Patent ID: 8042325
Filing Date: 2011-10-25
Classification: B60W,B60Y,F02D,F16H,Y10T

Abstract:
1. 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 comprising the steps of: (a) using a engine speed and a torque converter constant to estimate a first magnitude of torque being transmitted from the engine to the torque converter while regenerating the particulate filter and a second magnitude of torque being transmitted from the engine to the torque converter while no regeneration of the particulate filter occurs; (b) using engine parameters to determine a first reference magnitude of current engine torque being produced while regenerating the particulate filter and a second reference magnitude of current engine torque being produced while no regeneration of the particulate filter occurs; (c) determining a first torque error from a difference between the first estimated magnitude and the first reference magnitude, and a second torque error from a difference between the second estimated magnitude and the second reference magnitude; (d) recording the first and second torque errors with reference to the engine speed, the reference magnitude, and the mode of regeneration at which the torque error is determined; (e) determining a differential torque error from the recorded first and second torque errors using a current engine speed, a current reference engine torque and a current mode of regeneration; (f) producing a corrected engine torque from a sum resulting from the current reference engine torque and the differential torque error; and (g) using the corrected engine torque to control operation of the transmission.