Adaptive clutch torque control for a powershift transmission
AssigneeFord Global Technologies, LLC
InventorHong Jiang
Life of this patent
Estimating the term…
Abstract
A method for controlling an input clutch of a vehicle transmission that includes an output driveably connected to the input clutch includes increasing the torque capacity of the input clutch, determining a reference acceleration of the output, determining a current acceleration of the output after the reference acceleration is determined, if a difference between the reference acceleration of the output and the current acceleration of the output is equal to or greater than a reference change in acceleration of the output, determining a desired input clutch torque, and adjusting the input clutch to produce the desired input clutch torque.
Claims21
A method for controlling an input clutch of a vehicle transmission that includes an output driveably connected to the input clutch, comprising the steps of:
- (a) increasing a torque capacity of the input clutch to an initial torque;
- (b) determining a reference acceleration of the output;
- (c) using the reference acceleration of the output to determine a reference input clutch torque;
- (d) determining a current acceleration of the output after the reference acceleration is determined;
- (e) using the current acceleration of the output, the reference acceleration of the output and the reference input clutch torque to determine an estimated input clutch torque;
- and
- (f) adjusting the input clutch to produce the estimated input clutch torque.
A method for controlling an input clutch of a vehicle transmission that includes an output driveably connected to the input clutch, comprising the steps of:
- (a) increasing a torque capacity of the input clutch to an initial torque;
- (b) determining a reference acceleration of the output;
- (c) determining a current acceleration of the output after the reference acceleration is determined;
- (d) if a difference between the reference acceleration of the output and the current acceleration of the output is equal to or greater than a reference change in acceleration of the output, determining a desired input clutch torque;
- and
- (e) adjusting the input clutch to produce the desired input clutch torque.
A method for controlling an input clutch during a gear shift of a vehicle transmission that includes gearing and an output that is driveably connectable to an off-going input clutch and an on-coming input clutch, comprising the steps of:
- (a) increasing a torque capacity of the on-coming input clutch and decreasing a torque capacity of the off-going input clutch;
- (b) determining at frequent intervals a current acceleration of the output;
- (c) determining a desired clutch torque of the on-coming input clutch using the current acceleration of the output;
- and
- (d) adjusting the on-coming input clutch to produce the desired clutch torque.
Dependencies are inferred from the claim text.