Quote:
Originally Posted by instarx
Those steel-tubing fuel lines expand!? I suppose that's possible, but it sure wouldn't be by much.
Oh - I read the reference. The sensors measure vibration of the fuel line, not expansion. That seems more doable. You'd have a lot of work to do since it counts vibration events - not length of the events. Its response time appears to be 0.5 seconds, which is way slower than you would need. Still, you might be able to use some sort of piezo-electric sensor with different electronics. You could also use a microphone to detect the sound of the injector firing (which in its own way is detecting vibration). This is getting so complicated it might be easier to just buy a new car with OBDII.
|
Actually vibration is not a good way to describe it. The transducer really does pick up very small pulses of the steel line expanding when the injection even occurs. You are talking about alot of pressure here and it happens pretty fast. If it was vibration then what vibration? because the whole engine has tons of various harmonics and vibrations.
With these older engines the easiest way is to use two zemco like flow meteres and subtract the return line pulse from the supply pulses, take the leftover pulses and feed those into the mpguino. DCB could, I am sure modify the program to count pulses and associate fuel use to each pulse similar to the way we do now. Shoot with my peak and hold gasser injectors thats basically all the mpguino is doing anyway.