Vehicle drive control for 4×4 mode
AssigneeFord Global Technologies, LLC
InventorsDavid Karl Bidner, Dennis Allen Light, Michael John Cullen, Ralph Wayne Cunningham, Richard John Hippley
Life of this patent
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Abstract
Method and electronic control system using a unique driver demand (calibration) table stored in system memory to provide torque output values specific to a 4×4 mode of operation of the vehicle drive unit. For example, the torque output of the electronic control system for a 4×4 low mode of operation is controlled using a unique calibration table stored in system memory for 4×4 low mode of operation, while the torque output of the electronic control system for other modes of operation is controlled using one or more different, other calibration tables stored in system memory.
Claims11
A method of controlling a vehicle drive having a 4×4 mode of operation and other modes of operation using an electronic control system providing a torque output in response to driver demand, comprising:
- controlling torque output of one of an engine and transmission of said vehicle when the vehicle is in the 4×4 mode using a calibration table stored in system memory and indicating a relationship of torque output as a function of accelerator pedal position and a speed parameter for reducing sensitivity of the torque output to accelerator pedal position in the 4×4 mode of operation, and
- controlling torque output of one of the engine and the transmission of said vehicle when said vehicle is in one of the other modes of operation using a different calibration table stored in system memory and indicating a different relationship of torque output as a function of the accelerator pedal position and the speed parameter.
A method of controlling a vehicle drive having a 4×4 low mode of operation and other modes operation using an electronic control system providing a torque output in response to driver demand, comprising:
- controlling torque output of one of an engine and transmission of said vehicle when the vehicle is in the 4×4 low mode using a calibration table stored in system memory and indicating a relationship of torque output as a function of accelerator pedal position and a speed parameter for reducing sensitivity of torque output to accelerator pedal position in the 4×4 low mode of operation, and
- controlling torque output of one of the engine and the transmission of said vehicle when said vehicle is in one of the other modes of operation using a different calibration table stored in system memory and indicating a different relationship of torque output as a function of the accelerator pedal position and the speed parameter.
An electronic control system for a vehicle drive providing a torque output in response to driver demand, comprising:
- a calibration table stored in system memory for controlling torque output of one of an engine and transmission of said vehicle for a 4×4 mode of the vehicle drive and indicating a relationship of torque output as a function of accelerator pedal position and a speed parameter for reducing sensitivity of torque output to accelerator pedal position in the 4×4 mode of operation, and,
- a different calibration table stored in system memory for controlling torque output of one of the engine and the transmission of said vehicle for another mode of operation of the vehicle drive and indicating a different relationship of torque output as a function of the accelerator pedal position and the speed parameter.
Dependencies are inferred from the claim text.