US 12,305,748 B2
Two speed automatic transmission with a friction and dynamically controllable one way clutch for power shifting in an electric vehicle
Fabio Filippo Irato, Turin (IT); Alessio Anzaldi, Vinovo (IT); and Harish Mathiazhagan, Canton, MI (US)
Assigned to DANA GRAZIANO S.R.L., Rivoli (IT)
Filed by DANA GRAZIANO S.R.L., Turin (IT)
Filed on Jun. 30, 2023, as Appl. No. 18/345,320.
Claims priority of provisional application 63/367,585, filed on Jul. 1, 2022.
Prior Publication US 2024/0068560 A1, Feb. 29, 2024
Int. Cl. F16H 61/04 (2006.01); F16H 3/089 (2006.01); F16H 3/12 (2006.01); F16H 61/22 (2006.01); F16H 61/28 (2006.01); F16H 61/30 (2006.01); F16H 61/32 (2006.01); F16H 3/08 (2006.01); F16H 3/091 (2006.01); F16H 3/093 (2006.01); F16H 48/00 (2012.01)
CPC F16H 61/04 (2013.01) [F16H 3/12 (2013.01); F16H 61/30 (2013.01); F16H 61/32 (2013.01); F16H 2003/0811 (2013.01); F16H 3/089 (2013.01); F16H 3/091 (2013.01); F16H 3/093 (2013.01); F16H 48/00 (2013.01); F16H 2061/044 (2013.01); F16H 2061/2823 (2013.01); F16H 2061/2853 (2013.01); F16H 2200/0034 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A transmission system for a vehicle, comprising:
an input configured to couple to a prime mover of the vehicle;
a first gear ratio;
a second gear ratio;
a dynamic controllable clutch (DCC);
a friction clutch;
a transmission output; and
a controller comprising instructions stored in non-transitory memory that are executable by the controller to:
adjust a state of the DCC and a state of the friction clutch to selectively engage the first gear ratio and the second gear ratio for providing torque transfer from the input to the transmission output of the transmission system;
wherein the DCC and the friction clutch are the only clutches of the transmission system for the vehicle, and wherein adjusting the state of the DCC includes activating one or more coils;
wherein the DCC is a selectable one-way clutch that includes the one or more coils that are configured to independently cause a forward strut and a reverse strut to selectively engage and disengage an output of the DCC in different operating modes;
wherein the output in the DCC is coupled to a drive gear;
wherein the forward strut and the reverse strut are hingingly coupled to an input of the DCC;
wherein, during engagement of the forward strut, torque transfer from the input of the DCC to an output of the DCC occurs in a first rotational direction and is prevented in a second rotational direction; and
wherein, during engagement of the reverse strut, torque transfer from the input of the DCC to the output of the DCC occurs in the second rotational direction and is prevented in first rotational direction.