Method for predicting an operator torque request of a hybrid powertrain system
First Claim
1. Method for controlling a powertrain system including an engine and an electric machine mechanically coupled to an electro-mechanical transmission to transfer power to an output member, the method comprising:
- monitoring an accelerator pedal position;
monitoring speed of the output member;
determining an acceleration of the output member;
determining a future time instant comprising a point in time after a predetermined elapsed time interval from a present time, the predetermined elapsed time interval comprising an elapsed time for executing a control scheme associated with controlling the powertrain;
predicting the accelerator pedal position for the future time instant based upon a filtered accelerator pedal position and a time-based derivative of the accelerator pedal position;
predicting the speed of an output member for the future time instant based upon the speed and the acceleration of the output member; and
predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant.
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Accused Products
Abstract
A method for controlling a hybrid powertrain system based upon a predicted speed of an output member, a predicted operator torque request, and a predicted accelerator pedal position is disclosed. The method comprises predicting the accelerator pedal position based upon a monitored accelerator pedal position and a filtered accelerator pedal position, predicting the speed of an output member based upon a monitored speed of the output member, and predicting the operator torque request based upon the predicted speed of the output member and the predicted accelerator position.
208 Citations
20 Claims
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1. Method for controlling a powertrain system including an engine and an electric machine mechanically coupled to an electro-mechanical transmission to transfer power to an output member, the method comprising:
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monitoring an accelerator pedal position; monitoring speed of the output member; determining an acceleration of the output member; determining a future time instant comprising a point in time after a predetermined elapsed time interval from a present time, the predetermined elapsed time interval comprising an elapsed time for executing a control scheme associated with controlling the powertrain; predicting the accelerator pedal position for the future time instant based upon a filtered accelerator pedal position and a time-based derivative of the accelerator pedal position; predicting the speed of an output member for the future time instant based upon the speed and the acceleration of the output member; and predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant. - View Dependent Claims (2, 3, 4, 5, 8, 9)
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6. Method for controlling a powertrain system including an engine and an electric machine mechanically coupled to an electro-mechanical transmission to transfer power to an output member, the method comprising:
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monitoring an accelerator pedal position; monitoring speed of the output member; determining an acceleration of the output member; predicting the accelerator pedal position for a future time instant based upon a filtered accelerator pedal position and a time-based derivative of the accelerator pedal position; predicting the speed of an output member for the future time instant based upon the speed and the acceleration of the output member; and predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant; wherein predicting the accelerator pedal position for the future time instant comprises; calculating a time-based derivative of the accelerator pedal position; multiplying the time-based derivative of the accelerator pedal position and a predetermined elapsed time interval; and combining the filtered accelerator pedal position with the product of the time-based derivative of the accelerator pedal position and the predetermined elapsed time interval. - View Dependent Claims (7)
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10. A method for controlling a powertrain comprising an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines to transmit mechanical power to an output member, the method comprising:
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monitoring an accelerator pedal position; monitoring speed of the output member; determining acceleration of the output member; determining a future time instant comprising a point in time after a predetermined elapsed time interval from a present time, the predetermined elapsed time interval comprising an elapsed time for executing a control scheme associated with controlling the powertrain; filtering the accelerator pedal position; determining a time-based derivative of the accelerator pedal position based upon the filtered accelerator pedal position and an elapsed time period; predicting the accelerator pedal position for the future time instant based upon the filtered accelerator pedal position and the time-based derivative of the accelerator pedal position; predicting the speed of an output member for the future time instant based upon the speed and acceleration of the output member; and predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant. - View Dependent Claims (11, 12, 13, 16)
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14. A method for controlling a powertrain comprising an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines to transmit mechanical power to an output member, the method comprising:
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monitoring an accelerator pedal position; monitoring speed of the output member; determining acceleration of the output member; filtering the accelerator pedal position; determining a time-based derivative of the accelerator pedal position based upon the filtered accelerator pedal position and an elapsed time period; predicting the accelerator pedal position for a future time instant based upon the filtered accelerator pedal position and the time-based derivative of the accelerator pedal position; predicting the speed of an output member for the future time instant based upon the speed and acceleration of the output member; and predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant; wherein predicting the accelerator pedal position for the future time instant comprises; calculating a time-based derivative of the accelerator pedal position; multiplying the time-based derivative of the accelerator pedal position with a predetermined elapsed time interval; and adding the filtered accelerator pedal position with the product of the time-based derivative of the accelerator pedal position and the predetermined elapsed time interval. - View Dependent Claims (15)
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17. A method for controlling an internal combustion engine mechanically-operatively connected to an electro-mechanical transmission, the method comprising:
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monitoring an accelerator pedal position; monitoring speed of the output member; determining acceleration of the output member; determining a future time instant comprising a point in time after a predetermined elapsed time interval from a present time, the predetermined elapsed time interval comprising an elapsed time for executing a control scheme associated with controlling the powertrain; filtering the monitored accelerator pedal position; determining a time-based derivative of the accelerator pedal position based upon the filtered accelerator pedal position and an elapsed time period; predicting the accelerator pedal position for the future time instant based upon the filtered accelerator pedal position and the time-based derivative of the accelerator pedal position; predicting the speed of an output member for the future time instant based upon the monitored speed and acceleration of the output member; and predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant. - View Dependent Claims (18, 20)
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19. A method for controlling an internal combustion engine mechanically-operatively connected to an electro-mechanical transmission, the method comprising:
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monitoring an accelerator pedal position; monitoring speed of the output member; determining acceleration of the output member; filtering the monitored accelerator pedal position; determining a time-based derivative of the accelerator pedal position based upon the filtered accelerator pedal position and an elapsed time period; predicting the accelerator pedal position for a future time instant based upon the filtered accelerator pedal position and the time-based derivative of the accelerator pedal position; predicting the speed of an output member for the future time instant based upon the monitored speed and acceleration of the output member; and predicting an operator torque request for the future time instant based upon the predicted speed of the output member and the predicted accelerator position for the future time instant; wherein the time-based derivative of the accelerator pedal position is a change in the monitored accelerator pedal position over an elapsed time period divided by the elapsed time period, and wherein predicting the accelerator pedal position for the future time instant comprises; calculating a time-based derivative of the accelerator pedal position; multiplying the time-based derivative of the accelerator pedal position with a predetermined elapsed time interval; and combining the filtered accelerator pedal position with the product of the time-based derivative of the accelerator pedal position and the predetermined elapsed time interval.
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Specification