Self-Study Program

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367_027
3rd gear i = 1.556
The turbine shaft drives ring gear H1 of the
primary planetary gear set. Ring gear H1 drives
the planetary gears P1, which revolve around the
stationary sun gear S1.
Planet carrier PT1 is driven in this way.
Clutch K1 connects PT1 to sun gear S3 and thus
introduces torque into the secondary planetary
gear set.
Clutch K3 likewise introduces torque into the
secondary planetary gear set driving sun gear S2.
The secondary planetary gear set is locked when
clutches K1 and K3 close.
Torque is now transmitted directly from the primary
planetary gear set to the gearbox output shaft.
shift elements: clutch K1 - clutch K3
4th gear i = 1.155
The turbine shaft drives the ring gear H1 of the
primary planetary gear set and the outer plate
carrier of clutch K2.
Ring gear H1 drives the planetary gears P1, which
revolve around the stationary sun gear S1. Planet
carrier PT1 is driven in this way.
Clutch K1 connects PT1 to sun gear S3, and thus
introduces torque into the secondary planetary
gear set.
Clutch K2 connects the turbine shaft to planet
carrier PT2, and likewise introduces torque into
the secondary
planetary gear set.
The long planetary gears P2, which mesh with
the short planetary gears P3, together with planet
carrier PT2, drive ring gear H2, which is connected
to the gearbox output shaft.
Shift elements: clutch K1 – clutch K2