EP1299640B1 - Systeme d'allumage inductif comportant un dispositif de mesure de courant ionique - Google Patents

Systeme d'allumage inductif comportant un dispositif de mesure de courant ionique Download PDF

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Publication number
EP1299640B1
EP1299640B1 EP01931419A EP01931419A EP1299640B1 EP 1299640 B1 EP1299640 B1 EP 1299640B1 EP 01931419 A EP01931419 A EP 01931419A EP 01931419 A EP01931419 A EP 01931419A EP 1299640 B1 EP1299640 B1 EP 1299640B1
Authority
EP
European Patent Office
Prior art keywords
diode
ignition device
ignition
resistor
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
EP01931419A
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German (de)
English (en)
Other versions
EP1299640A1 (fr
Inventor
Markus Ketterer
Achim GÜNTHER
Juergen Foerster
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1299640A1 publication Critical patent/EP1299640A1/fr
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Publication of EP1299640B1 publication Critical patent/EP1299640B1/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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
    • F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
    • 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
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits

Definitions

  • the invention relates to an inductive ignition device for an internal combustion engine, having a primary coil and a secondary coil having ignition coil, wherein on the side of the secondary coil, a diode is provided, a spark plug having at least one electrode, and a measuring device for determining an ion current, according to claim 1, 1st part.
  • Efu diode In inductive ignition systems of motor vehicles with internal combustion engine is often in the circuit of the secondary coil, which provides the spark, a so-called Einschaltfunkenunterd Wegungs diode, hereinafter referred to as Efu diode, used, which suppresses a possibly resulting in the secondary coil current through the charging current of the primary coil current.
  • the measurement of the ion current flowing through the spark plug during the combustion process provides a means of monitoring the combustion process, for example, to detect combustion misfires, to detect knock, or to control ignition timing.
  • One possible way of measuring the ion current is via a measuring device connected in the circuit of the secondary winding, which measures the current flowing through the electrodes of the spark plug, especially during the period following the end of the spark.
  • the object of the invention is therefore to develop an ignition device of the type mentioned in such a way that the ion current measurement is protected from interference by residual charges.
  • the discharge device preferably contains a high-impedance resistor connected in parallel with the diode. It has been found that by bridging the Efu diode with a high-impedance resistor, the function of the Efu diode and the ignition device is not affected, while residual charges can flow in the available period.
  • the resistance is formed by an electrically conductive but high-resistance layer applied to the diode.
  • the high-resistance resistor (R) is realized by a doping on a device, which also has the diode (D).
  • the diode with the resistor connected in parallel can be arranged, for example, in the ignition coil, in a plug of the spark plug or in one of the high-voltage lines in the secondary coil circuit, which keeps the number of required components small.
  • the diode and the parallel resistor can be arranged on the high voltage side or low voltage side of the secondary winding.
  • FIG. 2 shows a known inductive ignition device 10.
  • the ignition device has an ignition coil ZS, which has a primary coil L 1 and a inductively with this coupled secondary coil L 2 contains.
  • the primary coil L 1 is connected to a battery with the battery voltage U ZS and is driven by a motor control unit 12 via a transistor T.
  • the circuit containing the primary coil L 1 will hereinafter be referred to as a primary coil circuit.
  • the ignition device 10 also includes a spark plug ZK, with one electrode, the secondary coil L 2 is connected at its high voltage end in the ignition mode end via an Efu diode D.
  • the second electrode of the spark plug ZK is connected to ground M.
  • the diode D is connected so that it allows the flow of current from the coil L 2 to the spark plug ZK.
  • the other, in the ignition operation low-voltage side end of the secondary coil L 2 is connected to a lonenstrommeß worn 14, which in turn is an example of mass M and supplies the ion current Si as a measured value.
  • the circuit containing the secondary coil L 2 will be referred to as a secondary coil circuit.
  • This stray capacitance C s is due to the characteristics of the ignition coil, the high voltage cable and the spark plug and can be electrically modeled by the capacity shown in the drawing.
  • the ignition process proceeds as known: First, the transistor T is switched by the motor control unit 12 to passage, so that in the primary coil L 1 can set a current flow. At the selected ignition timing of the transistor T is switched by the motor control unit 12 high impedance, so that the current flow in the primary coil circuit is interrupted. Via the inductive coupling, the magnetic field of the primary coil generates an induction current in the secondary coil L 2 . The number of turns of the coils are coordinated so that the coil L2 generates a high voltage pulse. The current direction is chosen so that a positive voltage is produced at the high-voltage side of the ignition coil L 2 .
  • an ion current measurement takes place, which records the current flow during combustion.
  • the ion current measuring device itself generates a voltage in the secondary coil circuit in order to move the ions to the electrodes of the spark plug. This ion current is measured by the Ionenstrommeß worn.
  • FIG. 1 Such a case example is shown in FIG.
  • the course of the measured between the diode D and the spark plug ZK secondary voltage U s is shown in the upper curve. It is good to see that after the end of the spark, a residual charge of about 3000 V remains, which subsequently degrades in two spontaneous gas discharges.
  • the lower curve shows the corresponding ion current signal in which the current flow due to the gas discharges appears as a peak.
  • Such interference falsify the measurement and complicate the evaluation of the data, especially for the detection of misfiring in which the expected ion current is yes zero.
  • the ignition device according to the invention also has the components shown in Figure 1, which will not be described again below. In FIGS. 1a and 1b, therefore, only the differences between the ignition device according to the invention and the one shown in FIG. 1 are shown.
  • a discharge device 16 is provided, via which a possibly existing residual charge to the mass M can flow.
  • the discharge device consists in the case shown of the assembly of the diode D and a resistor connected in parallel to her R.
  • the resistance R is chosen so that the function of the diode D and the igniter is not affected in total. As a suitable value, a resistance in the order of 10 M ⁇ has been found.
  • the diode D and the resistance R connected in parallel with it can either be arranged on the low-voltage side LV of the coil L 2 or, as shown in FIG. 1 b, on the high-voltage side HV of the coil L 2 , as shown in FIG.
  • the ignition device according to the invention works like the one described above. However, the bridging of the diode D through the resistor R causes trapped charge carriers via the resistor R to ground M can flow, so that it can not come to build up a residual charge between the diode D and the electrode of the spark plug ZK.
  • FIG. 4 shows the secondary voltage signal U S for an ignition spark with subsequent combustion misfire, analogous to the situation illustrated in FIG. 3, in an ignition device according to the invention. It can clearly be seen that the residual charge is almost completely reduced shortly after the end of the spark. Therefore, spontaneous gas discharges can not occur during the subsequent pressure reduction, so that no residual charge-related disturbances in the ion current signal Si occur and combustion misfires can be reliably detected via the ion current signal.
  • the resistor R can, except as a conventional component, for. B. be realized by a conductive coating or a conductive coating of the diode D. It is also conceivable to realize the resistor by doping on the same semiconductor device as the diode.
  • the combination of the diode D with the parallel resistor R can be space-saving, e.g. into the ignition coil, the plug connector or one of the high voltage lines 18 in the secondary coil circuit.

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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. Système d'allumage inductif pour un moteur à combustion interne, avec une bobine d'allumage (ZS) présentant une bobine primaire (L1) et une bobine secondaire (L2), dans lequel une diode de suppression des étincelles d'enclenchement (D) est prévue du côté de la bobine secondaire (L2), avec une bougie d'allumage (ZK) qui présente au moins une électrode ainsi qu'avec un dispositif de mesure pour la détermination d'un courant ionique (14),
    caractérisé en ce qu'
    un dispositif de dérivation (16) pour la dérivation d'une charge résiduelle existant entre la diode (D) et une électrode de la bougie d'allumage (ZK) est prévu.
  2. Système d'allumage selon la revendication 1,
    caractérisé en ce que
    le dispositif de dérivation (16) contient une résistance (R) à valeurs ohmiques très élevées, montée en parallèle à la diode (D).
  3. Système d'allumage selon la revendication 2,
    caractérisé en ce que
    la résistance (R) à valeurs ohmiques très élevées est formée par une couche conductrice appliquée sur la diode (D).
  4. Système d'allumage selon la revendication 2,
    caractérisé en ce que
    la résistance (R) à valeurs ohmiques très élevées est réalisée par un dopage sur un composant qui comporte aussi la diode (D).
  5. Système d'allumage selon l'une des revendications 2 à 4,
    caractérisé en ce que
    la diode (D) et la résistance (R) sont disposées dans la bobine d'allumage (ZS).
  6. Système d'allumage selon l'une des revendications 2 à 4,
    caractérisé en ce que
    la diode (D) et la résistance (R) sont disposées dans un connecteur de la bougie d'allumage (ZK).
  7. Système d'allumage selon l'une des revendications 2 à 4,
    caractérisé en ce que
    la diode (D) et la résistance (R) sont disposées dans une ligne à haute tension (18).
  8. Système d'allumage selon l'une des revendications 2 à 7,
    caractérisé en ce que
    la diode (D) et la résistance (R) sont disposées côté haute tension de la bobine secondaire (L2).
  9. Système d'allumage selon l'une des revendications 2 à 7,
    caractérisé en ce que
    la diode (D) et la résistance (R) sont disposées côté basse tension de la bobine secondaire (L2).
EP01931419A 2000-06-28 2001-04-06 Systeme d'allumage inductif comportant un dispositif de mesure de courant ionique Expired - Lifetime EP1299640B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10031553 2000-06-28
DE10031553A DE10031553A1 (de) 2000-06-28 2000-06-28 Induktive Zündvorrichtung mit Ionenstrommeßeinrichtung
PCT/DE2001/001343 WO2002001071A1 (fr) 2000-06-28 2001-04-06 Systeme d'allumage inductif comportant un dispositif de mesure de courant ionique

Publications (2)

Publication Number Publication Date
EP1299640A1 EP1299640A1 (fr) 2003-04-09
EP1299640B1 true EP1299640B1 (fr) 2006-04-05

Family

ID=7647127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01931419A Expired - Lifetime EP1299640B1 (fr) 2000-06-28 2001-04-06 Systeme d'allumage inductif comportant un dispositif de mesure de courant ionique

Country Status (5)

Country Link
US (1) US20030168050A1 (fr)
EP (1) EP1299640B1 (fr)
JP (1) JP2004502079A (fr)
DE (2) DE10031553A1 (fr)
WO (1) WO2002001071A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR202012010571U2 (pt) * 2012-05-04 2015-09-15 Ikat Do Brasil Comércio Imp Ação E Exportação Ltda vela de ignição para motores de combustão interna incoporando um diodo
US9429134B2 (en) 2013-12-04 2016-08-30 Cummins, Inc. Dual coil ignition system
DE102014219397A1 (de) * 2014-09-25 2016-03-31 Robert Bosch Gmbh Zündspule mit Diode und zusätzlichem Entstörelement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765391A (en) * 1971-02-22 1973-10-16 W Cook Transistorized ignition system
US5365910A (en) * 1991-05-14 1994-11-22 Ngk Spark Plug Co., Ltd. Misfire detector for use in internal combustion engine
DE19605803A1 (de) * 1996-02-16 1997-08-21 Daug Deutsche Automobilgesells Schaltungsanordnung zur Ionenstrommessung
JP3330838B2 (ja) * 1997-02-18 2002-09-30 三菱電機株式会社 内燃機関の燃焼状態検出装置
JP3338624B2 (ja) * 1997-02-18 2002-10-28 三菱電機株式会社 内燃機関の燃焼状態検出装置
JP3753290B2 (ja) * 1998-12-28 2006-03-08 三菱電機株式会社 内燃機関の燃焼状態検出装置

Also Published As

Publication number Publication date
JP2004502079A (ja) 2004-01-22
DE10031553A1 (de) 2002-01-10
DE50109445D1 (de) 2006-05-18
WO2002001071A1 (fr) 2002-01-03
EP1299640A1 (fr) 2003-04-09
US20030168050A1 (en) 2003-09-11

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