Relu Cherecheș


34-23 ANALIZA ASPECTELOR PRACTICE PRIVITOARE LA MANAGEMENTUL ENERGETIC ÎN CAZUL UNOR SIMPTOME SPECIFICE PENTRU SISTEMUL DE PORNIRE DE LA TOYOTA AVENSIS

ANALYZE OF THE PRACTICAL ASPECTS CONCERNING THE ENERGETIC MANAGEMENT IN THE CASE OF SPECIFIC SIMPTOMS FOR THE START
SYSTEM FROM TOYOTA AVENSIS
The present paper presents in known technical terms and methods from practical operations the problematic aspects concerning the energy supply to the start system from Toyota Avensis 1.6 MPI car. After a period of optimal functionality, the start system shows signs of bad operation and some symptoms occur which lead to the questioning of the electric energy management regarding the starting procedure. The worst situation is if the thermal engine suddenly stops in the street and after this there is no possibility to restart it in that moment. First the battery is replaced just to make sure there is enough energy supply. But the problem reappears. Analysing the power supply system allows us to get the insight of the procedure and also to develop a strategy in solving the problem by studying the specific symptoms. The present paper aims the goal of outlining the symptoms and problematic aspects related to the energy management in the start system of Toyota Avensis.
Keywords: electromotor, electricity, energy, power-supply, Toyota
Cuvinte cheie: demaror, electricitate, energie, încărcare, Toyota

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34-22 CERCETAREA EXPERIMENTALĂ A ASPECTELOR SEMIOZICE ALE GRUPULUI MOTOPROPULSOR DE LA OPEL ASTRA G

EXPERIMENTAL RESEARCH OF SEMIOZIC ASPECTS OF THE POWER-TRAIN SYSTEM FROM OPEL ASTRA G
The experimental research work presents the steps and important readings in diagnosis of the energy supply system of the 1.6 gasoline engine from Opel Astra G. Electrical systems are friendly to use and offer a high comfort when they work properly, but when are broken a lot of problems and discomfort appears. The present case consists in solving or discovering the main problem of the system because the engine will not start normally but very difficult. The analyzed car had some difficulties with the electric system (when turning on the engine), rotation would appear but no consistent working. Some faults were highlighted but ”engine starting” still was difficult to be done properly. The semiotic aspects were managed and the electrical system was closely scanned in order to perfectly define the errors.
Keywords: automotive, diagnostics, gasoline, Opel, supply
Cuvinte cheie: autovehicul, diagnosticare, benzină, Opel, încărcare

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34-21 CERCETAREA EXPERIMENTALĂ A EMISIEI DE CO2 ÎN RAPORT CU NIVELUL CONSUMULUI DE COMBUSTIBIL LA MOTORUL 1.3 DE LA AUTOMOBILUL SUZUKI SWIFT LA TEMPERATURĂ EXTERIOARĂ DE 0 °C

EXPERIMENTAL RESEARCH OF CO2 EMISSION IN RELATION WITH FUEL LEVEL AT 1.3 ENGINE FROM SUZUKI SWIFT AT 0 °C EXTERIOR TEMPERATURE
The present applied experimental paper determines, with the latest software equipment available online, the carbon dioxide emission level related to specific average fuel consumption (which depends on the accelerator pedal position) and driving conditions in real traffic on a usual road track between Cluj-Napoca and Alba Iulia. There are no particular studies related to this specific topic concerning the fuel consumption level and carbon dioxide emissions of the 1.3 dm3 engine from the Suzuki Swift. Nowadays are many similar vehicles in the small class on the roads in EU countries.
The fuel consumption control influences the carbon dioxide emission management with electronic online module regarding the carbon foot-print, energy efficiency and level of pollution. Analyzing the fuel specific consumption of the petrol engine from Suzuki Swift creates the opportunity to optimize carbon dioxide emissions, as well as other environmental controls. This experimental research is developed while testing the electronic management system regarding specific fuel consumption through engine control unit to acquire testing data. The actual values are recorded in different driving conditions, on average range.
Keywords: accelerator, consumption, motor, Suzuki, Swift
Cuvinte cheie: accelerator, consum, motor, Suzuki, Swift

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34-20 CERCETAREA EXPERIMENTALĂ A REPREZENTĂRII GRAFIC-DIGITALE LA BORD A MANAGEMENTULUI ECONOMICO-ENERGETIC PRIVITOR LA CONSUMUL DE HIDROCARBURI LA TOYOTA AVENSIS

EXPERIMENTAL RESEARCH OF THE ON-BOARD
GRAPHIC-DIGITAL REPRESENTATION OF ECONOMICAL-ENERGETICAL MANAGEMENT REGARDING THE HIDROCARBONS CONSUMPTION AT TOYOTA AVENSIS
The present paper shows in usual technical terms and specifications from practical testing the significant aspects concerning the consumption and energetic management from Toyota Avensis 1.6 MPI 2003 model year. After operating in mixt driving conditions both urban and extra-urban cycles the data was collected concerning the distance of travel, mileage, average fuel medium consumption and momentary fuel consumption.
Also was recorded even vehicle’s average traveling speed. Analysing the obtain and recorded data by the management system for fuel supply and from on-board graphical-digital display units and equipment there have been possible to determine even the carbon foot print by three distinct methods.
The tolerance between all three methods of carbon foot print determinations ranged from 1.5 % to approximately 60% due to the fact that the worst case scenario was calculated on the assumption all the fuel turned in CO2 (which is not a feasible idea).
Keywords: automotive, consumption, hydrocarbons, energy, on-board
Cuvinte cheie: automobilism, consum, hidrocarburi, energie, la bord

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34-19 CERCETAREA FACTORILOR CAUZALI DE UZURĂ ȘI A CARACTERISTICILOR ULEIULUI ÎN CAZUL ALIMENTĂRII CU BIOCOMBUSTIBILI A MOTOARELOR PENTRU MAȘINI AGRICOLE

RESEARCH OF WEAR CAUSING FACTORS AND LUBRICANT CHARACTERISTICS IN CASE OF BIO-FUEL SUPPLY TO THE AGRICULTURE MACHINE’S ENGINE
Lubricants and fuels are used in over a billion machines. All of them are used in different operating regimes. Because the viscosity and density of engine’s fluids are different in each case, operating conditions are significantly changed. This idea underlines the specific engine operating conditions when performing actual tasks in agriculture. The fuel-lubricant interaction study leads to solutions regarding the wear problem. Experiments show the problems and also the optimal solutions. Agricultural machine lubrication takes part in determining the reliability and durability. Biofuel-adds in commercial fuel is now common practice and an actual task on agricultural engineering is machines life span. Biodiesel may be used alone or in mixtures with other fuels, either fossil diesel or alternative solutions. The content of biodiesel in commercial fuels throughout the European Union is under 15 percent, but it is supposed to increase toward 20 percent. So, we have to analyse the influence that biodiesel has in lubrication and in component wear. In this study were developed experiments concerning the biofuel use and influence on lubricants in various situations, determined by complex analyse of available data from applied research. There were changes in carbon deposits and quality of lubrication. Biodiesel influenced the lubricant composition.
Keywords: agriculture, biodiesel, biofuel, engine, machine
Cuvinte cheie: agricultură, biodiesel, biocombustibil, motor, utilaj

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34-18 INTELIGENȚA ARTIFICIALĂ IMPLEMENTATĂ ÎN AUTOVEHICULE DE RALIURI PENTRU CREȘTEREA EFICIENȚEI ENERGETICE ÎN COMPETIȚII

ARTIFICIAL INTELIGENCE IMPLEMENTED IN RALLY VEHICLES PENTRU INCREASING ENERGETIC
EFFICIENCY IN COMPETITIONS
The present work summarized in a scientific paper presents the results of an applied research on specific aspects in the artificial intelligence and energy efficiency during real time measurements on a rally car. Energy management when injecting fuel in the engine and other significant parameters are monitored and recorded in a rally competition.
Close analyse of the injection duty, air temperature and barometric pressure, in different regimes, with computing and networking equipment coupled to the intelligent control module via cable connection. There are outlined the energy management operation and the main injection duty cycle, energy supply and the ignition timing of the rally car. Tests on the engine’s intelligent systems of the rally vehicle are made in the national rally competitions that are in the field of motor-sport. It is an entry level for artificial intelligence but operates properly with mechanical components.
The present paper shows the development of testing artificial intelligence related to the energy efficiency management and ignition timing systems and their correlation with other smart control checks in rally working conditions.
Keywords: artificial intelligence, energy efficiency, motor-sport, rally
Cuvinte cheie: inteligența artificială, eficiență energetică, motor-sport, raliu

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34-17 CERCETAREA POTENȚIALULUI ENERGETIC AL ACIZILOR GRAȘI DIN ULEIURI ȘI ALTE SURSE PENTRU APLICAȚIILE UTILITARE MODERNE

RESEARCH OF THE ENERGETIC POTENTIAL OF FATI
ACIDS FROM OILS AND OTHER SOURCES FOR
MODERN UTILITARY APPLICATIONS
The present research points out, in specific technical concepts and strategies from engineering expertise, the problematic aspects concerning the use of fatty acids as energy source in some cases when it is not indicated and even a bad idea. After analysing thoroughly Gary Yourofsky’s lectures and essays regarding his views on various important topics we have initiated a study concerning fatty acids as sources for energy. Having an expertise in industrial type of oils use we could expand the interdisciplinary study after considering Gary’s ideas in a cross referencing approach with results of Dr. John Mcdougall, Dr. Collin Campbell, Dr. Neal Barnard, Dr. Joel Kahn, Dr. Nick Delgado, Dr. Michael Klapper, Dr. Garth Davis, Dr. Caldwell Esselstyn, Dr. Michael Greger. The fatty acids are some of the most important sources of energy on our planet, especially when they are used as fuel for multiple existing thermal machines. In our laboratory we use oils for Diesel engines as fuel or as an insulator for energy convertors, as well as lubricant or as transmission fluid. By a chemical process of trans-esterification oils are transformed in biodiesel. Link between machinery use of fatty acids and human use as food is important to be considered. In this paper are synthesized some of the data acquired till this moment regarding the energy potential of fatty acids for modern applications. Between food use of oils and fuel for combustion processes, as well as insulator or hydraulic fluid, there is a lot of consideration to be made.
Keywords: energy, fatty acids, food, fuel, oils
Cuvinte cheie: energie, acizi grași, aliment, combustibil, ulei

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34-16 PROGRAME DE CALCUL – INSTRUMENT AUXILIAR ÎN ANALIZA ENERGETICĂ A INSTALATIILOR DE ARDERE

CALCULATION PROGRAMS – AUXILIARY TOOL IN ENERGY ANALYSIS OF COMBUSTION INSTALLATIONS
The purpose of this paper is to present two useful computer programs as an auxiliary tool for research and didactic activities. Input data for the Combustion program is the volumetric participations. The Enthalpy program displays graphic and tabular enthalpy depending on the temperature and the excess air coefficient.
Keywords: combustion, enthalpy of combustion gases, coefficient of excess air, the temperature of the combustion gases
Cuvinte cheie: ardere, entalpia gazelor de ardere, coeficientul excesului de aer, temperatura gazelor de ardere

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34-15 BIOGAZUL SURSĂ ALTERNATIVĂ DE ENERGIE

BIOGAS ALTERNATIVE SOURSCE OF ENERGY
The paper presents several aspects related to the production of biogas from vegetable demerara and sludge resulting in wastewater treatment plants. The history of biogas production, the legislation in force, as well as the principles of the biogas process are presented. At the end of the work there are several economic advantages and environmental protection by processing organic waste to obtain biogas.
Keywords: alternative sources of energy, obtaining and utilizing biogas
Cuvinte cheie: surse alternative de energie, obținerea și utilizarea biogazului

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34-14 ANALIZA PERFORMANŢELOR REALIZATE DE O CENTRALĂ FOTOVOLTAICĂ PENTRU O PERIOADĂ DETERMINATĂ DE TIMP

ANALYSIS OF A PHOTOVOLTAIC CENTER FOR
A PERIOD DETERMINED TIME
The paper describes the main methods to identify the parameters’
values over a time period for a photovoltaic plant, in order to highlight the
eventual equipment’s dysfunctions. For a real example of parameters
computation, there are made the following selections: the meteorological and
climatologic parameters are for a location from Romania, having latitude
44014’7”N and longitude 28033’19; the general characteristics of the apparatus
and equipment are selected from the providers catalogues; as the period of
time is selected a special period, June 2014 – May 2015, characterized by a
reduced sunlight, with consequently reduced solar radiation provided for the
photovoltaic collectors. For statistic computations there are utilized data
obtained from The National Institute of Meteorology (INM) for a period of 10
years.
Key words: photovoltaic plant, measurements, analysis
Cuvinte cheie:centrală fotovoltaică, măsurători, analiză

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34-13 CERCETĂRI EXPERIMENTALE PRIVIND RANDAMENTUL DE CONVERSIE LA UN CAPTATOR SOLAR SFERIC

EXPERIMENTAL RESEARCH ON SPHERICAL SOLAR
COLLECTOR EFFICIENCY
The paper aims to provide an experimental investigation on the performance of a spherical solar collector in comparison with flat plate collector. The experimental setup consists of a spherical solar collector having 0.7 m in diameter for the absorber surface and a flat plate solar collector with 1.75 m2 absorber surface. The effective absorber surface of the spherical collector considered in calculus was 50 % of the total spherical surface. An efficiency of 34% was obtained on the spherical collector. The flat plate solar collector proved to be more practical with 69 % efficiency.
Keywords: spherical solar collector, flat plate collector, solar energy
Cuvinte cheie: captator solar sferic, captator solar plan, energie solară

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34-12 ÎMBUNĂTĂȚIREA PERFORMANȚELOR TERMICE ALE COLECTORILOR SOLARI PLANI CU AER PRIN UTILIZAREA STRUCTURILOR TIP FAGURE

IMPROVEMENT OF THERMAL PERFORMANCE OF FLAT PLATE SOLAR COLLECTORS WITH PLAIN AIR BY USING HONEYCOMB STRUCTURES
The paper presents methods to improve the efficiency of solar collectors planning which reduce the losses caused by the transfer of heat radiative and convective between absorbent surface and environment.
Keywords: solar collector, radiation transfer, convective transfer, stagnation point, calotte fluid, energy efficiency
Cuvinte cheie: colector solar, transfer radiativ, transfer convectiv, punct de stagnare, fluid caloportor, randament energetic

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34-11 OBERVAŢII PRIVIND INFLUENȚA PUTERII ASUPRA GEOMETRIEI TURBINELOR DE VÂNT CU AX ORIZONTAL

NOTES ON THE INFLUENCE OF THE POWER ON THE
GEOMETRY OF HORIZONTAL AXIS WIND TURBINES
The paper analysis the influence of power of horizontal axis wind turbines
on the geometry of the blade of the turbine.
Keywords: wind turbines, power, geometry
Cuvinte cheie: turbine eoliene, putere, geometrie

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34-10 GENERATOARE CU MAGNEȚI PERMANENȚI PENTRU AGREGATE EOLIENE ȘI HIDRAULICE

PERMANENT MAGNETS GENERATORS FOR
WIND AND WATER PLANTS
This paper presents some particularities in the construction of synchronous generators for wind and hydro-plants and low power generators with permanent magnets with a simplified construction. Also, a comparison between variants of generators with electromagnetic excitation and permanent magnets is done.
The advantages of the use of supermagnete from rare earths, Neodim Iron Bor (NeFeB), especially the increase of the efficiency of these generators, are highlighted, and finally the maximization of efficiency is mentioned by replacing the conductive materials (copper, aluminium) with superconducting ceramic materials at ambient temperature.
Keywords: wind power, electrical generators, supermagnete
Cuvinte cheie: energie eoliană, generatoare electrice, supermagnet

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34-9 STUDIU PRIVIND REALIZAREA PRACTICĂ A UNUI AMPLIFICATOR AUDIO DE PUTERE – Partea a II-a

STUDY REGARDING THE SELF-CONSTRUCTION
OF AN AUDIO POWER AMPLIFIER – Part II
In this paper, beside the amplifiers concepts, the self-construction of the audio power amplifier (2 x 100 W) – UEMR, power amplifier with all its components (housing, supply block, tone corrector, mixing inputs, rectifier stage, preamplifier stages, output stages) respective the putting into operation, the advantages and disadvantages of the amplifier as well as the main conclusions are presented.
Cuvinte cheie: studiu, realizare practică, amplificator audio de putere
Keywords: study, self-construction, audio power amplifier

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34-8 STUDIU PRIVIND REALIZAREA PRACTICĂ A UNUI AMPLIFICATOR AUDIO DE PUTERE – Partea I

STUDY REGARDING THE SELF-CONSTRUCTION
OF AN AUDIO POWER AMPLIFIER – Part I
This paper presents a study regarding the self-construction of an audio power amplifier, where beside the theoretical part regarding the electronic devices and electronic circuits, the motivation of research was mentioned, some current and future trends in power amplifiers were describes respectively, the initial model of the studied amplifier as well the 3D modeling of the audio power amplifier (2 x 100 W) were presented.
Cuvinte cheie: studiu, realizare practică, amplificator audio de putere
Keywords: study, self-construction, audio power amplifier

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34-7 PRIZA DE PAMÂNT ARTIFICIALĂ PE CONTUR POLIGONAL ÎNCHIS LA INSTALAȚIA ELECTRICĂ PENTRU CONSTRUCȚIILE NOI

ARTIFICIAL GROUND CONNECTION ON CLOSED POLYGONAL CONTOUR AT THE ELECTRICAL INSTALLATION FOR NEW CONSTRUCTIONS
The resistance of ground connection depends on two important elements, namely the nature of the ground in which it is mounted and the method of installation.
Keywords: ground connection, horizontal electrode, strip form
Cuvinte cheie: priza de pământ, electrod orizontal, platbandă

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34-6 PIERDERILE PE LINIA DE ALIMENTARE A UNUI CONSUMATOR TRIFAZAT LEGAT ÎN TRIUNGHI

THE SUPPLY LINE LOSS OF A THREE-PHASE LOAD IN DELTA CONNECTION
The electrical power system usually operated in a symmetrical three-phase steady state mode. But, there are certain situations that can cause non-symmetrical operations. The presence of the unbalanced three-phased loads induce the apparition of the non-symmetrical systems involving currents and voltages as well the extra-loss within the supply wire. In this work we present a mathematical proof in Mathcad of additional losses in the electrical energy transmission line working under non-symmetrical conditions. Was considered a simplified model in delta connection, but the obtained result generalizes to complex electrical circuits. Finally, we show the conclusions and references.
Keywords: three-phase load, delta connection, active power, electrical energy transmission line, supply line loss, unbalanced functioning regime, mathematical proof in the Mathcad of additional losses under unbalanced conditions
Cuvinte cheie: receptor trifazat, conexiune în triunghi, putere activă, linie de transport a energiei electrice, pierderi pe linia de alimentare, regim dezechilibrat de funcţionare, demonstraţie matematică în mediul Mathcad a pierderilor suplimentare în regim dezechilibrat

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34-5 CONSIDERAȚII ASUPRA CALCULULUI TERMOTEHNIC AL UNEI CLĂDIRI ÎN VEDEREA ELABORĂRII CERTIFICATULUI ENERGETIC Partea a II-a

CONSIDERATIONS ON THERMOTHETICAL CALCULATION
OF A BUILDING FOR ELABORATION – ENERGY CERTIFICATE – II
In this paper some references are made to the thermo-technical calculation of residential buildings and apartments. Calculations also provide information on the total annual specific energy consumption for heating, lighting, hot water, ventilation, whereby the building falls into an energy class, and then measures are taken to improve the thermal energy performance of building.
Keywords: building, apartment, heat, electricity, thermal ventilation
Cuvinte cheie:clădire, apartament, căldură, electricitate, ventilație termică

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34-4 CONSIDERAȚII ASUPRA CALCULULUI TERMOTEHNIC AL UNEI CLĂDIRI ÎN VEDEREA ELABORĂRII CERTIFICATULUI ENERGETIC Partea I-a

CONSIDERATIONS ON THERMOTHETICAL CALCULATION
OF A BUILDING FOR ELABORATION – ENERGY CERTIFICATE – I
In this paper some references are made to the thermo-technical calculation of residential buildings and apartments. Calculations also provide information on the total annual specific energy consumption for heating, lighting, hot water, ventilation, whereby the building falls into an energy class, and then measures are taken to improve the thermal energy performance of building.
Keywords: building, apartment, heat, electricity, thermal ventilation
Cuvinte cheie:clădire, apartament, căldură, electricitate, ventilație termică

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34-3 CALCULUL PARAMETRILOR UNUI MOTOR DE INDUCȚIE LA DIFERITE VALORI ALE SARCINII, FOLOSIND PROGRAME DE TIPUL ”IND”

CALCULATION OF PARAMETERS OF AN INDUCTION MOTOR AT DIFFERENT VALUES OF LOAD, USING PROGRAMS SUCH AS „IND”
The paper presents IT and general aspects of how to calculate the parameters of an induction engine (MI) with „IND” type programs in the classic versions of Windows 2010/2015 and new modern versions, original Linux 2017/2018. The latest ones are based on native C language, with maximum compatibility and portability and, moreover, they are automatically plotting the features (MI); the equivalent executable binary code and global computing time are reduced (55 % and 99,99 %) including automatic graphic representation and export to 2 disk formats („.FIG” and MATLAB .png).
Keywords: induction machines, IND program, refurbishment, software, simulation modelling, MATLAB, Simulink, C, f2c, virtual machine
Cuvinte cheie: mașini de inducție, programul IND, retehnologizare, software, modelare simulare, MATLAB, Simulink, C, f2c, mașină virtuală

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34-2 ASPECTE IT PRIVIND MODUL DE CALCUL ȘI ANALIZĂ A PERFORMANȚELOR MAȘINILOR ELECTRICE DE INDUCȚIE UTILIZÂND PROGRAME DE TIP „IND”

IT ISSUES CONCERNING CALCULATION AND ANALYSIS
OF THE PERFORMANCE OF ELECTRICAL MACHINERY USING INDUCTION PROGRAMS ”IND”
The paper presents IT and general aspects of the optimal calculation and specific analysis of the performance of induction electric machines (MI) with IND programs in the classic versions of Windows 2010/2015 and new modern versions, original Linux 2017/2018. The latest ones are based on native C language, with maximum compatibility and portability and, moreover, they are automatically plotting the features (MI); the equivalent executable binary code and global computing time are reduced (with 55 % and 27 %) including automatic graphic representation and export to 2 disk formats („.FIG” and MATLAB ”.png”).
Keywords: induction machines, IND program, upgrading, software, simulation modelling, MATLAB, Simulink, FORTRAN’77, C
Cuvinte cheie: mașini de inducție, program IND, retehnologizare, software, modelare simulare, MATLAB, Simulink, FORTRAN’77, C

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34-1 ANALIZĂ EMPIRICĂ A IMPACTULUI FABRICAȚIEI CU SISTEME IOT ASUPRA INDUSTRY 4.0

EMPIRICAL ANALYSIS OF THE IMPACT OF MANUFACTURING WITH IOT SYSTEMS ON INDUSTRY 4.0
This paper presents a summary of the impact of manufacturing using IoT systems on Industry 4.0. They are theoretically presenting the programming model using JavaScript. The IoT concept should be used to facilitate the infrastructure, so every object must be represented on the Internet and interact with others. Communication within the network can take place between elements at the same conceptual level via an interface.
Keywords: IoT, fabrication, Petri networks
Cuvinte cheie: IoT, fabricatie, rețele Petri

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33-62 CERCETAREA IMPLEMENTĂRII LA BORDUL AUTOVEHICULELOR MERCEDES E CLASS COUPE A INFORMAȚIILOR ESENȚIALE PRIVITOARE LA ECONOMICITATEA DE COMBUSTIBIL ÎN EXPLOATARE

RESEARCHING THE IMPLEMENTATION AT ON-BOARD LEVEL OF MERCEDES E CLASS COUPE VEHICLES OF ESENTIAL INFORMATIONS CONCERNING
FUEL-ECONOMY IN OPERATION
The present scientific research develops a practical endeavor on the infotainment packages presented through graphical images and numerical data at on-board level in Mercedes E Class Coupe as a modern solution for vehicles. Analyzing the existing technological solution available on the upper level class of luxury cars may be facilitated improvement and optimization in the whole automotive sector.
Today automotive products are studied in order to improve their evolution and performance from state of the art to a better adapted version in the future production. That determines the designers and the researchers to combine all knowledge available in the science and data transfer.
The significance of researching the dash-board graphical representations is based on the necessity of adequate optimization of important data presentation and infotainment, which is handy for the occupants on board.
Keywords: Benz, dash-board, data, fuel economy, Mercedes E
Cuvinte cheie: Benz, bord, date, economie de combustibil, Mercedes E

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33-61 CERCETĂRI PRIVIND IMPACTUL VITEZEI DE CIRCULAȚIE ȘI A TRECERILOR DE PIETONI ASUPRA CONGENTIEI TRAFICULUI RUTIER. STUDIU DE CAZ B-DUL MIHAI VITEAZUL, SIBIU

RESEARCH ON THE IMPACT OF SPEED AND PEDESTRIAN CROSSING ON THE ROAD TRAFFIC CONGENTION. CASE STUDY- MIHAI VITEAZUL BVD, SIBIU
The speed is a significant constraint in terms of traffic, because it is directly related to safety, time, convenience and economical aspect for any type of road. Pedestrian crossings are a major concern for road safety as pedestrians are the most vulnerable road users, especially when they are involved in an accident. The paper aims to analyse the traffic velocity and queues on Mihai Viteazul Bvd., where, due to intensive traffic and the existence of ten crosswalks there are blockages and search solutions for improving circulation. The results of this analysis can be used by decision makers to optimize artery and design ideal pedestrian facilities.
Keywords: traffic volume, speed, pedestrian crossing, queues

Cuvinte cheie: volum trafic, viteză, trecere de pietoni, cozi de așteptare

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33-60 CONTRIBUȚII LA CERCETAREA ȘI DEZVOLTAREA EXPERIMENTALĂ A UNOR METODE AVANSATE DE ANALIZĂ ȘI RAPORTARE A EVENIMENTELOR RUTIERE

CONTRIBUTIONS TO EXPRIMENTAL RESEARCH AND DEVELOPMENT OF SOME ADVANCED METHODS FOR ANALYZE AND REPORT THE ROAD EVENTS
The experimental research and development work searches the significant factors, methods and materials in order to redefine the evaluation, analyze and reporting the car crashes and roads events. Thus in this present paper are considered few aspects of a particular road event that are analyzed with unconventional methods after the crash took place in order to improve on the report. The best way is that an accident never takes place but it is too idealistic due to the intricate structure of real traffic on public roads. So in order to improve the overall safety and awareness the prospective work shows some aspects that by analyze and automation could save time, energy and even life or protect health of living beings. The materials, methodology and result are able to be integrated in data bases and post-used for better understanding and redefining tools in real and virtual crash test technical inspection and analyze.
Keywords: accidents, Dacia Logan, events, road, research
Cuvinte cheie: accidente, Dacia Logan, evenimente, rutiere, cercetare

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33-59 CONTRIBUȚII LA STUDIUL PROCEDURILOR DE OMOLOGARE A UNUI AUTOVEHICUL ELECTRIC ÎN ERA TRANZIȚIEI

CONTRIBUTIONS TO THE PROCEDURE STUDY OF ELECTRIC VEHICLE HOMOLOGATION IN TRANSITION AGE
In the first stage the objective is to improve traffic and decrease noise and vibrations, but also meanwhile the technological megatrends have directed the research and development towards the grater energy efficiency, higher output, improved road safety and lower waste in human society.
To reach all these significant objectives in electric vehicle development it is mandatory to increase the number of clean and digital controlled systems in the urban area. In the near future stage (in space-time), electrical and smart cars will be fully operational and completelly developed for most common transportation tasks. The standards for type approval in various economies are studied in this paper. The actual research applied to the homologation procedure as well as the data obtained by collecting, centralizing and analyzing all found norms and regulations facilitated the developing of procedures. Homologation process is started as soon as car-development is finished and detailed.
A successful procedure is to be fulfilled when there is a type approval for each component, for each system or part or equipment or assembly before the whole vehicle is put to be type approved at RAROM. The present paper and the specific documents that are refered to in it, may nowadays be considered as a strong basis for developing and initiating the homologation procedure.
Keywords: automotive, electric, power-train, motor, vehicle
Cuvinte cheie: automobilism, electric, moto-propulsie, motor, vehicul

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33-58 STUDIUL NIVELULUI DE IMPLEMENTARE A STAȚIILOR DE ALIMENTARE CU ENERGIE ELECTRICĂ PENTRU AUTOVEHICULE RUTIERE ÎN ZONA METROPOLITANĂ CLUJ-NAPOCA

THE STUDY OF IMPLEMENTATION LEVEL OF ELECTRIC ENERGY SUPPLY STATIONS FOR AUTOMOTIVE VEHICLES IN METROPOLITAN AREA OF CLUJ-NAPOCA
The present study makes an analysis in the actual level of implementation and operating specs regarding the electrical energy supply stations for automotive fleet in the metropolitan area of Cluj-Napoca. Using all the available material in mentioned area were determined the places specifically built to allow vehicle charging. Also there were estimated the major players in the field at the present moment and for the next five years at least in the region. The importance of monitoring the electricity supply stations and the important players in the field at different levels consists in the fact that these vectors have a great influence on the technic-social movement and automotive marketing trend in the near future, which consequently will further determine the air pollution on one hand and road safety on the other hand. Further improvement and cloning of the electric energy supply stations for road e-vehicles are considered.
Keywords: electricity, energy, supply, stations, transport
Cuvinte cheie: electricitate, energie, furnizare, stații, transport

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33-57 STUDIUL EXPERIMENTAL AL POSIBILITĂȚII SPORIRII EFICIENȚEI ENERGETICE PRIN CONTROLUL FRECĂRII ÎN LAGĂRELE CU ROSTOGOLIRE ALE SISTEMULUI DE RULARE DE LA DACIA SOLENZA

EXPERIMENTAL STUDY OF THE POSSIBILITY OF INCREASING ENERGY EFICIENCY THROUGH THE CONTROL OF FRICTION IN ROLLER BEARINGS
OF THE WHEEL TRAIN FROM DACIA SOLENZA
The present study shows in known technical concepts and methods from experimental testing the problematic aspects concerning the friction in wheel train from Dacia Solenza 1.4 MPI car. After symptoms appearance with noises when cornering at some speeds the diagnostic procedure was applied and the wheel bearings with increased wear level were detected and changed. The worst case scenario is when the wheel bearing is so advanced in degradation than stops the wheel from turning leading to higher damages of the wheel train of the vehicle. Analysing the situation in the present case it was outlined that after some kilometres travelled in various conditions and monitoring the noise emission and type of vibration with decibel meter microphone and stethoscopes rear wheel has problems. The development of present paper shows the simplified procedure of replacing the wheel bearing on vehicle Dacia Solenza. First is a theoretical description of the problematic situation and there are located the wheel bearings in general terms and then there are presented the main components of the wheel train. Finally there is a short description of the simplified method for the wheel bearing exchange on the studied vehicle.
Keywords: Dacia, bearings, friction, efficiency, wheels
Cuvinte cheie: Dacia, rulmenți, frecare, randament, roți

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33-56 STUDIU APLICATIV ASUPRA ETAPELOR TEHNOLOGICE DE REPARARE ȘI ÎNLĂTURARE A UNOR ASPECTE SIMPTOMATICE ÎN CAZUL SISTEMULUI DE FRÂNARE HIDRAULIC DE LA DACIA SOLENZA

APPLIED STUDY ON TECHNOLOGICAL PHASES OF REPAIRING AND PRECLUDING OF SOME SIMPTOMATIC ASPECTS IN THE CASE OF HYDRAULIC BRAKING SYSTEM FROM DACIA SOLENZA
The present applied study highlights, in usual technical terms and strategies from practical expertize, the problematic aspects concerning the brake friction in operating surfaces of drum and brake shoes from Dacia Solenza. After a period of testing, inspecting and diagnosing the noise and operational behavior an applied endeavor was initiated. This was the initiating point for the present experimental study in order to manage the data and to record a contribution to practical experience. The braking system is one of the most important safety systems on the vehicle especially in relation with the steering system. Its performance and predictable operation is the basis of every safe journey and transports of material goods. Occasionally it is going not so well or as expected and during these periods of time it makes the ride unpleasant and unsafe. There is a know-how needed in order to preclude these problematic aspects in operation and to restore the safety level to acceptable. In this paper is synthesized the applied part of brake study and repair process in the case of Dacia Solenza.
Keywords: Dacia, brake, braking-shoes, brake-drum
Cuvinte cheie: Dacia, frână, saboți-frână, tambur

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33-55 STUDIUL VIBRAȚIILOR APĂRUTE LA COLOANA DE DIRECȚIE A UNUI AUTOVEHICUL ÎN PROCESUL FRÂNĂRII

STUDY OF THE VEHICLE STEERING COLUMN
VIBRATIONS IN THE PROCESS OF BRAKING
Noise, vibration and harshness are considered some of the biggest challenges that automotive engineers face in the industry and are one of the biggest customer warranty complaints. Automotive engineers work with the entire design team including materials, physicists and even electrical engineers to identify the location of noises within the braking system and find ways to eliminate vibration, reduce noise and friction.
Keywords: vibration, brake, harshness, road, vehicle
Cuvinte cheie: vibrații, frânare, disconfort, rutier, vehicul

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33-54 STUDIU ASUPRA UTILITZĂRII GIROSCOAPELOR CU MOMENT CONTROLAT PENTRU STABILIZAREA DINAMICII AUTOTURISMELOR

STUDY REGARDING THE USE OF CONTROL MOMENT GYROSCOPE FOR THE STABILIZATION OF AUTOMOTIVE DYNAMICS
The application of gyroscopes in the naval and aerospace sectors has gained momentum during the Second World War, bringing these hitherto relatively obscure devices to the technological forefront from the area of experimental physics. The main application in these areas are gyrocompasses and control moment gyroscopes (CMGs).
The CMG is a relatively efficient torque generator and is based on the gyroscopic principle from physics (mechanics). As such, they are used to counteract the roll and pitch of seagoing vessels, a CMG of 100kg being able to generate a control-torque in the order of thousands of Nm.
The aim of this paper is to examine the possible application of CMGs on road going vehicles in order to improve comfort and stability.
Keywords: gyroscope, automotive dynamics, CMG, stability and confort
Cuvinte cheie: giroscop, dinamica autovehiculelor, GMC, confort si stabilitate

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33-53 DETERMINAREA PE CALE ANALITICĂ A FRECVENȚELOR DE VIBRAȚIE NATURALĂ A UNEI JANTE ȘI CERCETĂRI ALE ASPECTELOR LEGATE DE INFLUENȚA ACESTORA ASUPRA INTEGRITĂȚII STRUCTURII

ANALYTICAL DETERMINATION OF
NATURAL FREQUENCIES VIBRATION OF A RIM AND RESEARCH ON THE ASPECTS OF THEIR INFLUENCE ON THE STRUCTURE INTEGRITY
This scientific and technical paper, outlines the studies made on vibrations aspects in correlation with exploitation of a wheel rim. Rims are critical components of the vehicle wheel. The wheel is a device that enables efficient movement of an object across a surface by rotating itself on that surface. To find the natural frequencies and stiffness a model is designed using commercial software SOLIDWORKS and the factors are estimated by commercial analysis software ANSYS Workbench. The present work deals with analysis of an aluminium alloy wheel rim subjected to vertical load, air pressure, damping factor and stiffness of material under various condition are found(different centrifugal speeds that coresponds to different speeds of vehicle).
Keywords: rim, vibration, vehicle, frequencies, resonance
Cuvinte cheie: jantă, vibrație, vehicul, rezonanță

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33-52 STUDII ȘI CERCETĂRI CU PRIVIRE LA INFLUENȚA PRESIUNII DIN PNEURILE UNUI AUTOVEHICUL ASUPRA STABILITĂȚII ACESTUIA ȘI A ZGOMOTULUI ÎN RULARE

STUDIES AND RESEARCH ON THE INFLUENCE OF PRESSURE IN A MOTOR VEHICLE’S TYRES ON ITS STABILITY AND ROLLING NOISE
This scientific paper aims to study the influence of inflation pressure on vehicle tires on maintaining good adhesion of vehicle wheels as it moves in turn. Effective monitoring of the vehicle’s behaviour in the winding process is done using a system composed of ultrasonic sensors and Arduino UNO Data Acquisition Plate, which provides data on longitudinal tilt of the vehicle during the tests. The research area in which this work can fall may be the discomfort caused to the driver of the vehicle and its occupants by the inclinations of the vehicle or the possible loss of adhesion suffered by the tires.
Keywords: discomfort, noise, vehicle, adhesion, safety
Cuvinte cheie: disconfort, zgomot, autovehicul, aderență, siguranță

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33-51 DETERMINAREA MIȘCĂRII CAROSERIEI UNUI AUTOVEHICUL ÎN TIMPUL EXPLOATĂRII PE DIFERITE TIPURI DE DRUM

DETERMINATION OF BODYWORK MOVEMENT OF A VEHICLE AT THE TIME OF EXPLOITATION ON DIFFERENT TYPES OF ROADS
In the course of the study, the body movements of a vehicle running on different types of road (ramp road, bumpy road, paved road with cubic stone) will be analyzed by designing a mathematical model of a motor vehicle using Matlab Simulink software.
Keywords: suspension system, body vehicle, types of roads, Matlab Simulink
Cuvinte cheie: suspensie, caroseria autovehiculului, tipuri de drum, Matlab Simulink

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33-50 ANALIZA PRIN ÎNCERCAREA RIGIDITĂȚII SUSPENSIEI CU ARCURI ELICOIDALE ȘI AMORTIZOARE HIDRAULICE ÎN CAZUL AUTOVEHICULULUI BMW E46 318D 115 CP 265 Nm LIMUZINA PE UN STAND CONTROLAT ELECTRONIC

ANALYZIS THROUGH TESTING OF SUSPENSION’S HARSHNESS WITH HELICAL SPRINGS AND HYDRAULIC DAMPERS IN THE CASE OF BMW E46 318D 115 HP 265 Nm LIMOUSINE MOTOR VEHICLE ON A ELECTRONICALLY CONTROLLED TEST BENCH
The present research work highlights the measurements made on suspension, vibrations and harshness aspects on BMW E46 318D vehicle limousine using an electronically controlled test bed. Many companies and laboratories seek pragmatically directed research in automotive fields and knowing such thing here is developed an experimental study on a real street car. In this case it is analyzed the behavior of suspension system concerning harshness, showing that the mass placement influences the suspension system behavior.
The problem of suspension influences is a serious one and the objective of the present study is to gain results and an insight of the oscillations damping process. The research methodology and specific objectives are oriented to bring the specific parameters and the research goal to open access.
Keywords: BMW 318d, harshness, suspension, vehicle, vibration
Cuvinte cheie: BMW 318d, rigiditate, suspensie, vehicul, vibrații

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33-49 STUDIUL INFLUENȚEI VOLANTEI CU MASĂ DUBLĂ ASUPRA REDUCERILOR VIBRAȚIILOR PRODUSE DE MOTOR

STUDIES OF THE INFLUENCE OF DUAL-MASS FLYWHEEL ON REDUCING THE VIBRATION OF THE ENGINE
Currently, engine designers have to downsize and down speed the engine in order to satisfy European requirements in terms of CO2 emissions. A simplified mathematical model (2 degrees of freedom) has been developed in order to show the positive effect of a Dual Mass Flywheel (DMF) on the powertrain. The model contains two rotational masses, torsional stiffness and damping properties. The engine torque variation is simplified by a sin function. The system is solved in Matlab using Runge-Kutta formula. The calculations were performed in three different rpm’s.
Keywords: harshness, noise, flywheel, vehicle, vibration
Cuvinte cheie: disconfort, zgomot, volantă, vehicul, vibrații

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33-48 CERCETAREA SEMIOTICĂ A TREPIDAȚIILOR/ VIBRAȚIILOR ȘI A MERSULUI RALANTI NEREGULAT LA OPEL ZAFIRA

SEMIOTIC RESEARCH OF VIBRATIONS AND
IRREGULAR IDLE RUNING SYSTEM
FROM OPEL ZAFIRA
The semiotic research paper searches the causal factors, sequences and significant symptoms in diagnosis process of the vibrations and engine irregular idle running in the case of Opel Zafira. The symptoms, after some instalments were made, consisted in irregularly running, low level vibrations and communication errors. The main objective of the present research is to determine the causal factor for all the recorded symptoms during the abnormal operation. The present paper searches to solve or to discover the only problem of the power-train system because the engine runs irregularly abnormal in idle speed and presents some vibrations. The result is related to procedures done at some point in time on the auxiliary systems.
Keywords: automotive, diagnostics, Opel, vibrations, Zafira
Cuvinte cheie: autovehicul, diagnosticare, Opel, vibrații, Zafira

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33-47 CERCETĂRI PRIVITOARE LA ÎNCERCAREA RIGIDI-TĂȚII SUSPENSIEI CU AMORTIZOARE HIDRAULICE ÎN CAZUL AUTOVEHICULULUI BMW E46 320D 150 CP 320Nm LIMUZINA PE UN STAND CONTROLAT DIGITAL

RESEARCHES CONCERNING THE SUSPENSION’S HARSHNESS TESTING WITH HYDRAULIC DAMPERS IN THE CASE OF BMW E46 320D 150 CP 320NM LIMOUSINE MOTOR VEHICLE ON A DIGITAL CONTROLLED BENCH
This research paper outlines the tests made on suspension, vibrations and harshness aspects in correlation with BMW E46 320D motor vehicle limousine on a digital controlled testing bench. Economic units and workshops look positively toward utilitarian directed research from applied modules and academic activities (especially in automotive fields). Thus is the case with the characteristics of suspension system’s harshness when comes to the motor vehicles, specifically the BMW. Taking the problem seriously the aim of the present research paper and the targeted system is suspension and its harshness when tested in a specialized workshop. The research method and specific objectives are directed to reach these specific goals and the study expectations from academic community.
Keywords: BMW, harshness, suspension, vehicle, vibration
Cuvinte cheie: BMW, rigiditate, suspensie, vehicul, vibrații

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33-46 STUDIUL VIBRAȚIILOR AUTOVEHICULELOR LA RULAREA PE UN DRUM DE PIATRĂ CUBICĂ CU DIFERITE PRESIUNI ÎN PNEURI

STUDIES AND RESEARCHES OF THE VIBRATIONS ASPECTS ABOUT DRIVING ON CUBIC STONE ROAD WITH DIFFERENT TYRE PRESSURE
This scientific and technical paper outlines the studies made on vibrations aspects in correlation with exploitation of road vehicles. Professional forums and providers look kindly upon pragmatically oriented science from experimental applications and modules content (in specialty disciplines from research zone), being the same case with the characteristics of Noise, Vibration and Harshness (NVH) of vehicles in EU. In present paper, the content is about vibrations aspects about driving on cubic stone road with different tyre pressures.
Keywords: harshness, noise, road, vehicle, vibration
Cuvinte cheie: disconfort, zgomot, rutier, vehicul, vibrații

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33-45 STUDIUL PRIVIND VIBRAȚIILE MOTORULUI ÎN RAPORT CU TURAȚIA ACESTUIA LA AUTOVECHICULE RUTIERE

STUDY ON ENGINE VIBRATIONS RELATIVE TO ENGINE ROTATIONAL SPEED OF ROAD VEHICLES
The main concern of this paper is the analysis of mechanical vibrations produced in the engine compartment relative to the rotational speed and if there is discomfort felt in the passenger compartment of a road vehicle. Looking at the present day, automotive industry is very concerned with creating more powerful vehicles, that consume low fuel and are cheaper, but did they look at the harshness aspect of their vehicles? Considering this context, the paper will look further into the harshness factor of road vehicles that are produced under the compromise of low fuel efficiency, low cost, small and accessible.
Keywords: harshness, noise, road, vehicle, vibration
Cuvinte cheie: disconfort, zgomot, rutier, vehicul, vibrații

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33-44 CERCETAREA TURBO-SUFLANTEI CU AJUTORUL TESTĂRII ASISTATE DE CALCULATOR ÎN VEDEREA EVIDENȚIERII PERFORMANȚELOR

RESEARCHING THE TURBO-CHARGER WITH THE
OF COMPUTER AIDED TESTING IN ORDER
TO OUTLINE ITS PERFORMANCES
The present paper shows in specific technical concepts and methods from engineering perspective the problematic aspects concerning the turbocharger construction, problems and operation. After presenting the schematic construction and operation a testing sequence it’s considered. Analyzing the boost-pressure in relation with driving speed, engine temperature, engine speed and other parameters it allows the observer to gain the mathematical correlation between different working conditions. The development of present study aims to the stage of understanding and proper interpretation of the symptoms and problematic aspects related to the turbocharger and gas dynamics on Dacia Logan k9k792 Diesel engine.
Keywords: automotive, consumption, hydrocarbons, energy, on-board
Cuvinte cheie: automobilism, consum, hidrocarburi, energie, la bord

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33-43 CERCETAREA EXPERIMENTALĂ A FUNCȚIONALITĂȚII SISTEMULUI ELECTRONIC DIESEL CONTROL (EDC) ÎN RAPORT CU SARCINA DE LA MOTORUL N47 DE LA AUTOMOBILUL BMW 320D (E90) LA TEMPERATURĂ ȘI TURAȚIE CONSTANTĂ

EXPERIMENTAL RESEARCH OF ELECTRONIC DIESEL CONTROL (EDC) SYSTEM OPERATION IN RELATION WITH N47 ENGINE LOAD FROM BMW 320D (E90) AUTOMOBILE
AT CONSTANT TEMPERATURE AND SPEED
The present experimental paper evaluates, with the latest applications in the field, the operational parameters regarding accelerator pedal position and voltage from its sensors. There are no studies related to this specific topic concerning the electronic diesel control and other operating parameters of the N47 engine in the BMW 320d known as model E90. Today are many similar vehicles on the roads in our country.
The load control influences the electronic diesel control module regarding the power, energy efficiency and pollution. Analysing the electronic control commands of the diesel engine from BMW offers a possibility to improve fuel economy, as well as other related performances.
This experimental research is conducted while testing the electronic accelerator through diesel control module to acquire practical data. The real values are recorded, on total range and then discussed upon.
Keywords: accelerator, BMW, Diesel Control, E90, N47
Cuvinte cheie: accelerator, BMW, Diesel Control, E90, N47

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33-42 CONTRIBUȚII LA CERCETAREA EXPERIMENTALĂ A SISTEMULUI DE FRÂNARE DE LA BMW SERIA 3

CONTRIBUTIONS TO EXPERIMENTAL RESEARCH OF BRAKING SYSTEM FROM BMW 3 SERIES
The present work makes an endeavor in the experimental testing procedures on the security and maximum forces developed by the braking system from BMW 3 series. Using the brake tester there were determined the maximum forces on each wheel of every axle in order to outline the braking efficiency. The importance for monitoring the braking forces at different wheels and axles consists in the effect that these forces have on the security of road travels and on the possibility of controlling their value. Further improvement of the testing considers the vehicle load.
Keywords: BMW, brakes, testing, safety, system
Cuvinte cheie: BMW, frâne, încercare, siguranță, sistem

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33-41 CERCETAREA EXPERIMENTALĂ PRIVIND DIAGNOSTICAREA MOTORULUI 1,0 i DE LA OPEL AGILA

EXPERIMENTAL RESEARCH CONCERNING
DIAGNOSIS OF 1.0 i ENGINE FROM OPEL AGILA
The research paper makes an endeavor in applied part of the protocol for testing oxygen sensor strategies in the auxiliary system of 1.0 i engine from Opel Agila. Spark ignited engines are more likely to be seen on the roads event in the following years due to their compact size and versatility. They are very appealing due to their simplicity and easy to use. They are also cheaper than diesel engines and less pollutant when it comes to evaluate particles and smoke. The studied vehicle had some problems with the oxygen sensor. It was replaced but ”check engine” light on-board still turns on. The problem was defined and the electrical circuit inspected and the fault terminated successfully.
Keywords: automotive, diagnostics, feed-back, oxygen, sensor
Cuvinte cheie: autovehicul, diagnosticare, buclă reacție, oxigen, senzor

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33-40 CONTRIBUTII LA DIAGNOSTICAREA MOTORULUI CU APRINDERE PRIN SCÂNTEIE DE 75 KW E36 DE LA BMW 316i

CONTRIBUTIONS TO DIAGNOSIS OF SPARK IGNITED ENGINE OF 75 KW E36 FROM BMW 316i
The present experimental research shows methods and engineering aspects concerning measuring the load signal and throttle valve operation in a diagnosis procedure for determining the problem of engine speed oscillation. Throttle valve potentiometer signal can be a proper technical data determined for operational diagnosis of the engine in some cases. That is why in this experimental paper it was experimentally determined in order to make a proper interpretation of the errors and technical problems which led to engine speed oscillation and incorrect operation. The motor vehicle was brought into the diagnosis laboratory and it was properly inspected for electric and electronic faults by using KTS and other digital equipment. In particular it was studied the oxygen sensor operation, the air mass flow meter and the throttle valve actuator (by measuring its voltage on the inherent potentiometer). The electrical schematic was also studied in order to locate the important components.
Keywords: automotive, BMW, consumption, diagnosis, on-board
Cuvinte cheie: automobilism, consum, diagnoză, la bord

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33-39 CONTRIBUȚII EXPERIMENTALE LA DIAGNOSTICAREA MOTORULUI 1,9 TDI DE LA VW VENTO

EXPERIMENTAL CONTRIBUTIONS TO DIAGNOSIS
OF 1.9 TDI ENGINE FROM VW VENTO
The present paper offers an experimental contribution to the research of methods and strategies concerning the fuel consumption and injected quantity in the case of 1.9 TDI engine from VW Vento. It is an opportunity to study and document some aspects regarding the fuel quantity injected and how it may be optimized in experimental conditions in order to reach lower specific consumption, improved engine energy efficiency and even lower pollution. In the present paper is shown that the small intervention on the fuel injection pump may offer a significant change in spray quantity and further more influencing the overall consumption and efficiency. Finally the engine was optimized and the fuel injected quantity correlated with the operating regime in order to improve operational efficiency.
Keywords: automobile, fuel, consumption, diagnostics, on-board
Cuvinte cheie: automobil, combustibil, consum, diagnosticare, la bord

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33-38 CONTRIBUȚII LA CERCETAREA EXPERIMENTALĂ A SIMPTOMELOR PROBLEMATICE ALE SISTEMULUI COMMON-RAIL DELPHI DE LA MOTORUL 1.5 DCI K9K792 DE LOGAN DACIA-RENAULT

CONTRIBUTIONS TO EXPERIMENTAL RESEARCH OF PROBLEMATIC SIMPTOMS OF THE COMMONRAIL DELPHI SYSTEM FROM THE 1.5 DCI K9K792 ENGINE OF DACIA-RENAULT LOGAN
The experimental research paper shows the elements and important values in applied study of the injection system testing in the case of 1.5 dCi engine from Dacia Logan. Compression ignited engines are more economically efficient due to their higher compression ratio and injection procedure. They are very attractive due to their fuel efficiency. They are also more expensive than gasoline engines and more pollutant concerning the particles and exhausted smoke. The monitored car had some problems with the injection system (control unit, high pressure pump and injectors). Some components were replaced but ”on-board light” still turns on from time to time indicating errors in injection assembly. The symptoms were grouped and the electrical circuit closely inspected and the faults were repeatedly identified.
Keywords: automobile, diagnostics, Delphi, diesel, injection
Cuvinte cheie: automobil, diagnosticare, Delphi, diesel, injecție

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33-37 CONTRIBUȚII LA CERCETAREA EXPERIMENTALA A SPECTRULUI TERMODISTRIBUȚIEI PE SISTEMELE AUXILIARE ALE MOTORULUI DE FORD 1.6 L IN LABORATORUL TESTECOCEL

CONTRIBUTIONS TO EXPERIMENTAL RESEARCH OF THERMODISTRIBUTION SPECTRUM ON THE AUXILIARY SYSTEMS OF THE FORD 1.6 L
ENGINE IN TESTECOCEL LABORATORY
The present work follows an endeavor in the experimental testing procedures on the thermal management and heat distribution spectrum in auxiliary systems of spark ignited engine from Ford. Using the thermal camera there were determined the peak temperatures on the engine and exhaust system. Main objective of the paper is to show by thermal vision how heat spectrum is covering the critical components. The importance of monitoring the thermo-distribution spectrum at different levels and components from auxiliary systems consists in the fact that the heat and peak temperatures have an influence on the performance and on the catalyst de-clogging. Further improvement of the measurements and testing are considered by implementing more bio-ethanol in fuel supply system.
Keywords: exhaust, Ford, testing, thermal-vision
Cuvinte cheie: evacuare, Ford, încercare, termo-viziune

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33-36 CONTRIBUȚII LA CERCETAREA PROCEDURII DE VERIFICARE A INJECTOARELOR COMMON-RAIL ÎN CAZUL MOTORULUI 1.8 TDCI DE LA FORD FOCUS

CONTRIBUTIONS TO THE RESEARCH OF INSPECTION PROCEDURE FOR THE COMMON-RAIL INJECTORS IN THE CASE OF 1.8 TDCI ENGINE FROM FORD FOCUS
The present research work develops a practical procedure of inspection sequence for the case of injectors and injection system as a whole to sketch the important steps required. Construction and operational analyze is also important as well as engine control parameters, main injection, temperature and symptomatic behavior, in specific conditions, but here it’s most highlighted the inspection procedure. By using injector monitoring equipment connected to the electronic control unit of the engine via digital interface. Thus are pointed out the fuel amount, fuel pressure and the injector behavior from the Ford Focus engine (1.8 TDCi Turnier/DNW/85.0 kW) with common-rail injection system. Significance and opportunity for inspecting the injectors from Ford Focus 1.8 TDCI is based on recurrence of the symptoms regarding power loss and engine problems in operation. Realizing the present paper leads to a goal of highlighting a problem related to the fuel system components as injectors from the common-rail compression ignited engine in particular working conditions.
Keywords: common-rail, Diesel, Ford-Focus, fuel, injection
Cuvinte cheie: common-rail, Diesel, Ford-Focus, motorină, injecție

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