Fca US LLC

Hangxing Sha

Nadirsh Patel

Indrasen Karogal

Abdulquadri Oluwatobi Banuso

Krishna Reddy Madireddy

An electrified powertrain that generates and transfers drive torque to a driveline of a hybrid electric vehicle is provided. The powertrain includes an engine, an electric motor, a clutch, a torque converter and a controller. The clutch selectively disengages an engine output from a remainder of the electrified powertrain. The torque converter transfers rotating power from at least one of the engine and the electric motor to a transmission. The controller is configured to: receive an impeller speed and a turbine speed of the torque converter; determine a target turbine torque; determine, coefficients as a function of the impeller speed, turbine speed and target turbine torque; update an adaptive lookup table based on the coefficients; and determine an adapted turbine torque based on the updated adaptive lookup table.

Torque control modeling for torque control of hybrid electric powertrains

A feedforward control method for an electrified powertrain including a torque transfer device arranged between an electric motor and a transmission includes monitoring a set of operating parameters of the electrified powertrain, determining a desired input speed for the torque transfer device based on the set of operating parameters, determining a desired input torque for the torque transfer device based on a characteristics model or map of the torque transfer device and the desired input speed, performing an observer-based determination of a final feedforward torque for the torque transfer device based on the desired input speed, the desired input torque, a filtered actuator achieved torque for the electric motor, and minimum and maximum torque limits for the transmission, and controlling the electric motor based on the final feedforward torque for the torque transfer device.

Optimal feedforward observer based creep control for electrified powertrains with a torque converter or a launch clutch

An adaptive feedforward control method for an electrified powertrain including a torque converter includes determining a desired input speed for a torque converter based on the set of operating parameters of the electrified powertrain, determining minimum and maximum torques for an impeller of the torque converter based on the set of operating parameters of the electrified powertrain, determining a raw feedforward torque for the torque converter impeller based on the desired input speed for the torque converter and a speed of a turbine of the torque converter, determining a final feedforward torque for the torque converter impeller based on the raw feedforward torque for the torque converter impeller and the minimum and maximum torques for the torque converter impeller, and controlling an electric motor of the electrified powertrain based on the final feedforward torque for the torque converter impeller.

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Hangxing Sha