Thermal barrier coating materials for SI engine

Abstract

Ceramic coating on various parts of an internal combustion (IC) engine provides excellent thermal barrier properties which are used in preventing the heat loss during the working cycle. In case of two strokes spark-ignition engine, during the combustion in the combustion chamber (CC), due to various reasons, cent percent combustion of the charge is not possible resulting in un-burnt hydrocarbons such as CO and HC. The presence of un-burnt hydrocarbons in the exhaust gasses leads to the pollution. One of the reasons for this is heat loss in the CC. This heat loss can be saved using thermal barrier coating (TBC) on various parts of the engine. This paper discusses various TBC materials, its properties and effect on SI engines performance, combustion and emission characteristics. Keywords: SI engines, Piston coatings, Thermal barrier coating, Exhaust emission