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Dissertations / Theses on the topic 'Diesel internal combustion engines'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Morgan, Tessa Joanne. "The modelling of internal combustion engine thermal systems and behaviour." Thesis, University of Nottingham, 2003. http://eprints.nottingham.ac.uk/12225/.

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The work described in this thesis concerns the continued development and application of a computational model to simulate the thermal behaviour of internal combustion engines. The model provides information on temperature and heat flow distributions within the engine structure, and on temperatures of oil, coolant and engine-out exhaust gas. Sub-models calculate friction levels, fuel flow rates and gas-side heat transfer, including the effects of exhaust gas recirculation (EGR), spark advance and turbocharging. The effects of auxiliary components such as a cabin heater, oil cooler, intercooler,

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2

Petreanu, Sorin. "Conceptual analysis of a four-stroke linear engine." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2084.

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Thesis (Ph. D.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains xii, 126 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 122-126).

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3

Wiseman, Marc William. "Spark ignition engine combustion process analysis." Thesis, University of Nottingham, 1990. http://eprints.nottingham.ac.uk/11131/.

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Cylinder pressure analysis is widely used in the experimental investigation of combustion processes within gasoline engines. A pressure record can be processed to reveal detail of charge burning, which is a good indicator of combustion quality. The thesis describes the evaluation of an approximate technique for calculating the mass fraction of the charge that has burnt; a novel approach for determining heat loss to the block; the development of a powerful system for combustion analysis; and the investigation of the correlation between the crank angle location of the 50% mass burnt and minimum

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4

Angel-Smith, Sarah Jane. "Characterisation of diesel injector deposits using advanced analytical techniques." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/50745/.

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Internal diesel injector deposits (IDIDs) have become a prolific issue in the last decade, increased number of incidences have occurred since the introduction of ultra-low sulfur diesel and biodiesel. The IDIDs have caused concerns for customers such as injector systems misfiring or blocking, increased emissions and fuel consumption. Interest into the origins of the deposits has steadily grown, with identified possible causes including contaminants, degraded additives, or thermal and pressure stresses of the engine. Most examples in previous studies only provide surface analysis of IDIDs, howe

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5

Li, Qile. "Combustion aided by a glow plug in diesel engines under cold idling conditions." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/35875/.

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Glow plugs are widely used to promote the desired cold start and post-cold start combustion characteristics of light duty diesel engines. The importance of the glow plug becomes more apparent when the compression ratio is low. An experimental investigation of combustion initiation and development aided by the glow plug has been carried out on a single cylinder HPCR DI diesel engine with a low compression ratio of 15.5:1. High speed imaging of combustion initiated by the glow plug in a combustion bomb has been used to add understanding of initiation process. Complementary CFD studies have been

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6

Chandran, Davannendran. "Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/35228/.

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Compatibility of fuel delivery materials (FDM) with biodiesel fuel in the fuel delivery system (FDS) under real-life common rail diesel engine (CRDE) operation poses a challenge to researchers and engine manufacturers alike. Although standard methods such as ASTM G31 and ASTM D471 for metals and elastomers, respectively, are deemed suitable for evaluating the effects of water content, total acid number (TAN) and oxidation products in biodiesel on FDM degradation, they do not resemble the actual engine operation conditions such as varying fuel pressure/temperature as well as the presence of a w

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7

Bech, Alexander. "Thermal analysis and fuel economy benefits of cylinder deactivation on a 1.0l spark ignition engine." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/49777/.

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The deactivation of a cylinder on a 1.0litre three cylinder turbocharged gasoline engine has been investigated providing novel information on thermal and fuel consumption effects associated with the technology. This comes in light of providing solutions to reduce fuel consumption and CO2 emissions resulting from internal combustion engines. The investigation has been carried out through the PROgram for Modelling of Engine Thermal Systems (PROMETS). A version of PROMETS was extensively developed to characterise a commercially produced TCE not fitted with cylinder deactivation technology. Develo

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8

Burrows, John Antony. "An investigation into the cold start performance of automotive diesel engines." Thesis, University of Nottingham, 1998. http://eprints.nottingham.ac.uk/13249/.

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The cold start performance of automotive diesel engines is currently poor when compared to similar gasoline units. This thesis describes an experimental and theoretical investigation into the factors limiting diesel cold start behaviour. Studies have been carried out on IDI and DI designs of engine. Start behaviour has been characterised in terms of times taken to complete various stages of startup, engine speed variations and processes which affect these. Combustion and friction behaviour have been investigated in detail. Engine friction losses are dependent on temperature. During start-up th

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9

Di, Liberto Gianluca. "Mechanisms of soot transfer to oil of an HPCR diesel engine." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/42331/.

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High levels of soot-in-oil can cause an increase in engine wear and oil viscosity, thus reducing oil drain intervals. The mechanisms by which soot particles are entrained into the bulk oil are not well understood. The research reported in this thesis addresses questions on the mechanisms of soot transfer to the lubricating oil in light-duty diesel engines with high pressure EGR systems. Deposition as a result of blow-by gas passing the piston ring pack and by absorption to the oil film on the cylinder liner via thermophoresis are soot transfer mechanisms that have been considered in detail. Th

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10

Keeler, Benjamin. "Constraints on the operation of a DI diesel engine in partially-premixed combustion mode." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10760/.

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Partially-premixed Charge Compression Ignition (PCCI) combustion is defined by increased levels of premixed charge whilst retaining control over combustion through injection timing. An experimental investigation has been carried out on a current generation DI diesel engine, equipped with High Pressure Common Rail (HPCR) fuel injection equipment and an external Exhaust Gas Recirculation (EGR) system. The aims of the investigation were to determine the constraints imposed on operating a PCCI combustion strategy with the aim of simultaneously reducing engine-out net soot and NOx emissions. The wo

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11

MacMillan, David James. "Influences on the cold start behaviour of a diesel engine at reduced compression ratio." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10759/.

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The design trend for light duty diesel engines is towards lower compression ratio and higher turbocharger boost. This can enable higher specific power and lower pollutant emissions to be achieved, but raises concerns that cold start operation might be adversely affected. This is investigated and quantified through the study of a modern light duty diesel engine at two compression ratios and temperatures down to -20ºC. Key indicators of cold start performance are the magnitude and cycle-to-cycle variation of indicated mean effective pressure. Initial studies were carried out at 300 rpm, a speed

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12

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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13

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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14

Wan, Mahmood Wan Mohd Faizal. "Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12064/.

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The investigation reported in this thesis is concerned with the topic of soot formation and soot particle motion in the cylinder of a light duty automotive diesel engine. CFD has been employed to simulate in-cylinder conditions and to investigate the source of particles which are transferred to the oil. The accumulation of soot in the lubricating oil of diesel engines is one of the factors limiting the interval between oil changes and hence service interval. Soot particles can be transferred to oil film on the cylinder wall layers through the complex motion of the fluid flow in the cylinder. T

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15

Sime, Anthony P. "Stress analysis of overlapped crankshafts." Thesis, University of Nottingham, 1998. http://eprints.nottingham.ac.uk/11566/.

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The crankshaft is a complex component, and as such, the influence of its geometric parameters on stresses seen under service loads is not well understood. The objectives of this work are to investigate the effects of a wide range of geometric parameters on stresses in overlapped crankshafts, to find correlation between results and to formulate simple methods of predicting peak stress levels: It is intended to achieve this by use of the Finite Element (FE) and Boundary Element (BE) methods. Individual crankthrows are loaded under the important load cases of bending and torsion. Stress concentra

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16

Ammari, H. D. "The heat transfer coefficient on film cooled surfaces." Thesis, University of Nottingham, 1989. http://eprints.nottingham.ac.uk/12730/.

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A systematic investigation of the effects of coolant-to-mainstream density ratio and mainstream acceleration on the heat transfer following injection through a row of holes in a flat plate into a turbulent boundary layer is described. A mass transfer technique was employed which uses a swollen polymer surface and laser holographic interferometry. The constant concentration of the test surface simulated isothermal conditions. Density ratios in excess of unity, representative of gas turbine operating conditions, were obtained using foreign gas injection into mainstream air. The experimental tech

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17

Addison, James Edward. "The benefits of thermal management to reduce friction losses in engines." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/29002/.

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The research reported in the thesis addresses questions of how engine fuel consumption and carbon dioxide emissions are can be reduced through improvements in thermal management, lubricant design, and energy recovery. The investigations are based on simulation studies using computational models and sub-models developed or revised during the work, and results provided by complementary experimental studies carried out by collaborating investigators. The brake thermal efficiency of the internal combustion engines (ICE) used in cars and light duty commercial vehicles is reduced by frictional losse

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18

Sogbesan, Oluwasujibomi. "Strategies for reducing hydrocarbon emissions in diesel low temperature combustion." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/21569.

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Government legislation on particulate matter (PM) and oxides of nitrogen (NOX) emissions have become increasingly stringent over the past decades. Future projections have led to internal combustion (IC)engine developers exploring advanced combustion technologies which may replace or supplement current state of the art systems. Advanced combustion technologies such as Low Temperature Combustion (LTC) cover a broad series of mechanisms that seek to attain in-cylinder Equivalence ratio (f) - Temperature (T) combinations during combustion which lead to acceptable emissions of exhaust PM and NOX. T

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19

Mohammd, W. A. "A two-step Lax-Wendroff finite difference scheme applied to internal combustion engine gas flow calculations." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336416.

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20

Telli, Giovani Dambros. "Análise do desempenho de um motor a combustão de ignição por compressão monocilíndrico no funcionamento bicombustível diesel-etanol." reponame:Repositório Institucional da UCS, 2018. https://repositorio.ucs.br/handle/11338/3657.

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O objetivo do trabalho foi investigar experimentalmente os efeitos de um motor de ignição por compressão operando no modo bicombustível, diesel-etanol. Os experimentos foram conduzidos com um motor mono cilíndrico acoplado a um dinamômetro à plena carga, variando sua rotação de 1800 a 3000 rpm a cada 200 rpm. Etanol hidratado foi injetado na admissão de ar do motor, representando taxas de substituições de 11,5 a 52,3% em energia. Os experimentos resultaram em uma redução máxima de 69% no índice de fumaça, reduções nas emissões de CO, CO2, e nas temperaturas dos gases de escape. Um aumento máxi

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21

Milovanović, Nebojša. "A study of controlled auto ignition (CAI) combustion in internal combustion engines." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/19906.

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Controlled Auto Ignition (CAI) combustion is a new combustion principle in internal combustion engines which has in recent years attracted increased attention. In CAI combustion, which combines features of spark ignition (SI) and compression ignition (CI) principles, air/fuel mixture is premixed, as in SI combustion and auto-ignited by piston compression as in CI combustion. Ignition is provided in multiple points, and thus the charge gives a simultaneous energy release. This results in uniform and simultaneous auto-ignition and chemical reaction throughout the whole charge without flame propa

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22

Brunelli, Rafael Rogério. "Estudo de viabilidade operacional e desempenho de motores de combustão interna operando com combustível biodiesel em relação ao combustível diesel automotivo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17562.

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O trabalho apresenta uma análise técnica de desempenho dos motores de combustão interna ciclo Diesel, operando com combustível biodiesel em relação à operação com óleo diesel automotivo do tipo B. Busca-se neste trabalho definir uma relação tecnológica entre o antigo (óleo diesel) e o novo (biodiesel), demonstrando-se formas e processos de operação com ambos, a fim de enfatizar a garantia de eficiência da aplicação do biodiesel nos motores que hoje operam com óleo diesel automotivo. O desempenho foi avaliado em relação ao torque, potência, consumo específico de combustível e emissões de fumaça

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23

Asay, Rich. "A Five-Zone Model for Direct Injection Diesel Combustion." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/100.

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Recent imaging studies have provided a new conceptual model of the internal structure of direct injection diesel fuel jets as well as empirical correlations predicting jet development and structure. This information was used to create a diesel cycle simulation model using C language including compression, fuel injection and combustion, and expansion processes. Empirical relationships were used to create a new mixing-limited zero-dimensional model of the diesel combustion process. During fuel injection five zones were created to model the reacting fuel jet: 1) liquid phase fuel 2) vapor phas

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24

Lancefield, T. M. "The application and effects of variable duration camshaft systems to light duty diesel engines." Thesis, University of Oxford, 2002. http://ora.ox.ac.uk/objects/uuid:b5efcd84-418e-451a-aa54-0b256881b22e.

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The work described in this thesis was carried out to investigate the application of variable valve actuation (VVA) to light-duty diesel engines for use in passenger vehicles. The background to this was that there was little published on the subject and with advanced turbochargers, exhaust gas re-circulation systems and high pressure fuel injection systems reaching maturity it seemed likely that further enhancement of the air management in this type of engine, through VVA would receive greater interest. The first section of this thesis discusses the external pressures on engine manufacturers, f

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25

Monelletta, Luca. "Contribution to the study of combustion noise of automotive Diesel engines." Doctoral thesis, Universitat Politècnica de València, 2011. http://hdl.handle.net/10251/10954.

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Despite their important advantages in terms of fuel consumption in comparison with gasoline engines, for a long time the characteristic impulsive combustion noise has been one of the main causes why customers are reluctant to buy cars equipped with Diesel engines. This is the main reason for the efforts devoted by car manufacturers to mitigate Diesel engine noise while improving performance and driveability. In spite of all technical improvements, vehicles equipped with High Speed Direct Injection (HSDI) engines still offer a comfort level inferior to gasoline engine vehicles. Noise represe

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26

Lehmann, Flavio Gustavo. "Análise da combustão e emissões em motores a bio-diesel." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-07072016-145809/.

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A rápida evolução do mercado automotivo, em função de maiores restrições sobre as emissões, impulsionou a utilização de várias alternativas para melhorias dos motores diesel, entre elas as mudanças nos seus componentes com o auxílio de ferramentas de modelagem e a utilização de combustíveis alternativos. As características dos combustíveis afetarão a queima e, assim, alteram os resíduos do processo de combustão. Novos combustíveis podem também ser utilizados como uma alternativa para veículos de gerações anteriores com o intuito de reduzir as emissões. Este estudo mostra os efeitos da utilizaç

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27

Ceccarelli, Riccardo. "Model-based fault detection in diesel engines air-path." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00870762.

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Cette thèse a pour but l'étude de la détection basée sur modèle de défauts pour lesmoteurs Diesel produits en grande série. La nécessité d'une surveillance continue del'état de santé des véhicules est maintenant renforcée par la législation Euro VI sur lesémissions polluantes, qui sera probablement rendue encore plus contraignante dans sesprochaines révisions. Dans ce contexte, le développement de stratégies robustes, faciles àcalibrer et valides pour des systèmes dispersés (car produits en grande série) procureraitun avantage considérable aux constructeurs automobile. L'étude développée ici t

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28

Aivaz, Balian Razmik. "The effect of compression ratio on the performance of a direct injection diesel engine." Thesis, Brunel University, 1990. http://bura.brunel.ac.uk/handle/2438/11249.

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This thesis considers the effect of compression ratio on the performance of a direct injection diesel engine. One aspect of engine performance is considered in great detail, namely the combustion performance at increased clearance volume. This aspect was of particular interest because variable compression ratio (VCR) systems normally operate by varying the clearance volume. The investigation relied upon results obtained both from experimental and computer simulating models. The experimental tests were carried out using a single-cylinder direct-injection diesel engine, under simulated turbochar

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29

Aksu, Cagdas. "Performance Analysis Of A Compression Ignition Internal Combustion Engine Using Superheated Ethanol Vapor." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613255/index.pdf.

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The aim of this study is to experimentally measure performance characteristics of a compression ignition (CI) internal combustion engine using superheated ethanol vapor. The engine is a 1.3L inline 4 cylinder direct injection (DI) turbocharged compression ignition (CI) engine. While the engine will be fed with superheated ethanol as homogeneous fuel-air mixture through intake manifold, the amount of diesel fuel that the engine requires to run at idle will also be supplied in order to initiate combustion. Ethanol will be superheated using a new patented double heat exchanger has been manufactur

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30

Thoo, Wei Jet. "A study of the ignition delay characteristics of combustion in a compression ignition engine operating on blended mixtures of diesel and gasoline." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/32843/.

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The interest to study diesel-gasoline fuel mix for CI engine combustion had been motivated by the higher thermal efficiency of CI engine compared to SI engine which gasoline normally runs in and the report of having lower NOx and PM emissions for gasoline combustion in CI engine. The experimental CI engine was unable to run on 100% gasoline but able to run on gasoline blend as high as G80 with default SOI timing setting. 100% gasoline would not run despite it contains only 20% more gasoline than G80 due to its extremely longer ignition delay caused by the exponential increase of gasoline blend

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31

Bilge, Egemen. "Computer Modeling Of Blowback Oil Consumption In Internal Engines." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611129/index.pdf.

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Environmental pollution is an important problem of our world. Governments are aware of this problem and emission regulations are continuously improved. One of the strictest regulations is about unburned and burned hydrocarbon emissions. In internal combustion engines the origin of the burned and unburned hydrocarbons is fuel and engine oil. As a result of the sanctions and the necessity of improved combustion performance of the engine, manufacturers work on manufacturing technology and engine tribology. With the improvement of these areas oil loss from internal combustion engine is reduced. En

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32

Meyer, Jason. "Calibration reduction in internal combustion engine fueling control: modeling, estimation and stability robustness." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306682834.

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Ahmed, Fayez-Shakil. "Modeling, simulation and control of the air-path of an internal combustion engine." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2013. http://tel.archives-ouvertes.fr/tel-01002113.

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Today's globally competitive market and its associated environmental and social issues of sustainable development are major challenges for the automobile industry. To meet them, the industry needs to invest in high performance development tools. For improving engine performance in terms of consumption and emission, the interactions between the subsystems of the engine air-path need to be understood. This thesis followed two major axes of research in this context. First, the problems related to the modeling of the global air-path system were studied, which include the airflow characteristics be

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Rocha, Danilo Sousa. "AnÃlise NumÃrica do Desempenho de um Motor Diesel Turboalimentado Operando com Mistura Ãleo Diesel-Biodiesel de Mamona." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6640.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Os efeitos da adiÃÃo do biodiesel proveniente do Ãleo de mamona ao Ãleo diesel convencional foram estudados empregando-se ensaios dinamomÃtricos e simulaÃÃes multidimensionais. Avaliou-se o impacto desta adiÃÃo na dinÃmica do jato de combustÃvel e na formaÃÃo de Ãxidos de nitrogÃnio. Empregou-se o cÃdigo multidimensional KIVA 3 VR2 para a realizaÃÃo das simulaÃÃes computacionais e curvas experimentais de pressÃo no cilindro de um motor diesel rÃpido turboalimentado na validaÃÃo destas simulaÃÃes. Os combustÃveis analisados foram

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SILVA, Débora Verônica Soares da. "Análise das emissões atmosféricas e eficiência energética na geração de eletricidade por termogeração, utilizando motores do ciclo diesel." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/515.

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Submitted by Kilvya Braga (kilvyabraga@hotmail.com) on 2018-04-27T12:26:50Z No. of bitstreams: 1 DÉBORA VERÔNICA SOARES DA SILVA - DISSERTAÇÃO (PPGEM) 2016.pdf: 2745165 bytes, checksum: dc06b85aa4e599aca0f2669880e12954 (MD5)<br>Made available in DSpace on 2018-04-27T12:26:50Z (GMT). No. of bitstreams: 1 DÉBORA VERÔNICA SOARES DA SILVA - DISSERTAÇÃO (PPGEM) 2016.pdf: 2745165 bytes, checksum: dc06b85aa4e599aca0f2669880e12954 (MD5) Previous issue date: 2016-02-29<br>CNPq<br>A crise energética em 2001 evidenciou a necessidade de expansão dos investimentos no Setor Elétrico Brasileiro. Em fun

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Tagliante-Saracino, Fabien. "Combined study by Direct Numerical Simulation and optical diagnostics of the flame stabilization in a diesel spray." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC017/document.

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La compréhension du processus de stabilisation des flammes Diesel constitue un défi majeur en raison de son effet sur les émissions de polluants. En effet, la relation étroite entre la distance de lift-off (distance entre la flamme et l’injecteur) et la production de suie est maintenant bien établie. Cependant, différents mécanismes de stabilisation ont été proposés mais sont toujours sujets à discussion. L'objectif de cette thèse est de fournir une contribution expérimentale et numérique pour identifier les mécanismes de stabilisation majeurs.La combustion d'un spray n-dodécane issu d'un inje

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Miguel, García Julián. "Analysis of the high pressure EGR dispersion among cylinders in automotive diesel engines." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/161889.

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[ES] Los objetivos son 2: 1- Determinar el efecto de la dispersión de la recirculación de gases de escape de alta presión (HP EGR) en las emisiones de NOx y humos en motores diésel de automoción en operaciones de funcionamiento constantes. La investigación cuantifica las emisiones de NOx y humos en función del nivel de dispersión de EGR de alta presión entre cilindros. 2- Explorar los límites del modelado 1D para predecir el movimiento del flujo de los gases en la compleja situación en la que estos entran en los cilindros desde el colector de admisión. Los experimentos se realizaron en un banc

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Jessup, Eric Ashton. "BYU Diesel Engine Lab Setup and Parasitic Losses of the Water Pump and Vacuum Pump on a Cummins 2.8L Engine." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8446.

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The need to minimize carbon dioxide (CO2) emissions is becoming increasingly important with the total number of vehicles throughout the world exceeding one billion. Carbon dioxide emissions can be reduced by improving vehicle fuel efficiency. While electric transportation is gaining popularity, most passenger vehicles are still powered by gasoline or diesel engines. The main objective of this work was to provide opportunities for studying and improving the fuel efficiency of internal combustion engines (ICE). This was achieved by 1) Designing, building and testing auxiliary systems necessary t

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Peraza, Ávila Jesús Enrique. "Experimental study of the diesel spray behavior during the jet-wall interaction at high pressure and high temperature conditions." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/149389.

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[EN] The potential of diesel engines in terms of robustness, efficiency and energy density has made them widely used as power generators and propulsion systems. Specifically, fuel atomization, vaporization and air-fuel mixing, have a fundamental effect on the combustion process, and consequently, a direct impact on pollutant formation, fuel consumption and noise emission. Since the combustion chamber has a limited space respect to the spray penetration, wall impingement is considered to be a common event in direct injection diesel engines, having a relevant influence in the spray evolution and

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Chien, Jui-Yu. "The future and outlook of alternative fuel bus industry and its marketing strategy." CSUSB ScholarWorks, 2002. https://scholarworks.lib.csusb.edu/etd-project/2332.

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According to the current governmental regulations, all diesel buses will be replaced in the United States and the European market within the next ten years. There are over 60,000 buses in the United States and each year over 3,000 new buses of approximately 40 feet in length are purchased. The bus market has a growth rate of four to five percent per year over the last two years. The improvements in technology offered by United States companies prove unsatisfactory in terms of bus performance and the emissions of new buses. The energy crisis in the United States and concern over the health haza

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Yamawaki, Marcio. "Evolução tecnológica dos materiais e geometria de pistões para motores de combustão interna e um estudo de caso de pistão para aplicação em motor diesel com trinca no cubo." Universidade Presbiteriana Mackenzie, 2013. http://tede.mackenzie.br/jspui/handle/tede/1336.

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Made available in DSpace on 2016-03-15T19:36:40Z (GMT). No. of bitstreams: 1 Marcio Yamawaki.pdf: 22123868 bytes, checksum: 06693820e229aaa1d1f946ee47f58c63 (MD5) Previous issue date: 2013-10-17<br>Pistons are one of the most challenged components on an internal combustion engine. The range of thermal and mechanical loads on these components reach limit levels where the applied materials cannot react and are not able to go back to its original condition. We can say that pistons are the fuses of an internal combustion engine. The adequate selection of materials for the pistons must take in ac

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Nabti, Brahim. "Contribution à l'étude du comportement d'un moteur diesel à préchambre alimentée à l'huile de colza." Valenciennes, 1987. https://ged.uphf.fr/nuxeo/site/esupversions/95663265-c958-4285-8c93-1f4e25558999.

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Etude de la combustion dans un moteur diesel à préchambre utilisant de l'huile de colza. Calcul de la quantité de chaleur dégagée. Comparaison des délais d'inflammation. Modélisation et optimisation du cycle moteur.

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Feitosa, Marcelo Valente. "Desenvolvimento do motor de ignição por compressão alimentado por injeção direta de óleo diesel e por etanol pós-vaporizado no coletor de admissão." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-15032016-135844/.

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Desenvolveu-se um sistema de alimentação misto para motores de ignição por compressão turboalimentados, o qual utiliza diesel injetado normalmente na câmara de combustão e etanol pós-vaporizado, injetado líquido no coletor de admissão e vaporizado pela grande disponibilidade de energia contida no ar comprimido. Foram possíveis substituições de até 55% da massa de diesel por etanol; funcionamento regular e repetitivo foi verificado, resultado da admissão de álcool na forma de vapor. Constatou-se que o rendimento térmico e as emissões de gases poluentes eram bastante influenciados pelo sistema d

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Sehili, Youcef. "Contribution à la modélisation pour l'optimisation des performances et des émissions polluantes d'un moteur diesel fonctionnant en mode dual fuel." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0419.

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Les moteurs à combustion interne jouent un rôle crucial dans notre société moderne, alimentant une variété d'applications allant des transports aux générateurs d'énergie. Face aux défis croissants en matière d'efficacité, d'émissions et de durabilité, une compréhension approfondie et une modélisation précise de la combustion sont essentielles. Cette thèse se consacre à la modélisation de la combustion dans les moteurs à combustion interne en se concentrant sur le mode dual fuel. L'objectif est de contribuer de manière significative à la compréhension, à la modélisation et à l'optimisation de l

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Estepa, Ruiz Daniel. "Study of different fuel injection and air management strategies as a tool for emissions control in a compression ignition engine (Diesel engine)." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/113076.

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En la actualidad, la industria del transporte es la encargada de satisfacer las necesidades logísticas del mundo. Los combustibles fósiles continúan siendo la principal fuente de energía de esta industria, y el motor Diésel, una de las tecnologías principales en la transformación de la energía química de estos combustibles en energía mecánica a través del proceso de combustión. Asociado a este proceso de transformación de la energía, un conjunto de efectos indeseados como las emisiones contaminantes o los gases de efecto invernadero han hecho movilizar a la comunidad científica. Dicha comunida

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Gaudart, Louis. "Incidences des configurations de fonctionnement de navires militaires sur la suralimentation a deux etages de leurs moteurs diesel de propulsion pag btc." Nantes, 1987. http://www.theses.fr/1987NANT2061.

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Wang, Yue. "Numerical Studies of Flow and AssociatedLosses in the Exhaust Port of a Diesel Engine." Doctoral thesis, KTH, Mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134844.

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In the last decades, the focus of internal combustion engine development has moved towards more efficient and less pollutant engines. In a Diesel engine, approximately 30-40% of the energy provided by combustion is lost through the exhaust gases. The exhaust gases are hot and therefore rich of energy. Some of this energy can be recovered by recycling the exhaust gases into turbocharger. However, the energy losses in the exhaust port are highly undesired and the mechanisms driving the total pressure losses in the exhaust manifold not fully understood. Moreover, the efficiency of the turbine is

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Auñón, García Ángel. "Development and validation of a virtual engine model for simulating standard testing cycles." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/168906.

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[ES] Las nuevas regulaciones en materia de emisiones de efecto invernadero y calidad del aire han conducido la evolución tecnológica de los motores de combustión interna durante los últimos años. Las mejoras en el proceso de la combustión, la sobrealimentación, la gestión térmica, los sistemas de post tratamiento y técnicas como la recirculación de gases de escape, han permitido que los motores de combustión interna de hoy en día sean cada vez más limpios. La adopción en Europa del nuevo ciclo de homologación WLTP, que considera un ciclo de conducción más realista que su predecesor el NEDC, as

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Bishop, Robert Phelps. "Combustion efficiency in internal combustion engines." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15164.

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Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING<br>Bibliography: leaf 26.<br>by Robert Phelps Bishop.<br>B.S.

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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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