Technical data

The six automatic transmission gears are shifted via a Ravigneaux planetary gear set with a series-con-

nected simple planetary gear set.

This arrangement is known as the Lepelletier gear-set concept.

Automatic transmission

Control of the automatic transmission is effected

by a control unit known as mechatronics. This is a

combination of an electronic control unit and a

hydraulic switching device (control valve assem-

bly).

Gear changes can be controlled more exactly

than before due to mechatronics. This provides

drivers with an optimised shifting quality and an

increased level of driving comfort. Using the

Planet gear

Turbine shaft

Internal gear 1

Sun gear 1

Sun gear 2

Internal gear 2

Planet gear, short

Planet carrier

Sun gear 3

Planet gear, long

Simple planetary gear set Ravignaux planetary gear set

Lepelletier gear set

Hydraulic switching device

(control valve assembly)

Control unit for

automatic transmission J217

Multifunctional switch F125

270_221

270_240

incoming sensor signals, the control unit recog-

nises the current state of the gearbox and the

driver's intention, reacting to these with adjusted

shift points.

Driver wishes ranging from an extremely sporty

to a very economical driving style are recognised

and taken into consideration. Mechatronics is

arranged within the gearbox, located directly at

the control valve assembly.