Kristin M Day

US Patent:

8092339, Jan 10, 2012

Filed:

Oct 13, 2008

Appl. No.:

12/250530

Inventors:

Anthony H. Heap - Ann Arbor MI, US
Lawrence A. Kaminsky - Sterling Heights MI, US
Kristin L Day - Commerce Township MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI
Daimler AG - Stuttgart
Chrysler LLC - Auburn Hills MI
Bayerische Motoren Werke Aktiengesellschaft - Munich

International Classification:

B60W 10/02

US Classification:

477 5, 477 77, 477 83, 70 51, 70 67

Abstract:

A method for controlling a powertrain includes operating a transmission in a neutral operating range state, monitoring commands affecting an input speed, monitoring a tracked clutch slip speed, determining constraints on an input acceleration based upon the commands, determining a clutch slip acceleration profile based upon the constraints on the input acceleration, determining an input acceleration profile based upon the clutch slip acceleration profile, and controlling the powertrain based upon the clutch slip acceleration profile and the input acceleration profile.

US Patent:

20090111637, Apr 30, 2009

Filed:

Oct 8, 2008

Appl. No.:

12/247317

Inventors:

Kristin L. Day - Commerce Township MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

F16H 57/04
G06F 17/00

US Classification:

475159, 701 51, 903945

Abstract:

A method for controlling hydraulic line pressure for component lubrication in a transmission includes monitoring a speed of an engine and an electric machine, determining a minimum line pressure required to lubricate the engine based upon the speed of the engine, determining a minimum line pressure required to lubricate the electric machine based upon the speed of the electric machine, controlling a minimum line pressure of a hydraulic control system to at least satisfy a larger value of the minimum line pressures.