Abstract
Argonne National Laboratory has analyzed the control behavior of advanced vehicles, such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs), to develop simulation models and to reproduce the performance of vehicles with simulation techniques. Since many of the novel and advanced studies about transportation technologies done at Argonne use these simulation techniques, they must be well-validated to conduct and support these studies. To improve its research ability, Argonne built a new testing facility that can test vehicles under different thermal conditions (e.g., –7°C or 35°C), and it has analyzed the controls and performance of several advanced vehicles under these conditions. Further, Argonne has used the analyzed results to develop thermal component models that reproduce the thermal behavior of the vehicles. A main reason to develop thermal models is that the thermal conditions have such a significantly large impact on vehicle performance, especially with regard to advanced vehicles like HEVs or PHEVs. For instance, engine and battery efficiencies must decrease at low temperatures since the battery might not be able to provide enough power if it is very cold. Moreover, the climate control system still has a great demand for additional energy under very cold weather conditions even if the engine is not operating at all. The test data obtained from Argonne’s Advanced Powertrain Research Facility (APRF) are analyzed in order to understand the thermal impacts on controls and performance, and the thermal models are developed based on the analyzed results and validated with the test data. In comparative studies, the simulation models have been found to reproduce fuel consumption that is very close to the fuel consumption obtained from the tests.
Highlights
Electrified vehicles such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs) are able to save fossil fuels by optimizing the engine’s operations, recuperating the braking energy, or using electric energy instead of the fuel
The results show that electrified vehicles consume a lot of fuel or electricity in cold ambient temperature tests (–7oC): almost twice as much as they use in normal ambient temperature tests (21oC)
The increase in energy consumption is caused by the heat load demand from the passenger compartment or by the low efficiency of the engine’s operations; the increase is so significantly large that the new test procedures published by U.S Environmental Protection Agency (EPA) include additional tests under cold and hot ambient conditions for the fuel economy labels of vehicles produced in 2008 or later
Summary
Electrified vehicles such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs) are able to save fossil fuels by optimizing the engine’s operations, recuperating the braking energy, or using electric energy instead of the fuel. The increase in energy consumption is caused by the heat load demand from the passenger compartment or by the low efficiency of the engine’s operations; the increase is so significantly large that the new test procedures published by U.S Environmental Protection Agency (EPA) include additional tests under cold and hot ambient conditions for the fuel economy labels of vehicles produced in 2008 or later. Argonne has been adding value by improving the model’s fidelity, and one ongoing effort is to develop the vehicle’s thermal management system [1] This brief provides information about the entire process — conducting the tests, analyzing the test data, and developing the vehicle model — so that the process can be used in other studies
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
