Detecting faults in dual function ignition coils for internal combustion engines, involves comparing sum of detected rough running values for all cylinders with threshold value

The method involves computing rough running values caused by misfiring in the cylinders for each cylinder, adding the values for all cylinders, comparing the sum with a threshold value and using the threshold being exceeded as an indicator of a defective dual function ignition coil. A fault is indic...

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Bibliographic Details
Main Author ANGERMAIER, ANTON
Format Patent
LanguageEnglish
German
Published 28.06.2001
Edition7
Subjects
BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES
LIGHTING
MECHANICAL ENGINEERING
TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
WEAPONS
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Summary:The method involves computing rough running values caused by misfiring in the cylinders for each cylinder, adding the values for all cylinders, comparing the sum with a threshold value and using the threshold being exceeded as an indicator of a defective dual function ignition coil. A fault is indicated when the threshold is exceeded for the first time or a defined number of times. Die Laufunruhewerte (LU) derjenigen Zylinder, die an derselben Doppelfunken-Zündspule (DZ1; DZ2) angeschlossen sind und die die durch Verbrennungsaussetzer in den Zylindern (Zyl1-Zyl4) hervorgerufenen Drehzahlschwankungen der Kurbelwelle beinhalten, werden addiert und der Summenwert (LU_M) dieser Laufunruhewerte mit einem Schwellenwert (SW) verglichen. Bei Überschreiten des Schwellenwertes (SW) wird auf eine defekte Doppelfunken-Zündspule (DZ1; DZ2) geschlossen und ein Fehlermeldesignal ausgegeben.
Bibliography:Application Number: DE1999157731