WPSLPGExhaust Gas Oxygen (EGO) sensor Information

[Greg Hermann]

>I am gonna put my flame suit on for a sec here.  Don't take that as me
>being a "guru" though.
>
>I was always taught that there is a small useable area on the curve of a
>standard EGO (besides the steep "switch") and it is rich of stoich.
>Mostly because there is still some slope on the rich side (but not much,
>and it looks like you'd have big problems with any offset errors when 80
>millivolts covers lambda .99 to lambda .80). That being said, I do not
>have practical experience with exploring that area of a standard
>EGO/HEGO.  I also don't think this is done in practice, at least in production.

There is a slope to the curve on the rich side of stoich--trouble is, said
slope is _VERY_ sensitive to back-pressure, sensor temp, and possibly some
other factors. It may tell you something, but there is not much way to
figure out WHAT it is telling you, in any sort of a precision, repeatable
manner, other than RICH!!!

Greg
>
>
>-Seth
>
>
>
>
>ext-peter.betts at nokia.com wrote:
>>
>> Ah! So you think the sensor works over a larger range and just because the
>> ECU doesn't use it, it doesn't stop me using it as a diagnostic aid with my
>> AFR Meter?
>>
>> When I say larger range I guess it gets pretty non-linear either side of
>> stoch'  ? But I'm hoping you can still make sense of the sensor output
>> either side of it.
>>
>> Guru needed to reply I think.
>>
>> Pete
>>
>> > -----Original Message-----
>> > From: EXT Christian J. Knudstrup
>> > [mailto:Christian.J.Knudstrup at esc1.net]
>> > Sent: Wednesday, August 02, 2000 1:58 PM
>> > To: diy_efi at diy-efi.org
>> > Subject: Re: WPSLPGExhaust Gas Oxygen (EGO) sensor Information
>> >
>> >
>> > Someone correct me if I am wrong but the Sensor works at all
>> > ranges it is
>> > just that at WOT you are mostly running rich and want to be
>> > running rich so
>> > the computer is told to ignore the O2 values while at WOT.
>> >
>> > If I have misunderstood this point please someone correct me.
>> >
>> > Christian
>> ----------------------------------------------------------------------------
>> To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
>> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>----------------------------------------------------------------------------
>To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
>in the body of a message (not the subject) to majordomo at lists.diy-efi.org


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org