[Bulk] Re: [Diy_efi] Donegan ECU

Mon Jan 8 14:03:20 UTC 2007

Hi,

I can also help with programming in C.  Happy to pitch in if needed.

Andrew.

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
On Behalf Of TomC
Sent: Friday, 5 January 2007 5:04 PM
To: diy_efi at diy-efi.org
Subject: RE: [Bulk] Re: [Diy_efi] Donegan ECU

Let me know when some programming is required. I've programmed in C for
the last 20 years.

Tom

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Steven P. Donegan
Sent: Thursday, January 04, 2007 7:34 PM
To: diy_efi at diy-efi.org
Subject: Re: [Bulk] Re: [Diy_efi] Donegan ECU

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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