Control of Exhaust Emissions in Four Stroke Compression Ignition Engine by Using Piston Coatings with Diesel Blends

The experimental investigations on four stroke single cylinder compression ignition engine is to reduce the exhaust emissions by using unleaded diesel and alcohol blends on the CI engine with 25% ethanol, 25% beutanol, 25% proponol and 75% diesel used to control carbon mono oxide (CO) and UN burnt hydro carbons (UBHC)& Nitrous Oxide (NOx) .These pollutants are hazardous to the nature and cause health problems to the human beings and impact on the environment.The copper coated piston (CCP) of 300µ of thickness is coated on the piston crown.A micro processor based analyzer is used for the measurement of CO, NOx and UBHC from the exhaust manifold.The work done on the CI engine is fuelled with ethanol, beutanol and propanol blends of proportions are compared with the base piston (BP), CCP engine, to find the performance (break thermal efficiency, specific fuel consumption etc..,) and emission characteristics.The CCP with alcohol blended diesel is considerably reduces emissions of CO, NOx and UBHC and increase in the engine performance characteristics when compared to the BP with pure diesel operation.