Fca US LLC

Andryas Mawardi

Nadirsh Patel

Ashay Sharma

Stefan Senft

Rama Rohit Sagi

Torque control techniques for a multi-motor electrified powertrain of an electrified vehicle include determining a total torque request to be satisfied by the multi-motor electrified powertrain, wherein a first electric motor is connected to a crankshaft of an engine via a belt as part of a belt-driven starter-generator (BSG), estimating a torque loss associated with the belt based on stored data and an engine speed or a BSG speed, determining an optimized torque split of the total torque request between the first electric motor and a second electric motor based on the estimated belt torque loss and to minimize battery power, determining torque commands for the engine and the first and second electric motors based on the determined optimized torque split, and controlling the multi-motor electrified powertrain based on the determined torque commands for the engine and the first and second electric motors.

Belt loss consideration for determination of electric motor torque split

Techniques modeling and controlling a torque converter of a vehicle include accessing a look-up table relating (i) various K-factors of a turbine of the torque converter to (ii) various K-factors of an impeller of the torque converter, speed ratios of the torque converter, and torque ratios of the torque converter, calculating a K-factor of the turbine based on the set of parameters, determining a speed ratio and a torque ratio of the torque converter based on the calculated turbine K-factor using the look-up table, determining a target speed and a target torque for the impeller based on the determined speed and torque ratios of the torque converter, and controlling a torque generating system including the torque converter to achieve the target impeller speed and torque to thereby achieve the torque request at a driveline and mitigate or eliminate noise/vibration/harshness (NVH).

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Rochester, MI, United States of America

Andryas Mawardi