Method for synchronization control of rapid connect AWD systems
AssigneeDana Automotive Systems Group, LLC
InventorsStijn Goossens, Mark R. J. Versteyhe, Thomas J. Vyncke
Life of this patent
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Abstract
A method of controlling an all-wheel-drive system connect event including providing a power transmission apparatus having a clutch, a propeller shaft, and a rear drive unit with a clutch pack assembly. The rear drive unit clutch pack is actuated by creating a model of the propeller shaft rotational speed, adapting the model parameters to compensate for temperature and vehicle wheel speed, storing the model, adapting the model utilizing information collected during a previous all-wheel-drive system connect event, and developing a set point for the clutch driving element utilizing the model and a multi-loop control architecture. The power transmission apparatus clutch is then engaged.
Claims8
A method for controlling a vehicle all-wheel-drive system connect event, which comprises:
- providing a portion of a vehicle driveline including:
- a power transmission apparatus having a clutch,
- a propeller shaft selectively driveably coupled with said power transmission apparatus,
- a rear drive unit including a clutch pack assembly, wherein said rear drive unit is selectively driveably coupled with said propeller shaft, and
- actuating said clutch pack assembly of said rear drive unit, wherein said actuation comprises:
- creating a control system that represents a relationship between a clutch torque and a clutch-actuation-motor position,
- inputting a parameter of said propeller shaft into said control system that represents said relationship between said clutch torque and said clutch-actuation-motor position;
- storing said control system that represents said relationship between said clutch torque and said clutch-actuation-motor position in a vehicle system,
- utilizing information from a completed clutch actuation event to update said control system that represents said relationship between said clutch torque and said clutch-actuation-motor position,
- outputting a clutch driving element set point utilizing said control system that represents said relationship between said clutch torque and said clutch-actuation-motor position, and
- engaging said clutch of said power transmission apparatus.
Dependencies are inferred from the claim text.