E4OD Shifting
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Google RS422. That is the waveform of the + and - RPM. It isn't a sign wave. It's a 5 volt digital signal on each line, out of phase with each other.
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All the gasoline E4OD controllers use an engine torque table to compute desired TV pressure. I haven't looked in that detail at diesel code, but I would expect it does the same; TV still needs controlling. In your case, the existing torque table will likely have values bigger than what your gas engine can produce, so you'll just have hard shifts.
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From: Delaware
All the gasoline E4OD controllers use an engine torque table to compute desired TV pressure. I haven't looked in that detail at diesel code, but I would expect it does the same; TV still needs controlling. In your case, the existing torque table will likely have values bigger than what your gas engine can produce, so you'll just have hard shifts.
It's a seat-of-the-pants correction, but it provides acceptable results.
I plan to write my own code and run it on a Micro-Controller to control the E4OD. I'll use an Alpha-N calculation to determine the Load and shift the trans accordingly. A high Load will indicate a lower gear within a certain RPM range. Low Load will indicate a higher gear above a certain RPM range. Initially it will be a fairly simple control algorothm. Bells and Whistles can follow.
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The tables use Load or Percent Load vs RPM. Percent Load is equivalent to the Volumetric Efficiency of the motor. The Diesel table will look much the same as a gasoline motor table, but the RPM for a given Load will be lower. I correct for that by using a correction factor in the Tach-to-Pump RPM conversion.
It's a seat-of-the-pants correction, but it provides acceptable results.
It's a seat-of-the-pants correction, but it provides acceptable results.
I plan to write my own code and run it on a Micro-Controller to control the E4OD. I'll use an Alpha-N calculation to determine the Load and shift the trans accordingly. A high Load will indicate a lower gear within a certain RPM range. Low Load will indicate a higher gear above a certain RPM range. Initially it will be a fairly simple control algorothm. Bells and Whistles can follow.
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From: Delaware
That's true as far as it goes; however the table values will likely be too high.
You seem to be making fairly informed choices here. I'm wondering what's steering you away from modifying the binary code in the existing controller, possibly using existing available tuning software and hardware?
You seem to be making fairly informed choices here. I'm wondering what's steering you away from modifying the binary code in the existing controller, possibly using existing available tuning software and hardware?
The Binary code for the Trans Controller for the Diesel has not been hacked at this time, and would require a Tweecer($$) or other device to load the new binary.
I think that I could market my device at a much lower price than a Baumann unit Although it will not have all the bells and whistles, as long as my device works well, it should sell.
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