Peak temp of combustion

[nacelp]

> Perfect topic for flame war !!!

Now if you had mistated something maybe flames, but I didn't see anything
like that here.
I've heard the EPA is no longer allowing the lean cruise modes, for special
conditions.
Also, recall a blurb the GM would get a hefty fine if they say anymore of
it.
Grumpy
   The EPA gets a copy of all the source code, documentation for all cars
manufactured in the US, and imported here.  To bad the manufacturers are
following GM lead in igfnore the mandate of disclosing the source code for
all this stuff.  Been going on for like 20 years now.  I wonder how much
that has cost them.


> The highest combustion temps occur at Lambda 1.1
>
> This also coincides with peak NOx development as NOx is
> temperature dependent.
>
> Unfortunately for petrol it is also the highest thermal eff.
>
> This gives rise to the expression " lean cruise " a trick the
> manufacturers use to artificially raise the fuel economy numbers.
>
> The drive cycle test do not use a speed higher than 92 km/hr so the
> script kiddies at the ECU mapping centers write little algs such as
>
> is vehicle speed 95 km/hr +
> is the engine temp over 65 deg/C
> has the throttle movt. been less than 5% per 10 sec
> is the rate of accel less than 5%
> goto lean burn table
>
> Reason for the table is simple. The A/F ratio is beyond the range of
> that technological slight of hand the oxygen " switch ".
>
> Phil
>
>
>
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