Quote:
Originally Posted by bimmerfixr
Maybe good info in 1994, but the adaptation values are stored after the key is turned off, otherwise what's the point? I was about to get into the reasons why but decided against it.
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First, we're not far apart on the TCM storing information...it just get's complicated as to what info get's stored. As I'm sure you know...AGS/EGS gets very complicated and can be confusing trying to explain it.
This info though...is correct...the
driver influence features (influenced by throttle and kick down influence) of AGS are NOT stored after the key is turned off...and the text highlighted in red is not just for 1994 cars...but runs up to AGS 8.(+) (which includes the E39 models with the M62 & M54 engines).
The driver influenced features mentioned above fall under the "first variable inputs"... and it's the 2nd variable inputs that get stored in the TCM memory along with "programmable shift maps" that BMW techs can do with BMW diagnostic equipment. Things like detected vehicle straight-line speed (that is, the speed in the forward direction of movement) and/or the transmission output rpm and/or the engine rpm etc. fall into other multiple "evaluation" modes...which include things like hilly or flat terrain, and speed variables like city or highway traffic, etc.
As you can see, it begins to get complicated and I'm sure we're loosing people already!
The main thing I was trying to get across was to debunk the myth that it takes a long time to get the car to adapt if someone before you had driven the car a lot differently.
BMw engineered the "adaptive" nature of ATC to put the driver influence features as the 1st variable input (and these are the ones that aren't stored after the car is turned off). That way, if grandma was driving the car before you...then you started driving more agressively...your driver inputs of pressing the accelerator pedal faster and further etc...would affect the adaptive nature of the transmission within seconds...and that influence would overide other "stored" adaptive influences by "re-evaluating" the 1st and 2nd "variable inputs...which would also affect the "evaluation" process of the TCM.
Again, the computation of all these influences and adaptations and evaluations and various inputs all get tossed into the ATC "soup"...some info is stored but some of it is not...and at the top of the various "inputs" is that BMW designed the tranny to adpat quickly to a new driver...especially if they have a different driving style.
(I'm so sleepy...I hope that this makes sense...so I'm off to bed and if this is really crazy...I'll try to fix it in the morning)
