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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"ignition system"”.
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Engine instrumentation and data analysis for ignition system testing
The charge ignition system is used to ignite the fuel-air mixture in the combustion chamber of a spark ignited internal combustion engine and is the subject of many ongoing research projects. As a means to quantify the performance of an ignition system, a 16 horsepower Briggs and Stratton V-twin …
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The Simulation, Development, and Testing of a Staged Catalytic Microtube Ignition System
… that catalytic microtubes can be used to cause ignition of a bipropellant mixture in a rocket application and develops a unique ignition system as a low energy alternative or redundant ignition system as compared to current spark systems. Part I covers the experimental testing of a methane and …
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Simulation of microwave resonant field in an ICE cylinder for a potential microwave ignition system
… economic and environmental trends. A Microwave Ignition (MI) system would offer a new engine technology aimed at overcoming the more and more crucial environmental and natural resources. In such a MI system, a real-time controlled microwave resonance turns the air-fuel mixture into plasma and …
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The Effects of Increased Ignition Energy on Cold Start Hydrocarbon Emissions
A study on the effects of increased ignition energy on cold start hydrocarbon emissions was conducted. The tests were conducted on a single cylinder ASTM-CFR engine. The engine was outfitted with EFI, exhaust analyzers, and temperature probes. The engine was also modified to produce cold start …
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Laser ignition for internal combustion engines via fiber optic delivery
… the efficiency of Otto cycle engines, the ignition system is often a limiting factor. Many "high energy" ignition systems have been developed, but almost all of these are based on traditional electric arc spark plugs. Laser ignition represents a fundamentally different approach to igniting …
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Combustion optimization in a hydrogen-enhanced lean burn SI engine
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 …
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ΣΥΣΧΕΤΙΣΗ ΠΑΡΑΜΕΤΡΩΝ ΛΕΙΤΟΥΡΓΙΑΣ ΚΙΝΗΤΗΡΩΝ ΑΥΤΟΚΙΝΗΤΩΝ ΠΡΟΣ ΤΗΝ ΠΟΙΟΤΗΤΑ ΤΟΥ ΚΑΥΣΑΕΡΙΟΥ
… OPERATING CONDITION OF THE MIXTURE PREPARATION SYSTEM AND THE IGNITION SYSTEM OF A RANDOM SAMPLE OF FOUR HUNDRED IN USE VEHICLES IN ATHENS IS STUDIED. THIS ANALYSIS CAN BE USED TO INVESTIGATE THE INFLUENCE OF EACH PARAMETER AFFECTINGTHE ABOVE MENTIONED SYSTEMS ON EXHAUST EMISSION AND TO DEVELOP …
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Development of a high efficiency dilute gasoline engine
… Dilute Gasoline Engine (HEDGE) and control system for use in the Challenge X design competition encompasses the body of this work. The HEDGE concept embodies running an engine on gasoline at Diesel-like compression ratios. This is accomplished through extreme amounts of Exhaust Gas …
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Design of an automobile turbocharger gas turbine engine
… shaft. Designs for the combustion chamber, oil system, fuel system, and ignition system were created based on research of similar projects. Many of the necessary parts were also specified.
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Measurement of flame propagation through step changes in mixture composition
… but the Schlieren video showed that the laser ignition system induced a significant protrusion in the flame front. This protrusion smooths the transition from the flame speed of the inner mixture to that of the outer. Therefore, it was demonstrated that this setup is not suitable for the …
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MODIFICATION OF COMMERCIAL ROCKET MOTORS FOR TACTICAL APPLICATIONS
… The modifications include a novel head-end ignition system and a tailorable nozzle end cap designed to provide reliable at-altitude ignition by improving the transient behavior of the initial combustion chamber pressure rise. The nozzle cap also provides the additional benefit of extending …
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NO<sub>x</sub> reduction for natural gas engines with increased ignition energy and plasma jet ignitors
… ignitors was provided by a variable high energy ignition system, and each ignitor was supplied with 0.00, 0.08, 0.32, 0.72 and 1.28 Joules of energy in addition to that provided by the standard ignition coil. To differentiate between the benefits gained by use of the plasma jet ignitors and those …
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Autoignition and flame speed of premixed liquefied petroleum gas in a rapid compression machine: experimental results and reduced chemical kinetic mechanism
… and exhaust gas recirculation (EGR) on the autoignition and flame speeds of LPG/oxidizer/inert/EGR blends. Experiments were conducted with 100% propane and blends of propane with propene, ethane, isobutane, or n-butane. EGR was simulated with mixtures of Ar, CO2, CO, and NO at substitution …
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Development and testing of a solid core fiber optic delivery system and ultraviolet preionization for laser ignition
Laser ignition of natural gas engines has shown potential to improve many facets of engine performance including brake thermal efficiency, exhaust emissions, and durability as compared with traditional spark ignition. Laser ignition technology has yet to transition to industry primarily because no …
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Design, setup of an optically accessible internal combustion engine for study of gasoline direct injection combustion
… originally designed and used as a compression ignition engine for study of diesel combustion, but was extensively modified for GDI. The cylinder head was modified to include a spark plug, and a new ignition system was designed. In addition, a lowered compression ratio, new piston geometry, and …
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Design and Optimization of a Deflagration to Detonation Transition (DDT) Section
… achieve detonation either a high-energy, bulky, ignition system is required, or the combustion chamber must be fairly long (5 ft. or more in some cases). In the latter method, a subsonic flame front accelerates within the combustion chamber until it reaches supersonic speeds, thus detonation is …
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Investigation of the multi-physics of laser-induced ignition of transportation fuels
<p>Cleaner and more efficient combustion systems are expected to operate at conditions where successful spark ignition is difficult to achieve. Laser ignition is a proposed alternative ignition system capable of stable engine performance under these conditions. Fundamental studies are needed to …
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Improving the Efficiency of Gas Engines using Pre-chamber Ignition
… thesis focus on the application of pre-chamber ignition system in heavy duty natural gas engines, as a means to improve fuel efficiency and reduce NOx emissions. Initial experiments using pre-chamber spark plugs without auxiliary fueling showed improvements in combustion stability, but with only …
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Traversing hot jet ignition delay of hydrocarbon blends in a constant volume combustor
… as a rapid, distributed and moving source of ignition, traversing across one end of the long combustion chamber entrance, induces complex flow structures such as a train of counter rotating vortices that enhance turbulent mixing. In general, a stationary hot-jet ignition process lack these …