US 12,485,872 B2
Belt loss consideration for determination of electric motor torque split
Stefan Senft, Essen (DE); Andryas Mawardi, Rochester, MI (US); Ashay Sharma, Troy, MI (US); Rama Rohit Sagi, St. Joseph, MI (US); and Nadirsh Patel, Farmington Hills, MI (US)
Assigned to FCA US LLC, Auburn Hills, MI (US)
Filed by FCA US LLC, Auburn Hills, MI (US)
Filed on Jun. 27, 2023, as Appl. No. 18/342,267.
Prior Publication US 2025/0001998 A1, Jan. 2, 2025
Int. Cl. B60W 20/11 (2016.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01)
CPC B60W 20/11 (2016.01) [B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 2510/10 (2013.01); B60W 2510/244 (2013.01); B60W 2710/0666 (2013.01); B60W 2710/083 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A torque control system for a multi-motor electrified powertrain of an electrified vehicle, the multi-motor electrified powertrain comprising an engine and first and second electric motors, the torque control system comprising:
a non-transitory memory having instructions stored thereon; and
a control system comprising one or more processors configured to execute the instructions thereby causing the control system to:
determine a total torque request to be satisfied by the multi-motor electrified powertrain, wherein the first electric motor is connected to a crankshaft of the engine via a belt as part of a belt-driven starter-generator (BSG);
estimate a torque loss associated with the belt based on stored data and an engine speed or a BSG speed;
determine an optimized torque split of the total torque request between the first and second electric motors based on the estimated belt torque loss and to minimize battery power;
determine torque commands for the engine and the first and second electric motors based on the determined optimized torque split; and
control the multi-motor electrified powertrain based on the determined torque commands for the engine and the first and second electric motors,
wherein the torque commands are optimized and therefore result in greater overall multi-motor electrified powertrain torque compared to a conventional torque split that does not account for the torque loss associated with the belt.