Re: Tuning in Open Loop for Newby

[rr <RRauscher@nni.com>]

WEG1192@aol.com wrote:

> RRauscher@nni.com writes:
>
> << Once close, go to closed-loop (O2 feedback), set the blm min/max
>  to 128, and use the int to tune.
>   >>
> Ahh, now I understand. Leave closed loop enable temp alone and restrict BLM
> movement to zero. Then use integrator fluctuation to see how far off mixture
> is from 14.7. Probably a dumb question but does the integrator itself affect
> the injector pulsewidth or does the BLM only affect pulsewidth or both?

Both the int and blm change the fueling, the blm twice as much as the int. Then
of course there is the proportional term (ack, gonna' hate me now).

>
>
> I would guess that the short amount of time that the engine runs in open loop
> makes tuning in that area a non-issue except for drastic engine mods where
> tuning is required to get it to run period?
>
> One more question. Will the heater in a heated O2 sensor keep it at operating
> temp without the engine running?  If you needed to tune in open loop with a
> cold engine or warm engine, could you preheat the O2 sensor and begin tuning
> right away with a hot O2 sensor as an aid?
>

I've turned them on to get into closed loop sooner, but doesn't do much
good until the engines warmed up, 'les you have a WB.

BobR.


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