EP0389775A2 - Circuit pour la surveillance de la haute tension dans une installation d'allumage - Google Patents

Circuit pour la surveillance de la haute tension dans une installation d'allumage Download PDF

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Publication number
EP0389775A2
EP0389775A2 EP19900102944 EP90102944A EP0389775A2 EP 0389775 A2 EP0389775 A2 EP 0389775A2 EP 19900102944 EP19900102944 EP 19900102944 EP 90102944 A EP90102944 A EP 90102944A EP 0389775 A2 EP0389775 A2 EP 0389775A2
Authority
EP
European Patent Office
Prior art keywords
voltage
circuit
test voltage
arrangement according
circuit arrangement
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.)
Granted
Application number
EP19900102944
Other languages
German (de)
English (en)
Other versions
EP0389775A3 (fr
EP0389775B1 (fr
Inventor
Karl-Heinz Kugler
Christian Dipl.-Ing. Zimmermann
Hans Dipl.-Ing. Köhnle
Ernst Kaller
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0389775A2 publication Critical patent/EP0389775A2/fr
Publication of EP0389775A3 publication Critical patent/EP0389775A3/fr
Application granted granted Critical
Publication of EP0389775B1 publication Critical patent/EP0389775B1/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
    • 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 monitoring a high-voltage ignition system of an internal combustion engine of a motor vehicle or the like according to the preamble of the main claim.
  • the circuit arrangement according to the invention with the features of the main claim has the advantage over the fact that faults in the high-voltage ignition system are detected by shunts and / or short-circuits in the secondary winding of the ignition coil, the ignition harness or the spark plugs, so that remedial measures can be taken in good time. Accordingly, a catalyst protection function can be implemented with the use of the circuit arrangement according to the invention.
  • the test voltage corresponding to the primary current of the ignition coil when compared with the supply voltage of the high-voltage ignition system, allows a statement to be made about the state of the system.
  • the measuring arrangement in the primary circuit Ignition coil has lying shunt.
  • the voltage drop across the shunt is a measure of the primary current that occurs during an ignition process.
  • a filter circuit which is formed from a series connection of a resistor and a capacitor, is connected in parallel with the shunt.
  • the capacitor voltage forms the test voltage used to monitor the ignition system.
  • the comparison of the test voltage with the supply voltage ensures that primary current changes caused by changes in supply voltage do not lead to an error message.
  • the level of the supply voltage depends, for example, on the state of charge of the battery of the motor vehicle and also on the setting of the controller.
  • a particularly simple evaluation of measured values is possible by means of a comparator of the evaluation circuit, to which the test voltage and the supply voltage are supplied. If the test voltage in relation to the supply voltage exceeds a certain value, there is a secondary or short-circuit fault in the high-voltage ignition system.
  • the evaluation circuit for the voltage comparison preferably forms a reference value corresponding to the supply voltage.
  • the level of the test voltage is compared to the size of the reference value. If the battery voltage is assumed, one becomes the battery voltage of the motor vehicle corresponding reference value used for monitoring.
  • a further development of the invention is characterized in that the evaluation circuit uses at least one instantaneous value of the test voltage for the voltage comparison. Accordingly, in order to form the instantaneous value, the voltage rise of the test voltage is sampled at a correspondingly selected point in time.
  • the temporal position of the instantaneous value in relation to the duration of a primary current pulse is preferably in the first, earlier half of the primary current pulse, since errors caused by shunts and / or short circuits are particularly noticeable in the first half of the test voltage rise corresponding to the primary current profile.
  • the area representative of the fault detection can vary within the length of a primary current pulse, so that the temporal position of the instantaneous value of the test voltage with respect to the duration of a primary current pulse depends on the respective used ignition system is determined.
  • Monitoring is particularly simplified if the evaluation circuit issues the error message when the instantaneous value is larger than the reference value. Monitoring can be carried out in a simple manner using a comparator.
  • Figure 1 shows a circuit arrangement for monitoring a high-voltage ignition system of a burner Engine of a motor vehicle or the like. Monitoring takes place with regard to secondary and / or short circuits on the secondary side 1 of an ignition coil 2.
  • the primary winding 3 of the ignition coil 2 is connected at one end 4 to a supply voltage U V.
  • the supply voltage U V can be the battery voltage of the motor vehicle.
  • the other end 5 of the primary winding 3 is connected to an interrupter 6, which is connected to ground 8 via a shunt 7.
  • the other pole of the supply voltage U V is connected to ground 8; this is preferably the chassis of the motor vehicle.
  • the interrupter 6 is designed as a transistor T. Its base is controlled by a control circuit, not shown, of a control unit of the high-voltage ignition system; its collector-emitter path is connected to the primary circuit of the primary winding 3.
  • a filter circuit 9 Parallel to the shunt 7 is a filter circuit 9, which consists of a series connection of a resistor R and a capacitor C.
  • the capacitor voltage U C applied to the capacitor forms a test voltage U Pr .
  • the test voltage U Pr is fed to an evaluation circuit 10.
  • the shunt 7 forms, together with the resistor R and the capacitor C, a measuring arrangement 11, which by the converts the primary winding 3 of the ignition coil 2 flowing primary current i into a corresponding test voltage U Pr .
  • the measuring arrangement 11 is also supplied with the supply voltage U V or the battery voltage of the motor vehicle. It forms a reference value U R corresponding to the supply voltage U V or battery voltage.
  • the secondary winding 12 of the ignition coil 2 is connected with its high-voltage connection 13 to an electrode 14 of a spark plug 15.
  • the other electrode 16 is connected to ground 8.
  • FIG. 1 Faults that occur due to shunts and / or short circuits in the secondary winding 12, the ignition tableware (supply line to the spark plug and the like) and / or the spark plug 15 can — according to FIG. 1 — be represented and detected by a shunt resistor R N. Secondary-side shunts and / or short-circuits lead through the coupling of the secondary and primary sides of the ignition coil 2 to a reduction in the effective primary inductance L 1 .
  • FIG. 2 shows the equivalent circuit diagram of the ignition coil 2. This consists of the effective resistance R1 of the primary side, which is in series with a leakage inductance L S1 .
  • FIGS. 3 to 6 show the time profile of the test voltage U Pr corresponding to a primary current pulse for shunt resistances R N of different sizes.
  • FIG. 3 relates to a fault-free high-voltage ignition system, ie the shunt resistance R N is infinite.
  • the shunt resistance R N has the value 500 k ⁇ .
  • the shunt resistance value in FIG. 5 is 100 k ⁇ , and
  • FIG. 6 relates to the short circuit case, ie the shunt resistance R N has the value 0.
  • FIGS. 3 to 6 show that the course of the test voltage U Pr depends on the size of the shunt resistor R N. For the times t 1 to t 6, as an example in the figures mentioned, correspondingly different values result for the most part.
  • the measured value table in FIG. 7 provides an overview of this.
  • the test voltage value U Pr present at the respective point in time t 1 to t 2 is shown at the maximum test voltage value U Pr max (U Pr at the point in time t 1).
  • the ratio is expressed in percentages for an infinite, 500 k ⁇ , 100 k ⁇ and 0 shunt resistance.
  • At least one instantaneous value is preferably taken from the test voltage curve by scanning at a preselectable point in time. For the reasons described above, the sampling is preferably carried out in the first, earlier half of the pulse. Since the instantaneous value of the test voltage U Pr obtained by scanning is dependent on the size of the supply voltage U V or the battery voltage, the supply or battery voltage present at the time of the scanning is used as a comparison potential. If the test voltage U Pr exceeds a value dependent on the size of the supply or battery voltage, there is a secondary and / or short circuit fault on the secondary side 1 of the high-voltage ignition system, which leads to an error message being issued.
  • one of the supply or battery voltage is particularly advantageous forms the corresponding reference value, which is then used for the voltage comparison with the test voltage U Pr .
  • This voltage comparison can be carried out particularly easily with a comparator belonging to the evaluation circuit 10; there is an error if the test voltage U Pr is greater than the reference voltage U R.
  • the circuit arrangement according to the invention for monitoring the high-voltage ignition system represents a measure with regard to catalyst protection, because in the event of errors, clean combustion of the fuel is no longer guaranteed, so that the catalyst is subject to a high load in the event of a longer error duration, which can lead to damage.

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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)
EP90102944A 1989-03-25 1990-02-15 Circuit pour la surveillance de la haute tension dans une installation d'allumage Expired - Lifetime EP0389775B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909906A DE3909906A1 (de) 1989-03-25 1989-03-25 Schaltungsanordnung zur ueberwachung einer hochspannungszuendanlage
DE3909906 1989-03-25

Publications (3)

Publication Number Publication Date
EP0389775A2 true EP0389775A2 (fr) 1990-10-03
EP0389775A3 EP0389775A3 (fr) 1991-05-15
EP0389775B1 EP0389775B1 (fr) 1995-05-31

Family

ID=6377236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102944A Expired - Lifetime EP0389775B1 (fr) 1989-03-25 1990-02-15 Circuit pour la surveillance de la haute tension dans une installation d'allumage

Country Status (4)

Country Link
US (1) US5027073A (fr)
EP (1) EP0389775B1 (fr)
DE (2) DE3909906A1 (fr)
ES (1) ES2073464T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992021876A1 (fr) * 1991-05-31 1992-12-10 Caterpillar Inc. Systeme diagnostique pour un systeme d'allumage de decharge de condensateur
EP0502549A3 (en) * 1991-03-07 1993-12-01 Beru Werk Ruprecht Gmbh Co A Spark survey in spark ignition engine
EP0654604A1 (fr) * 1993-11-22 1995-05-24 Magneti Marelli France Procédé et dispositif d'allumage à bobine avec des décharges additionnelles pour diagnostics
US5672972A (en) * 1992-05-27 1997-09-30 Caterpillar Inc. Diagnostic system for a capacitor discharge ignition system

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5523691A (en) * 1990-07-26 1996-06-04 Unison Industries Limited Partnership Diagnostic device for gas turbine ignition system
US5155437A (en) * 1990-07-26 1992-10-13 Unison Industries Limited Partnership Diagnostic device for gas turbine ignition system
JPH07217520A (ja) * 1994-01-28 1995-08-15 Ngk Spark Plug Co Ltd 燃焼状態検出装置
JP3194676B2 (ja) * 1994-11-08 2001-07-30 三菱電機株式会社 内燃機関の失火検出装置
DE19524499B4 (de) * 1995-07-05 2008-11-13 Robert Bosch Gmbh Zündanlage für eine Brennkraftmaschine
US5606118A (en) * 1995-09-05 1997-02-25 Ford Motor Company System and method for detecting misfire in an internal combustion engine
FR2768186B1 (fr) * 1997-09-11 1999-10-15 Siemens Automotive Sa Procede et dispositif de diagnostic d'un systeme d'allumage pour moteur a combustion interne
US6717412B1 (en) 1999-09-24 2004-04-06 Snap-On Technologies, Inc. Ignition signal pickup interface box
FR2885651A1 (fr) * 2005-09-15 2006-11-17 Siemens Vdo Automotive Sas Procede de commande d'un courant primaire dans un circuit inductif
CN105781848A (zh) * 2011-07-07 2016-07-20 曹杨庆 汽油机能量多因素补偿点火电路
EP3276156B1 (fr) * 2016-07-29 2025-06-25 Caterpillar Motoren GmbH & Co. KG Procédé de détermination d'un défaut dans une bougie d'allumage d'un moteur à combustion interne
RU2738210C1 (ru) * 2020-03-12 2020-12-09 Акционерное общество "Уфимское научно-производственное предприятие "Молния" Способ контроля емкостного агрегата зажигания

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942102A (en) * 1973-05-25 1976-03-02 Siemens Aktiengesellschaft Spark ignited combustion engine analyzer
EP0020067B1 (fr) * 1979-05-25 1983-11-09 LUCAS INDUSTRIES public limited company Appareil pour tester les circuits électroniques d'allumage de moteurs à combustion interne
JPS56146925A (en) * 1980-04-16 1981-11-14 Hitachi Ltd Ignition and flame detector
JPS5786569A (en) * 1980-11-18 1982-05-29 Toshiba Corp Ignition detective circuit
US4418375A (en) * 1981-08-07 1983-11-29 Hunter Investment Company Solid state ignition system
US4449100A (en) * 1982-04-05 1984-05-15 Ford Motor Company Ignition system tester
GB8505875D0 (en) * 1985-03-07 1985-04-11 Ti Crypton Ltd Engine analysers
DE3629824A1 (de) * 1986-09-02 1988-03-10 Telefunken Electronic Gmbh Elektronische schaltung zur erkennung von zuendaussetzern
JPH0687642B2 (ja) * 1986-12-15 1994-11-02 株式会社日立製作所 回転電機の回転子巻線異常診断装置
DE3729824A1 (de) * 1987-09-05 1989-03-16 Peter Dipl Ing Wagner Befestigungswinkel aus metall
US4886029A (en) * 1988-05-26 1989-12-12 Motorola Inc. Ignition misfire detector
US4918389A (en) * 1988-06-03 1990-04-17 Robert Bosch Gmbh Detecting misfiring in spark ignition engines
DE3852390T2 (de) * 1988-06-03 1995-05-18 Bosch Gmbh Robert Einrichtung zur Erkennung von Zündaussetzern bei fremdgezündeten Brennkraftmaschinen.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0502549A3 (en) * 1991-03-07 1993-12-01 Beru Werk Ruprecht Gmbh Co A Spark survey in spark ignition engine
WO1992021876A1 (fr) * 1991-05-31 1992-12-10 Caterpillar Inc. Systeme diagnostique pour un systeme d'allumage de decharge de condensateur
US5672972A (en) * 1992-05-27 1997-09-30 Caterpillar Inc. Diagnostic system for a capacitor discharge ignition system
EP0654604A1 (fr) * 1993-11-22 1995-05-24 Magneti Marelli France Procédé et dispositif d'allumage à bobine avec des décharges additionnelles pour diagnostics
FR2712934A1 (fr) * 1993-11-22 1995-06-02 Marelli Autronica Procédé et dispositif d'allumage à bobine, pour moteur à allumage commandé.

Also Published As

Publication number Publication date
EP0389775A3 (fr) 1991-05-15
DE59009172D1 (de) 1995-07-06
US5027073A (en) 1991-06-25
EP0389775B1 (fr) 1995-05-31
DE3909906A1 (de) 1990-09-27
ES2073464T3 (es) 1995-08-16

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