Booston Posted September 4, 2019 Report Share Posted September 4, 2019 Can anyone think of a protection strategy for being out of target AFR by a percentage greater than ? i.e if clamp at 8% then at 10%+ fuel cut or other Tia Quote Link to comment Share on other sites More sharing options...
Booston Posted September 9, 2019 Author Report Share Posted September 9, 2019 No takers ? Seems like a basic function to have ? An oem ecu would at least put CEL on if adjustment was beyond normal! ? Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted September 10, 2019 Report Share Posted September 10, 2019 Yes there is a function based on AFR. Quote Link to comment Share on other sites More sharing options...
Booston Posted November 10, 2019 Author Report Share Posted November 10, 2019 Any detailed info would greatly be appreciated. Had some very worrying lean condition without any way of knowing until logs checked !!!!!! Quote Link to comment Share on other sites More sharing options...
Stevieturbo Posted November 11, 2019 Report Share Posted November 11, 2019 Then set a lean AFR rpm limit as long as your wideband is reliable and works. Booston 1 Quote Link to comment Share on other sites More sharing options...
Rossobianconero Posted November 12, 2019 Report Share Posted November 12, 2019 On 11/10/2019 at 4:05 PM, Booston said: Any detailed info would greatly be appreciated. Had some very worrying lean condition without any way of knowing until logs checked !!!! On 11/10/2019 at 4:05 PM, Booston said: Any detailed info would greatly be appreciated. Had some very worrying lean condition without any way of knowing until logs checked !!!!!! I ussually set a gp limits with x axis being lambda and Y axis load, that way you decide how much boost you accept at a define afr. If you have a worrying lean spot and you are trusting in the closeloop doing all the work, you should spend some times tuning your Fuel map with the CL off Quote Link to comment Share on other sites More sharing options...
Booston Posted April 1, 2020 Author Report Share Posted April 1, 2020 We tuned whole map and all was good with CLL either not having to make any corrections to any cell or very very little. Something went bad with fuel pump and CLL tried to correct as it should but either reached it Max correction. So in that scenario a safety set at say 5% or more correction doing something else, pref rpm limit plus CEL. to update mapper did find away to protect as above excessive correction equal rpm limit plus cel Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted April 1, 2020 Report Share Posted April 1, 2020 A basic setup but you get the idea. Toliski and Booston 2 Quote Link to comment Share on other sites More sharing options...
Booston Posted April 1, 2020 Author Report Share Posted April 1, 2020 Fab I did wonder what table would be Quote Link to comment Share on other sites More sharing options...
Booston Posted April 13, 2020 Author Report Share Posted April 13, 2020 Is there no way to monitor correction level and if it’s excessive have an action ? Even a CEL would at least give an indication something is on the move. You get this on stock ecu’s Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted April 13, 2020 Report Share Posted April 13, 2020 You could buy a gauge/dash or even install a tablet that way you could monitor every thing. I take the new X series with the math function would be able to trigger an output based on correction level. Booston 1 Quote Link to comment Share on other sites More sharing options...
Booston Posted April 13, 2020 Author Report Share Posted April 13, 2020 Thanks Ducie, I don’t want to view what’s going on ( mostly race car ) just want automation and safety. X could be on the cards then Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted April 14, 2020 Report Share Posted April 14, 2020 Run a fuel pressure sensor that way you can use differential fuel pressure as a limit. That will monitor if your fuel pumps have died or on way out. Then another limit based on afr like the above pic. I cant see why that wont be good enough. Both will be quicker to respond that looking and reacting to a dash fault light. Quote Link to comment Share on other sites More sharing options...
Rossobianconero Posted April 14, 2020 Report Share Posted April 14, 2020 22 hours ago, Booston said: Thanks Ducie, I don’t want to view what’s going on ( mostly race car ) just want automation and safety. X could be on the cards then I work with a lot of race cars, and usually my aproach is to leave it to the driver, I dont wont to shutdown the engine in the final corner if he is fighting for the championship, I leave that to him or her to decide, in that case the best way is a Dash, and make different alarms, he or her can decide what to do and when. In those car I just make corrections to try keep everything undercontrol if something goes wrong. If is not that series the competition then aggresive protections is a good way to save the engine. If you just need to turn on a light to warn the driver, you can use aux that under over X afr and X amount of load turn the light. Booston and AbbeyMS 1 1 Quote Link to comment Share on other sites More sharing options...
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