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Dissertations / Theses on the topic 'Fuel-air mixture'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Zaporozhets, А., and А. Redko. "Effect of changing oxygen concentration on formation of air-fuel mixture in aviation engines." Thesis, Ceteman Printing and Copying Center, 2017. http://er.nau.edu.ua/handle/NAU/32981.

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The effect of air composition on the formation of a stoichiometric fuel -air mixture for combustion in aircraft engines is showed. A method for increasing the efficiency of burning aviation fuel, based on the actualization of information on the current concentration of oxygen in the atmosphere is proposed.

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2

Turcu, Viorel. "Combustion of the fuel/air mixture in the vicinity of a cantilevered ramp fuel injector in a hypervelocity flow." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58732.pdf.

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3

Lim, Bryan Neo Beng. "Computational simulations of fuel/air mixture flow in the intake port of a SI engine." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310769.

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4

Jackson, Simon David. "Mixture preparation process in S.I. engines with particular reference to an air assisted fuel vaporiser." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263728.

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5

Василенко, Олег Вадимович. "Совершенствование рабочего процесса двухтактного двигателя с искровым зажиганием и непосредственным впрыском топлива". Thesis, Украинский государственный университет железнодорожного транспорта, 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21849.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.05.03 – двигатели и энергетические установки. Национальный технический университет "Харьковский политехнический институт", Харьков, 2016 г. Диссертация посвящена улучшению эколого-экономических показателей двухтактных ДВС с искровым зажиганием путем применение системы непосредственного впрыска топлива в камеру сгорания. На двигателе ДН-4М проведены экспериментальные исследования с расслоением и обеднением топливновоздушного заряда при непосредственном впрыске топлива. Для обеспечения организации расслоенно

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6

Василенко, Олег Вадимович. "Удосконалення робочого процесу двотактного двигуна з іскровим запалюванням і безпосереднім вприскуванням палива". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21826.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.03 – двигуни та енергетичні установки. Національний технічний університет "Харківський політехнічний інститут". – Харків, 2016 р. Дисертація присвячена поліпшенню еколого-економічних показників двотактних ДВЗ з іскровим запалюванням шляхом застосування безпосереднього вприскування палива. Визначено, що перспективним способом внутрішнього сумішоутворення при безпосередньому вприскуванні палива є організація розшарованого паливоповітряного заряду, що забезпечує покращення еколого-економічних показників. Зап

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7

Chan, Edward C. "Spark ignition of partially stratified gaseous fuel-air mixtures." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/29566.

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The Partially Stratiﬁed Charge (PSC) strategy aims to stabilize the spark ignition of lean-burn natural gas fueled internal combustion engines. This results in an extension of unthrottled load control, as well as a reduction in regulated pollutant and carbon dioxide emissions. While engine experiments demonstrated the feasibility of this technology, its fundamental enabling mechanisms have yet to be identified. An experimental / numerical approach was taken for the current investigation, using an idealized PSC ignition system. The PSC injection took place in a constant volume combustion chambe

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8

Bokhary, Ahmad Y. F. "CFD modelling of the flow through a 4 valve I.C engine with late intake valve closure." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287684.

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9

Sharad, Kittur Rohan. "Heavy-Duty Spark-Ignited Single Cylinder Engine Fueling System." Thesis, KTH, Maskinkonstruktion (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232481.

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Forskning inom motorutveckling bedrivs för att möta kommande emissionskrav och samtidigt minska bränsleförbrukningen. Kommande förbud mot dieseldrivna fordon planeras i flera städer runt om i världen. Alternativa bränsle som exempelvis naturgas ses som en lovande ersättning även för tunga fordon. Metan som är huvudkomponenten av naturgas har en fördelaktigt förhållande mellan väte och kol vilket gör den attraktiv för CO2-reducering. Hur som helst, bränslets låga cetantal och den höga aktiveringsenergin som krävs för att tända naturgas förutsätter tändstiftsantändning.En fördel av att använda e

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10

SCARCELLI, RICCARDO. "Lean-burn operation for natural gas/air mixtures: the dual-fuel engines." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/468.

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La ricerca nel campo dei motori a combustione interna è sempre più rivolta ad identificare una soluzione alternativa all’utilizzo dei combustibili derivati dal petrolio, per ragioni di carattere ambientale, politico ed economico. Il gas naturale (NG) è un combustibile ideale per motori a combustione interna, essendo caratterizzato da basso impatto ambientale e consumi ridotti rispetto ai combustibili convenzionali (benzina e gasolio). Inoltre esso è particolarmente adatto ad essere utilizzato in motori ad elevato rapporto di compressione volumetrico, ed è caratterizzato da un ampio campo di in

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11

Clarke, Andrew. "Measurement of laminar burning velocity of air/fuel/diluent mixtures in zero gravity." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259780.

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12

Wang, Wei. "Conditional Moment Closure Model for Ignition of Homogeneous Fuel/Air Mixtures in Internal Combustion Engines." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1577882100318004.

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13

Addai, Emmanuel Kwasi [Verfasser], and Ulrich [Akademischer Betreuer] Krause. "Investigation of explosion characteristics of multiphase fuel mixtures with air / Emmanuel Kwasi Addai ; Betreuer: Ulrich Krause." Magdeburg : Universitätsbibliothek, 2016. http://d-nb.info/1117085961/34.

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14

Nevot, Cercós Javier. "Diseño de un controlador avanzado basado en redes neuronales para la gestión de la mezcla aire-gasolina en un motor alternativo." Doctoral thesis, Universitat Politècnica de Catalunya, 2000. http://hdl.handle.net/10803/5933.

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En la presente tesis se desarrolla un sistema de control de la mezcla de aire y gasolina en un motor alternativo de cuatro tiempos, basado en redes neuronales. Para que el catalizador logre un grado de depuración aceptable con todos los gases contaminantes simultáneamente, debe mantenerse la proporción de aire y combustible, dentro de una banda muy estrecha. En estado estacionario, este objetivo se cumple sin demasiados problemas, pero el funcionamiento habitual de un vehículo es en régimen muy transitorio, donde los sistemas convencionales no logran evitar desviaciones importantes del punto d

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15

Mbarawa, M., NA Kakutkina, and Korzhavin AA. "Experimental investigation on peculiarities of the filtration combustion of the gaseous fuel-air mixtures in the porous inertia media." Journal of Mechanical Science and Technology, 2007. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000859.

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This study investigates peculiarities of the filtration combustion (FC) of the gaseous fuel-air mixtures in a porous inertia media (PIM). Combustion wave velocities and temperatures were measured for hydrogen-air, propane-air and methane-air mixtures in the PIM at different mixture filtration velocities. It is shown that the dependences of the combustion wave velocities on the equivalence ratio are V-shaped, It was further confirmed that the FC in the PIM has more contrasts than similarities with the normal homogeneous combustion. One of the interesting observations in the present study, which

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16

Löbbert, Philipp. "Möglichkeiten und Grenzen der Teillaststeuerung von Ottomotoren mit vollvariablem Ventilhub." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1161694131099-10201.

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Im Rahmen dieser Arbeit werden die Potenziale zur Steigerung des Gesamtwirkungsgrads von stöchiometrisch homogen betriebenen Ottomotoren in der Teillast untersucht. Im Gegensatz zur konventionellen Laststeuerung über die Drosselklappe bezeichnet die betrachtete, drosselfreie Laststeuerung die Quantitätsregelung einzig über den Hubverlauf der Gaswechselventile. Nach einer Zusammenfassung bisheriger Untersuchungen zur drosselfreien Laststeuerung werden konkurrierende Bilanzierungsverfahren von Ladungswechsel- und Hochdruckteil von 4-Takt Verbrennungsverfahren vorgestellt. Anhand theoretischer Be

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17

Lin, Chun-Wei, and 林俊維. "Influence of Fuel Injector Arrangement on Fuel/Air Mixture Characteristic." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/vyn6bg.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>107<br>The in-cylinder flow characteristics of a single-cylinder, two-stroke motorcycle engine, which would affetct the mixing and combustion performance were studied. A commercial engine with displancement of 115 c.c. was used as the benckmark which was hereafter called the “original engine”. The computational fluid dynamic software CONVERGE was used to calculate fuel distributions, fuel distribution at ignition, concentration variation, air-fuel ratio at ignition, air-fuel ratio near the spark plug at ignition and tumble ratio as main physical parameters by optimiz

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18

Kan, Hung-Chi, and 甘宏基. "Lean Air/Fuel Mixture Control for Fuel Injection Engine of Motorcycles." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/yk932d.

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碩士<br>崑山科技大學<br>機械工程研究所<br>96<br>In motorcycle, the air/fuel mixture ratio is controlled around the stoichiometric value of 14.7 to improve the conversion efficiency of the catalytic converter and reduce the contained exhaust gas. But in such stoichiometric operation the fuel consumption of the motorcycles will be higher. So far the motorcycles in Taiwan are already equipped with the secondary air device to increase the quantity of oxygen in the exhaust gas to raise the efficiency of the catalytic converter (oxidation catalyst). This project proposes the concept of lean air/fuel mixture to red

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19

Huang, Han-Hsuan, and 黃瀚宣. "Research on the Neural Network Estimator Applied on theLean Air/Fuel Mixture Control for Motorcycles." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/18069060070369297180.

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碩士<br>崑山科技大學<br>機械工程研究所<br>99<br>This thesis proposes a research on the neural network estimator applied on the lean air/fuel mixture control for motorcycles. This NN estimator can estimate the air/fuel ratio under different transient load conditions and help the engine control the air/fuel ratio at 16:1. Using NN estimator can result in the reduction of fuel consumption and improve the power output delay due to instantaneous throttle opening and air/fuel ratio too lean (near 18:1). First, using Matlab/Simulink software, the closed-loop fuel injection control system was written and the air/fue

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20

Marchitto, Luca. "Characterization of air/fuel mixture and combustion processes in a DISI engine through advanced optical and X-ray based diagnostics." Tesi di dottorato, 2015. http://www.fedoa.unina.it/10318/1/Marchitto_Luca.pdf.

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The present dissertation has investigated the influence of injection parameters on air/fuel mixture and combustion processes in a DISI engine, through advanced diagnostics. It is possible to distinguish three parts of the work: the spray macroscopic parameters characterization, the spray break-up investigation and the study of the effects of injection timing and duration on the combustion process. In the first stage, the influence of injection pressure and duration on the fuel mass rate and the spray morphology has been analysed. A fuel injection rate meter based on the Bosch Tube principle h

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21

Kashava, Murthy T. V. "Combustion characteristics of multicomponent-fuel-air mixtures." Thesis, 2005. http://localhost:8080/iit/handle/2074/5152.

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