Transmission with continuously variable transmission ratio

A branched power transmission including several transmission ratio ranges, each transmission ratio range having a steplessly adjustable transmission ratio, said transmission comprising:

• a drive shaft for non-rotatable connection with an engine;
• a distributor transmission connected with the drive shaft and including distributor transmission output shafts non-rotatably connected with respective driven shafts of a variable speed unit;
• a parallel shaft gearbox having a pair of input shafts coupled through respective clutches with respective ones of the driven shafts of the variable speed unit, and having a gearbox output shaft that forms a branched power transmission output shaft;
• wherein the branched power transmission includes at least two transmission ratio ranges that are provided by gears carried by each input shaft of the parallel shaft gearbox and that are operatively connected with the branched power transmission output shaft, an electrical drive/generator machine, and a clutch non-rotatably connected with the electrical machine;
• wherein in the coupled condition the electrical machine is non-rotatably connected with the also non-rotatable transmission structure, and in the uncoupled condition the transmission has an expanded operating region in which the electrical machine is operated.

A transmission with a steplessly adjustable transmission ratio, said transmission comprising:

• a variable speed unit having an input shaft and an output shaft, whose transmission ratio is steplessly adjustable,
• a first planetary transmission connected with a drive shaft, the input shaft of a variable speed unit, and a connecting shaft,
• a second planetary transmission connected with the connecting shaft, the output shaft of the variable speed unit, and an output shaft, and
• an electrical machine that is non-rotatably connected with the connecting shaft.