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Dissertations / Theses on the topic 'Valve system'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Nordqvist, Mathias, and Olle Svensson. "Electrification of valve system." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264516.

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This report is going to investigate the possibility to save energy by converting a valve opening mechanism in a waste disposal system from a pneumatic system to an electric system. To power the system, which mainly consists of an electric actuator and a valve control module, a solar panel system was designed. The valve system was controlled by the lightweight messaging protocol MQTT. To be able to choose an electric actuator the needed force was measured and data regarding maximal stroke was taken from the data sheet of the existing setup. For developing an optimal solar panel system a program

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2

Ericson, Claes. "Mean value modelling of a poppet valve EGR-system." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2472.

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<p>Because of new emission and on board diagnostics legislations, heavy truck manufacturers are facing new challenges when it comes to improving the engines and the control software. Accurate and real time executable engine models are essential in this work. One successful way of lowering the NOx emissions is to use Exhaust Gas Recirculation (EGR). The objective of this thesis is to create a mean value model for Scania's next generation EGR system consisting of a poppet valve and a two stage cooler. The model will be used to extend an existing mean value engine model. Two models of different c

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3

Damen, Bas Stefaan, and bsdamen@hotmail com. "Design, Development, and Optimisation of a Culture Vessel System for Tissue Engineering Applications." Swinburne University of Technology. n/a, 2003. http://adt.lib.swin.edu.au./public/adt-VSWT20040512.125051.

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A Tissue Engineering (TE) approach to heart valve replacement has the aim of producing an implant that is identical to healthy tissue in morphology, function and immune recognition. The aim is to harvest tissue from a patient, establish cells in culture from this tissue and then use these cells to grow a new tissue in a desired shape for the implant. The scaffold material that supports the growth of cells into a desired shape may be composed of a biodegradable polymer that degrades over time, so that the final engineered implant is composed entirely of living tissue. The approach used at Sw

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4

Watkins, Jonathan S. "An Investigation of Euphonium Valve System Design." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1703405/.

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The four-valve automatic compensating system as developed by David James Blaikley has become an integral part of the professional euphonium in use today. While the Blaikley system was designed to allow a euphonium to play chromatically down to the fundamental pitch of the instrument, it was hardly the only design to do so. Using a historical analysis of euphonium valve systems, the case is made for why Blaikley's design has been widely adopted in the face of criticism about the four-valve automatic compensating system. The analysis also clarifies the viability of Blaikley's, as well as others'

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5

Jun, Hwandon. "Strategic valve locations in a water distribution system." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/27875.

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Valves play a critical role in a water distribution system for subsystem isolation and flow or pressure control. Among them, subsystem isolation is required to repair or to rehabilitate a broken component and can be done by closing adjacent valves. To evaluate the role of valves, the concept of â Segmentâ is necessary. A segment consists of a set of pipes and nodes isolated together by closing adjacent valves when a pipe fails. An efficient algorithm to identify segments in a water distribution system is proposed. In addition, when a segment is isolated, an additional subsystem may be disco

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6

Luo, Yamin. "System modeling and control design of a two-stage metering poppet-valve system." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4453.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 18, 2008) Vita. Includes bibliographical references.

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7

Gupta, Snegdha. "System improvements in valve manufacturing cell at Waters Corporation." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85794.

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Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 132).<br>This thesis addresses the challenge of improving on-time delivery performance of stators in the high mix valve manufacturing cell at the Milford facility of Waters Corporation with a focus on efficient line design without exceeding the average WIP levels observed in the current system. A detailed study of the current process was done and it was concluded that the poor on-time delivery

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8

Bryan, Charles Edward. "An electron beam addressed liquid crystal light valve projector." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235841.

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The contents of this dissertation relate to a liquid crystal light valve which is addressed by an electron beam. The light valve has been configured with a computer aided designed optical projection system, to produce an electron beam addressed liquid crystal light valve projector. The projector is capable of turning an electrical signal into a corresponding projected picture. A minimum resolution of 33um was demonstrated in a smectic-A liquid crystal light valve and one of 40um in a dyed phase change guest-host liquid crystal light valve. The diameter of the active area of the light valve was

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9

Zhao, Junfeng. "A Fully Flexible Valve Actuation System for internal combustion engines." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12919.

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Air pollution, global warming, and rising gasoline prices have lead governments, environmental organizations, and consumers to pressure the automotive industry to improve the fuel efficiency of cars. Since alternative fuels such as hydrogen are still quite far from being commercially viable, improving the existing internal combustion engine is still an important priority. Traditional internal combustion engines use a camshaft to control valve timing. Since the camshaft is rigidly linked to the crankshaft, engineers can optimize the camshaft only for one particular speed torque combination. All

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10

Eriksson, Mikael, and Daniel Olovsson. "An Alternative Variable Valve Timing System for Heavy Duty Vehicles." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153.

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The ability to control engine valve timing has the potential to alter the engine performance over the entire operating range. The outcome of valve timing technology enables the possibility to increase efficiency, lowering emissions, increase engine torque, etc. One of the simplest ways to obtain a variable valve timing is to use cam phasers. The dynamics of a hydraulic cam phaser has been studied, three concepts with the purpose to control such an element has been developed using simulation driven product development. Focus have been on robustness, simplicity and implementation. A final concep

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11

Farrell, Laura-Lee Amelia Catherine. "Prosthetic Vein Valve: Delivery and In Vitro Evaluation." Thesis, Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-04042007-180135/.

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12

Muller, Matthew. "Modeling, design and control of forced-feedback metering poppet valve system." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4644.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 17, 2009) Includes bibliographical references.

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13

OLIVEIRA, PAULO GUILHERME OLIVEIRA DE. "RELIABILITY STUDY OF SUBSURFACE SAFETY VALVE CONTROL SYSTEM IN OIL WELLS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=27632@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Os desafios na construção de poços de petróleo vêm aumentando ao longo do tempo, seja pelo aumento das dificuldades técnicas devido à maior complexidade das áreas a serem desenvolvidas, sejam pelas melhorias nas regras dos órgãos reguladores visando aumentar a segurança. Existem dois pilares que devem nortear um projeto de um poço de petróleo: segurança e produtividade. O equipamento denominado dispositivo de segurança de sub-superfície e seu sistema de controle podem ser considerados importantes para os dois, pois caso o sistema falhe, obt

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14

Gharibeh, Lara. "Gata6 Haploinsufficiency Leads to Aortic Valve, Conduction System and Limbs Defects." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37584.

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Cardiovascular diseases are the leading cause of morbidity and mortality worldwide. Congenital heart disease (CHD) is a risk factor for premature cardiovascular complications. Great advances have occurred in the past years leading to the identification of several genes essential for proper cardiac formation such as GATA4/5/6 mutated in some individuals with CHD. GATA6 is a zinc finger transcription factor whose presence is crucial for early embryonic development. GATA6 is expressed in many cell types of the heart including myocardial, endocardial, neural crest, and vascular smooth muscle. In h

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15

Jackson, Philip Richard. "Optically-powered normally-closed fail-safe hydraulic valves." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288768.

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16

Mankame, Omkar V. "Hydrodynamic Assessment of a Porcine Small Intestinal Sub-Mucosa Bioscaffold Valve for Pediatric Mitral Valve Replacement." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3379.

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Valve replacement for critical heart valve diseases is in many cases not an option. Our clinical experience in pediatric compassionate care has shown robust function of porcine small intestinal submucosa (PSIS) valves. We assessed functional effectiveness of 4ply (~320µm) and 2ply (~166µm) PSIS mitral valves under pediatric-relevant hemodynamic pulsatile conditions. Key conclusions: (i)PSIS valves demonstrated statistically similar acute functionality in comparison to a commercially available valve. (ii)Energy losses were similar (p>0.05) under pediatric conditions which was not the case under

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17

KARAR, Mohamed Esmail Abdel Razek Hassan. "Development of a Surgical Assistance System for Guiding Transcatheter Aortic Valve Implantation." Doctoral thesis, Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-83426.

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Development of image-guided interventional systems is growing up rapidly in the recent years. These new systems become an essential part of the modern minimally invasive surgical procedures, especially for the cardiac surgery. Transcatheter aortic valve implantation (TAVI) is a recently developed surgical technique to treat severe aortic valve stenosis in elderly and high-risk patients. The placement of stented aortic valve prosthesis is crucial and typically performed under live 2D fluoroscopy guidance. To assist the placement of the prosthesis during the surgical procedure, a new fluoroscopy

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18

Eriksson, Elin. "CFD study of a pump trip in a pump-check valve system." Thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-122410.

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19

Zhai, Qiang. "A NUMERICAL STUDY OF A HEAT EXCHANGER SYSTEM WITH A BYPASS VALVE." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461252171.

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20

Besada, Joona. "A Virtual Heart Valve Implant System : Navigating the idea space and developing a proof of concept for virtual transcatheter aortic valve replacement." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168740.

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Aortic stenosis is a disease that causes a narrowing of the aortic valve opening. It is a disease that can be found in more than 2% of the elderly population. In the past, the only effective treatment has been open heart valve replacement, but in the last decade it has become possible to also treat aortic stenosis through a percutaneous procedure known as transcatheter aortic valve replacement. An implant-carrying catheter is led up to the patient’s heart where the implant is deployed. Sizing, positioning, and orientation of the implant are important considerations in transcatheter aortic valv

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21

Paterson, Alan Stanley. "The development of an expert system to facilitate the synthesis and analysis of hydraulic directional control valves." Thesis, De Montfort University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253485.

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22

Mumpower, Edward Lee. "Effect of disc angulation on the fluid dynamics of a tilting disc mitral valve prosthesis." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/32827.

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23

Kara, Kuni Sharsad. "Mathematical modelling and experimental investigation of multi-stage valve-less impedance pumping system." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/43530/.

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Impedance pumping is a simple valve-less pumping mechanism which offers a low energy, low noise alternative for conventional pumping at micro and macro scales. When a fluid-filled elastic tube is connected to rigid tanks, a net flow in either direction can be induced by periodically compressing the elastic section asymmetrically from the ends. The flow generated is due to the mismatch in acoustic impedance between the elastic and rigid regions. Prior works show a complex non-linear behaviour of the flow in response to the compression frequency, including distinct resonance peaks and reversals

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24

Fourie, Jecois. "Numerical optimisation of the gating system of a titanium alloy inlet valve casting." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1290.

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Dissertation submitted in fulfilment of the requirements for the degree Master of Technology: Mechanical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2014<br>The research described in this dissertation investigates the feasibility of casting inlet valves for an internal combustion engine using Ti6Al4V alloy. The engine valves operate in an extreme environment under high thermal cycles – this requires a material that can withstand such exposures. Ti6Al4V is the most common titanium alloy with high temperature creep and fatigue resistant behavi

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25

Kim, Hee Sun. "Nonlinear multi-scale anisotropic material and structural models for prosthetic and native aortic heart valves." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29671.

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Thesis (Ph.D)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Haj-Ali, Rami; Committee Member: White, Donald; Committee Member: Will, Kenneth; Committee Member: Yavari, Arash; Committee Member: Yoganathan, Ajit. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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26

Mok, Keng Wa. "Design and control of an electromechanical variable rotary valve system for four-stroke engines." Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b1942819.

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27

Hamberg, Robin. "Optimization of FreeValve´s fully variable valve control system for a four-cylinder engine." Thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215987.

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Automotive exhaust legislation is stricter than ever and manufacturers are spending increasing amounts of resources on reducing fuel consumption and emissions from their vehicles. What most do not try is to change one of the most fundamental concepts of the internal combustion engine. The camshaft is used to control the poppet valves in the gas exchange process and has, despite many variations, stayed more or less the same the last century. The largest disadvantage with the camshaft is that the optimum gas exchange process is dynamic with engine speed and load, where the camshaft is not. Varia

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28

Konduri, Suchitra. "The Influence of normal physiological forces on porcine aortic heart valves in a sterile ex-vivo pulsatile organ culture system." Thesis, Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-03042005-135623/unrestricted/konduri%5Fsuchitra%5F200505%5Fmast.pdf.

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Thesis (M. S.)--Chemical and Biomolecular Engineering, Georgia Institute of Technology, 2005.<br>Dr. Athanassios Sambanis, Committee Member ; Dr. Timothy M. Wick, Committee Member ; Dr. Ajit P.Yoganathan, Committee Chair. Includes bibliographical references.

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29

Fahlén, Daniel, and Ludvig Fri. "Modelling and Control of a Forklift’s Hydraulic Lowering Function." Thesis, Linköpings universitet, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139247.

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Material handling and logistics are fundamental parts of today’s global societyand forklifts are a crucial part of the material handling process. Making these asefficient and reliable as possible are therefore of great interest. In this master thesis, an effort has been made to improve the control of the hydraulic lowering function of a specific forklift. Today the lowering function iscontrolled through an open-loop control scheme making the control performancesensitive to disturbances and system changes. One disturbance of special interestis the temperature of the hydraulic fluid. The goal of

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30

Claiborne, Thomas Edward III. "Development and evaluation of a catheter deliverable artificial aortic heart valve prosthesis and delivery system." FIU Digital Commons, 2008. http://digitalcommons.fiu.edu/etd/2371.

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Currently, malfunctioning heart valves are replaced via highly invasive and costly open-heart procedures. A new alternative approach is a catheter deliverable or percutaneous heart valve. Current PHV prototypes utilize fixed animal tissue as valves. This research investigated the feasibility of an artificial PHV and the development of a delivery system. A left hea11 simulator and a tensile tester were used to characterize the hydrodynamics and mechanics of a novel artificial PHV. Test results showed equal or better in vitro hydrodynamic performance when compared to a St. Jude mechanical valve

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31

Schiller, 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.

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High-bandwidth fuel modulation is currently one of the most promising methods for active combustion control. To attenuate the large pressure oscillations in the combustion chamber, the fuel is pulsed so that the heat release rate fluctuations damp the pressure oscillations in the combustor. This thesis focuses on the development and implementation of a high-bandwidth, proportional modulation system for liquid-fuel active combustion control. The throttle valve modulation system, discussed in this thesis, uses a 500-um piezoelectric stack coupled with an off-the-shelf valve. After comparing th

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32

Sutherland, Erika Susanne. "Analysis of the performance and stability of a passive recirculation loop for hydrogen delivery to a PEM fuel cell system." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/443.

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Proton Exchange Membrane (PEM) fuel cells are becoming an increasingly important alternative to combustion engines as the fossil fuel reserves are depleted. Several papers have presented steady state analyses of the system, but few are known to present dynamic analysis of the flow and control of the hydrogen delivery process. This thesis presents the dynamic analysis of hydrogen delivery to a PEM fuel cell system. The hydrogen is delivered to the anode with use of an ejector for passive recirculation. The system to be studied consists of the manifolds, ejector, and pressure control valve. Mode

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33

Tugsal, Umut. "FAULT DIAGNOSIS OF ELECTRONIC FUEL CONTROL (EFC) VALVES VIA DYNAMIC PERFORMANCE TEST METHOD." ProQuest, 2009. http://hdl.handle.net/1805/2094.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Electronic Fuel Control (EFC) valve regulates fuel flow to the injector fuel supply line in the Cummins Pressure Time (PT) fuel system. The EFC system controls the fuel flow by means of a variable orifice that is electrically actuated. The supplier of the EFC valves inspects all parts before they are sent out. Their inspection test results provide a characteristic curve which shows the relationship between pressure and current provided to the EFC valve. This curve documents the steady state characteristics of the valve but does not a

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34

Grobler, Jacob Frederick. "Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves." Diss., University of Pretoria, 2005. http://hdl.handle.net/2263/66198.

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This study is focused on modifying an existing solenoid valve based semi-active hydropneumatic spring-damper system using Magneto-Rheological (MR) fluid. The MR fluid's effective viscosity can be altered by application of a magnetic field. Therefore, using a magnetic/ MR valve makes it possible to change the state of the system by simply changing the applied magnetic field. A prototype MR valve was developed to determine whether a unit small enough for installation was possible. This prototype valve was designed from first principles and properties such as pressure drop over the valve (damping

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MendonÃa, Doglasse Ernesto. "Osmosis reverse plant powered by photovoltaic modules with MPPT and self regulated pressure valve." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16455.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>This project presents a brackish water desalination plant via Reverse Osmosis (RO) powered by Photovoltaic Modules (PV) with Maximum Power Tracking (MPPT) and a self â regulating pressure valve. The developed unit is installed on Alternative Energy Laboratory (LEA), which is located on the campus of PICI at Federal University of CearÃ. To extract maximum power from the PV module a Buck type converter was developed for this application. The Incremental Conductance algorithms (IncCond) is used. The MPPT technique was simulated, tes

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36

Roberts, Andrew Philip. "Modelling and Experimental Investigation into the Performance of a Ball Valve from an Aircraft Fuel System." Thesis, University of Bath, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518099.

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The performance of an aircraft fuel system ball valve has been assessed using various modelling techniques and experimental methods. The performance largely splits into two parts. The first part deals with the steady state characteristics and internal flow field for fixed valve positions. The second part looks at the dynamic performance of pressure surge and flow overshoot by closing the valve using a linear profile. For the steady state flow, a 3D CFO model was used to characterize the flow coefficient to within 10% of the measured data. The variation of the flow coefficient with angle is lar

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Himsel, Frank Alexander. "Effects of manufacturing tolerances on high-speed mechanisms with application to a continuously variable valve train system." Thesis, Liverpool John Moores University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505939.

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LUISI, SABINO. "Analysis of the combustion characteristics of a spark ignition engine equipped with a variable valve actuation system." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2913617.

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Woo, Hyoungmin. "Development of Real-Time Predictive Analytics Tools for Small Water Distribution System." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504802657161527.

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Håkansson, Klas, and Mikael Johansson. "Modeling and Control of an Electro-Pneumatic Actuator System Using On/Off Valves." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8754.

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<p>To control the exhaust gas recirculation (EGR) and the exhaust brake, the position of a butterfly valve connected to a piston inside a pneumatic cylinder is controlled by altering the pressure inside the cylinder. This thesis evaluates the possibility to do this with pulse width modulation (PWM) controlled On/Off valves. The whole electro-pneumatic actuator system is built out of two On/Off valves and a cylinder.</p><p>A mathematical model of the system is constructed. The complete system model on state space form consists of nine states and is nonlinear. The model captures the dynamics of

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Schneider, Wolfgang. "Fully variable, simple and efficient - electrohydraulic - valve train for reciprocating engines." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71231.

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A new camless electrohydraulic valve train concept for combustion engines was developed at Empa (Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland) and tested on a spark ignition passenger car engine. Besides full flexibility with regard to lift and timing of the engine gas exchange valves it features robustness, simplicity and in particular a low own drive power need due to a maximum of hydraulic energy recuperation. The engine test results confirm substantial efficiency gains in classical as well as in hybrid power trains while also maintaining additiona

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Håkansson, Mikael. "Integration and optimization of a check valve design : A case study at Hydroware AB." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-99199.

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Constant product development for integration and optimization is a crucial part of companies today. With industrial components comes the challenge with how these parts can be integrated and optimized the best for the system. One example is a hydraulic elevator system, to integrate and optimize the design, the rest of the valve system has to be taken into consideration. This thesis contains the integration and optimization of a check valve solution designed with the help of the product development process in hopes of reducing costs for the manufacturing process for the company. The thesis resul

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Tsou, Ku-Hsiao, and 鄒谷孝. "Design of New Electromagnetic Valve System and Analysis of Valve Dynamics." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/cma23v.

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碩士<br>國立臺北科技大學<br>車輛工程系所<br>97<br>Conventional electromagnetic valves usually adopt double E-coil design. Valve action is actuated by the magnetic force from the coils in order to drive valve open or close. By this way it consumes large energy to keep valve at open or closed position. Therefore, the double E-coil design is replaced by permanent magnet in new electromagnetic valve to improve energy consumption effectively. This study is divided into three parts. The first part is to build new mathematic dynamic models for electromagnetic valve. These dynamic models include magnetic circuit sub

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Huang, Jian-Hau, and 黃健浩. "Design of a New Electromagnetic Valve System and Analysis of Valve Lash Dynamics." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/6tgxcs.

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碩士<br>國立臺北科技大學<br>車輛工程系所<br>96<br>It is acknowledged that variable valve timing (VVT) can effectively enhance engine performance and significantly reduce engine fuel consumption and exhaust emission. Application of electromagnetic valve (EMV) in SI engines can effectively improve the problems of fixed valve timings and events in conventional cam-valve engines. EMV engines have much higher flexibility in valve timing than conventional engines. Valve timings of EMV engines can have different settings to satisfy different engine operating conditions and different cylinder conditions. The main di

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Xie, Ju-Ming, and 謝居明. "The optimization of the valve production system using Flexsim simulation system." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/91346735765008497666.

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碩士<br>國立勤益科技大學<br>研發科技與資訊管理研究所<br>100<br>n recent years, in the globalized market competition, Taiwan's foundry industry is facing more intense challenge. The foundry is business is to build a flexible production system to meet the needs of customer orders and it will be the key to winning the industry. more often the Earliest Due Date scheduling are simple and convenient, but the disadvantage is lower in production, resulting in orders delay. In this study, through IDEF0 defined process, and use PEM to identify the most important goal to improve the factors that enhance efficiency and reduce

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Huang, Chang-Bin, and 黃昶斌. "Efficiency Analysis of Valve-less Dual Micropump System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/50148920210090882935.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>94<br>This study is to fabricate a valveless micropump by using PMMA materials, and the micropump uses piezoelectric disk to drive the fulid, and it uses diffuser/nozzle principle to get the flow rate. In diffuser/nozzle design, the micropump compares different length and angle with the other one. It may be seen that on the same angle the maximum flow rates of the different length single micropumps are the same, but the trend of the shorter length is smoother and sensitivity is lower near the maximum flow rate. On the different angles of 4.6°and 9.8°, it could be see

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Damen, Bas Stefaan. "Design, development and optimisation of a tissue culture vessel system for tissue engineering applications /." 2003. http://adt.lib.swin.edu.au/uploads/approved/adt-VSWT20040512.125051/public/01front.pdf.

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Thesis (MEng) - Industrial Research Institute Swinburne, Swinburne University of Technology, 2003.<br>Thesis submitted for the degree of Master of Engineering by Research, Industrial Research Institute Swinburne, Swinburne University of Technology, 2003. Typescript. Includes bibliographical references (p. 159-169).

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Chiang, Chi-Wen, and 江啟聞. "The design of throttleless hydraulic-controlled variable valve system." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/6ge397.

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碩士<br>國立臺北科技大學<br>車輛工程系所<br>99<br>To overcome the traditional scooter structure of intake valve system, this research designs the new structure, which valve lift is controlled by hydraulic pressure. The new structure has different valve lift, and traditional structure only has one valve lift. Therefore, this new design has multi-valve lift. In order to achieve effects on different valve lift, the hydraulic pump design is different than the pump out on the market. We can use the hydraulic pump to control the different amount of hydraulic oil by the coordination between column tube and colum

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Hsieh, Cheng-Chih, and 謝承志. "Study of Expansion Valve on Cascade Refrigeration System Performance." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/442s6p.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>102<br>The cascade refrigeration systems are widely applied in Taiwan, for use in air conditioning, refrigeration and food processing, pharmaceuticals, chemicals, machinery, etc. More attention recently, So this thesis refrigeration components easily available in the market to buy the dual refrigeration system developed for conducted to explore various expansion valve of the refrigerant flow. The system of high and low temperature circulation system individually in four A, B, C and D expansion valve testing, in order to best binary refrigerating system expans

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Hu, Hung-Li, and 胡宏利. "Design PDMS Hydrophobic Valve With Thermal Heater System Control." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/46276206946319869699.

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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>92<br>Abstract The study provides control methods , control systems and control software for microfluidic devices that operate by moving discrete microdroplets. The major purpose for this research is to simplify micro channel fabrication.In this research we use ICP(Inductively coupled plasma etcher) and PDMS (Polydimethy lsiloxane) to manufacture microchip which to reach production on large scale. For this purpose to reach Lab on chip we combine another function such as Electrophoresis and PCR even. We design electrics resistance to drive mi

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