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Modeling and Validation of Power-split and P2 Parallel Hybrid Electric Vehicles SAE 2013-01-1470)
Citation:
Modeling and Validation of Power-split and P2 Parallel Hybrid Electric Vehicles SAE 2013-01-1470). SAE - SOCIETY OF AUTOMOTIVE ENGINEERS. SAE International, Warrendale, PA.
Impact/Purpose:
Supports the Upcoming Mid-term Evaluation of the Light-duty GHG Rule
Description:
The Advanced Light-Duty Powertrain and Hybrid Analysis tool was created by EPA to evaluate the Greenhouse Gas (GHG) emissions of Light-Duty (LD) vehicles. It is a physics-based, forward-looking, full vehicle computer simulator capable of analyzing various vehicle types combined with different powertrain technologies. The software tool is a freely-distributed, MATLAB/Simulink-based desktop application. Version 1.0 of the ALPHA tool was applicable only to conventional, non-hybrid vehicles and was used to evaluate off-cycle technology such as air-conditioning, electrical load reduction technology and road load reduction technologies for the 2017-2025 LD GHG rule. The next version of the ALPHA tool extends its modeling capabilities to include power-split and P2 parallel hybrid electric vehicles and their battery pack energy storage systems. Future versions of ALPHA will incorporate plug-in hybrid electric vehicle (PHEV) and electric vehicle (EV) architectures. This paper presents the power-split and P2 parallel hybrid electric vehicle models, which will eventually integrated into ALPHA. A power-split hybrid electric vehicle consists of two electric motors, an internal combustion engine and a traction battery system. The power-split HEV architecture is widely used in light duty cars like the Toyota Prius and Ford Fusion hybrid. P2 parallel hybrid vehicle configurations can be found in the Hyundai Sonata hybrid and VW Jetta hybrid. These systems use a small traction motor, transmission, engine and battery system. This paper presents power-split and P2 parallel hybrid electric vehicle model as well as controls development and validation that will be integrated into the ALPHA tool. The power-split and P2 parallel hybrid vehicle models were validated with 2010 Toyota Prius and 2011 Hyundai Sonata Hybrid vehicle data obtained from chassis dynamometer tests. The simulated fuel economy, engine torque/speed, motor torque/speed, engine on-off controls, battery voltage, current, and State of Charge (SOC) were in an excellent agreement with the vehicle test data on a number of drive schedules.
