just a weekend warrior here, enjoy getting to know the how and why and will invest the time to learn. By far the most complex ecu ive messed with to date. still reading and re-reading several years worth of posts on here. At least the labeling for the tq pid's seems to have become more standardized. Thank you for the clarification on the cause of the errors and what is going on/wrong. it is slowly sinking in.
Im raising my hand in math class here for a homework check. Would always prefer to calculate the answer vs shoot from the hip if possible. I am bad at math
The patent labels the atmospheric pressure as Pa and specifies it is to be measured in inhg for use in their equation. Is your labeling for velocity simply referencing theirs? or is it needing to be converted from inhg to pascals? i have it converting to pascals in the spreadsheet
here is a quick spreadsheet, effective area from the throttle angle area lookup has not been setup, will work it out if everything else is sound.
TB angle error to Load.xlsx
if i have this right, using the ETC throttle angle error will give us the TB angle we are off by and then using the manifold vac (ETC model) we have our x and y lookup on the effective area table in the TB model. From this we arrive at a known effective area error for a given angle/vac. plug this into the aforementioned mass flow equation and we get the mass flow error further converted to a load error. Using this load error, the rpm matching the angle error in the log and the mapped points we can cross reference in a given torque table what that tq error actually is, or approximate. From there that is applied to the DD table at the respective pedal % and rpm. If im wrong on this, im scratching my head on how the DD gets worked to a tb angle/tb area from tq
I copied the graph pictured above to calculate the angle error from actual and desired but the results are quite different when plotting vs using ETC throttle angle error. seems the polling speed and then count per cell can really throw this off, higher counts drift to zero . i realize i did not have the etc angle error selected though on that log and have added it going forward.