AN EXPERIMENTAL INVESTIGATION ON ENGINE PERFORMANCE OF A LOW HEAT REJECTION (MULLITE COATED) SINGLE CYLINDER DIESEL ENGINE WITH AND WITHOUT TURBOCHARGER

In Present Investigation at the first stage, experiments were conducted on baseline (Conventional) engine and hence combustion and emission Parameters were recorded. At second stage Mullite, which is a compound of SiO2 and Al2O3 with composition 3Al2O3.2SiO2 (Aluminium oxide 60% and Silicon dioxide 40%), was used as a (TBC) thermal barrier coating material. The piston crown, cylinder valves and cylinder head of diesel engine were coated with a 0.5 mm thickness of 3Al2O3.2SiO2 (mullite) over a 150-?m thickness of Nickel Chrome Aluminium Yttrium (NiCrAlY) bond coat using plasma spray technique to achieve less heat loss and combustion and emission Parameters were recorded for LHR engine. The operational parameters i.e. air-fuel ratio and engine speed conditions were maintained constant for both conventional as well as Low Heat rejection engines. In Third stage, the experiments were conducted on turbocharged low heat rejection (LHR) single cylinder diesel engine with advanced injection timing. The main objective of the study was to evaluate combustion parameters and overall engine performance of these engines.