Convert oxy sensor to a digital signal?
I was wondering what would happen if the oxygen sensor signal were used soley as an input to a voltage switch. This voltage switch would be adjustable, and the output of this circuit would be either 0.1V or 0.9V, with nothing in between. The switching point would be adjustable in 10mV steps.
This would allow us to choose a closed loop AFR with reasonable accuracy and without using a well calibrated guess-o-matic (as the EFIE seems to use) as a tuning device.
The only problem I see is that if the computer actually checks to see if a sinewave exists in closed loop mode, but all the ealier (EECV and earlier) just seem to have a voltage target, and that's it.