This work investigated the influence of variation of supercharging pressure and compression ratio on performance characteristics in a single cylinder direct injection compression ignition (DICI) engine. The engine was coupled with centrifugal blower type supercharger and compression ratio varied as 14:1, 16:1, 17.5:1 and 18:1. The boost pressures (BPs) were changed at four levels 0.5 kPa (g), 1 kPa (g), and 1.5 kPa (g) along with natural aspiration. The experiments were conducted by varying of these two parameters for investigating the impact on performance characteristics using the standard petrodiesel (type 2) as fuel. The obtained results are compared with the standard operating condition of the engine, i.e., natural aspiration at compression ratio 17.5:1. The results show that the improvement in BSFC, BTE was higher at low load, higher compression ratio and at elevated BPs, whereas enhancement for EGT is found to be more at the higher side of working input parameters. The maximum improvement in performance parameters such as BTE, BSFC and EGT, were noted 25.4 %, 21.7 %, and 3.3 % respectively. The specific power of engine has distinctly increased by 15 %, 25 %, 27 %, and 16 % at CR 14, 16, 17.5, and 18, respectively at 1.5 kPa (g) as compared to standard operating condition.
compression ignition engine, biodiesel, combustion, linum usitatissimum, performance, supercharging
The authors are thankful to All India Council of Technical Education, Government of India, for their support towards carrying out research work under Quality Improvement Program.
 Nelson SA, Filipi ZS, Assanis DN. (2003). The use of neural nets for matching fixed or variable geometry compressors with diesel engines. J Eng Gas Turbines Power 125: 572–579. https://doi.org/10.1115/1.1563239
 Cooper B, Jackson N, Beasley M. (2004). Technology development to meet the future demand for passenger car diesel engines with lower emissions and higher performance. In: SIA International Congress, The Diesel Engine: Today and Tomorrow, Ecole Centrale de Lyon, France, pp. 12-13.
 Alarcón R, Malagón-Romero D, Ladino A. (2017). Biodiesel production from waste frying oil and palm oil mixtures. Chemical Engineering Transactions 57: 571-576. https://doi.org/10.3303/CET1757096
 Sulaiman S, Shah B, Jamal P. (2017). Production of biodiesel from palm oil using chemically treated fish bone catalyst. Chemical Engineering Transactions 56: 1525–1530. https://doi.org/10.3303/CET1756255
 Zhang L, Takatsuki T, Yokota K. (1994). An observation and analysis of the combustion under supercharging on a DI diesel engine. In: International Congress & Exposition. SAE Technical Paper, pp. 11. https://doi.org/10.4271/940844
 Suzuki H. (1994). Effect of EGR on combustion and exhaust emission of a supercharged diesel engine. In: Proc. Spring Convention, p. 9432967. https://doi.org/10.4271/2009-01-1832
 Kobori S, Yokosuka A. (2003). Study on ignition delay in high turbo charged diesel engines. Nippon Kikai Gakkai Ronbunshu B Hen(Transactions Japan Soc Mech Eng Part B)(Japan) 15: 1966–1971. https://doi.org/10.1299/kikaib.69.1966
 Ishikawa N. (2012). A study on emissions improvement of a diesel engine equipped with a mechanical supercharger. Int J Engine Res 13: 99–107. https://doi.org/10.1177/1468087411434885
 The age of engine downsizing is over, says Volkswagen. In: Telegr. http://www.telegraph.co.uk/cars/news/age-engine-downsizing-says-volkswagen/. Accessed 19 Jan 2018.
 Is engine downsizing finally falling out of fashion? | Evo. In: evo,THE THRILL Driv. http://www.evo.co.uk/features/18753/is-engine-downsizing-finally-falling-out-of-fashion. Accessed 19 Jan 2018.
 Sroka ZJ. (2012). Some aspects of thermal load and operating indexes after downsizing for internal combustion engine. J Therm Anal Calorim 110:51–58. https://doi.org/10.1007/s10973-011-2064-x.
 Yoshimoto Y. (2016). Influence of supercharging on biodiesel combustion in a small single cylinder DI diesel engine. SAE Int.
 Amba Prasad Rao G, Mohan PR (2003). Effect of supercharging on the performance of a DI Diesel engine with cotton seed oil. Energy Convers Manag 44: 937–944. https://doi.org/10.1016/S0196-8904(02)00095-X
 Jagadish D, Ravi Kumar P, Murthy KM. (2011). The effect of supercharging on performance and emission characteristics of compresion ignition engine with diesel-ethanol-ester blends. Therm Sci 15:1165–1174. https://doi.org/10.2298/TSCI100513042J.
 Joshi D, Viswanath PV, Sandeep B. (2014). The Effects of Supercharging on the Performance of C. I Engine Using Blends of Pre-Heated Cotton Seed Oil and Diesel as Alternate Fuel. In: Advance Research and Innovations in Mechanical, Material Science, Industrial Engineering and Management – ICARMMIEM: 110–113. https://doi.org/10.1016/s0140-6701(03)83102-8
 Mahmood Mousavi S, Abolfazli Esfahani J, Yazdi Mamaghani M. (2013). Alternative Equations to Compute the Network and the Thermal Efficiency of the Irreversible Diesel Cycle Using Genetic Algorithm. Am J Mech Eng 1: 119–125. https://doi.org/10.12691/ajme-1-5-3
 Roberts M. (2002). Benefits and challenges of variable compression ratio ( VCR ). SAE Tech Pap 14: 03P–227. https://doi.org/10.4271/2003-01-0398