Abstract
Rising demand for fuel will now pose a significant risk for global pollution levels in various applications. The biodiesel of Karanja oil methyl ester (KOME), an alternative to diesel fuel, is a potential source of unspent fuel in India. Karanja oil contains fatty acid esters, which are environmentally friendly fuel. This experiment aimed to research low heat rejection using Karanja oil methyl ester with retarded injection timing diesel-fueled. The piston, cylinder walls, and engine valves were coated with a 0.5 mm thickness of partially stabilized zirconium (PSZ) without affecting the engine compression ratio. Experiments in the engine with and without coating were carried out using Karanja oil methyl ester. The results showed that Karanja oil methyl ester's specific fuel consumption a retarded timing (RT) with coated engine decreased by 7.4 percent and the brake thermal efficiency improved by 5.5 percent compared to the conventional engine with diesel fuel. CO and UBHC emissions on the LHR with RT engine are lower, whereas the zirconia coating has increased NOx emissions.
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