Authors: N. Janardhan
Abstract: To evaluate the performance of diesel engine with high grade low heat rejection combustion chamber which consisting of air gap insulated piston with 3 mm air gap, with superni (an alloy of nickel) crown, air gap insulated liner with superni insert and ceramic coated cylinder head with neat diesel with varied injection pressure experiments were carried out. Performance parameters brake thermal efficiency, exhaust gas temperature, coolant load, volumetric efficiency and sound levels were determined at different values of brake mean effective pressure (BMEP) of the LHR–3 combustion chamber and compared with neat diesel operation on conventional engine (CE) at similar operating conditions. It is also found that Engine with LHR–3 combustion chamber with neat diesel operation showed deteriorated performance at manufacturer’s recommended injection timing of 27o bTDC.The Injection pressure changed from 190bar to 270bar with an increment of 40bar.
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