US 9,810,300 B2
Power-split continuously variable transmission apparatus having a summing planetary transmission
Viktor Warth, Friedrichshafen (DE); Matthias Reisch, Ravensburg (DE); and Bernhard Sich, Friedrichshafen (DE)
Assigned to ZF FRIEDRICHSHAFEN AG, Friedrichshafen (DE)
Appl. No. 15/35,394
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
PCT Filed Oct. 14, 2014, PCT No. PCT/EP2014/071937
§ 371(c)(1), (2) Date May 9, 2016,
PCT Pub. No. WO2015/071038, PCT Pub. Date May 21, 2015.
Claims priority of application No. 10 2013 223 243 (DE), filed on Nov. 14, 2013.
Prior Publication US 2016/0290459 A1, Oct. 6, 2016
Int. Cl. F16H 37/08 (2006.01); F16H 15/52 (2006.01)
CPC F16H 37/0853 (2013.01) [F16H 15/52 (2013.01); F16H 2037/0886 (2013.01); F16H 2037/0893 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power-split, continuously variable transmission device, comprising:
an input shaft;
an output shaft;
a summing planetary transmission, the summing planetary transmission comprising a sun gear, a carrier and a ring gear;
at least one planetary gear set;
a variator, the variator being a mechanical friction wheel variator having at least three shafts, a friction wheel of the variator being approximately cone-shaped, at least in sections, the at least three shafts of the variator comprising a first shaft, a second shaft and a third shaft;
a first plurality of shafts, the summing planetary transmission, the at least one planetary gear set and the variator in operative connection with one another by the shafts of the first plurality of shafts;
a second plurality of shafts;
a plurality of shift elements, the shafts of the second plurality of shafts couplable with the plurality of shift elements for presentation of at least three transmission ratio ranges; and
an additional planetary gear set allocated to the variator, one shaft of the additional planetary gear set coupled with the third shaft of the variator, at least one additional shaft of the additional planetary gear set coupled with the first shaft of the variator or is connectable with the first shaft of the variator with one of the shift elements of the plurality of shift elements that is in operative connection with the input shaft,
wherein a continuously variable transmission ratio of the at least three transmission ratio ranges is provided by the variator,
wherein the summing planetary transmission, the at least one planetary gear set and the variator are arranged coaxial to one another, and
wherein, in one of the at least three transmission ratio ranges, a total power is guidable between the input shaft and the output shaft by the variator.