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The combustion of homogeneous charge compression ignition (HCCI) fuelled with methanol was achieved on a modified CI engine by heating the intake air. The effects of intake temperature and mixture concentration on HCCI combustion characteristics and emissions were analyzed in this paper. Initially the experimental run with pure diesel then the piston is modified with CE Coated Engine - Aluminium oxide Al2O3 and addition of methanol on HCCI engine, then the same type of experimental have been carried under the Lemon Grass Methyl Ester (LGME) with coating and methanol in HCCI Engine. The result of the experiment with performance of BTE increases with coated engine and decreases by addition of methanol, LGME blend results has decreases and increases with (CE) and decreases by addition of methanol. BSFC results increased with all condition because the blend and thermal coating had a higher viscosity and lower energy content. The emission results such as CO, HC NoX and smoke were the NoX is slightly increased when compared to other emission in future the impact of adopting a varied compression ratio and technique to analysis the NoX emission control. [ABSTRACT FROM AUTHOR]