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US 2022/0063592 A1Published application
Powertrain torque control method and system
AssigneeFord Global Technologies, LLC
InventorsBader Badreddine, Susan Rebecca Cikanek, Matthew Allan Herrmann
Life of this patent
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Abstract
Methods and systems are provided for improving torque control of a vehicle that includes simulated shifting of a step gear ratio transmission. In one example, a propulsive effort request is gradually incrementally increased or decreased to provide a smooth torque transition, thereby providing a smoother vehicle speed change and improve vehicle drivability.
Claims20
A method for operating a vehicle, comprising:
- simulating gear shifting of a step gear ratio transmission in a powertrain that includes a continuously variable transmission and that does not include stepped gear ratios;
- and
- adjusting a propulsive effort request to change from a first value to a second value via a plurality of incremental changes while a propulsive effort pedal position is substantially constant in response to the simulated gear shifting.
A vehicle system, comprising:
- an engine;
- a continuously variable transmission coupled to the engine;
- a gear selector;
- and
- a controller with computer readable instructions stored on non-transitory memory that when executed cause the controller to:
- gradually change a propulsive effort request from a first value to a second value while a propulsive effort pedal position is substantially constant, the first value based on a powertrain simulating engagement of a first transmission gear, the second value based on the powertrain simulating engagement of a second transmission gear.
3 more elements
A method for operating a vehicle, comprising:
- simulating gear shifting of a step gear ratio transmission in a powertrain that includes a continuously variable transmission and that does not include stepped gear ratios via a controller in response to a position of a shift lever or input from a paddle shifter to the controller;
- adjusting a propulsive effort request to change from a first value to a second value via a plurality of incremental changes while a propulsive effort pedal position is substantially constant in response to the simulated gear shifting, where the first value is based on a simulated first gear, and where the second value is based on a simulated second gear;
- and
- generating a propulsive effort via the powertrain based on the propulsive effort request.
1 more element
Dependencies are inferred from the claim text.