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Active ECUs (Electronic Control Unit) in a hybrid car while it is charging leads to inefficient power usage and reduction in ECU lifetime. To solve this issue, AUTOSAR has suggested PN (partial networking). As per the AUTOSAR specification, ECUs which are not required to be kept active during battery charging must be shutdown. This project's aim is to analyze the robustness of the design suggested...
To develop a control strategy for a vehicle, the most important factors are to minimize the cost in terms of time and resources, and availability of a risk-free test environment to test new strategies. This paper presents the strategy for developing control-based models for a plug-in hybrid vehicle. The resulting vehicle model will allow development of advanced supervisory control strategies for the...
Stochastic dynamic programming (SDP) is applied to the optimal control of a hybrid electric vehicle in a concerted attempt to deploy and evaluate such a controller in the real world. Practical considerations for robust implementation of the SDP algorithm are addressed, such as the choice of discount factor used and how charge sustaining characteristics of the SDP controller can be examined and adjusted...
The operation of electric vehicles in cold weather is a concern, but the precise nature of the impact on travel range and energy consumption is not well characterized. The Chevrolet Volt, a commercially-available plug-in hybrid electric vehicle (PHEV) was driven-to-depletion across a broad range of temperatures as occur naturally in Winnipeg, Canada, due to its climate. Results conform to a simple...
Vehicle hybridization offers the opportunity to eliminate conventional engine starters in favor of e-motor engine start, i.e. using the hybrid's electric traction motor, ‘e-motor’, to start the engine. The advantages of e-motor engine start are many: 1) A freight efficiency gain of about 1% can be achieved by eliminating the starter and extra Pb-acid battery weight in a heavy-duty vehicle† 2) Less...
System simulation and hardware component in the loop are key steps in the model-based system engineering (MBSE) process that seeks to shorten the development time of advanced powertrain technologies. Battery Component in the Loop (BCIL), also commonly abbreviated as Battery in the Loop (BIL), is an important step in the evaluation of advanced prototype batteries for electrified vehicles. This paper...
Global automakers are accelerating the development of fuel efficient vehicles, as a part of meeting regional regulatory CO2 emissions requirements. The micro hybrid vehicles with auto start-stop functionality are considered economical solutions for the stringent European regulations. Flooded lead acid batteries were initially considered the most economical solution for idle-stop systems. However,...
This paper describes work directed toward the demonstration of ultracapacitors in a 2001 Honda Insight. The general approach used in this project is to replace the NMH battery with ultracapacitor modules maintaining the 12V lead-acid battery to power the accessories. Both the ultracapacitors and the 12V battery will be recharged from the electric motor/generator driven by the engine. The Insight is...
As a selected participant in the EcoCAR2: Plugging In to the Future competition, headline sponsored by General Motors and the US Department of Energy, the Rose-Hulman team has completed the second year of a three year design cycle. This paper focuses on the supervisory control system design completed during year one of the competition including plant model development, control system hardware architecture,...
Southern California Edison (SCE) is an electric utility focused on providing clean, safe, reliable and efficient power to its customers. SCE is also active in improving vehicle fleet efficiency to reduce petroleum use and emissions. The Electric Vehicle Technical Center (EVTC) is operated by SCE for evaluation of electric and alternate fuel propulsion and energy storage systems for vehicles and fleet...
In collaboration with the Department of Energy's Advanced Vehicle Testing Activity, Argonne National Laboratory performs dynamometer testing and evaluation for a wide array of advanced vehicles. Using data obtained from this benchmarking, this paper discusses recently observed trends in hybrid electric vehicle technologies, discussing both overall vehicle trends as well as select component trends...
Two different types of heavy-duty hybrid vehicles had been tested by portable emission measure system (PEMS). Analyzed the two hybrid vehiclespsila emission characteristics under different modes by cycle classification method and provided technical support to hybrid vehiclepsilas control strategy. The results showed that the two hybrid vehiclespsila tracking correlation coefficient (R2) were both...
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