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Hybrid propulsion systems

04OYCNE, 04OYCQD

A.A. 2020/21

2020/21

Hybrid propulsion systems

Hybrid propulsion systems

Hybrid vehicles represent nowadays one of the most promising solutions to reduce the impact of conventional powertrains on the air quality and to move towards a more sustainable motorised mobility. In this framework, this subject aims to provide the students with a comprehensive knowledge on the hybrid propulsion systems. Besides, the different architectures for hybrid powertrains, the subject includes the discussion and analysis of their different components (i.e. the internal combustion engine, electric motor, power electronics converters and control systems, energy storage systems) on the basis of the performance required to the vehicle.

Hybrid propulsion systems

Hybrid propulsion systems

At the end of the semester , the student is expected to achieve a comprehensive knowledge of hybrid electric vehicles. Foremost he/she should be able to perform a critical analysis on existing hybrid powertrains emphasizing their strength and weaknesses. Moreover, based on the information about electric machines, internal combustion engines and energy storage systems collected during the semester, the student should be capable to preliminary design a hybrid architecture in order to achieve predefined vehicle targets in terms of emissions (CO2 and pollutants) and dynamic performance.

Hybrid propulsion systems

Hybrid propulsion systems

The recommended curriculum includes the knowledge of the following subjects: - Fundamentals of mechanical engineering - Fundamentals of thermodynamics and thermal machines - Fundamentals of electric machines

Hybrid propulsion systems

Hybrid propulsion systems

Foremost, the motivations which have led to the development of hybrid systems will be analyzed emphasizing the additional functionalities and the benefits enabled by the combined use of Internal Combustion Engines and Electric Machines. Afterward the main topologies and classifications for hybrid propulsion systems will be presented through the analysis of several applications currently available in the market. Since the powertrain electrification requires the introduction of non-conventional devices, the subject will also deal with the operating principles and the evolution scenarios of the Electrochemical and non-Electrochemical Energy Storage Systems, Electric Motors & Power Electronic Converters. Moreover, since the performance of a hybrid vehicle strongly depends on its powertrain control strategy, the course will also provide a critical analysis of the most relevant algorithm which can support the design of an Energy Management System. Details on the subject topics: * Motivation for hybrid propulsion and powertrain requirements - Environmental Impact & Need for Sustainable Mobility - Benefits for the end users (performance, drivability, safety) -Basics of vehicle longitudinal dynamics -Overview on Internal Combustion Engines & Transmissions * Main topologies and classifications for hybrid propulsion systems - Series Hybrid - Parallel Hybrid - Complex Architectures * Working Principles and technological trends of Electric Machines - Fundamentals of electromechanical conversion - Induction Machines - Synchronous Machines (with and without permanent magnets) * Working Principles and technological trends of Power Electronics - Power Electronics components - DC/AC Converters (Inverters for e-motor) - DC/DC Converters for electrical adaptation - AC/DC Converters (battery chargers for plug-in hybrid) * e-Drives energetic modeling and control strategies - Basics of e-drive control strategies - Simplified e-drive energetic modeling * Working Principles and technological trends of Energy Storage Systems - Electrochemical Batteries and Super Capacitors Technologies - Electrochemical Battery modeling - Electrochemical Battery Management Systems (BMS) * Methodologies for powertrain control strategy optimizations - Global Optimization Strategy (Dynamic Programming) - Local Optimization Strategy (Equivalent Consumption Minimization Strategy) - Heuristic Control Technique (Rule Based)

Hybrid propulsion systems

Hybrid propulsion systems

Hybrid propulsion systems

Hybrid propulsion systems

The subject is organised in a series of lectures (about 48 hours) and exercises (about 12 hours).

Hybrid propulsion systems

Hybrid propulsion systems

All the materials used for the lectures and the applied exercises will be provided to the students during the semester. For additional readings the students can refer to the following textbooks: - I. Husain, 'Electric and hybrid vehicles: design fundamentals', CRC Press, Second Edition, 2010. - Chris Mi and M. Abul Masrur, ‘Hybrid Electric Vehicles – Principles and Applications with Practical Perspectives’, Wiley, Second Edition, 2018. - Guzzella, L., Sciarretta, A., Vehicle Propulsion Systems – Introduction to Modeling and Optimization. Springer, 2013, 10.1007/978-3-642-35913-2 - Onori, S., Serrao, L., Rizzoni, G., Hybrid Electric Vehicles – Energy Management Strategies, Springer, 2016, DOI:10.1007/978-1-4471-6781-5 - Heywood, J., Internal combustion engine fundamentals, Mc Graw Hill, 2nd edition, 2018, ISSN10: 1260116107

Hybrid propulsion systems

Modalità di esame: Prova scritta a risposta aperta o chiusa tramite PC con l'utilizzo della piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus);

Hybrid propulsion systems

Hybrid propulsion systems

Exam: Computer-based written test with open-ended questions or multiple-choice questions using the Exam platform and proctoring tools (Respondus);

Hybrid propulsion systems

The exam consists of a written test at the PC using the web platform of Politecnico (Exam) with the support of the proctoring tool (Respondus). The test aims at evaluating the student’s preparation on the topics included in the teaching program, such as the knowledge of the application, the working principle and the technological options for the components used for the hybrid propulsion systems, as well as the features of the different hybrid powertrain architectures. The assessment aims also to evaluate the candidates’ competence in terms of capability in preliminary technical specifications of performance, features and characteristics of hybrid powertrain for vehicle applications. The test indicatively lasts 1 hour and consist of 32 multiple-choice questions concerning specific subjects of the teaching program. Each correct answer will score 1 points, each blank (not given) answer will bring 0 points, and each wrong answer will bring -0,25 points. Students may also be asked to solve simple analytical exercises similar to the computations presented during the applied exercises . It this case the students, at the end of the exam, has to upload on the exam platform a scan of the procedure used to solve the exercise. To take the exam the student must book the exam through the Teaching Portal. During the test, textbooks, notes and formularies cannot be consulted. It is permitted the use of the calculator. The examination is passed if the written test gets a mark from 18/30 up to 30/30 (including the laude). The mark will be communicated to the students through a message on the Teaching Portal.

Hybrid propulsion systems

Modalità di esame: Prova scritta a risposta aperta o chiusa tramite PC con l'utilizzo della piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus);

Hybrid propulsion systems

Hybrid propulsion systems

Exam: Computer-based written test with open-ended questions or multiple-choice questions using the Exam platform and proctoring tools (Respondus);

Hybrid propulsion systems

The exam consists of a written test at the PC using the web platform of Politecnico (Exam) with the support of the proctoring tool (Respondus). The test aims at evaluating the student’s preparation on the topics included in the teaching program, such as the knowledge of the application, the working principle and the technological options for the components used for the hybrid propulsion systems, as well as the features of the different hybrid powertrain architectures. The assessment aims also to evaluate the candidates’ competence in terms of capability in preliminary technical specifications of performance, features and characteristics of hybrid powertrain for vehicle applications. The test indicatively lasts 1 hour and consist of 32 multiple-choice questions concerning specific subjects of the teaching program. Each correct answer will score 1 points, each blank (not given) answer will bring 0 points, and each wrong answer will bring -0,25 points. Students may also be asked to solve simple analytical exercises similar to the computations presented during the applied exercises . It this case the students, at the end of the exam, has to upload on the exam platform a scan of the procedure used to solve the exercise. To take the exam the student must book the exam through the Teaching Portal. During the test, textbooks, notes and formularies cannot be consulted. It is permitted the use of the calculator. The examination is passed if the written test gets a mark from 18/30 up to 30/30 (including the laude). The mark will be communicated to the students through a message on the Teaching Portal.

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