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Originally Posted by dcb
Sorry, what I meant was that if you get X number of injector pulses in a second, then you probably have an indication of RPM, at least for most vehicles. Or if you know the time between pulses (not the pulse width).
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I see. We observe the injector pulse duty cycle is basically in inverse proportion to RPM.
The exception is...
A. in fuel-cut mode: We can't see the duty cycle but the engine is spinning during such as downhill coasting. Maybe, it'll be more than 1.5 sec that we won't see any injector pulse activity, then the LCD will be off ???
B. all injectors ON: During engine start up and acceleration, the ECU sends short ON signal to all injectors.
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A method static variable will retain its value between calls.
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Thank you!
I think I was taught by a wrong C language instructor.
Yoshi