[Diy_efi] EMS inputs/output?
huw scourfield
huw.scourfield at lineone.net
Thu Jul 25 00:10:22 GMT 2002
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Alex, I did just what you're doing, my advice would be to keep it =
simple, forget lambda - go open loop, if using manifold pressure, forget =
throttle position. Forget "ping" sensor too, this is really involved.The =
injector timing will be in the 1-8 mS region, no real need to use Pwm =
outputs, but I suppose it could be used. As for ign, I would suggest =
using a remote module (bosch), as these take care of dwell interally.
Start small, if you have time later, then add the goodies.
Huw=20
----- Original Message -----=20
From: alex averbuch=20
To: diy_efi at diy-efi.org=20
Sent: Wednesday, July 24, 2002 2:36 AM
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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<DIV><FONT face=3DArial size=3D2>Alex, I did just what you're doing, my =
advice would=20
be to keep it simple, forget lambda - go open loop, if using manifold =
pressure,=20
forget throttle position. Forget "ping" sensor too, this is really =
involved.The=20
injector timing will be in the 1-8 mS region, no real need to use Pwm =
outputs,=20
but I suppose it could be used. As for ign, I would suggest using a =
remote=20
module (bosch), as these take care of dwell interally.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> Start small, if you =
have time=20
later, then add the goodies.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> =
Huw</FONT> </DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Daverchoob at hotmail.com =
href=3D"mailto:averchoob at hotmail.com">alex=20
averbuch</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Ddiy_efi at diy-efi.org=20
href=3D"mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, July 24, 2002 =
2:36=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [Diy_efi] EMS=20
inputs/output?</DIV>
<DIV><BR></DIV>
<DIV>
<DIV>I'm on my final year of an Engineering degree and as part of =
my=20
course I have to do a research paper. Engine Management Systems =
have=20
always interested me so I'm going to try building one, only problem is =
I know=20
very little about the input and output signals that an EMS =
requires.</DIV>
<DIV>Listed below are all the inputs/outputs that I KNOW are=20
used. If anyone knows of anymore then could you please tell =
me and=20
include what the function of the input/output is.</DIV>
<DIV>INPUTS</DIV>
<DIV> Water Temp: Used for cold start.</DIV>
<DIV> Manifold Air Pressure: Used to measure Engine Load.</DIV>
<DIV> RPM</DIV>
<DIV> LAMBDA: Measures Air/Fuel mixtures in exhaust.</DIV>
<DIV> Throttle Position: Used to control boost or for Fueling=20
compensations.</DIV>
<DIV> Ping Sensor: Detects detonation.</DIV>
<DIV> Crank Angle: Used a trigger for firing each spark plug? =
NOT TOO=20
SURE ABOUT THIS</DIV>
<DIV>OUTPUTS</DIV>
<DIV> Injector Timing: PWM output? NOT TOO SURE ABOUT THIS =
EITHER</DIV>
<DIV> Ignition: I have know Idea what this output signal is or =
where it=20
is sent. :(</DIV></DIV><BR clear=3Dall>
<HR>
MSN Photos is the easiest way to share and print your photos: <A=20
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Here</A><BR>_______________________________________________ Diy_efi =
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