METHODS AND SYSTEMS FOR HYBRID DRIVELINE CONTROL
First Claim
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1. 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.
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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.
20 Citations
20 Claims
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1. A method for operating a driveline, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for operating a driveline, comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A vehicle system, comprising:
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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. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification