US 12,291,111 B2
Control system for an electric vehicle
Omkar A. Harshe, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Feb. 15, 2023, as Appl. No. 18/110,275.
Claims priority of provisional application 63/313,868, filed on Feb. 25, 2022.
Prior Publication US 2023/0271509 A1, Aug. 31, 2023
Int. Cl. B60L 50/60 (2019.01); B60L 58/12 (2019.01); B60L 58/24 (2019.01)
CPC B60L 50/60 (2019.02) [B60L 58/12 (2019.02); B60L 58/24 (2019.02); B60L 2210/10 (2013.01); B60L 2210/40 (2013.01); B60L 2240/423 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control system for controlling a powertrain of an electric vehicle, the powertrain comprising a traction motor and a battery for powering the traction motor, wherein the control system is configured to:
detect a low state of charge of the battery; and
operate the powertrain in a low state of charge mode when the low state of charge is detected,
wherein, in the low state of charge mode;
the control system adjusts at least one parameter of the powertrain to reduce power drawn from the battery; and
the control system is configured to determine when a speed of the traction motor exceeds a threshold, and to reduce a torque of the traction motor to a fixed limit when the speed exceeds the threshold in the low state of charge mode.