Effects of compression ratios on performance and emissions of diesel engine fuelled with Pilliostigma Thonningii.

This paper presents a comparative performance study with the standardized emission results of a controlled output of 7.4 KW, a stand-alone diesel engine equipped with biodiesel (B100) and diesel fuel. Biodiesel was used in this study is produced from transesterification-processed Pilliostigma Thonningii (PT) oil. The tests were performed at full load for different compression ratios of 18:1, 19:1, 20: 1. Impact of these compression ratios affecting the performance parameters like brakes thermal efficiency, BSFC and emissions such as CO, CO₂, HC, NOx and Smoke. The compression ratio that provides better performance and less emission have been identified. The results show higher break thermal efficiency, reduced fuel consumption and a growing trend in CO₂ and NO_x emissions. [ABSTRACT FROM AUTHOR]