Another injector question
Steve Ruse
rusej at letu.edu
Thu Jan 25 06:06:54 GMT 2001
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Hi, my name is Steve Ruse, and I am much in the same position as James. =
I am working on a fuel injection system for a Formula SAE car at =
LeTourneau University. I have a lot to learn, and this list looks like a =
great place to do that.=20
The engine is a 600cc four cyl from a Honda CBR. I also own a '94 Z28 =
and do custom EEPROM tuning on it, that is basically where I "cut my =
teeth" on EFI.
I am interested in the answer to James's last question, and I have also =
have some questions of my own.
First, what are some good sources for injectors? We have some for =
testing, but I don't think they are the ones that we will want to use in =
the end.=20
What is the best way to test the flow rate of our injectors? Is there =
something better than just timing how long it takes them to move a given =
amount of fuel?
Also, how can we account for the open/close delays of our injectors? =
Could that be accurately determined accurately by varying the duty cycle =
and seeing how the flow rate changes from when the injectors are at 100% =
duty cycle? Is there an easy way to keep our fuel pressure constant =
while performing this test? We were just going to try using an =
automotive fuel pressure regulator.
Thanks!
Steve Ruse
-----Original Message-----
From: james.drysdale at utoronto.ca <james.drysdale at utoronto.ca>
To: Fuel Inj Mailing List <diy_efi at diy-efi.org>
Date: Wednesday, January 24, 2001 2:35 PM
Subject: Another injector question: flow rates
Thanks for the responses to my previous question! (Even the ones from =
those=20
guys at Queens :)
Here's another: What's the difference between static and dynamic flow =
rates for=20
fuel injectors?
The spec sheet for my injectors lists both, but which should I use to =
calculate=20
the pulse width? (I'm thinking dynamic, but what's the difference?)
Thanks again,
james
"God help us. We're in the hands of engineers."
- from Jurassic Park
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<DIV><FONT size=3D2>Hi, my name is Steve Ruse, and I am much in the same =
position=20
as James. I am working on a fuel injection system for a Formula SAE car =
at=20
LeTourneau University. I have a lot to learn, and this list looks like a =
great=20
place to do that. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>The engine is a 600cc four cyl from a Honda CBR. I =
also own a=20
'94 Z28 and do custom EEPROM tuning on it, that is basically where I =
"cut=20
my teeth" on EFI.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I am interested in the answer to James's last =
question, and I=20
have also have some questions of my own.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>First, what are some good sources for injectors? We =
have some=20
for testing, but I don't think they are the ones that we will want to =
use in the=20
end. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>What is the best way to test the flow rate of our =
injectors?=20
Is there something better than just timing how long it takes them to =
move a=20
given amount of fuel?</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Also, how can we account for the open/close delays =
of our=20
injectors? Could that be accurately determined accurately by varying the =
duty=20
cycle and seeing how the flow rate changes from when the injectors are =
at 100%=20
duty cycle? </FONT><FONT size=3D2>Is there an easy way to keep our fuel =
pressure=20
constant while performing this test? We were just going to try using an=20
automotive fuel pressure regulator.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Thanks!</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT><FONT size=3D2>Steve =
Ruse</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>-----Original Message-----<BR>From: <A=20
href=3D"mailto:james.drysdale at utoronto.ca">james.drysdale at utoronto.ca</A>=
<<A=20
href=3D"mailto:james.drysdale at utoronto.ca">james.drysdale at utoronto.ca</A>=
><BR>To:=20
Fuel Inj Mailing List <<A=20
href=3D"mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A>><BR>Date: =
Wednesday, January 24, 2001 2:35 PM<BR>Subject: Another injector =
question: flow=20
rates<BR><BR></DIV></FONT><BR>Thanks for the responses to my previous =
question!=20
(Even the ones from those <BR>guys at Queens :)<BR><BR>Here's another: =
What's=20
the difference between static and dynamic flow rates for <BR>fuel=20
injectors?<BR><BR>The spec sheet for my injectors lists both, but which =
should I=20
use to calculate <BR>the pulse width? (I'm thinking dynamic, but what's =
the=20
difference?)<BR><BR><BR>Thanks again,<BR><BR>james<BR><BR><BR>"God =
help us.=20
We're in the hands of engineers."<BR>- from Jurassic=20
Park<BR>-----------------------------------------------------------------=
-----------<BR>To=20
unsubscribe from diy_efi, send "unsubscribe diy_efi" (without =
the=20
quotes)<BR>in the body of a message (not the subject) to <A=20
href=3D"mailto:majordomo at lists.diy-efi.org">majordomo at lists.diy-efi.org</=
A><BR></BODY></HTML>
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