Abby Normal

Disconnect the battery for 30 minutes, hook it back up, start the car and turn on the AC and then drive it like you stole it.

928DK

Lol

Steve Cattaneo

ENGINE


As we all know, our cars have ECU (engine control modules) which are computers. Any computer needs memory to function properly. There are several kinds of memory; PROM (programmable read only memory) and ROM (read only memory). They hold libraries.

Maps are programs stored in the PROM and ROM and are a set of instructions for different driving conditions. An example: if you push the gas pedal to the floor the ECU knows the car is under a load by inputs from the RPM, MAF and TPS sensors, for these set of conditions the ECU will advance the cars timing and increase injector pulse time, more fuel for more air.



RAM (random access memory) and KAM (keep alive memory) temporary information from sensors are stored, updated and rearranged. It’s a journal of driving and operating conditions that have been recorded. Fault codes are also stored in RAM and KAM. Even though the ECU has a map, it also has the ability to relearn new driving condition and strategies, not drives adaptation. It learns from systems wear or sensor failures. The ECU will adapt to the engines running condition, not your driving style and will make the necessary engine management corrections to optimize operating conditions at that moment, the best engine timing, fuel mixture setting for any giving moment of load settings and wear, vacuum leak, air/ fuel mixture and timing, Based on engine conditions,not drivers driving style and definitely not on the transmission.




Driving Style Adaptation, Mercedes Benz Transmissions


Since MB invented the program for Transmission Driving Style Adaptation and is my favored subject, the following information is based on Mercedes Benz 722.6 and 722.9 electronic shift Transmissions and my personal experience.

“The invention relates to a method for modifying a defined adaptive driving strategy. The aim of the invention is to provide a method with which the defined adaptive driving strategy that is saved in the control system for an automatic transmission can be adapted to a different driver personality having a different driver's performance. To this end, the parameters used for the driving strategy are modified by said other driver. The data required for this modification are input via an input device and an interface in the electronic system of the transmission.”


The Driving style Adaptation program is stored in the Transmissions Control Module (TCM) and lives for the moment, does not store any driver’s style BAD driving habits and is Key reset. The TCM will adapt and respond in shift feel and time based on theses inputs. Fast take off acceleration, lateral acceleration, how often you change gears in the sport mode. This adaptive driving style program is more aggressive in AMG models.



Below is a technical post I did, The Adaptation data will explain how the TCM interprets adaptation values and Driving style Adaptation.

http://forums.mbworld.org/forums/sho...91#post1634191



Based on some engine conditions YES. Drivers driving style, No. definitely not the transmission on any 928.

Panzer9

My S4 is very similar to my wife, in that she simply insists on getting it VERY hard @ least once a week, or she's very grumpy, and doesn't run right.You can drive it around town a few times a week, but the weekend is for the rough stuff!

Ron_H

I disconnect my battery once a day at least, and every time I expect the car to be parked for more than four hours. (got a gremlin hiding in there). So I guess my computer relearns every day, and that accounts for what Dr. Bob explained as poor mileage until it resets itself. Well, I can say that I don't notice anything different at all each day. It simply does what it did the previous day, but that is my subjective opinion. It still shifts hard into second and leaves some rubber around town. And it still idles well around 800 rpm all day long. And it has only about 15,000 miles on a rebuild. I honestly don't know how anyone could feel any differences after disconnecting their battery and then driving the car aggressively. Of course I drive my car sedately ALL the time (don't I?) around here because I live in Sunnyvale, and so do many of the Smokeys around here. On the road, well ...............

John Speake

Hello Ron,
If the car is in good condition and the MAF is in reasonable clibration, then the amount of adaptation time required will be short ....

Abby Normal

Ron,

The`86.5 computers don't learn, they are plug and play.

John Speake

Shoot !!! I didn't notice it was a 86.5 :-(

You're quite correct Abby...

fabric

This is mentioned on the Jager site about the last year of the GTS, which is what bigs got to ride in:

http://jageng.com/garage9/product_in...2d97e38d095cbf

Alan

Chris - that describes the dynamic kickdown - Auto only and non- programmable/adaptable. It monitors your gas pedal movements so that relative as well as absolute throttle opening determines when the transmission kicks-down.

Nice feature but it does the same thing for everyone... It certainly makes the car respond quicker to your driving style but not by any adaptation.

Nice if Jager now has a kit for it - I know Schocki modded his early GTS to add this. However- I gathered it was an intrusive install though - not for the feint-hearted. I'm thinking the Jager set up is probably just a parallel kickdown switch from how its described...

Alan

Ron_H

So what I notice is simply the same settings every time I re-connect my battery and drive off?? That's simple. I like it. It is consistent. My mileage is due to my right ankle spasms then. I'll take it to a psychiatrist in that case. Fuel is getting too expensive. Think I'll get an Audi for around town. In the desert, I can almost watch the fuel guage going down.

fabric

Yeah, that's what I was thinking of, the mod Schocki did. You're right, the Jager kit is just a parallel kickdown switch. Thanks for the catch and clarification Alan!

sublimate

I taught mine to "play dead".

Alan

Yeah there is that one, and 'Badly Behaved' too probably....

Alan