US 12,391,130 B1
Static friction to dynamic friction spin up modeling and controls for vehicle electric motor in neutral
Zachary L Tuller, Grand Rapids, MI (US)
Assigned to FCA US LLC, Auburn Hills, MI (US)
Filed by FCA US LLC, Auburn Hills, MI (US)
Filed on Apr. 19, 2024, as Appl. No. 18/640,763.
Int. Cl. B60W 10/08 (2006.01); B60L 15/20 (2006.01); B60W 10/02 (2006.01); B60W 10/10 (2012.01)
CPC B60L 15/2054 (2013.01) [B60W 10/02 (2013.01); B60W 10/08 (2013.01); B60W 10/10 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/507 (2013.01); B60L 2260/28 (2013.01); B60W 2510/081 (2013.01); B60W 2710/021 (2013.01); B60W 2710/081 (2013.01); B60W 2710/083 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A modeling and control system for an electric motor of an electrified vehicle, the system comprising:
a set of sensors configured to measure a set of operating parameters of the electrified vehicle, the set of operating parameters including (i) a speed of the electrified vehicle and (ii) a speed of the electric motor, wherein the electric motor is selectively connected to and disconnected from a driveline of the electrified vehicle by a disconnect system; and
a control system configured to command the disconnect system to disconnect the electric motor from the driveline and prepare for reconnection of the electric motor to the driveline 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; 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.