Hehehe....wonder when they're going to use real processors in our PCM's
(with at least dual FPU's). And i'm NOT talking about Intel/AMD
either...they're too slow on the I/O.
I would LOVE to get my hands on the actual tables and formulas that our
PCM's use...we've got some engineers at work that are also "hot rodders" and
this is what they do all day long (math, calculations, chip design, etc.).
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
Subject: Re: DML: Re: MAP Info
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
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