1227747 Diacom output?

[Ward]

Bruce:
If you know enough to lock out functions why would you want any kind of a
simulator ?

The best use of a simulator is hacking, and I can't imagine what the big
deal is about the o2 sensor is, its realy a no brainer. 

To sim the o2 a clock at about 10 - 20 hz switching the o2 sig between about
400 mv to 800 mv will do the job just fine. 

The ECM o2 ckt's intigrate the switching for n time period, add up the
values and divide by n. A little more filtering and you have the short time
fuel trim. (Integrater)

If you want to see the intigrater change move the bias on the ckt described
above.

Ward



On Mon, 19 Apr 1999 15:50:06 -0400, Bruce Plecan wrote:

> 
> 
> At one time I was really pushing for having an engine simulator, and
thought
> that would be the neatest thing.  But, along they way having played with
the
> bench for some months now, I haven't really needed it.
>   Being able to run things precisely, at one set of variables, allows you
to
> change one thing at a time, and see what happens.  If you looking for an
> address for something this is exactly what ya want.
>   The One Thing Needed is a programable O2 feed back devise.  Where
> something looks at the PW and relays back the change to ecm thru the O2.
>   Disabling  codes 13-44-45 on some of the ecms or locking out closed
loop,
> can get around this.
> Bruce
>        Doc was sooo Happy,  at the laundramat, he keep hitting the payoff
> for the one dollar slot machine.  I didn't have the heart to tell him why
he
> kept getting 4 quarters.
> 
> > I'm starting to 'Bench Test' the 7747 ecm, and was wondering
> > if anyone had a Diacom output file of a car running a 7747.
> 
> 





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