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Dissertations / Theses on the topic 'SI-engine'

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Published: 4 June 2021

Last updated: 26 July 2025

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1

Westin, Fredrik. "Accuracy of turbocharged SI-engine simulations." Licentiate thesis, KTH, Machine Design, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1491.

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<p>This licentiate thesis deals mainly with modelling ofturbocharged SIengines. A model of a 4-cylinder engine was runin both steady state and transient conditions and the resultswere compared to measured data. Large differences betweenmeasurements and simulations were detected and the reasons forthis discrepancy were investigated. The investigation showedthat it was the turbocharger turbine model that performed in anon-optimal way. To cope with this, the turbine model containedparameters, which could be adjusted so that the model resultsmatched measured data. However, it was absolutely necess

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2

Renberg, Ulrica. "1D engine simulation of a turbocharged SI engine with CFD computation on components." Licentiate thesis, KTH, Machine Design (Div.), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9162.

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<p>1D engine simulations of turbocharged engines are difficult to </p><p>Techniques that can increase the SI- engine efficiency while keeping the emissions very low is to reduce the engine displacement volume combined with a charging system. Advanced systems are needed for an effective boosting of the engine and today 1D engine simulation tools are often used for their optimization.</p><p>This thesis concerns 1D engine simulation of a turbocharged SI engine and the introduction of CFD computations on components a

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3

Niekamp, Troy S. (Troy Steven). "Translation of dilution tolerance for gasoline SI engine." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81616.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 69-70).<br>There are a variety of fuel improvement strategies being developed for spark ignition engines which use dilution. Many of these technologies use a combination of different diluents. It is impractical in optimizing these technologies to test every possible combination of diluents. The purpose of this study was to determine a relationship between the various diluents and combustion related output parameters. On

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4

Frisk, Erik. "Model-based fault diagnosis applied to an SI-Engine." Thesis, Linköpings universitet, Fordonssystem, 1996. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-141630.

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A diagnosis procedure is an algorithm to detect and locate (isolate) faulty components in a dynamic process. In 1994 the California Air Resource Board released a regulation, called OBD II, demanding a thorough diagnosis system on board automotive vehicles. These legislative demands indicate that diagnosis will become increasingly important for automotive engines in the next few years. To achieve diagnosis, redundancy has to be included in the system. This redundancy can be either hardware redundancy or analytical redundancy. Hardware redundancy, e.g. an extra sensor or extra actuator, can be s

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5

Tidefelt, Henrik. "Applied Output Error Identification: SI Engine Under Normal Operating Conditions." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2380.

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<p>This report presents work done in the field of output error identification, with application to spark ignition (SI) engine identification for the purpose of air to fuel ratio control. The generic parts of the project consist mainly in setting out the basis for the design of output error identification software. Efficiency issues related to linear state space models have also been explored, and although the software design is not made explicit in this report, many of the important concepts have been implemented in order to provide powerful abstractions for the application to SI engine identi

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6

Goldwitz, Joshua A. (Joshua Arlen) 1980. "Combustion optimization in a hydrogen-enhanced lean burn SI engine." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27061.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>Includes bibliographical references (p. 95-97).<br>Lean operation of spark ignition (SI) automotive engines offers attractive performance incentives. Lowered combustion temperatures inhibit NO[sub]x pollutant formation while reduced manifold throttling minimizes pumping losses, leading to higher efficiency. These benefits are offset by the reduced combustion speed of lean mixtures, which can lead to high cycle-to-cycle variation and unacceptable engine behavior characteristics. Hydrogen-enhancement

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7

Westling, Joel, and Haris Subasic. "Effects and Models of Water Injection in an SI Engine." Thesis, Linköpings universitet, Fordonssystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148952.

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Downsizing and turbocharging is a popular combination nowadays in cars inorder to decrease the fuel consumption. However, the boost pressure increasesthe risk of engine knock, limiting the engine in high-load operating points. Inthe current engines, fuel is used to cool the engine in these operating points,leading to a higher fuel consumption. Water injection is an effective method tomitigate knock and enable a more aggressive ignition. It enables the engine toproduce more power and cools the exhaust, thereby protecting the turbochargerand the catalyst from wear. In this thesis, the effects of

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8

Kapadia, Bhavin Kanaiyalal. "Development Of A Single Cylinder SI Engine For 100% Biogas Operation." Thesis, Indian Institute of Science, 2006. https://etd.iisc.ac.in/handle/2005/283.

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This work concerns a systematic study of IC engine operation with 100% biogas as fuel (as opposed to the dual-fuel mode) with particular emphasis on operational issues and the quest for high efficiency strategies. As a first step, a commercially available 1.2 kW genset engine is modified for biogas operation. The conventional premixing of air and biogas is compared with a new manifold injection strategy. The effect of biogas composition on engine performance is also studied. Results from the genset engine study indicate a very low overall efficiency of the system. This is mainly due to the

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9

Kapadia, Bhavin Kanaiyalal. "Development Of A Single Cylinder SI Engine For 100% Biogas Operation." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/283.

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This work concerns a systematic study of IC engine operation with 100% biogas as fuel (as opposed to the dual-fuel mode) with particular emphasis on operational issues and the quest for high efficiency strategies. As a first step, a commercially available 1.2 kW genset engine is modified for biogas operation. The conventional premixing of air and biogas is compared with a new manifold injection strategy. The effect of biogas composition on engine performance is also studied. Results from the genset engine study indicate a very low overall efficiency of the system. This is mainly due to the ve

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10

Gustafsson, Karin. "Ion Current Dependence on Operating Condition and Ethanol Ratio." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8053.

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<p>This masters thesis investigates the possibility to estimate the ethanol content in the fuel using ion currents. Flexible fuel cars can be run on gasoline-ethanol blends with an ethanol content from0 to 85 percentage. It is important for the engine control system to have information about the fuel. In todays cars the measurements of the fuel blend are done by a sensor. If it is possible to do this with ion currents this can be used to detect if the sensor is broken, and then estimate the ethanol content until the sensor gets fixed. The benefit</p><p>of using ion currents is that the signal

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11

Argolini, Roberto, and Viviana Bloisi. "On optimal control of the wastegate in a turbocharged SI engine." Thesis, KTH, Reglerteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-106241.

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The project aims to improve positive torque transient response through more advanced wastegate controllers than what are used today. All controllers are developed for a standard General Motors turbocharged engine. In many turbocharged SI engines, a wastegate is used for preventing the turbine to overrun and to decrease the pumping loss. Today, the wastegate is controlled by a PI controller, which tries to fulfill a compromise between fuel consumption and torque response by regulating the wastegate position. A nonlinear Mean Value Engine Model (MVEM) of this engine, with 13 states and linearize

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12

Etheridge, Jonathan Edward. "Modelling the SI-HCCI transition in a GDI internal combustion engine." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609621.

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13

Summers, Tim. "Fast-response FID measurement of SI engine residual gas hydrocarbon concentration." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/272772.

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14

Coates, Barnaby Paul. "Investigation of engine design parameters on the efficiency and performance of the high specific power downsized SI engine." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/12404.

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This study investigates the impact of employing the Miller cycle on a high specific power downsized gasoline engine by means of Early Intake Valve Closing (EIVC) and Late Intake Valve Closing (LIVC). This investigation assesses the potential for the Miller cycle to improve fuel economy at part load points, as well as high load points with significantly elevated boost pressures (Deep Miller) of up to 4 bar abs. The impact of geometric Compression Ratio (CR) and Exhaust Back Pressure (EBP) has also been investigated. The knock mitigating qualities of Deep Miller have been assessed, and its abili

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15

Rosén, Anna. "Air/Fuel Ratio Control of an SI-Engine Under Normal Operation Conditions." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2448.

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<p>Emission from cars today is one of the biggest environmental issues, hence stringent government standards have been introduced to decrease emission. Car companies do not only have to satisfy government standards, but also meet consumer demands on increased fuel economy and good drivablility. This report will introduce controllers designed to control the air/fuel ratio in an SI engine. The engine model used is simplified. The engine components modelled include the inlet manifold, fuel dynamics, combustion and exhaust sensor. </p><p>Nonlinearities and delays are inherent in the engine dynamic

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16

Hadjiconstantinou, Nicolas G. (Nicholas George). "A model for conversting SI engine flame arrival signals into flame contours." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35444.

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17

Bai, Yang. "Studies on SI engine simulation and air/fuel ratio control systems design." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/8342.

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More stringent Euro 6 and LEV III emission standards will immediately begin execution on 2014 and 2015 respectively. Accurate air/fuel ratio control can effectively reduce vehicle emission. The simulation of engine dynamic system is a very powerful method for developing and analysing engine and engine controller. Currently, most engine air/fuel ratio control used look-up table combined with proportional and integral (PI) control and this is not robust to system uncertainty and time varying effects. This thesis first develops a simulation package for a port injection spark-ignition engine and t

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18

Thornberg, Nils, and Kraft Jonas Eriksson. "Physically Based Modelling for Knock Prediction in SI Engines." Thesis, Linköpings universitet, Fordonssystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-149020.

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The high demand for an increase in performance and at the same time loweringthe emissions is forcing the automotive industry to increase the efficiency of thevehicles. This demand lead to a problem called knock, which often is the limitingfactor when increasing the efficiency of the engine. Knock occurs when theunburned gases inside the combustion chamber self-ignites due to the increasingpressure and temperature.This thesis investigates if it is possible to predict knock with a physicallybased knock model. The model consist of several sub-models such as pressuremodel, temperature model and kn

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19

Hashemzadeh, Nayeri Mohit. "Cylinder-by-Cylinder Torque Model of an SI-Engine for Real-Time Applications." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5396.

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<p>In recent years Hardware-in-the-Loop HiL, has gained more and more</p><p>popularity within the vehicle industry. This is a more cost effective research alternative, as opposed to the tests done the traditional way, since in HiL testing the idea is to test the hardware of interest, such as an electronic control unit, in a simulated (or partially simulated) environment which closely resembles the real-world environment.</p><p>This thesis is ordered by Daimler Chrysler AG and the objective of this thesis is the developing of a cylinder-by-cylinder model for the purpose of emulation of misfire

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20

Kalian, Navin. "Investigation of CAI/SI operations ina a four-cylinder direct injection gasoline engine." Thesis, Brunel University, 2006. http://bura.brunel.ac.uk/handle/2438/5482.

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A four-cylinder, four-stroke, gasoline engine with direct injection fuel was commissioned and used to achieve CAI combustion. CAI combustion was achieved by employing short-duration, low-lift camshafts and early exhaust valve closure. Trapping sufficient volumes of exhaust residual provided the necessary thermal energy needed to initiate auto-ignition. The effects of valve opening durations on the CAI operation range were investigated at different air/fuel ratios, valve timings and injection timings. Furthermore the effect on engine performance, exhaust emissions, fuel consumption and combusti

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21

Hardy, AliciA Jillian Jackson 1978. "Vehicle fuel economy benefit and aftertreatment requirement of an HCCI-SI engine system." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42986.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (v. 2, p. 821-823).<br>This body of work dimensions the HCCI fuel economy benefits and required aftertreatment performance for compliance with emissions regulations in North America and Europe. The following parameters were identified as key factors influencing the benefit of implementing HCCI over driving cycle: * Power-to-weight ratio * Operation range of HCCI * Conditions of the driving cycle * Application of constraints that cause "un-natural" mode transitio

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22

Fox, Jonathan Wetmore. "Effects of fuel injection strategy on HC emissions during SI engine start-up." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13107.

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23

Rezapour, Kambiz. "Exergy Based SI Engine Model Optimisation. Exergy Based Simulation and Modelling of Bi-fuel SI Engine for Optimisation of Equivalence Ratio and Ignition Time Using Artificial Neural Network (ANN) Emulation and Particle Swarm Optimisation (PSO)." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5386.

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In this thesis, exergy based SI engine model optimisation (EBSIEMO) is studied and evaluated. A four-stroke bi-fuel spark ignition (SI) engine is modelled for optimisation of engine performance based upon exergy analysis. An artificial neural network (ANN) is used as an emulator to speed up the optimisation processes. Constrained particle swarm optimisation (CPSO) is employed to identify parameters such as equivalence ratio and ignition time for optimising of the engine performance, based upon maximising 'total availability'. In the optimisation process, the engine exhaust gases standard emiss

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24

Grasreiner, Sebastian. "Combustion modeling for virtual SI engine calibration with the help of 0D/3D methods." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2012. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-90518.

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Spark ignited engines are still important for conventional as well as for hybrid power trains and are thus objective to optimization. Today a lot of functionalities arise from software solutions, which have to be calibrated. Modern engine technologies provide an extensive variability considering their valve train, fuel injection and load control. Thus, calibration efforts are really high and shall be reduced by introduction of virtual methods. In this work a physical 0D combustion model is set up, which can cope with a new generation of spark ignition engines. Therefore, at first cylinder ther

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25

Ayala, Ferran A. (Ferran Alberto) 1976. "Combustion lean limits fundamentals and their application to a SI hydrogen-enhanced engine concept." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38262.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (p. 197-199).<br>Operating an engine with excess air, under lean conditions, has significant benefits in terms of increased engine efficiency and reduced emissions. However, under high dilution levels, a lean limit is reached where combustion becomes unstable, significantly deteriorating drivability and engine efficiency, thus limiting the full potential of lean combustion. Due to hydrogen's high laminar flame speed, adding a hydrogen-rich mixture with gasoline

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26

Gerty, Michael D. "Effects of operating conditions, compression ratio, and gasoline reformate on SI engine knock limits." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32369.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (p. 133-135).<br>A set of experiments was performed to investigate the effects of air-fuel ratio, inlet boost pressure, hydrogen rich fuel reformate, and compression ratio on engine knock behavior. For each condition the effect of spark timing on torque output was measured. Knock limited spark advance was then found for a range of octane number (ON) for each of three fuel types; primary reference fuels (PRFs), toluene reference fuels (TRFs), and test gasolines. A

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27

Filippou, Sotirios. "Virtual sensor for air mass flow measurement in an SI engine: Application of distributed lumped modelling in prediction of air mass flow into the cylinder of SI combustion engines." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17450.

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After undergoing an extensive study about engine air mass flow measurement approaches as well as engine modelling for air mass flow prediction, a major problem found to exist is that engineers have still not found a suitable technique to accurately measure the air mass flow entering the cylinder of an internal combustion engine. The engine air mass flow is the most important parameter needed during engine development so the fuel control can be accurately calibrated and as a result increase performance and reduce emission output of an engine. The current methods used to determine the air mass f

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28

Lindén, Erik, and David Elofsson. "Model-based turbocharger control : A common approach for SI and CI engines." Thesis, Linköpings universitet, Institutionen för systemteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70288.

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In this master’s thesis, a turbine model and a common control structure for theturbocharger for SI and CI-engines is developed. To design the control structure,simulations are done on an existing diesel engine model with VGT. In order tobe able to make simulations for engines with a wastegated turbine, the model isextended to include mass flow and turbine efficiency for that configuration. Thedeveloped model has a mean absolute relative error of 3.6 % for the turbine massflow and 7.4 % for the turbine efficiency. The aim was to control the intake manifoldpressure with good transients and to us

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29

Zheng, Jincai Cernansky N. P. Miller David L. "A study of homogeneous ignition and combustion processes in CI, SI, and HCCI engine systems /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/557.

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30

Alrayyes, Taleb. "The effect of ethanol-gasoline blends on SI engine energy balance and heat transfer characteristics." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/29749/.

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Ethanol is one of a group of hydrocarbon fuels produced from bio-mass which is attracting interest as an alternative fuel for spark ignition engines. Major producers of ethanol include Brazil, from sugar cane, and the USA, from com. Reasons for the growing interest in ethanol include economic development, security of fuel supply and the reduction of net emissions of carbon dioxide relative to levels associated with the use of fossil fuels. Unlike gasoline, which is a mixture of hydrocarbon compounds suited to meet a range of start and operating requirements, ethanol is a single component fuel

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31

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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32

Luo, Kai Hong. "Experimental measurement and numerical simulation of induction port flow of a four-valve SI engine." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358318.

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33

Pischinger, Stefan. "Effects of spark plug design parameters on ignition and flame development in an si-engine." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14433.

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34

Gu, Jiayi. "Chemical kinetics modelling study of naturally aspirated and boosted SI engine flame propagation and knock." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17356.

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Modern spark ignition engines are downsized and boosted to meet stringent emission standards and growing customer demands on performance and fuel economy. They operate under high intake pressures and close to their limits to engine knock. As the intake pressure is increased knock becomes the major barrier that prevents further improvement on downsized boosted spark ignition engines. It is generally accepted that knock is caused by end gas autoignition ahead of the propagating flame. The propagating flame front has been identified as one of the most influential factors that promote the occurren

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35

Criscuolo, Ivan. "Optimization of SI and CI engine control strategies via integrated simulation of combustion and turbocharging." Doctoral thesis, Universita degli studi di Salerno, 2013. http://hdl.handle.net/10556/902.

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2010 - 2011<br>Combustion engines have been for a long time the most important prime mover for transportation globally. A combustion engine is simple in its nature; a mix of fuel and air is combusted, and work is produced in the operating cycle. The amount of combusted air and fuel controls the amount of work the engine produces. The engine work has to overcome friction and pumping losses, and a smaller engine has smaller losses and is therefore more efficient. Increasing engine efficiency in this way is commonly referred to as downsizing. Downsizing has an important disadvantage; a smal

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36

KHESHTINEJAD, HAMED. "Investigation Into Advanced Architecture and Strategies For Turbocharged Compressed Natural Gas Heavy Duty SI-engine." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2689169.

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CNG is at present retaining a growing interest as a factual alternative to traditional fuel for SI engine thanks to its high potentials in reducing the engine-out emissions. Increasing thrust into the exploitation of NG in the transport field is in fact produced by the even more stringent emission regulations which are being introduced into the worldwide scenario. Specific attention is also to be devoted to heavy duty engines given the high impact they retain due to the diesel oil exploitation and to the PM emissions, the latter issue assessing for the need to shift towards alternative fuels s

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Tippett, Esther Claire. "The effects of combustion chamber design on turbulence, cyclic variation and performance in an SI engine." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/28071.

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An experimental program of motored and fired tests has been undertaken on a single cylinder spark ignition engine to determine the influence of combustion chamber design on turbulence enhancement in the achievement of fast lean operation. Flow field measurements were taken using hot wire anemometry in the cylinder during motored operation. On line performance tests and in-cylinder pressure data were recorded for the operation of the engine by natural gas at lean and stoichiometric conditions over a range of speed and loads. Squish and squish jet action methods of turbulence enhancement were

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Costanzo, Vincent S. (Vincent Stanley) 1979. "Effect of in-cylinder liquid fuel films on engine-out unburned hydrocarbon emissions for SI engines." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65276.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, February 2011.<br>"February 2011." Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 265-270).<br>Nearly all of the hydrocarbon emissions from a modern gasoline-fueled vehicle occur when the engine is first started. One important contributing factor to this is the fact that, during this time, temperatures throughout the engine are low - below the point at which all of the components of the gasoline can readily vaporize. Consequently, any fuel that enters the combustion chambe

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Westin, Fredrik. "Simulation of turbocharged SI-engines - with focus on the turbine." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216.

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40

Andersson, Henrik. "Model Based Control of Throttle, EGR and Wastegate : A System Analysis of the Gas Flows in an SI-Engine." Thesis, Linköpings universitet, Fordonssystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-140533.

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Due to governmental requirements on low exhaust gas emissions and the drivers request of fast response, it is important to be able to control the gas flow in a spark ignited engine accurately. The air into the cylinder is directly related to the torque generated by the engine. The technique with recirculation of exhaust gases (EGR) affect the air flow into the cylinder and increase the complexity of the control problem. In this thesis a mean value model for a spark ignited engine has been created. The basis was a diesel model from Linköping University that has been modified and parameterized w

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41

Ghauri, Ahmar. "An investigation into the effects of variable valve actuation on combustion and emissions in an SI engine." Thesis, University College London (University of London), 1999. http://discovery.ucl.ac.uk/1317999/.

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The work reported in this thesis was conducted to study the effects of variable valve actuation on combustion, emissions, and fuel economy in a modern design of 4-valve per cylinder SI engine. The use of statistically-based procedures for the design of experiments allowed a limited number of tests to be used to explore a wide region of each of the experimental variables. A series of steady-flow tests was conducted to assess the effects of valve lift on flow past the valves and the nature of any in-cylinder motion generated. Results from the former were incorporated into a filling and emptying

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42

Hasan, Ahmad Omar. "Influence of prototype three way catalytic converter on regulated and unregulated emissions from gasoline HCCI/SI engine." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/2944/.

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Designing automotive catalysts for the effective control of NOx, HC (Hydrocarbon) and CO (Carbon Monoxide) emissions under both lean and stoichiometric engine operation is a challenging task. The research presented in this thesis assesses the performance efficiency of a three-zone prototype catalytic converter in reducing exhaust emissions from a gasoline engine, operating in HCCI (Homogeneous Charge Compression Ignition) and SI (Spark Ignition) mode under lean and stoichiometric conditions. The research was carried out using Jaguar V6 engine operating in SI and HCCI mode using commercial unle

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Hsin-wei, Chiu, and 邱信瑋. "Study of SI Engine System Dynamic Response Identification." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/74687644127291958964.

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碩士<br>大葉大學<br>車輛工程學系碩士班<br>94<br>This study used different system identification approach to establish the dynamic model for SI engine system response. The input signals are the throttle position opening in percentage and engine torque, and output signal are the engine speed and MAP. Different system identification methods were applied including ARX(Auto-Regressive Xogeneous), ARMAX(Auto- Regressive Moving Average Xogeneous), BJ(Box and Jenkins), OE(Output Error) and NN(Neural Network). The different model order and parameters for each method were used to compare the experimental data to find

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Lin, JianChen, and 林建成. "The Application of Methanol Fuel on SI Engine." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/81424213089424947664.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>87<br>Methanol is an oxygenated compound. The exhaust of the engine running with the mixture of methanol and gasoline may thus be improved. In this work, the effect of various volume fractions of methanol (0%, 5%, 15%, and 25%) is explored. The control parameters of the work are the fuel mixture ratio (X), the speed (1000, 1500, 2000, and 2500rpm), load (10, 20, 30, and 40N-m), and the fuel/air equivalence ratio (ψ). The emissions of HC, CO, NOx in the exhausts, the temperature of the exhausts and the brake specific fuel consumption (bsfc) of the engine are measured

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tseng, yuan-shiu, and 曾元旴. "Study on performance of small turbocharger SI engine." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/10899257290568969766.

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碩士<br>逢甲大學<br>材料與製造工程所<br>100<br>In this study, a small SI engine (Mitsubishi EY20D) is analyzed theoretically and select a small turbocharger (Hitachi HT06) for matching. The intake and exhaust pipe is designed, and the fuel mixture ratio, ignition timing and valve clearance are adjusted to complete the experimental equipment of a suck-through small carburetor gasoline single-cylinder turbocharged engine. The Nm and Brake Horse Power (BHP) are obtained by electric-dynamometer. The bsfc is determined in a fixed speed by the fuel consumption measurements. The CO (in %) and HC (in ppm) are det

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Boddez, Jason Bradley. "Evaluation of SI-HCCI-SI mode-switching using conventional actuation on a CNG engine." Master's thesis, 2011. http://hdl.handle.net/10048/1825.

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Homogeneous Charge Compression Ignition (HCCI) operation is desirable for its high thermal efficiency and low emissions of NOx and particulates. Difficulty with cold starting and maximum achievable speed/load highlight the desire for mode-switching to traditional spark ignition (SI) operation. Mode-switching between SI and HCCI is investigated using only actuation of throttle, CNG injector pulse width, and CNG injection timing on a single cylinder CFR engine. Open-loop control achieves a one cycle mode-switch between two adjustable IMEP levels. Sequences are repeatable as demonstrated by 10 m

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Rezapour, Kambiz, Byron A. Mason, Alastair S. Wood, and Kambiz M. Ebrahimi. "Bi-fuel SI Engine Model for Analysis and Optimization." 2014. http://hdl.handle.net/10454/10983.

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Yes<br>The natural gas as an alternative fuel has economical and environmental benefits. Bi-fuel engines powered by gasoline and compressed natural gas (CNG) are an intermediate and alternative step to dedicated CNG engines. The conversion to bi-fuel CNG engine could be a short-term solution to air pollution problem in many developing countries. In this paper a mathematical model of a bi-fuel four-stroke spark ignition (SI) engine is presented for comparative studies and analysis. It is based on the two-zone combustion model, and it has the ability to simulate turbulent combustion. The model i

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Chou, Jun-Nan, and 周俊男. "A Study of Combustion Thermal Efficiency of SI Engine." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/64949760153157227841.

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碩士<br>大葉大學<br>機械工程研究所<br>88<br>In an engine cycle, combustion thermal efficiency is the most important factor to affect engine performance. How to convert the heat released from combustion into engine brake work efficiently is the main concern of an engine designer. This research looks into the conversion efficiency of an engine deeply by zero-dimensional model together with heat release analysis method. By changing the relevant parameters of engine combustion, such as efficiency parameter a, form factor m, crank angle of start of combustion, combustion duration angle and speed of e

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Lee, Ming-Chun, and 李明俊. "Ignition Timing on SI Engine Performance Effect by Acetone." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/92114003961167235874.

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碩士<br>國立彰化師範大學<br>車輛科技研究所<br>101<br>In recent years, the alternative fuels were respect to developed with environmental considerations and petroleum fuels price increase and global warming effect. In this study, using acetone as oxygen additive blended with unleaded gasoline, on four cylinder four stroke spark ignition engine control with variable ignition timing under wide open throttle to measure the effect on engine performance and exhaust emissions were investigated. The results showed that the HC、NOX would be decreased with increasing the ratio of an oxygen additive and retarding the igni

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Huang, Jun-Yi, and 黃俊逸. "MIMO System Identification of Four-Stroke SI Engine Dynamic Research." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63012485262780081922.

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碩士<br>大葉大學<br>車輛工程學系碩士班<br>93<br>This study proposed a methodology to identify the dynamic characteristics of a four stroke SI engine which are important for system control and performance evaluation. Since the engine performance parameters are complicated correlated with the control parameters and operating variables, the engine system plant becomes a random, time-varying, nonlinear and multi-input and output dynamic relation. Engine simulation models used to explore the internal flow and thermal field are multidimensional complicated codes, which are not proper be used in engine real-time co

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