Comparison of Diesel Exhaust Emissions Using JP-8 and Low-Sulfur Diesel Fuel.
Interim rept. Mar 94-Mar 95,
SOUTHWEST RESEARCH INST SAN ANTONIO TX TARDEC FUELS AND LUBRICANTS RESEARCH F ACILITY
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Comparative emission measurements were made in two dynamometer-based diesel engines using protocol specified by the U.S. Environmental Protection Agency EPA and the California Air Resources Board CARB. A single JP-8 fuel with a sulfur level of 0.06 wt was adjusted to sulfur levels of 0.11 and 0.26 wt. The emission characteristics of the three fuels were compared to the 1994 EPA certification low-sulfur diesel fuel sulfur level equal to 0.035 wt in the Detroit Diesel Corporation DDC 1991 prototype Series 60 diesel engine and in the General Motors GM 6.2L diesel engine. Comparisons were made using the hot-start transient portion of the heavy-duty diesel engine Federal Test Procedure. Results from the Army study show that the gaseous emissions for the DDC Series 60 engine using kerosene-based JP-8 fuel are essentially equal to values obtained with the 0.035 wt sulfur EPA certification diesel fuel, and that an approximate sulfur level of 0.21 wt in kerosene-type JP-8 fuel would be equivalent to the 0.035 wt sulfur reference fuel. Similarly, the regulated gaseous emissions for the GM 6.2L engine using JP-8 fuel are essentially equal to the values obtained with the 0.035 wt sulfur EPA reference fuel. All sulfur levels of kerosene-type JP-8 fuel up to the 0.30 wt MIL-T-83133 specification maximum would be equivalent to a 0.035 wt sulfur EPA reference fuel.