Influence of Fuel Properties on Diesel Combustion and Emissions.

Abstract

The influence of fuel properties on the combustion and emissions of a D. I. diesel engine was analyzed, providing independent descriptions of the distributions of distillation temperature, kinematic viscosities, ignitabilities, and aromatic contents. The results showed that smoke increased with increase in the kinematic viscosities, shorter ignition lags, and increase in the aromatic content, especially at high equivalence ratios. This NOx was reduced slightly with increase in kinematic viscosity and with the decrease in aromatic content. The content of unburnt HC increased with increases in the ignition lags and kinematic viscosities. The only substantial effect of aromatic content on particulate matter was an increase in dry soot at high equivalence ratios. However, the dry soot decreased at high equivalence ratios and SOF increased at all equivalence ratios with lengthening ignition lags caused by the increases in the aromatic content and so on. The distribution of distillation temperatures had very little influence on exhaust gas emissions and engine performance.