Harish Sivasubramanian from Ellicott City, MD, age 46

Harish Sivasubramanian Phones & Addresses

Torque Converter Clutch Control
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US Patent:

20070287594, Dec 13, 2007
Filed:

Jun 8, 2006
Appl. No.:

11/422991
Inventors:

John W. DeGeorge - Michigan Center MI, US
Javed A. Dada - Lapeer MI, US
Harish Sivasubramanian - Rochester MI, US
Gary K. Lowe - Troy MI, US
Gary Binienda - Clarkston MI, US
Peter Hartman - West Bloomfield MI, US
International Classification:

B60W 10/02
US Classification:

477176
Abstract:

A system for controlling a torque converter clutch in a vehicle powertrain includes a controller having an input for receiving powertrain operating parameter information. The controller is configured to determine a torque converter speed ratio based on the powertrain operating parameter information and to compare the speed ratio to a specified speed ratio limit. The controller is further configured to determine a target torque converter slip when the speed ratio exceeds or meets or exceeds the specified speed ratio limit; to compare the target slip with a desired slip value based on an vehicle noise, vibration or harshness (NVH) limit; and to control torque transmission of the torque converter clutch based on comparison of the target slip and the desired slip value. A method for controlling a torque converter clutch is also provided.