EFFECT OF INJECTION TIMING ON PERFORMANCE PARAMETERS OF DIRECT INJECTION DIESEL ENGINE WITH CERAMIC COATED CYLINDER HEAD

were carried out to evaluate the performance of diesel engine with low heat rejection (LHR-1) combustion chamber consisting of conventional piston, conventional liner and ceramic coated cylinder head with neat diesel with varied injection timing. Performance parameters (brake thermal efficiency, exhaust gas temperature, coolant load, volumetric efficiency and sound levels ) were determined at various values of brake mean effective pressure (BMEP) of the engine with LHR-1 combustion chamber and compared with neat diesel operation on conventional engine (CE) at similar operating conditions. The optimum injection timing was found to be 31 o bTDC (before top dead centre) with conventional engine, while it was 30 o bTDC for engine with LHR-1combustion chamber with diesel operation. Engine with LHR-1 combustion chamber with neat diesel operation showed comparable performance at manufacturer's recommended injection timing of 27 o bTDC, and