[Diy_efi] EMS inputs/output?

[Bruce]

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.
:(



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