Chassis Dynamometer Emission Measurements from Trucks and Buses using Dual-Fuel Natural Gas Engines

Paper #:
  • 1999-01-3525

Published:
  • 1999-10-25
Citation:
Norton, P., Frailey, M., Clark, N., Lyons, D. et al., "Chassis Dynamometer Emission Measurements from Trucks and Buses using Dual-Fuel Natural Gas Engines," SAE Technical Paper 1999-01-3525, 1999, https://doi.org/10.4271/1999-01-3525.
Pages:
15
Abstract:
Emissions from trucks and buses equipped with Caterpillar dual-fuel natural gas (DFNG) engines were measured at two chassis dynamometer facilities: the West Virginia University (WVU) Transportable Emissions Laboratory and the Los Angeles Metropolitan Transportation Authority (LA MTA). Emissions were measured over four different driving cycles. The average emissions from the trucks and buses using DFNG engines operating in dual-fuel mode showed the same trends in all tests - reduced oxides of nitrogen (NOx) and particulate matter (PM) emissions and increased hydrocarbon and carbon monoxide (CO) emissions - when compared to similar diesel trucks and buses. The extent of NOx reduction was dependent on the type of test cycle used.
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