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Downspeeding and Supercharging a Diesel Passenger Car for Increased Fuel Economy
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2012 by SAE International in United States
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The effects of downspeeding and supercharging a passenger car diesel engine were studied through laboratory investigation and vehicle simulation. Changes in the engine operating range, transmission gearing, and shift schedule resulted in improved fuel consumption relative to the baseline turbocharged vehicle while maintaining performance and drivability metrics. A shift schedule optimization technique resulted in fuel economy gains of up to 12% along with a corresponding reduction in transmission shift frequency of up to 55% relative to the baseline turbocharged configuration. First gear acceleration, top gear passing, and 0-60 mph acceleration of the baseline turbocharged vehicle were retained for the downsped supercharged configuration.
CitationOstrowski, G., Neely, G., Chadwell, C., Mehta, D. et al., "Downspeeding and Supercharging a Diesel Passenger Car for Increased Fuel Economy," SAE Technical Paper 2012-01-0704, 2012, https://doi.org/10.4271/2012-01-0704.
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