Method for detecting the presence of a spark in an electronic ig

Communications: electrical – Condition responsive indicating system – Specific condition

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340659, 324380, 324388, 123479, 123630, G08B 2100, F02P 1700, F02M 5100

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active

057900396

ABSTRACT:
A method for detecting the presence of a spark in an electronic ignition system. The method consists of generating an overvoltage event and then generating a voltage signal proportional to the overvoltage event. The onset of the overvoltage event is detected by comparing the voltage signal to a starting threshold voltage and in response is provided a first signal at a high logic level. The first signal is maintained at said high logic level during the time duration of the overvoltage event. The termination of the overvoltage event is detected by comparing the voltage signal to an ending threshold voltage, which is lower than the starting threshold voltage and proportional to a supply voltage of the electronic ignition system, and in response is provided a second signal at a low logic level. The time duration of the first signal is detected and then the presence of a spark is signalled if said time duration exceeds a reference value.

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