English: The system includes the following components:
E = internal combustion engine
1 = motor/generator 1, turning sun gear 1
2 = motor/generator 2, turning sun gear 2
Planetary gear sets
S1/P1/R1 = first planetary gear set: sun/pinion/ring gears
S2/P2/R2 = second planetary gear set: sun/pinion/ring gears
S3 = third planetary gear set: sun gear (intermediate pinion / idler gear not labeled, shown in purple; because of its presence, S3 rotates counter to S2)
Clutches / brakes
Clutch on R2
Clutch on S3
Note that planetary gear sets 1 and 2 are compounded, as are 2 and 3:
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