EP0461384B1 - Diagnosevorrichtung - Google Patents

Diagnosevorrichtung Download PDF

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Publication number
EP0461384B1
EP0461384B1 EP91107260A EP91107260A EP0461384B1 EP 0461384 B1 EP0461384 B1 EP 0461384B1 EP 91107260 A EP91107260 A EP 91107260A EP 91107260 A EP91107260 A EP 91107260A EP 0461384 B1 EP0461384 B1 EP 0461384B1
Authority
EP
European Patent Office
Prior art keywords
ignition
signal bus
capacitive
plug
coupling
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
EP91107260A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0461384A2 (de
EP0461384A3 (enrdf_load_stackoverflow
Inventor
Karl-Heinz Dittmann
Werner Bumen
Hans-Peter Dipl.-Ing. Gehlen
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 EP0461384A2 publication Critical patent/EP0461384A2/de
Publication of EP0461384A3 publication Critical patent/EP0461384A3/xx
Application granted granted Critical
Publication of EP0461384B1 publication Critical patent/EP0461384B1/de
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
    • 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
    • F02P2017/006—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines using a capacitive sensor

Definitions

  • the invention relates to a device for diagnosing multi-coil ignition systems according to the preamble of the main claim.
  • DE-U-89 10 945.7 discloses a generic device for detecting the high-voltage profile in ignition systems which contain several ignition coils.
  • the known device provides means for capacitive signal coupling, which are designed as attachable parts that can be attached to the individual ignition coils.
  • the individual plug-in parts are galvanically connected via a signal bus, which has a plug at one end.
  • the invention has for its object a simple and reliable device for diagnosing multi-coil ignition systems specify. This object is achieved by the features specified in the independent claim.
  • the device according to the invention for diagnosing multi-coil ignition systems has the advantage of simple adaptation. It is particularly advantageous that ignition cables lying between the ignition coils and the spark plugs need not be present.
  • the signals at the individual ignition coils are detected by means of capacitive signal coupling, which can be arranged on the ignition coils.
  • the individual means for capacitive signal coupling are connected to a signal bus which has a plug at one end. Additional capacitive couplings are provided between the individual means for capacitive signal coupling and the signal bus.
  • the particular advantage of this measure lies in the minimization of a capacitive coupling from the ignition coil to the ignition coil.
  • An adaptation error that is only present on an ignition coil or on a distributor, for example a short circuit of the means for capacitive signal coupling to ground, can be immediately recognized with a motor tester to which the diagnostic device according to the invention is connected.
  • a short-circuit would pull the potential of the bus as a whole and would make it impossible to locate the fault.
  • the further capacitive coupling can be implemented particularly simply in that the means for capacitive signal coupling, which are designed, for example, as metal angles Have tubular part through which the manifold is guided.
  • the amount of the coupling capacities can be specified by constructive measures.
  • the configuration of the signal bus as a spiral cable This measure considerably simplifies the adaptation to the ignition system, with a greater sagging of the signal bus being avoided. Different distances between the ignition coils or the distributors can be compensated.
  • the figure shows a multi-coil ignition system with a diagnostic device according to the invention.
  • the figure shows a first ignition coil 10 with two high-voltage connections 12, 14 on the secondary side.
  • the electrical equivalent circuit diagram 16 is shown within the ignition coil 10.
  • the first ignition coil 10 has two primary connections 18 which are connected to a primary winding 20. The two ends of the secondary winding 22 lead to the two high-voltage connections 12, 14.
  • a first means 24 for capacitive signal coupling between the ignition coil 10 and a signal bus 26 is arranged on the first ignition coil 10.
  • the capacitive coupling is illustrated by a first capacitor 28. Since the first capacitor 28 is not provided as a separate component, it is shown in broken lines in the figure.
  • the first means 24 has a tubular part 30 through which the signal bus 26 is guided. A capacitive coupling also takes place between the tube 30 and the signal bus 26, which is indicated in the figure by the second capacitor 32 shown in broken lines.
  • the electrical equivalent circuit diagram 40 of the second ignition coil 36 shows a primary winding 42 with connections 44 on the primary side. A connection of a secondary winding 46 is included one of the primary connections 44 is connected, while a second connection of the secondary winding 46 leads to the secondary-side high-voltage connection 38.
  • Second means 48 for capacitive signal coupling between the second ignition coil 36 and the signal bus 26 are provided on the second ignition coil 36. The capacitive coupling is indicated by a third capacitor 50, which is shown in broken lines in the figure, since it is not present as a separate component.
  • the second means 48 also have a tubular part 52 through which the signal bus 26 is guided. A further capacitive coupling takes place between the tubular part 52 and the signal bus 26, which is indicated by a fourth capacitor 54, which is shown in broken lines in the figure.
  • the device according to the invention for diagnosing multi-coil ignition systems works as follows:
  • the signal collecting line 26 provides an ignition analyzer with signals corresponding to the ignition processes, which can be connected via the plug 34.
  • the signals from the ignition system correspond to the voltages occurring at the ignition coils 10, 36, which are each removed by capacitive coupling 28, 50.
  • the capacitive couplings 28, 50 are entered between the secondary windings 22, 46 and the two means 24, 48, a general signal coupling takes place, which also detects signals from the primary windings 20, 42.
  • the voltages occurring in the secondary windings 22, 46 are considerable higher than the voltages occurring in the primary windings 20, 42, signals are predominantly coupled into the signal bus 26 which correspond to the secondary voltages.
  • the switching of the ignition coils 10, 36, the equivalent circuit diagrams 16, 40 of which are given, is of minor importance.
  • ignition coils with a high-voltage winding 46 grounded on one side and a high-voltage connection 38 on the secondary side or secondary windings 22 with two high-voltage connections 12, 14 each can be provided at each winding end.
  • the first ignition coil 10 is therefore part of a multi-coil ignition system with double-spark ignition coils
  • the second ignition coil 36 is part of a multi-coil ignition system with single-spark ignition coils.
  • the high-voltage connections 12, 14; 38 can be inaccessibly connected directly to spark plugs, not shown in the figure.
  • the two means 24, 48 for capacitive signal coupling between the ignition coils 10, 36 and the signal bus 26 are preferably designed as a metal plug-in part, which is respectively adapted to the ignition coils 10, 36.
  • the capacitive coupling 28, 50 is given by electrically conductive surfaces, which is given by the structure of the ignition coil 10, 36 and the metallic surface of the plug-in part 24, 48.
  • an arrangement is also possible, for example, on distributor housings in which the ignition coils 10, 36 are integrated.
  • the plug-on parts 24, 48 are connected to one another in an electrically conductive manner with the data bus 26.
  • the signal bus 26 is galvanically connected to the plug-in parts, for example by soldered connections or crimped connections 24, 48 connected.
  • Significant advantages result from a further capacitive coupling 32, 54 between the plug-on parts 24, 48 and the signal bus 26.
  • a simple implementation of these capacitive couplings 32, 54 is provided by clamping the line 26 with the plug-on parts 24, 48 without a galvanic connection. Clamping is possible, for example, by means of clips or with a tubular part 30, 52 shown in the figure.
  • the further capacitive couplings 32, 54 between the plug-on parts 24, 48 and the signal bus 26 bring with them the advantage of preventing capacitive coupling between the ignition coils 10, 36.
  • a faulty arrangement of only one plug-in part 24, 48 on an ignition coil 10, 36 does not lead to a total signal loss on the signal bus 26.
  • the potential of the device 24, 48 would be reduced by a galvanic connection Total signal line 26 pulled to ground and electrically make fault location impossible.
  • the further capacitive couplings 32, 54 enable the faulty connection of a plug-in part 24, 48 to the relevant ignition coil 10, 36 to be directly assigned with the aid of the ignition analyzer connected to the plug 34.
  • the amount of the coupling capacitances 32, 54 can be determined by constructive measures.
  • a further embodiment relates to the capacitive couplings 28, 50 between the ignition coils 10, 36 and the two means 24, 48.
  • the capacitive couplings 28, 50 can also be wound around the ignition coils 10 by winding the signal bus 26 around at least once , 36 may be provided.
  • the means 24, 48 for capacitive signal coupling are no longer required as a separate part.
  • This configuration is can be used particularly advantageously if the signal bus 26 is designed as a spiral cable.
  • the stretchable spiral cable adapts particularly well to the different external dimensions of the ignition coils 10, 36 or the distributor in which the ignition coils 10, 36 are integrated.
  • the design of the signal bus 26 as a spiral cable also has the advantage of simple adaptation of the diagnostic device according to the invention. With the stretchable spiral cable, several measuring points with different distances can be reached without the signal bus 26 sagging.
  • the amount of the coupling capacitances 32, 54 can be determined with the signal bus 26 designed as a spiral cable by specifying the number of turns in the tubular parts 30, 52.

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)
EP91107260A 1990-06-13 1991-05-04 Diagnosevorrichtung Expired - Lifetime EP0461384B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4018895A DE4018895C2 (de) 1990-06-13 1990-06-13 Diagnosevorrichtung
DE4018895 1990-06-13

Publications (3)

Publication Number Publication Date
EP0461384A2 EP0461384A2 (de) 1991-12-18
EP0461384A3 EP0461384A3 (enrdf_load_stackoverflow) 1994-01-19
EP0461384B1 true EP0461384B1 (de) 1997-04-23

Family

ID=6408322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107260A Expired - Lifetime EP0461384B1 (de) 1990-06-13 1991-05-04 Diagnosevorrichtung

Country Status (3)

Country Link
EP (1) EP0461384B1 (enrdf_load_stackoverflow)
DE (2) DE4018895C2 (enrdf_load_stackoverflow)
ES (1) ES2100899T3 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4040236A1 (de) * 1990-12-15 1992-06-17 Bosch Gmbh Robert Vorrichtung zum erfassen von signalen
DE4127969A1 (de) * 1991-08-23 1993-02-25 Bosch Gmbh Robert Verfahren zum detektieren einer kontaktierung von messleitungen
US5493496A (en) * 1992-12-15 1996-02-20 Ford Motor Company Cylinder number identification on a distributorless ignition system engine lacking CID
FR2732723B1 (fr) * 1995-04-05 1997-06-20 Peugeot Dispositif de detection de la phase de fonctionnement d'un moteur a allumage simultane par paires de cylindres, notamment pour vehicule automobile
DE10342533B3 (de) * 2003-09-12 2005-06-16 Siemens Ag Stabzündanordnung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959725A (en) * 1974-04-29 1976-05-25 Sun Electric Corporation Distributor voltage sensor
GB2062250A (en) * 1979-10-22 1981-05-20 Electrothermal Eng Ltd Detecting fault in insulated electric cable
US4758791A (en) * 1986-11-28 1988-07-19 United Technologies Corporation Universal secondary high voltage sensor
DE3641144C2 (de) * 1986-12-02 1995-07-13 Fichtel & Sachs Ag Spitzenspannungsmeßgerät
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
IT1206836B (it) * 1987-01-09 1989-05-11 Fiat Auto Spa Procedimento e dispositivo per il rilievo e la segnalazione di anomalie di funzionamento dell impianto di accensione di motori a combustione interna particolarmente per autoveicoli provvisti di marmitta catalitica
DE3705692C2 (de) * 1987-02-23 1995-12-07 Bosch Gmbh Robert Prüfeinrichtung für Zündverteiler
US4825167A (en) * 1987-11-02 1989-04-25 General Motors Corporation Spark plug testing under dynamic load
DE8910945U1 (de) * 1989-09-13 1989-10-26 Hermann, Horst, 8501 Cadolzburg Vorrichtung zur Messung des Sekundärspannungsverlaufes der Zündspulen eines Verbrennungsmotors

Also Published As

Publication number Publication date
DE4018895C1 (enrdf_load_stackoverflow) 1991-07-18
DE59108672D1 (de) 1997-05-28
EP0461384A2 (de) 1991-12-18
EP0461384A3 (enrdf_load_stackoverflow) 1994-01-19
DE4018895C2 (de) 1997-10-09
ES2100899T3 (es) 1997-07-01

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