[Bulk] Re: [Diy_efi] Donegan ECU

[Steven P. Donegan]

Well, the electronics are actually fairly easy - the 4 O2 sensor inputs
I put in the current design will handle narrow or wide band injectors.
Outputs to control tranny/other stuff - interesting and perhaps if a
'real' application arises (ie explain exactly what you want/need) I'll
add it. Not hard to add things to my design in hardware and software is
C so I expect folks will pitch in when the time comes.

And thank you very much for the feedback!

On Thu, 2007-01-04 at 20:29 -0500, Jay Rabe wrote:
> On 1/4/07, Steven P. Donegan <donegan at donegan.org> wrote:
> >
> > I have not yet added OBDII to my project - it appears that I have to if
> > it is going to be plug compatable for my Z28 so that will likely
> > happen.
> > My intent for this project is a universal EFI/ECM/PCM/MSD box -
> > something useful on any engine up to 8 cylinders. If it lacks any inputs
> > or outputs tell me and I'll add them :-)
> 
> 
> A few things...
> 
> If you build this ecu only for a returnless fuel system, this limits what
> fuel pumps you can use.    http://fuel-pumps.net/fuelpumpsfaq7.html#9
> When writing the software i assume you'd give the option of a normal relay
> powered style fuel pump.
> 
> So all this below would be in my dream standalone computer.  This is mostly
> way over the top.
> 
> One thing i've always wanted to see implimented is something to make fueling
> a variable vane (variable ar) turbo engine "easy" to control fuel.  I would
> think an extra pressure transducer to monitor exhaust pressure before it
> goes into the turbo would be very helpful to give a new compensation for MAP
> systems.   Even MAF systems could probably benefit from this on the ignition
> side of things.  Yeah these are not common, but i think having the ability
> to fuel them properly will help their popularity and they are being used by
> a few automakers.   This should help them become more common soon.  Also
> some kind of circuitry to control the variable actuator.  Maybe a
> potentiometer to monitor this?  Or, maybe just the actuator potentiometer is
> enough for the fuel/ign compensation?
> 
> Another thing would be variable cam(s) control.  I've been dreaming of a
> worm gear "solenoid" controled cam timing adjuster for timing belt engines.
> It would probably need a potentiometer in it to know where it is.  This
> could be very beneficial if done properly. I know, it would be tough to make
> an adjuster blah, blah, it would be cool tho...  I know you can tell where
> the timing is from the crank signal vs. the cam signal, but i like
> potentiometers.   Grab a meter and see what position its by its voltage
> instead of an oscilloscope and all that fun.
> 
> If you could make it OBD-II capable, you just might be building the next
> step in standalone computers.  96 and newer cars who have to pass OBD port
> only emissions could actually pass emissions.  It would probably never get
> EPA certified if they knew it was going to be tunable.   OBD II port
> replicators are illegal...  Maybe leak some software after the release???
> 
> A self learn circuit for fuel/ignition would be cool.  Id imagine it would
> be mostly coding tho...
> 
> Wideband capability?  Not easy, but makes tuning very nice...
> 
> Boost control?  ...gear variable?
> 
> Traction control input or traction control?  Maybe like a rev limiter...
> Maybe an adjustable slip allowance...
> 
> Launch control?
> 
> Full throttle shift?
> 
> Software/hardware to allow a secondary set of injectors?
> 
> Anti lag?  there is misfire and "jet engine" style
> 
> I wish i knew more about coding and electronics...
> 
> Jay
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