The course is organized in several modules which cover the different topics, whose study offer the students a complete knowledge about the design and operation of internal combustion engines:
Fundamentals of IC Engines
Fundamentals of IC engine thermodynamic cycles. Classification of IC engines. Performance indexes, engine maps.
Gas Exchange Process
Inlet and exhaust processes in the four-stroke engine. Quasi-steady and dynamic effects on cylinder charging. Flow through the valves: flow rates and discharge coefficients. Valve flow areas, optimum lifts and timings.
Scavenging process in the two-stroke engine. Global scavenging parameters. Flow through the ports.
Turbocharging of IC Engines
Supercharging and turbochargers. Constant pressure and pulse turbocharging. Wastegate valves and variable geometry turbines. Dual stage turbocharging configurations.
Unsteady Flows in the Pipes
Effects of unsteady flows and pressure waves in the pipes on cylinder charging. Optimum design of the intake and exhaust pipe systems to exploit wave effect.
Fuels for IC engines
Properties of conventional (gasoline, diesel) and alternative fuels (bio-ethanol, biodiesel, gaseous fuels, synthetic fuels). Knock rating of fuels.
Injection Systems for SI and Diesel engines
Fuel injection systems for SI and Diesel engines. Spray atomization and penetration. Common rail systems.
In-Cylinder Turbulent Flow
Turbulent air motion: swirl, squish and tumble.
Combustion in SI Engines
Normal and abnormal combustion processes in spark ignition engines.
Combustion in CI Engines
Non-premixed combustion, flame structure, ignition delay. Innovative low temperature combustion modes.
Pollutant formation mechanisms and emission control strategies. Aftertreatment systems: three-way catalyst, Diesel particulate filter, Selective Catalytic Reduction catalyst with urea injection.
Innovative Powertrain Solutions
Innovative IC engines for eco-sustainable mobility: hybrid vehicles, alternative combustion modes.
Noise and Acoustics
Noise source analysis and their control. Silencers, reactive and absorptive types.