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An Illustrative Look at Energy Flow through Hybrid Powertrains for Design and Analysis
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2015 by SAE International in United States
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Improving fuel economy and overall vehicle emissions are very important in today's society with strict new regulations throughout the world. To help in the education process for the next generation of design engineers, this paper seeks to define a powertrain model created and developed to help users understand the basics behind hybrid vehicles and the effects of these advanced technologies.
One of the main goals of this research is to maintain a simplified approach to model development. The 1 Hz model described within this work aims to allow energy to be simply and understandably traced through a hybrid powertrain. Through the use of a “backwards” energy tracking method, demand for a drive cycle is found, and, after tracing the energy demand through each powertrain component, the resulting fuel to meet vehicle demand and associated powertrain losses is found. Various energy management strategies are developed and explained including controls for regenerative braking, Battery Electric Vehicles (BEV), and Thermostatic and Load-following Series Hybrid Electric Vehicles (SHEV). These strategies can be easily compared and manipulated to understand the tradeoffs and limitations of each.
After validating this model, several studies are completed, including looking at a parameter known as Power Split Fraction (PSF) and how it affects overall powertrain efficiency. Since the goal with advanced vehicle powertrains is to increase overall system efficiency and reduce overall energy consumption, it is important to understand how all of the factors involved affect the system as a whole. Overall, this work seeks to provide an educational tool and aid in the development of the automotive engineers of tomorrow.
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CitationWhite, E., Nelson, D., and Manning, P., "An Illustrative Look at Energy Flow through Hybrid Powertrains for Design and Analysis," SAE Technical Paper 2015-01-1231, 2015, https://doi.org/10.4271/2015-01-1231.
- U.S. Product Supplied for Crude Oil and Petroleum Products U.S. Energy Information Administration 03 March 2014 18 March 2014 http://www.eia.gov/dnav/pet/pet_cons_psup_dc_nus_mbbl_a.htm
- U.S. Environmental Protection Agency Office of Transportation and Air Quality 2013 Fast Fact: U.S. Transportation SectorGreenhouse Gas Emissions 1990-2011 EPA-420-F-13-033a
- Autonomie Argonne National Laboratory Mar. 2012 http://www.autonomie.net/
- Ord , D. , White , E. , Manning , P. , Khare , A. , Shoults , L. , and Nelson D. 2014 Powertrain Design to Meet Performance and Energy Consumption Goals for EcoCAR 3 SAE Technical Paper 2014-01-1915 2014 10.4271/2014-01-1915
- Alley , Robert Jesse 2012 VTool: A Method for Predicting and Understanding the Energy Flow and Losses in Advanced Vehicle Powertrains MS Thesis in Mechanical Engineering VPI&SU Blacksburg, VA
- White Eli 2014 An Illustrative Look at Energy Flow through Hybrid Powertrains for Design and Analysis MS Thesis in Mechanical Engineering VPI&SU Blacksburg, VA
- Rask , E. , Santini , D. , and Lohse-Busch , H. Analysis of Input Power, Energy Availability, and Efficiency during Deceleration for X-EV Vehicles SAE Int. J. Alt. Power. 2 2 350 361 2013 10.4271/2013-01-1473
- Wang Q. , Liang , W. , Kuang , M. , and McGee , R. Vehicle System Controls for a Series Hybrid Powertrain SAE Technical Paper 2011-01-0860 2011 10.4271/2011-01-0860