Continuously variable power split transmission

Continuously variable power split transmission for powering vehicles and/or work machines by a combustion engine (VM), including a variator (V), a summing gear train and a number of couplings, the variator delivering a fraction of the power of the combustion engine with a speed that is continuously variably controlled between maximum speeds in both directions to the summing gear train, where it is added to the other fraction of the power, and where the transition between a plurality of ranges occurs in points of synchronism, the summing gear train being a planetary gear train with four shafts including a first sun gear (S1), a second ring gear (H2), a first ring gear (H1) and a number of planetary gears (P1, P2) journaled on a planet carrier (St1), wherein:

• a. the couplings (C0, C1;
• C0, C1, B0, B1) are incorporated in one common entry unit (E), which is arranged in the flux of power between the combustion engine (VM) and the summing gear train (SG2),
• b. the summing gear train (SG2) includes first planetary gears (P1) and second planetary gears (P2) journaled on a common planet carrier (St1), the first (P1) and the second planetary gears (P2) meshing with each other,
• c. the first sun gear (S1) or the first ring gear (H1) are driven by the combustion engine (VM) and the second ring gear (H2) is driven by the variator (V), the first sun gear (S1) or the first ring gear (H1)—for the transition from one range to the next range in a point of synchronism (1,2,3)—being in turn drivingly connected with the combustion engine (VM)
• d. the planet carrier (St1) is drivingly connected with the output shaft (StW1) of the transmission.