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Cold Temperature Effects on Speciated VOC Emissions from Modern GDI Light-Duty Vehicles 1
Citation:
George, I., M. Hays, R. Snow, J. Faircloth, T. Long, AND R. Baldauf. Cold Temperature Effects on Speciated VOC Emissions from Modern GDI Light-Duty Vehicles 1. Emissions Inventory Conference, Baltimore, MD, August 15 - 18, 2017.
Impact/Purpose:
This abstract summarizes results from a recent AEMD dynamometer research study that investigated the speciated emissions from modern light-duty vehicles with gasoline direct injection engines at two temperatures. This work will provide critical emissions data to improve emissions inventories and air quality models.
Description:
In this study, speciated VOC emissions were characterized from three modern GDI light-duty vehicles. The vehicles were tested on a chassis dynamometer housed in a climate-controlled chamber at two temperatures (20 and 72 °F) using the EPA Federal Test Procedure (FTP) and a portion of the Supplemental FTP (i.e. US06) that represents more aggressive driving conditions. The vehicles operated gasoline blended with 10% ethanol. VOC emissions from diluted vehicle exhaust were sampled with SUMMA canisters for EPA Method TO-15 analysis and with 2,4-Dinitrophenylhydrazine (DNPH) cartridges for carbonyl analysis by EPA Method TO-11A. This presentation will report the impact of ambient cold temperature, driving cycle, and GDI technology on speciated VOC emissions.