|
|
No answer, Buly. I have no experience with the EM2. However, the two
problems you have may or may not be related. I do not see why the
EM2 problem would keep the EC2 from sending out the injector simulation
pulse train. You are placing the mode switch in mode 1 (with pumps off) and
pushing the program control button to simulate the injectors - I mean Mode 8
works for your ignition so I don't see what mode 1 is not working for the
injectors (I know, you'd really like to know as well).
I personally believe that you have tried about everything (at least once)
that I can think of to suggest. The only thing I can think to recommend is
that you ( or an electronic friend) need to connect an oscilloscope to the
injector triggering pins of your EC2 - if the proper pulse wave form is
there then the EC2 is OK (but you already know that isn't the problem
because with Bob's installed it doesn't still doesn't work) - then you
connect the oscilloscope to the other end of the injector wiring (at the
injectors) and see what the injector pulses are indeed there and are of the
proper shape. If the pulses are OK at the EC2 end and Not OK at the injector
end then it must be the shielded wiring.
Here is one more though. If you use a volt ohm meter to measure 12 volts at
your injectors there is one more thing that could cause a problem like you
are experiencing. If there is a resistance between your 12V power source through your injectors
and your EC2, it could permit a small current to flow (sufficient
to run a volt ohm meter) without any noticeable drop. However, if your
injectors start to fire and draw a bunch of current this resistance could
cause enough voltage drop across it that your injectors would not have
enough to cause them to function. This might explain also why you can get a click by grounding one injector at a time - sufficient current/voltage to cause one to click, but trying to fire all four injectors many times a second (via the EC2) might create too much load. This is pretty far-out, but given you have tried just about everything plausible, I think you may have to start trying the less plausible.
.
I mean if Bob's and your EC2 are both functioning and the wiring is
connected to the injectors then - either the pulse train is Not getting
there (which doesn't seem likely giving your testing) OR the pulse is
arriving but distorted to the point it won't open the injectors.
Ed
----- Original Message ----- From: "Bulent Aliev" <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, May 20, 2007 2:51 PM
Subject: [FlyRotary] Re: Frustration update
Ed, let's assume that was the problem. Why is the blink'n NOP blinking?
Once again couple of years ago it happen and I remember it was something
minor. But finding it, almost ate a month of my time.
Anybody have a good deal on a carburator :)
Buly
On May 20, 2007, at 12:25 PM, Ed Anderson wrote:
Found this chart, Buly. If I interpret it correctly and you have more
than 30 feet length of shielded cable, it would appear to distort the
injector pulse sufficient for it to need reshaping. However, I presume
you don't have more than a few feet - so this may not be the problem -
it really depends a lot of the capacitance to the particular shield
cable you used.
Ed
Justified signal processing
Waveform Maximum Reshaping
transmission required
Sine wave < 5 ft. not required
TTL Square wave
(single ended) < 30 ft. > 30 ft.
TTL Square wave
(complementary) < 50 ft. > 50 ft.
TTL Square wave same as TTL complementary
(open collector) except greater noise immunity
Line Driver
(differential) > 50 ft. not required
Amplified analog
(complementary) < 30 ft. > 30 ft.
Pulse < 20 ft. not feasible
If signal cables are long, the signal can require reshaping to
ensure its reliability. Assuming quality cable is used, listed here are
rough breakpoints at which additional processing is required.
----- Original Message ----- From: "Bulent Aliev"
<atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, May 18, 2007 6:32 AM
Subject: [FlyRotary] Re: Frustration update
My coils are the LS-1 Bob, but the coils tested fine. Just the
injectors are dead when the whole thing is plugged?
Buly
On May 17, 2007, at 11:45 PM, Bob White wrote:
Hi Buly,
I'm really disappointed. I was hoping it would fire right up. BTY,
do you have LS-1 coils. That's what my unit is programmed for.
Bob W.
On Thu, 17 May 2007 21:41:49 -0400
Bulent Aliev <atlasyts@bellsouth.net> wrote:
Today I received Bob White's EC and that helped clear Tracy's update
from being the problem. Did ring all the pins between the EC plug and
control panel. Everything checked OK. Did ring all the pins to the
crank angle sensor. All OK. Checked all ground pins for a 10th time,
all OK. Headed home in disgust. I'll keep pocking until I stumble on
something?
Buly
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/
flyrotary/List.html
-- N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://www.roblinphoto.com/ shop/
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/
flyrotary/List.html
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/
flyrotary/List.html
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/
flyrotary/List.html
--
Homepage: http://www.flyrotary.com/
Archive and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html
|
|