SYSTEM AND METHOD FOR OBTAINING AN ADJUSTABLE ACCELERATOR PEDAL RESPONSE IN A VEHICLE POWERTRAIN
First Claim
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1. A method for controlling a power plant in a vehicle powertrain having a driver-operated vehicle accelerator pedal whereby vehicle wheel torque can be commanded by the vehicle driver, the method comprising:
- adjusting the accelerator pedal to develop an accelerator pedal position signal;
selecting a transfer function shaping parameter;
monitoring vehicle speed;
developing a pedal position signal using a pedal position to pedal position signal transfer function shaped by the selected shaping parameter; and
developing a vehicle wheel torque request based upon a pre-calibrated functional relationship between vehicle speed and vehicle wheel torque for a given pedal position signal.
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Abstract
The disclosed system and method changes a traction torque request in a vehicle powertrain with a driver-controlled vehicle accelerator pedal. A desired transfer function parameter in a powertrain control module is chosen by the driver to obtain a desired functional relationship between a traction torque request or a power plant torque request and accelerator pedal position.
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Citations
17 Claims
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1. A method for controlling a power plant in a vehicle powertrain having a driver-operated vehicle accelerator pedal whereby vehicle wheel torque can be commanded by the vehicle driver, the method comprising:
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adjusting the accelerator pedal to develop an accelerator pedal position signal; selecting a transfer function shaping parameter; monitoring vehicle speed; developing a pedal position signal using a pedal position to pedal position signal transfer function shaped by the selected shaping parameter; and developing a vehicle wheel torque request based upon a pre-calibrated functional relationship between vehicle speed and vehicle wheel torque for a given pedal position signal. - View Dependent Claims (2)
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3. A control system for controlling a power plant in a vehicle powertrain having a driver-operated vehicle accelerator pedal for commanding vehicle wheel torque by the vehicle driver, the system comprising:
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an accelerator pedal position sensor connected to the accelerator pedal for developing an accelerator position signal; a power plant controller; a first control module of the power plant controller being configured with a transfer function for converting accelerator position signals to pedal count electrical voltage pulses; a second control module of the power plant controller in electrical communication with the first control module; a vehicle speed sensor for developing a vehicle speed signal; the second control module being configured with processor memory registers in which there resides an accelerator pedal map of at least one functional relationship between wheel torque and vehicle speed for a given number of pedal count electrical voltage pulses; and a vehicle driver operated selector for selecting one of multiple shaping parameters for the transfer function whereby a wheel torque request following an accelerator pedal position change is modified. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling a vehicle power plant in a vehicle powertrain having a driver-operated vehicle accelerator pedal whereby vehicle power plant torque can be commanded by the vehicle driver, the method comprising:
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adjusting the accelerator pedal to develop an accelerator pedal position signal; selecting a transfer function shaping parameter; monitoring power plant speed; developing a pedal position signal using a pedal position to pedal position signal transfer function shaped by the selected shaping parameter; and developing a vehicle power plant torque request based upon a pre-calibrated functional relationship between power plant speed and power plant torque for a given pedal position signal. - View Dependent Claims (15)
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16. A control system for controlling a power plant in a vehicle powertrain having a driver-operated vehicle accelerator pedal for commanding vehicle power plant torque by the vehicle driver, the system comprising:
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an accelerator pedal position sensor connected to the accelerator pedal for developing an accelerator position signal; a power plant controller; a first control module of the power plant controller being configured with a transfer function for converting accelerator position signals to pedal count electrical voltage pulses; a second control module of the power plant controller in electrical communication with the first control module; a vehicle power plant speed sensor for developing a power plant speed signal; the second control module being configured with processor memory registers in which there resides an accelerator pedal map of at least one functional relationship between power plant torque and vehicle power plant speed for a given number of pedal count electrical voltage pulses; and a vehicle driver operated selector for selecting one of multiple shaping parameters for the transfer function whereby a power plant torque request following an accelerator pedal position change is modified. - View Dependent Claims (17)
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Specification