Jerry Hey wrote:
[Windows Computer] Arrived yesterday and is working well.
> I put a zip drive on it and
another one on the Mac so that I can transfer files back and forth. I
downloaded two free programs sketchup and abword and moved them to the
pc no problem. I can't believe how clumsy Windows is but it does not
matter once I get where I want to go.
I downloaded the PicAxe PDFs and printed them out. Have not had a
chance to go further. I will be laid up in early January (knee surgery)
so I hope to move forward on this project then.
Jerry
Great Jerry. USB flash drives also work well for transferring files
on my Linux system.
I am just looking at the PicAXE manual and PicAXE BASIC manual pdf's
and trying to decide which command to use as a hardware interrupt.
Looks like the SETINT command is it. See the attached files.
Then you do the main program that reads the MAP or
mass air flow sensor and sets the fuel pump PWM based
on the mixture look up table. You also have to read the leaning
pot on the instrument panel. Then your done and you go back
to the back ground loop.
This happens when the ign trigger pulse comes in every time the rotor turns
once. Assuming we are using one EFI system per rotor. I think the PWM on
the fuel pump is a simpler and cheaper system than one on each injector.
Of course there are no injectors or pressure regulators to buy. This
system keeps looking cheaper and better.
BTW I am going to use the Stock Mazda 2nd gen mass airflow sensor pictured
as it is very cheap and readily available as a lot of people
have them lying around. I have two. People get one with most engines.
The other subtle advantage is you don't need a MAP and a hand vacuum
pump to test the system on the bench. You just move the spring loaded trap door
by hand. Perry Mick has been flying with one for years. Not really big
enough for a P-port but some US 250 HP or above V8 mass air flow sensor
can be added later.
I just had an idea that tiny steel or copper tubing could be used
to go into the mouth of the runners and can be as long as
you want. You could inject the fuel anywhere along the length
of the runner right up to the P-port. I'll do a 3D shortly.
No tig welding injector holders to the runners required.
My purely mechanical low pressure fuel injection is only waiting on
the needles to be ground. Should be done by the first of the year
so that will be tested on the dyno first. Then I'll test this
system if it works on the bench.
I think there is a market for both.
Paul Lamar ...No rotor no motor.
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