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Old 04-03-2020, 01:57 PM
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Doug Huffman Doug Huffman is online now
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Mein Auto: CPO2012 X5 35d M57(E70)
Adaptive transmission control. NewTIS

The driver-type adaptation is restarted each time the vehicle pulls away from a standstill.

https://www.newtis.info/tisv2/a/en/e...ission/1yrEeuw

Adaptive transmission control. As with earlier automatic transmissions, the 6-speed automatic transmissions offer the choice between a comfort program and a sport program.

The adaptive transmission control (component of electronic transmission control) adapts the shift characteristics of the comfort program and sport program to the driver's wish and the driving situation. In each of the two programs, the adaptive gearbox control switches on request from a basic characteristic map into a performance-oriented characteristic map:

Comfort program in selector lever position ”D”

The comfort program is based on 2 maps: The XE map (extreme economy) and the E map (economy). The EGS control unit normally chooses the economical characteristic map ”XE” (= basic characteristic map). In case of particular demands (e.g. load requirements), the system will change to the performance-orientated E map. If the input signals change in favour of a more gentle driving style, the system will change back to the more economical XE map.

Sport program at selector-lever position ”M/S”

The Sport program implements dynamic sports shift characteristics. In the sport program, there is the basic S map (sport) and the performance-orientated XS map (extreme sport). With a very dynamic driving style, there is a switch from the basic characteristic map ”S” to the performance-oriented characteristic map ”XS”.

The adaptive gearbox control takes account of the following requirements:

>> Adaptation to driver type
>> Driving uphill or trailer towing
>> Downhill driving
>> Braking deceleration and automatic upshift
>> Winter program
>> Adaptation to driver type

The adaptation to the driver type runs via the following values:

Kick fast

When the accelerator pedal is pressed down quickly, the shift program is changed accordingly. Here, the determined accelerator-pedal value is compared with threshold values in the EGS control unit. The result of this comparison is the proposal of one of the two possible programs (XE or E in comfort program, S or XS in sport program).

Cornering detection

The cornering detection reacts to the lateral acceleration of the vehicle with an indirect adaptation to the driver type.

Lateral acceleration is considered an indirect statement of the preferred driving dynamics and does not cause an immediate gearshift response (shifts when cornering could adversely affect driving stability).

Lateral acceleration is calculated from the signals from the wheel-speed sensors, from the yaw rate and road speed.

Brake evaluation

The brake evaluation is similar to the procedure for the evaluation of the "kick-fast". The braking deceleration is determined and compared with the threshold values in the EGS control unit. The result of this comparison is the proposal of one of the two possible programs (XE or E in comfort program, S or XS in sport program).

The driver-type adaptation is restarted each time the vehicle pulls away from a standstill.

https://www.newtis.info/tisv2/a/en/e...ission/1yrEeuw
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  #2  
Old 04-03-2020, 03:01 PM
Blown540 Blown540 is offline
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THANK YOU, Very GOOD INFORMATION!

THANK YOU for the Information! Very GOOD to KNOW! Jim in TN
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Old 04-03-2020, 08:15 PM
B4_685 B4_685 is offline
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Adaptive transmission control. NewTIS

Very cool! - presumably similar for the 8speed?


2012 E70 X5 50i
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