Patent ID: 8793057
Filing Date: 2014-07-29
Classification: B60W,F16D

Abstract:
1. A method for controlling a subject vehicle driveline, comprising: (a) empirically determining upper and lower magnitudes of first estimated driveline twist due a range of applied torque; (b) a controller using a difference between two spaced locations in the subject vehicle driveline to determine driveline twist speed due to applied torque; (c) the controller using a product of driveline twist speed and a sampling interval to produce a second estimated driveline twist as a sum of incremental changes in driveline twist that are between said upper and lower magnitudes; (d) using the first estimated driveline twist to control, via the controller, driveline torque in the subject vehicle, provided driveline torque is negative and has a magnitude indicating that a lash event is remote; (e) using the second estimated driveline twist to control, via the controller, driveline torque in the subject vehicle, provided driveline torque has a magnitude indicating that a lash event is imminent; and (f) using the first estimated driveline twist to control, via the controller, driveline torque in the subject vehicle, provided driveline torque is positive and has a magnitude indicating that a lash event is remote.