|
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?
Disclaimer
The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient,
you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful.
This email has been scanned for viruses and malware, and may have been automatically archived by
Mimecast Ltd, an innovator in Software as a Service (SaaS) for business. Providing a
safer and more useful place for your human generated data. Specializing in; Security, archiving and compliance. To find out more
Click Here.
|