Gm Global Technolgoy Operations, Inc.

John Jancowski-Walsh

Edward W Mellet

Dongxu Li

Dara Monajemi

Matthew Pruski

Zhuoran Zhang

A clutch control system for a vehicle includes: a reset module configured to selectively start a reset operation of a clutch actuator of a clutch that engages and disengages an electric propulsion motor to and from a gearset; a target position module configured to perform the reset operation by setting a target position of the clutch actuator to follow a predetermined position profile for the reset operation, the reset operation including (a) opening an orifice between a hydraulic fluid reservoir and an pressure chamber of the clutch actuator (b) closing the orifice after the opening; and a clutch control module configured to actuate the clutch actuator based on the target position thereby performing the reset operation.

Electric motor clutch actuator control systems and methods

A method and system of controlling a drive-neutral-drive (D-N-D) shift in a multi-speed transmission. The method includes receiving a drive to neutral (D-N) shift request followed by a neutral to drive (N-D) shift request; initiating a drive to neutral (D-N) shift and determining an attained gear; determining a scheduled gear; determining if the scheduled gear is equal to the attained gear; and determining whether an off-going clutch for the drive to neutral (D-N) shift is in a hold state. The method further includes (I) aborting the drive to neutral (D-N) shift when (i) the scheduled gear is not equal to the attained gear and (ii) the off-going clutch for the (D-N) shift is in the hold state, or (II) completing a shift to neutral (N) when the off-going clutch for (D-N) shift is not in the hold state followed by shifting back drive (D).

Growing community of inventors

Fenton, MI, United States of America

John Jancowski-Walsh