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The sales of diesel powered vehicles are increasing day by day, so is the demand for diesel fuel. In contradiction, worldwide sources of diesel fuel are diminishing at a rapid pace and are expected to last no longer than few decades. In this situation, Biodiesel has come up as a promising alternative for diesel fuel and research in automotive industry will be focused on development of combustion systems utilizing Biodiesel as working substance, replacing conventional diesel fuel. Theoretical analysis and experimentation was done to explore various characteristics of Biodiesel as fuel in Internal Combustion (CI) engines. This paper focuses on Injection and combustion analysis and exhaust emission analysis of Biodiesel as fuel. Blends of Biodiesel with conventional diesel with proportion of Biodiesel varying from 5 - 100% were used for the analysis.

This paper is aimed at highlighting the issues and challenges, and some control measures of GHG emissions (CO2, N2O and CH4) from transport vehicles. The importance of fuel economy improvement on CO2 emission reduction is emphasized as it will be an immediate solution to reduce the emission. The role of alternative fuels and vehicles on control of GHG emission is discussed in this paper. The CO2 emission norms proposed by some country are also discussed in detail.

Compressed Natural Gas (CNG) has been regularly used as a fuel for transportation sector. Hydrogen has been found to posse the unique feature close to that of a zero emission vehicles. Mixture of CNG and Hydrogen can further improve the performance and emission characteristics of a CNG-fuelled engine. This paper describes the results of an experimental study carried out on a spark ignition engine in the Engines and Unconventional Fuels Lab of Centre for Energy Studies in Indian Institute of Technology, Delhi. It has been observed that addition of 10% and 15% hydrogen on energy basis to operate a CNG-fuelled engine significantly improves the performance and emission characteristics of the system.

Performance, combustion and emissions investigations relating to the use of Ethanol 5% + Methanol in a spark ignition engine are described in this paper. The engine used for experimental purpose is Enfield motorcycle engine of 13.4 Kw (18 hp). A new online multi liquid fuel mixing system has been developed for perfect mixing [1] and hence found better for investigating effects of various Ethanols 5%+ Methanol Gasoline blends (E5M5, E5M10, E5M15, E5M20) hence enhances engine performance and reduction in exhaust emissions could experimentally results. Performance tests conducted with this system and showed considerable performance improvement in power output and in thermal efficiency, as well as substantial reduction in BSFC, HC, CO and NOx emissions

Performance, combustion and emissions investigations relating to the use of Methanol 5% + Ethanol blends in a spark ignition engine are described in this paper. The engine used for experimental purpose is Enfield motorcycle engine of 13.4 Kw (18 hp). A new online multi liquid fuel mixing system has been developed for perfect mixing [1] and hence found better for investigating effects of various Methanol 5%+ Ethanol Gasoline blends (M5E5, M5E10, M5E15, M5E20) hence enhances engine performance and reduction in exhaust emissions could experimentally results. Performance tests conducted with this system and showed considerable performance improvement in power output and in thermal efficiency, as well as substantial reduction in BSFC, HC, CO and NOx emissions.