Bernd,
RE: PCM wonders...
Math is high overhead in a PCM, especially floating point math. Slows things
way down! The ventilators I used to design (hardware, not software...)
used many many look up tables that were then "ratioed" by the response of
other sensors (such as Atmospheric pressure, temperature etc.) to deliver an
accurate mass flow rate. Pencile necks such as myself would do the math (or
our computers would) to determine how much ratioing we needed to squeek into
the delivery specifications.... We played a lot of "games" to get what we
wanted, some made immediate sense, some were arcane and never well
understood other than they worked...Fudge factors were OK until about '89
when the FDA made us explain a lot of them and we couldnt...We had to make
the hardware better to get rid of the funky software (my personal
philosophy at any rate, cant let software guys get all the glory) No FDA
for car manufacturer's software though...lots of funkyness I'm sure.
bruce
----- Original Message -----
From: <bernd@texas.net>
To: <dakota-truck@buffnet.net>
Sent: Thursday, November 16, 2000 4:54 AM
Subject: Re: DML: Re: MAP Info
>
> From what I understand on the PCM, it has static maps that are modified
> according to the various sensor inputs. So, one could say, that
indirectly,
> the PCM is controlled by the sensors. Alter the sensors input/output and
you
> get different results. (Hehehe...proved that one by forgetting to hook up
a
> sensor...didn't run right.) ;)
>
>
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