EP1003967B1 - Dispositif de mesure et de diagnostic pour le systeme d'allumage d'un moteur a combustion interne - Google Patents

Dispositif de mesure et de diagnostic pour le systeme d'allumage d'un moteur a combustion interne Download PDF

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Publication number
EP1003967B1
EP1003967B1 EP98949883A EP98949883A EP1003967B1 EP 1003967 B1 EP1003967 B1 EP 1003967B1 EP 98949883 A EP98949883 A EP 98949883A EP 98949883 A EP98949883 A EP 98949883A EP 1003967 B1 EP1003967 B1 EP 1003967B1
Authority
EP
European Patent Office
Prior art keywords
voltage
diag
measuring
diagnostic device
upr
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
EP98949883A
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German (de)
English (en)
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EP1003967A1 (fr
Inventor
Alfons Fisch
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1003967A1 publication Critical patent/EP1003967A1/fr
Application granted granted Critical
Publication of EP1003967B1 publication Critical patent/EP1003967B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
    • F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices

Definitions

  • the invention relates to a measuring and diagnostic device for an ignition system of an internal combustion engine according to the preamble of claim 1.
  • From DE 4039356 C1 is a circuit arrangement for determining the burning voltage of an ignition system of an internal combustion engine known which the on the primary side of an ignition coil transformed spark plug burning voltage by means of a Emitter follower switched voltage converter evaluates.
  • From DE 2759155 C2 is a circuit arrangement for detection the spark duration in ignition devices for internal combustion engines known, in which the primary-side Zünddozenssverlauf a transistor-controlled ignition coil means an integrator device and a downstream Having triggering means with a predetermined response voltage, converted into a square pulse, the duration of which Spark duration corresponds.
  • the primary ignition voltage located at the ignition switch has relatively high voltage levels that are above the input voltage range from standard op amps lie, particularly complicated clamping circuits are required. Besides, it is not alone with the comparators done, but it requires multiple peak memory as well as an evaluation logic.
  • the ignition switch Power output transistor
  • the spark duration to capture and take appropriate action, if this is outside of a specified setpoint range lies.
  • the primary-side ignition voltage has switched through power output stage a low level of the order of approx. 2V and rises after switching off the current flow through the Primary winding in the ignition moment briefly to about 300 to 400 V (spark plug) until it is on the secondary side of the spark plugs comes to a rollover.
  • the primary side is leveling off Ignition voltage to a value above the battery voltage Vbat on, from the battery voltage, the burning voltage the spark gap and the gear ratio the ignition coil depends.
  • the primary side Ignition voltage corresponding to one of the battery voltage Vbat Value back.
  • the primary-side ignition voltage Upr thus has a relatively high Voltage levels that are above the input voltage range integrated circuits are and special clamping circuits make necessary.
  • the present invention is based on the object, a in particular for integrated circuits suitable measuring and Diagnostic device for an ignition system of an internal combustion engine to create the relatively large level differences the primary-side ignition voltage in the interest Range through simple circuitry in one wide temperature range with a single reference voltage safely detectable and evaluable and at the same time in addition to generating a signal to measure the spark duration also monitors the ignition switch and on detection an error generates signals when it occurs, the ignition switch or the internal combustion engine by switching off before Destruction can be protected.
  • the circuit of the measuring and diagnostic device according to the invention advantageously consists of relatively few components, which are well suited for integration.
  • the single figure described below shows a block diagram of a measuring and diagnostic device according to the invention for an ignition system of an internal combustion engine.
  • a battery voltage Vbat for example, + 12V
  • the ignition switch 3 switches the primary current Ipr through the primary winding 2 of the ignition coil 1 periodically on and off by means of control signals Ust supplied thereto, resulting in the previously described profile of the ignition voltage Upr at the ignition switch 3, which is evaluated for measurement and diagnostic purposes.
  • Transistor T1 is part of a first control circuit 4, which from a first linear amplifier 8 switched operational amplifier consists. Its noninverting input "+” is connected to the connection point K1, the input of the control circuit between the collector of T1 and the protective resistor R1 connected.
  • the inverting input "-" is with a Reference voltage Uref (for example, + 3V) applied, which in this embodiment, from an auxiliary voltage Vcc (For example, + 5V) via a voltage divider R4, R5 won becomes.
  • Parallel to the resistor R5 is a capacitor C1 switched to hide any interference voltages.
  • Of the Output of the first linear amplifier 8 is connected to the base of connected to the first transistor T1.
  • the output of the first control circuit 4 is also connected to the noninverting input "+" of a first comparator 5 connected, whose inverting input "-" with a first Comparison voltage V1 (for example + 0.3V) applied is which, for example, from the auxiliary voltage Vcc (+ 5V) is obtained via a voltage divider R8, R9.
  • a diagnostic signal Taken from IGBT-Diag Taken from IGBT-Diag.
  • a second control circuit 7 with identical Structure provided as the first control circuit 4, a second transistor T2 and a second linear amplifier 9 wherein also here the inverting input "-" with the reference voltage Uref (+ 3V) is applied, and wherein the collector of the second transistor T2 and the non-inverting Input "+” of the second linear amplifier 9 via a Input K2 are connected, which on the one hand via a Resistor R2 with the battery voltage Vbat and on the other hand connected via a resistor R3 to the auxiliary voltage Vcc is.
  • the resistors R1, R2 and R3 can be used for better adaptation the circuit to different needs external, not be integrated resistors.
  • the output of the second control circuit 7 is connected to the non-inverting Input "+” connected to a second comparator 6, its inverting input "-" with the output of the first control circuit 4 is connected.
  • a measurement signal IGN-Diag can be tapped.
  • the circuit described above operates as follows: via the protective resistor R1 of the control circuit 4 is the Primary voltage Upr supplied.
  • the control circuit works like this, that it always tries to set a voltage at input K1, which is equal to the reference voltage Uref, preferably slightly larger than the maximum saturation voltage of the ignition switch is selected.
  • the differential voltage Upr-Uref drops across the protective resistor R1 by the linear amplifier increasing its output signal Vo> 0.7V so far as the transistor T1 controls so that the voltage Uref is present at the input K1.
  • a voltage Upr - Uref drops across the protective resistor R1.
  • a first current I1 (Upr - Uref) / R1.
  • the currents I1 and I2 can be used as (analog) reference currents serve, the comparator 6 as a current comparator may be formed, which the currents I1 and I2 by means Current mirror circuits (not shown) are supplied.

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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 (9)

  1. Dispositif de mesure et de diagnostic pour un système d'allumage d'un moteur à combustion interne, comprenant une bobine d'allumage (1) dont l'enroulement primaire (2) est raccordé à une tension d'accumulateur (Vbat), et un interrupteur d'allumage (3) qui interrompt périodiquement le courant (Ipr) s'écoulant dans l'enroulement primaire (2) de la bobine d'allumage (1),
       caractérisé en ce
    qu'un premier circuit de réglage (4) est prévu dont l'entrée (K1) est reliée à travers une résistance de protection (R1) au point de connexion de l'enroulement primaire (2) à l'interrupteur d'allumage (3),
    que le premier circuit de réglage (4) comprend un amplificateur linéaire (8) dont l'entrée non inverseuse (+) est connectée à l'entrée (K1) dont l'entrée inverseuse (-) est chargée par une tension de référence (Uref) et dont la sortie est reliée à la base d'un premier transistor (T1) dont le collecteur est connecté à l'entrée (K1) et dont l'émetteur est mis à la masse,
    que la sortie du premier circuit de réglage (4) qui est en même temps la sortie du premier amplificateur linéaire (8), est reliée à l'entrée non inverseuse (+) d'un premier comparateur (5) dont l'entrée inverseuse (-) est chargée par une première tension comparative (V1) et dont la sortie délivre un signal de diagnostic (IGBT-Diag),
    qu'un deuxième circuit de réglage (7) identique au premier circuit de réglage (4) est prévu contenant un deuxième amplificateur linéaire (9) et un deuxième transistor (T2), l'entrée (K2) du deuxième circuit de réglage étant connectée à travers une première résistance (R2) à la tension d'accumulateur (Vbat) et à travers une deuxième résistance (R3) à une tension auxiliaire (Vcc), et
    que la sortie du deuxième circuit de réglage (7) qui est en même temps la sortie du deuxième amplificateur linéaire (9), est reliée à l'entrée non inverseuse (+) d'un deuxième comparateur (6) dont l'entrée inverseuse (-) est reliée à la sortie du premier circuit de réglage (4) et dont la sortie délivre un signal de mesure (IGN-Diag).
  2. Dispositif de mesure et de diagnostic selon la revendication 1, caractérisé en ce que la résistance de protection (R1) et la première résistance (R2) présentent les mêmes valeurs de résistance.
  3. Dispositif de mesure et de diagnostic selon la revendication 1, caractérisé en ce que la tension de référence (Uref) est plus grande que la tension maximale de saturation de l'interrupteur d'allumage (3).
  4. Dispositif de mesure et de diagnostic selon la revendication 1, caractérisé en ce que le premier amplificateur linéaire (8)
    commande le premier transistor (T1) en non-conducteur (Vo = 0V) lorsque la tension primaire (Upr) est plus petite que la tension de référence (Uref), et
    commande le premier transistor (T1) en conducteur (Vo > 0,7V) lorsque la tension primaire (Upr) est plus grande que la tension de référence (Uref).
  5. Dispositif de mesure et de diagnostic selon l'une des revendications précédentes, caractérisé en ce que le premier amplificateur linéaire (8) fait ouvrir le premier transistor (T1) lorsque Upr > Uref jusqu'à ce qu'un premier courant I1 = (Upr - Uref)/R1 s'écoule à travers la résistance de protection (R1) qui provoque une chute de tension de Upr-Uref.
  6. Dispositif de mesure et de diagnostic selon la revendication 1, caractérisé en ce que la première tension de comparaison (V1) a une valeur de 0V < V1 < 0,7V.
  7. Dispositif de mesure et de diagnostic selon l'une des revendications précédentes, caractérisé en ce que la première et la deuxième résistance (R2, R3) sont dimensionnées telles que le deuxième courant (I2) correspondant à la somme des courants passant par les deux résistances
    est plus grand que le premier courant (I1) passant par la résistance de protection (R1) lorsque la tension primaire (Upr) correspond à la tension d'accumulateur (Vbat), ou
    est plus petit que le courant (I1) à travers la résistance de protection (R1) lorsque la tension primaire (Upr) correspond à la tension de décharge transformée au côté primaire.
  8. Dispositif de mesure et de diagnostic selon l'une des revendications précédentes, caractérisé en ce que le signal de commande (Ust) de l'interrupteur d'allumage (3), le signal de diagnostic (IGBT-Diag) et le signal de mesure (IGN-Diag) sont combinés de telle manière que des signaux d'erreur (F) sont générés lorsque :
    Ust = H et simultanément IGBT-Diag = H,
    Ust = L et simultanément IGBT-Diag = L,
    Ust = L et simultanément IGN-Diag = H,
    durée IGN-Diag < D1,
    durée IGN-Diag > D2.
  9. Dispositif de mesure et de diagnostic selon l'une des revendications précédentes, caractérisé en ce que le deuxième comparateur (6) est monté en comparateur de courant dont les entrées sont chargées par les premier et deuxième courants (I1, I2) par l'intermédiaire de circuits images de courant.
EP98949883A 1997-08-12 1998-08-12 Dispositif de mesure et de diagnostic pour le systeme d'allumage d'un moteur a combustion interne Expired - Lifetime EP1003967B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19734896 1997-08-12
DE19734896 1997-08-12
PCT/DE1998/002342 WO1999007995A1 (fr) 1997-08-12 1998-08-12 Dispositif de mesure et de diagnostic pour le systeme d'allumage d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1003967A1 EP1003967A1 (fr) 2000-05-31
EP1003967B1 true EP1003967B1 (fr) 2005-02-16

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EP98949883A Expired - Lifetime EP1003967B1 (fr) 1997-08-12 1998-08-12 Dispositif de mesure et de diagnostic pour le systeme d'allumage d'un moteur a combustion interne

Country Status (4)

Country Link
EP (1) EP1003967B1 (fr)
KR (1) KR100564083B1 (fr)
DE (1) DE59812578D1 (fr)
WO (1) WO1999007995A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3880948A4 (fr) * 2018-12-21 2023-02-22 Champion Aerospace LLC Détection de la durée de vie d'un allumeur à étincelle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10133005B4 (de) * 2001-07-06 2014-10-23 Volkswagen Ag Verfahren und Vorrichtung zum Erkennen der Unterbrechung der Spannungsversorgung einer Zündspule
FR2976627B1 (fr) * 2011-06-16 2013-07-19 Continental Automotive France Procede de diagnostic d'un defaut dans un systeme d'allumage pour moteur a combustion interne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5786569A (en) * 1980-11-18 1982-05-29 Toshiba Corp Ignition detective circuit
DE3907616A1 (de) * 1989-03-09 1990-09-20 Bosch Gmbh Robert Schaltungsanordnung zur messung der primaerspannung einer zuendspule
EP0740072B1 (fr) * 1995-04-28 2002-08-07 STMicroelectronics S.r.l. Méthode et circuit pour détecter la présence d'une etincelle dans un moteur à combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3880948A4 (fr) * 2018-12-21 2023-02-22 Champion Aerospace LLC Détection de la durée de vie d'un allumeur à étincelle
US11798324B2 (en) 2018-12-21 2023-10-24 Champion Aerospace Llc Spark igniter life detection

Also Published As

Publication number Publication date
KR20010022780A (ko) 2001-03-26
KR100564083B1 (ko) 2006-03-27
DE59812578D1 (de) 2005-03-24
WO1999007995A1 (fr) 1999-02-18
EP1003967A1 (fr) 2000-05-31

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