US 9,810,288 B2
Transmission
Stefan Beck, Eriskirch (DE); Christian Sibla, Friedrichshafen (DE); Martin Brehmer, Tettnang (DE); and Josef Haupt, Tettnang (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed on Jul. 15, 2015, as Appl. No. 14/799,854.
Claims priority of application No. 10 2014 213 694 (DE), filed on Jul. 15, 2014.
Prior Publication US 2016/0017961 A1, Jan. 21, 2016
Int. Cl. F16H 3/66 (2006.01); F16H 3/44 (2006.01)
CPC F16H 3/66 (2013.01) [F16H 3/666 (2013.01); F16H 2003/442 (2013.01); F16H 2200/0065 (2013.01); F16H 2200/0069 (2013.01); F16H 2200/2012 (2013.01); F16H 2200/2046 (2013.01); F16H 2200/2048 (2013.01); F16H 2200/2097 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A transmission (G), comprising:
four planetary gear sets (P1, P2, P3, P4), a plurality of shafts (W1-W8), and a first, second, third, fourth and fifth shift element (B1, B2, K1, K2, K3), wherein the selective meshing of the shift elements brings about different transmission ratio relationships between a transmission input shaft (GW1) and a transmission output shaft (GW2);
a first one of the shafts (W1) constantly connected to the transmission input shaft (GW1) and to a bar (St-P3) of the third planetary gear set (P3);
a second one of the shafts (W2) constantly connected to the transmission output shaft (GW2) and to a bar (St-P1) of the first planetary gear set (P1);
a third one of the shafts (W3) constantly connected to a sun gear (So-P3) of the third planetary gear set (P3) and fixable in a torque-proof manner through the first shift element (B1);
a fifth one of the shafts (W5) constantly connected to a ring gear (Ho-P2) of the second planetary gear set (P2);
a sixth one of the shafts (W6) constantly connected to a ring gear (Ho-P1) of the first planetary gear set (P1);
a ring gear (Ho-P3) of the third planetary gear set (P3) constantly connected to a sun gear (So-P2) of the second planetary gear set (P2) and forming a component of a seventh one of the shafts (W7);
an eighth one of the shafts (W8) constantly connected to a bar (St-P2) of the second planetary gear set (P2);
two elements of the second planetary gear set (P2) connected to each other through the fourth shift element (K2), such that, with a locked fourth shift element (K2), the ring gear (Ho-P2), the bar (St-P2) and the sun gear (So-P2) have the same rotational speed; and
one of the second shift element (B2) or the fifth shift element (K3) arranged in series with a sixth shift element (K4) in the power flow between the fifth shaft (W5) and a sun gear (So-P4) of the fourth planetary gear set (P4).