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Light-Duty GDI Vehicle PM and VOC Speciated Emissions at Differing Ambient Temperatures with Ethanol Blend Gasoline
Citation:
Baldauf, R., R. Snow, AND T. Long. Light-Duty GDI Vehicle PM and VOC Speciated Emissions at Differing Ambient Temperatures with Ethanol Blend Gasoline. 2012 CRC Real World Emissions Workshop, San Diego, CA, March 26 - 28, 2012.
Impact/Purpose:
Evaluate the influence of gas direct injection on emissions of particulate emissions and mono-aromatic volatile organic compounds
Description:
With the rise in the use of ethanol-blend gasoline in the US and more manufacturers implementing gasoline direct injection (GDI) technologies, interest is increasing in how these fuel blends affect PM and VOC emissions in GDI technology vehicles. EPA conducted a study characterizing emissions from two light-duty GDI vehicles operated on a chassis dynamometer using the LA92 driving cycle. These vehicles were fueled with 10% ethanol gasoline (E10), and 15% ethanol gasoline (E15). The chassis dynamometer was housed in an environmental control chamber, and the vehicles were operated at 0, 20 and 75 degrees Fahrenheit for all vehicle and fuel combinations. Exhaust emissions were characterized for criteria pollutants (CO, NOx, PM2.5), VOC and carbonyl air toxics (e.g. benzene, toluene, xylenes, acetaldehyde, acrolein), and particulate components (e.g. mass, carbon content). Results show the trends in vehicle emissions for these measured pollutants based on vehicle technology, fuel, and temperature combinations. This presentation describes the results of the PM and VOC pollutant measurements for the multiple testing parameters.