bernard Boucly
Jean-Pierre Nader
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.)
Marelli Autronica SA
Original Assignee
Marelli Autronica SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marelli Autronica SA filed Critical Marelli Autronica SA
Publication of EP0559540A1 publication Critical patent/EP0559540A1/de
Withdrawn legal-status Critical Current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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/10—Measuring dwell or antidwell time
    • 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
    • F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
    • 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
    • F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
    • F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/053—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits

Definitions

  • the subject of the present invention is an ignition device controlled by spark plugs, for an internal combustion engine, of the so-called “electronic” type, comprising a calculation and control unit, such as a microprocessor, controlling a cut-off switch placed in the primary charge circuit of a coil from a source, such as the battery of a vehicle equipped with the engine.
  • a calculation and control unit such as a microprocessor, controlling a cut-off switch placed in the primary charge circuit of a coil from a source, such as the battery of a vehicle equipped with the engine.
  • the start time of the charge can thus be optimally adjusted by the control unit.
  • the invention aims in particular to provide a device of the above type allowing the control unit to have information on the duration of the spark between the spark plug electrodes, without this requiring additional output to the control unit.
  • the invention proposes in particular a device which further comprises means for transposing the primary voltage to form the image of the secondary voltage and supply, on said output, a signal when the secondary voltage becomes less than a determined threshold indicating the end of the spark at the candle.
  • transposition means allows the control unit to detect an abnormal state (short circuit or open circuit), revealed by the maintenance of the arc voltage for a duration greater than or less than a range that the experience revealed as normal.
  • arc voltage for a period of between approximately 0.4 ms and 2 ms will indicate correct operation; an arc voltage for less than 0.4 ms will indicate a high probability of open circuit while an arc voltage of a duration greater than 2 ms will indicate a high probability of short circuit.
  • the transposition means can in particular use the fact that, when the current at the primary is canceled, the difference between the voltage V p at the terminals of the primary and the voltage of the source Vbat is equal to the voltage at the secondary V s , divided by the transformation ratio N.
  • a transposition circuit using this observation can in particular include, in series between the terminal of the primary not connected to the source and the ground, the emitter-collector junction of a transistor whose collector resistances and d emitters are proportioned so that the voltage across one of the resistors is representative of the difference between the voltage across the primary and the source voltage.
  • This arrangement makes it possible in particular, by comparing the voltage representative of the secondary voltage to several thresholds, to determine the characteristics of the arc, for example by taking into account that the ionization voltage (generally of the order of 10 KVolts) is significantly higher than the arc holding voltage, generally between 500 and 1000 Volts.
  • the signals indicating the successive passage to the various thresholds can still be transmitted on the same output.
  • precise information on the spark voltage can be provided to the calculation and control unit by digitizing the voltage representative of the secondary voltage.
  • the diagnostic means (means for detecting the passage of a load current above a threshold and means for transposition) may be common to all of the coils.
  • the measurement of the spark duration can be taken into account by the calculation and control unit to adjust the primary current at which the cut is made, this in order to guarantee for example a sufficient spark duration to avoid unburned.
  • the device is intended for the ignition of a combustion chamber of an internal combustion engine, equipped with at least one spark plug 10 placed in series with the secondary 12 of a coil. 14.
  • the primary 16 of the coil is connected to a power source (vehicle battery in general), of voltage Vbat.
  • the current I p which flows through the primary 16 is controlled by a power switch 18.
  • a resistor 20 is connected in series between the switch 18 and the ground so as to provide a voltage at its terminals V representative of the current I p .
  • the switch 18 is controlled on closing and opening by a calculation and control unit 22, generally comprising a microprocessor, fixing the instant T0 of closing of the switch and the instant T2 of opening.
  • This switch can be controlled by the unit 22 by means making it possible to avoid the appearance of a pre-spark, of the kind described in French patent application No. 92 02300.
  • the device of FIG. 1 comprises detection means providing a signal when the current I p of charge in the primary exceeds a determined value I1, equal for example to 4.5 Amperes when the current I2 to be cut to obtain a quality spark satisfactory is 6 Amps.
  • detection means include a comparator 24, one input of which receives the voltage V across the resistor 20 and the other of a reference voltage V r1 .
  • V d applied to the diagnostic input of the calculation and control unit 22 goes from the logic voltage V cc (+ 5 volts for example) to zero when I p exceeds the value I1.
  • the unit 22 can determine the time t2 necessary to arrive at the current I2 and, for the next ignition, determine T0 appropriately.
  • the means for transposing the device in FIG. 1 include, for example, from the junction between the primary 16 and the switch 18, the emitter-collector junction of a bipolar transistor 26, of PNP type, and the resistors of transmitter and collector 28 and 30, with respective values R e and R c .
  • a capacitor 30 of low value (100 nF for example) is advantageously placed in parallel with the resistor 30, to ensure filtering.
  • the voltage V c is an image of the spark voltage at the secondary, when the current I p is zero because the switch 18 is cut. This voltage V c can be compared to a reference voltage V r2 , in a comparator 34.
  • the reference voltage V r2 is chosen so that the passage of V c below V r2 indicates the end of the spark at the candle 10.
  • comparator 34 attacks the diagnostic input of the calculation and control unit 22. All of the comparators 24 and 34 then constitute the equivalent of an OR circuit, which passes in the low state at time T3 ( Figure 2). Indeed comparator 34 goes low at time T2, when the primary circuit is cut, and remains there until time T3.
  • comparators 34 can be connected in parallel, to supply successive signals, which this time can be impulse, on the diagnostic input of the unit 22, for increasingly low values of the voltage at the secondary, for example when the secondary voltage changes from the value necessary for ionization to the holding value.
  • an element 36 with unidirectional conduction is interposed between each coil and this assembly.
  • duration t1 gives an indication of the state of the ignition system, a short duration t1 (for example less than 1.5 ms for a source voltage Vbat of 13.5 volts), indicating a probability short circuit in primary).
  • FIG. 1 shows a constitution in which each switch 18a associated with a coil 14a is constituted by an IGBT transistor.
  • each coil 14a has two secondary 12a, each in series with a spark plug 10a.
  • This solution allows, for a four-cylinder engine, to have only two switch assemblies 38 associated with a single diagnostic assembly of the kind shown by a dashed line frame in FIG. 1. Only one of the assemblies 38 is shown in detail. in figure 3.
  • the comparators 24a and 34a receive respective reference voltages supplied by resistance bridges placed between the logic voltage V cc and the ground.
  • the set of two comparators also constitutes an OR circuit, which attacks the diagnostic input of the calculation and control unit 22 via a resistance-capacitance filter and an inverter 40.
  • Each of the IGBT transistors 18a can be controlled from a particular output pin of the calculation and control unit 22, for example by means of an assembly of the type described in the French patent application already mentioned.

Landscapes

  • 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)
EP93400517A 1992-03-03 1993-03-01 Elektronische Zündungsvorrichtung mit Spule für Brennkraftmaschine mit gesteuerter Zündung Withdrawn EP0559540A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9202529A FR2688272B1 (fr) 1992-03-03 1992-03-03 Dispositif d'allumage electronique a bobine pour moteur a allumage commande.
FR9202529 1992-03-03

Publications (1)

Publication Number Publication Date
EP0559540A1 true EP0559540A1 (de) 1993-09-08

Family

ID=9427297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400517A Withdrawn EP0559540A1 (de) 1992-03-03 1993-03-01 Elektronische Zündungsvorrichtung mit Spule für Brennkraftmaschine mit gesteuerter Zündung

Country Status (2)

Country Link
EP (1) EP0559540A1 (de)
FR (1) FR2688272B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654604A1 (de) * 1993-11-22 1995-05-24 Magneti Marelli France Verfahren und Vorrichtung einer Spulenzündung mit zusätzlichen Entladungen zur Diagnose
WO2000025021A1 (de) * 1998-10-26 2000-05-04 Robert Bosch Gmbh Verfahren und vorrichtung zur energieregelung an zündsystemen mit primärseitigem kurzschlussschalter
FR2820465A1 (fr) * 2001-02-05 2002-08-09 Siemens Automotive Sa Procede et dispositif de commande d'une bobine d'allumage d'un melange air/carburant dans un moteur a combustion interne
EP1469197A1 (de) * 2003-04-17 2004-10-20 Siemens VDO Automotive Verfahren zur Steuerung des Primärstroms eines Zündsystems einer fremdgezündeten Brennkraftmaschine
FR2958408A1 (fr) * 2010-04-01 2011-10-07 Continental Automotive France Dispositif et procede de mesure de courant pour controler au moins deux equipements electriques montes en cascade

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759155A1 (de) * 1977-12-31 1979-07-12 Bosch Gmbh Robert Schaltungsanordnung zur erfassung der funkendauer fuer regel- oder schaltsteuerungen
WO1989009333A1 (en) * 1988-04-02 1989-10-05 Robert Bosch Gmbh Observation of combustion in a spark ignition internal combustion engine
EP0344349A1 (de) * 1988-06-03 1989-12-06 Robert Bosch Gmbh Einrichtung zur Erkennung von Zündaussetzern bei fremdgezündeten Brennkraftmaschinen
EP0390314A2 (de) * 1989-03-23 1990-10-03 Ford Motor Company Limited Zündzeitpunktvorrichtung mit Korrektur bei Rückwirkung
EP0447975A1 (de) * 1990-03-19 1991-09-25 MARELLI AUTRONICA S.p.A. Zündsystem für innere Brennkraftmaschine
WO1992010673A1 (de) * 1990-12-10 1992-06-25 Robert Bosch Gmbh Zündanlage für brennkraftmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759155A1 (de) * 1977-12-31 1979-07-12 Bosch Gmbh Robert Schaltungsanordnung zur erfassung der funkendauer fuer regel- oder schaltsteuerungen
WO1989009333A1 (en) * 1988-04-02 1989-10-05 Robert Bosch Gmbh Observation of combustion in a spark ignition internal combustion engine
EP0344349A1 (de) * 1988-06-03 1989-12-06 Robert Bosch Gmbh Einrichtung zur Erkennung von Zündaussetzern bei fremdgezündeten Brennkraftmaschinen
EP0390314A2 (de) * 1989-03-23 1990-10-03 Ford Motor Company Limited Zündzeitpunktvorrichtung mit Korrektur bei Rückwirkung
EP0447975A1 (de) * 1990-03-19 1991-09-25 MARELLI AUTRONICA S.p.A. Zündsystem für innere Brennkraftmaschine
WO1992010673A1 (de) * 1990-12-10 1992-06-25 Robert Bosch Gmbh Zündanlage für brennkraftmaschinen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654604A1 (de) * 1993-11-22 1995-05-24 Magneti Marelli France Verfahren und Vorrichtung einer Spulenzündung mit zusätzlichen Entladungen zur Diagnose
FR2712934A1 (fr) * 1993-11-22 1995-06-02 Marelli Autronica Procédé et dispositif d'allumage à bobine, pour moteur à allumage commandé.
WO2000025021A1 (de) * 1998-10-26 2000-05-04 Robert Bosch Gmbh Verfahren und vorrichtung zur energieregelung an zündsystemen mit primärseitigem kurzschlussschalter
US6298837B1 (en) 1998-10-26 2001-10-09 Robert Bosch Gmbh Method and device for regulating power in ignition systems with a primary-side short-circuiting switch
FR2820465A1 (fr) * 2001-02-05 2002-08-09 Siemens Automotive Sa Procede et dispositif de commande d'une bobine d'allumage d'un melange air/carburant dans un moteur a combustion interne
EP1469197A1 (de) * 2003-04-17 2004-10-20 Siemens VDO Automotive Verfahren zur Steuerung des Primärstroms eines Zündsystems einer fremdgezündeten Brennkraftmaschine
FR2853941A1 (fr) * 2003-04-17 2004-10-22 Siemens Vdo Automotive Procede de controle du courant primaire d'allumage d'un moteur a combustion interne a allumage commande
US6883508B2 (en) 2003-04-17 2005-04-26 Siemens Vdo Automotive Method for controlling the primary ignition current of an internal combustion engine with controlled ignition
FR2958408A1 (fr) * 2010-04-01 2011-10-07 Continental Automotive France Dispositif et procede de mesure de courant pour controler au moins deux equipements electriques montes en cascade

Also Published As

Publication number Publication date
FR2688272A1 (fr) 1993-09-10
FR2688272B1 (fr) 1995-10-06

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