Ming Te Cao, 674710 Wellington Dr, Okemos, MI 48864

8090512, Jan 3, 2012

Jul 24, 2008

12/178696

Ming Cao - Rochester Hills MI, US
Chi-Kuan Kao - Troy MI, US
Chunhao J. Lee - Troy MI, US

GM Global Technology Operations LLC - Detroit MI

G06F 7/00

701 68, 701 1, 701 67, 192 8563, 192109 F

A method optimizes a fill event of an apply chamber of a fluid-actuated clutch, and includes determining input values describing the fill event, and then estimating a fill time using the input values. The method includes filling the apply chamber using the estimated fill time (EFT) or within an allowable range of the EFT. The input values can include a command line pressure, command fill stroke pressure, and an estimated viscosity of the fluid, although other values can be used. The input values are processed through a neural network having an input layer, an optional hidden layer, and an output layer. An assembly includes a fluid-actuated clutch having an apply chamber and a controller operable for estimating the fill time required for filling the apply chamber, and for controlling the fill of the apply chamber within the EFT.

8457847, Jun 4, 2013

Sep 28, 2010

12/892832

Dongxu Li - Warren MI, US
Kumaraswamy V. Hebbale - Troy MI, US
Chunhao I. Lee - Troy MI, US
Farzad Samie - Franklin MI, US
Chi-Kuan Kao - Troy MI, US
Ming Cao - Glastonbury CT, US

GM Global Technology Operations LLC - Detroit MI

G06F 7/00

701 51, 475 86

A powertrain includes a transmission coupled to a driveline. A method for monitoring torque of the driveline includes monitoring signals from first and second rotational sensors located at respective first and second rotationally-coupled positions of the driveline separated by a distance along the driveline, determining rotation of the driveline at the first and second rotationally-coupled positions from said signals, determining a twist angle derived from a difference between the rotations of the driveline at the first and second rotationally-coupled positions, calculating a driveline torque corresponding to the twist angle, and controlling operation of the powertrain in response to the driveline torque.