Patent ID: 8620543

Claim:
A vehicle comprising: a prime mover; a powertrain having first and a second rotatable members, wherein the powertrain includes a transmission that is connected to the prime mover; a first and a second speed sensor positioned with respect to the first and second rotatable members, respectively, wherein the first and second speed sensors are configured to generate a corresponding first and second output signal encoding a rotational speed of the first and second rotatable member, respectively; and a controller in communication with each of the first and second speed sensors; wherein the controller is configured to: calculate a rotation angle for each of the first and second rotatable members using the first and the second output signals from the respective first and second speed sensors; and estimate a torque value in the transmission of the powertrain as a function of the calculated rotation angles and a present gear ratio of the first and second rotatable members as determined via the first and second speed sensors.