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US 11,143,298 B2Granted
Method for operating a vehicle having a torque converter
AssigneeFord Global Technologies, LLC
InventorsFazal Urrahman Syed, William David Treharne, Patrick Soderborg, Sassan Farahmand
Life of this patent
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Abstract
A method for operating a vehicle that includes a torque converter is described. In one example, the method adjusts torque of an electric machine in response to a requested torque converter speed. The requested torque converter speed linearizes torque output of a torque converter so that vehicle wheel torque control may be improved.
Claims20
A vehicle operating method, comprising:
- generating a torque converter speed ratio in response to a torque converter turbine torque request and a measured torque converter turbine speed;
- and
- adjusting a torque of an electric machine via a controller in response to a requested torque converter impeller speed that is based on the torque converter speed ratio.
A vehicle system, comprising:
- an electric machine;
- a torque converter coupled to the electric machine and a step ratio transmission;
- a controller including executable instructions stored in non-transitory memory to cause the controller to generate a torque converter speed ratio from a torque converter map that is referenced via a torque converter turbine torque request and an estimated torque converter turbine speed, and additional instructions to adjust a speed of the electric machine according to the torque converter speed ratio.
A vehicle operating method, comprising:
- generating a torque converter speed ratio in response to a torque converter turbine torque request and a measured torque converter turbine speed;
- adjusting a torque of an electric machine via a controller in response to a requested torque converter impeller speed that is based on the torque converter speed ratio;
- and
- adjusting an engine torque in response to an error between a requested electric energy storage device discharge power and an actual electric energy storage discharge power.
1 more element
Dependencies are inferred from the claim text.