INTERNAL COMBUSTION ENGINES
6 credits during the 2nd year of 9269 Mechanical Engineering - Design and Production (LM-33) GENOVA
The course deals with the most relevant topics relating to reciprocating Internal Combustion Engines (ICE).
The aim of the course is to provide an adequate qualification in the field of reciprocating Internal Combustion Engines (ICE), deepening some of the most important topics with special reference to the automotive application. The main topics of the course are: engine part load operation (referring to both conventional and innovative regulating systems), operational aspects of ICE, electronic engine control, supercharging and turbocharging, ICE exhaust emissions control and after treatment.
AIMS AND LEARNING OUTCOMES
At the end of the course the student will acquire specialist knowledge on some aspects of current relevance for the development of alternative internal combustion engines, with particular reference to the road traction. The student will therefore be able to handle complex issues related to the design, management and control of the main systems and devices of modern automotive ICE.
Lectures, practice and laboratory.
- Real cycle and operational aspects of ICE – Real cycles of SI and diesel engines: analysis of loss contributions - ICE energy balance - Fuel supply circuits of SI and diesel engines.
- Engine part load operation – Control engine parameters – Constant speed and constant load curves, engine performance maps – Part load operation of spark ignition and diesel engines – Analysis of engine performance and fuel consumption at different speed and load levels – Road vehicle performance simulation – Engine downsizing – Introduction to innovative engine regulating systems.
- Electronic engine control – General aspects on ICE control – Layout and components of ICE electronic control systems: sensors, ECU, actuators – Open and closed loop control - Components and operation of the main electronic control systems in automotive SI and Diesel engines.
- Supercharging and turbocharging – Engine-compressor matching in mechanical supercharging and turbocharging - Determination of turbocharger operating conditions – Constant pressure and pulse turbocharging: quantitative considerations, energy aspects, engine exhaust circuit design – Transient response, torque characteristic curves of supercharged and turbocharged engines – Turbocharger control systems (waste-gate valve, variable geometry turbine) – Design aspects of exhaust turbochargers - Alternative charging systems.
- Test bench measurements on an automotive engine.
- Measurement of a turbocharger performance maps.
- M. Capobianco - “Motori a combustione interna” – Notes to the course (in Italian)
- G. Ferrari - "Motori a combustione interna" - Esculapio, 2016.
- J.B. Heywood - "Internal Combustion Engine Fundamentals" - Mc. Grow-Hill, 1988.
- K. Zinner - "Supercharging of Internal Combustion Engines" - Springer Verlag, 1977.
- N. Watson, M.S. Janota – “Turbocharging the Internal Combustion Engine” – MacMillan Press Ltd, 1982.
- AA.VV. – “Bosch Automotive Handbook” – 7th Edition, Robert Bosch GmbH, 2007.
Ricevimento: Meetings with the students by appointment (please send an e-mail to firstname.lastname@example.org).
Lectures, practice and laboratory.
Oral exam on the topics covered in the lectures and exercises.
The oral examination will be focused on the topics treated during the lessons and will be aimed at evaluating not only the fulfilment of an adequate knowledge level, but also the acquisition of critical analysis skills on the topics of the exam and the aptitude of correlation of different topics.
- Basic thermodynamic and fluid dynamics knowledge.
- Basic knowledge on ICE: ICE classification, components and nomenclature, main operational parameters – Ideal and real operation of 2 and 4 stroke engines – Indicated diagrams, indicated and brake mean effective pressure, engine power correlations. Reference thermodynamic cycles for SI and diesel engines - Combustion processes in SI and diesel engines. ICE pollutant emissions, emission control systems and aftertreatment devices for SI and diesel engines.