Methods and systems for hybrid driveline control
AssigneeFord Global Technologies, LLC
InventorsXiaoyong Wang, Wei Liang, Rajit Johri, Francis Thomas Connolly, Daniel Colvin, Ming Lang Kuang, Ryan Abraham McGee
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Abstract
Systems and methods for operating and hybrid driveline are presented. In one example, driver demand torque may be supplied to vehicle wheels via a hydraulic torque path and a friction torque path. Torque is distributed between the friction torque path and the hydraulic torque path in a way that ensures that driver demand torque is met and the friction torque path transfers torque up to its capacity.
Claims20
A method for operating a driveline, comprising:
- operating an electric machine in a torque control mode in response to a torque converter clutch torque capacity available at a transmission line pressure being greater than a driver demand torque;
- and
- operating the electric machine in a speed control mode in response to the torque converter clutch torque capacity available at the transmission line pressure being less than the driver demand torque.
A method for operating a driveline, comprising:
- adjusting a torque converter clutch to transfer a first portion of a driver demand torque to vehicle wheels;
- and
- adjusting speed of a torque converter impeller in response to a difference in the driver demand torque and the first portion of the driver demand torque.
A vehicle system, comprising:
- an electric machine;
- a torque converter in mechanical communication with the electric machine, the torque converter including a torque converter clutch;
- and
- a controller including non-transitory instructions executable to schedule torque converter clutch torque transfer capacity in response to a driver demand torque and a transmission line pressure.
Dependencies are inferred from the claim text.