The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform
Heunggeun Kim - One of the best experts on this subject based on the ideXlab platform.
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sensorless control of bldc motor drive for an Automotive Fuel pump using a hysteresis comparator
IEEE Transactions on Power Electronics, 2014Co-Authors: Taewon Chun, Quangvinh Tran, Honghee Lee, Heunggeun KimAbstract:This paper develops the brushless dc (BLDC) motor sensorless control system for an Automotive Fuel pump. The sensorless techniques that are based on a hysteresis comparator and a potential start-up method with a high starting torque are suggested. The hysteresis comparator is used to compensate for the phase delay of the back EMFs due to a low-pass filter (LPF) and also prevent multiple output transitions from noise or ripple in the terminal voltages. The rotor position is aligned at standstill for maximum starting torque without an additional sensor and any information of motor parameters. Also, the stator current can be easily adjusted by modulating the pulse width of the switching devices during alignment. Some experiments are implemented on a single chip DSP controller to demonstrate the feasibility of the suggested sensorless and start-up techniques.
Paulo J.s. Barbeira - One of the best experts on this subject based on the ideXlab platform.
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Voltammetric Determination of Chloride Ion in Automotive Fuel Ethanol
Electroanalysis, 2008Co-Authors: Heitor Breno Pereira Ferreira, Tatiana Aparecida Fernandes De Lima, Paulo J.s. BarbeiraAbstract:Cathodic stripping voltammetry with a hanging mercury drop electrode was used in this study to determine chloride ions in Automotive Fuel ethanol. Choosing the correct stripping voltammetric technique, the correct choice of deposition potential and time provided well defined voltammetric waves with good repeatability and relatively small errors, with a determination limit of 0.13 mg L−1, for only 10 s of deposition time, with better sensitivity and repeatability than the normalized method, as well as consumed less volume of the sample, being suitable for routine analysis.
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Conductometric determination of total acidity and chloride content in Automotive Fuel ethanol
Fuel, 2006Co-Authors: Heluza De Magalhães Avelar, Paulo J.s. BarbeiraAbstract:The use of conductometric titration in the determination of corrosive agents in Automotive Fuel ethanol has been studied. The methodology proposed is simple, fast, and sensitive and affords a larger repeatability and sensitivity in the analysis of total acidity and chloride content than the reference methods specified in the directives of ANP (National Petroleum Agency).
Domenico Acierno - One of the best experts on this subject based on the ideXlab platform.
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Recycling polyethylene from Automotive Fuel tanks
Journal of Applied Polymer Science, 2002Co-Authors: Giuliana Gorrasi, Luciano Di Maio, Vittoria Vittoria, Domenico AciernoAbstract:Polyethylene (PE) from postuse Automotive Fuel tanks is considered a valuable material for mechanical recycling, and we assessed its properties, paying particular attention to transport properties and processability. The characterization included the study of the sorption-desorption isotherms, the rheological analysis of the molten materials and their processability. In particular, we obtained, sorption-desorption isotherms using a model molecule (n-heptane) to simulate contact with the Fuel. The measurements were carried out on films of PE blend for tanks and separately on the components of the blend. Rotational rheometry was carried out on scraps from used tanks and on virgin material for comparison. We performed some extrusion tests to evaluate the possibility of mechanical recycling of the postuse materials. In particular, we examined the melt-fracture incoming conditions by making use of a twin-screw extruder with a round die. Stress-strain measurements were carried out on films of virgin and used material, obtained with a press on a laboratory scale to evaluate the change of the mechanical properties of a manufacture obtained by reprocessing a polymer aged in contact with a mixture of liquids.
Michael Wark - One of the best experts on this subject based on the ideXlab platform.
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challenges in Automotive Fuel cells recycling
Recycling, 2016Co-Authors: Rikka Wittstock, Alexandra Pehlken, Michael WarkAbstract:Fuel cell driven cars belong to the ‘zero emission’ vehicles and should contribute to lower CO2 emissions. However, they contain platinum, which is known as a critical material in the European Union. This study investigated the potential contribution of recycling Fuel cell vehicles (FCV) to satisfy the platinum demand arising from a widespread deployment of Fuel cell vehicles in Europe. Based on a qualitative examination of the four consecutive steps in the recycling chain (collection, dismantling, disassembly and pre-processing, material recovery) of Fuel cell vehicles, two recycling scenarios were developed. Using dynamic material flow analysis, these two recycling scenarios were applied to two scenarios for the market penetration of Fuel cell vehicles in nine European lead markets to deliver both the associated impact on platinum demand and the contribution of recycling for meeting this demand. The diffusion of FCV in Europe will not cause a depletion of platinum resources in the short term, as the calculated 537.06 t and 459.24 t in cumulative platinum requirements are far below the currently estimated global reserves. However, concerns regarding the future development of platinum supply and demand remain.
Nattapon Sukkapan - One of the best experts on this subject based on the ideXlab platform.
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Physico-mechanical properties and Automotive Fuel resistance of EPDM/ENR blends containing hybrid fillers
Journal of Polymer Research, 2016Co-Authors: Sarawut Prasertsri, Kanokwan Kurakanok, Nattapon SukkapanAbstract:This research aimed to investigate the effect of blend ratios on cure characteristics, mechanical and dynamic properties, morphology and Automotive Fuel resistance of ethylene-propylene diene rubber (EPDM) and epoxidized natural rubber (ENR) blends containing carbon black and calcium carbonate hybrid filler. The composition of EPDM/ENR blends varied were 100/0, 70/30, 50/50, 30/70 and 0/100 %wt/wt. All ingredients used for preparing each blended compound, except for the curatives, were mixed in a kneader. Thereafter, the compound was further mixed with curatives on a two-roll mill and then were vulcanized together with shaped by compression molding before determining cure characteristics, mechanical properties, morphology and weight swelling ratio in three Automotive Fuels; gasohol-91, diesel and engine oils. The results indicated that Mooney viscosity and cure time of EPDM/ENR blends tended to decrease with increasing ENR content, while cure rate index and crosslink density increased. Tensile strength of all EPDM/ENR blends is lower than that of the individual EPDM and ENR. This is attributed to the incompatibility between nonpolar and polar nature of EPDM and ENR, respectively, supporting by the glass transition temperature form dynamic mechanical thermal analysis (DMTA) and scanning electron micrographs (SEM). Owing to the differences in polarity of Automotive Fuels and rubbers, weight swelling of EPDM/ENR vulcanizates decreased in diesel and engine oils, but increased in gasohol-91 with increasing in ENR content.
