Patent ID: 8140230

Claim:
A method for regulating active damping in a vehicle powertrain having at least one torque-generative device, the method comprising: providing a controller having a processor configured for: monitoring a damping torque command sent to the at least one torque-generative device over a time period; determining a mean reference point of the damping torque command over the time period; determining if a value of said damping torque command switches about said mean reference point; determining if a switch magnitude exceeds a predetermined switch magnitude minimum if said damping torque command value switched about said mean reference point; increasing a total number of switches if said switch magnitude exceeds said predetermined switch magnitude minimum; determining if said total number of switches exceeds a switch counter threshold; determining if a current damping torque exceeds a predetermined damping torque threshold if said total number of switches exceeds said switch counter threshold; and decreasing said damping torque command if said current damping torque exceeds said predetermined damping torque threshold.