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CARB releases results of multi-year E15 study; multiple air quality benefits with slight reduction in fuel economy

Green Car Congress

The study was performed by a team from the University of California at Riverside (UCR) Bourns College of Engineering – Center for Environmental Research and Technology (CE-CERT). The test fleet showed statistically significant effects for some pollutants, but not for others.

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UC Riverside team examines influence of mid-and high-level ethanol blends on pollution from GDI flex fuel vehicle

Green Car Congress

The researchers used four fuels: a baseline US EPA Tier 3 E10 fuel; one E10 fuel with higher aromatics content than the baseline E10; an E30 fuel that was splash-blended with the Tier 3 E10; and an E78 fuel. Testing was conducted over triplicate cold-start and hot-start LA92 cycles.

Pollution 255
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WUSTL study finds use of air conditioning reduces in-car pollution

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Traffic is a major source of harmful pollutants; daily peak exposures tend to occur near roadways or while traveling—or being stuck—on them. That gave them rare, real-world look at pollutant exposure. With windows closed, the pollutants took longer to enter the vehicle cabin, but also longer to exit it. the least.

Pollution 186
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Study finds air quality models significantly underestimate traffic as source of NOx in Europe

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Traffic contributes more to NO x emissions in Europe than previously thought, according to a new study by a team at the University of Innsbruck. It has been a challenge to determine how much each polluter contributes to the emission output. We record 36,000 data points per hour. —Thomas Karl.

Europe 150
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Study finds fleet switch from PFI to GDI engines will result in net reduction in global warming

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The study, by a team of researchers from Carnegie Mellon University, University of Georgia, Aerodyne Research, California Air Resources Board (ARB), Ohio State University, UC Berkeley, and UC San Diego is published in the ACS journal Environmental Science & Technology. engine calibration (spark timing, valve timing, etc.),

Fleet 207
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U-M study: Induced driving miles could overwhelm potential energy-saving benefits of connected, self-driving cars

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The benefits of connected, self-driving cars (CAVs) will likely induce vehicle owners to drive more, and those extra miles could partially or completely offset the potential energy-saving benefits that automation may provide, according to a new University of Michigan study. 2019.03.174.

Connect 220
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Assessment of US CAFE fuel economy standards finds big savings on fuel and emissions since inception

Green Car Congress

In one of the first comprehensive assessments of the fuel economy standards in the United States, researchers from Princeton University and the University of Tennessee found that, over their 40-year history, the standards helped reduce reliance on foreign oil producers, cut greenhouse gas emissions, and saved consumers money.