Unit PROPULSION SYSTEMS
- Course
- Mechanical engineering
- Study-unit Code
- A005725
- Curriculum
- Energy
- Teacher
- Carlo Nazareno Grimaldi
- Teachers
-
- Carlo Nazareno Grimaldi
- Hours
- 72 ore - Carlo Nazareno Grimaldi
- CFU
- 9
- Course Regulation
- Coorte 2025
- Offered
- 2025/26
- Learning activities
- Caratterizzante
- Area
- Ingegneria meccanica
- Academic discipline
- ING-IND/08
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- Mobility included in the general context of energy consumption and polluting emissions containment. Innovative propulsion systems, electric-thermal hybrids for energy transition and sustainability. Analysis of the energy needs of transport systems: propulsion-user coupling. Development of advanced thermal engines for coupling with electric motors in hybrid powertrains. Performance measurement and evaluation systems. Filling coefficient and its optimization through advanced design of air introduction systems: exploitation of dynamic effects, supercharging. Conventional and innovative fuels; low or zero carbon fuels. Methodologies for introducing fuels into spark ignition or compression engines. Combustion modes, organized charge motions. Development of mechanical power generation, anomalous combustion and their limitation. Polluting emissions: generation, abatement. Innovative engines for limiting the generation of polluting emissions and components: ultra-lean engines, plasma igniters, control with On Board Diagnostics methodologies with artificial neural networks. Hybrid electric-thermal engines: notes on the different typologies, characteristics, large-scale operational problems, development prospects.
- Reference texts
- G. Ferrari - Motori a combustione Interna - Esculapio J.B. Heywood - Internal combustion engine fundamentals - Mc Graw Hill
- Educational objectives
- Develop and achieve the ability to interpret the phenomena that characterize the engines, in order to know how to design and develop them.
- Prerequisites
- The course is imparted in the first semester of the first year of the Master of Science in Mechanical Engineering: consequently it is considered necessary and sufficient the education received in Mechanical Engineering Bachelor Degree courses.Of particular importance is considered the knowledge acquired in the courses: Physics, Applied Physics, Machinery and energy Systems.
- Teaching methods
- Face-to-face lessons (classroom / lab)
- Other information
- N.A.
- Learning verification modality
- Oral exam, indicative duration of between 30 and 50 minutes, with 3 questions.
- Extended program
- Hybrid engines and their basic components and configurations. Engine-user coupling: steady state motion, motion with transient; motion on a slope; analytical calculation of angular acceleration, dynamic equilibrium, implementation of the calculation of the acceleration transient in a calculation code. Volumetric efficiency in 4T and 2T engines. Fundamental relations, engine test bench, indicated cycle and instruments, stability, elasticity, maps. Stationary effects at the intake: thermal, load losses; efflux coefficient. Dynamic effects at the intake: inertial, wave, variable geometry systems. Experimental methodologies and instruments for the analysis of flows in MCI intake systems: stationary and dynamic flow benches, swirl and tumble meters. Supercharging. Distribution diagrams, parameters influencing filling. Two-stroke engines, dynamic effects at the exhaust. Fuels, determination of Octane and Cetane numbers. Introduction of fuel in DIESEL engines: pumps, injectors, notes on the Common Rail system, characteristics of spray jets: atomization, penetration, diffusion; component design; experimental methodologies for spray analysis: PDA, PIV, Laser Sheet. Introduction of fuel in OTTO engines: PFI, GDI. Charge motions in the cylinder: turbulence and cyclic dispersion; swirl, squish, tumble. Combustion in internal combustion engines: chemical reactions, laminar and turbulent combustion, premixed and diffusive; normal combustion in Otto engines, heat release; non-normal combustion in Otto engines: detonation, surface ignition; combustion chamber design. Combustion in Diesel engines, heat release, combustion chamber design. Notes on acoustic and thermal aspects of MCI operation. Gaseous polluting emissions from MCI: general aspects, measurement tools and procedures; Otto engine emissions; emission abatement systems; OBD diagnostics; application of Artificial Neural Networks. Methodologies and instruments for the analysis of MCI characteristics in terms of performance and polluting emissions. CFD-1D: one-dimensional computational fluid dynamics. CFD-3D: three-dimensional computational fluid dynamics. Insights into hybrid propulsion systems with internal combustion engine - electric motor.
- Obiettivi Agenda 2030 per lo sviluppo sostenibile
- 7 - affordable and clean energy 11 - sustainable cities and communities 13 - climate action