O2 sensor idea

[Greg Hermann]

>On Mon, 19 Apr 1999, Greg Hermann wrote:
>
>> >That is why I want to get a well calibrated wide band unit and setup a
>> >pic or something similar to give the kind of results the stock
>> >computer wants, and give mv readings that actually mean something.
>>
>> As I said earlier, Roger, it MAY (not sure yet) be possible to bias a wide
>> band O2 sensor with a constant ion pumping current so that it crosses at
>> any A/F ratio you want, in the same way that a standard EGO or HEGO sensor
>> does--Changing the bias say for cruise or WOT, and leaving an oem ecm in
>> closed loop would allow a programmable selection of A/F ratios  for
>> different operating conditions. (The bias adjustment is what would fool the
>> ecu, the sensor would act like normal EGO sensor at 14.7:1.) The bias and
>> its changes would need to be dealt with outside of the oem ecu.
>>
>> Regards, Greg
>
>The idea is to bias the wide band O2 normally so that it reads the
>range of AFR that you want.  Then put a pic in front that inputs the
>wideband O2 sensor voltage,/other info and converts that via a table
>(non linear table to make the wb act like a normal O2 sensor).
>
>I guess the other idea is to adjust the bias to read the AFR you want,
>and then let the computer run in closed loop mode (even at wot), just
>with the modified AFR ratio required for max power.

And also with a modified AFR, as desired , at light loads, for best cruise
economy??

Greg
>
>			Roger