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US 11,077,856 B2Granted
Methods and system for adapting operation of a transmission clutch
AssigneeFord Global Technologies, LLC
InventorsJaewon Choi, Jianping Zhang, Steve Michael Cicala, Kendrick Morrison, Kurt Howard Nickerson
Life of this patent
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Abstract
Systems and methods for operating a vehicle that includes an engine and an electric machine are described. In one example, an actual total number of transmission gear downshifts are counted to determine whether or not a transmission clutch characterization is immature. The transmission clutch characterization may be adjusted if it is determined to be immature.
Claims9
A powertrain operating method, comprising:
- adjusting a torque threshold of an electric machine via a controller in response to a value of a clutch adaption counter being greater than a threshold;
- adjusting a relationship between transmission clutch pressure and transmission clutch torque capacity via the controller in response to the value of the clutch adaption counter being greater than the threshold;
- and
- applying or releasing a transmission clutch responsive to the relationship between transmission clutch pressure and transmission clutch torque capacity.
1 more element
A system, comprising:
- an engine in a hybrid vehicle driveline;
- an electric machine in the hybrid vehicle driveline;
- a rotation ratio changing device positioned in a driveline between the engine and the electric machine;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to adjust a torque threshold of the electric machine via the controller in response a value of a clutch adaption counter being greater than a threshold, and additional instructions that cause the controller to adjust the torque threshold of the electric machine in response to a vehicle traveling less than a threshold distance.
2 more elements
Dependencies are inferred from the claim text.