This paper presents the results of computer simulation based thermodynamic analysis on a turbocharged V6 TCI BI-Turbo spark ignition engine under variable speed operation using petrol and ethanol as alternative fuels. The results have been simulated in the professional thermodynamic simulation software named AVL BOOST.
First the modeled engine was run in the petrol mode and the results were computed for the octane requirement for petrol for the turbocharged configuration of the spark ignition engine under consideration. The results were also computed for its performance and emission characteristics.
The computational investigations were repeated on the same engine using ethanol as a second fuel. The engine demands gasoline as well as ethanol having varied octane ratings over its entire range of the speed. The engine also gives satisfactory performance with both the fuels petrol and ethanol.
The engine produces higher power and torque output in the petrol mode as compared to the ethanol mode. The brake specific fuel consumption of the engine in the petrol mode is lower than that in the ethanol mode. However the ethanol based engine produces less CO and HC emissions.
The engine produces higher NOx emissions with petrol fuel than that produced with ethanol as a fuel.
Octane Requirement, Turbocharged, Multi-cylinder, Spark Ignition Engine, Performance, Emissions, Petrol and Ethanol
