Investigations on the impact of EGR with a modified combustion chamber for CI diesel engine using biodiesel

Abstract

The economic growth of the country mainly depends on transportation sector. In this connection petro-diesel consumption has been increased due to wide development of transportation sector. With increase in petro-diesel products there is a serious threat on the reserves of petroleum products (fossil fuels) and pollution levels of environment. This has been thrown a great challenge in front of the researchers working in this domain. To reduce the afore said problems as the petro-diesel products are exhaustive in nature, there is a necessity to find suitable alternative fuel in place of petro-diesel products. Further to reduce the intensity of pollutant levels in the environment also a suitable substitute to be selected. Both these qualities are found in majority of bio diesels. Bio diesel properties are closure to diesel fuel. But the NOx emissions produced with biodiesel are more compared to diesel fuel. Hence, a suitable modification for the existing engine to be carried out to enhance combustion phenomenon and to reduce pollutant levels. In the present work the experiments are conducted with suitable bio diesel, piston geometry and EGR design. With these the investigations are conducted out on four stroke single cylinder water cooled, computerized test rig of CI diesel engine. The performance and emission characteristics are investigated. The results are correlated with base engine and found fruitful, which are presented in the full text.