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Subject: POWERTRAIN DESIGN AND MANUFACTURING/INTERNAL COMBUSTION ENGINES (A.A. 2023/2024)

master degree course in ADVANCED AUTOMOTIVE ENGINEERING

Course year 1
CFU 12
Teaching units Unit Powertrain Design and Manufacturing
Mechanical Engineering (lesson)
  • TAF: Compulsory subjects, characteristic of the class SSD: ING-IND/14 CFU: 6
Teachers: Dario CROCCOLO
Unit Internal Combustion Engines
Mechanical Engineering (lesson)
  • TAF: Compulsory subjects, characteristic of the class SSD: ING-IND/08 CFU: 6
Teachers: Vittorio RAVAGLIOLI
Exam type written
Evaluation final vote
Teaching language inglese
Contents download pdf download

Teachers

Vittorio RAVAGLIOLI
Dario CROCCOLO

Overview

- Powertrain Design and Manufacturing:

The aims of the course are to provide the knowledge, the methods and the tools useful for the correct design and verification of the mechanical powertrain components, such as, the gear transmissions, the belt transmissions, the power connection elements and their materials. At the end of the course the students will be able, for example, to select the most appropriate type of mechanical connections or transmission system.

- Internal Combustion Engines:

This course aims to provide an understanding of how the design and control of internal combustion engines affect performance, consumption, emissions and radiated noise.
For all the analyzed engine architectures, students will develop extensive expertise about fluid flows, fuel systems, thermodynamics and combustion with reference to the way these factors affect engine power, efficiency and emissions.
The course also covers the analysis of experimental data acquired during activities run in engine test cells.
The application of specific knowledge acquired will enable students to choose the optimal technical solution for different engine applications and critically analyze experimental data acquired by main sensors applied to the engine.

Admission requirements

Internal Combustion Engines:

Basic thermodynamics
Fluid machineries

Course contents

- Powertrain Design and Manufacturing:

Introduction to the powertrain components.

Driving belts: flat belts, trapezoidal belts and timing belts.

The rotating disk theory.

The shaft hub couplings: press-fit shrink-fit, taper-fit, tongue-fit and spline hole/shaft.

Gears transmissions and their design.

- Internal Combustion Engines:

• Thermodynamic cycles overview: introduction to SI and CI engines;
• Fundamental paramenters for the evaluation of engine performance;
• Intake and exhaust processes;
(ECTS 1.0, 10 hours)
• SI engine combustion process;
• Variable Valve Timing (VVT) systems;
• Performance of the SI engine and emissions control;
• Knock and fuel requirements, Misfire and Pre-Ignition;
(ECTS 1.5, 15 hours)
• CI engine combustion;
(ECTS 0.5, 5 hours)
• Performance of SI engines and emissions control;
• Diesel engine fuel systems and injection pattern design in Common Rail Multi-Jet systems;
• Engine combustion noise: measurement and control;
• Hydrogen and synthetic fuels;
(ECTS 1.0, 10 hours)
• Supercharging techniques;
(ECTS 1.5, 15 hours)
• Introduction to innovative combustion techniques (LTC, HCCI, PCCI, RCCI, GDCI);
• Closed-loop combustion control fundamentals.
(ECTS 0.5, 5 hours)

Teaching methods

- Powertrain Design and Manufacturing: The course includes theoretical and practical lectures given with the aid of multimedia systems. The didactic material is uploaded at the platform “Virtuale" (https://virtuale.unibo.it) - Internal Combustion Engines: Teaching involves theoretical frontal lessons carried out with the help of multimedia systems. The teaching material will be available at the end of each lesson through the "Dolly" (http://dolly.ingmo.unimore.it) and VirtuaLe (https://virtuale.unibo.it/) platforms.

Assessment methods

- Powertrain Design and Manufacturing: The exam consists in a written and in an oral test. The written part consists in the solution of three exercises in which, both the conceptual and the numerical results, will be evaluated. The oral part consists in a discussion about the written part and about the theoretical arguments dealt during the lectures. - Internal Combustion Engines: The exam will take place at the end of the course according to the official exam session calendar. The final assessment consists in an oral examination. During such examination, students are required to answer 3 questions. To assess their understanding and application of the course content. The evaluation indicators are: - Ability to use knowledge (25%) - Ability to connect knowledge (25%); - Mastery of technical language (15%); - Ability to discuss topics (20%) - Ability to deepen the topics (15%) The evaluation of the oral exam is expressed out of thirty (a score greater than 30 leads to obtaining the grade: 30 cum laude). The examination is passed if the student reaches at least a sufficient mark (18/30).

Learning outcomes

- Powertrain Design and Manufacturing:

The student acquires basic and advanced knowledge on the design and sizing of machine parts and their components dedicated to powertrain transmission.

- Internal Combustion Engines:
Knowledge and understanding:
Lectures provide students with the basic concepts of design, development and control of modern internal combustion engines. Understanding of such concepts enables the ability to develop and apply original ideas, even in the area of Research and Development.

Applied knowledge and understanding:
for the discussed ICE technologies, the students will be able to recognize:
- the principles of operation;
- the main modelling and design criteria;
- the guidelines to properly control the mechanical system.

Independent thinking:
The theoretical knowledge acquired, together with the analysis of experimental data carried out with the support of the professor, promote the development of remarkable analytical and critical thinking skills, suitable for complex decision-making processes.

Communication skills
Clearly communicate the knowledge and understanding skills acquired.
Use correctly and appropriately the language, concepts and models acquired to effectively discuss the design and modelling solutions for propulsion systems with internal combustion engines

Learning skills:
All the described activities enable students to develop necessary learning skills to broaden their knowledge of technical topics independently, with the aim of effectively promoting their integration in the labour market or access to further courses.

Readings

- Powertrain Design and Manufacturing:

Robert C. Juvinall - Kurt M. Marshek “Machine Component Design”, 5th Edition Wiley
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)

Pahl G., Beitz W., Feldhusen J., Grote K.-H., [http://www.springer.com/it/book/9781846283185] - A Systematic Approach, 2007, Springer, ISBN 978-1-4471-6025-0

Ullman G.D.
“The Mechanical Design Process”
Mc Graw-Hill, 1992.

- Internal Combustion Engines:

• Notes taken by the students and lecture material provided by the professor;
• G. Ferrari, "Motori a Combustione Interna", Esculapio;
• J.B. Heywood, "Internal Combustion Engine Fundamentals", McGraw Hill;