Combustion and Emission Characterization of n-Butanol Fueled HCCI Engine

Abstract

Com bustion and Em ission C haracterization of n-B utanol Fueled HCCI EngineBiofuels are attracting global attention as alternate transportation fuels due to advan tages of their being produced from locally available renewable resources, lower pollution potential, and biodegradable nature. Butanol is fast emerging as one of the competitive biofuels for use in transportation engines. Homogeneous charge compression ignition (HCCI) engines have shown great potential for higher engine efficiency and ultralow NOx and particulate matter (PM) emissions. This experimental study is therefore carried out to combine the advantages of biofuels and HCCI engines, both. Detailed perform ance, combustion, and emission characteristics of n-butanol fueled HCCI engine are investigated experimentally. The study is conducted on a four cylinder diesel engine, whose one cylinder was modified to operate in HCCI combustion mode. Port fuel injec tion technique was used for homogeneous charge preparation in the intake manifold. Auto-ignition of fuel in the engine cylinder was achieved by intake air preheat ing. In-cylinder pressure-crank angle data acquisition with subsequent heat release anal yses and exhaust emission measurements were done for combustion and emission characterization. In this paper, the effect of intake air temperature and air-fuel ratio on the combustion parameters, thermal and combustion efficiency, ringing intensity (RI), and emissions from n-butanol fueled HCCI engine were analyzed and discussed compre hensively. Empirical correlations were derived to fit the experimental data for various combustion parameters.

Free-Piston Linear Generator and the Development of a Solid Lubrication System

“…In Ref. [5,6], it is shown that butanol can be paired with homogeneous charge compression ignition combustion mode.…”