Hot Start Transient Emissions from a Mercedes OM 366 LA and a Detroit Diesel Operated on Chilean, California, and US 2D Fuels

ABSTRACT

The emission performance of a 1997 Mercedes OM 366 LA medium heavy-duty diesel engine and a 1998 Detroit Diesel Corporation (DDC) Series 60 heavy heavy-duty diesel engine was investigated using the US EPA hot-start transient cycle using different candidate diesel fuels developed by the Empresa Nacional Del Petroleo (ENAP), the state-owned oil production and refining company of Chile. The aim of the work was to identify a clean diesel fuel that can be readily produced and reduces emissions from diesel engines in Chile, particularly in Santiago Metropolitan Area where air pollution is a serious problem. Using a Mercedes engine of the type found in Chile, several candidate fuel formulations were tested in both the Mercedes and DDC engines to identify leading candidate formulations that would effectively reduce emission in both traditional and modern technology engines. Relative to US 2D fuel, most candidate fuels showed superior emission performance for both engines, and some candidate fuels performed better than California reference fuel on selected pollutants. Emission results and properties for the fuels are given along with correlations between regulated emissions and selected fuel properties.