EP1388869B1 - Circuit de test pour bobine d'allumage et procédé pour tester une bobine d'allumage - Google Patents

Circuit de test pour bobine d'allumage et procédé pour tester une bobine d'allumage Download PDF

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Publication number
EP1388869B1
EP1388869B1 EP03017711A EP03017711A EP1388869B1 EP 1388869 B1 EP1388869 B1 EP 1388869B1 EP 03017711 A EP03017711 A EP 03017711A EP 03017711 A EP03017711 A EP 03017711A EP 1388869 B1 EP1388869 B1 EP 1388869B1
Authority
EP
European Patent Office
Prior art keywords
ignition coil
contact
switching element
test circuit
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.)
Expired - Lifetime
Application number
EP03017711A
Other languages
German (de)
English (en)
Other versions
EP1388869A3 (fr
EP1388869A2 (fr
Inventor
Detlef Klemmer
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.)
ThyssenKrupp Krause GmbH
Original Assignee
ThyssenKrupp Krause 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
Priority claimed from DE10239114A external-priority patent/DE10239114A1/de
Application filed by ThyssenKrupp Krause GmbH filed Critical ThyssenKrupp Krause GmbH
Publication of EP1388869A2 publication Critical patent/EP1388869A2/fr
Publication of EP1388869A3 publication Critical patent/EP1388869A3/fr
Application granted granted Critical
Publication of EP1388869B1 publication Critical patent/EP1388869B1/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
    • 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
    • F02P11/00—Safety means for electric spark ignition, not otherwise provided for
    • F02P11/06—Indicating unsafe conditions
    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
    • F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines

Definitions

  • the invention relates to a test circuit for an ignition coil according to the preamble of claim 1. It further relates to a method for testing such an ignition coil with this test circuit.
  • Ignition coils for internal combustion engines are installed prior to installation of the internal combustion engine in a vehicle, e.g. a passenger car, tested in the state installed in the internal combustion engine.
  • the testing process is automated and should be carried out as far as possible without human intervention.
  • due to the constantly increasing cycle times in the production of vehicles a correspondingly fast test is required.
  • Ignition coils have a primary and a secondary inductance in a conventional manner.
  • the ignition process is triggered by means of a switching element arranged in series with the primary inductance, for example a transistor.
  • the voltage curve over the primary inductance is examined. Different approaches have been followed in the past. A direct tap of the voltage across the primary inductance was previously possible via an input of the ignition coil and a special measuring contact. If this measuring contact was not available, it was easy to create the measuring contact with discretely constructed or not encapsulated ignition coils, eg by an electrically conductive connection between Primary inductance and switching element has been contacted. Today, neither the measuring contact is available nor the circuit of the ignition coil for a corresponding Meßabgriff available, so that a direct measurement at the primary inductance is no longer possible.
  • measuring sensors were used which were suitable for detecting the electromagnetic field of the primary inductance. These measuring sensors had to be arranged in sufficient proximity to the primary inductance. This is time consuming and costly because of the complex positioning operations. Due to the design of the internal combustion engines and the arrangement of other components, such as intake manifolds, often a positioning of the measuring sensors in a sufficiently close to the primary inductance for the measurement is not possible.
  • the invention is therefore based on the object, a test circuit for testing the ignition coil while avoiding the above-mentioned disadvantages and to provide a method for testing the ignition coil by means of the test circuit.
  • test circuit with the features of claim 1.
  • This test circuit is characterized by a control element arranged between a supply voltage tap and a first input contact of the ignition coil to be tested, a control tap connected to a second input contact of the ignition coil, a reference voltage tap connected to a switching contact of the ignition coil, and a measuring arrangement arranged between the first and second input contacts out.
  • the invention is based on the recognition that the same conditions can be established for test purposes, when the switching element is permanently switched on and the ignition by means of another, external switching element - the control - is triggered.
  • the advantage of the invention is that by the connectivity of the switching element of the ignition coil with a reference voltage, a permanent switching of the switching element is effected.
  • the switching element thus does not appear for the intended measurement.
  • the voltage across the primary inductance can be tapped at the two input contacts of the ignition coil during the total time during which the switching element remains turned on under the action of the reference voltage. This ensures the observability of the electrical conditions at the primary inductance.
  • the ignition coil is then tested by means of the measuring arrangement connected in parallel with the primary inductance. After triggering the ignition element, the switching element of the ignition coil can not be used, since this must be switched through at least during the entire testing process, the control is provided as an additional switching element, which takes over the same function as before the switching element and triggers the ignition pulse.
  • control element is arranged between the supply voltage and the ignition coil and thus interrupts the electrically conductive connection to the supply voltage and thus to the electrical system of the vehicle, the quality of the measurement itself is improved, since previously unavoidable disturbing influences from the vehicle electrical system quasi "switched off" by the control.
  • the test circuit also protects the switching element, for example a transistor, which is integrated in the ignition coil, in particular a pencil ignition coil, since only a defined reference voltage is applied during the measurement. This can e.g. be specified by the manufacturer of the ignition coil. This ensures that damage to the switching element is excluded by the test.
  • the switching element for example a transistor, which is integrated in the ignition coil, in particular a pencil ignition coil. This ensures that damage to the switching element is excluded by the test.
  • the measuring arrangement comprises a voltage divider with a first and second resistor and a measuring device which is arranged parallel to one of the resistors of the voltage divider, a defined reduction of the voltage applied to the measuring device can be achieved.
  • the measuring device is thus protected from damage or a voltage range is selected in which the measuring device can be used optimally.
  • a diode for limiting the voltage is provided parallel to the voltage divider.
  • test circuit is based on simple electronic components having a sufficiently known characteristic.
  • transistors are less susceptible to interference because they are not subject to any mechanical wear.
  • the object is achieved according to the invention by the features of claim 7. It is provided that the supply voltage tap to a supply voltage and the Masseeabgriff are connected to ground potential. Next, the reference voltage tap is connected to a reference voltage and thus causes a switching of the switching element of the ignition coil. To trigger the ignition pulse, the control contact is supplied with a control signal. As a result, a switching of the control element is effected as a function of the course of the control signal, so that the supply voltage is applied to the primary inductance of the ignition coil. To test the ignition coil, the course of the voltage across the primary inductance is monitored by means of the measuring arrangement of the test circuit.
  • FIG. 1 shows an ignition coil 1 with a primary inductance 2, a secondary inductance 3, which is electromagnetically coupled thereto, and a switching element 4 in the form of a transistor.
  • the ignition coil 1, which is preferably a pencil ignition coil, comprises a first and second input contact 5, 6, a first and second output contact 7, 8 and a switching contact 9.
  • the primary inductance 2 and the switching element 4 are in series between the first and second input contact 5, 6 arranged such that the primary inductance 2, the first input contact 5 and the switching element 4, the second input contact 6 faces.
  • the switching element 4, in particular of the formation of the switching element 4 serving transistor is connected to the ignition coil 1, in particular the rod ignition coil, installed. Consequently, the switching element 4 or the transistor is part of the ignition coil 1 or pencil ignition coil, which thus represent a common component.
  • the secondary inductance 3 is arranged between the first and second output contact 7, 8.
  • the switching contact 9 is provided for driving the switching element 4.
  • the ignition coil 1 is connected at its first input contact 5 to a supply voltage and at its second input contact 6 to ground, then the applied supply voltage is always across the primary inductance 2, when the switching element 4 is turned on.
  • the switching element 4 is turned on when it is driven accordingly via the switching contact 9. If the potential at the switching contact 9 disappears, the current flow through the primary inductance 2 collapses, so that the magnetic field of the primary inductance 2 abruptly changes according to known ratios and thus a current flow in the secondary inductance 3 is induced.
  • the short-time high voltage at the secondary inductance 3 is so high that a spark is generated by means of a connected, not shown spark plug.
  • the signal at the switch contact 9 thus provides the ignition pulse.
  • a measuring contact 10 is provided on the side of the primary inductance 2 facing away from the first input contact 5, or such a measuring contact 10 has been created.
  • a measurement between the second input contact 6 and the measuring contact 10 could e.g. the course of the voltage at the primary inductance 2 is examined over time, and it is concluded that the ignition coil 1 is functional.
  • FIG. 2 shows the ignition coil 1 from FIG. 1 without the measuring contact 10.
  • the ignition coil 1 shown in FIG. 2 therefore corresponds to the ignition coils customary in the market today.
  • the ignition coil 1 is connected to the test circuit.
  • This comprises a control element 12, which is arranged between a supply voltage tap 11 and the first input contact 5 of the ignition coil 1 and has a control contact 13.
  • the test circuit Via the supply voltage tap 11, the test circuit is connected to a supply voltage 14, e.g. 12V, connected.
  • the test circuit has a mass tap 15 connected to the second input contact 6.
  • the test circuit has a reference voltage tap 17 connected to the switching contact 9.
  • the test circuit is connected to a reference voltage 18.
  • a preferred value of the reference voltage 18 is e.g. 5V, because it ensures that even with permanent control of the switching element 4 this is not damaged.
  • the test circuit has a measuring arrangement 19 arranged between the first and the second input contact 5, 6.
  • This comprises a voltage divider 20 having a first and a second resistor 21, 22 and a measuring device 23 arranged parallel to the second resistor 22.
  • the applied reference voltage 18 causes the switching element 4 is permanently switched through, so that the electrical conditions at the primary inductance of a measurement are accessible. If the control element 12 is also switched through, the applied supply voltage 14 is applied across the primary inductance 2.
  • the control element 12 is acted on the control contact 13 with an alternating, preferably periodically alternating control signal 24.
  • a signal form for the control signal 24 e.g. a square wave signal with a frequency of 54Hz proved to be advantageous.
  • the control signal 24 is generated by a frequency generator, not shown, so that e.g. the signal shape and / or the frequency of the control signal 24 are variable according to the respective requirements and needs.
  • a test circuit for testing an ignition coil 1 and a method for testing an ignition coil 1 with this test circuit.
  • a measuring point that is accessible in the case of previously used ignition coils 1 by a separate measuring contact 10 was, however, in today commercially available ignition coils 1 for a direct measurement neither spatially due to the encapsulated version of the ignition coil 1 still electrically accessible due to an intermediate switching element 4, made accessible by the fact that the switching element 4 is permanently connected by an application with a reference voltage 18 and thus between the measuring point and an accessible input contact 6 of the ignition coil 1 any significant potential difference disappears.
  • deactivated switching element 4 of the ignition coil 1 is a function of the switching element 4 acquiring control 12 upstream, which triggers the ignition pulse under the action of a control signal 24.
  • a "disturbing" internal switching element 4 is deactivated by the test circuit and, on the other hand, the functionality of the deactivated switching element is taken over by a control element 12 belonging to the test circuit.

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)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Claims (7)

  1. Circuit de contrôle pour contrôler une bobine d'amorçage (1) comprenant une inductance primaire (2), une inductance secondaire (3) couplée de manière électromagnétique avec celle-ci et un élément de commutation (4),
    - la bobine d'amorçage (1) comprenant un premier et un deuxième contact d'entrée (5, 6), un premier et un deuxième contact de sortie (7, 8) ainsi qu'un contact de commutation (9),
    - l'inductance primaire (2) et l'élément de commutation (4) étant disposés en série entre le premier et le deuxième contact d'entrée (5, 6) de telle sorte que l'inductance primaire (2) fait face au premier contact d'entrée (5) et l'élément de commutation (4) au deuxième contact d'entrée (6),
    - l'inductance secondaire (3) étant disposée entre le premier et le deuxième contact de sortie (7, 8) et
    - le contact de commutation (9) étant prévu pour commander l'élément de commutation (4)
    caractérisé par
    - un élément de commande (12) comprenant un contact de commande (13) et disposé entre une prise de tension d'alimentation (11) et le premier contact d'entrée (5),
    - une prise de masse (15) reliée avec le deuxième contact d'entrée (6),
    - une prise de tension de référence (17) reliée avec le contact de commutation (9) et
    - un arrangement de mesure (19) disposé entre le premier et le deuxième contact d'entrée (5, 6).
  2. Circuit de contrôle selon la revendication 1, caractérisé en ce que l'arrangement de mesure (19) comprend un diviseur de tension (20) muni d'une première et d'une deuxième résistance (21, 22) ainsi qu'un dispositif de mesure (23) qui est disposé en parallèle avec l'une des résistances (21, 22) du diviseur de tension (20).
  3. Circuit de contrôle selon la revendication 2, caractérisé en ce qu'une diode (25) de limitation de tension est prévue en parallèle avec le diviseur de tension (20).
  4. Circuit de contrôle selon la revendication 1 ou 2, caractérisé en ce que l'élément de commutation (4) et/ou l'élément de commande (12) sont réalisés par un transistor.
  5. Circuit de contrôle selon l'une des revendications précédentes, caractérisé en ce que la bobine d'amorçage (1) est réalisée sous la forme d'une bobine d'amorçage à tige.
  6. Circuit de contrôle selon l'une des revendications précédentes, caractérisé en ce que l'élément de commutation (4) est intégré dans la bobine d'amorçage (1), notamment dans la bobine d'amorçage à tige.
  7. Procédé pour contrôler une bobine d'amorçage (1), notamment selon le préambule de la revendication 1 avec un circuit de contrôle, de préférence selon une ou plusieurs des revendications 1 à 6, caractérisé par les étapes suivantes :
    a) la prise de tension d'alimentation (11) est reliée avec une tension d'alimentation (14),
    b) la prise de masse (15) est reliée avec le potentiel de masse (16),
    c) la prise de tension de référence (17) est reliée avec une tension de référence (18), ce qui rend passant l'élément de commutation (4),
    d) le contact de commande (13) est sollicité par un signal de commande (24) qui provoque la conduction de l'élément de commande (12) en fonction de la courbe du signal de commande (24),
    e) la courbe de tension aux bornes de l'inductance primaire (2) est déterminée et/ou surveillée.
EP03017711A 2002-08-05 2003-08-02 Circuit de test pour bobine d'allumage et procédé pour tester une bobine d'allumage Expired - Lifetime EP1388869B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10235848 2002-08-05
DE10235848 2002-08-05
DE10239114A DE10239114A1 (de) 2002-08-05 2002-08-27 Prüfschaltung für eine Zündspule und Verfahren zum Prüfen einer Zündspule
DE10239114 2002-08-27

Publications (3)

Publication Number Publication Date
EP1388869A2 EP1388869A2 (fr) 2004-02-11
EP1388869A3 EP1388869A3 (fr) 2006-04-26
EP1388869B1 true EP1388869B1 (fr) 2007-04-25

Family

ID=30444925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03017711A Expired - Lifetime EP1388869B1 (fr) 2002-08-05 2003-08-02 Circuit de test pour bobine d'allumage et procédé pour tester une bobine d'allumage

Country Status (3)

Country Link
EP (1) EP1388869B1 (fr)
AT (1) ATE360875T1 (fr)
DE (1) DE50307122D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10356448A1 (de) * 2003-12-03 2005-07-07 Volkswagen Ag Zündspulentester
CN109444548A (zh) * 2018-12-20 2019-03-08 天津斯巴克瑞汽车电子股份有限公司 一种汽车多组输出线圈自动静态测试台及实现方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3852390T2 (de) * 1988-06-03 1995-05-18 Bosch Gmbh Robert Einrichtung zur Erkennung von Zündaussetzern bei fremdgezündeten Brennkraftmaschinen.
DE4035957A1 (de) * 1990-11-09 1992-05-14 Bosch Gmbh Robert Verfahren zur funktionsueberwachung von brennkraftmaschinen
DE4039356C1 (fr) * 1990-12-10 1992-07-16 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4140147A1 (de) * 1991-12-05 1993-06-09 Robert Bosch Gmbh, 7000 Stuttgart, De Zuendanlage fuer brennkraftmaschinen

Also Published As

Publication number Publication date
DE50307122D1 (de) 2007-06-06
EP1388869A3 (fr) 2006-04-26
ATE360875T1 (de) 2007-05-15
EP1388869A2 (fr) 2004-02-11

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