EP0889235B1 - Vorrichtung zur Bestimmung der Phase des Zyklus für eine Brennkraftmaschine - Google Patents

Vorrichtung zur Bestimmung der Phase des Zyklus für eine Brennkraftmaschine Download PDF

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Publication number
EP0889235B1
EP0889235B1 EP19980401684 EP98401684A EP0889235B1 EP 0889235 B1 EP0889235 B1 EP 0889235B1 EP 19980401684 EP19980401684 EP 19980401684 EP 98401684 A EP98401684 A EP 98401684A EP 0889235 B1 EP0889235 B1 EP 0889235B1
Authority
EP
European Patent Office
Prior art keywords
sign
signal
ignition
phase
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
EP19980401684
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English (en)
French (fr)
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EP0889235A1 (de
Inventor
Denis Lambert
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0889235A1 publication Critical patent/EP0889235A1/de
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Publication of EP0889235B1 publication Critical patent/EP0889235B1/de
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
    • F02P15/08—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 multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
    • 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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/077—Circuits therefor, e.g. pulse generators

Definitions

  • the present invention relates to a determination device of the operating phase of a combustion engine internal.
  • the invention relates to a such a device which makes it possible to determine the operating phase an internal combustion engine with simultaneous ignition per pair of cylinders, in particular for a motor vehicle.
  • the secondary winding of this ignition coil is for example a mid-point winding and the winding primary of it receives an ignition control signal of the power stage.
  • the object of the invention is to propose a device of this type which has a simple and reliable structure.
  • the invention relates to a device for determining the operating phase of a motor internal combustion with simultaneous ignition by pair of cylinders in particular for a motor vehicle, in which candles associated with the cylinders of each pair are connected at the ends of a secondary winding of a coil ignition whose primary winding receives a signal ignition control of control means controlled by a engine operation control computer, characterized in that it includes means for determining the arithmetic mean value of the two output voltages secondary winding to deliver a binary signal comprising representative slots of the sign of this mean, means for measuring the time elapsing between the instant of control of the coil by the control means and the instant of change of state of the binary signal for at least two successive orders of the coil and means of analysis of these times to determine the phase of engine operation.
  • candles associated with cylinders of each pair are connected at the ends a secondary winding of an ignition coil, the primary winding is connected to piloted control means by an engine operation control computer.
  • the ignition coil is designated by the general reference 1, while the winding primary of it is designated by the general reference 2.
  • One of the end terminals of this primary winding 2 is connected for example to the positive terminal + bat of the battery vehicle power supply, while the other terminal end thereof is connected to control means of power designated by the general reference 3 on this figure, including for example a power transistor controlled by a computer 4 controlling the operation of the engine.
  • the secondary winding of the ignition coil is meanwhile designated by the general reference 5 and each of its ends is connected to a terminal of a candle, designated by general references 6 and 7, corresponding respectively to cylinder n ° 1 and to cylinder n ° 4 of the engine, associated in pair.
  • the computer 4 for controlling the operation of the engine allows by piloting means of power control 3 to apply a control signal ignition Vc to the spark plugs via the coil ignition 1.
  • FIGS. 2 and 3 This operation is illustrated in FIGS. 2 and 3, in which the references V HT 1 and V HT 4 represent the voltages at the terminals of the spark plugs 6 and 7 respectively of the corresponding pair of cylinders 1 and 4 and V PM represents the value arithmetic mean of these two tensions.
  • V HT 1 and V HT 4 are therefore of opposite signs and their arithmetic mean V PM is of the sign of the highest voltage, in absolute value.
  • the secondary voltages V HT 1 and V HT4 of the secondary winding of the ignition coil increase simultaneously and in opposite directions.
  • the voltage V PM remains close to O volt until the spark plug of cylinder No. 4 goes into a conductive state.
  • the voltage V PM continues to grow as rises the voltage V HT 1 until time t ionization ion of the corresponding spark plug.
  • cylinder No. 4 is in the compression phase and the voltage V PM takes the sign of the voltage V HT 4 between t o and t ion .
  • V PM therefore provides information on the cylinder in the compression phase.
  • This location can be done by acquiring the time elapsing between ignition control and change state of a signal Vs from the ignition coil, this signal being established for example from the value arithmetic mean of the two secondary winding voltages of it, to deliver a representative binary signal of the sign of this average.
  • This binary signal Vs then comprises representative slots for example of a negative sign of this value average.
  • the signal Vs after digital processing, indicates what is the cylinder in compression phase in the pair of cylinders connected to the controlled coil.
  • At least two successive detections can be planned to confirm the decision.
  • the signal used to make this determination phase is a logic signal from the ignition coil which can also be called phase signal.
  • This signal is produced from the voltages of the ignition coil outputs common to cylinders 1 and 4 for example, that is to say from the voltages V HT 1 and V HT 4, by means of conventional type for determining the arithmetic mean value of these two voltages, these means being designated by the general reference 8 in FIG. 1.
  • the output of these determination means 8 is connected for example to formatting means designated by the general reference 9 integrated for example in the computer 4 for checking the operation of the engine.
  • phase information is contained in the measurement of the time elapsing between the ignition command instant of cylinders n ° 1 and n ° 4 and the moment of change phase signal status.
  • the output of the shaping means 9 can be connected to a counter designated by the general reference 10, receiving a clock signal CLK and itself associated with means of storage designated by the general reference 11 and to a central information processing unit designated by the general reference 12, of the computer 4, itself connected to the power control means 3 described above to control the operation of the coil ignition and to counter 10 for resetting.
  • This measure must not be disturbed by the occupation of the central unit 12 to be used for a priority task.
  • the counter 10 is reset by the ignition control signal and the phase signal directly triggers the memorization of the state of the counter.
  • the purpose of signal processing is therefore to correspond to an ignition command of the corresponding coil, the number of the cylinder which is in the compression phase.
  • the information used is as indicated previously, the time elapsing between the order instant of ignition and the instant of change of signal state phase Vs.
  • This detection must be error free and the number of ignitions required must be minimal in order not to not extend the vehicle engine start time.
  • the acquired time tn-1 is compared to a value calibrated ts, in 18.
  • the acquisition is then incremented during step 21.
  • step 17 When acquiring the time corresponding to the second ignition command, as detected during step 17, the signed difference in time acquired during two successive acquisitions tn- (tn-1) is multiplied by the SGN sign previously memorized in 19 or 20, like this is illustrated in step 22.
  • ⁇ tn is then compared to a calibrated threshold, for example positive ts + which represents the magnitude of the transition required to consider the valid test, as illustrated by step 23.
  • the product with the memorized SGN sign validates that the transition has occurred in the expected direction.
  • ⁇ tn is greater than ts +, the phase is determined and the next top dead center of the engine will be known as function of ignition order and pair of cylinders on which the measurement is made. On the other hand if ⁇ tn is lower than ts +, the phase is indeterminate and it is repeated at from step 23, the strategy, using the last value of tn, for the next test.
  • steps 24, 25 and 26 you can determine what is the engine operating phase by determining from the next top dead center of a cylinder, to from the memorized sign SGN.
  • Figures 7 and 8 illustrate proper operation of the system which determines that the next point dead top will be the one corresponding to cylinder # 2 on the Figure 7 and cylinder # 3 in Figure 8.
  • FIGS 9 and 10 illustrate the case system malfunction due to improper calibration.
  • Figure 11 illustrates the case of a reiteration of treatment.
  • the determination device has an extremely simple structure and reliable which allows precise determination of the operating phase of a motor vehicle engine.

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)

Claims (4)

  1. Vorrichtung zur Bestimmung der Zyklusphase einer Brennkraftmaschine mit gleichzeitiger Zündung durch ein Zylinderpaar, insbesondere für Kraftfahrzeuge, bei der zu den Zylindern eines jeden Paars gehörige Zündkerzen (7, 6) mit den Enden einer Sekundärwicklung (5) einer Zündspule (1) verbunden sind, deren Primärwicklung (2) ein Zündeinstellungssignal (Vc) von Einstellungsmitteln (3) empfängt, die von einem Motorzyklussteuerrechner (4) gesteuert werden, dadurch gekennzeichnet, dass sie Mittel (8) zur Bestimmung des arithmetischen Mittelwerts der beiden Ausgangsspannungen der Sekundärwicklung (5) zum Abgeben eines Binärsignals (Vs), das Rechteckimpulse umfasst, die das Vorzeichen dieses Mittelwerts darstellen, Mittel (9, 10, 11, 12) zum Messen der Zeit, die zwischen dem Zeitpunkt einer Einstellung der Spule durch die Einstellungsmittel und dem Zeitpunkt der Zustandsänderung des Binärsignals (Vs) für mindestens zwei aufeinander folgende Einstellungen der Spule vergeht, und Mittel (12) zum Analysieren dieser Zeiten, um die Zyklusphase des Motors zu bestimmen, umfasst.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Zeitanalysemittel (12) Mittel zum Kontrollieren, dass diese zwischen Mindest- und Höchstschwellenwerten (tmin und tmax) liegen, Mittel zum Vergleichen der Zeit, die der ersten Einstellung entspricht, mit einem vorherbestimmten Schwellenwert (ts), um ein Vorzeichen (SGN) in Abhängigkeit von dem Ergebnis dieses Vergleichs zu speichern, Mittel zum Berechnen eines Differentialwerts (Δtn) durch Subtraktion der beiden Zeiten (tn-1, tn), die während aufeinander folgender Einstellungen der Spule erfasst werden, Mittel zum Multiplizieren des Differentialwertes (Δtn) mit dem gespeicherten Vorzeichen (SGN), Mittel zum Vergleichen des Ergebnisses dieser Multiplikation mit einem kalibrierten Schwellenwert (ts+), um die Bestimmung der Zyklusphase des Motors in Abhängigkeit von dem gespeicherten Vorzeichen (SGN) und dem Differentialwert (Δtn) zu bestätigen, umfassen.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Vorzeichen (SGN) ausgehend von der folgenden Relation aufgestellt wird:
    wenn t < ts, dann ist das Vorzeichen = +,
    wenn t ≥ ts, dann ist das Vorzeichen = -,
    wobei t für die entsprechende Zeit steht, und
    wobei ts für den vorherbestimmten Schwellenwert steht,
    und dadurch dass der kalibrierte Schwellenwert ein positiver Wert (ts+) ist.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zeitmessungsmittel einen Zähler (10) umfassen, der mit Speichermitteln (11) verknüpft ist und am Eingang ein Taktsignal (CLK) und das Phasensignal (Vs) empfängt und über eine Nullstellungsklemme das Einstellungssignal (Vc) von einer Zentraleinheit (12) des Rechners (4) empfängt.
EP19980401684 1997-07-04 1998-07-03 Vorrichtung zur Bestimmung der Phase des Zyklus für eine Brennkraftmaschine Expired - Lifetime EP0889235B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9708529A FR2765624B1 (fr) 1997-07-04 1997-07-04 Dispositif de determination de la phase de fonctionnement d'un moteur a combustion interne
FR9708529 1997-07-04

Publications (2)

Publication Number Publication Date
EP0889235A1 EP0889235A1 (de) 1999-01-07
EP0889235B1 true EP0889235B1 (de) 2002-12-18

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EP19980401684 Expired - Lifetime EP0889235B1 (de) 1997-07-04 1998-07-03 Vorrichtung zur Bestimmung der Phase des Zyklus für eine Brennkraftmaschine

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EP (1) EP0889235B1 (de)
DE (1) DE69810198T2 (de)
FR (1) FR2765624B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543936A (en) * 1984-09-17 1985-10-01 General Motors Corporation Sequential fuel injection sync pulse generator
US4795979A (en) * 1986-12-15 1989-01-03 Sun Electric Corporation Method and apparatus for determining cylinder #1 power firing event in wasted spark ignition systems
US4847563A (en) * 1988-07-12 1989-07-11 Snap-On Tools Corporation Distributorless ignition interface
FR2714116B1 (fr) * 1993-12-17 1996-01-26 Renault Procédé d'identification d'un cylindre de référence d'un moteur à combustion interne à allumage commande.

Also Published As

Publication number Publication date
DE69810198T2 (de) 2003-04-30
FR2765624A1 (fr) 1999-01-08
EP0889235A1 (de) 1999-01-07
DE69810198D1 (de) 2003-01-30
FR2765624B1 (fr) 1999-09-17

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