Effect of operating parameters on diesel/propane dual fuel premixed compression ignition in a diesel engine
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In this research, the effects of three operating parameters (Diesel injection timing, propane ratio, and exhaust gas recirculation (EGR) rates) in a diesel-propane dual fuel combustion were investigated. The characteristics of dual-fuel combustion were analyzed by engine parameters, such as emission levels (Nitrogen oxides (NOx) and particulate matter (PM)), gross indicated thermal efficiency (GIE) and gross IMEP Coefficient of Variance (CoV). Based on the results, improving operating strategies of the four main operating points were conducted for dual-fuel PCCI combustion with restrictions on the emissions and the maximum pressure rise rate. The NOx emission was restricted to below 0.21 g/kWh in terms of the indicated specific NOx (ISNOx), PM was restricted to under 0.2 FSN, and the maximum pressure rise rate (MPRR) was restricted to 10 bar/deg. Dual-fuel PCI combustion can be available with low NOx, PM emission and the maximum pressure rise rate in relatively low load condition. However, exceeding of PM and MPRR regulation was occurred in high load condition, therefore, design of optimal piston shape for early diesel injection and modification of hardware optimizing for dual-fuel combustion should be taken into consideration.
KeywordsDiesel engine Dual-fuel combustion GIE (Gross Indicated thermal Efficiency) NOx (Nitrogen Oxides) PCCI (Premixed Charge Compression Ignition) RCCI (Reactivity Controlled Compression Ignition)
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- Curran, S., Hanson, R., Wagner, R. and Reitz, R. (2013). Efficiency and emissions mapping of RCCI in a lightduty diesel engine. SAE Paper No. 2013-01-0289.Google Scholar
- Curran, S., Prikhodko, V., Cho, K., Sluder, C. S., Parks, J., Wagner, R., Kokjohn, S. and Reitz, R. D. (2010). Incylinder fuel blending of gasoline/diesel for improved efficiency and lowest possible emissions on a multicylinder light-duty diesel engine. SAE Paper No. 2010-01-2206.Google Scholar
- Dempsey, A. B., Walker, N. R. and Reitz, R. D. (2013). Effect of piston bowl geometry on dual fuel reactivity controlled compression ignition (RCCI) in a light-duty engine operated with gasoline/diesel and methanol/diesel. SAE Paper No. 2013-01-0264.Google Scholar
- Hanson, R., Kokjohn, S., Splitter, D. and Reitz, R. (2011). Fuel effects on reactivity controlled compression ignition (RCCI) combustion at low load. SAE Paper No. 2011-01-0361.Google Scholar
- Heywood, J. (1988). Internal Combustion Engine Fundamentals. McGraw-Hill. New York, USA.Google Scholar
- Kokjohn, S., Hanson, R., Splitter, D., Kaddatz, J. and Reitz, R. (2011). Fuel reactivity controlled compression ignition (RCCI) combustion in light-and heavy-duty engines. SAE Paper No. 2011-01-0357.Google Scholar
- Nieman, D., Dempsey, A. and Reitz, R. (2012). Heavyduty RCCI operation using natural gas and diesel. SAE Paper No. 2012-01-0379.Google Scholar
- Ojeda, W., Zoldak, P., Espinosa, R. and Kumar, R. (2009). Development of a fuel injection strategy for partially premixed compression ignition combustion. SAE Paper No. 2009-01-1527.Google Scholar
- Zhang, Y., Sagalovich, I., De Ojeda, W., Ickes, A., Wallner, T. and Wickman, D. D. (2013). Development of dualfuel low temperature combustion strategy in a multicylinder heavy-duty compression ignition engine using conventional and alternative fuels. SAE Paper No. 2013-01-2422.Google Scholar