Alcohol Blend Design Emissions Light 
Green Car Congress
NOVEMBER 26, 2013
Summary of significant emissions results from the fuel testing. Given equivalent deployment of butanols and ethanol, the results suggest emissions of unburned alcohols would decrease, but carbonyl emissions would increase; some of these compounds have poorly understood health effects, they note. Click to enlarge.
Green Car Congress
OCTOBER 11, 2019
This work will help the research community better understand the efficiencies that biofuels bring to the table, and identifies the biofuels that enable more efficient engine design and operation. These blendstocks are best-suited for light-duty (LD) gasoline BSI engines.
Green Car Congress
MARCH 27, 2020
For the past four years, the Co-Optimization of Fuels & Engines (Co-Optima) National Laboratory consortium has focused research efforts primarily on turbocharged (boosted) spark-ignition (SI) engines for light-duty vehicles. Of the fuel properties investigated, these six were found to have the most impact on engine efficiency and emissions.
Green Car Congress
JUNE 28, 2019
While fuel economy ratings of today’s cars significantly outstrip those of just a decade ago, cost-effective efficiency improvements remain limited by existing engine designs and fuel formulas. It represents the most detailed correlation to date of fuel properties and engine efficiency.
Green Car Congress
AUGUST 25, 2015
A higher compression ratio can be used if an engine will operate primarily at light loads, such that degraded efficiency at high loads is more than offset by improved efficiency at light loads. Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value. —Leone et al.
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