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Showing 1 to 20 of 27 for “"Pistons"”.
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Lateral forces on hydraulic pistons caused by axial leakage flow
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1951.
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Fabrication et caractérisation de micro moteurs Stirling à pistons libres, pour la récupération d’énergie thermique à basse température
… le cadre de la mise en oeuvre de micromoteurs à pistons libres fonctionnant selon le cycle de Stirling, pour la valorisation d’énergie thermique à basse température (T< 200° C). Ce moteur prend une forme planaire, s’insérant entre une source et un puits de chaleur, pour fonctionner par la …
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The dual-piston jet injector and the viability of drug delivery
… injector enables the use of a cyclic motion of pistons to drive the injected fluids, as opposed to the one-piston design that requires resetting the mechanism. This provides a way to dispense high-volume doses of medication without reloading. In order to test the feasibility of using a …
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MEMS micropump for a Micro Gas Analyzer
… the structural deformations of the micropump pistons and tethers, and fluid-flow modeling tools characterizing the vacuum generation and pumping rates were developed. A systematic design procedure based on these tools enabled the design and prediction of different valve and pump layouts to …
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TRANSFORMING THE IMAGE OF BLACK MASCULINITY IN THE NBA: A RHETORICAL ANALYSIS OF THE NBA CARES PROGRAM
… Malice in the Palace brawl between the Detroit Pistons and the Indiana Pacers in 2004. The brawl violated the social contract between fans and players, necessitating the league to find a way to reestablish organizational legitimacy and redefine and preserve the brand of the NBA. Using Walter …
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Developement of Piezo-Hydraulic Actuation Systems Technology for use on a Helicopter Trailing Edge Flap
… to the first stage and uses differential area pistons to further amplify the output of the mechanical amplifier. The actuation systems force and displacement output is characterized based on frequency.
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ΘΕΩΡΗΤΙΚΗ ΚΑΙ ΠΕΙΡΑΜΑΤΙΚΗ ΕΡΕΥΝΑ ΤΗΣ ΜΟΝΙΜΗΣ ΚΑΙ ΜΕΤΑΒΑΤΙΚΗΣ ΛΕΙΤΟΥΡΓΙΑΣ ΤΟΥ ΚΙΝΗΤΗΡΑ ΝΤΗΖΕΛ ΜΕ ΣΤΡΑΓΓΑΛΙΣΜΟ ΤΗΣ ΕΞΑΓΩΓΗΣ
… COMPONENT TEMPERATURE FIELDS (CYLINDER, HEAD, PISTONS, EXHAUST VALUES).
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Diluted Operation of a Heavy-Duty Natural Gas Engine - Aiming at Improved Effciency, Emission and Maximum Load
… the combustion chambers with high turbulence pistons which enhances the combustion. By extending the dilution limit the gain in efficiency will be even higher. In summary the key features to improve the performance of a stoichiometrically operated natural gas engine are identified as: right …
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Miniature HCCI Engine Compressor
… engine compressor runs for up to 30 s. New pistons and cylinder liners with coatings did not improve reliability when implemented in the engine. The engine stalled because pressure could not be held in the cylinder due to blow-by leakage caused by too large of piston/cylinder clearance. The …
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Transfer lubrication techniques in a stick slip situation.
… and radially loaded by two diametrically opposed pistons pneumatically pressed against the disc circumference. A metal piston pressed against the metal disc induced the stick slip motion whilst the other piston consisted of a dry lubricant compact providing for the transfer of solid lubricant to …
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Two-stroke linear engine
… as the motion of the two horizontally opposed pistons is not externally constrained. A two-stroke engine prototype, with a bore of 36.5 mm and a maximum stroke of 50 mm, operating in a gasoline-fueled spark-ignited mode, was tested successfully under varying externally-applied load and ignition …
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Modeling of the cylinder boring process for prediction of cutting force, temperature and surface error
… performance and excessive wear of cylinders and pistons. Surface error arises from two causes, namely, the elastic deflection of the bore wall due to cutting forces and the thermal expansion of the cylinder bore during machining. The prediction of cutting forces is achieved through the …
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Micromechanistic analysis of fatigue in aluminium silicon casting alloys
… used in key LVD engine components, for example pistons, so that they are lighter and can operate at higher temperatures. Pistons are non-serviceable parts and so must be able to withstand the fatigue and high temperature environment of the car engine. It is therefore important to understand the …
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ARRAYS OF MILLIMETER-SCALE RUBBER COMBUSTION ENGINES
… chambers, quickly inflate thin elastomeric “pistons” outward, producing kHz-frequency actuations with >1 W stroke power outputs. We confirm repeatable oxy-fuel combustion using mixtures containing methane, propane, and butane. In array configurations, microfluidic fuel delivery networks …
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Novel pump for flow chemistry applications with increased reliability
… Some of these pumps use dual reciprocating pistons to drive the fluid, requiring the use of four check valves. This lowers the reliability of the pump as a whole to an undesirable level. A novel pump system design could operate without the need for any check valves. Operating three diaphragm …
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Achieving Efficient Control of Hydraulic Systems Using On/Off Valves
… is varied by changing the stroke length of the pistons as they are rotated. This method maintains high pressure on the same number of pistons, regardless of the power output, resulting in leakage and friction losses that do not decrease with the power output and a sharp drop in efficiency at low …
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Newspaper framing of indicted U.S. athletes: Evaluating orientation, prominence and proximity
… Basketball Association game between the Detroit Pistons and the Indiana Pacers.The Duke lacrosse case, as mentioned, has drawn some scholarly attention, but Lewis’ murder indictment and Artest’s assault charge have largely been forgotten, underreported and less researched. That justifies the …
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Design of an internally pressurized aerostatic journal bearing for thermoacoustic engines
… journal bearing for reciprocating free pistons was designed for application with thermoacoustic engines. By taking advantage of the maxima and minima of the oscillating pressures inside the engine's cavity, the bearing does not rely on external pressurization by a pump, but is internally …
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Relationship between the micromorphology and mechanical properties of semicrystalline polypropylene
… speed, hold pressure and oscillating patterns of pistons. The results obtained were compared so as to indicate the differences in microstructure and physical properties resulting from the two moulding techniques. A range of analytical methods were employed. Optical transmitted light microscopy was …
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New approaches to casting hypereutectic Al-Si alloys to achieve simultaneous refinement of primary silicon and modification of eutectic silicon
… light weight and high wear resistance, such as pistons, liner-less engine blocks and pumps. The wear resistance of this class of alloys is due to the presence of hard primary Si particles formed during casting. The objective of this work was to develop one or more methods of refining primary …
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