Another injector question

[hamid gatch-karan]

Dear james,
Hi,
I have a similar problem with my ecu.
I think the injection duration and pulse width for my
injector is not correct and dos not match with it's
flow rate. 
In my ecu I have several injection from about 1100
micro second to 12000 micro second. The 1100 pointed
by 1 in my map and 12000 by 255. I have not understand
fully the meaning of injector flow rate,how could
measure it, and the map able relate numbers. so would
you please help me to find any sources about injectors
flow rate.

I think for my ecu the map number 2 should increase 1%
fuel relateve to number 1 in map. so if the related
inj. duration for map table (ie. from 1 to 255) are
not corect so we I not get a good results.

Iwould be appriciate if you can send me any
informations or addresses which can help me.

best regards,
h. gatch-karan


--- Steve Ruse <rusej at letu.edu> wrote:
> 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. 
> 
> 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. 
> 
> 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 
> guys at Queens :)
> 
> Here's another: What's the difference between static
> and dynamic flow rates for 
> fuel injectors?
> 
> The spec sheet for my injectors lists both, but
> which should I use to calculate 
> 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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