Back to results
US 11,691,616 B2Granted
Powertrain torque control method and system
AssigneeFord Global Technologies, LLC
InventorsBader Badreddine, Susan Rebecca Cikanek, Matthew Allan Herrmann
Life of this patent
Estimating the term…
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.
Claims19
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;
- 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;
- and
- comparing the propulsive effort request to a second propulsive effort request, the second propulsive effort request based on the propulsive effort pedal position and vehicle speed.
1 more element
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;
- and
- limiting output of a powertrain that includes the engine to less than a creep torque in response to a propulsive effort request being less than a second propulsive effort request by more than a predetermined amount.
5 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;
- generating a propulsive effort via the powertrain based on the propulsive effort request;
- and
- limiting output of the powertrain to less than a creep torque in response to the propulsive effort request being less than a second propulsive effort request by more than a predetermined amount.
2 more elements
Dependencies are inferred from the claim text.