EP0561807A1 - Dispositif pour l'acquisition de signaux. - Google Patents

Dispositif pour l'acquisition de signaux.

Info

Publication number
EP0561807A1
EP0561807A1 EP91919778A EP91919778A EP0561807A1 EP 0561807 A1 EP0561807 A1 EP 0561807A1 EP 91919778 A EP91919778 A EP 91919778A EP 91919778 A EP91919778 A EP 91919778A EP 0561807 A1 EP0561807 A1 EP 0561807A1
Authority
EP
European Patent Office
Prior art keywords
ignition
circuit arrangement
signals
arrangement
voltage
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
EP91919778A
Other languages
German (de)
English (en)
Other versions
EP0561807B1 (fr
Inventor
Karl-Heinz Dittmann
Werner Bumen
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 EP0561807A1 publication Critical patent/EP0561807A1/fr
Application granted granted Critical
Publication of EP0561807B1 publication Critical patent/EP0561807B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 detecting signals according to the preamble of the main claim. From the
  • US Pat. No. 4,795,979 discloses a device for determining the ignition pulse provided for a specific cylinder of an internal combustion engine.
  • the ignition system contains several ignition coils, two spark plugs each being connected to the secondary windings of the ignition coils.
  • This distributorless ignition system generates an ignition spark on each spark plug with each revolution of the internal combustion engine.
  • ignition sparks are therefore generated both in the working cycle and in the exhaust cycle.
  • three capacitive signal decouplings are provided, which are arranged on the ignition cables leading from the ignition coils to the spark plugs.
  • the known device requires the accessibility of the ignition cable for attaching the sensors. The decoupled signals go to different signal evaluation circuits. From US Pat. No.
  • the invention has for its object to provide a simple device with little wiring for diagnosing multi-coil ignition systems.
  • the device according to the invention for detecting signals on an ignition coil system which contains more than one ignition coil has the advantage of simple adaptation. It is particularly advantageous that conventional ignition cables no longer have to be present between the ignition coils and the spark plugs.
  • the means for capacitive signal decoupling are suitably arranged directly on the ignition coils or on the housings that contain the ignition coils.
  • the circuit arrangement provided according to the invention for merging the decoupled signals reduces the wiring effort. Only connections between the capacitive signal decoupling and the circuit arrangement are required, from where only a single further line can be provided. The circuit arrangement must be arranged in the immediate vicinity of the ignition system, so that a short line routing, in particular of the individual lines leading to the capacitive signal decoupling, is possible.
  • the means for capacitive signal decoupling provide signals that correspond to the high voltage at the ignition coils. These signals are combined in the circuit arrangement and can be analyzed in a further diagnostic device.
  • the device according to the invention is suitable for diagnosis on multi-coil ignition systems, the connection of the secondary windings of the ignition coils being arbitrary. For example, secondary windings grounded on one side with a high-voltage connection and arrangements with spark plug connections can be provided at both ends of the secondary windings.
  • a particularly advantageous development provides that further capacitive couplings are provided between the means for capacitive signal coupling and the circuit arrangement for merging the decoupled signals.
  • the main advantage of these further capacitive couplings lies in the potential separation between the means for capacitive signal decoupling and the further circuit arrangement.
  • An adaptation error that is only present on an ignition coil or on an ignition coil housing, for example a short circuit to ground, does not affect the other detected signals.
  • the further diagnostic device can be designed in such a way that the defective or incorrectly connected means for capacitive signal decoupling can be identified.
  • At least one adjustment element is arranged in the circuit arrangement for calibrating the level of the signal which can be tapped at the output of the circuit arrangement. It is particularly advantageous if adjustment means for calibrating the signal level are assigned to the individual means for capacitive signal extraction. With this measure, the signals emitted by differently designed means for capacitive signal coupling can be calibrated. The signals are then directly comparable in terms of the signal level.
  • voltage limiters are advantageously provided at the inputs of the circuit arrangement.
  • FIG. 1 shows a sketch of a device according to the invention for detecting signals on an ignition system and FIG. 2 shows an equivalent circuit diagram.
  • FIG. 1 shows an ignition system which contains two ignition coils 11, 12.
  • An equivalent circuit diagram 13, 14 of the ignition coil 11, 12 is shown in the ignition coils 11, 12.
  • Primary connections 15, 16; 17, 18 of the ignition coils 11, 12 lead to ignition switching devices, not shown in FIG. 1.
  • a secondary connection 19, 20 of a secondary winding 21, 22 leads to a high-voltage connection 23, 24.
  • Means 25, 26 for capacitive signal coupling are respectively arranged on the ignition coils 11, 12.
  • the capacitive coupling is illustrated in each case by a capacitor 27, 28. Since the capacitor 27, 28 is not present as a separate component, it was entered in broken lines in FIG. 1.
  • the means 25 assigned to the ignition coil 11 is connected via a balancing arrangement 29 and a connecting line 30 and via a plug connection 31 to a circuit arrangement 32 which has an output 33.
  • the means 26 assigned to the ignition coil 12 is connected to the circuit arrangement 32 via a plug connection 34, a connecting line 35 and a plug connection 36.
  • FIG. 2 shows an equivalent circuit diagram of the device shown schematically in FIG. 1. Those parts shown in FIG. 2 which correspond to the parts shown in FIG. 1 have the same reference numbers as in FIG. 1.
  • the circuit arrangement 32 contains voltage-limiting elements, each consisting of two diodes 37, 38; 39, 40 are composed.
  • the voltage limiting elements 37, 38; 39, 40 are each between Input lines 41, 42 of the circuit arrangement 32 and a ground 43 are connected.
  • a resistor 44 and a capacitor 45 are connected in parallel with the output 33.
  • the inputs 41, 42 are each connected to the output 33 via capacitors 46, 47.
  • the output 33 leads to a further diagnostic device 48.
  • the device according to the invention works as follows:
  • the ignition system 10 contains a plurality of ignition coils 11, 12, which are provided, for example, for staggered ignition of a plurality of cylinders of an internal combustion engine.
  • a conventional distributor is no longer available.
  • connecting lines between the ignition coils 11, 12 and spark plugs are no longer accessible.
  • the spark plugs are connected there directly to the high-voltage connections 23, 24.
  • the means 25, 26 for capacitive signal decoupling are provided according to the invention.
  • the means 25, 26 are preferably designed as plug-on parts which can have special shapes for adaptation to different ignition coils 11, 12.
  • the capacitive coupling between the means 25, 26 and the secondary windings 21, 22 of the ignition coils 11, 12 is illustrated by the coupling capacitor 27, 28, which is not provided as a separate component.
  • a coupling also takes place to the primary side of the ignition coils 11, 12.
  • the voltages occurring in the secondary winding 21, 22 are generally many times higher than those on the primary side, so that the voltage coupled into the means 25, 26 is always a measure of the voltage occurring at the ignition coils 11, 12 on the secondary side .
  • the signals capacitively coupled out by the means 25, 26 are combined in the circuit arrangement 32.
  • the means 25, 26 can be connected to the arrangement 32 via connecting lines 30, 35 and via plug connections 31, 36. In a simpler embodiment, the plug connections 31, 36 can be omitted.
  • the circuit diagram shown in FIG. 2 shows the signal merging in the circuit arrangement 32.
  • the merging of the individual signals is possible via galvanic connections.
  • capacitors 46, 47 are preferably provided for potential isolation. With this measure it is achieved that a faulty adaptation of a means 25, 26 does not lead to failure of the entire arrangement. Protection is given in particular against a short circuit of one of the means 25, 26 against ground 43.
  • the capacitors 46, 47 avoid a time-consuming search for the means 25, 26 which are short-circuited to ground.
  • the diagnostic device 48 which further analyzes the signals brought together at the output 33, makes it easy to identify the incorrectly connected means 25, 26 on the basis of a time-related representation of the signals.
  • the circuit arrangement 32 contains voltage-limiting means 37, 38; 39, 40.
  • Fast limiter diodes 37, 38; are particularly suitable here.
  • 39, 40 which are connected to ground 43 at the inputs 42, 41, respectively.
  • the diodes 37, 38; 39, 40 shown as series connections with different polarizations of the diodes 37, 38; 39, 40. In principle, other circuits are also suitable.
  • the voltage-limiting means 37, 38; 39, 40 may be provided in the alignment arrangement 29. With this arrangement of the means 37, 38; 39, 40 dangerously high voltages are suppressed close to the source. Capacitive signal couplings in the subsequent circuit arrangements 32 and between lines 30, 35 are minimized. An adaptation of the voltage level or a calibration of the entire arrangement is possible with the capacitor 45, which is designed as a balancing element with variable capacitance. The capacitor 45 forms a voltage divider with the replacement capacitors 27, 28 shown in FIG.
  • the relatively high division ratio which must reduce the voltages in the kV range at the ignition coils 11, 12 to values that can be easily further processed, leads to a relatively high capacitance value of the capacitor 45, so that the variable capacitance of this capacitor 45 is preferably due to parallel and / or series connections from several capacitors is to be simulated.
  • the adaptation or calibration with the capacitor 45 simultaneously affects the signals at the inputs 41, 42.
  • An individual calibration of the individual means 25, 26 is possible with the adjustment arrangement 29, which is assigned to the corresponding means 25, 26.
  • the adjustment arrangement 29 is structurally combined with the means 25, 26, for example. It contains a matching circuit, not shown in the figures, which preferably also contains a capacitive voltage divider. The adjustment arrangement 29 can advantageously also be accommodated in the circuit arrangement 32.
  • plug connections 34 on the means 25, 26 Another embodiment provides for the use of plug connections 34 on the means 25, 26.
  • the adjustment arrangement 29 is preferably integrated in the plug connection 34.
  • the plug connection 34 enables the means 25, 26 to be exchanged quickly.
  • the connecting lines 30, 35 present between the means 25, 26 and the circuit arrangement 32 can be single-core lines. Shielded lines 30 are preferably provided, which reduce interference signal coupling. The cable capacity in the shielded cables can easily be taken into account when calibrating the entire arrangement.

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)

Abstract

Il est proposé un diapositif pour l'acquisition de signaux sur un système d'allumage (10) contenant plus d'une bobine d'allumage (11, 12). Pour l'acquisition des signaux par couplage capacitif sont prévus des moyens (25, 26) pouvant être fixés au moins à proximité de chaque bobine d'allumage (11, 12). Les signaux acquis par les moyens (25, 26) sont réunis dans un circuit (32). Le dispositif selon l'invention convient en particulier au diagnostic de systèmes d'allumage (10) sans distributeur.
EP91919778A 1990-12-15 1991-11-21 Dispositif pour l'acquisition de signaux Expired - Lifetime EP0561807B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4040236 1990-12-15
DE4040236A DE4040236A1 (de) 1990-12-15 1990-12-15 Vorrichtung zum erfassen von signalen
PCT/DE1991/000914 WO1992010674A1 (fr) 1990-12-15 1991-11-21 Dispositif pour l'acquisition de signaux

Publications (2)

Publication Number Publication Date
EP0561807A1 true EP0561807A1 (fr) 1993-09-29
EP0561807B1 EP0561807B1 (fr) 1996-10-16

Family

ID=6420498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91919778A Expired - Lifetime EP0561807B1 (fr) 1990-12-15 1991-11-21 Dispositif pour l'acquisition de signaux

Country Status (6)

Country Link
US (1) US5444376A (fr)
EP (1) EP0561807B1 (fr)
JP (1) JP3212601B2 (fr)
AU (1) AU646315B2 (fr)
DE (2) DE4040236A1 (fr)
WO (1) WO1992010674A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4443304A1 (de) * 1994-12-06 1996-06-13 Bosch Gmbh Robert Vorrichtung zum Erfassen von Signalen
US6411096B1 (en) 1998-03-06 2002-06-25 Snap-On Tools Company Scope analyzer for direct ignition engines
DE19910416A1 (de) * 1999-03-10 2000-09-14 Bosch Gmbh Robert Vorrichtung zum Erfassen von Signalen an einer Zündanlage
US6717412B1 (en) 1999-09-24 2004-04-06 Snap-On Technologies, Inc. Ignition signal pickup interface box
US6969995B2 (en) * 2002-09-05 2005-11-29 Florian Virchow Measuring device for ignition voltages
US6940283B2 (en) * 2003-03-20 2005-09-06 Snap-On Incorporated Detecting field from different ignition coils using adjustable probe
US20040239331A1 (en) * 2003-03-21 2004-12-02 Mcqueeney Kenneth Dual capacitive-coupled sensor for hybrid ignition coil
US7009400B1 (en) * 2004-02-06 2006-03-07 Snap-On Incorporated Universal capacitive adapter for engine diagnostics
US7002351B1 (en) * 2004-02-27 2006-02-21 Snap-On Incorporated Variable compensation circuit for capacitive adapters
DE102006025073A1 (de) * 2006-05-30 2007-12-06 Robert Bosch Gmbh Zündspule
US8490598B2 (en) * 2009-08-20 2013-07-23 Ford Global Technologies, Llc Ignition coil with ionization and digital feedback for an internal combustion engine

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Publication number Priority date Publication date Assignee Title
FR2237071B3 (fr) * 1973-07-12 1977-05-06 Siemens Ag
US3959725A (en) * 1974-04-29 1976-05-25 Sun Electric Corporation Distributor voltage sensor
US4052665A (en) * 1976-03-30 1977-10-04 Snap-On Tools Corporation Capacitive pickup device for pulsating high voltage measurements
FR2474173A1 (fr) * 1980-01-17 1981-07-24 Renault Capteur de synchronisme pour moteur a allumage commande
US4349782A (en) * 1980-11-21 1982-09-14 Doss James D Shielded differentiator for automotive ignition applications
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
DE3705692C2 (de) * 1987-02-23 1995-12-07 Bosch Gmbh Robert Prüfeinrichtung für Zündverteiler
DE3733401C1 (de) * 1987-10-02 1989-04-27 Bodo Dipl-Ing Dip Liebergesell Pruefschaltung zum Einstellen der Synchronisation einer Doppelzuendanlage
DE3924130A1 (de) * 1989-07-20 1991-01-31 Bosch Gmbh Robert Vorrichtung zur erkennung fehlender oder schlechter verbrennungen in otto-motoren
CA2018601A1 (fr) * 1989-09-08 1991-03-08 Thomas P. Becker Sonde de champ magnetique pour le diagnostic du circuit d'allumage d'un vehicule automobile
US5004984A (en) * 1989-09-08 1991-04-02 Snap-On Tools Corporation Magnetic field pickup assembly for diagnositics on specific engine
DE8910945U1 (de) * 1989-09-13 1989-10-26 Hermann, Horst, 8501 Cadolzburg Vorrichtung zur Messung des Sekundärspannungsverlaufes der Zündspulen eines Verbrennungsmotors
DE4018895C2 (de) * 1990-06-13 1997-10-09 Bosch Gmbh Robert Diagnosevorrichtung
DE9109457U1 (de) * 1991-07-31 1991-10-10 Berenz, Lorenz, 7209 Gosheim Brause

Non-Patent Citations (1)

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Title
See references of WO9210674A1 *

Also Published As

Publication number Publication date
WO1992010674A1 (fr) 1992-06-25
DE59108288D1 (de) 1996-11-21
EP0561807B1 (fr) 1996-10-16
JPH06503138A (ja) 1994-04-07
JP3212601B2 (ja) 2001-09-25
US5444376A (en) 1995-08-22
DE4040236A1 (de) 1992-06-17
AU8922991A (en) 1992-07-08
AU646315B2 (en) 1994-02-17

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