EP0632199B1 - Méthode de commande d'une bobine d'allumage - Google Patents

Méthode de commande d'une bobine d'allumage Download PDF

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Publication number
EP0632199B1
EP0632199B1 EP94110260A EP94110260A EP0632199B1 EP 0632199 B1 EP0632199 B1 EP 0632199B1 EP 94110260 A EP94110260 A EP 94110260A EP 94110260 A EP94110260 A EP 94110260A EP 0632199 B1 EP0632199 B1 EP 0632199B1
Authority
EP
European Patent Office
Prior art keywords
ignition
current
pulse
coil
additional control
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
EP94110260A
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German (de)
English (en)
Other versions
EP0632199A3 (fr
EP0632199A2 (fr
Inventor
Martin Simeth
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0632199A2 publication Critical patent/EP0632199A2/fr
Publication of EP0632199A3 publication Critical patent/EP0632199A3/fr
Application granted granted Critical
Publication of EP0632199B1 publication Critical patent/EP0632199B1/fr
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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/12—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having means for strengthening spark during starting
    • 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

Definitions

  • the invention relates to a method for controlling an ignition coil the preamble of claim 1 and a circuit for performing the Procedure.
  • Electronic ignition systems generally consist of a control unit, an ignition output stage and the ignition coil with spark plug.
  • the control unit transmits to the ignition output stage whether they are loading or igniting the ignition coil should.
  • the ignition output stage loads the ignition coil up to a predetermined one Ignition current and keeps it constant until the ignition request, then discharges the ignition coil over the spark plug.
  • ignition current and burning time are very large chosen. Because such a large ignition energy is not when the engine is warmed up is necessary, the life of spark plugs is reduced.
  • a generic method is known from DE-A-28 10 665. There is an additional impulse sent the actual ignition pulse ahead and combined with it and extended the actual ignition pulse in a corresponding manner.
  • the disadvantage of the method is in that the current through the ignition coil cannot be deliberately limited.
  • the invention is based on the object of a method for actuation to design an ignition coil according to the preamble of claim 1 so that the control signals safely without additional effort on cables are transmitted and the ignition energy in accordance with the control signal is adjustable.
  • the invention which works with purely digital levels, uses the The fact that the signals relating to the normal ignition sequence (load and ignite), not fall below certain time ranges. So z. B. the minimal loading time for ignition coils at high engine speeds around 3 ms.
  • the Loading time of the ignition coil by a control signal in the control unit further impulse added.
  • Extra signal E which transmit the information "increase ignition current" should.
  • the ignition stage can register this pulse and at Provide the appropriate ignition energy.
  • the "Ignition" function suppresses the falling edge of pulse E because E with a duration of approx. 0.1 ms by itself no ignition request represents.
  • a larger ignition energy such as it is required, for example, for a cold start, in the form of a Ignition current increase provided.
  • Fig. 2 are three firing cycles with their control signals N1, N2, E and N3 shown.
  • the first two control signals N1 and N2 request one normal ignition current on, the ignition current should increase in the third cycle become.
  • An ignition current increase is communicated to the ignition output stage 2 by the Control signal St is analyzed at the beginning of the loading process (Fig. 2, third cycle).
  • the ignition output stage then limits the for one cycle Ignition current only from a higher threshold, the higher Ignition current. From this maximum, the coil current is limited.
  • Fig. 5 shows the current through the ignition coil. With the beginning of each cycle increases the current continues until the desired ignition current is reached. The The ignition output stage then keeps the current constant until the ignition occurs.
  • Fig. 6 shows one way in which the two signals from the Let control signal St win.
  • the Monoflop 5 covers together with the OR circuit 6 the pulse E and thus forms the signal SL "coil load ". If an impulse E im occurs within the 0.7 ms of the monoflop Control signal St on (AND circuit 7), the flip-flop 8 for the Charging time set and indicates at its output that the ignition current should be increased. The flip-flop 8 is reset after the ignition ("Load coil” becomes "low”).
  • the power transistor TR which drives the ignition coil 3 is implemented in this case as a “sense FET”.
  • a small sensor current proportional to the ignition coil current can be tapped at its additional output.
  • This sensor current is compared via the resistors R1 and OP1 with a reference current I ref in order to recognize whether the ignition current has already been reached.
  • the reference current "I ref small” (I ref1 ) or "I ref large” (I ref1 + I ref2 ) can be switched via a semiconductor switch S1 .
  • S1 is driven by the flip-flop in FIG. 6. When the switch is closed, the ignition current is increased.
  • R2, C and OP2 form an inverting integrator.
  • the Output voltage from OP2 is slowly lowered or increased, depending after the comparator OP1 exceeds or falls below the desired ignition current. If the ignition coil is to be loaded, switch S2 is in the position shown: the output of the Integrators OP2 is connected to the Power transistor switched.
  • the input of the voltage follower is switched on via switch S2 pulled to ground (the OR gate of Fig. 6 controls the Semiconductor switch S2).
  • the power transistor then interrupts the primary-side ignition coil current and on the secondary side of the ignition coil a spark is triggered in the spark plug.
  • control unit 1 variable advance of the additional control pulse E compared to the normal ignition pulse N3 generated and from the ignition output stage 2 Control signal St recovered and decoded. For example, by a clock generator the time interval between the two signals E, N3 measured that the pulses generated by it on a gate circuit get a counter.
  • the counter content is then proportional to the increase in the coil current St.
  • the signal "increase ignition current” ZE then does not consist of a single one Impulse, but from one of the sequence of the gate circuit passed counts.
  • this signal can also be used a proportional time signal can be obtained, which ultimately the duration of the spark plug according to the required ignition energy is controlled. This is done by short-circuiting the primary side of the Ignition coil 3, the energy stored in the ignition coil via a Free-wheeling diode is dissipated in a resistor.
  • the normal ignition pulse can have the burning time and / or the maximum Size of the ignition current also depends on the width of the additional Control pulse E can be determined. Determining the width of the transmitted pulse happens again in the ignition output stage analog to the procedure described above. So it is also thought of when increased Ignition energy the burning time of the candle with the maximum size of the Increase ignition current together.

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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)

Claims (7)

  1. Procédé pour modifier l'énergie d'allumage d'une bobine d'allumage avec une surveillance de courant raccordée, où des impulsions d'allumage sont transmises par un appareil de commande à un étage final d'allumage, caractérisé en ce qu'on insère entre deux impulsions d'allumage produites par un appareil de commande une impulsion de commande additionnelle (E) et qu'en fonction de cette impulsion de commande additionnelle (E), un limitateur de courant d'allumage est commuté à une valeur augmentée prédéterminée du courant d'allumage pour la bobine d'allumage, ou bien qu'une influence est exercée sur la durée de brûlage de la bougie d'allumage.
  2. Procédé selon la revendication 1, caractérisé en ce que l'étage final d'allumage (2) transforme l'impulsion de commande additionnelle (E) et l'impulsion d'allumage associée (N3) en une impulsion unitaire (N3').
  3. Procédé selon l'une des revendications 1 à 2, caractérisé en ce que la grandeur maximale du courant d'allumage et/ou la durée de brûlage est déterminée par le temps d'avance du flanc montant de l'impulsion de commande additionnelle (E) par rapport à l'impulsion d'allumage normale (N3).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la durée de brûlage et/ou la grandeur du courant d'allumage est déterminée par la largeur de l'impulsion de commande additionnelle (E).
  5. Procédé selon la revendication 2, caractérisé en ce qu'on constate sur la base de la brieveté de l'impulsion de commande additionnelle (E) avec l'impulsion d'un multivibrateur monostable (5), qu'il ne s'agit pas d'une impulsion d'allumage normale et que, par conséquent, une opération d'allumage n'est pas déclenchée.
  6. Disposition de montage pour la mise en oeuvre du procédé selon la revendication 1, caractérisée en ce qu'un appareil de commande (1) qui reçoit des indices de moteur, comme la température et la position angulaire du vilebrequin comme grandeur d'entrée, insère un signal de commandé (E) additionnel, dérivé de celle-ci entre deux impulsions d'allumage et le transmet à un étage final d'allumage (2) dont le flanc montant heurte un multivibrateur monostable (5) dont l'impulsion conjointement avec le signal de commande est transmise à la fois à un élément: ET (7) et également à un élément OU (6) dont la sortie sert de signal pour charger la bobine et pour la remise à l'état initial d'un flip-flop (8) qui, établi par l'élément ET (7), émet le signal pour augmenter le courant d'allumage.
  7. Disposition de montage selon la revendication 6, caractérisée en ce que le signal "augmenter courant d'allumage" au moyen d'un interrupteur (S1) sert à augmenter la tension d'entrée d'un premier amplificateur opérationnel (OP1) qui, par un amplificateur opérationnel additionnel (OP2), qui est commuté comme intégrateur, augmente le courant d'allumage dans la bobine d'allumage (3) en ce que, par un suiveur de tension et un transistor de puissance (TR), le courant dans l'enroulement primaire de la bobine d'allumage (3) augmente, et en ce que la sortie de l'étage OU (6) "bobine chargée" à un interrupteur semi-conducteur (S2) à l'entrée du troisième amplificateur opérationnel (OP3) est fermée aussi longtemps que la bobine d'allumage (3) doit être chargée.
EP94110260A 1993-07-02 1994-07-01 Méthode de commande d'une bobine d'allumage Expired - Lifetime EP0632199B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4322014A DE4322014C2 (de) 1993-07-02 1993-07-02 Verfahren zum Ansteuern einer Zündspule einer Zündeinrichtung für Brennkraftmaschinen und Schaltungsanordnung zur Durchführung des Verfahrens
DE4322014 1993-07-02

Publications (3)

Publication Number Publication Date
EP0632199A2 EP0632199A2 (fr) 1995-01-04
EP0632199A3 EP0632199A3 (fr) 1995-07-19
EP0632199B1 true EP0632199B1 (fr) 2000-02-02

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EP94110260A Expired - Lifetime EP0632199B1 (fr) 1993-07-02 1994-07-01 Méthode de commande d'une bobine d'allumage

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EP (1) EP0632199B1 (fr)
DE (2) DE4322014C2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419499A1 (de) 1994-06-03 1995-12-07 Interoc Vertriebsgesellschaft Hydraulisches Schlaggerät mit stufenlos regelbarer Schlagzahl und Schlagenergie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2810665A1 (de) * 1978-03-11 1979-09-20 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122475A (en) * 1979-03-15 1980-09-20 Nec Corp Pulse-current control circuit
JPS59110861A (ja) * 1982-12-16 1984-06-26 Mitsubishi Electric Corp 内燃機関点火装置
JPS59171219A (ja) * 1983-03-17 1984-09-27 Nec Corp レベル検出回路
DE3800932A1 (de) * 1988-01-15 1989-07-27 Telefunken Electronic Gmbh Schliesszeitregelung fuer brennkraftmaschinen mit ausgelagerter zuendendstufe
JPH06105070B2 (ja) * 1988-11-17 1994-12-21 株式会社日立製作所 半導体スイッチング回路
DE4007774A1 (de) * 1990-03-12 1991-09-19 Telefunken Electronic Gmbh Zuendanlage fuer viertakt-brennkraftmaschinen
DE4038440C2 (de) * 1990-12-01 1994-09-22 Telefunken Microelectron Elektronisches Zündsystem für Brennkraftmaschinen
DE4236397A1 (en) * 1991-11-09 1993-05-13 Volkswagen Ag Electronic ignition for automobile IC engine - uses controller supplying regulating current for end stage transistor in ignition module providing ignition coil current
JPH06131661A (ja) * 1992-10-15 1994-05-13 Kao Corp 磁気記録媒体の製造方法及び装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2810665A1 (de) * 1978-03-11 1979-09-20 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen

Also Published As

Publication number Publication date
EP0632199A3 (fr) 1995-07-19
DE4322014A1 (de) 1995-01-19
EP0632199A2 (fr) 1995-01-04
DE59409116D1 (de) 2000-03-09
DE4322014C2 (de) 1995-06-22

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