Journal
FUEL
Volume 261, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.116434
Keywords
Iso-butanol; Gasoline; RCCI; Combustion; Exhaust emissions; Low loads
Categories
Funding
- Science & Technology Department of Sichuan Province [2017TD0026]
- Sichuan Provincial Scientific Research Innovation Team Program [17TD0035]
- Sichuan Science and Technology Program [2019YJ0394]
- Key Scientific Research Fund of Xihua University [z1320315]
- Project of Sichuan Provincial Department of Education [14ZB0128]
- Open Research Fund of Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province [szjj2014-066]
- Key Laboratory of Fluid and Power Machinery (Xihua University), Ministry of Education of China [szjj2017-084]
- 'Young Scholars' program of Xihua University
- Graduate Innovation Fund of Xihua University [ycjj2018095]
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This work experimentally studies the combustion and emission of iso-butanol/diesel RCCI (Reactivity Controlled Compression Ignition) under low loads and compares its results with gasoline/diesel RCCI. The results show that iso-butanol/diesel RCCI has better power recovery ability than gasoline/diesel RCCI. When R-p (Premixed Ratio) is 50% and 60%, IMEP (Indicated Mean Effective Pressure) of iso-butanol/diesel RCCI is 1.4% and 3.9% higher than maximum IMEP of CCM (Conventional Combustion Mode) respectively. Both iso-butanol/diesel and gasoline/diesel RCCI contain LTHR (Low Temperature Heat Release) and HTHR (High Temperature Heat Release). With increase of R-p in both RCCI combustion modes, combustion phase retard, peak value of heat release and maximum PRR (Pressure Rising Rate) decrease, ID (ignition delay), CD (combustion duration), CA50-CA10, maximum mean in-cylinder temperature and ITE (Indicated Thermal Efficiency) increase. Compared with the gasoline/diesel RCCI, iso-butanol/diesel RCCI has later combustion phase, longer ID, CD and CA50-CA10, higher maximum mean in-cylinder temperature and ITE, as well as lower maximum PRR. Furthermore, with increase of R-p, CO (Carbon Monoxide), NOx (Nitrogen Oxides) and PM (Particulate Matter) emissions decrease, HC (Hydrocarbon) increases for both gasoline/diesel and iso-butanol/diesel RCCI. Compared with the gasoline/diesel RCCI, iso-butanol/diesel RCCI achieves lower CO, HC, NOx and PM emissions.
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