Vehicle transmission clutch engagement control system
AssigneeFord Global Technologies, LLC
InventorsAlexander Phillip McDonnell, Bradley Dean Riedle, Charles William Suter, Conor Edward Sullivan, Stephen Michael Cicala
Life of this patent
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Abstract
A vehicle includes a transmission having a torque converter, an oncoming clutch, and a controller. The controller is programmed to, in response to a torque of the oncoming clutch exceeding an estimated average by a threshold during an engagement, increase the torque of the oncoming clutch via a feedforward command and adjust the torque of the oncoming clutch via a feedback command to compensate for deviations in the torque generated by the feedforward command during the engagement.
Claims20
A method comprising:
- providing a vehicle transmission having a torque converter and an oncoming clutch;
- and
- in response to an oncoming clutch torque exceeding an estimated average by a threshold during an engagement of the oncoming clutch,
- increasing the oncoming torque clutch via a feedforward command to a desired end of engagement torque, and
- adjusting the oncoming clutch torque via a feedback command to compensate for deviations from the feedforward command.
A vehicle comprising:
- a transmission having a torque converter and an oncoming clutch;
- and
- a controller programmed to, in response to a torque of an oncoming clutch exceeding an estimated average by a threshold during an engagement, increase the torque of the oncoming clutch via a feedforward command and adjust the torque of the oncoming clutch via a feedback command to compensate for deviations in the torque generated by the feedforward command during the engagement.
A vehicle transmission comprising:
- a torque converter;
- an oncoming clutch;
- and
- a controller programmed to, in response to an oncoming clutch toque exceeding an estimated average by a threshold during an engagement, increase the torque of the oncoming clutch based on a difference between estimated real-time and desired end of engagement torques and adjust the torque of the oncoming clutch based on a difference between desired and measured turbine accelerations of the torque converter.
Dependencies are inferred from the claim text.