US 11,982,348 B2
Dual double synchronizer e-transmission for reducing torque interruption during gear shifts
Filip D. Schacht, Meulebeke (BE); and Kurt Cattoor, Koolkerke (BE)
Assigned to DANA BELGIUM N.V., Bruges (BE)
Filed by Dana Belgium N.V., Flanders (BE)
Filed on Oct. 1, 2021, as Appl. No. 17/449,773.
Prior Publication US 2023/0103830 A1, Apr. 6, 2023
Int. Cl. F16H 3/00 (2006.01); F16H 61/04 (2006.01)
CPC F16H 61/0403 (2013.01) [F16H 3/006 (2013.01); F16H 2061/0422 (2013.01); F16H 2061/0433 (2013.01); F16H 2061/0492 (2013.01); F16H 2312/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A transmission system comprising:
a first electric motor input shaft having two gears configured to mesh with a first pair of gears of a first synchronizer on a lay shaft;
a first electric motor coupled to the first electric motor input shaft;
a second electric motor input shaft having at least one gear configured to mesh with one gear of a second pair of gears of a second synchronizer on the lay shaft; and
a second electric motor coupled to the second electric motor input shaft;
wherein, the first electric motor and the second electric motor are configured to operate synchronously to increase torque supply with each of the first synchronizer and the second synchronizer in a first gear arrangement, and independently to decrease torque supply to allow the respective first synchronizer or the second synchronizer to shift to a second gear arrangement.