Effect of varying the Compression ratio and Injection timing on Performance and emission parameters in CI engine using Mahua Bio-diesel

Biodiesel derived from non-edible oils have become the need of the hour in order to solve the problem of oil crisis. In the present work, B20 blend of Mahua biodiesel was tested in a single cylinder diesel engine.The engine variables like CR and IT were adjusted together where CR was varied from 16 to 18 with injection timing 20°, 23° and 25° bTDC in order to evaluate the performance and emission parameters. BTE increased slightly and BSEC shown a very slight reduction at higher loads with B20 blend at standard setting. Higher increase in BTE and reduction in BSEC was observed with the advanced injection timing at higher loads. Emissions of UBHC, CO and Smoke reduced with B20 blend and further reduced with advanced injection timing whereas NOx emissions increased with B20 blend at standard setting and advanced injection timing.