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Would you consider his controller
flight-worthy? I've had his website bookmarked for years, but
couldn't convince myself on the wisdom of flying a product that,
when I 1st discovered it, had only been installed on his bike. I
still love the idea; we'd never have vapor related fuel issues
again.
Bummer that the Speeduino doesn't have the software & hardware
to control the pump. You'd think they would do it, since just
about every car includes pump control in the engine controller
these days.
Charlie
On 6/27/2020 10:47 AM, Steven W. Boese SBoese@uwyo.edu wrote:
Charlie,
The pump/filter unit is in a small header tank similar to the
Vikingaircraftengines system. The controller is not part of the
Speeduino system, but a separate unit from
madhu.com.
Steve Boese
Oooh...did
I miss (or forget) a memo about the turbine
pump/controller?
In-tank
pump, or did you rig something external with positive
delivery to its input?
Is the
pump controller part of the Speeduino hardware/software,
or a separate controller?
Thanks,
Charlie
Bobby,
I'm
using only the MAP sensor on the Speeduino board.
The fuel pressure sensor that is used with the
turbine type pump and pump controller is MAP
compensated.
Steve Boese
Thanks Steve. That clears up a few things. I
came across posts on the SpeedUino forum
discussing Table Blending had been added as a
feature so I assumed two or more individual tables
would be necessary. TPS, MAP, Flex Fuel sensor
etc. Are you using two MAP sensors for altitude
fuel compensation?
Bobby
Sent from my iPad
Bobby,
With my Renesis dual wheel trigger setup,
tooth #1 is the first tooth on the 12
tooth (crank) wheel after the signal from
single tooth (cam) wheel. The crank and
cam signals are actually generated by a
single wheel on the E-shaft. The angle of
this tooth #1 relative to TDC can be
specified in the setup.
The TPS input code has been changed
to add or subtract from the pulse width
after all other calculations are made in
order have it act as a manual mixture
control.
I also changed the VE table so the
cells all are 100 initially rather than
reflecting the MAP percent of the sea
level pressure. The MAP percentage is
now applied before the VE table values
are applied. For example, the original
table value would have been 50 if MAP
was half of sea level. This makes the
VE table act like the EC2 mixture
correction table. Changing the values
in the VE table to values less or more
than 100 delivers less or more fuel
compared to what would be delivered as
calculated from the displacement, MAP,
intake air temp, and desired AFR.
I'm not sure what table 1 and table
2 would refer to in the Speeduino -
MSDruid cell phone app system I'm
using.
Steve Boese
◆
This message was sent from a
non-UWYO address. Please
exercise caution when clicking
links or opening attachments
from external sources.
Another
question Steve. When you
switched the code for TPS
are you using it in blended
tables where table 2 is
Alpha–N, TPS and table 1 is
MAP based? Or are you
running pure Alpha–N? It
appears a second MAP sensor
can be wired in externally
and left open to the
atmosphere for altitude fuel
compensation.
Thanks,
Bobby
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net]
Sent: Friday,
June 26, 2020 12:33 AM
To: Rotary motors
in aircraft
Subject:
[FlyRotary] Re:
SpeedUino
I
changed the code in the
Speediuno to use the TPS
input to give manual
mixture control from a
potentiometer and it works
fine, both with a
Speedysim board and with
the actual running engine.
◆ This message was sent
from a non-UWYO address.
Please exercise caution
when clicking links or
opening attachments from
external sources.
Yes,
my idea would be an
opamp confgured as a
summing amplifier,
with the wideband on
one input and biasing
voltage on the other.
The
TPS sounds simpler, if
that will work.
On
Jun 25, 2020, at 8:45
PM, "Steven W. Boese
SBoese@uwyo.edu"
<flyrotary@lancaironline.net>
wrote:
The
O2 sensor outputs a
voltage but very
little current.
That would make it
difficult to bias it
in a predictable
way. Biasing a
buffered output such
as a wideband O2
unit output would
probably work.
Steve Boese
Any
reason (other
than the need to
run 'closed
loop' all the
time) to not use
a bias voltage
added/subtracted
from the O2
sensor output,
to control
mixture?
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