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Dissertations / Theses on the topic '621.436:662.756.3'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Сукачов, Іван Іванович. "Поліпшення паливної економічності форсованих дизелів шляхом узгодження характеристик вприскування палива та форми камери згоряння". Thesis, НТУ "ХПІ", 2005. http://repository.kpi.kharkov.ua/handle/KhPI-Press/3555.

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Дисертація присвячена вивченню особливостей процесів сумішоутворення і згоряння у форсованих дизелях та вибору раціональних параметрів характеристик вприскування палива і форми камери згоряння. Об'єктом дослідження є процеси сумішоутворення та згоряння в судових і тепловозних дизелях типу ЧН25/27, ЧН25/34, ЧН26/34, ЧН26/27 і ЧН32/32. Розглянуті специфіка і особливості процесів сумішоутворення і згоряння у форсованих дизелях. Виявлені основні причини зниження швидкостей випаровування і згоряння збільшених циклових порцій палива і визначені методи і способи узгодження характеристик вприскування

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2

Demosthenous, Alexis. "Soot formation and oxidation in a high-pressure spray flame." Thesis, Queen Mary, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424461.

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3

Vargas, Gabriella Margarita Ascanio. "Performance monitoring and full diagnosis of a diesel engine turbocharger." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494826.

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Turbocharging systems are of high importance in the enhancement of engine power and efficiency. Faults in such systems may cause increased emissions levels beyond those set by legislation, and may also compromise fuel efficiency. This thesis investigates the application of system identification and vibration signal analysis techniques for the performance monitoring of turbocharged diesel engines by exploring turbocharger behaviour. The first technique is based on the use of system identification to build models representing the input and output relationship of an engine process. In this case,

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4

Talbot-Weiss, Jonathan. "SFC improvements from turbo-generating heavy-duty diesel engines." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496856.

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This thesis describes the development of high efficiency turbochargers and turbogenerators to significantly increase the power to weight ratio and reduce both the fuel consumption and emissions from heavy duty diesel engines. A literature overview is provided for turbomachinery based exhaust energy recovery projects in the public domain. The technologies are discussed in detail and compared using real test data. The thesis describes some design issues that were experienced during engine testing one with a heat shield and one with a volute - and how finite element analysis was used to generate

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5

Plianos, Alexandros. "Nonlinear modelling and control of turbocharged diesel engines." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496800.

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The main focus of this thesis is the investigation of nonlinear control designs on the airpath of a diesel engine equipped with exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT). This problem presents strong couplings between controlled variables and actuators, since both EGR and VGT flows are driven by gases in the exhaust manifold. An additional coupling arises from the common shaft of the compressor and the turbine. The multivariable, highly nonlinear dynamics of the system gives motivation for model-based nonlinear control. Firstly, an eighth order mean-value model o

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6

Parra, Fernando Lopez. "Computational study on the effect of fuel stream perturbations on soot and NOx emissions in turbulent diffusion flames and applications to IC diesel engines." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488992.

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The work contained in this thesis presents a computational study on the effects of fuel stream perturbations in non-premixed flames in terms of pollutant formation (soot and NOx), including the application to a practical case scenario, such as direct injection diesel engine. The initial part of the work concentrates on the implementation in FLUENT of a soot model that is based on the Eddy Dissipation concept of Magnussen, which accounts for the effects of small scale turbulence in the formation and depletion of soot particles.

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7

Nivesrangsan, Pornchai. "Multi-source, multi-sensor approaches to diesel engine monitoring using acoustic emission." Thesis, Heriot-Watt University, 2004. http://hdl.handle.net/10399/1124.

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8

Tan, Yiping. "Automotive diesel turbocharger investigation." Thesis, University of Bath, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437605.

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9

Zweiri, Yahya Hashem. "Non-linear modelling and estimation for diesel engines." Thesis, King's College London (University of London), 2003. https://kclpure.kcl.ac.uk/portal/en/theses/nonlinear-modelling-and-estimation-for-diesel-engines(6cc4a92f-924e-4223-93c2-3c010321a5a5).html.

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10

Stewart, Jill. "Combustion diagnostics of a dual fuel CI engine : an experimental and theoretical study." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/7840.

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The term 'dual fuel' refers to a compression ignition engine where a small quantity of diesel fuel called the pilot is used to ignite a second gaseous fuel which is the primary energy source. The motivation to use dual fuel has traditionally been economic, as the primary fuel is often less expensive than the distillate fuel it replaces. However, some benefits in terms of the reduced emissions of smoke and oxides of nitrogen (NOx) can also be achieved. In this research, a small, direct injection diesel engine was converted to dual fuel operation. This engine is typical of those used in stationa

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11

McGowan, D. J. "Integration of gen-set control." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411043.

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12

Brooks, Thomas D. "Split-main fuel injection strategies for diesel engines and their influence on emissions and fuel consumption." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417186.

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13

Sautermeister, Falko Alexander. "Piston ring lubrication-influence of sulphuric acid formation from high sulphur content fuel." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/3132/.

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Large 2-stroke marine diesel engines burn high sulphur content residual fuel. The sulphur converts to aqueous sulphuric acid, H2SO4, and condenses on the cylinder liner surface, where it causes corrosive attack when not neutralised by the high alkaline reserve in the lubricant. Cylinder liner wear and deposit formation are observed to reflect poor lubricant distribution, surface temperature and sulphur fuel content, which all influence acid concentration. Currently neglected by the industry, is the catalysing action of H2SO4 on lubricant degradation and the rheology of entrained droplets in th

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14

Rodríguez, Álvaro Díez. "Investigation of split injection in a single cylinder optical diesel engine." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/3666.

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Over the last decade, the diesel engine has made dramatic progress in its performance and market penetration. However, in order to meet future emissions legislations, Nitrogen Oxide (NOx) and particulate matter (PM) emissions will need to be reduced simultaneously. Nowadays researchers are focused on different combustion modes like homogeneous charge compression ignition (HCCI) combustion and premixed charge compression ignition (PCCI) which have a great potential for both low soot and low NOx. In order to achieve these combustion modes, different injection strategies have been investigated. T

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15

Karimi, Kourosh. "Characterisation of multiple-injection diesel sprays at elevated pressures and temperatures." Thesis, University of Brighton, 2007. https://research.brighton.ac.uk/en/studentTheses/fb409ae5-a775-4473-bcc6-85f4dae97790.

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This thesis describes work undertaken at the University of Brighton on a rapid compression machine based on a two-stroke diesel engine (Proteus) with an optical head to allow observation of the fuel spray. A long-tube, rate of injection rig was used to measure the injection rate of the fuel injection system. Quantification of cyclic variation and rate of injection were carried out for single and multiple-injection strategy. For multiple-injections, it was found that the injected mass of the first of the split was approximately 19% less than that of the single injection strategy for the same in

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16

McGhee, Michael James. "Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13179/.

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An experimental investigation of post-start cold idling behaviour has been carried out on a modern single-cylinder HPCR DI light duty diesel engine with a low compression ratio of 15.5:1 at temperatures between 10 and -20°C. The trend toward lower compression ratios from more common values of around 22:1 a few years ago has resulted in lower compression pressures and temperatures, which negatively affects cold idle operation. Improvements in cycle-by-cycle stability of indicated work output through fuel injection strategy and glow plug temperature changes have been explored. This is important

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17

Gambrill, Richard. "The sensitivity of diesel engine performance to fuel injection parameters at various operating points." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/11253/.

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This thesis describes research undertaken to establish the advantages and disadvantages of using high pressure common rail fuel injection systems with multiple injection capabilities. The areas covered are detailed as follows. Oscillations in the rail pressure due to the opening of the injector can affect the quantity of fuel injected in subsequent injection events. The source of these oscillations has been investigated. A method of damping or reducing the oscillations has been defined and was applied. This successfully reduced the level of unpredictability of the quantity of injected fuel in

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18

Хамза, Хамза Алі Адел. "Вибір та обґрунтування параметрів дизель-електричної станції з системою утилізації теплоти". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31934.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.03 – двигуни та енергетичні установки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017. Дисертація присвячена вибору і обґрунтуванню параметрів дизель-електричної станції з системою утилізації вторинної теплоти дизеля з використанням циклу Ренкіна, що використовує теплоту відпрацьованих газів та системи охолодження. В результаті аналізу особливостей перспективної енергетичної установки з двигуном Hyundai 25/33 для виробництва електричної енергії на заводі в Іраку р

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19

Hamza, Hamza Ali Adel. "Selection and justification the parameters of diesel power plant with heat recovery system." Thesis, NTU "KhPI", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31664.

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Dissertation for the degree of candidate of technical sciences in specialty 05.05.03 – engines and power plants. – National Technical University "Kharkiv Polytechnic Institute". – Kharkiv, 2017. The dissertation is devoted to the choice and substantiation of parameters of a diesel power plant with heat recovery system of recycling the secondary heat from diesel engine using the Rankin cycle, which uses the heat of exhaust gases and cooling water systems. As a result of the analysis of the features of a promising power plant with a Hyundai 25/33 engine for the production of electric power at a

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20

Хамза, Хамза Алі Адел. "Вибір та обґрунтування параметрів дизель-електричної станції з системою утилізації теплоти". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31663.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.03 – двигуни та енергетичні установки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017. Дисертація присвячена вибору і обґрунтуванню параметрів дизель-електричної станції з системою утилізації вторинної теплоти дизеля з використанням циклу Ренкіна, що використовує теплоту відпрацьованих газів та системи охолодження. В результаті аналізу особливостей перспективної енергетичної установки з двигуном Hyundai 25/33 для виробництва електричної енергії на заводі в Іраку р

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21

Simon, Antoine. "Optimisation énergétique de chaînes de traction hybrides essence et Diesel sous contrainte de polluants : Étude et validation expérimentale." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2010.

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L’hybridation électrique de la chaîne de traction automobile est l’une des solutions adoptées pour respecter les règlementations futures sur ses émissions. La stratégie de supervision de la chaîne de traction hybride répartit la puissance produite par le moteur à combustion interne et la machine électrique. Elle répond habituellement à un problème d’optimisation où l’objectif est de réduire la consommation de carburant mais nécessite à présent d’y ajouter les émissions polluantes. La chaîne de dépollution, placée à l’échappement du moteur, permet de diminuer la quantité de polluants émise dans

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22

Castro, Joana Daniela Fernandes de. "Avaliação do potencial de produção de biodiesel a partir de algas." Master's thesis, 2012. http://hdl.handle.net/1822/34478.

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Dissertação de mestrado integrado em Engenharia de Materiais<br>Com o presente trabalho pretendeu-se estudar à escala laboratorial a viabilidade técnica da produção de biodiesel a partir de microalgas, particularmente as microalgas Chlorella Ermersonii (C.E.) e Botryococcus Braunii (B.B.). Para tal foram estudadas e avaliadas as várias etapas que integram o processo de produção nomeadamente o cultivo e o crescimento das microalgas e a extração do óleo por distintas metodologias e técnicas com vista à sua posterior transformação em biodiesel. Os resultados indicam uma extração máxima de 4% de ó

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23

Lopes, David Quéli Matos. "Otimização de motores diesel para funcionamento com biodiesel." Master's thesis, 2014. http://hdl.handle.net/1822/34355.

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Dissertação de mestrado integrado em Engenharia Mecânica<br>O objetivo deste trabalho passa por comparar as prestações de um motor diesel, para um mesmo limite legal de fumos, quando alimentado por gasóleo e biodiesel. Ainda, pretende-se comparar os resultados obtidos, em binário, potência, consumo e rendimento, entre os vários combustíveis utilizados. Inicialmente, é realizada uma análise à literatura, onde se estuda a combustão, sistemas de injeção, e parâmetros de desempenho do motor. Ainda, é feito um estudo a vários combustíveis, entre eles o gasóleo, o biodiesel e o bioóleo, e à fo

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24

Πήλιουρας, Φίλιππος. "Ανάλυση στατικής και δυναμικής ευστάθειας ασύγχρονων ηλεκτρικών κινητήρων μεγάλης ισχύος τροφοδοτούμενων μέσω δηζελογεννήτριας". Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2549.

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Στο πλαίσιο της παρούσας διπλωματικής εργασίας έγινε μια εκτεταμένη διερεύνηση μέσω προσομοίωσης της συμπεριφοράς ενός συστήματος αποτελούμενο από μηχανή Diesel , σύγχρονη μηχανή εκτύπων πόλων ως γεννήτρια και ασύγχρονη μηχανή δακτυλιοφόρου δρομέα ως κινητήρα. Παρουσιάστηκαν όλες οι τεχνικές που χρησιμοποιούνται στην μοντελοποίηση ενός τέτοιου συστήματος στο περιβάλλον του προγράμματος SIMULINK του MATLAB. Διερευνήθηκαν όλα τα φαινόμενα που λαμβάνουν χώρα κατά την εκκίνηση ενός τέτοιου συστήματος καθώς και οι πιο χαρακτηριστικοί τύποι βραχυκυκλωμάτων που μπορούν να παρουσιαστούν κατά

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25

Pacheco, Nuno Miguel Freitas. "Teste de motor diesel com biocombustíveis." Master's thesis, 2013. http://hdl.handle.net/1822/28227.

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Dissertação de mestrado integrado em Engenharia Mecânica<br>Este trabalho tem por objetivo testar o funcionamento de um motor diesel, quando alimentado com biocombustível (biodiesel e/ou outros), de modo a verificar as suas características em termos de potência, consumos, e de emissões gasosas no funcionamento do motor, e do veículo. Num estudo inicial sobre o estado da arte, após uma breve descrição do processo de produção, são analisadas as principais características dos combustíveis bem como o efeito da sua utilização no motor, designadamente no seu desempenho, nos consumos, a compatib

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