[Diy_efi] EMS inputs/output?

[Richard M]

Bruce,
You are always banging on about 'DIY' and the importance of doing things for
ourselves etc.... so give the guy some encouragement.. I did my own ECM some
years ago, and compared to a 'oem' it was much simpler and usefully so IMO.
The oem's have to include loads of stuff that is not used to directly
control the particular engine it is fitted to, they have to cover a
multitude of issues relating to emmissions, diagnostics and manufacturing
spread, which are not so important in a system intended for a much narrower
useage.
So Alex, just go ahead and give it a go, and good luck - you will learn a
lot that way..
Regards
Rich

----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Thursday, July 25, 2002 1:46 PM
Subject: Re: [Diy_efi] EMS inputs/output?


>
> Ya right,
> I like things like *I could* yada yada.
> I still say a well thought out, less complex project would be better.
> Just read thru some oem code, and see what's involved in an oem QUALITY
type
> set up.
> Bruce
>
>
> ----- Original Message -----
> From: "Kent Martin" <kentmartin at froggy.com.au>
> To: <diy_efi at diy-efi.org>
> Sent: Thursday, July 25, 2002 12:58 AM
> Subject: Re: [Diy_efi] EMS inputs/output?
>
>
> > Don't listen to Bruce,
> > Your a fourth year student and I did one in my third year for a project.
> > I could write the code for one in about 3 weeks full time. Your a
student
> > so this should be much trouble.
> > Kent.
> > ----- Original Message -----
> > From: "Bruce" <nacelp at bright.net>
> > To: <diy_efi at diy-efi.org>
> > Sent: Thursday, July 25, 2002 10:47 AM
> > Subject: Re: [Diy_efi] EMS inputs/output?
> >
> >
> > >
> > > Design and build one?.
> > > It would be primitive at best, there's alot to this.
> > > I'd suggest you investigate the Megasquirst ecm, build one of them,
and
> > just
> > > get it correctly calibrated for a particular car, that would be a
years
> > > work.  Or take an existing ecm, and analyse/disect it.
> > > Bruce
> > >
> > > ----- Original Message -----
> > > From: alex averbuch
> > > Subject: [Diy_efi] EMS inputs/output?
> > > I'm on my final year of an Engineering degree and as part of my course
I
> > > have to do a research paper.  Engine Management Systems have always
> > > interested me so I'm going to try building one, only problem is I know
> > very
> > > little about the input and output signals that an EMS requires.
> > > Listed below are all the inputs/outputs that I KNOW are used.  If
anyone
> > > knows of anymore then could you please tell me and include what the
> > function
> > > of the input/output is.
> > > INPUTS
> > >   Water Temp: Used for cold start.
> > >   Manifold Air Pressure: Used to measure Engine Load.
> > >   RPM
> > >   LAMBDA:  Measures Air/Fuel mixtures in exhaust.
> > >   Throttle Position: Used to control boost or for Fueling
compensations.
> > >   Ping Sensor: Detects detonation.
> > >   Crank Angle: Used a trigger for firing each spark plug? NOT TOO SURE
> > ABOUT
> > > THIS
> > > OUTPUTS
> > >   Injector Timing: PWM output? NOT TOO SURE ABOUT THIS EITHER
> > >   Ignition: I have know Idea what this output signal is or where it is
> > sent.
> > > :(
> > >
> > >
> > >
> > > MSN Photos is the easiest way to share and print your photos: Click
Here
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> > >
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> >
> >
> >
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