Adaptive control of motor vehicle powertrain
AssigneeJaguar Land Rover Limited
InventorsPaul Darnell, Elliot Hemes, Stephen Stacey
Life of this patent
Estimating the term…
Abstract
A method and system for blending between different torque maps of a vehicle so that step changes of torque output are avoided as accelerator pedal position is changed. Different blending rates are provided so as to reduce the blending time if driver demand is in the direction of torque change.
Claims20
A method of blending between different characteristics of accelerator position and output torque in a vehicle, the method comprising:
- detecting a first operating mode of a vehicle and applying a source torque characteristic associated with the first operating mode to determine a required output torque and control one or more sources of motive power of the vehicle to provide the required output torque;
- changing to a second operating mode of the vehicle and selecting a target torque characteristic associated with the second operating mode;
- blending, by an electronic control system of the vehicle, the characteristic applied to determine the required output torque and control the one or more sources of motive power of the vehicle to provide the required output torque from the first operating mode source torque characteristic to the second operating mode target torque characteristic at a base blending rate, the blending rate being increased during blending when the position of the accelerator pedal is moved in the direction of torque change due to blending.
A method of blending between different characteristics of accelerator position and output torque in a vehicle, the method comprising:
- detecting a first operating mode of a vehicle and applying a source torque characteristic associated with the first operating mode to determine a required output torque and control one or more sources of motive power of the vehicle to provide the required output torque;
- changing to a second operating mode of the vehicle and selecting a target torque characteristic associated with the second operating mode;
- blending, by an electronic control system of the vehicle, the characteristic applied to determine the required output torque and control the one or more sources of motive power of the vehicle to provide the required output torque from the first operating mode source torque characteristic to the second operating mode target torque characteristic at a base blending rate, the blending rate being reduced during blending when the position of the accelerator pedal is not substantially moved, or is moved oppositely to the direction of torque change due to blending.
An electronic control system of a vehicle for blending between different characteristics of accelerator pedal position and output torque by reference to a plurality of torque characteristics held within a memory, the system being configured to:
- detect a first operating mode of the vehicle and apply a source torque characteristic associated with the first operating mode to determine a required output torque and control one or more sources of motive power of the vehicle to provide the required output torque;
- detect a change in the operating mode of the vehicle from the first operating mode to a second operating mode, and select a target torque characteristic associated with the second operating mode;
- and
- blend the torque characteristic applied to determine the required output torque and control the one or more sources of motive power of the vehicle to provide the required output torque from the first operating mode source torque characteristic to the second operating mode target torque characteristic at a base blending rate, the base blending rate being increased during blending when the torque change due to blending is in the direction of driver demand.
An electronic control system of a vehicle for blending between different characteristics of accelerator pedal position and output torque by reference to a plurality of torque characteristics held within a memory, the system being configured to:
- detect a first operating mode of the vehicle and apply a source torque characteristic associated with the first operating mode to determine a required output torque and control one or more sources of motive power of the vehicle to provide the required output torque;
- detect a change in the operating mode of the vehicle from the first operating mode to a second operating mode, and select a target torque characteristic associated with the second operating mode;
- and
- blend the torque characteristic applied to determine the required output torque and control the one or more sources of motive power of the vehicle to provide the required output torque from the first operating mode source torque characteristic to the second operating mode target torque characteristic at a base blending rate, the base blending rate being reduced during blending when the torque change due to blending is not in the direction of driver demand.
Dependencies are inferred from the claim text.