Abstract
The potential of alcohol addition by port injection and blended fuel for improving combustion in diesel engines was investigated. NOx reduction and thermal efficiency improvement at middle and high loads were achieved as a result of the characteristics of oxygen content, low cetane number and low viscosity of the fuel. The NOx reduction effects during New European Driving Cycle were shown to be 38% with port injection method and 24% with blended fuel method. Differences in soot generation were analyzed by combustion visualization using an optical research engine.
