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EP0142817A2 - Méthode de test pour système d'allumage de moteur à combustion interne - Google Patents

Méthode de test pour système d'allumage de moteur à combustion interne Download PDF

Info

Publication number
EP0142817A2
EP0142817A2 EP84113722A EP84113722A EP0142817A2 EP 0142817 A2 EP0142817 A2 EP 0142817A2 EP 84113722 A EP84113722 A EP 84113722A EP 84113722 A EP84113722 A EP 84113722A EP 0142817 A2 EP0142817 A2 EP 0142817A2
Authority
EP
European Patent Office
Prior art keywords
test
operating state
spark plug
ignition
combustion engine
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
EP84113722A
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German (de)
English (en)
Other versions
EP0142817A3 (en
EP0142817B1 (fr
Inventor
Walter Weishaupt
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0142817A2 publication Critical patent/EP0142817A2/fr
Publication of EP0142817A3 publication Critical patent/EP0142817A3/de
Application granted granted Critical
Publication of EP0142817B1 publication Critical patent/EP0142817B1/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 test method for ignition systems of internal combustion engines in motor vehicles.
  • the ignition system is checked for proper function. For this purpose, a characteristic value of the ignition voltage signal, for example the maximum value, is compared with a predetermined target value. As an alternative to this, the ignition voltage signal can also be compared with a corresponding signal from another cylinder or the ignition voltage signal of all cylinders. If these signals are the same as each other, the ignition device is OK, but if one or more of these signals deviate greatly from one another, the ignition system is likely to be faulty. However, this only allows a relatively rough statement about the condition of the ignition system.
  • the invention has for its object to provide a test method of the type mentioned, which provides precise information about the element determining the condition of the ignition system and thus about the ignition system as such.
  • the invention solves this problem in that, in order to test the electrode distance of a spark plug, the target signal is taken at the beginning of a test period and in an operating state which is at least approximately the same as the current operating state at the time of the test.
  • the invention initially assumes that the condition of the ignition system is determined almost exclusively by the spark plugs which are subject to wear, since further wear parts are not present, in particular in the case of contactless ignition systems.
  • Known test methods for spark plugs infer the state of the spark plugs from the level of the ignition voltage on the secondary side (cf. DE-OS 23 22 834, DE-OS 26 08 707 and US Pat. No. 2,430,069).
  • the invention offers two major advantages. On the one hand, the test is carried out using the primary-side ignition voltage signal, the amplitudes of which are far lower than the secondary-side signal.
  • the test is carried out without intervention in the ignition system, while in the known spark plug test methods the secondary-side ignition voltage signal is supplied externally with the aid of separate adapters.
  • the invention thus makes it possible to continuously determine the wear of the spark plugs without intervention in the ignition system and to provide a relative statement about the condition of the spark plugs at any time during operation.
  • This operating state can be, for example, the overrun operation of the internal combustion engine. If it is an internal combustion engine with a so-called overrun cut-off, ie the interruption of the fuel supply in overrun mode, the influence of the Mixture on the test result completely excluded.
  • the switch available for the detection of overrun operation for example on the throttle valve, can also be used to initiate the test method. But even without overrun cut-off, overrun mode offers the possibility to carry out the test of the spark plug under approximately the same and constant test conditions. For this purpose, it is then still necessary to take into account the speed or the speed curve of the internal combustion engine.
  • the test period over which the entire test of the spark plug should extend can be chosen freely and with any starting point. In contrast, there are advantages to starting the test period with the start-up of the spark plug. This ensures that the spark plug at the beginning of the test period in, Trim g are and the changes of the primary side Zündschreibssignals are based on the total wear of the spark plug.
  • the start of the test period can be determined arbitrarily or with the aid of a signal triggered automatically when maintenance is carried out.
  • the prerequisite for the latter is that it involves maintenance in which the spark plugs are routinely replaced.
  • Diagrams A and B shown in FIG. 1 show the primary-side ignition voltage signal of a spark plug with a normal (A) and too large (B) electrode spacing. It can clearly be seen that the two ignition voltage signals differ essentially in three points. For one thing, the greater the electrode spacing, the greater the maximum amplitude (a). Secondly, the larger the electrode spacing, the greater the internal voltage (b), and thirdly, the shorter the electrode spacing, the longer the burning time (d).
  • the two diagrams A and B show the course of the ignition voltage signal in at least approximately the same operating state of the internal combustion engine, in the present case in overrun mode with the fuel supply switched off and the same number of engine revolutions.
  • the reason for the different course of the primary-side ignition voltage signals is a correspondingly different course of the secondary-side ignition voltage signals, not shown. These, in turn, are caused by the different electrical conditions for the ignition spark between the two electrodes of the spark plug, which are dependent on the electrode spacing, during the burning period d.
  • the circuit shown in FIG. 2 serves to determine the ignition voltage amplitude a.
  • the ignition signal is taken between an induction transmitter (not shown) and an ignition coil (also not shown) (so-called terminal 1 signal) and fed via an amplitude attenuator 1 to a low-pass filter 2, a peak value meter 3 and a pulse shaper 4.
  • the output signal of the peak value meter 3 is digitized in an analog / digital converter 5 and stored in a measurement value memory 6. This is triggered by the signal of an induction transmitter, not shown, with a pulse shaper 7 connected downstream.
  • the digital values of ignition voltage amplitudes for the spark plug to be tested are stored in the measured value memory 6 and averaged.
  • the speed is detected with the aid of the speed-proportional signals supplied by the induction transmitter to the pulse shaper.
  • the constant operating state is obtained with the aid of this rotational speed and an additional signal from a switch which is arranged, for example, on the throttle valve of the internal combustion engine and which is actuated when the throttle valve is closed.
  • the ignition voltage amplitude is thus determined for this operating state with the aid of averaging.
  • the test method includes determining the ignition voltage amplitude in the manner described when the spark plug is started up. For this purpose, a signal routinely triggered when maintenance is carried out is used. With this setpoint value obtained with the aid of the spark plug to be tested, the respective ignition voltage amplitudes are now determined in the same way, for example when the same operating conditions of the internal combustion engine are present, and compared with the setpoint value in a downstream processing stage 8. If the current value of the ignition voltage amplitude deviates from this target value by a predetermined amount, a warning signal is generated in a known manner or the degree of wear of the spark plug is indicated as part of a service interval display.

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)
EP84113722A 1983-11-19 1984-11-14 Méthode de test pour système d'allumage de moteur à combustion interne Expired - Lifetime EP0142817B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833341880 DE3341880A1 (de) 1983-11-19 1983-11-19 Pruefverfahren fuer zuendanlagen von brennkraftmaschinen in kraftfahrzeugen
DE3341880 1983-11-19

Publications (3)

Publication Number Publication Date
EP0142817A2 true EP0142817A2 (fr) 1985-05-29
EP0142817A3 EP0142817A3 (en) 1986-03-26
EP0142817B1 EP0142817B1 (fr) 1991-01-16

Family

ID=6214752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113722A Expired - Lifetime EP0142817B1 (fr) 1983-11-19 1984-11-14 Méthode de test pour système d'allumage de moteur à combustion interne

Country Status (4)

Country Link
US (1) US4684896A (fr)
EP (1) EP0142817B1 (fr)
JP (1) JPS60119377A (fr)
DE (2) DE3341880A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989009333A1 (fr) * 1988-04-02 1989-10-05 Robert Bosch Gmbh Observation de la combustion dans un moteur a combustion interne a allumage par etincelle
WO1992003655A1 (fr) * 1990-08-24 1992-03-05 Robert Bosch Gmbh Systeme d'allumage pour moteurs a combustion interne
FR2680836A1 (fr) * 1991-08-29 1993-03-05 Renault Procede et dispositif de surveillance de l'ecartement des electrodes d'une bougie.
FR2687255A1 (fr) * 1992-02-07 1993-08-13 Renault Procede d'estimation de l'etat d'usure d'une bougie.
US5370099A (en) * 1990-08-24 1994-12-06 Robert Bosch Gmbh Ignition system for internal combustion engines
EP0654604A1 (fr) * 1993-11-22 1995-05-24 Magneti Marelli France Procédé et dispositif d'allumage à bobine avec des décharges additionnelles pour diagnostics
EP1835172A3 (fr) * 2006-03-15 2014-12-17 Robert Bosch Gmbh Appareil et méthode de détermination de l'usure d'une bougie dans un moteur thermique

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825167A (en) * 1987-11-02 1989-04-25 General Motors Corporation Spark plug testing under dynamic load
US5155437A (en) * 1990-07-26 1992-10-13 Unison Industries Limited Partnership Diagnostic device for gas turbine ignition system
US5523691A (en) * 1990-07-26 1996-06-04 Unison Industries Limited Partnership Diagnostic device for gas turbine ignition system
JP2678986B2 (ja) * 1991-03-07 1997-11-19 本田技研工業株式会社 内燃機関の失火検出装置
US5283527A (en) * 1991-06-28 1994-02-01 Ford Motor Company Methods and apparatus for detecting short circuited secondary coil winding via monitoring primary coil winding
US5194813A (en) * 1991-09-16 1993-03-16 Hannah Kenneth H Spark ignition analyzer
US5208540A (en) * 1992-02-28 1993-05-04 Coltec Industries Inc. Ignition performance monitor and monitoring method for capacitive discharge ignition systems
WO1995028563A1 (fr) * 1994-04-19 1995-10-26 Gas Research Institute Appareil et procede de mesure de tension disruptive
WO1996015366A1 (fr) * 1994-11-14 1996-05-23 Kayser William M Appareil d'analyse pour moteurs equipes de bougies d'allumage
US5635841A (en) * 1995-03-31 1997-06-03 Innova Electronic Corporation Electronic ignition control module test system
US5606118A (en) * 1995-09-05 1997-02-25 Ford Motor Company System and method for detecting misfire in an internal combustion engine
US5997360A (en) * 1997-10-14 1999-12-07 Gen-Kuong; Fernando Francisco Aircraft equipment configuration identification interface
US6044700A (en) * 1997-10-14 2000-04-04 Endevco Corporation Aircraft equipment configuration identification interface guide
US6006156A (en) * 1997-12-11 1999-12-21 Cummins Engine Company, Inc. Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine
US6408242B1 (en) 1997-12-11 2002-06-18 Cummins, Inc. Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine
DE19756336C1 (de) * 1997-12-18 1999-04-01 Daimler Benz Ag Verfahren und Vorrichtung zur Prüfung der Kompression sowie der Zündanlage einer Verbrennungskraftmaschine
US6392315B1 (en) * 1999-04-05 2002-05-21 Delphi Technologies, Inc. Compensation circuit for an automotive ignition sensing system
US7376497B2 (en) * 2001-09-21 2008-05-20 Innova Electronics Corporation Use of automotive diagnostics console to diagnose vehicle
KR20030025731A (ko) * 2001-09-24 2003-03-29 현대자동차주식회사 엔진에 장착된 상태의 스파크 플러그 간극 점검 방법
US20050182535A1 (en) * 2004-02-17 2005-08-18 David Huang Device and method for identifying a specific communication protocol used in an on-board diagnostic tool
US8024083B2 (en) * 2005-06-30 2011-09-20 Chenn Ieon C Cellphone based vehicle diagnostic system
US8068951B2 (en) * 2005-06-24 2011-11-29 Chen Ieon C Vehicle diagnostic system
US20060293811A1 (en) * 2005-06-24 2006-12-28 Keith Andreasen Automotive data logger
US8019503B2 (en) * 2007-06-28 2011-09-13 Innova Electronics Corp Automotive diagnostic and remedial process
US7603293B2 (en) * 2005-06-24 2009-10-13 Innova Electronics Corporation Method of providing diagnostic information in connection with the sale of pre-owned vehicles
US9117319B2 (en) * 2005-06-30 2015-08-25 Innova Electronics, Inc. Handheld automotive diagnostic tool with VIN decoder and communication system
US20070143000A1 (en) * 2005-12-16 2007-06-21 Trevor Scott Bryant Wireless Spark Energy Indicator
US9026400B2 (en) 2007-06-28 2015-05-05 Innova Electonics, Inc. Diagnostic process for home electronic devices
US8370018B2 (en) * 2007-06-28 2013-02-05 Innova Electronics, Inc. Automotive diagnostic process
CA2702158C (fr) * 2007-10-09 2013-12-17 Flextronics Automotive Inc. Sonde de capteur de bougie d'allumage utilisant une carte de circuit imprime en tant qu'antenne
US8306687B2 (en) * 2009-11-10 2012-11-06 Innova Electronics, Inc. Method of diagnosing a vehicle having diagnostic data
DE102011005651A1 (de) * 2011-03-16 2012-09-20 Man Diesel & Turbo Se Verfahren zur Bestimmung des Verschleißes von Elektroden einer Zündkerze und Vorrichtungen hierzu
CN103541852A (zh) * 2013-10-08 2014-01-29 成都泛华航空仪表电器有限公司 全自动化点火器试验系统
DE102016218662B4 (de) 2016-09-28 2022-01-13 Bayerische Motoren Werke Aktiengesellschaft Testen einer elektrischen Fahrzeug-Komponente
US11574510B2 (en) 2020-03-30 2023-02-07 Innova Electronics Corporation Multi-functional automotive diagnostic tablet with interchangeable function-specific cartridges
US11651628B2 (en) 2020-04-20 2023-05-16 Innova Electronics Corporation Router for vehicle diagnostic system
US11967189B2 (en) 2020-04-20 2024-04-23 Innova Electronics Corporation Router for communicating vehicle data to a vehicle resource

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430069A (en) * 1944-12-02 1947-11-04 Gilbert & Barker Mfg Co Apparatus for testing spark plugs
DE2322834A1 (de) * 1973-05-07 1974-11-28 Nicholas George Festos Tragbares pruefgeraet fuer zuendkerzen
DE2343895A1 (de) * 1973-08-31 1975-03-13 Bosch Gmbh Robert Verfahren und einrichtung zur ueberpruefung der zuendanlage von brennkraftmaschinen
DE2608707A1 (de) * 1976-03-03 1977-09-08 Daimler Benz Ag Verfahren und messgeraet zur messung des abstands zweier elektroden
US4053823A (en) * 1976-04-22 1977-10-11 Adamian Michael R Ignition arc monitor circuit
DE2752244A1 (de) * 1977-11-23 1979-06-07 Baum Elektrophysik Gmbh Verfahren und vorrichtung zum pruefen elektrischer zuendanlagen von otto-motoren
DE2759155C2 (de) * 1977-12-31 1986-04-03 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zur Erfassung der Funkendauer in Zündeinrichtungen für Brennkraftmaschinen
DE2811573A1 (de) * 1978-03-17 1979-09-27 Bosch Gmbh Robert Einrichtung zur ueberpruefung einer zuendanlage fuer brennkraftmaschinen
JPS56115866A (en) * 1980-02-15 1981-09-11 Nippon Denso Co Ltd Detector of abnormality in ignition signal for internal combustion engine
US4394742A (en) * 1980-10-31 1983-07-19 Fmc Corporation Engine generated waveform analyzer
DE3151415C2 (de) * 1981-12-24 1986-11-20 Daimler-Benz Ag, 7000 Stuttgart Verfahren zur Messung des Elektrodenabstandes der Zündkerzen eines Kraftfahrzeuges und Gerät zur Durchführung des Verfahrens
US4449100A (en) * 1982-04-05 1984-05-15 Ford Motor Company Ignition system tester
JPS5920866A (ja) * 1982-07-27 1984-02-02 Toyota Central Res & Dev Lab Inc 多気筒エンジンの点火プラグ検査装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989009333A1 (fr) * 1988-04-02 1989-10-05 Robert Bosch Gmbh Observation de la combustion dans un moteur a combustion interne a allumage par etincelle
WO1992003655A1 (fr) * 1990-08-24 1992-03-05 Robert Bosch Gmbh Systeme d'allumage pour moteurs a combustion interne
US5370099A (en) * 1990-08-24 1994-12-06 Robert Bosch Gmbh Ignition system for internal combustion engines
FR2680836A1 (fr) * 1991-08-29 1993-03-05 Renault Procede et dispositif de surveillance de l'ecartement des electrodes d'une bougie.
FR2687255A1 (fr) * 1992-02-07 1993-08-13 Renault Procede d'estimation de l'etat d'usure d'une bougie.
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.
EP1835172A3 (fr) * 2006-03-15 2014-12-17 Robert Bosch Gmbh Appareil et méthode de détermination de l'usure d'une bougie dans un moteur thermique

Also Published As

Publication number Publication date
JPS60119377A (ja) 1985-06-26
DE3341880A1 (de) 1985-05-30
EP0142817A3 (en) 1986-03-26
US4684896A (en) 1987-08-04
EP0142817B1 (fr) 1991-01-16
DE3341880C2 (fr) 1987-10-15
DE3483952D1 (de) 1991-02-21

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