Adaptive control of motor vehicle powertrain
AssigneeJaguar Land Rover Limited
InventorsPaul Darnell, Elliot Hemes, Mark Roberts
Life of this patent
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Abstract
Embodiments of the present invention provide a vehicle having different operating modes, and for each such mode a different characteristic of output torque and accelerator pedal position. The rise of output torque in response to a propulsion request is more or less delayed according to the instant operating mode. The invention provides for blending of the response to a propulsion request so that the delay is progressively varied between a source and target operating mode.
Claims19
A method of blending between different filters of a propulsion request associated with the motor of a vehicle whereby a response to a propulsion request is more delayed or less delayed according to the operating mode of the vehicle, the method comprising:
- detecting a current operating mode of the vehicle and applying a source filter appropriate to the current operating mode to a propulsion request, wherein the source filter represents a first delay in the response of a powertrain of the vehicle to the propulsion request and delays the moment in time at which the propulsion request is acted on by the powertrain,
- detecting a change of operating mode of the vehicle and selecting a target filter appropriate to the changed operating mode for a propulsion request, wherein the target filter represents a second delay in the response of the vehicle powertrain to the propulsion request and delays the moment in time at which the propulsion request is acted on by the powertrain,
- blending from the source filter to the target filter over time while in the changed operating mode so as to progressively change the delay applied to a propulsion request from the first delay to the second delay, and
- controlling a change in an output torque of the vehicle motor in response to the propulsion request and in accordance with the blending from the source filter to the target filter.
A control system comprising a processor for defining the propulsion applied to a vehicle by controlling blending between different filters of a propulsion request associated with a motor of a vehicle whereby a response to a propulsion request is more delayed or less delayed according to the operating mode of the vehicle, said processor being programmed to detect a current operating mode of the vehicle and apply a source filter appropriate to the current operating mode to a propulsion request, wherein the source filter represents a first delay in the response of a powertrain of the vehicle to the propulsion request and delays the moment in time at which the propulsion request is acted on by the powertrain;
- detect a changed operating mode of the vehicle and select a target filter appropriate to the changed operating mode for a propulsion request, wherein the target filter represents a second delay in the response of the vehicle powertrain to the propulsion request and delays the moment in time at which the propulsion request is acted on by the powertrain;
- blend from the source filter to the target filter over time while in the changed operating mode so as to progressively change the delay applied to a propulsion request from the first delay to the second delay;
- and control a change in an output torque of the vehicle motor in response to the propulsion request and in accordance with the blending from the source filter to the target filter.
Dependencies are inferred from the claim text.