Subject: SPERIMENTAZIONE E CALIBRAZIONE POWERTRAIN (A.A. 2024/2025)
Unit Sperimentazione e Calibrazione Powertrain
Mechanical Engineering (lesson)
Powerunit/Motori a combustione interna
The course will provide information regarding:
- powertrain testing facilities and instrumentations;
- internal combustion engine calibration, with particular attention to its integration into hybrid powertrains.
Powerunit/Motori a combustione interna
Introduction to powertrain testing and calibration.
Testing (2 CFU)
Features of powertrain testing facilities and design of the main sub-systems (ventilation, air-conditioning, cooling, fuel storage and supply).
Instrumentation for the measurement of:
- Torque, power, speed (brakes);
- Fuel, combustion air and oil consumption;
- Pollutant emissions.
Data acquisition systems and types of test.
Control, calibration and homologation (1,5 CFU)
Fundamentals of gasoline and Diesel engines control and calibration; influence of control strategies on fuel consumption, performance and pollutant emissions.
Design, control, and energy management of hybrid powertrains. Integration and control of ICE in HEV.
ICE in-cylinder pressure traces acquisition and combustion analysis. Alternative fuels with low environmental impact.
Vehicle homologation procedures with particular reference to emission tests.
Vehicle testing on chassis dynamometers.
Modeling with Matlab/Simulink of hybrid vehicles and optimization of their control strategies. (1,5 CFU)
Combustion analysis and alternative fuels (1 CFU):
ICE in-cylinder pressure traces acquisition and combustion analysis.
Alternative fuels with low environmental impact and innovative combustion strategies.
The course includes: - theoretical lessons with the use of multimedia systems - numerical exercises - PC lab work (software: Matlab/simulink and Excel) - visit at the DIEF Powertrain Testing Laboratory
The final exam consists of 3 parts: - report on homemade project to be delivered 2 days before the exam on a hybrid vehicle model simulated in Matlab/ Simulink (details on Dolly) - a written test with open questions, closed questions and simple exercises (duration about 30 min) - an oral test (duration 20-40 min) The project is evaluated between 0 and 2 points that are added to the written test score and it is discussed during the oral test. Access to the oral exam only with vote >=18/30 at the written exam. The final grade is calculated as written score + oral score (the oral score can vary between -13 and +2). It is not possible to use books or notes either during the written test or during the oral test.
After completing the course, a student will:
- have detailed information about powertrain testing facilities, instrumentations and methodologies;
- understand the main engine control strategies and their effect on fuel consumption, performance and emissions;
- understand the control strategies of an ICE required by HEV applications;
- have detailed information about the experimental analysis of the ICE combustion process;
- know the architectures and strategies for managing the energy flows of hybrid propulsion systems and the procedures for their homologation, with particular reference to the tests on polluting emissions;
- be able to build a basic model using Matlab/Simulink software of a hybrid vehicle and test its control strategies;
- A. J. Martyr, David Rogers, Engine Testing - Electrical, Hybrid, IC Engine and Power Storage Testing and Test Facilities, 5th Edition - October 14, 2020, Butterworth-Heinemann
- Mehrdad Ehsani, Yimin Gao, Stefano Longo, Kambiz Ebrahimi, Modern Electric, Hybrid Electric, and Fuel Cell Vehicles, 3rd Edition, 2018, CRC Press
- GUZZELLA, Lino; ONDER, Christopher. Introduction to modeling and control of internal combustion engine systems- Second Edition. Springer, 2010.
- GUZZELLA, Lino; SCIARETTA, Antonio. Vehicle Propulsion System - Third Edition, Springer, 2012
- Ferrari, Giancarlo: Internal Combustion Engines (English Edition)