Дисертації з теми "Veicolo ibrido"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-26 дисертацій для дослідження на тему "Veicolo ibrido".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Zamagna, Luca. "Studio del powertrain per veicolo ibrido ad alte prestazioni." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19086/.
Повний текст джерелаVandi, Gabriele <1986>. "Simulazione dinamica di un veicolo dotato di powertrain ibrido endotermico-elettrico." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6806/1/Vandi_Gabriele_Tesi.pdf.
Повний текст джерелаOne of the challenges of the modern automotive industry is to develop engines and vehicles with an always more stringent legislation about pollutant emissions. Hybrid vehicles are a valid alternative to these limitations and could represent a good way to reduce fuel consumption and pollutant emissions. In literature it is possible to find several studies that deal with the optimization of the components or of the control strategies of this kind of vehicles, but less importance is given to the effects on vehicle dynamics that could be caused by the addition of the components of the additional system. The idea behind this work is to add on a traditional vehicle an electric kit, composed by 2 electric motors that can be added in correspondence of the non-driven wheels, a battery and the necessary power electronics to control the 2 motors obtaining an hybrid vehicle: the attention will be focused on vehicle dynamics and in particular on the changes in vehicle dynamics due to the mass increase and to the variation of the center of gravity position. Moreover it will be investigated how to use the electric motors to correct undesired effects in vehicle behavior. To achieve the preset objectives, a 14 degrees freedom vehicle model, which could allow to apply a different torque to each wheel, has been developed in Matlab/Simulink environment and validated. The so-built simulator has then been used to simulate 2 configurations of the same vehicle (with different mass and center of gravity position) to compare their performances and to verify which effects on vehicle dynamics could be obtained applying driving and braking torques through the electric motors.
Vandi, Gabriele <1986>. "Simulazione dinamica di un veicolo dotato di powertrain ibrido endotermico-elettrico." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6806/.
Повний текст джерелаOne of the challenges of the modern automotive industry is to develop engines and vehicles with an always more stringent legislation about pollutant emissions. Hybrid vehicles are a valid alternative to these limitations and could represent a good way to reduce fuel consumption and pollutant emissions. In literature it is possible to find several studies that deal with the optimization of the components or of the control strategies of this kind of vehicles, but less importance is given to the effects on vehicle dynamics that could be caused by the addition of the components of the additional system. The idea behind this work is to add on a traditional vehicle an electric kit, composed by 2 electric motors that can be added in correspondence of the non-driven wheels, a battery and the necessary power electronics to control the 2 motors obtaining an hybrid vehicle: the attention will be focused on vehicle dynamics and in particular on the changes in vehicle dynamics due to the mass increase and to the variation of the center of gravity position. Moreover it will be investigated how to use the electric motors to correct undesired effects in vehicle behavior. To achieve the preset objectives, a 14 degrees freedom vehicle model, which could allow to apply a different torque to each wheel, has been developed in Matlab/Simulink environment and validated. The so-built simulator has then been used to simulate 2 configurations of the same vehicle (with different mass and center of gravity position) to compare their performances and to verify which effects on vehicle dynamics could be obtained applying driving and braking torques through the electric motors.
Coraggio, Gaetano. "Sperimentazione e controllo di un veicolo ibrido solare con tetto orientabile." Doctoral thesis, Universita degli studi di Salerno, 2013. http://hdl.handle.net/10556/808.
Повний текст джерелаDa alcuni anni la questione energetico - ambientale è ormai diventata di dominio pubblico, perdendone magari dal punto di vista scientifico, ma diventando in grado di condizionare i comportamenti di una parte sempre crescente della popolazione. Obiettivo principale del lavoro di tesi è la ricerca incentrata su veicoli alternativi ai veicoli tradizionali il cui impatto sull’ambiente, in termini energetico - ambientali, è sempre crescente. Una valida alternativa è, sicuramente, quella dei veicoli ibridi, veicoli equipaggiati da un doppio propulsore (termico ed elettrico nei veicoli ibridi elettrici). L’integrazione della fonte solare fotovoltaica, come soluzione in grado di contribuire ulteriormente a ridurre consumi ed emissioni, è una soluzione che non ne esclude altre ma può sommare i propri benefici a quelli ottenibili, per esempio, con i veicoli ibridi elettrici. Si parla in questo caso di veicoli ibridi solari. Molti progetti di veicoli ibridi solari sono già stati portati avanti. Tra questi anche il prototipo sviluppato presso l’Università degli Studi di Salerno. A medio-lungo termine, le presumibili ulteriori riduzioni di prezzo ed i miglioramenti di rendimento delle celle fotovoltaiche, integrate a partire dalla fase di progetto in veicoli a basso consumo energetico, potranno portare ad un’autonomia quasi completa, almeno per quella larga parte degli automobilisti che usa l’auto prevalentemente in ambito urbano per poche ore al giorno. Ovviamente un aumento dell’energia captata dai pannelli solari incide positivamente su consumi ed emissioni. Un modo per aumentare quest’energia captata è quello di ricorrere ad un tetto solare auto orientabile, che sia in grado, cioè, di seguire i movimenti del sole durante l’arco della giornata. L’attività di ricerca si è incentrata sullo studio del prototipo di veicolo ibrido solare e sulla possibilità di quest’ultimo di equipaggiarsi di un tetto solare mobile in grado di disporsi perpendicolarmente ai raggi solari in fase di parcheggio per aumentare l’energia captata. La prima parte ha riguardato, quindi, lo studio di una strategia di controllo per la gestione energetica ottimale a bordo di un veicolo ibrido solare (Hybrid Solar Vehicle – HSV) con struttura serie. Questo veicolo è in dotazione al dipartimento di Ingegneria Industriale dell’Università degli Studi di Salerno. Si tratta di un Porter Van Glass della Microvett, un veicolo elettrico convertito a ibrido solare grazie all’integrazione sul tetto di pannelli solari e nel vano posteriore di un gruppo motogeneratore. La strategia di controllo è denominata Rule-Based. L’architettura di controllo RB è costituita da due loop principali: uno esterno, che determina, in funzione del contributo solare atteso durante la fase di parcheggio, lo stato di carica della batteria (SOC) da raggiungere al termine della fase di guida; il secondo, interno, i cui obiettivi sono, da una parte, l’individuazione dello scheduling ottimale del gruppo generatore, e, dall’altra, il controllo dell’oscillazione del SOC intorno al valore finale indicato dal primo ciclo. Le prestazioni ottenibili dall’architettura RB sono state analizzate attraverso un’approfondita analisi di simulazione. Tale simulazione, eseguita in real time sul veicolo, ha dimostrato l’elevata potenzialità offerta dalla strategia proposta. La seconda parte è stata dedicata alla progettazione ed alla realizzazione di un tetto solare mobile per un veicolo ibrido solare. Questo modello è stato realizzato con il software SolidWorks. Come 2 conoscenze di base sono state utilizzate l’influenza dell’angolo di incidenza sulla frazione di energia raccolta rispetto all’energia incidente, la radiazione solare differente per ogni luogo, e la cinematica dei robot paralleli. Ovviamente inclinando opportunamente i pannelli si accumula più energia solare. Quindi un pannello mobile è più conveniente di uno fisso. Ciò è stato sottolineato dall’utilizzo di un simulatore americano PVWATTS (valido per i paesi americani). Dato che la radiazione solare varia a seconda del luogo di riferimento, a tale simulatore occorre fornire come dati di ingresso latitudine e longitudine del luogo, angolazione del pannello fisso o pannello mobile orientabile su due assi. In tal modo si è potuto verificare il guadagno di un pannello orientabile su due assi rispetto a uno fisso. Da questi risultati è stata confermata la convenienza di avere un tetto mobile. Il modello è stato progettato con l’ausilio di due software: MATLAB e SolidWorks. Successivamente sono stati realizzati ed automatizzati tre prototipi in scala. È stato dimostrato come l’uso di un tetto solare mobile durante le fasi di parcheggio può dare un contributo rilevante per aumentare l’energia solare catturata nei veicoli ibridi solari. Inoltre il contributo percentuale può essere particolarmente significativo alle alte latitudini, contribuendo così a estendere il potenziale mercato di questi veicoli. Al fine di migliorare i benefici del tetto in oggetto, il consumo di energia legato al suo movimento deve essere minimizzato, e devono essere evitati i movimenti non necessari. A tal fine è stata presentata una procedura di controllo basata sull’uso combinato dei dati di energia solare forniti dal pannello solare, sulle informazioni ricavate da un modulo GPS ed elaborando le immagini del cielo scattate da una fotocamera digitale. A questo scopo è stato sviluppato un sistema di controllo implementato in LabVIEW e testato sui prototipi su scala ridotta in condizioni di luce artificiale. Inoltre è stata presentata una strategia che permette di determinare l’intervallo ottimale di tempo tra due orientamenti consecutive del tetto. Quest’intervallo dipende dalle ore del giorno, dalle stagioni dell’anno e dalle condizioni reali del cielo. Dalle considerazioni fatte si evince, quindi, che è consigliabile adottare la strategia di controllo presentata, al fine di massimizzare i vantaggi di un tetto solare mobile nei veicoli ibridi solari. [a cura dell'autore]
X n.s.
Tambini, Lorenzo. "Ottimizzazione della strategia di controllo di un veicolo ibrido orientata alla riduzione consumi." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/19972/.
Повний текст джерелаGIACOBONE, GIAN ANDREA. "Human-Centred Design e mobilità sostenibile: immaginare il futuro concept di un veicolo ibrido sportivo." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488011.
Повний текст джерелаThis thesis is part of a multidisciplinary project named “Automotive Academy: a learning-by-doing project for innovation engineering automotive”, a strategic industrial programme financed by Emilia-Romagna region, Italy. The project is made by a collaborative research network composed by several universities, research centres and local industries scattered on the territory. The overall research aims to gather many engineering and design solutions, developed by the network, which can be transferred from academia to the automotive industry. In particular, the main goal of the project is to develop a “fun” and “eco” concept car as an R&D platform, which aspires to become a starting point and a demonstrator for future technical or technological innovations – in terms of sustainable and high-performance solutions – that will be developed within the network in the coming years. In particular, the objective is to design the future concept of a hybrid sports vehicle, which must be characterized by low environmental impact and high-performance features. Five independent work packages constitute the research program. Each area refers to a specific field of expertise that deals with a particular system of the vehicle: (1) automotive product design and human-centred methodologies; (2) propulsion and powertrain; (3) vehicle body and dynamics; (4) smart materials and innovative components; (5) drive-by-wire instruments. This specific research refers to the first work packaging and it focuses its attention on the automotive design or styling design, namely the specialized discipline that is specifically implicated in giving a shape to the car during the early stages of the automotive product development. Unlike the other engineering work packages, this research is design-driven and human-centred oriented. The contribution, indeed, constitutes the framework of the overall project because it has the task to envision and conceptualize both architecture and styling of the expected sports car by using specifically a human-centred design approach. In fact, starting from identifying the context of use, the research analyses the main users and their behaviours to transform their wishes or needs into an innovative solution, which will be capable of satisfying their demands. The peculiarity of the research lays on the use of two specific human-centred approaches – that are Quality Function Deployment (QFD) and Vision in Product Design (ViP) – but also on its exploratory combination for experimenting a new design methodology. QFD is a human-centred tool based on a mathematical correlating matrix that is able to orient product design toward the real exigencies of the end-users. While ViP is a conceptual and strategic methodology that enables innovation by envisioning new ideas for the future. Both models are selected for this research because they are perfectly suitable in automotive for structuring idea-generating throughout the styling process. They are also able to support the design process in making significant decisions for product development. The main purpose of the exploratory combination is to develop the concept vehicle in a unique design process, in order to come up with a novel and integrated concept solution. At the end of the research, the proposed vehicle and its properties expect to become a technical layout for developing the automotive R&D platform in the coming years within the multidisciplinary network. The final solution will provide several technical and styling guidelines to the overall project that will be necessary not only to design the final vehicle prototype but also to promote the use of a human-centred design approach to the other engineering researches.
Sangiorgi, Cristian. "Studio ed ottimizzazione di una trasmissione su mezzo ibrido per uso desertico." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7509/.
Повний текст джерелаSucci, Rocco. "Analisi e sviluppo di strategie per l'ottimizzazione del consumo energetico di una vettura ibrida elettrica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17871/.
Повний текст джерелаRotondi, Andrea. "Studio di un azionamento brushless di tipo predittivo per la trazione in un veicolo elettrico ibrido." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8484/.
Повний текст джерелаFranceschi, Alessandro. "Sviluppo di un modello matematico per la valutazione della dinamica longitudinale di un veicolo ibrido elettrico a 48 V." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15113/.
Повний текст джерелаMagnani, Alberto. "Nuove soluzioni range extender per veicoli ibridi in serie." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Знайти повний текст джерелаTEBALDI, DAVIDE. "Modellistica Matematica Controllo e Simulazione di Veicoli Ibridi Elettrici." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2022. http://hdl.handle.net/11380/1271187.
Повний текст джерелаThis work of thesis deals with the mathematical modeling, control and simulation of Hybrid Electric Vehicles. First, the classification and description of the main architectures for Hybrid Electric Vehicles are carried out, highlighting pros and cons of the different architectures. The modeling is performed exploiting the properties of the Power-Oriented Graphs modeling technique. Among all the involved physical elements, particular attention is given to the modeling of planetary gear sets, multilevel flying-capacitor converters and permanent magnet synchronous motors. As far as planetary gear sets are concerned, a systematic procedure has been developed for the systematic modeling of any planetary gear set using a unified approach. The proposed procedure allows to obtain two models of the system: a full elastic model, representing a more detailed modeling of the considered planetary gear set accounting for the gears elastic contact points, and a reduced-order model allowing to use fixed-step solvers with a larger simulation step size, which is more suitable for real-time execution. As for multilevel flying-capacitor converters, a compact model is proposed. Next, a robustness assessment when the converter is controlled using a classical minimum distance control is performed, and a new variable-step control strategy allowing to guarantee capacitors voltages balancing is proposed. For what concerns permanent magnet synchronous motors, a poweroriented model is proposed, together with its efficiency analysis based on which model parameters estimation can be performed starting from the motor efficiency map. Some Hybrid Electric Vehicle architectures in the agricultural and construction fields are then proposed as case studies, and a solution for the energy management problem is studied for all of them. Finally, simulation results for each Hybrid Electric Vehicle architecture are reported and commented in detail.
ANDRETTA, NICOLA. "METODI DI PROGETTAZIONE PER TRASMISSIONI IDROMECCANICHE IBRIDE DI VEICOLI PESANTI." Doctoral thesis, Università degli studi di Padova, 2022. http://hdl.handle.net/11577/3459391.
Повний текст джерелаHydromechanical transmission (HT) is a continuous transmission suitable for heavy machines. However, its slightly lower performance than traditional transmissions hindered its diffusion. One technique for increasing efficiency is hybridization, which, however, complicates the sizing of the transmission. The design of a hybrid HT must consider all the aspects that contribute to the good performance of the transmission: the layout, the size of the components and the management criteria. The project problem was approached as follows. 1) Preliminary analysis: A preliminary analysis on the 4 main layouts of the transmission (IC, OC, Dual Stage and Compound) in hybrid configuration in series and in parallel has shown that the latter consumes slightly less than the series configuration, which however requires fewer components. Only the OC and Compound layouts were found to be suitable for hybridization because they recover energy in each functional phase. Therefore, the OC layout in series configuration is the subject of the thesis analysis, leaving the second to future studies. 2) Experimental activity: During a period of study in the laboratories of the MAHA Center (USA), loss models of hydraulic machines were defined, essential for the simulations and, through bench measurements, a complete model of HT was validated. 3) Design methods: The methods presented in the work are three, having different characteristics and degree of complexity. 3.1) Standard procedure: once the characteristics of the vehicle and the engine are known, the procedure starts with the assumption of a transmission layout and calculates the size of the components based on their functional relationships. The accumulators are calculated based on the amount of energy they have to recover. Nothing guarantees about obtaining high performance values. 3.2) “Sub-optimal” procedure: The transmission layout is determined through an optimization procedure that treats the layout as any variable and therefore provides the component sizes, transmission ratios and layout as output variables. Accumulators are calculated separately via a volume minimization operation. 3.3) “Full optimal” procedure: A global optimization problem is defined on the layout that is pre-established which has as decision variables the sizes of the components, the transmission ratios, the volumes, and the preload pressures of the two accumulators. The objective function can be the minimum consumption or minimum consumption and minimum size simultaneously. A comparison between the three methods showed that the latter two produce fuel savings of 6-7% compared to a non-optimized solution. 4) Transmission management criteria: the HT kinematically separates the wheels from the engine, which can be managed according to the criterion of minimum consumption or minimum emissions. However, the different genesis of the four regulated emissions makes their simultaneous minimization difficult. By replacing individual emissions with the damage to human health they cause, it is possible to define a management criterion for minimum emissions parallel to that of minimum consumption. The analyzes carried out have shown that the criterion of minimum damage produces significant reductions in damage in the face of modest increases in consumption. This confirms the usefulness of the criterion, which would also help the manufacturer to overcome the increasingly stringent legal limits. As seen in this work, it can be briefly concluded that hybrid HT is an interesting solution for heavy machines, characterized by work cycles with frequent stops and restarts, provided that its design is pushed to the limit in the search for maximum efficiency, i.e., turned into an optimization problem.
ANDRETTA, NICOLA. "METODI DI PROGETTAZIONE PER TRASMISSIONI IDROMECCANICHE IBRIDE DI VEICOLI PESANTI." Doctoral thesis, Università degli studi di Padova, 2022. http://hdl.handle.net/11577/3459390.
Повний текст джерелаHydromechanical transmission (HT) is a continuous transmission suitable for heavy machines. However, its slightly lower performance than traditional transmissions hindered its diffusion. One technique for increasing efficiency is hybridization, which, however, complicates the sizing of the transmission. The design of a hybrid HT must consider all the aspects that contribute to the good performance of the transmission: the layout, the size of the components and the management criteria. The project problem was approached as follows. 1) Preliminary analysis: A preliminary analysis on the 4 main layouts of the transmission (IC, OC, Dual Stage and Compound) in hybrid configuration in series and in parallel has shown that the latter consumes slightly less than the series configuration, which however requires fewer components. Only the OC and Compound layouts were found to be suitable for hybridization because they recover energy in each functional phase. Therefore, the OC layout in series configuration is the subject of the thesis analysis, leaving the second to future studies. 2) Experimental activity: During a period of study in the laboratories of the MAHA Center (USA), loss models of hydraulic machines were defined, essential for the simulations and, through bench measurements, a complete model of HT was validated. 3) Design methods: The methods presented in the work are three, having different characteristics and degree of complexity. 3.1) Standard procedure: once the characteristics of the vehicle and the engine are known, the procedure starts with the assumption of a transmission layout and calculates the size of the components based on their functional relationships. The accumulators are calculated based on the amount of energy they have to recover. Nothing guarantees about obtaining high performance values. 3.2) “Sub-optimal” procedure: The transmission layout is determined through an optimization procedure that treats the layout as any variable and therefore provides the component sizes, transmission ratios and layout as output variables. Accumulators are calculated separately via a volume minimization operation. 3.3) “Full optimal” procedure: A global optimization problem is defined on the layout that is pre-established which has as decision variables the sizes of the components, the transmission ratios, the volumes, and the preload pressures of the two accumulators. The objective function can be the minimum consumption or minimum consumption and minimum size simultaneously. A comparison between the three methods showed that the latter two produce fuel savings of 6-7% compared to a non-optimized solution. 4) Transmission management criteria: the HT kinematically separates the wheels from the engine, which can be managed according to the criterion of minimum consumption or minimum emissions. However, the different genesis of the four regulated emissions makes their simultaneous minimization difficult. By replacing individual emissions with the damage to human health they cause, it is possible to define a management criterion for minimum emissions parallel to that of minimum consumption. The analyzes carried out have shown that the criterion of minimum damage produces significant reductions in damage in the face of modest increases in consumption. This confirms the usefulness of the criterion, which would also help the manufacturer to overcome the increasingly stringent legal limits. As seen in this work, it can be briefly concluded that hybrid HT is an interesting solution for heavy machines, characterized by work cycles with frequent stops and restarts, provided that its design is pushed to the limit in the search for maximum efficiency, i.e., turned into an optimization problem.
Licata, Ivano. "Sistema di controllo ibrido ad alte prestazioni per caricabatterie wireless di veicoli elettrici." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Знайти повний текст джерелаSABATO, MASSIMO. "Analisi Termica di Moduli di Potenza per Veicoli a Trazione Ibrida." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2022. http://hdl.handle.net/11380/1277128.
Повний текст джерелаOver the last years, hybrid electric vehicles are becoming increasingly widespread attracting the interest of researchers in this field. Significant innovations have been recently achieved about components like electrical machines, energy storages, and power converters. Focusing on power converter, its function is to ensure the energy conversion from alternating current to direct current sides, and vice versa, by using power semiconductors as IGBTs, DIODEs, and MOSFETs. Despite power electronic devices are usually characterized by efficiencies over 90%, they can be characterized by heat flux densities in the order of hundreds of W/cm^2. The main purpose of the present PhD thesis is to perform a detailed thermal analysis on power conversion systems. An electro-thermal simulation tool (Virtual Test Bench) which can address the power converter design is developed and presented. The tool allows to evaluate any multilevel power converter topologies by covering a wide range of possible operating conditions. Moreover, many power module technologies can be evaluated at low computational cost and by avoiding costly laboratory tests. The proposed tool enables the anticipated identification of designs to be rejected because of their low efficiency. Therefore, the experimental efforts can be only focused on the most promising solutions. In the present work, the simulation tool is successfully validated against experiments and literature results. A large simulation campaign is then conducted by considering a number of power converter configurations. Their performance are evaluated by means an accurate power losses computation in both steady-state and time-dependent conditions. In addition, the behavior of single semiconductors equipping the power converter is detailedly investigated. Performance and reliability of such devices are ensured by means a dedicated cooling system. In the current work, only active cooling systems are taken into account. In detail, the focus is on design and application of submerged impinging jet cooling technique. A 3D-CFD simulation approach is adopted. The simulation methodology is firstly applied on a simplified geometry made by a single jet. For this geometry, results are compared to experimental test case obtaining a good overall correlation. Then, the validated 3D-CFD methodology is adopted to complete a detailed parametric study of jet cooling solution applied in power converters. The effect of nozzle diameter, aspect ratio, arrangement, and number of jets are accurately investigated. The research activity allows to understand in detail the power converter behavior from a thermal point of view. The power converter design process can be strongly supported by the developed Virtual Test Bench, in fact the individuation of the best power module configuration is fast and accurate. Moreover, the tool can be furthermore developed to allow a multi-objective optimization of power converter. Finally, submerged impinging jets represent an efficient and flexible cooling approach for semiconductors with low pumping power level.
Tomassini, Davide. "Analisi di motopropulsori ibridi meccanici, pneumatici e idraulici." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаPelloni, Simone. "Modellazione termica di batterie ad alta tensione con tecnologia Li-Ion per veicoli ibridi." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13616/.
Повний текст джерелаRotondi, Andrea. "Studio e simulazione di un inverter di tipo Z per veicoli elettrici." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4294/.
Повний текст джерелаMANGERUGA, VALERIO. "Un’architettura innovativa per Power Unit ibride per veicoli di piccole dimensioni: progettazione, analisi, produzione e sperimentazione." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2020. http://hdl.handle.net/11380/1200751.
Повний текст джерелаThis thesis presents the development of a hybrid power-unit starting from a small engine derived from a motorcycle application. In particular, the system is made up of a brand new, single-cylinder 480 cc internal combustion engine developed on the basis of the Ducati “959 Superquadro” V90 2-cylinders engine. The thermal engine is assisted by a custom electric motor (30 kW), powered by a Li-Ion battery pack. The Ducati “959 Superquadro” engine is chosen because of its high power-to-weight ratio, and for taking advantage of its V90 2-cylinder layout. In fact, the vertical engine head is removed and it is replaced by the electric motor directly engaged to the crankshaft using the original valvetrain transmission chain, thus achieving a very compact package. This solution is suitable for many V-type engines and aims to obtain a small hybrid power unit, leaving the way open for possible motorcycle/small vehicle applications. The resulting internal combustion engine of this project is a single cylinder engine which would result to be unbalanced if compared to the original V90 configuration. For this reason, several unconventional balancing systems are investigated. In particular, one of the solutions consists in replacing the unused piston with a balancer rod obtaining an articulated quadrilateral mechanism. This solution allows to reduce the friction losses and to specially drop off the pumping losses. Parallelly, the possibility of keeping the original piston is considered which definitely represents a less invasive solution but determines a certain power loss due to both friction and pumping. The mechanical behaviour of the original chain is investigated performing a dynamic analysis of the whole crank mechanism. In particular, the twin cylinder model considering the original valvetrain system is compared with the single cylinder model engaged with the electric motor, in order to assess the possibility to use the chain for this specific purpose. A specific electric motor case is designed and manufactured via Additive Manufacturing technology, in order to include the chain housing, the electric motor cooling system and the lubricating system. Furthermore, the case flange is designed to perfectly fit with the original engine deck in order to allow the engine cooling circuit to match with the electric motor one. Specifically, a thermo-structural analysis is performed in order to assess the mechanical strength of the electric motor case. The output power and size of the electric motor are estimated developing a spreadsheet which considers the power dissipated by the vehicle taking into account the mass of the car, the rolling resistance, the drag force and the lift force. Moreover, the maximum amount of energy needed is calculated thus allowing the capacity of the battery to be determined. In particular, the model allows the best operating point for both the electric motor and the internal combustion engine to be identified. Several strategies are developed concerning the power split during different operating cycles and taking into account the vehicle performance, the fuel consumption and the electric energy consumption. Finally, a first prototype of the developed power-unit is manufactured and tested at the bench test thus providing useful experimental data for the validation of the different numerical models employed.
Tiralongo, Teresa <1990>. "Le automobili ibride, una nuova frontiera del trasporto ecologico: analisi dell'architettura dei veicoli e relativo repertorio terminografico italiano-cinese." Master's Degree Thesis, Università Ca' Foscari Venezia, 2016. http://hdl.handle.net/10579/8428.
Повний текст джерелаCeroni, Francesco. "Metodologie HCI per il design di un cruscotto di infotainment per veicoli elettrici." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16109/.
Повний текст джерелаCIMINELLI, MARCO VALERIO. "Studio delle problematiche energetiche e sviluppo di metodologie per l’ottimizzazione della gestione e progettazione di sistemi energetici fissi e mobil." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1370.
Повний текст джерелаAs energy consumption is rising more than 2%/year, energy saving is one of the main tasks of present times and it is likely to become even more important in the next decades, as the economic growth is being pursued in developing countries, as China, India and Brazil. As a consequence, researchers, industries and politicians are required to make significant efforts in this crucial field. Energy efficiency in ending utilisation, nuclear energy increase, alternative energy development and vehicle technology optimization are the main issues of the guidelines, suggested by the principal international energy agency, as IEA. In this scenario, the Hybrid and Electric Vehicle Research Group of ENEA, together with the three University of Rome, planned the realization of an hybrid power train suitable for small city car. The main target of the project, is to realise a power train able to achieve low fuel consumption (2.5 litre/ 100 km), low emissions (comparable to EURO 5 rules), with simple configuration and low power train cost. To fulfil this target a hybrid series power train has been chosen. The task of our research group of Tor Vergata University is to realise to calibrate a power management system able to satisfy the requested performances (power, max speed, acceleration, etc.). The difficulty is due to the use of ultracapacitors as energy storage system because of the low energy capacity. In order to achieve this goal, different control strategies are tried to manage the auxiliary power unit, with numerical simulation tools. The principal aspects and results of the power management system are shown. Some driving tests results are finally reported to instance the effectiveness of the developed management. Moreover, besides the management of automotive complex systems, we are involved, during the last three years, in the development of a methodology allowing the optimal management control strategy for power systems in industrial plants, commercial buildings, hospitals, ecc. The energy/mass balances existing between building and power plant has been depicted through a mathematical model based on vector equations, taking into account the behaviour of each system component. The main result is the definition of the power plant component set points satisfying the energy load under predefined optimization criterion (i.e. system efficiency, costs, pollutant emissions). A dedicated code has been developed to perform system analysis and simulation, in order to support the energy manager and the power plant designer. Input data are the industrial plant loads, both electric and thermal, the technical characteristic of the installations, and the cost of electricity and fuels. An yearly simulation is performed on an existing energy system of an Italian hospital underlying the methodology capability.
Morandin, Mattia. "Electric Drives with Permanent Magnet Synchronous Machines Connected to Internal Combustion Engines." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3423439.
Повний текст джерелаIn questi ultimi anni l’aumento del costo del petrolio e il riscaldamento globale della terra dovuto ai gas serra ha spinto il settore scientifico, i governi e quindi il mercato nella direzione di una più alta efficienza dei sistemi con lo scopo di ridurre l’utilizzo di questo combustibile e quindi le sue emissioni di CO2 associate. Oggigiorno i settori più coinvolti in questa rivoluzione tecnologica sono il settori della generazione di energia elettrica e il settore dei trasporti. Infatti questi due settori sono i principali responsabili di emissioni di CO2 globali della terra che sono associate per circa il 45% alla generazione elettrica e per circa 30% ai trasporti. Inoltre va ricordato che sebbene il petrolio non sia una fonte di energia rinnovabile attualmente circa il 40% dell’energia mondiale dipende dal petrolio e questo livello di dipendenza sale a circa 80% nel settore dei trasporti dove la maggior parte dei veicoli è spinta da un motore alimentato da derivati del petrolio. Per questi motivi la ricerca scientifica negli ultimi dieci anni si sta concentrando su questi problematiche in particolare nei settori emergenti quali cogenerazione distribuita e veicoli ibridi. In particolare vengono studiati nuovi impianti di energia distribuita capaci di aumentare l’efficienza energetica producendo in maniera combinata energia elettrica e termica direttamente dove richiesta e solo se necessaria in questo modo si riducendo le perdite di rete. Nel settore dei veicoli ibridi invece l’utilizzo del motore elettrico può aiutare ad aumentare l’efficienza del motore termico nei vari punti di lavoro, questi sistemi consentono infatti di migliorare fino al 30% le prestazioni in termini di consumi ed emissioni rispetto ad un veicolo tradizionale. Con questo contesto storico la tesi si è focalizzata nello studio di una struttura della catena di potenza di un veicolo o di un sistema di cogenerazione di piccola taglia ossia l’analisi di un sistema composto da un motore endotermico direttamente calettato con una macchina elettrica. La macchina elettrica viene generalmente utilizzata con due funzioni principali: avviare il motore a combustione e generare energia elettrica. Nel caso di un veicolo ibrido vi sono altre due funzioni che si aggiungono a quelle appena elencate ossia la fase di incremento di coppia durante le accelerazioni e una fase di recupera di energia durante le frenate. Tra le varie tipologie di macchine elettriche esistenti nel mercato, le macchine sincrone a magnete permanente occupano un posto di rilievo in questi settori. Infatti questa tipologia di macchina elettrica consente di ottenere: un alto rendimento, un’alta densità di coppia, notevole capacità di sovraccarico, una buona robustezza costruttiva, volumi compatti e quindi peso ridotto. Inoltre questo tipo di macchina può lavorare a velocità variabile e può operare con prestazioni aragonabili sia come motore che come generatore. Per questo motivo nella tesi verranno presentati azionamenti elettrici basati su motori a combustione interna calettati a macchine elettriche sincrone a magneti permanenti. La tesi di dottorato dell’autore è stata svolta presso il laboratorio di azionamenti elettrici di Padova, il quale da più di venti anni è attivo nel campo della progettazione di macchine elettriche e del loro controllo mediante progetti di ricerca con partner industriali e pubblicazioni scientifiche su riviste e su conferenze internazionali. Quindi sebbene siano presenti in letteratura molti libri che parlano di azionamenti elettrici grazie all’esperienza dell’autore maturata in questo laboratorio l’autore ha voluto enfatizzare con maggiore dettaglio gli aspetti e le nozioni che secondo la sua opinione sono fondamentali per la progettazione di un azionamento elettrico. Inoltre secondo il parere dell’autore al tesi di dottorato a differenza di un articolo su conferenza o su rivista deve essere autonoma e deve poter essere compresa anche da un non esperto del settore pertanto sono stati riportati con dettaglio anche aspetti base di una azionamento elettrico e del controllo motore. Quindi il lavoro riportato in questa tesi di dottorato è diviso sostanzialmente in due parti la prima composta dai primi quattro capitoli e la seconda parte composta dagli ultimi due capitoli. Nella prima parte sono state riportate le nozioni fondamentali necessarie per una buona conoscenza sul settore degli azionamenti elettrici in particolare nella parte di controllo motore, limiti di funzionamento di un motore sincrono a magneti permanenti e inverter di potenza. Mentre la seconda parte si è focalizzata sulla descrizione della progettazione di un azionamento per un sistema di cogenerazione domestica e per motociclette ibride. Nell’ambito della cogenerazione sono state descritte alcune tecniche che consentono di ridurre il problema delle vibrazioni dovute al motore a combustione interna. Nel settore della motocicletta ibrida sono state mostrate le principali scelte di progettazione effettuate per realizzare un prototipo efficace e funzionante di motocicletta ibrida.
D'Agostino, Mario. "Sviluppo e sperimentazione di un sistema di ibridizzazione e del relativo sistema di controllo per veicoli convenzionali." Doctoral thesis, 2016. http://hdl.handle.net/10556/2223.
Повний текст джерелаRecently, the possibility of upgrading conventional vehicles to Hybrid Electric Vehicles is gaining interest. Among the different options for hybridization, researchers are focusing on electrification of rear wheels in front‐driven vehicles, transforming the vehicle in a Through‐The‐Road (TTR) parallel HEV. This thesis deals with the development of an automotive hybridization kit (equipment, along with associated techniques and methodologies), aimed at converting conventional cars into hybrid solar vehicles (Mild‐Solar‐Hybrid). The main aspect of the projects consists into the integration of state‐of‐the‐art components (in‐wheel motors, photovoltaic panels, batteries), and into the development of an optimal controller for the power management. A prototype of the hybridizing equipment – patented by the University of Salerno (Italy)‐ is installed on a FIAT Grande Punto. A mild parallel hybrid structure is obtained by substituting/integrating the rear wheels with 7kW in‐wheel motors and adding a lithium battery to manage on‐board energy. Thus, the vehicle can operate in electric mode (when ICE is switched off or disconnected by the front wheels) or in hybrid mode (when the ICE drives the front wheels and the rear in‐wheel motors operate in traction mode or in generation mode, corresponding to a positive or negative torque). The battery can be recharged both by rear wheels, when operating in generation mode, and by photovoltaic panels. The vehicle is also equipped with an EOBD gate (On Board Diagnostics protocol), which allows accessing data such as pedal position, vehicle speed, engine speed, manifold pressure and other variables. The Vehicle Management Unit (VMU), which is part of the invention and implements control logics compatible with typical drive styles of conventional‐car users, receives the data from OBD gate, from battery (SOC estimation) and drives in‐wheel motors by properly acting on the electric node. In order to develop an effective and safe control strategy for wheel‐motors, a precise real‐time knowledge of the Driver Intention is required. In particular, the detection of the active gear is needed. The thesis, focused on the main aspects of prototype design and realization, also provides insights on control issues related to the integration of the above‐mentioned components, drivability and safety. [edited by author]
XIV n.s.
ALESSANDRA, Campanari. "“IDENTITY ON THE MOVE” FOOD, SYMBOLISM AND AUTHENTICITY IN THE ITALIAN-AMERICAN MIGRATION PROCESS." Doctoral thesis, 2018. http://hdl.handle.net/11393/251264.
Повний текст джерела