The module aims at providing the basic knowledge for the dynamic modelling and design of the vehicle chassis and its main parts. The different subsystems will be dealt with highlighting the following issues: • design methodology of chassis subsystems, • illustration of the architecture and of the main functional features, • subsystem dynamic model and integration in the vehicle model, Mathematical models at vehicle system level will be presented with increasing level of complexity. Their role in the study of the chassis design will be highlighted.

The student must acquire knowledge about the criteria for setting the design specification of the chassis conceived as a system. Additionally, the student must gain knowledge on chassis subsystems such as suspension, steering and braking. The student must know and distinguish critically the main architectural solutions, set the models for simulations and understand the advantages that can be achieved adopting different solutions.

The knowledge requested for the present course are related to the subjects presented in the following previous courses: Motor Vehicle Design, Fundamentals of Machine Design & Drawings, Numerical modeling & simulation, Car Body Design & Aerodynamics and Applied Mechanics.

Here below is reported the course Syllabus 1. The chassis and its main subsystems. 2. The role of the tires on the vehicle dynamics, the current models for their steady state and dynamic behaviour. 3. Suspensions: the functionality of the different parts (main and secondary elastic members, shock absorber, arms, strut, …) and definition of the design methodology. 4. Steering mechanisms and their design methodology. 5. Lateral dynamics study by linear and non-linear rigid vehicle models, 10 degrees of freedom model, model decoupling of handling and comfort. Study of the impact of the chassis subsytems on the vehicle dynamics. 6. Study of the vehicle directional behaviour and stability. Study of the vehicle comfort. 7. Longitudinal dynamics and driveline vibrational behaviour. Effects on the vehicle driveability. Laboratories and/or exercises in class room Implementation of increasing complexity vehicle dynamic models. Analysis of the results and study of the effect of the parameters.

The course is organized in 32 hours of Lectures and 18 hours of Laboratory classes. The teacher will support the students with tutoring classes (10 hours). Lectures will be held with the support of the blackboard, slides and notes. The documentation used during the lessons and the exercises will be made available to the students through the website. Laboratory classes consist in the implementation of models describing the handling and comfort of the vehicle at increasing level of complexity. The course syllabus of Chassis A is completed by the course syllabus of Chassis B.

• G. Genta, L. Morello, The automotive Chassis, Volume 1 and 2, Springer, 2009. • W.F. Milliken, D.L. Milliken, “Race Car Vehicle Dynamics”, SAE International, 1995. • G. Genta, "Motor Vehicle Dynamics", World Scientific, 2002 • H. Heisler, "Vehicle and Engine Technology", Arnold, 1999 • J. Reimpell, H. Stoll, "The Automotive Chassis: Engineering Principles", Arnold, 1996

Modalità di esame: Prova scritta (in aula); Prova orale obbligatoria; Elaborato scritto prodotto in gruppo;

Exam: Written test; Compulsory oral exam; Group essay;

... The exam consists of: - a written part composed by 4 open and 10 multiple choice questions in a 2 hours time frame. Computers, telephones and any printed documentation are not allowed. - an oral part which can be accessed only if the score of the written part is ≥ 18/30. - project report presentation and discussion are mandatory during the oral part.

Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.