Drive cycle simulation of high efficiency combustions on fuel economy and exhaust properties in light-duty vehicles

Gao, Zhiming; Curran, Scott; Parks, James E.; Smith, D. D.; Wagner, R. M.; Daw, C. Stuart; Edwards, K. Dean; Thomas, John F.

doi:10.1016/j.apenergy.2015.03.070

Cited by 48 publications

(28 citation statements)

References 37 publications

(58 reference statements)

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“…Engineering-based powertrain simulation is one solution. Usually a powertrain simulation tool is built that takes vehicle design, engine control technology, and other vehicle attributes as inputs and estimates fuel efficiency of vehicles (Gao et al, 2015a;Gao et al, 2015b;Chen and Meier, 2016). Several publicly available tools are out there, such as FASTSim, Autonomie (Brook et al, 2015;Halbach et al, 2010;Morrison and Chen, 2011;Chen and Fan, 2014), and some previous studies were conducted using this approach (Vijayagopal and Rousseau, 2011;Moawad et al, 2014;Borken-Kleefeld and Chen, 2015;Chen and Borken-Kleefeld, 2014;Chen and Borken-Kleefeld, 2016).…”

Section: Methodsmentioning

confidence: 99%

Technological growth of fuel efficiency in european automobile market 1975–2015

Chen

2016

Energy Policy

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This paper looks at the technological growth of new car fleet fuel efficiency in the European Union between 1975 and 2015. According to the analysis results, from1975 to 2006 the fuel efficiency technology improvements were largely offset by vehicles' increased weight, engine size, and consumer amenities such as acceleration capacity. After 2006, downsizing in weight and engine capacity was observed in new car fleet, while fuel consumption decreased by 32% between 2006 and 2015. We adopt a statistical method and find that from 1975 to 2015, a 1% increase in weight would result in 0.3 to 0.5% increments in fuel consumption per 100 km, and a 1% reduction in 0-100 km/h acceleration time would increase fuel consumption by about 0.3%. Impacts of other attributes on fuel consumption are also assessed. To meet the European Union's 2021 fuel consumption target, downsizing of cars, as well as at least maintaining fuel efficiency technology growth trend observed between 2005 and 2015, are needed.Government policies on controlling improvement in acceleration performance or promoting alternative fuel vehicles are also important to achieve European Union 2021 target.

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Section: Methodsmentioning

confidence: 99%

Technological growth of fuel efficiency in european automobile market 1975–2015

Chen

2016

Energy Policy

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“…The detailed mass estimations are considered as (based on Li-ion battery), , , and , for power values in units of kW. The coefficients used were obtained from references [35][36][37]. The variables, , , and , represent the peak power for motor, engine and gearbox, respectively.…”

Section: Vehicle and Charging Assumptionsmentioning

confidence: 99%

Battery capacity and recharging needs for electric buses in city transit service

Gao

Lin

LaClair

et al. 2017

Energy

Self Cite

222

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This paper evaluates the energy consumption and battery performance of city transit electric buses operating on real day-today routes and standardized bus drive cycles, based on a developed framework tool that links bus electrification feasibility with real-world vehicle performance, city transit bus service reliability, battery sizing and charging infrastructure. The impacts of battery capacity combined with regular and ultrafast charging over different routes have been analyzed in terms of the ability to maintain city transit bus service reliability like conventional buses. The results show that ultrafast charging via frequent short-time boost charging events, for example at a designated bus stop after completing each circuit of an assigned route, can play a significant role in reducing the battery size and can eliminate the need for longer duration charging events that would cause schedule delays. The analysis presented shows that significant benefits can be realized by employing multiple battery configurations and flexible battery swapping practices in electric buses. These flexible design and use options will allow electric buses to service routes of varying city driving patterns and can therefore enable meaningful reductions to the cost of the vehicle and battery while ensuring service that is as reliable as conventional buses.

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“…44 In design-cycle calculations, single-cylinder simulations are generally coupled loosely to a 0D/1D acoustic model to capture multi-cylinder effects to create engine operating maps that can be feed into fleet-level analysis with appropriate perturbations to capture transient operation. 45,46 There is are multiple of opportunities for impact of exascale computing on combustion research at both the basic and applied level. As with many areas of turbulence research, increasing the Reynolds' number and range of scales that can be simulated will advance discovery science and increase the relevance of the conditions that can be treated with high-fidelity approaches from a turbulence closure standpoint.…”

Section: Iiib Applied Research: Combustionmentioning

confidence: 99%

Outcomes from the DOE Workshop on Turbulent Flow Simulation at the Exascale

Sprague

Boldyrev

Chang

et al. 2016

46th AIAA Fluid Dynamics Conference

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ing Research (ASCR). The workshop objectives were to define and describe the challenges and opportunities that computing at the exascale will bring to turbulent-flow simulations in applied science and technology. The need for accurate simulation of turbulent flows is evident across the DOE applied-science and engineering portfolios, including combustion, plasma physics, nuclear-reactor physics, wind energy, and atmospheric science. The workshop brought together experts in turbulent-flow simulation, computational mathematics, and high-performance computing. Building upon previous ASCR workshops on exascale computing, participants defined a research agenda and path forward that will enable scientists and engineers to continually leverage, engage, and direct advances in computational systems on the path to exascale computing.

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Drive cycle simulation of high efficiency combustions on fuel economy and exhaust properties in light-duty vehicles

Abstract: public-access-plan). *Revised Manuscript with No Changes Marked Click here to download Revised Manuscript with No Changes Marked: AEJ_revision_R2_notmarked_03_2015.docx

Cited by 48 publications

References 37 publications

Technological growth of fuel efficiency in european automobile market 1975–2015

Technological growth of fuel efficiency in european automobile market 1975–2015

Battery capacity and recharging needs for electric buses in city transit service

Outcomes from the DOE Workshop on Turbulent Flow Simulation at the Exascale

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