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Re: italian-cars-digest V7 #45
In a message dated 98-02-09 17:32:05 EST, you write:
<< Despite differences in mounting and heated/unheated configuration, all
O2 sensors are basically the same. The oxygen sensor is a wonderful
thing, but it has an almost purely "on-off" output. That is, it can tell
the computer "too lean" or "too rich", but it can't say "just right". So
you get 0.1 V at "lean" OR 0.9 V at "rich" (or is it vice versa?), but
never, say, 0.45 V ("just right").
It actually works the same way as the thermostat in your house - the
furnace can only be either "on" or "off", but the thermostat can still
control the temperature in the room by deciding when "on" and "off"
Close but not exactly. the O2 sensor is not on off pattern but a sin wave
pattern.The trick is to reduce the amplitude of the sin wave in order to stop
the constant rise in fall.
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