LOW EMISSION DUAL FUEL ENGINE AND METHOD OF OPERATING SAME

摘要

A dual fuel engine system and method of operating the engine reduces emission ratesof pollutants. The dual fuel engine includes a fuel oil supply connected to the engineand a fuel gas supply connected to the engine. Means connected between the fuel oilsupply and the engine inject low levels of diesel fuel into the engine. In particular, theinjection of diesel fuel is limited to pilot injection quantities only. The exhaust emissionof NOx is maintained at less than 1GM/HP-HR, where natural gas is used as theprimary fuel, and less than 0.5 GM/HP-HR where digester gas is used as the primaryfuel.