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Showing 1 to 7 of 7 for “"Willans Line"”.
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Willans Line Modeling for Powertrain Analysis and Energy Consumption of Electric Vehicles
… work focuses on utilizing the well-established Willans line approximation and proposes a simplified modeling method to determine electric vehicle energy consumption and powertrain efficiency. First, a backwards physics-based model is applied to determine tractive effort at the wheel to meet US …
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Willans Line Based Equivalent Consumption Minimization Strategy for Charge Sustaining Hybrid Electric Vehicle
… strategy to meet charge sustaining performance. Willans line models quantify the input power to output power relationship for powertrain and drivetrain components with a linear relationship and a constant offset. The hybrid electric vehicle model performance is characterized using three Willans …
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Unified Net Willans Line Model for Estimating the Energy Consumption of Battery Electric Vehicles
… weight and performance to obtain a unified net Willans line to describe the input/output power through a linear relationship. A base model and three normalized models are developed by fitting the UDDS and HWFET energy consumption test data published by the EPA for all BEVs in the U.S. market. …
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Development of a Parallel Hybrid Energy Management Strategy with Consideration of Drive Quality and State of Charge Dynamics
… speed error and SAE J2951 parameters. A combined Willans line model is proposed for the engine and transmission, with control modes based on efficiency-derived power thresholds. Algorithms are proposed for battery state of charge (SOC) management including engine loading and one pedal strategies. …
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Development and Testing of a Hybrid Vehicle Energy Management Strategy
… control strategy. To improve fuel efficiency, a Willans line model is developed for the conventional powertrain and used to develop a rule-based torque split strategy. The strategy maximizes high efficiency engine operation while reducing round trip losses. Calibratable parameters for the torque …
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Analysis and Design of Stable and Optimal Energy Management Strategies for Hybrid Electric Vehicles
… management problem iscast in the form of a nonlinear optimal regulation (with disturbance rejection) problem and a control Lyapunov function is used to design the control law. A series of theorems ensuringoptimality and asymptotic stability of the energy management strategy are proposed and …
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Energy Modeling of Deceleration Strategies for Electric Vehicles
… based on speed and acceleration. Bidirectional Willans lines are the basis of the powertrain model simulating battery energy consumption. Regen braking tractive and powertrain power are modeled backward from prescribed linear velocity curves, and the coasting trajectory is forward modeled given …