Tesis sobre el tema "Diesel fuel injector"
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Bergstrand, David. "Investigation of Internal Diesel Injector Deposits on fuel injector performance for proposal of injector test rig test method". Thesis, Uppsala universitet, Elektricitetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417012.
Texto completoReid, Benjamin A. "An optical investigation of cavitation phenomena in true-scale high-pressure diesel fuel injector nozzles". Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6358.
Texto completoCarreres, Talens Marcos. "Thermal effects influence on the Diesel injector performance through a combined 1D modelling and experimental approach". Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/73066.
Texto completo[ES] El sistema de inyección es uno de los elementos que más interés ha despertado en la investigación en el campo de los motores diésel de inyección directa, debido a su papel clave en la atomización y vaporización del combustible así como en el proceso de mezcla, que afectan directamente al consumo y la generación de ruido y emisiones contaminantes. Las crecientes presiones de inyección en motores modernos han propiciado la necesidad de estudiar fenómenos como la cavitación, flujo compresible o el efecto de los cambios de las propiedades del combustible a lo largo del proceso, cuya importancia relativa era menor en etapas tempranas del desarrollo de los motores alternativos. Las pequeñas dimensiones de los conductos del inyector, las altas velocidades a través de los mismos y la naturaleza transitoria del proceso dificultan la observación directa en estas cuestiones. Por ello, las herramientas computacionales han proporcionado una ayuda inestimable en el campo. El objetivo de la presente tesis es analizar la influencia de los efectos térmicos en el funcionamiento de un inyector diésel. Para tal fin, se debe estimar la variación de la temperatura del combustible a lo largo de las restricciones internas del inyector. La influencia de estos cambios en las propiedades termofísicas del combustible más relevantes en el sistema de inyección también debe ser evaluada, debido a su impacto en la dinámica del inyector y en la forma de la tasa de inyección. Para dar respuesta a estos objetivos, se han utilizado técnicas experimentales y computacionales. Se ha llevado a cabo una caracterización dimensional e hidráulica de un inyector Bosch CRI 2.20 actuado mediante solenoide, incluyendo medidas de tasa de inyección en un amplio rango de condiciones de operación, para lo que se ha prestado especial atención al control de la temperatura del combustible. Se ha implementado un modelo 1D del inyector para confirmar y extender las observaciones extra\'idas de los experimentos. El modelo considera variaciones locales de presión y temperatura del combustible gracias a la hipótesis de flujo adiabático, para lo cual también se ha tenido que llevar a cabo una caracterización experimental de las propiedades del combustible a alta presión. Los límites de la validez de esta hipótesis se han analizado cuidadosamente en el estudio. Los resultados muestran una influencia significativa de la temperatura del combustible a la entrada del inyector en la tasa y duración de inyección, atribuida al efecto de la variación de las propiedades del combustible y al hecho de que el inyector permanece en operación balística para la mayoría de sus condiciones de funcionamiento. Los cambios en temperatura del combustible a lo largo de los orificios de control del inyector son capaces de modificar su dinámica considerablemente. Además, si el combustible a la entrada del inyector se encuentra a temperatura ambiente o por encima, se ha observado que la temperatura a la salida de la tobera no varía de manera importante una vez se alcanzan condiciones estacionarias. No obstante, un calentamiento significativo puede tener lugar para temperaturas de entrada típicas de las condiciones de arranque en frío.
[CAT] El sistema d'injecció és un dels elements que més interés ha despertat en la investigació en el camp dels motors dièsel d'injecció directa, degut al seu paper clau en l'atomització i vaporització del combustible, així com en el procés de mescla, que afecten directament el consum i la generació de soroll i emissions contaminants. Les creixents pressions d'injecció en motors moderns han propiciat la necessitat d'estudiar fenòmens com la cavitació, flux compressible o l'efecte dels canvis de les propietats del combustible al llarg del procés, la importància relativa dels quals era menor en les primeres etapes del desenvolupament dels motors alternatius. Les menudes dimensions dels conductes de l'injector, les altes velocitats a través dels mateixos i la natura transitòria del procés dificulten l'observació directa en estes qüestions. Per això, les ferramentes computacionals han proporcionat una ajuda inestimable en el camp. L'objectiu de la present tesi és analitzar la influència dels efectes tèrmics en el funcionament d'un injector dièsel. Per a tal fi, es deu estimar la variació de la temperatura del combustible al llarg de les restriccions internes de l'injector. La influència d'estos canvis en les propietats termofísiques del combustible més relevants en el sistema d'injecció també ha de ser avaluada, degut al seu impacte en la dinàmica de l'injector i en la forma de la tasa d'injecció. Per tal de donar resposta a estos objectius, s'han utilitzat tècniques experimentals i computacionals. S'ha dut a terme una caracterització dimensional i hidràulica d'un injector Bosch CRI 2.20 actuat mitjançant solenoide, incloent mesures de tasa d'injecció en un ampli rang de condicions d'operació, per al que s'ha prestat especial atenció al control de la temperatura del combustible. S'ha implementat un model 1D de l'injector per tal de confirmar i estendre les observacions extretes dels experiments. El model considera variacions locals de pressió i temperatura del combustible gràcies a la hipòtesi de flux adiabàtic, per la qual cosa també s'ha hagut de dur a terme una caracterització experimental de les propietats del combustible a alta pressió. Els límits de la validesa d'esta hipòtesi s'han analitzat acuradament en l'estudi. Els resultats mostren una influència significativa de la temperatura del combustible a l'entrada de l'injector en la tasa i duració d'injecció, atribuïda a l'efecte de la variació de les propietats del combustible i al fet que l'injector roman en operació balística per a la majoria de les seues condicions de funcionament. Els canvis en temperatura del combustible al llarg dels orificis de control de l'injector són capaços de modificar la seua dinàmica considerablement. A més, si el combustible a l'entrada de l'injector es troba a temperatura ambient o per damunt, s'ha observat que la temperatura a l'eixida de la tobera no varia de manera important una vegada s'han assolit condicions estacionàries. No obstant això, un escalfament significatiu pot tenir lloc per a temperatures d'entrada típiques de les condicions d'arrancada en fred.
Carreres Talens, M. (2016). Thermal effects influence on the Diesel injector performance through a combined 1D modelling and experimental approach [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/73066
TESIS
PAOLICELLI, FEDERICA. "Hydraulic circuit layout analysis, diagnostics and control of the injection process in Common Rail diesel fuel injection systems". Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2690958.
Texto completoKönigsson, Fredrik. "Advancing the Limits of Dual Fuel Combustion". Licentiate thesis, KTH, Förbränningsmotorteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96945.
Texto completoQC 20120626
Diesel Dual Fuel
Sjöberg, Magnus. "The rotating injector as a tool for exploring DI diesel combustion and emissions formation processes". Doctoral thesis, KTH, Machine Design, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3208.
Texto completoA diesel fuel injector has been modified to allow rotationaround its axis, driven by an electric motor. Injections at upto 6000 rpm from the rotating injector have been investigatedunder the influence of air swirl on one optical research engineand one optically accessible heavy-duty diesel engine.
The experiments show that changing from a normal, staticinjection to a sweeping injection has profound effects on sprayformation, dispersion and penetration. This influences thefuel/air-mixing, autoignition, combustion rate and emissionsformation. The spray propagation is stronger influenced byinjector rotation than by air swirl.
The air entrainment into the spray increases forcounter-swirl rotation of the injector and this speeds up thevaporization and decreases the formation of soot. In addition,the oxidation of soot is enhanced since the counter-swirlinjection forces the intense fuel-rich and soot containingspray core to penetrate into fresh air instead of replenishingthe rich regions in the head of the spray. Fuel accumulationalong the piston bowl wall decreases as an effect of thereduced penetration with counter-swirl injection. Altogether,this decreases the smoke emissions for low and intermediateengine loads.
For the combustion system studied, counter-swirl rotation ofthe injector cannot decrease the smoke emissions at high engineload since the reduced spray penetration impairs the airutilization. Fast and efficient combustion at high loadrequires spray induced flame spread out into the squish region.Spray induced flow of cool fresh air from the bottom of thepiston bowl in towards the injector is also important for lowsoot formation rates.
Co-swirl rotation of the injector reduces the airentrainment into the spray and increases the soot formation.The increased smoke and CO emissions with co-swirl injectionare also attributed to the excessively large fuel-rich regionsbuilt up against the piston bowl wall.
Increased air swirl generally reduces smoke and COemissions. This is mainly an effect of enhanced burnout due tomore intense mixing after the end of fuel injection.
Changes in smoke as an effect of injector rotation aregenerally accompanied with opposite, but relatively small,changes in NO. Fast and efficient burnout is important for lowsmoke emissions and this raises both the temperature andproduction of NO. NO production is strongly influenced by thein-cylinder conditions during the latter part of themixing-controlled combustion and in the beginning of theburnout.
Keywords:diesel spray combustion, rotating injector,air swirl, air/fuel-mixing, soot, NO, CO, flame visualization,Chemkin modeling, soot deposition
Gavaises, Manolis. "Modelling of diesel fuel injection processes". Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8681.
Texto completoWåhlin, Fredrik. "Direct-injected HCCI with diesel fuel /". Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-518.
Texto completoBaniasad, Mohammad Saeid. "Analysis of fuel injection rate in diesel injection systems". Thesis, Imperial College London, 1994. http://hdl.handle.net/10044/1/7439.
Texto completoPark, Talus. "Dual fuel conversion of a direct injection diesel engine". Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=460.
Texto completoTitle from document title page. Document formatted into pages; contains x, 96 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 61-62).
Tran, Xuan-Thien Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "Modelling and simulation of electronically controlled diesel injectors". Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2003. http://handle.unsw.edu.au/1959.4/19278.
Texto completoFairbrother, R. J. "Computer simulation of fuel injection for direct-injection diesel engines". Thesis, Imperial College London, 1994. http://hdl.handle.net/10044/1/8618.
Texto completoMartynov, Sergey. "Numerical simulation of the cavitation process in diesel fuel injectors". Thesis, University of Brighton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418575.
Texto completoYoung, Jacob. "Hydrogen injection into diesel engines for fuel efficiency improvement". Thesis, Young, Jacob (2008) Hydrogen injection into diesel engines for fuel efficiency improvement. Masters by Coursework thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/2079/.
Texto completoAsay, Rich. "A Five-Zone Model for Direct Injection Diesel Combustion". BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/100.
Texto completoChan, Siew Hwa. "Transient performance of turbocharged vehicle diesel engines". Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46707.
Texto completoJeshani, Mahesh. "Optical characterisation of cavitating flows in diesel fuel injection equipment". Thesis, City University London, 2013. http://openaccess.city.ac.uk/3414/.
Texto completoTonini, Simona. "Fuel spray modelling in direct-injection diesel and gasoline engines". Thesis, City University London, 2006. http://openaccess.city.ac.uk/8486/.
Texto completoPearce, Daniel. "Pressure waves and cavitation in diesel fuel injection rate characterisation". Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/55898.
Texto completoLeonard, Henry J. "Control of airflow and fuel injection parameters in diesel engines". Thesis, University of Bath, 1989. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760591.
Texto completoMcLorn, M. J. "Fundamental behaviour of valves used in diesel fuel injection equipment". Thesis, City, University of London, 2013. http://openaccess.city.ac.uk/19748/.
Texto completoSalters, David Gregory. "Studies of the break-up zones of diesel sprays using an improved conductivity probe methodology". Thesis, University of Manchester, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387222.
Texto completoMirza, Muhammad Riaz. "Studies of diesel sprays interacting with cross-flows and solid boundaries". Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315666.
Texto completoDimitriou, Pavlos. "Air-fuel homogeneity effects on direct injection diesel engine performance emission". Thesis, University of Sussex, 2015. http://sro.sussex.ac.uk/id/eprint/54280/.
Texto completoKällkvist, Kurt. "Fuel Pressure Modelling in a Common-Rail Direct Injection System". Thesis, Linköpings universitet, Fordonssystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70264.
Texto completoBränsletrycket är en av de centrala styrvariablerna i ett modernt common-rail insprutningssystem. Det påverkar utsläppen av kväveoxider och partiklar, motorns specifika bränsleförbrukning och bränslepumpens effektförbrukning. Nogrann reglering och tillförlitliga diagnoser av bränslesystemet är därför mycket viktiga funktioner i motorstyrsystemet. Som ett hjälpmedel vid utveckling av dessa algoritmer samt för att öka förståelsen för hur hårdvaruförändringar påverkar systemet är det önskvärt med en simuleringsmodel av bränslesystemet. En Simulink modell av XPI (Xtra high Pressure Injection) systemet som utvecklats av Scania och Cummins har utvecklats. Till skillnad från de redan tillgängliga modellerna av systemet fokuserar denna modell på snabba simuleringsförlopp genom att enbart modellera medeltryck och medelflöden istället för de momentana trycken och flödena i systemet när motorn roterar. Modellen är uppbyggd av moduler som var och en representerar en fysisk komponent i systemet. Modulerna är mestadels uppbyggda kring de fysikaliska egenskaperna hos komponenten de försöker modellera vilket gör modellen av systemet anpassningsbar till olika hårdvarukonfigurationer och samtidigt lätt att förstå.
Ng, Hoon Kiat. "The simulation of combustion in diesel engines using Kiva 3v on a PC platform". Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289318.
Texto completoClark, Lee A. "Experimental studies and systems modelling to investigate the behaviour of direct injection diesel engines". Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289480.
Texto completoBrooks, 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.
Texto completoJagus, Krzysztof. "Large eddy simulation of fuel injection and spray combustion in an engine environment". Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/4064.
Texto completoSvensson, Kenth Ingemar. "Effects of Fuel Molecular Structure and Composition on Soot Formation in Direct-Injection Spray Flames". Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd830.pdf.
Texto completoRydalch, Andrew J. "Ignition delay properties of alternative fuels with Navy-relevant diesel injectors". Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/42715.
Texto completoIn support of the Navy’s Green Fleet Initiative, this thesis researched the ignition characteristics for diesel replacement fuels used with Navy-relevant fuel injectors. A constant-volume combustion chamber was used to simulate Top-Dead-Center conditions of a diesel engine using an ethylene-air preburn with appropriate make-up oxygen. The injection conditions ranged from temperatures of 1,000 K to 1,300 K and densities has high as 14.8 kg/m3. Hydrotreated renewable diesel (HRD) and direct sugar-to-hydrocarbon (DSH) fuels were injected into the combustion chamber using a Sturman research injector, a Yanmar injector, and an Electro Motive Diesel (EMD) injector. The primary means of data collection was optical emission imaging of laser induced fluorescence of the fuel and broadband emission of the combustion event. The ignition delay was determined using high speed imaging at 50 kHz to determine the time delay between start of injection and start of combustion. The results of the study show that the ignition delay characteristics for the F-76/HRD 50/50 blend are compatible with those of conventional F-76 diesel fuel for both the Yanmar and EMD injectors at the conditions tested. The ignition delay characteristics of the F-76/DSH 50/50 blend fuel for the Yanmar injector were also compatible with those of F-76.
Pelteret, Jean-Paul. "A CFD investigation of cavitation and associated deposit formation in modern diesel fuel injectors". Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5487.
Texto completoReducing the pollution of new vehicles has become a priority to vehicle manufacturers, particularly given the fact that emissions requirements that must be achieved by diesel vehicles are becoming more stringent. Modem fuel injectors on common-rail diesel vehicles use very high rail pressures to aid atomisation and increase combustion efficiency. However, associated with the high injections pressures is the issue of nozzle cavitation. Cavitation leads to pockets of diesel vapour forming in the nozzle and it is hypothesised that this causes the formation of deposits in the nozzle. It is also suggested that the collapse of the cavitation vapour space results in extremely high temperatures within the nozzle, resulting in thermal cracking of the fuel and eventually the formation of carbon deposits. A two-dimensional axisymmetric CFD model with dimensions representative of an injector nozzle was constructed using a fully structured grid.
Fletcher, Philip James. "Determination of additives in fuels using automated flow injection analysis with chemiluminescence detection". Thesis, University of Plymouth, 2002. http://hdl.handle.net/10026.1/2068.
Texto completoSoteriou, Cecilia C. E. "Modelling and prediction of the filling characteristics of modern diesel fuel injection equipment". Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292469.
Texto completoTorab, Babak. "The adaptation of solenoid-actuated injectors for use with dimethyl ether fuel in diesel engines". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/MQ43663.pdf.
Texto completoGambrill, 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/.
Texto completoLee, Hang-Kyung. "Modelling rotary diesel fuel injection equipment with rate control to reduce noise and emissions". Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386594.
Texto completoCross, Brenainn A. "An investigation into the effects of diesel fuel properties on the injection characteristics of a common rail injection system". Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/11990.
Texto completoThis study set out to investigate the effects of diesel fuel properties on the behaviour of a common rail fuel injection system, with particular emphasis on the injection rate shape characteristics. The investigation included the design and commissioning of experimental equipment for the measurement of fuel properties at typical common rail pressures, as well as the measurement of instantaneous fuel flow rate by a modified Bosch Indicator method. Data was then collected for two different diesel fuels, operating in two different fuel injector designs. The two fuels were EN590 (a European reference fuel) and GTL (a fuel derived from natural gas). The two injectors were a Bosch solenoid type injector, and a Bosch piezo type injector.
White, Timothy Ross Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "Simultaneous diesel and natural gas injection for dual-fuelling compression-ignition engines". Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2006. http://handle.unsw.edu.au/1959.4/25233.
Texto completoPugh, Gareth Joseph. "The analysis of heat release in the investigation of split-main fuel injection in a diesel engine". Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420356.
Texto completoNerva, Jean-Guillaume. "An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray". Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/29767.
Texto completoNerva, J. (2013). An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/29767
Palancia
Roth, Richard. "Analyse des images de fluorescence du spray de fuel dans un moteur à injection directe". Rouen, 1998. http://www.theses.fr/1998ROUES084.
Texto completoGlaad, Gustaf. "Pressurizing of high-pressure fuel system forsingle cylinder test cell". Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74432.
Texto completoKontentan för denna mastersavhandling är utvecklingsprocessen för ett högtrycksbränslesystemför kompressionsbränslen såsom diesel och diesellika bränslen som kommer att installeras i enencylindertestcell hos AVL MTC Södertälje, Sverige. Testcellen används av AVL för forskningoch testning av nya bränslen åt deras kunder och detta nya bränslesystem kommer att utöka typernaav bränslen som kan testas med utrustningen till att inkludera kompressionsantända bränslen.Denna avhandling fokuserar på utvecklingen av tillförseln och trycksättnigen av bränslet, säkerställnigenav att ingående material är icke-korrosiva i den avsedda miljön och kompatibla med allanödvändiga bränsletyper och slutligen en säkerhetsanalys av systemet med avseende på operatörsochprocessäkerhet. Andra aspekter såsom massflödesmätning och bränslekonditionering presenterasi systeravhandlingen Flödesmätning och konditionering av högtryckantända bränslen för encylindertestcellskriven av C. Aksoy [1].Målet med denna avhandling var att leverera ett färdigtillverkad bränslesystem och om tiden tillät,även validera systemets prestanda och slutligen integrera och installera systemet i testcellen. Utvecklingsprocesseninleddes med att skriva en produktspecifikation som innehöll en sammanställningav kundens krav och önskemål för produkten och relaterade dessa till produktegenskaper med hjälpav en quality function deployment (QFD) matris. Detta dokument användes vidare som en bas förfortsatt utveckling av produkten i konceptgenereringsprocessen och för att väga de olika konceptenmot varandra med hjälp av Pugh’s matriser. De valda koncepten blev sedan analyserade ytterligare,ett flödesschema för de ingående komponenterna framtaget och övriga sekundära komponenteranalyserade och valda.Till slut valdes högtrycksbränslepumpen från Scanias XPI system och en tryckgivare från HP1000-serien från ESI. Inom tidsramen för avhandlingen färdigställdes aldrig projektet till den grad somhade planerats, men blev istället avbrutet innan tillverkningen av systemet han påbörjas på grund avtidsbegränsningar. Vissa sekundära komponentval, dokumentation såsom ritningar och färdigställningav den fysiska layouten av systemet kvarstod vid avhandlingens slut. All information angåendeallt nödvändigt fortsatt arbete för att färdigställa projektet och integrera systemet i encylindertestcellendokumenterades och med mer tid borde bränslesystemet kunna uppfylla sitt syfte att möjliggöratestning och forskning av kompressionsbränslen i testcellen.
Michailidis, Antonis D. "Understanding complex CI-combustion strategies : an experimental investigation". Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10957.
Texto completoKotze, Johan. "A comparative study on the performance of biodiesel in a modern 1.9L turbo diesel engine". Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4293.
Texto completoENGLISH ABSTRACT: This thesis comprises of the testing and evaluation of a modern diesel engine running on both biodiesel and mineral diesel on the upgraded Bio-fuels Testing Facility (BTF) at Stellenbosch University. The project was motivated by the need to install a modern diesel engine onto the existing BTF test rig for biodiesel testing. In this project, the BTF was re-designed to support a new Volkswagen 1.9L TDI engine. The capabilities of the BTF were then expanded further by the implementation of a low-cost pressure indicating system, utilising an optical pressure transducer. During the testing of biodiesel, it was found that the calorific value of the biodiesel was 14% lower than that of the tested mineral diesel. The ignition quality (cetane index) of the biodiesel was also lower than that of the mineral diesel. Even so, the engine only experienced a maximum power loss of 4.2%. During heat-release analysis, it was determined that there was no significant difference in the combustion process of biodiesel and that of mineral diesel. The conclusion could be made that biodiesel is suitable for use in modern TDI engines. Testing validated the operation of the upgraded test cell, and in trials it was determined that the test results are highly repeatable. The pressure indicating set proved to have some limitations. Only simplified heat-release analyses and reasonable indicated power calculations could be performed with the indicating set. Recommendations were made for improvement in future research.
Centre for Renewable and Sustainable Energy Studies
MANELLI, ANDREA. "Engine Technologies for Reduction of Fuel Consumption and Pollutant Emissions in Light-Duty Diesel Engines". Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2971996.
Texto completoBelloto, Humberto Jesuino. "Análise de falhas em tubos sem costura de aço St52 utilizados em motores diesel". [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265045.
Texto completoDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
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Resumo: O tubo de aço carbono com alto teor de manganês St52 (Norma DIN 1.0580) sem costura, com 8 mm de diâmetro externo e 3 mm de diâmetro interno, atualmente utilizado no sistema de combustível de motores eletrônicos a diesel com pressões de trabalho de até 1300 bar, apresentou problemas nos testes de durabilidade. O rompimento do tubo foi consequência das trincas internas originadas no processo de laminação, denominadas descontinuidades. O tubo de fabricação nacional, atualmente utilizado nos motores, foi comparado com um importado e os resultados dos testes encontrados determinaram qual deles teria maior vida à fadiga. São apresentados nesta dissertação o processo de fabricação do tubo com as suas vulnerabilidades, os testes de fadiga comparando as durabilidades dos tubos nacionais e importados, o efeito do processo de autofretagem e os ensaios metalográficos. Os resultados levaram a concluir que o tubo nacional não atende as solicitações de trabalho do motor e a solução imediata é a utilização do tubo importado. A recomendação para trabalhos futuros seria o estudo de melhoria no processo de laminação para diminuição do nível de descontinuidades internas tubos nacionais
Abstract: The carbon steel with high manganese in accordance with Din 1.0580 (St52) seamless 8 x 3 mm diameter has been used into fuel injection system of the electronic diesel king with pressure up to 1300 bar. This tube presented short life on durability tests due to inner cracks created during rolling process. The tube produced in Brazil and used nowadays in was compared with an imported one using a fatigue test. It is shown on this work the manufacturing tube process, the fatigue test applied to the national and imported tubes and the e effects. The results showed that the national tube does not meet the necessary requirements and the immediate solution is to use the imported one. It is recommended further used on the rolling process to reduce the internal roughness of the tubes produced in Brazil
Mestrado
Materiais e Processos de Fabricação
Mestre em Engenharia Mecânica
Sohail, Aamir. "An experimental investigation of dual-injection strategies on diesel-methane dual-fuel low temperature combustion in a Single Cylinder Research Engine". Thesis, Mississippi State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1596101.
Texto completoThe present manuscript discusses the performance and emission benefits due to two diesel injections in diesel-ignited methane dual fuel Low Temperature Combustion (LTC). A Single Cylinder Research Engine (SCRE) adapted for diesel-ignited methane dual fuelling was operated at 1500 rev/min and 5 bar BMEP with 1.5 bar intake manifold pressure. The first injection was fixed at 310 CAD. A 2nd injection sweep timing was performed to determine the best 2nd injection timing (as 375 CAD) at a fixed Percentage Energy Substitution (PES 75%). The motivation to use a second late injection ATDC was to oxidize Unburnt Hydrocarbons (HC) generated from the dual fuel combustion of first injection. Finally, an injection pressure sweep (550-1300 bar) helped achieve simultaneous reduction of HC (56%) and CO (43%) emissions accompanied with increased IFCE (10%) and combustion efficiency (12%) w.r.t. the baseline single injection (at 310 CAD) of dual fuel LTC.
Nouraei, Hirmand. "Design and Development of a Direct-acting Piezoelectric Fuel Injector". Thesis, 2012. http://hdl.handle.net/1807/33480.
Texto completoKnox-Kelecy, Andrea Lyn. "Turbulent flow in a scale model of a diesel fuel injector nozzle hole". 1992. http://catalog.hathitrust.org/api/volumes/oclc/28738408.html.
Texto completoTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 179-181).