[Wbo2] Using the Bosch WB sensor with L1H1 circuit board

[bcroe at juno.com]

Sorry I didn't get back on this.  The error from stoich is the 
right way to go.  If you really want to be right (at numbers far 
from stoich), you should make the error calculation on the 
fuel/air ratio, which is the reciprical of the air/fuel ratio.  

Bruce Roe

29 Nov 2005 "Steve Ravet" <Steve.Ravet at arm.com> writes:

> > -----Original Message-----
> > From: wbo2-bounces at diy-efi.org 
> > [mailto:wbo2-bounces at diy-efi.org] On Behalf Of Marteney, Steve
> > Nov 29, 2005 7:42 AM
> > To: Ron Vinsant; Andrew Robertson
> > Cc: wbo2 at diy-efi.org
> > Subject: RE: [Wbo2] Using the Bosch WB sensor with L1H1 circuit 
> board
> > 
> > I was really hoping someone would reply to this email, but no 
> > one did, so I'll ask some follow-up questions.  Your 
> > percentage errors are calculated directly on AFR.  One 
> > example you gave is 13.2 - 15% = 11.3.  However, is the error 
> > really in AFR, or is it in Lambda, current/voltage?
> 
> Garfield elaborated on this one time after I posted a 
> similar statement.  Percentage errors are measured 
> from stoich, not 0, since the meter has a natural null 
> at stoich.  To take your example of 15.1 minus 15%:
> 
> 15.1-14.7=0.4
> 
> 0.4-15%=.34
> 
> 14.7+.34=15.04
> 
> --steve