[Diy_efi] WBO2 and AFR

[Fehn, Ron G]

if the ethanol runs leaner would not the NB02 read lean and add more
fuel attempting to maintain stoich and thus WB02 would show toggle over
14.7 ?   stoich for 10% ethanol is 14.13.  stuff i read. 

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
On Behalf Of Adam Wade
Sent: Wednesday, July 06, 2005 2:17 PM
To: diy_efi at diy-efi.org
Subject: RE: [Diy_efi] WBO2 and AFR


--- "Fehn, Ron G" <RFEHN at amfam.com> wrote:

> OK.  how about a 10% ethanol blend gas vs the good
> non ethanol stuff?  does running ethanol blend
> result in a richer or leaner reading on WB
> and why?

For the same injector pulse width, I'd say that the O2
sensor would read leaner when running with an ethanol
blend, as ethanol brings an extra oxygen atom to the
party.

This almost makes sense when you think about why
ethanol is added to gasoline; vehicles operating in
open-loop (whether NBO2 controlled or simply
carbureted, etc.) will run somewhat leaner using 10%
eth blend, in theory leading to reduced greenhouse
gases (but likely an increase in NOx, assuming the
vehicle is in a good state of tune and maintenance).

| 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 |

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi
__________________________________________________________________
If you do not want to receive future unsolicited commercial email 
advertisements or promotions from American Family you may opt-out
by visiting the following website:
<https://www3.dncsolution.com/SSL/DNESolution/OptOutCode/OptOut.aspx?el=5 >
Note: After opting-out, you may receive emails that you have
specifically requested from American Family.  If you are a current
American Family customer, you may still receive transactional emails
regarding your existing policies or accounts with American Family.
American Family Mutual Insurance Company and its affiliates utilize
the PossibleNow DNESolution to administer this email opt-out process.