Experimental study of combustion and emission characteristics of ethanol fuelled port injected homogeneous charge compression ignition (HCCI) combustion engine

• Published in: Applied energy Vol. 88; no. 4; pp. 1169 - 1180
• Main Authors: Maurya, Rakesh Kumar, Agarwal, Avinash Kumar
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.04.2011; Elsevier
• Series: Applied Energy
• Subjects: Air pollution caused by fuel industries; air temperature; Applied sciences; Charge; Combustion; Combustion efficiency; Combustion Emission Homogeneous charge compression ignition (HCCI) Controlled auto-ignition Ethanol Port fuel injection (PFI); Combustion of liquid fuels; Combustion. Flame; Controlled auto-ignition; diagnostic techniques; Emission; Emission analysis; emissions; Energy; Energy. Thermal use of fuels; Engines; Ethanol; Ethyl alcohol; Exact sciences and technology; Fission nuclear power plants; gas exchange; heat; Homogeneous charge compression ignition (HCCI); Ignition; Installations for energy generation and conversion: thermal and electrical energy; Intakes; Metering. Control; Port fuel injection (PFI); Theoretical studies. Data and constants. Metering; Emission; Controlled auto-ignition; Combustion; Port fuel injection (PFI); Homogeneous charge compression ignition (HCCI); Ethanol
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2010.09.015

The homogeneous charge compression ignition (HCCI) is an alternative combustion concept for in reciprocating engines. The HCCI combustion engine offers significant benefits in terms of its high efficiency and ultra low emissions. In this investigation, port injection technique is used for preparing homogeneous charge. The combustion and emission characteristics of a HCCI engine fuelled with ethanol were investigated on a modified two-cylinder, four-stroke engine. The experiment is conducted with varying intake air temperature (120–150 °C) and at different air–fuel ratios, for which stable HCCI combustion is achieved. In-cylinder pressure, heat release analysis and exhaust emission measurements were employed for combustion diagnostics. In this study, effect of intake air temperature on combustion parameters, thermal efficiency, combustion efficiency and emissions in HCCI combustion engine is analyzed and discussed in detail. The experimental results indicate that the air–fuel ratio and intake air temperature have significant effect on the maximum in-cylinder pressure and its position, gas exchange efficiency, thermal efficiency, combustion efficiency, maximum rate of pressure rise and the heat release rate. Results show that for all stable operation points, NO x emissions are lower than 10 ppm however HC and CO emissions are higher.