[Efi332] Re: Where can I find info about 4 layer board

[Steve Ravet]

I overheard an ME acquaintance saying jerk is the derivative of
acceleration but it didn't mean anything to me.  What is jerk detection,
and what does detecting it do for you?
 
--steve


________________________________

	From: efi332-bounces at diy-efi.org
[mailto:efi332-bounces at diy-efi.org] On Behalf Of Darrin Garrett
	Sent: Wednesday, April 19, 2006 11:57 PM
	To: efi332 at diy-efi.org
	Subject: [Efi332] Re: Where can I find info about 4 layer board
	
	
	
	Well the division that created this code is no more and the same
fate for the product, but the company still exists.  I think any info
regarding peripheral's register addresses and what not, would be OK to
release, also none of the algorithms that were developed were not
patented.
	 
	Just a quick overview of this GMWPX software product: It was
used in a heavy duty spark ignited diesel conversion application meant
for busses and large stationary engines that ran on natural gas,
hydrogen, or propane, up to 8 cylinders.  The code handled drive by wire
throttle in order to increase efficiency by always limiting any pumping
losses due to throttle angle.  It was mostly meant for boosted lean burn
A/F ratios but the code would work at any ratio, rich or lean, as long
as the engine could handle it.  It had waist gate control, sequential
spark control for individual cylinder timing and dwell of each
individual coil, (Delphi coils on each plug), jerk detection (which did
work very well), Drive by wire throttle, a single PWM controlled non
linear fuel control valve for the gaseous fuel, fuel mass measurement,
speed density A/F control ( map, temp,...), the knock control hardware
was there and the pezio electric device's input could be detected but
the code for this was not finished and was stubbed out beyond this.  It
had table driven feed forward PIDs for just about all of its  feed back
control algorithms including control of a lean burn ego sensor with
external hardware/driver O2 pumps, which I do not have or its associated
documents, and heuristic learning.  All this from a ECU meant for light
duty V8s.  
	 

	
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