The Stretch for Better Passenger-Car Fuel Economy

Amann, Charles A.

doi:10.4271/972658

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…Most studies analysing the benefits of alternative powertrains have compared only one of the alternatives with the I I conventional powertrain. When comparing powertrains using the same energy carrier (petrol) there is no need to consider the primary energy efficiency (see, for example, Cuddy and Wipke, 1997;Amann, 1998; comparing HEVs with ICEVs, focusing on fuel economy). When different energy carriers with different losses in fuel production and distribution are used, analysing the energy losses all the way from the well to the wheel becomes necessary (see, for example, DeLuchi and Ogden, 1993;Ecotraffic, 1992;Wang and DeLuchi, 1992).…”

Section: Powertrain Efficiencymentioning

confidence: 99%

“…Further improvements in energy efficiency can also be made by reducing road loads, in addition to increasing powertrain efficiency. Road loads are comprised of approximately one-third each of aerodynamic drag resistance (friction from air proportional to speed squared), rolling resistance (friction between the wheels and the ground proportional to speed), and kinetic energy, being mainly energy losses from braking proportional to speed squared and a function of the driving cycle (see, for example, Amann, 1998;DeCicco and Ross, 1993).…”

Section: Powertrain Efficiencymentioning

confidence: 99%

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Cars and fuels for tomorrow: a comparative assessment

Åhman

Nilsson

Johansson

2001

Natural Resources Forum

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Light duty vehicles, i.e. passenger cars and light trucks, account for approximately half of global transportation energy demand and, thus, a major share of carbon dioxide and other emissions from the transport sector. Energy consumption in the transport sector is expected to grow in the future, especially in developing countries. Cars with alternative powertrains to internal combustion engines (notably battery, hybrid and fuel‐cell powertrains), in combination with potentially low carbon electricity or alternative fuels (notably hydrogen and methanol), can reduce energy demand by at least 50%, and carbon dioxide and regulated emissions much further. This article presents a comparative technical and economic assessment of promising future fuel/vehicle combinations. There are several promising technologies but no obvious winners. However, the electric drivetrain is a common denominator in the alternative powertrains and continued cost reductions are important for widespread deployment in future vehicles. Development paths from current fossil fuel based systems to future carbon‐neutral supply systems appear to be flexible and a gradual phasing‐in of new powertrains and carbon‐neutral fluid fuels or electricity is technically possible. Technology development drivers and vehicle manufacturers are found mainly in industrialised countries, but developing countries represent a growing market and may have an increasingly important role in shaping the future.

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Section: Powertrain Efficiencymentioning

confidence: 99%

Section: Powertrain Efficiencymentioning

confidence: 99%