Search results for "Automotive engineering"

showing 10 items of 483 documents

Model-based optimization of injection strategies for SI engine gas injectors

2014

A mathematical model for the prediction of the mass injected by a gaseous fuel solenoid injector for spark ignition (SI) engines has been realized and validated through experimental data by the authors in a recent work [1]. The gas injector has been studied with particular reference to the complex needle motion during the opening and closing phases. Such motion may significantly affect the amount of injected fuel. When the injector nozzle is fully open, the mass flow depends only on the upstream fluid pressure and temperature. This phenomenon creates a linear relationship between the injected fuel mass and the injection time (i.e. the duration of the injection pulse), thus enabling efficien…

Automotive engineElectronic control unitEngineeringbusiness.industryMechanical EngineeringMass flowInjectorSettore ING-IND/13 - Meccanica Applicata Alle MacchineAutomotive engineeringlaw.inventionIgnition systemSettore ING-IND/08 - Macchine A FluidoMechanics of MaterialslawLinearizationSpark-ignition engineGas injectorSpark ignition engineFuel efficiencyInjection strategybusinessSimulationJournal of Mechanical Science and Technology
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A New High-Efficiency Procedure for Aggregate Gradation Determination of the Railway Ballast by Means Image Recognition Method

2013

Abstract The mechanical characteristics of the railway superstructure are related to the properties of the ballast, and especially to the particle size distribution of its grains. Under the constant stress-strain of carriages, the ballast can deteriorate over time, and consequently it should properly be monitored for safety reasons. The equipment which currently monitors the railway superstructure (like the Italian diagnostic train Archimede) do not make any “quantitative” evaluation of the ballast. The aim of this paper is therefore to propose a new methodology for extracting railway ballast particle size distribution by means of the image processing technique. The procedure has been teste…

BallastRailway ballast Image analysis Segmentation techniques Aggregate gradation.EngineeringRailway lineAggregate (composite)business.industryAggregate gradationRailway ballastImage processingStructural engineeringAutomotive engineeringImage analysisSegmentation techniqueslcsh:TA1-2040Settore ICAR/04 - Strade Ferrovie Ed AeroportiGradationTrainbusinesslcsh:Engineering (General). Civil engineering (General)Civil and Structural EngineeringArchives of Civil Engineering
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Digital image analysis technique for measuring railway track defects and ballast gradation

2018

Abstract In order to guarantee safety and driving comfort and to maintain an efficient railway infrastructure, the first step is to carefully monitor the track geometry and wear level of the materials constituting the superstructure. To that end diagnostic trains are widely used on main lines, in that they can detect several geometric track parameters and rail wear, but under no circumstances they can yet detect ballast gradation. Due to the practical implications for the planning of maintenance operations on the railway network, this article presents a “DIP” digital image processing technique for measuring the transverse profile and corrugations of the rails as well as ballast gradation. T…

BallastStatistics and ProbabilityEngineering3304Aggregate gradationRail profile02 engineering and technologyRailway trackCondensed Matter PhysicTrack (rail transport)BallastAutomotive engineeringStereoscopic visionDigital image processing0202 electrical engineering electronic engineering information engineeringRail profileSettore ICAR/04 - Strade Ferrovie Ed AeroportiTrack geometryElectrical and Electronic EngineeringInstrumentationbusiness.industryApplied Mathematics020208 electrical & electronic engineeringStructural engineeringCondensed Matter PhysicsRail inspection020201 artificial intelligence & image processingGradationTrainImage analysibusiness
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Batteries for Aerospace: A Brief Review

2018

This paper presents a brief overview on batteries for aerospace application. In particular, More Electric Aircraft (MEA) and All Electric Aircraft (AEA) concepts are introduced at first, together with their main advantages and drawbacks. Subsequently, opportunities and issues related to the employment of batteries on aircrafts are presented and briefly discussed. Reference is then made to aircraft power system architectures and battery technologies, as well as on the state-of-the-art of battery management systems, state-of-charge and state-of-health estimations, and thermal management.

Battery (electricity)All electric aircraftEngineeringControl and Optimization020209 energyEnergy Engineering and Power TechnologyComputerApplications_COMPUTERSINOTHERSYSTEMS02 engineering and technologyThermal management of electronic devices and systemsSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciAutomotive engineeringBatterieBattery management systemsElectric power systemHardware_GENERALAdaptive system0202 electrical engineering electronic engineering information engineeringState-of-charge estimationState-of-health estimationAerospaceAerospaceBattery management systembusiness.industry021001 nanoscience & nanotechnologyMore electric aircraftComputer Networks and CommunicationAerospace electronicsElectric aircraft0210 nano-technologybusiness
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Simulation analysis of fuel cell integration in a hybrid car

2019

Abstract Fuel cell is one of the green technologies that can help reduce toxic gas and decreasing effect of greenhouse gases in the world. This paper attempts to improve simulation model of fuel cell system that is easy to use and at the same time have an acceptable accuracy. The simulation model is developed through Matlab/Simulink software using Energetic Macroscopic Representation method which accuracy is compared with an established model. Simulation analysis of fuel cell integration is conducted by using experimental data from a real hybrid car. There are two potential types of system that were considered for the hybrid car in term of electricity generation and power produced to move t…

Battery (electricity)Battery systembusiness.industryComputer science020209 energy020208 electrical & electronic engineering02 engineering and technologyHybrid car7. Clean energyAutomotive engineeringPower (physics)[SPI]Engineering Sciences [physics]Electricity generationSoftware13. Climate action0202 electrical engineering electronic engineering information engineeringFuel cellsbusinessMATLABcomputerComputingMilieux_MISCELLANEOUScomputer.programming_language
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Computer Fluid Dynamics Assessment of an Active Ventilated Façade Integrating Distributed MPPT and Battery

2019

Ventilated Façades integrated with photovoltaic panels have become a popular way to improve both the thermal-physical performances of the existing built environment. The increased usage of not-programmable renewable energy sources implies the adoption of energy storage systems to mitigate the mismatch between the power generation and the building’s demand. Aiming at properly integrates a photovoltaic panel and a battery (Lithium based) as a module of an active ventilated façade, the prototype design has been carried out in terms of thermo-fluid dynamics performance. Based on experimental setup, a numerical study of flow through the air cavity of the active ventilated façade has been carried…

Battery (electricity)Computer fluid dynamicsSettore ING-IND/11 - Fisica Tecnica AmbientaleComputer scienceGeneral EngineeringFacadeBIPV battery ventilated façade CFDMaximum power point trackingAutomotive engineeringTECNICA ITALIANA-Italian Journal of Engineering Science
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A Novel Energy Harvester for Powering Small UAVs: Performance Analysis, Model Validation and Flight Results

2019

The proposed work aims at exploring and developing new strategies to extend mission parameters (measured as travel distance and mission duration (MD)) of a new class of unmanned vehicles, named Micro Air Vehicles (MAVs). In this paper, a new analytical model, identifying all factors, which determine the MAV power consumption, is presented. Starting from the new model, the design of a nanoarray energy harvester, based on plasmonics nano-antenna technology is proposed. The preliminary study was based on a 22,066,058 22,066,058 &times

Battery (electricity)Computer scienceTerahertz radiation02 engineering and technologylcsh:Chemical technologyBiochemistryenergy harvesterSettore ING-INF/01 - ElettronicaEnergy harvesterAutomotive engineeringArticleAnalytical ChemistryModel validationnano-antennanano-antennasdipole rectenna array0202 electrical engineering electronic engineering information engineeringlcsh:TP1-1185Electrical and Electronic EngineeringInstrumentationPlasmonPower densityenergy harvester; MAV; power consumption model; nano-antennas; dipole rectenna array; perpetual flightWork (physics)perpetual flightpower consumption model020206 networking & telecommunications021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsRectenna0210 nano-technologyMAVEnergy (signal processing)
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VentQsys: Low-cost open IoT system for CO2 monitoring in classrooms

2021

AbstractIn educational context, a source of nuisance for students is carbon dioxide ($$CO_2$$ C O 2 ) concentration due to closed rooms and lack of ventilation or circulatory air. Also, in the pandemic context, ventilation in indoor environments has been proven as a good tool to control the COVID-19 infections. In this work, it is presented a low cost IoT-based open-hardware and open-software monitoring system to control ventilation, by measuring carbon dioxide ($$CO_2$$ C O 2 ), temperature and relative humidity. This system provides also support for automatic updating, auto-self calibration and adds some Cloud and Edge offloading of computational features for mapping functionalities. From…

Battery (electricity)Coronavirus disease 2019 (COVID-19)Computer Networks and CommunicationsComputer sciencebusiness.industryContext (language use)Cloud computingAire QualitatXarxes locals sense fil Wi-FiVentilacióDurabilityAutomotive engineeringlaw.inventionlawVentilation (architecture)Desenvolupament sostenibleEnhanced Data Rates for GSM EvolutionElectrical and Electronic EngineeringInternet of ThingsbusinessInformation Systems
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Recharge stations: A review

2016

Charging equipment for all-Electric Vehicles (EVs) is classified by the rate at which the batteries are charged. Charging times vary based on how depleted the battery is, how much energy it holds, the type of battery, and the type of Electric Vehicle Supply Equipment (EVSE). In this paper, a review of the innovative charging stations is reported.

Battery (electricity)EngineeringElectric vehiclesSustainability and the Environmentbusiness.industry020209 energy020208 electrical & electronic engineeringElectrical engineering02 engineering and technologyGroundwater rechargeElectric vehicleSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaCharging stationSettore ING-IND/31 - ElettrotecnicaAutomotive Engineering0202 electrical engineering electronic engineering information engineeringconnector typecharging stationRenewable Energycharging station; connector type; Electric vehicles; technologies; Renewable Energy Sustainability and the Environment; Automotive EngineeringbusinessElectric vehicle supply equipmentEnergy (signal processing)technologies2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)
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Numerical and experimental validation of a LiFePO<inf>4</inf> battery model at steady state and transient operations

2013

In the paper some of the battery models proposed in literature are analysed in order to predict the battery performance and, then, make sure that the Battery Management System (BMS) that is a key component to check and control the status of the batteries within their specified safe operating conditions, works in best conditions. In fact to reach an extended battery lifetime and increase the reliability of the system, is necessary to guarantee an accurate evaluation of the state of the whole stack of batteries to track their operations. Therefore, an accurate battery model that captures the dynamics of the battery is required. Lithium batteries are in particular considered because of their h…

Battery (electricity)EngineeringSteady state (electronics)business.industryEnergy storageAutomotive engineeringElectric power systemReliability (semiconductor)Hardware_GENERALDistributed generationComponent (UML)Electronic engineeringTransient (oscillation)business2013 Eighth International Conference and Exhibition on Ecological Vehicles and Renewable Energies (EVER)
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