Michael L Polk

US Patent:

8042325, Oct 25, 2011

Filed:

Nov 1, 2007

Appl. No.:

11/933598

Inventors:

Stephen M. Cicala - Dearborn Heights MI, US
Cristina Ike - Ferndale MI, US
Charles W. Suter - South Lyon MI, US
Joseph Kucharski - Livonia MI, US
Bradley D. Riedle - Northville MI, US
Dave M. Dillon - Dearborn Heights MI, US
Michael Polk - Dearborn MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F01N 3/00

US Classification:

60285, 60274, 60295, 60297, 60311

Abstract:

In a motor vehicle powertrain that includes a diesel engine, a particulate filter and a torque converter, a method for correcting an indicated engine output torque includes estimating a magnitude of torque being transmitted from the engine to the torque converter while regenerating the particulate filter, determining a reference magnitude of current engine torque being produced while regenerating the particulate filter, determining a torque error from a difference between the estimated magnitude and the reference magnitude, recording the torque error, determining a current torque error from the recorded torque error using a current engine speed and a current reference engine torque as indices to the recorded engine toque error, producing a corrected engine torque from the sum of the current torque error and the current reference engine torque, and using the corrected engine torque to control operation of the transmission.