[Diy_efi] WBO2 and AFR

[WopOnTour]

Adam
I think that is what Gary said isn't it? Leaner than actual WHEN LEAN (AFR
14.7:1 or leaner) as you would be measuring O2 based on partial pressure
under turbo generated back pressure. Which makes total sense to me. But what
I am having a hard time getting my head around is RICHER than actual when
AFRs are richer than stoich. Still reading. Need more testing or validation
from GAS.
Regards
WopOnTour

----- Original Message ----- 
From: "Adam Wade" <espresso_doppio at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, July 07, 2005 2:05 PM
Subject: Re: [Diy_efi] WBO2 and AFR


> --- gary <gas- at charter.net> wrote:
>
>> EXPECT, it to read richer than actual, when the AFR
>> used, is richer than stoich, and leaner than actual,
>> when the AFR used, is leaner than stoich
>
> I believe this to be untrue.  As O2 sensors are
> primarily sensitive to partial pressure of O2 (see Mr.
> Bowling's excellent exposition on this topic from
> today), they will read leaner than "actual" when
> exhaust back-pressure is increased greatly.  If
> back-pressure is exceedingly high (higher than you've
> calibrated for), you should NEVER get a reading that
> shows richer than actual, if my understanding is complete.
>
> | 82 Honda CX500 Turbo (Cassandra)  90 Kwak Zephyr 550 (Daphne) |
> | "It was like an emergency ward after a great catastrophe; it  |
> |   didn't matter what race or class the victims belonged to.   |
> |  They were all given the same miracle drug, which was coffee. |
> |   The catastrophe in this case, of course, was that the sun   |
> |     had come up again."                    -Kurt Vonnegut     |
> | M/C Fuel Inj. Hndbk. @ Amazon.com -  http://tinyurl.com/6o3ze |
>
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