Unit INTERNAL COMBUSTION ENGINES
- Course
- Mechanical engineering
- Study-unit Code
- GP004954
- Curriculum
- Energia
- Teacher
- Carlo Nazareno Grimaldi
- Teachers
-
- Carlo Nazareno Grimaldi
- Hours
- 96 ore - Carlo Nazareno Grimaldi
- CFU
- 12
- Course Regulation
- Coorte 2023
- Offered
- 2023/24
- 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
- Italiano
- Contents
- Chemical, thermo-fluid dynamic and mechanic phenomena are treated, underlying operation performance and emissions of MCI, ensuring in particular a deep understanding of the phenomena by the students, to develop skills, and to transfer the gained skills in the design, even in an innovative sense.
- Reference texts
- G. Ferrari - Motori a combustione Interna - EsculapioJ.B. Heywood - Internal combustion engine fundamentals - Mc Graw Hill
- Educational objectives
- Develop and achieve an advanced knowledge about internal combustion engines operation and design criteria and methodologies.
- 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, so structured:- 2 questions, open answer;- 1 question about the results of a practical application of simulation codes, prepared in groups, with free timing (Application of numerical codes of one-dimensional computational fluid dynamics - CFD-1D).
- Extended program
- The morphology of the internal combustion engine and construction aspects.Motor-user: steady state motion, transient motion, motion in slope, the analytic calculation of the engine angular acceleration, dynamic balance, implementation of the calculation of the acceleration in a computer code.Volumetric efficiency in two and four stroke engines. Fundamental relations, engine test bench, engine maps.Steady effects at the intake: temperature, pressure drop, discharge coefficient.Dynamic effects at the Intake: inertial effects, wave effects, variable geometry systems.Experimental methods and instrumentation for flow analysis in intake systems: steady flow bench, dynamic flow bench, swirl and tumblemeasuring gauges.Supercharging.Valve lift and phase diagrams, parameters affecting volumetric efficiency.Two-stroke engines, dynamic effects in the exhaust systems.Fuels, determination of the Octane and Cetane numbers.Fuel feeding in compression ignition engines: pumps, injectors, common rail, spray characteristics: spray penetration, droplet size, jet diffusion angles; project of components; experimental methods for the analysis of the spray: PDA, PIV, Laser Sheet.Fuel feeding in spark ignition engines: PFI, GDI.In cylinder charge motion: turbulence and cyclic dispersion; swirl, squish, tumble.Combustion in internal combustion engines: chemical reactions, laminar and turbulent combustion, premixed and diffusive combustion, normal combustion in gasoline engines, heat release, non normal combustion in spark ignition engines: detonation, surface ignition; design of the combustion chamber.Combustion in compression ignition engines, heat release; design of the combustion chamber.Acoustic and thermal aspects of the ICEs operation.Pollutant emissions from ICEs: regulations; measurement procedures and instruments; engine emissions; emission reduction systems; OBD Diagnostics, application of artificial neural networks.Methodologies and tools for analyzing the characteristics of MCI in terms of performance and emissions.CFD-1D: one-dimensional computational fluid dynamics.CFD-3D: three-dimensional computational fluid dynamics.
Hybrid propulsion systems, with internal combustion engine - electric motor powertrains.