Analysis of Performance, Emissions, and Combustion in a CRDI Diesel Engine Operating on Soapnut Oil as Fuel

This study explores the performance of a Common Rail Direct Injection (CRDI) diesel engine using soapnut oil blends as an alternative fuel. In light of growing environmental concerns and the depletion of fossil fuel reserves, the need for sustainable fuel solutions has become more urgent. Soapnut oil, derived from Sapindus mukorossi seeds, emerges as a promising biodiesel candidate. This research examines how soapnut oil blends affect key engine performance parameters, including brake specific fuel consumption, thermal efficiency, and exhaust emissions such as carbon monoxide, nitrogen oxides, and smoke. Additionally, in-depth combustion analysis is conducted, utilizing in-cylinder pressure measurement and heat release rate analysis better to understand the combustion characteristics of soapnut oil blends. The results of this study provide valuable insights into the feasibility, benefits, and challenges of using soapnut oil as an alternative fuel in CRDI diesel engines, contributing to sustainable energy strategies in the transportation sector.