Patent ID: 8224538

Claim:
An automatic transmission having: a transmission housing; an input member and an output member; a plurality of torque-transmitting mechanisms operable to provide a plurality of gear ratios between the input member and the output member; a torque sensor disposed in the transmission housing proximate the output member; and a transmission control module having a control logic sequence, wherein the control logic operates to control engagement of each of the torque-transmitting mechanisms, and wherein the torque sensor is capable of detecting a torque applied to the output member and sending a torque signal to the transmission control module, the control logic sequence including: a first control logic for generating a torque signal indicative of the torque applied to the output member; a second control logic for filtering the torque signal; a third control logic for generating and storing an initial torque signal data set from the filtered torque signal; a fourth control logic for receiving a gear change command; a fifth control logic for commanding a hydraulic fluid pressure pulse time and pressure pulse value to engage a first torque-transmitting mechanism; a sixth control logic for disengaging a second torque-transmitting mechanism; a seventh control logic for calculating an initial rate-of-change of the stored torque signal data set; a eighth control logic for storing the initial rate-of-change; a ninth control logic for generating and storing a second torque signal data set from the filtered torque signal; a tenth control logic for calculating a second rate-of-change of the second torque signal data set; and an eleventh control logic for adjusting the hydraulic fluid pressure pulse time and pressure pulse value if the second rate-of-change is not equal to the initial rate-of-change and performing the ninth control logic if the second rate-of-change is equal to the initial rate-of-change.