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Old 09-02-2017, 06:56 PM   #141 (permalink)
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Hi t vago thanks
As for (Cv) by the research I did on the internet I also did not see many references, it seems that much information is based on assumptions, which may not be the correct, but for lack of better, is what we have for guidance.
I think the calculation you use for (Cv) is this help with simplified cDA/cRR formula
When I asked it to be able to by a description in the project I presented above, the other two values easily found the description, the Cv although suspected I was not sure.

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Old 09-05-2017, 07:06 AM   #142 (permalink)
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Hi t vago
I found this pdf and I think it has very useful information for the coastdown.
https://avt.inl.gov/sites/default/fi...v/htp001r2.pdf

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Old 09-05-2017, 06:25 PM   #143 (permalink)
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After a close look at the pdf what you see is the "viscous drag" is not part of the test process.
On another website, another factor, which I do not know if it will be of interest, is "Driveline and powertrain mechanical resistance"
https://hyundaimpginfo.com/assets/co...Fact_Sheet.pdf

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Old 10-17-2017, 01:36 AM   #144 (permalink)
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Removed bug causing drag race function to prematurely cancel. Enhanced drag race function to allow it to auto-trigger whenever the vehicle is stopped, and then select the best 0-60 recorded time. Auto-triggering can be turned off via stored parameter.

Re-examined skybolt's JSON code, and came up with function to decode the acceleration test flag status. Also replaced sections dependent on cycle0() with main timer command flag that triggers every 1.6 seconds. Considering whether to replace min() and max() functions with equivalent SWEET64 bytecode.

Went through code and converted more sections to namespace.

You now enter the menu by short-pressing the center button. LCD backlight brightness has been moved to long-pressing the center button. CPU % utilization now uses long-press of both right and left buttons at the same time.

Working on simplifying trip variable load/save, and adding manual trip entry. Also working on adding matrix math to enable coastdown testing and automatic fuel parameter determination (gallons/uSec and fuel injector latency in microseconds).
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Old 10-17-2017, 02:20 PM   #145 (permalink)
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Hi t vago
Good job, when are we going to have this new version to test.

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Old 10-23-2017, 02:05 AM   #146 (permalink)
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Not sure when, I've got to track down a bug in the keypress recognition section. It currently overrides button definitions that it's not supposed to, and that's kind of annoying to encounter when you're trying to test stuff that is keypress-related.

Looks like I got the parameter editing section pretty much separated from the settings section, so I should be able to figure out how to use the parameter editor to manually enter tank trip variables. It could not do that before, because it was pretty much tied to reading and writing only to EEPROM.
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Old 10-23-2017, 03:57 PM   #147 (permalink)
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Hi t vago
I'm sorry it was not my intention to rush your brilliant work, I just thought it was already functional and so I asked it to be available.
But take time that is necessary, without haste.

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