Codice identificativo insegnamento: 052392
Programma
sintetico:
1D simulation of intake and exhaust
systems by fluid dynamic models: prediction of unsteady flows;
fundamental equations and numerical methods; boundary conditions
Single
zone and multi-zone thermodynamic combustion models: SI and CI
engines; balance equations, solution methods; chemical equilibrium and
simplified kinetic sub-models.
Prediction of typical
pollutant emissions from SI and CI engines: CO, HC, NOx, soot,
by means of suitable kinetic sub-models and simplified semi-empirical
models.
Conversion of pollutants in after-treatment systems:
modeling of chemical reactions and conversion efficiency of three-way
catalyst, SCR, oxidation catalyst, DPF.
Conventional/hybrid
vehicle simulations under real driving conditions: calculation
of performances (engine efficiency, fuel consumption and CO2 emission) and
emissions, considering different vehicle architectures.
Power
Electronics and converters: Description of the characteristics
of diodes and controllable switches (Mosfets, IGBTs, …) and thermal
behaviour. Switch mode dc-dc converters: full-bridge (four quadrant)
converter. PWM modulation. Switch mode dc-ac converters: single phase and
three-phase structure. Sinusoidal PWM modulation.
Electrical
Machines for traction: Rotating magnetic field. Synchronous
machine. Permanent Magnets Brushless DC and AC: structure, operation
principle, mechanical characteristic. Induction machine. Structure,
operation principle, mechanical characteristic. Synchronous Permanent
Magnet Outer Rotor (In-Wheel) Motor.
Design of the
electrical main components of a series hybrid vehicle starting from the
driving characteristics.
Modeling of the
regenerative braking systems.