Fca US LLC

Zachary L Tuller

Nadirsh Patel

Naresh Sathyamoorthy

Indrasen Karogal

Paolo Olivieri

Alessandro Lelli

Pier Luca Di Gristina

Giuseppe Corallo

Gaurav S Sadekar

Dario Morina

Allwyn D Bhakare

Andy M Lee

Federico De Bosio

Mckenzie Walsh

A hybrid electric vehicle includes: a dual clutch transmission having first and second sub-transmissions having respective first and second clutches and first and second synchronizers, and an electric motor rotationally coupled to the second sub-transmission for common rotation therewith; and a control system including a hybrid controller and a transmission controller with the HCP being a supervisory controller, wherein the control system is configured to execute an engine clutch start procedure using the electric motor, and wherein the procedure eliminates hard vehicle speed limits, provides smooth wheel torque during the procedure, and increases a number of transmission gears available for the procedure.

Hybrid vehicle engine start using clutches of dual clutch transmission

A modeling and control technique for an electric motor of an electrified vehicle includes preparing for reconnection of an electric motor to a driveline, which were temporarily disconnected by a disconnect system therebetween, by commanding the electric motor to generate an open-loop torque in an attempt to overcome a static friction of the electric motor and to begin spinning the electric motor, receiving a set of operating parameters of the electrified vehicle including (i) a speed of the electrified vehicle and (ii) a speed of the electric motor, and in response to detecting that a speed/position of the electric motor increases to the value greater than zero, commanding a feed-forward target speed for open-loop control of the electric motor, wherein the feed-forward target speed ignores static friction dynamics and is offset by a first offset to compensate for delay in actuating the electric motor.

Static friction to dynamic friction spin up modeling and controls for vehicle electric motor in neutral

A control method for an electrified powertrain of an electrified vehicle having a first electric motor before a transmission and a second electric motor after the transmission includes receiving, by a control system and from a set of sensors, a set of operating parameters of the electrified powertrain, each operating parameter of the set of operating parameters relating to a torque split between the first and second electric motors, determining, by the control system, first and second optimal torque splits between the first and second electric motors for a transmission shift event by solving a torque split optimization problem based on the set of operating parameters, and controlling, by the control system, the first and second electric motors based on the first optimal torque split followed by the second optimal torque split relative to the transmission shift event.

Optimum shifting of electrified powertrain systems having electric motors before and after a transmission

Speed control techniques include, based on a set of target speed inputs indicative a target speed for an electric motor, determining a set of profiling inputs including (i) the target speed and (ii) a set of desired acceleration calibrations, performing jerk-based profiling based on the set of profiling inputs to determine at least one of an open-loop acceleration command and a profiled target speed, determining a closed-loop torque adjustment based on the profiled target speed and a measured speed of the electric motor, determining an electric motor torque command based on the open-loop acceleration command and the closed-loop torque adjustment, and controlling the electric motor based on the respective electric motor torque command to improve vehicle responsiveness in reaching the target speed.

Use of triangular numbers in calculation of jerk limited speed profile for determination of target speeds and feed-forward torque for speed controller

Growing community of inventors

Grand Rapids, MI, United States of America

Zachary L Tuller