Tesis sobre el tema "Bar Fuel Injection System"
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Källkvist, 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.
Lagimoniere, Ernest Eugene Jr. "The Design and Construction of a High Bandwidth Proportional Fuel Injection System for Liquid Fuel Active Combustion Control". Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34693.
Texto completoMaster of Science
Cross, 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.
Boyd, Michael. "Development of a fuel injection system for an opposed piston two stroke HCCI engine". Thesis, KTH, Maskinkonstruktion (Inst.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143615.
Texto completoHCCI förbränningsmotorer kan ge hög verkningsgrad med låga NOx-utsläpp jämfört med SI och CI-motorer på grund av sin magra förbränning, högt kompressionsförhållande och låg förbränningstemperatur. Nackdelen med HCCI är att den är svår att kontrollera. Behovet av ett optimerat bränsleinsprutningssystem är avgörande för utformningen av en HCCI motor för att uppnå önskvärt och kontrollerbart resultat. Syftet med detta examensarbete var att utveckla och optimera bränsleinsprutningssystemet för en 2-takts, motkolvs bensinmotor och därmed fortsätta utvecklingen av motorn för att uppnå en stabil HCCI förbränning. Motorn och de komponenter som utgör bränsletillförseln analyserades med hjälp av experimentella och teoretiska metoder. Den matematiska ideala massan bränsle och den ideala insprutningsvinkeln bestämdes (när både insugs-och avgas portarna var stängda). Insprutningsfördröjning kontra ”electrical on-time” och spänningskänslighet bestämdes. Olika utformningar av deflektorn som används för att avleda bränsleflödet i sidled längs cylindern studerades, prototyper tillverkas och testades. Motorn kördes därefter med nya inställningar och ny deflektor och resultaten analyserades. Det visade sig att ”L-cut ”designen gav de bästa spray egenskaperna i denna situation. En ”L-cut” design med två inre tätningar gav den mest fördelaktiga sprayvinkeln och finfördelningen. En massekvation skapades som länkade den insprutade massan till ”elektrical on-time” i ECUn med hänsyn till den varierande matningsspänningen. Genom att använda massekvationen och samtidigt ta hänsyn till fördröjningen kunde en ideal insprutningsvinkel hittas. Implementering av den nya deflektorn tillsammans med förbättrad insprutningsvinkel gjorde att motorn kunde köras jämnt med den teoretiska massan som krävs för λ = 1 vid 6000rpm, och samtidigt producera effekt om 0,28 kW. Det var en märkbar förbättring jämfört med tidigare motortester som krävde dubbla bränslemängden för stabil förbränning. Sammanfattningsvis erhölls data som gjorde förbättringarna av insprutningsvinkel och bränslekontrollen möjlig. Motorn kördes med mycket mer exakt insprutad bränslemassa och insprutningsvinkel. Deflektorn förbättrade finfördelningen och optimerade sprayvinkeln. De data som insamlas från tester och analyser kan implementeras i motorns ECU kod för automatiserad insprutningstidpunkt och bränsle massa. Detta har tillsammans med den förbättrade sprayprofilen bidragit till den fortsatta utvecklingen av motorn mot en stabil, effektiv HCCI förbränning.
Applegate, Brian Charles. "Development of a liquid injection propane system for spark-ignited engines via fuel temperature control". Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/Applegate_09007dcc803c5c35.pdf.
Texto completoVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 29, 2007) Includes bibliographical references (p. 153-155).
DeCastro, Jonathan Anthony. "Design and Validation of a High-Bandwidth Fuel Injection System for Control of Combustion Instabilities". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31839.
Texto completoDiscussed in this thesis are the important constituents of the fuel injection systemthat affect heat release authority: the method of fuel modulation, uncoupled dynamics of several components, and the compressibility of air trapped in the fuel line. Additionally, a novel technique to model these systems by way of one-dimensional, linear transmission line acoustic models was developed to successfully characterize the principle of operation of the two systems. Through these models, insight was gained on the modes through which modulation authority was dissipated and on methods through which successful amplitude scaling would be possible. At high amplitudes, it was found that the models were able to successfully predict the actual performance reasonably well for the piston device.
A proportional phase shifting controller was used to test the authority on a 40-kW rig with natural longitudinal modes. Results show that, under limited operating conditions, the sound pressure level at the limit cycle frequency was reduced by about 26 dB and the broadband energy was reduced by 23 dB. Attenuation of the fuel pulse at several combustor settings was due to fluctuating vorticity and temporal droplet distribution effects.
Master of Science
Pettersson, Eric. "Modelling of high-pressure fuel system for controller development". Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386130.
Texto completoSchiller, Noah Harrison. "Design and Validation of a Proportional Throttle Valve System for Liquid-Fuel Active Combustion Control". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9843.
Texto completoMaster of Science
Platts, Kieron Charles. "Investigation into the feasibility of a four valve per cylinder lean burn port fuel injected stratified charge combustion system". Thesis, Birmingham City University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367469.
Texto completoRivas, Perea Manuel Eduardo. "Assessment of fuel consumption reduction strategies on a gasoline turbocharged direct injection engine with a cooled EGR system". Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/68497.
Texto completo[ES] El objetivo de este trabajo de investigación es estudiar la influencia de un lazo de baja presión de EGR en las prestaciones de un motor de gasolina de encendido provocado turbosobrealimentado e inyección directa, en condiciones de ensayos estacionarios y transitorios, con un proceso de optimización de la calibración original del motor para minimizar el consumo de combustible del motor. La estrategia de "cooled EGR" fue también evaluada operando en sinergia con otras estrategias usadas para reducir el consumo de combustible del motor, entre ellas: mezcla pobre, múltiples inyecciones, operación a alta temperatura del fluido refrigerante del motor y movimiento de "swirl" inducido en el cilindro. Para cumplir con los objetivos mencionados, se siguió un proceso metódico donde previamente se desarrolló una metodología global para obtener resultados de indudable calidad, basados en el uso de herramientas experimentales que cumplieran con los requerimientos de las condiciones de ensayo, y las apropiadas herramientas teóricas y procedimiento para post-procesar los ensayos realizados. En segundo lugar, se desarrolló una metodología específica para cada etapa del estudio, teniendo en cuenta los procesos de optimización o estudios paramétricos que se pudieran realizar. Como primera etapa, se presenta un estudio básico del impacto del "cooled EGR" en la combustión, prestaciones, renovación de la carga y emisiones contaminantes del motor. Seguidamente, se procedió a la optimización del centrado de la combustión con la finalidad de minimizar el consumo de combustible del motor y poder analizar el potencial del "cooled EGR" como estrategia de reducción de consumo de combustible. El estudio presentado se realizó para baja, media y alta carga del motor con dos diferentes regímenes de giro del motor. Adicionalmente, se llevó a cabo un estudio del motor operando en condiciones transitorias con "cooled EGR". Se realizaron una serie de ensayos usando el ciclo NEDC como base y se probaron diferentes estrategias sencillas de control de la apertura de la válvula de EGR para analizar la influencia del "cooled EGR" en condiciones transitorias. La segunda etapa consiste en el desarrollo de una metodología para optimizar los parámetros del diagrama de distribución (VVT) y el inicio de inyección, para cargas medias del motor, con la finalidad de maximizar el potencial de reducción de consumo de combustible de la estrategia "cooled EGR". Una vez realizada la optimización, se llevó a cabo un estudio usando la configuración óptima encontrada, operando en sinergia con otras tres estrategias usadas para reducir el consumo de combustible del motor. Estas estrategias fueron evaluadas con la finalidad de incrementar el rango de operación de la estrategia "cooled EGR" para lograr reducir aún más el consumo de combustible del motor. Adicionalmente, se llevó a cabo un estudio básico sobre la influencia de operar con mezcla pobre en la combustión, prestaciones, renovación de la carga y emisiones contaminantes del motor, como introducción al último estudio llevado a cabo sobre la posibilidad de usar la estrategia de mezcla pobre en conjunto con la estrategia de "cooled EGR", con la finalidad de analizar el potencial de controlar las emisiones contaminantes y reducir el consumo de combustible del motor al mismo tiempo.
[CAT] L'objectiu d'este treball d'investigació és estudiar la influència d'un llaç de baixa pressió d'EGR en les prestacions d'un motor de gasolina d'encesa provocat turbosobrealimentat i injecció directa, en condicions d'assajos estacionaris i transitoris, amb un procés d'optimització del calibratge original del motor per a minimitzar el consum de combustible del motor. L'estratègia de "cooled EGR" va ser també avaluada operand en sinergia amb altres estratègies usades per a reduir el consum de combustible del motor, entre elles: mescla pobra, múltiples injeccions, operació a alta temperatura del fluid refrigerant del motor i moviment de `"swirl" induït en el cilindre. Per a complir amb els objectius mencionats, es va seguir un procés metòdic on prèviament es va desenrotllar una metodologia global per a obtindre resultats d'indubtable qualitat, basats en l'ús de ferramentes experimentals que compliren amb els requeriments de les condicions d'assaig, i les apropiades ferramentes teòriques i procediment per a post- processar els assajos realitzats. En segon lloc, es va desenrotllar una metodologia específica per a cada etapa de l'estudi, tenint en compte els processos d'optimització o estudis paramètrics que es pogueren realitzar. Com a primera etapa, es presenta un estudi bàsic de l'impacte del "cooled EGR" en la combustió, prestacions, renovació de la càrrega i emissions contaminants del motor. A continuació, es va procedir a l'optimització del centrat de la combustió amb la finalitat de minimitzar el consum de combustible del motor i poder analitzar el potencial del "cooled EGR" com a estratègia de reducció de consum de combustible. L'estudi presentat es va realitzar per a baixa, mitja i alta càrrega del motor amb dos diferents règims de gir del motor. Addicionalment, es va dur a terme un estudi del motor operand en condicions transitòries amb "cooled EGR". Es van realitzar una sèrie d'assajos usant el cicle NEDC com a base i es van provar diferents estratègies senzilles de control de l'obertura de la vàlvula d'EGR per a analitzar la influència del "cooled EGR" en condicions transitòries. La segona etapa consistix en el desenrotllament d'una metodologia per a optimitzar els paràmetres del diagrama de distribució (VVT) i l'inici d'injecció, per a càrregues mitges del motor, amb la finalitat de maximitzar el potencial de reducció de consum de combustible de l'estratègia "cooled EGR". Una vegada realitzada l'optimització, es va dur a terme un estudi usant la configuració òptima trobada, operant en sinergia amb altres tres estratègies usades per a reduir el consum de combustible del motor. Estes estratègies van ser avaluades amb la finalitat d'incrementar el rang d'operació de l'estratègia "cooled EGR" per a aconseguir reduir encara més el consum de combustible del motor. Addicionalment, es va dur a terme un estudi bàsic sobre la influència d'operar amb mescla pobra en la combustió, prestacions, renovació de la càrrega i emissions contaminants del motor, com a introducció a l'últim estudi dut a terme sobre la possibilitat d'usar l'estratègia de mescla pobra en conjunt amb l'estratègia de "cooled EGR", amb la finalitat d'analitzar el potencial de controlar les emissions contaminants i reduir el consum de combustible del motor al mateix temps.
Rivas Perea, ME. (2016). Assessment of fuel consumption reduction strategies on a gasoline turbocharged direct injection engine with a cooled EGR system [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/68497
TESIS
Glaad, 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.
Andrén, Filip y Olav Borgström. "Common Rail - En bränslebesparingsstudie : – En utvärdering av ett nyinstallerat bränsleinsprutningssystem på isbrytaren Ymer". Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-50558.
Texto completoThe following study has been carried out on behalf of Sjöfartsverket. The study examines how the installation of a common rail system on board the icebreaker Ymer affected fuel consumption and emissions of nitrogen oxides. The raw data logged on board Ymer was analyzed and processed. Materials and information from manufacturers, crew and the technical manager at the Swedish Maritime Administration, Albert Hagander have been used during the study. Together with measured data and previously made research study the findings of the study are supported. It is no coincidence that the system of the common rail type is already applied in most industries such as transport, car industry and agriculture. The main purpose of the Common Rail is to reduce fuel consumption and reduce emissions through cleaner and more efficient combustion of the fuel. We primarily examined how the newly installed system affected fuel consumption and the fuel savings will vary with the load of the machine. Furthermore, we examined how emissions of nitrogen oxides were affected after installation. The problem of increased NOx production due to a higher combustion temperature as the common rail system entails are discussed in the report. The result that was concluded was that fuel savings can be made on board Ymer by replacing the old fuel system with a common rail fuel type. Furthermore, the installation has brought other improvements such as ship machine's reaction to the many load changes that occur during icebreaking.
Janoušek, Michal. "Zvýšení pružnosti zážehového přeplňovaného motoru na CNG". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230278.
Texto completoLawrence, Jacob David. "Design and development of a high pressure ED95 fuel delivery system for a single cylinder test cell engine". Thesis, KTH, Fordonsdynamik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286351.
Texto completoFörnyelsebara biobränslen är det primära alternativet till fossila bränslen för användning i interna förbränningsmotorer och är under ständig utveckling. För den fortsatta utvecklingen av etanoldiesel (ED95) genom provning av nya formuleringar vid AVL Motortestcenter AB krävs ett lämplig testupplägg. Förbränningskvalitetsutvärderingen kräver en avancerad testcell där bränslets förbränningsegenskaper kan utvärderas. Målet med detta arbete var att utveckla ett högtrycksbränslesystem lämpligt för en singelcylindrig forskningsmotor som arbetar enligt kompressionständningsprincipen (dieselprincipen). Litteraturstudien samlade kunskap om bränsleutveckling samt kunskap om dieselmotorers högtrycksbränslesystemen, dess uppbyggnad och utmaningar. Kunskap om fenomen som tryckoscillationer och kavitation i bränslesystem samt förståelse för motorprovcellers uppbyggnad införskaffades. Scanias XPI bränslesystem, som forskningsmotorns högtrycks- bränslesystem ska efterlikna, studerades och adaptioner för att passa till encylinderkörningar i provcell utvärderades. Baserat på informationen ges rekommendationer på hur Scanias XPI system kan implementeras och justeras för att fungera i AVL’s singelcylinderprovcell.
Strouhal, Pavel. "Aplikace vysokotlakého palivového systému na vznětový motor". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254441.
Texto completoMilhor, Carlos Eduardo. "Sistema de desenvolvimento para controle eletrônico dos motores de combustão interna ciclo Otto". Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-12032003-092253/.
Texto completoThe automotive engine management system has become an advanced control system. Its objective is to maintain the pollutants gas emissions according to legislations and to maintain the performance and driveability, at the same time. It presents the main features of a tipical internal combustion engine management system, it describes the control modes and it point out the future tendencies. It describes the control system developed, which one will be usefull as a tool for research involving control applied in this context and engine automotive efficiency optimization researchs
Veiga, Michel Robert. "Desenvolvimento de um gerenciador eletrônico para motores tricombustível". Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-06122010-150018/.
Texto completoThis project intended to minimize one of the main disadvantages of using natural gas vehicles, which was the loss of power, and increase their volumetric efficiency by building an electronic circuit able to efficiently manage the gas injection. The increase in volumetric efficiency is obtained through the efficient management of air-fuel mixture using a closed loop system. The management of the power and economy ratio is achieved with the simultaneous use of natural gas and liquid fuel. In the current conversion systems and original vehicles that use natural gas, the power loss is compensated by turning off the gas system and using only the liquid fuel. This selection is done manually in most conversion systems, and automatically at Fiat Siena Tetrafuel, not allowing the simultaneous use of gas to liquid fuel. The demand for power is measured by the angle of the accelerator pedal. When the power demand is low, the system operates only with natural gas. When intermediate power is required, the system operates with different proportions of ethanol and natural gas. For maximum power, only ethanol is used. Comparisons were made between the conventional and the proposed system through dynamometer tests, road tests and emission analyses. The Volkswagen Gol with original system using only ethanol has a maximum power of 64.06 horses (47.77 Kilowatts) and consumption of 12.6 kilometers per liter of ethanol. With conventional aspirated natural gas system, the consumption was 21 km per cubic meter and the power did not exceed 51.82 horses (38.64 Kilowatts). With the prototype, volumetric efficiency increases by 25%, with consumption of 26.4 kilometers per cubic meter. The power management provides intermediate powers up to 51.82 horses (38.64 Kilowatts) until the maximum power of 64.06 horses (47.77 Kilowatts) in situations where more power is required. The developed system provides the benefit of refueling flexibility found in the original system, with power flexibility not available in original systems.
Bernardinello, Martina. "Optimization of a high performance engine GDI Wet System and its control via virtual analysis and experimental tests". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24587/.
Texto completoDulbecco, Alessio. "Modeling of Diesel HCCI combustion and its impact on pollutant emissions applied to global engine system simulation". Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0015/document.
Texto completoMore and more stringent restrictions concerning the pollutant emissions of Internal Combustion Engines (ICEs) constitute a major challenge for the automotive industry. New combustion strategies such as Homogeneous Charge Compression Ignition (HCCI) and the implementation of complex injection strategies are promising solutions for achieving the imposed emission standards as they permit low NOx and soot emissions, via lean and highly diluted combustions, thus assuring low combustion temperatures. This requires the creation of numerical tools adapted to these new challenges. This Ph.D presents the development of a new 0D Diesel HCCI combustion model : the dual Combustion Model (dual−CM ). The dual-CM is based on the PCM-FPI approach used in 3D CFD, which allows to predict the characteristics of Auto-Ignition and Heat Release for all Diesel combustion modes. In order to adapt the PCM-FPI approach to a 0D formalism, a good description of the in-cylinder mixture is fundamental. Consequently, adapted models for liquid fuel evaporation, mixing zone formation and mixture fraction variance, which allow to have a detailed description of the local thermochemical properties of the mixture even in configurations adopting multiple injection strategies, are proposed. The results of the 0D model are compared in an initial step to the 3D CFD results. Then, the dual-CM is validated against a large experimental database; considering the good agreement with the experiments and low CPU costs, the presented approach is shown to be promising for global engine system simulations. Finally, the limits of the hypotheses made in the dual-CM are investigated and perspectives for future developments are proposed
Mello, Valdicleide Silva e. "Estudo das propriedades f?sico-qu?micas do biodiesel e suas influ?ncias na deteriora??o dos elast?meros aplicados no sistema de inje??o dos motores diesel". Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15714.
Texto completoCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
The biodiesel use has become important due to its renewable character and to reduce environmental impacts during the fuel burning. Theses benefit will be valid if the fuel shows good performance, chemistry stability and compatibility with engines. Biodiesel is a good fuel to diesel engines due to its lubricity. Then, the aimed of this study was to verify the physicalchemistry properties of biodiesel and their correlations with possible elastomers damage after biodiesel be used as fuel in an injection system. The methodology was divided in three steps: biodiesels synthesis by transesterification of three vegetable oil (soybean, palm and sunflower) and their physical-chemistry characterization (viscosity, oxidative stability, flash point, acidity, humidity and density); pressurized test of compatibility between elastomers (NBR and VITON) and biodiesel, and the last one, analyze of biodiesels lubricity by tribological test ball-plan( HFRR). Also, the effect of mixture of biodiesel and diesel in different concentrations was evaluated. The results showed that VITON showed better compatibility with all biodiesel blends in relation to NBR, however when VITON had contact with sunflower biodiesel and its blends the swelling degree suffer higher influences due to biodiesel humidity. For others biodiesels and theirs blends, this elastomer kept its mechanical properties constant. The better tribological performance was observed for blends with high biodiesel concentration, lower friction coefficient was obtained when palm biodiesel was used. The main mechanisms observed during the HFRR tests were abrasive and oxidative wear
O uso do biodiesel tem ganhado for?a por seu car?ter renov?vel e por diminuir o impacto ambiental causado pela queima dos combust?veis f?sseis. Estes benef?cios valer?o a pena se o combust?vel apresentar bom desempenho, estabilidade qu?mica favor?vel e que n?o comprometa a integridade do sistema no qual venha a atuar. A sua aplica??o nos motores diesel tem sido indicada por apresentar maior lubricidade, que ? desej?vel para este sistema em raz?o do funcionamento da bomba. Desse modo, este trabalho teve como objetivo verificar o papel das propriedades f?sico-qu?micas do biodiesel e correlaciona-las com os poss?veis danos causados com o seu uso aos elast?meros aplicados no sistema de inje??o dos motores diesel. A metodologia foi dividida em tr?s etapas: s?ntese dos biodieseis por metan?lise a partir de tr?s oleaginosas (soja, dend? e girassol) e caracteriza??o f?sico-qu?mica (viscosidade, estabilidade oxidativa, ponto de fulgor, acidez, umidade e densidade); ensaio pressurizado de compatibilidade dos biodieseis com os elast?meros (NBR e VITON) e por fim, an?lise da lubricidade dos biodieseis atrav?s de ensaio tribol?gico esfera-plano( HFRR). Tamb?m foi avaliado o efeito da mistura do biodiesel ao diesel em diferentes propor??es, que limitam a deteriora??o dos materiais em contato com este combust?vel. O VITON apresentou maior compatibilidade com todos os combust?veis em rela??o ao NBR, no entanto para o contato com o biodiesel de Girassol e suas blendas o grau de inchamento sofreu maiores influ?ncias devido a este biodiesel apresentar maior umidade. Para as demais blendas e combust?veis analisados, este elast?mero manteve suas propriedades mec?nicas praticamente constantes. Em rela??o aos combust?veis estudados e suas blendas, os melhores desempenhos tribol?gicos foram observados para as maiores concentra??es dos biodieseis, com coeficientes de atrito menores para o biodiesel de dend?. Os principais mecanismos de desgaste observados foram abrasivo e oxidativo
CARFAGNA, GIUSEPPE. "Integrated energy interchange platform between green system of smart housing and smart mobility". Doctoral thesis, Università degli Studi di Camerino, 2018. http://hdl.handle.net/11581/408083.
Texto completoLedier, Constantin. "Application de la LIF de molécules aromatiques au dosage de carburants fossiles et biocarburants". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00661595.
Texto completoLu, Liang-Yu y 盧亮宇. "Electronic fuel injection engine analysis, system construction, fuel injection strategy research and experiment". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/qet2n3.
Texto completo元智大學
機械工程學系
106
The engines of small unmanned aerial vehicle are mostly carburetor engine in used. And the carburetor is sensitive to environmental changes, so it needs to be adjusted often. However, the electronic fuel injection engine can precisely control the fuel supply, reduce fuel consumption and increase flight time. The purpose of this study is to build an electronic fuel injection engine system for small unmanned aircraft, using a four-stroke 50cc scooter engine as the experimental object. Then replace the carburetor of the scooter with the electronic fuel injection component developed by Ecotrons, and design an ECU to integrate the components. Finally, test and compare two fuel supply strategies, and the ignition control is added to complete the fuel injection and ignition control.
Wang, Kevin y 王志凱. "Study on the Fuel Injection System of a Supercharged Engine". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/01765163743876158128.
Texto completoSu, Yu-han y 蘇育漢. "The Development of Data Acquisition for a Vehicle Fuel Injection System". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/94c5m2.
Texto completo國立虎尾科技大學
機械與機電工程研究所
97
Nowadays the measurements of the sensor signal of the engine management system in the vehicle are special purpose diagnostic tools which are primarily provided by the trade car makers. However, these instruments are often limited by the memory size of the hardware itself. This is the reason why the vehicle servicemen fail to monitor the frequency and time instant of the intermittent faults of the various sensors in engine management system over a long period of time. The objective of this research is to develop a data acquisition application program with Chinese human interface which runs in the Windows operating system environment. The research divides into two aspects: the hardware and the software. The hardware of the research mainly consists of the USB - 4711A data acquisition card produced by ADVANTECH and the Fluck 98 automotive scope. By comparing the functionality and the accuracy of measurement we can estimate the performances of the two equipments. In the software aspect, we develop the functionalities and human interfaces of the application program by using MFC of Microsoft Visual Studio 2005. The windows of the application program consist of the Profile demonstration, the parameters configuration, and the setting of voltage scale as well as time base. The functionalities of the data acquisition includes: loading from the files and displaying the results which are measured real-time from the various sensor signals. The experiment results demonstrate that the data acquisition system developed in the research is more accurate than the Fluck 98 automotive scope. The developed data acquisition system is more excellent than the Fluke 98 automotive scope in resolution, transmitting speed and flexibility. According to the results of the research, the developed data acquisition system except can satisfy the demands of the engine repair and the performance analysis. It can also save the expenses the vehicles repair needed including the repair time, spare parts, as well as has the elastic merit and so on. It’s not only a powerful and quick engine repair system but it is also a new learning system. It not only helps the servicemen speeding up the services but also increases the accuracy when diagnosis a fault engine.
Hsiung, Hsiang-Ming y 熊湘明. "Parametric Study of a Four-Stroke Motorcycle Engine with Fuel Injection System". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/37428268291221194190.
Texto completo國立臺北科技大學
車輛工程系碩士班
92
This research is a parametric study for a commercialized four-stroke 125c.c. electronic fuel injection (EFI) motorcycle engine. The electronic control unit (ECU) with 8-bit of original engine is replaced by a Motorola MC68376 32-bit microprocessor, The main purpose is to study effects of injection timing and spark advance on engine combustion characteristics and performance at various engine speed and throttle position. Then, relationship between the control variables, injection timing and spark advance, and engine performance will be set up. The conclusions from exponential results are as follows: 1. It will be easier and more flexible to adopt the embedded control system for the varies of engine control parameters. And it can reduce the time and cost for engine control system design. 2. Fuel injection timing should be varied according to the condition of engine speed and throttle position. The excess advance or delay of spark timing will affect severely to engine performance, fuel consumption, and exhaust emissions. Furthermore it will even cause engine misfire. 3. The horsepower and torque of an engine with spark timing varies with engine speed only are lower than that of an engine with spark timing varies with speed and load. The previous one also causes higher specific fuel consumption. Therefore, spark timing has to be properly controlled according to engine speed and load. 4. In the same throttle position, the minimum-spark-advance for beset torque (MBT) will be a little advanced with the increase of engine speed. That will increase the engine performance and reduce fuel consumption and exhaust emission. The experimental results of this thesis will provide a good reference for the design of motorcycle fuel injection system control. Furthermore it can reach the purpose of energy-saving, low exhaust emissions, and high engine performance.
Ferng, Junn-Yeu y 馮俊宇. "Design and Implement of the Fuel Injection System for an UAV Wankel engine". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/11679274981076565038.
Texto completo國立中興大學
機械工程學系所
97
Because of the requirements and applications in military, farming industry and meteorology measurement…etc, the development of Unmanned Air Vehicles (UAV) grows fast in recent years. One of the main requirements of an UAV engine is to have small volume, light weight with large power output, which is exactly the main advantage of a Wankel engine. Besides, the power outputs of Wankel engines are more continuous with lower variations and lesser moving parts compared with reciprocating piston engines. For these reasons, Wankel engines once again become popular in small aircraft application field. But the drawback of a wankel engine is the higher fuel consumption which is critical to an aircraft. In order to overcome this drawback, this study developed a fuel injection system for an UAV wankel engine, to improve the performance and fuel consumption of the UAV wankel engine. In this study the required thrust of an UAV in several steady fly conditions were simulated. The power requirements and operating conditions of a Wankel engine with a fixed propeller to fit the required thrust were then been calculated. Based on the result of simulation, the fuel injection system was built under several steady operating modes for the Wankel engine to improve the fuel consumption and the endurance of the UAV.
LU, WEI-CHEN y 盧韋辰. "Computer-Aided Analysis of Dual Fuel Injection System for a Spark Ignition Engine". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75017299702129684257.
Texto completo逢甲大學
航太與系統工程所
98
In this study, the computer-aided engineering(CAE)is used to simulate the combustion and thermo fluid field of a four-stroke single-cylinder spark ignition engine (SI Engine) used for power generation. In addition, the dynamic simulation of the engine is also carried out. The performance and the exhaust waste of the engine are investigated through parametric study. The main parameters include the amount of hydrogen, engine speed, the location of ignition, and the type of fuel injection. In the process of thermo fluid simulation, the dynamic model and the adaptive mesh generation are used. It is assumed that the working fluid is compressible and internal flow is turbulent. It is shown that, when an appropriate amount of hydrogen added an auxiliary fuel, it can reduce the carbon dioxide emissions, increase the thermal efficiency of the engine. However, it only reduces the power output slightly. Furthermore, the optimal thermal efficiency of the engine does not coincide with the maximum power output. Finally, if the fuels inject into the cylinder directly, the carbon dioxide emissions and the engine power output are higher than those of pre-mixed fuels before injection. However, the thermal efficiency of the engine for the first case reduce significantly.
Lin, June-Shong y 林俊雄. "Investigation of Combustion Characteristics on a Four- Stroke Motorcycle Engine with Fuel Injection System". Thesis, 1995. http://ndltd.ncl.edu.tw/handle/04512060184212158263.
Texto completoPAN, HSIEN TE y 潘顯德. "Study of Common Rail High Pressure Fuel Injection System for Large Marine Diesel Engine". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/00825578235732651523.
Texto completo國立高雄海洋科技大學
輪機工程研究所
104
In response to increasingly tough international environmental regulations and rising oil prices, the development of marine diesel engines, worth exploring in depth for. At present the mainframe manufacturers are mustering their efforts to develop high-performance fuel-efficient, saving energy and environmentally friendly hosts. The heart is the host of the high-pressure fuel injection system, fuel injection performance upgrade if the better to promote as much as possible to achieve complete combustion of fuel, so that more output horsepower can save fuel and reduce pollution of its ultimate goal. The diesel engine fuel injection after the high-pressure pump to generate sufficient pressure fuel injection pressure to the cylinder, either double or oil-type injection pump injection pressure, injection amount and injection timing by the fuel injection pump are the control, fuel pressurized by each line to the injection nozzle, and the high-pressure injection pump is a mechanical action, so that is a period of time after the parts wear out, thereby affecting the injection timing, injection pressure and injection quantity, to solve this problem, and ultimately the formation to produce high-pressure common-rail fuel injection system, the type of engine operating mode to a computer to be monitored, so the timing, injection quantity and the injection pressure can be controlled in a jet full domain of the most appropriate, complete combustion and reduce emissions, the province in order to achieve the advantages of oil and improve the performance of the engine. Marine diesel power after years of fierce competition in the shipping market, and gradually form a MAN B & W (the electronic control type of high-pressure fuel injection system) and Wärtsilä-Sulzer (RT-flex), led by two world-renowned brands. This paper will examine the highest market share of these two marine main factory, how to improve the combustion efficiency of energy-saving win performance through high-pressure common rail fuel injection system.
陳聖中. "The study of performance of the single-cylinder engine with electronic fuel injection system". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/89304168661753486127.
Texto completoMarshaus, Julie Gail. "Investigation of the injection characteristics of a new-generation digital hydraulic operating system fuel injector". 2002. http://catalog.hathitrust.org/api/volumes/oclc/51561351.html.
Texto completoTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 152-156).
Li, Zhi Wei y 李志偉. "Development of Fuel Injection System with Feedback Control for Single Cylinder 4-Shoke Gasline Engine". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/89608126981097457323.
Texto completo大葉大學
機電自動化研究所碩士班
95
The purpose of this research is to develop an electric injection control system for a single cylinder engine with active control. To the essence of HONDA 25CC four-stroke single cylinder engine, it has been converted into an electric injection engine. The intake manifold with addition of TPS sensors is replaced by the fuel injection system. We installed several sensors in the engine for the purpose of monitoring and feedback control. The closed loop control has been achieved by fed back the signal from LSU. Then the fuel injection controller was fine tuned according to the standard of vehicular pollution. The approach of this research is to use 8051chips as fuel injection system ECU. To the essence of HONDA GX-25 OHC, we modified the intake system and designed a special-purpose computer to control the fuel supply to the engine. Based on the sensed values of engine RPM, TPS Sensor and wide range O2 sensor which are the control parameters, we designed and fabricated engine ECU in order to improve and to increase horsepower and torsion of the engine. Based on a pre-planned driving schedule, we constructed an optimum fuel injection control map for the best power performance as well as the most effective air-fuel ratio. Also, we build database by optimizing injection block, fuel injection advancing angle, and ignition advancing angle. The signals of bent axle and camshaft are used to find the corresponding compression and TDC values. Finally, we program the active engine control system using C language. Based on the pre-planned driving schedule, the optimization fuel injection advancing angle, fuel injection block, and ignition advancing angle are calculated. Then fuel is injected into the engine and ignited according to intake and TDC conditions. By feedback of engine RPM and TPS, the injection block and advancing angle are determined from the database. The mechanism for air pollution control is that the LSU signal is fed back to fine turn the block of the fuel injection, and it was also the last measure to reduce air pollution. The purpose is to improve the deficiency of the commercial motorcycles of which the air-fuel ratio can not be determined. We made the special-purpose EFI computer to support fuel, and built injection control with optimization horsepower and effective air-fuel ratio. By using ECU active control and dynamical system testing machine, our experimental result can reach the environmental protection standard.
Chuan, Chen Chien y 陳建全. "The Study of Fuel Saving of a 25 cc Single-Cylinder Engine with Electronic Gasoline Injection System". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/34354545887233097642.
Texto completo大葉大學
機械工程研究所碩士班
93
ABSTRACT In this study, we used a HONDA GX-25 traditional carburetor engine, and replaced the engine’s original carburetor system with an improved fuel injection system. The ECU (Electric Control Unit) used consists of a Philips-P89C51RD2 microprocessor and sensors used to sense the rotational speed , fuel temperature, bent axle position, throttle angle, and controls the engine. The ECU provides an optimal injection duration of fuel at different throttle angles and rotational speeds as based on the A/F ratio, in order to save fuel. This engine is the smallest four-stoke engine in the market, and has an extensive range of uses. Because of the fast development of the semiconductor industry in recent years, the stability of such microprocessors have increased while costs have decreased. In comparison to carburetor engines, electric fuel injection engines have numerous advantages and are becoming the mainstream in engine development.
Loeper, C. Paul. "Diesel fuel spray studies utilizing a Caterpillar HEUI injection system in both non-evaporating and evaporating environments". 2005. http://catalog.hathitrust.org/api/volumes/oclc/61213564.html.
Texto completoTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 99-100)
Tomaselli, Michele. "Theoretical and experimental study on a mechatronic speed variator device for HD Fuel-Injection-Common Rail Pump". Doctoral thesis, 2021. http://hdl.handle.net/11589/224905.
Texto completoFrom a historical point of view, the diffusion and the great success of diesel engines were induced by the introduction of the Common-Rail System (CRS). This injection system enabled precise metering of the fuel through the injector nozzles by acting on injection timings and by regulating the common-rail pressure. Moreover, the ability to control the injection pressure made it possible to perform multiple injections, which is the crucial point for the modern diesel engine to reduce pollutant emissions. The evolution of the CRS over time is mostly related to the method used to control the rail pressure. Initially, the common-rail pressure regulation was performed by the so-called Pressure control valve (PCV). This valve was mounted directly on the common-rail or, equivalently, on the outlet port of the pump. This topology ensures a fast and precise regulation of the pressure by discharging the fuel in excess to the tank. The main drawback of this approach is represented by the pressure fluctuations due to the valve functioning, which acts as disturbances on the operation of the injectors. Furthermore, the recirculation of the compressed flow to the tank causes energy dissipation and undesired heating in the fuel tank. To overcome the disadvantages of the PCV, in the modern CRS was introduced a Fuel Metering Unit (FMU), which consists of a valve mounted on the high-pressure pump to adjusts its inlet flow and thus control the common-rail pressure. This kind of regulation reduces energy dissipation because the quantity of fuel compressed by the pump and delivered to the rail is exactly the quantity set by the ECU to obtain the proper air/fuel ratio. The new topology of CRS proposed in this work, which is still under development, introduces a Continuously Variable Transmission (CVT) between the engine and the high-pressure pump in place of a conventional gear coupling. It enables the adjustment of the pump speed according to the required common-rail pressure and demanded injection flow, thus reducing mechanical losses in the high-pressure pump. In this work, we summarize the main results obtained investigating the effectiveness of this novel approach. In particular, we present the control strategy for a complete CRS equipped with a continuously variable transmission, which has been validated in simulation, and a preliminary experimental proof of concept performed on a simplified prototype version of the system.
Wang, Hsien-Pin y 王顯斌. "Study on the Diagnostics of Evaporative System Leak by Using the Vacuum Decay Method for Fuel Injection Motorcycles". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/64265146256561609316.
Texto completo崑山科技大學
機械工程研究所
99
The study of this thesis is how to use the vacuum decay method to diagnose the evaporative system leak of motorcycles with the fuel injection system. When the engine is at idle, the vapor in the evaporative system is sucked by the intake manifold vacuum. If the parts in the system is broken, the vapor will leak out and pollute the air. In order to test whether the pipe of the system was broken or not, we can check the rate of vacuum decay by using the vacuum decay method. First, one vacuum sensor was installed in the pipe of the evaporative system near the fuel tank. One normally open solenoid valve was installed in canister inlet and another normally closed solenoid valve was installed in the feeder near the intake manifold. The vacuum in the intake manifold at idle was used to suck the vapor in the pipes, canister, and the fuel tank of the evaporation system. The rate of vacuum decay measured by the tank vacuum sensor can decide whether the evaporative system is broken or not. To avoid the engine instable or stall, the idle stability control must be equipped. The program of the fuel injection control and idle stability control was written by using the MatlabSimulink software. The PI feedback controller was to trim the injection period with the help of a wide-band O2 sensor. The opening of the idle air control valve was regulated to stabilize the idle at the same time. To imitate the evaporative system leak, the bronze tubes with 0.5 mm, 0.7 mm, 1 mm, and 1.5 mm aperture were installed in the evaporative system in experiments. The results of experiments prove the vacuum decay method can diagnose the aperture size of the tubes.
Hafez, HA. "A study of diesel-hydrogen fuel mix in a stationary compression engine". Thesis, 2007. https://eprints.utas.edu.au/2781/1/Hafez_PhD_abstract.pdf.
Texto completoŠINDELÁŘ, Jan. "Posouzení provozu motorových vozidel se vznětovými motory využívajícími systém přímého vstřikování paliva Common-Rail". Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-203321.
Texto completoМашута, Олександр Володимирович y Oleksandr Volodymyrovych Mashuta. "Проект дільниці ремонтного цеху для технічного обслуговування та ремонту системи керування двигунів ЗМЗ-40524.10 автомобілів ГАЗель з дослідженням параметрів складу відпрацьованих газів та характеристик λ-регулювання". Master's thesis, 2019. http://elartu.tntu.edu.ua/handle/lib/30123.
Texto completoThe diploma thesis designed the running and diagnostics section of the ICE and investigated the effect of the fuel mixture on the operation of the control system and the characteristics of λ-regulation.
Вступ 1 Загально-технічний розділ 2 Технологічний розділ 3. Конструкторський розділ 4 Спеціальний розділ 5 Науково-дослідний розділ 6 Проектний розділ 7 Обгрунтування економічної ефективності 8 Охорона праці та безпека в надзвичайних ситуаціях 9 Екологія Загальні висновки щодо магістерської роботи Бібліографія Додатки