EP0386431B1 - Circuit de mesure de la tension primaire d'une bobine d'allumage - Google Patents

Circuit de mesure de la tension primaire d'une bobine d'allumage Download PDF

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Publication number
EP0386431B1
EP0386431B1 EP90101468A EP90101468A EP0386431B1 EP 0386431 B1 EP0386431 B1 EP 0386431B1 EP 90101468 A EP90101468 A EP 90101468A EP 90101468 A EP90101468 A EP 90101468A EP 0386431 B1 EP0386431 B1 EP 0386431B1
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EP
European Patent Office
Prior art keywords
voltage
primary voltage
input
circuitry according
circuitry
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
EP90101468A
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German (de)
English (en)
Other versions
EP0386431A2 (fr
EP0386431A3 (fr
Inventor
Bernd Bodig
Klaus Dipl.-Ing. Hueser
Achim Dipl.-Ing. Herzog
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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Publication date
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Publication of EP0386431A2 publication Critical patent/EP0386431A2/fr
Publication of EP0386431A3 publication Critical patent/EP0386431A3/fr
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Publication of EP0386431B1 publication Critical patent/EP0386431B1/fr
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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
    • F02P17/10—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
    • 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

Definitions

  • the invention relates to a circuit arrangement for measuring the primary voltage of an ignition coil according to the preamble of the main claim.
  • Circuits for measuring the primary voltage of ignition coils in motor vehicles which require transistors and Zener diodes to detect the spark duration of the spark. At the output of this circuit, only a digital signal is provided, which characterizes the spark duration.
  • the required transistors and Zener diodes are unfavorable for use in hybrid circuits, since these components represent a high manufacturing outlay.
  • the circuit arrangement for measuring the primary voltage of an ignition coil with the features of the main claim has the advantage that the spark duration can still be evaluated digitally and there is also the possibility of analogue detection of the primary voltage on two different scales.
  • a so-called static ignition voltage distribution With a plurality of ignition coils, all of the ignition coils can be monitored with regard to their primary voltage using the circuit arrangement according to the invention.
  • a plurality of input diodes are arranged on the input side, which form an input-side OR gate.
  • the analog primary voltage is divided by means of a voltage divider and reduced primary voltage is evaluated analog and digital. This means that both analog burning voltage detection and digital spark duration detection are possible. Transistors and Zener diodes are not required, which is why the circuit arrangement is well suited for implementation in hybrid technology.
  • the capacitor is averaged at the divider tap.
  • the following IC inputs can also be protected from overvoltages by means of a clamp circuit.
  • the differential amplifier is a comparator with switching hysteresis, the output voltage of which is used for digital spark duration detection.
  • the output signals of the circuit arrangement can be evaluated in the computer of the existing motor control and taken into account for control functions.
  • the circuit arrangement shown in FIG. 1 has two protective diodes D1, D2 at its two inputs for the primary voltages UP1, UP2 of two primary voltages, not shown, which form an input OR gate.
  • the respectively applied primary voltage UP1 or UP2 is multiplied by a factor using a voltage divider with divider resistors R1, R2 R2 / (R1 + R2) reduced.
  • the reduced primary voltage is averaged by means of a capacitor C1 connected in parallel with the divider resistor R2, which is supplied to an evaluation circuit 1 as an analog output voltage UA.
  • the battery voltage UB is divided by a second voltage divider with the resistors R3, R4, the divided battery voltage being supplied to the negative input of a differential amplifier 2 as a reference voltage UR.
  • a diode D3 is connected in series with the diode voltage UD to the resistor R4.
  • the divided primary voltage is present at the positive input of differential amplifier 2 via an input resistor R5. Between positive input of the differential amplifier 2 and its output, a feedback resistor R6 is effective.
  • the differential amplifier 2 connected in this way works like a comparator with switching hysteresis and outputs a digital output voltage UD, the duration of which corresponds to the spark duration.
  • the digital output voltage UD is also evaluated in the evaluation circuit 1.
  • the divided primary voltage occurring at the divider tap between the divider resistors R1 and R2 is clamped by means of a diode D5 and another low-resistance voltage divider, which consists of the resistors R7, R8.
  • the brackets are dimensioned such that primary voltages above the operating voltage are bracketed, the divider resistors R1 and R7 acting in parallel with R8 for these voltages. Voltages above the operating voltage can thus also be evaluated analogously in the evaluation circuit 1 on a changed scale.
  • the capacitor C1 must be chosen to be sufficiently small so that the analog evaluation of overvoltages is possible.
  • the diode D4 has the same function in relation to the battery voltage UB as the diode D5 in relation to the primary voltages UP1 and UP2.
  • the comparator designed as a differential amplifier 2 compares the divided primary voltage UA with the reference voltage UR, which is derived from the battery voltage UB by means of a voltage divider.
  • the comparator has a hysteresis which is determined by the resistors R5 and R6.
  • the evaluation circuit 1 which can be part of the motor control (not shown here), there is an analog primary voltage detection 3 and a digital one Spark duration detection 4. The values determined can be taken into account for control functions in the engine control.
  • the output voltages UA, UD can also be evaluated for error detection.
  • the time profile of a primary voltage UP is shown in FIG.
  • the associated output voltages UA and UD are shown in FIG. 3 and FIG. 4.
  • FIG. 3 shows the course of the analog output voltage UA with a broken line as it occurs without capacitor C1.
  • the capacitor C1 thus has the capacitance 0nF. If, on the other hand, a capacitor C1 is used as shown in FIG. 1, the curve of the voltage UA smoothes out in accordance with the voltage curve shown with a solid line.
  • the signal shown in Figure 4 indicates the spark duration T.

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)
  • Measurement Of Current Or Voltage (AREA)

Claims (6)

  1. Circuit de mesure de la tension primaire d'une bobine d'allumage comprenant un amplificateur de différence (2) qui reçoit en entrée un signal réduit obtenu à partir de la tension primaire et une tension de référence (UR) et fournit en sortie, un signal de durée de combustion (UD) de longueur correspondant à celle de la durée d'allumage de l'étincelle d'allumage, montage caractérisé en ce que la tension primaire (UP1, UP2) est prise par l'intermédiaire d'une diode de protection (D1, D2) branchée dans le sens passant et d'un diviseur de tension (R1, R2) pour être fournie à une entrée de l'amplificateur de différence (2) par l'intermédiaire d'une résistance (R5) et en ce que la tension primaire divisée (UA) qui arrive sur le diviseur de tension (R1, R2) est fournie à un dispositif d'exploitation analogique.
  2. Circuit selon la revendication 1, caractérisé en ce que sur la tension primaire divisée (UA), on forme une valeur moyenne à l'aide d'un condensateur (C1).
  3. Circuit selon l'une des revendications 1 ou 2, caractérisé en ce que l'on écrête la tension primaire divisée pour des valeurs de la tension primaire située au-dessus de la tension de combustion de l'étincelle d'allumage.
  4. Circuit selon la revendication 3, caractérisé en ce que pour écrêter la tension primaire divisée, on utilise un circuit d'écrêtage composé d'une diode (D5) reliée à la prise du diviseur de tension (R1, R2) et un autre diviseur de tension (R7, R8) faiblement ohmique en aval de la diode.
  5. Circuit selon l'une des revendications précédentes, caractérisé en ce que l'amplificateur de différence (2) a une hystérésis de commutation définie par une résistance d'entrée (R5) en amont de son entrée de mesure et une résistance de réaction (R6) agissant entre l'entrée de mesure et sa sortie.
  6. Circuit selon l'une des revendications précédentes, caractérisé en ce qu'à l'entrée du circuit, plusieurs diodes de protection (D1, D2) forment une porte OU d'entrée.
EP90101468A 1989-03-09 1990-01-25 Circuit de mesure de la tension primaire d'une bobine d'allumage Expired - Lifetime EP0386431B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907616A DE3907616A1 (de) 1989-03-09 1989-03-09 Schaltungsanordnung zur messung der primaerspannung einer zuendspule
DE3907616 1989-03-09

Publications (3)

Publication Number Publication Date
EP0386431A2 EP0386431A2 (fr) 1990-09-12
EP0386431A3 EP0386431A3 (fr) 1991-04-24
EP0386431B1 true EP0386431B1 (fr) 1994-06-15

Family

ID=6375916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101468A Expired - Lifetime EP0386431B1 (fr) 1989-03-09 1990-01-25 Circuit de mesure de la tension primaire d'une bobine d'allumage

Country Status (3)

Country Link
US (1) US5075627A (fr)
EP (1) EP0386431B1 (fr)
DE (2) DE3907616A1 (fr)

Families Citing this family (17)

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Publication number Priority date Publication date Assignee Title
DE4020986C2 (de) * 1990-07-02 1998-09-03 Telefunken Microelectron Elektronisches Zündsystem für eine Brennkraftmaschine
DE4107335A1 (de) * 1991-03-07 1992-09-10 Beru Werk Ruprecht Gmbh Co A Verfahren und vorrichtung zur zuendueberwachung einer zuendanlage
DE4331874C2 (de) * 1993-09-21 1999-07-01 Temic Semiconductor Gmbh Zündanlage für Brennkraftmaschinen mit einer ruhenden Zündspannungsverteilung
US5411006A (en) * 1993-11-08 1995-05-02 Chrysler Corporation Engine ignition and control system
DE69527702T2 (de) * 1995-04-28 2002-12-05 Daimlerchrysler Corp., Auburn Hills Methode und Schaltung zur Erkennung eines Zündfunkens in einer inneren Brennkraftmaschine
DE69533391D1 (de) * 1995-04-28 2004-09-23 St Microelectronics Srl Schaltung zur Erkennung einer Überspannung an einem elektrischen Verbraucher
DE19630305A1 (de) * 1996-07-26 1998-01-29 Bosch Gmbh Robert Schaltungsanordnung zur Messung der Zündspulenprimärspannung einer Zündanlage einer Brennkraftmaschine
DE59812578D1 (de) * 1997-08-12 2005-03-24 Siemens Ag Mess- und diagnoseeinrichtung für ein zündsystem einer brennkraftmaschine
US6278278B1 (en) 1998-08-12 2001-08-21 Siemens Aktiengesellschaft Measuring and diagnostic device for an ignition system of an internal combustion engine
JP2004187168A (ja) * 2002-12-05 2004-07-02 Sumitomo Electric Ind Ltd 回路構成、光受信器、及び光リンク
US8031452B2 (en) * 2008-07-10 2011-10-04 Siemens Industry, Inc. Single-supply single-ended high voltage peak detector
EP2507889B1 (fr) * 2009-11-30 2019-11-13 Forward Thinking Products LLC Dispositif d'émulation de batterie et procédés d'utilisation
JP5838776B2 (ja) * 2011-12-15 2016-01-06 富士電機株式会社 内燃機関用点火装置
US20180135590A1 (en) * 2016-11-15 2018-05-17 Woodward, Inc. Controlling Engine Ignition
WO2020132338A1 (fr) * 2018-12-21 2020-06-25 Champion Aerospace Llc Détection de la durée de vie d'un allumeur à étincelle
CZ309271B6 (cs) * 2019-12-18 2022-07-06 OZM Research s.r.o Vysokonapěťová diferenciální sonda a zařízení pro měření a vyhodnocování energie elektrického výboje
US12116967B2 (en) 2022-09-22 2024-10-15 Woodward, Inc. Measuring a spark of a spark plug

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE2626499A1 (de) * 1975-06-16 1976-12-23 Sun Electric Corp Einrichtung zur messung der ruhe- bzw. haltezeit eines automobilzuendsystemes
US4165481A (en) * 1977-09-15 1979-08-21 United Technologies Corporation Versatile ignition defeat and signal conditioning
US4395679A (en) * 1977-11-25 1983-07-26 Clayton Manufacturing Company Single sensor engine analyzer with noise rejection and automatic triggering circuit
DE2759155C2 (de) * 1977-12-31 1986-04-03 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zur Erfassung der Funkendauer in Zündeinrichtungen für Brennkraftmaschinen
US4377785A (en) * 1979-07-06 1983-03-22 Nippon Soken, Inc. Device for diagnosing ignition system for use in internal combustion engine
JPS5751960A (en) * 1980-09-11 1982-03-27 Nippon Soken Inc Ignition system diagnostic apparatus for internal combustion engine
DE3043255A1 (de) * 1980-11-15 1982-07-01 Robert Bosch Gmbh, 7000 Stuttgart Diagnosegeraet
JPS5786569A (en) * 1980-11-18 1982-05-29 Toshiba Corp Ignition detective circuit
US4399407B2 (en) * 1981-12-04 1999-02-09 Spx Corp Engine analyzer with constant width digital waveform display
US4918389A (en) * 1988-06-03 1990-04-17 Robert Bosch Gmbh Detecting misfiring in spark ignition engines

Also Published As

Publication number Publication date
EP0386431A2 (fr) 1990-09-12
DE59006090D1 (de) 1994-07-21
EP0386431A3 (fr) 1991-04-24
DE3907616A1 (de) 1990-09-20
US5075627A (en) 1991-12-24

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