METHODS AND SYSTEMS FOR POWERTRAIN OPTIMIZATION AND IMPROVED FUEL ECONOMY
First Claim
1. A method for powertrain optimization and improved fuel economy in a vehicle, the method comprising:
- utilizing a reverse tractive road load demand simulation algorithm to propagate a reverse tractive road load demand and a corresponding component torque and speed, the corresponding component torque and speed derived from a vehicle speed trace in a reverse direction through a powertrain system;
calculating required torque and speed from the vehicle speed trace;
propagating the required torque and speed backwardly though the powertrain system to a vehicle engine; and
controlling the vehicle engine and improving the fuel economy with the determined required engine torque and speed.
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Abstract
The technology described herein provides methods and systems for powertrain optimization and improved fuel economy including multiple displacement engine modeling and control optimization, automotive powertrain matching for fuel economy, cycle-based automotive shift and lock-up scheduling for fuel economy, and engine performance requirements based on vehicle attributes and drive cycle characteristics. Also provided is a reverse tractive road load demand simulation algorithm used to propagate a reverse tractive road load demand and a corresponding component torque and speed, derived from a vehicle speed trace, in a reverse direction through a powertrain system. Also provided is a dynamic optimization algorithm. The dynamic programming algorithm is applied to a matrix of fuel flow rates to find the optimal control path that maximizes the powertrain efficiency over a cycle.
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Citations
30 Claims
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1. A method for powertrain optimization and improved fuel economy in a vehicle, the method comprising:
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utilizing a reverse tractive road load demand simulation algorithm to propagate a reverse tractive road load demand and a corresponding component torque and speed, the corresponding component torque and speed derived from a vehicle speed trace in a reverse direction through a powertrain system; calculating required torque and speed from the vehicle speed trace; propagating the required torque and speed backwardly though the powertrain system to a vehicle engine; and controlling the vehicle engine and improving the fuel economy with the determined required engine torque and speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A control system for powertrain optimization and improved fuel economy in a vehicle, the control system comprising:
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a powertrain system; a reverse tractive road load demand simulation algorithm, in operative communication with the powertrain system, operative to propagate a reverse tractive road load demand and a corresponding component torque and speed, the corresponding component torque and speed derived from a vehicle speed trace, in a reverse direction through the powertrain system; wherein the control system comprises logic configured to, calculate a required torque and speed from the vehicle speed trace, propagate the required torque and speed backwardly though the powertrain system to a vehicle engine, and control the vehicle engine and improving the fuel economy with the determined required engine torque and speed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer readable medium encoded with programming for powertrain optimization and improved fuel economy in a vehicle, the programming configured to:
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utilize a reverse tractive road load demand simulation algorithm, propagate a reverse tractive road load demand and a corresponding component torque and speed, the corresponding component torque and speed derived from a vehicle speed trace, in a reverse direction through a powertrain system, calculate a required torque and speed from the vehicle speed trace, propagate the required torque and speed backwardly though the powertrain system to a vehicle engine, and control the vehicle engine and improving the fuel economy with the determined required engine torque and speed. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification