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If I remember my documentation, the injectors can power the Engine
Controller. Specifically, the EC manual calls out for a switch to
disconnect the injectors from the power supply, so that the EC doesn't
remain powered and run the battery down.
. If the Engine Controller is powered by this circuit, and the engine
controller is connected to the monitor, its possible that there is some
bleed current running to the EM as well. I am not sure specifically if
there is supposed to be a path for current to bleed over or loop around
like that, but it appears in your case that it does.
Sounds like we (chris and I) will need to come up with an "engine
master switch" that will power the EC, EM, Injectors, Fuel Pump and
Radiator Fan(s) on a common bus... in adition to a "master" and an
"avionics master"
Dave
Bulent Aliev wrote:
Hi Ed,
I discovered last night that there is a mystery related to my primary
injector switch: with only the master on, I turn the primary injector
switch on, and the EM display comes on with 6.5V "low voltage"
reading. I have to find out how the injector cirquit can feed power to
the EM?
Any ideas?
Buly
On Oct 11, 2005, at 4:47 PM, Ed Anderson wrote:
Buly, Something you might try is setting the
staging manifold pressure point at a higher manifold pressure. That
way your 550c primary should be the only ones on at low and even
medium rpms and since the Ec2 appears to work fine with 550s out of
the box, this might help. Since you have already gone the mode 3
route, this is the only thing I can think of.
I believe the problem is that upon initial start, the EC2 sees
ambient pressure in the manifold (30"Hg) and thinks the engine is wide
open throttle, it checks the fuel map for the amount of fuel to inject
for MAP = 30"Hg and injects fuel (a lot!) accordingly. Normally,
this is not a problem as the engine immediately starts and sucks the
manifold pressure down to the nominal 12-14" Hg (for idle) and the
fuel injected is adjust accordingly AND the secondary are turned off
(until the manifold pressure again rises to the staging point), but
with your big injectors having all four dump fuel before the engine is
started and running is probably contributing to the problem.
Do you have switches on your injectors and have you tried starting
with the secondary injectors turned off??
I presume you don't have the cold start turned on (accidentally or
otherwise -shorted).
I presume you have programmed a lean mixture for start up region .
Ed A
----- Original Message ----- From: "Bulent Aliev"
<atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, October 11, 2005 4:15 PM
Subject: [FlyRotary] injector size
Hi Guys,
For the last few months I have been struggling with engine flooding
on start up. Looking at the EC2 manual, it tells me that it comes
pre-set for "standard" Mazda injectors. I checked the injector charts
and most of the Mazdas have 460 or 550 CC injectors for primary and
secondary. My engine (Cosmo 13B) comes with 550 cc primary and 850 cc
secondary.
I did some Mode3 adjustment on the EC-2 and looks like it's a bit
better, but the trailing plugs get wet if it does not start right
away?
Any Ideas?
Buly
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Homepage: http://www.flyrotary.com/
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Bulent Aliev
www.enginegearonline.com
Email: bulent@enginegearonline.com
Ph. 954 557-1019
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