EPA Smartway Verification of Trailer Undercarriage Advanced Aerodynamic Drag Reduction Technology

Wood, Richard M.

doi:10.4271/2012-01-2043

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…Wind tunnel testing indicated that basic aerodynamic improvements, including a roof deflector, trailer side skirts (SS), and tractor-trailer gap reducer to the LHT, can reduce the drag coefficient by 8% at highway speeds [46]. Wood et al [92] focused on estimating the under-body aerodynamic drag reduction by installing SS and wheel cavity cover (WCC). They examined various installation modes for SS and WCC and proved that 5% fuel savings could be achieved for LHTs over the highway.…”

Section: Vehicle Side Technologiesmentioning

confidence: 99%

“…They examined various installation modes for SS and WCC and proved that 5% fuel savings could be achieved for LHTs over the highway. The trailer frontal splitter (vortex generator) has zero impact on fuel consumption, and external side mirrors increase the drag coefficient by 3.23% [92][93][94]. Trailer SS was the most dominant aerodynamic technology in the U.S. prior to 2016 [47].…”

Section: Vehicle Side Technologiesmentioning

confidence: 99%

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Advances in Vehicle and Powertrain Efficiency of Long-Haul Commercial Vehicles: A Review

Balazadeh Meresht,

Moghadasi,

Munshi

et al. 2023

Energies

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Mitigating CO2 emissions from long-haul commercial trucking is a major challenge that must be addressed to achieve substantial reductions in greenhouse gas (GHG) emissions from the transportation sector. Extensive recent research and development programs have shown how significant near-term reductions in GHGs from commercial vehicles can be achieved by combining technological advances. This paper reviews progress in technology for engine efficiency improvements, vehicle resistance and drag reductions, and the introduction of hybrid electric powertrains in long-haul trucks. The results of vehicle demonstration projects by major vehicle manufacturers have shown peak brake thermal efficiency of 55% in heavy-duty diesel engines and have demonstrated freight efficiency improvements of 150% relative to a 2009 baseline in North America. These improvements have been achieved by combining multiple incremental improvements in both engine and vehicle technologies. Powertrain electrification through hybridization has been shown to offer some potential reductions in fuel consumption. These potential benefits depend on the vehicle use, the details of the powertrain design, and the duty cycle. To date, most papers have focused on standard drive cycles, leaving a research gap in how hybrid electric powertrains would be designed to minimize fuel consumption over real-world drive cycles, which are essential for a reliable powertrain design. The results of this paper suggest that there is no “one-size-fits-all” solution to reduce the GHGs in long-haul trucking, and a combination of technologies is required to provide an optimum solution for each application.

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Section: Vehicle Side Technologiesmentioning

confidence: 99%

Section: Vehicle Side Technologiesmentioning

confidence: 99%