Modeling of automotive propulsion systems

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.