B020737 - INTERNAL COMBUSTION ENGINES

Italian

G. Ferrari, Motori a Combustione Interna, Esculapio editore
J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw Hill International Editions.
G. A. Pignone, U. R. Vercelli, Motori ad alta potenza specifica, Giorgio NADA editore

The aim of this course is to provide knowledge on reciprocating machines (basically Internal Combustion Engines and reciprocating compressors and pumps). Basically thermo-fludodynamic aspects will be analysed with the aim of investigating the main design criteria and how to analyse the machine performance.

The following capabilities will be acquired from an energetic student:
CA1 Ability of analysis and modeling of mechanical/electrical/propulsive components and systems: basic problems and models for industrial engineering, with special reference to mechanical and energy engineering.
CA2 Ability of applying knowledge in the field of thermofluidodynamic and machinery to solve problems of theoretical and applied thermodynamics, fluid dynamics and heat transfer.
CA3 Ability of designing, analyze, plan and manage energy conversion systems and their environmental impact, as well as complex and/or innovative service and process systems.
CA4 Implement the thermofluidodynamic design of components, starting from the basic aspects (0D) up to the CFD implementation.
CA5 Identify, formulate and solve industrial engineering problems, with special focus to energy issues.
CC2 Tools for modeling energy/mechanical/propulsion systems and their role in supporting the analysis and design of systems and components.
Understanding the organization of information in databases and computer design to support processes
CC5 Applied fluid dynamics and machinery: machine components and systems for energy conversion, propulsion and design principles: from the 0D basic approach to CFD for advanced design (optimization).

The following capabilities will be acquired from a mechanical student:
CA8: Applying knowledge and understanding related to the appropriate interpretation of the results of experimental tests, verification calculations and complex theoretical simulation processes, through the use of the computer, applying the acquired experimental, modeling, mathematical and informatics bases.
CA11: Applying improved knowledge and understanding to present in written, verbal and, if necessary, multimedia form, their arguments and the results of their own study or work, with characteristics of organic and technical rigour.
CA12: Applying adequate knowledge and understanding to understand English texts.
CA15: Applying knowledge and understanding to achieve adequate preparation for tertiary level university studies (frequency to post-master's degree courses and doctoral schools) in order to further deepen knowledge and skills in research.
CC3: Knowledge, understanding and use of scientific (computer and other) tools specific to the field of mechanical engineering design.
CC6: In-depth knowledge and understanding of production systems and technologies. Understanding the advantages and limitations of technologies and process choices in different application contexts. Knowledge of methods for the representation of mechanical components and systems, and for their reconstruction from artifacts, deepening the aspects strictly connected with production systems and technologies.
CC7: Knowledge and understanding of the design principles of production plants and processes, logistical facilities for material handling and storage. Understanding the advantages and limitations of process and plant design choices in different application contexts.
CC12: Knowledge and understanding of methods for conceiving, planning, designing and managing complex and/or innovative systems, processes and services.

Thermodynamic cycles ( Beau de Rochas, 1st and 2nd Diesel, Sabathé).
Mechanical and kinematics aspects of the engine.
Coupling of cam and valve.
Balancing aspects

The course syllabus is carried out by means of lectures with the support of slide projection.

The exame is based on an oral discussion on generally 3 topics of the syllabus. It allows to evaluate the comprehension of the reciprocating connections of the main concepts. Moreover the appropriated use of the technical words has taken into account.

Basically the course Is focused on:

- Fields of employment, typical parameters, geometrical and cinematic quantities.
- Indicated and effective quantities, characteristic curves, user-ICE coupling, ICE-vehicle integration.
- Influencing terms of intake process in 4 and 2 strokes engine.
- Power control and regulation: partial load working condition
- Overview on the main systems for fuel supplying: indirect and directed injection of the fuel; carburetor.
- charge motion analysis: flow characterization - swirl, tumble, squish.
- Spark ignition combustion: flame propagation, heat release law formulation, anomalous combustions.
- auto-ignition combustion: delay time for ignition, heat release law formulation, direct ignition systems (Common Rail, pump injector).


Volumetric machines:

- Fields of employment, typical parameters, geometrical and cinematic quantities.
- Indicated and effective quantities, characteristic curves.
- Power control and regulation:
- Overview on the main applications
- Automatic valves in reciprocating compressors