table of contentstable of contents
FISITA is an independent world body representing over 169,000 automotive engineers belonging to national automotive automotive societes in 35 countries. FISITA was founded in 1948 to provide a global forum for the exchange of technical knowledge on every aspect of vehicle design and manufacture. FISITA brings together engineers and decision-makers from industry, academia and government to work towards the improvement of transportation systems, the conservation of energy and the protection of the environment.
Www.fisita.com
Introduction a short presentation of CAR congress
The Scientific and Technical Committee
The Organizing Committee
Congress preliminary programme
Programme Synthesis
Technical Programme
Al D
avila T
heate
r, P
itesti
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2
The CAR International Congress is a traditional scientific event initiated by University of Pitesti in 1978.
thThis year, it's an anniversary edition, CAR being at its 10 edition.
str The 1 edition: 1978, June 6 – 8,
ndr The 2 edition: 1982, October 14 – 16,
rdr The 3 edition: 1985, October 17 – 19,thr The 4 edition: 1989, October 26 – 28,thr The 5 edition: 1992, November 5 – 7,thr The 6 edition: 1994, November 3 – 5,thr The 7 edition: 1997, November 6 - 8,thr The 8 edition: 2000, October 26 – 28,th
r The 9 edition: 2005, November 02 – 04.
Starting with 1997, the CAR Conference was organized under the high patronage of FISITA.
Generally speaking, the CAR Congress is an opportunity for delegates to:
- update skills and knowledge by attending focused
technical sessions
- gain insights into the automotive industry
- network with potential new partners, clients and suppliers
- view the latest technology products and services in the commercial
exhibition
CAR History
CAR2011THE INTERNATIONAL AUTOMOTIVE CONGRESSAUTOMOTIVE ENGINEERING AND ENVIRONMENT
2 – 4 November 2011, Pitesti, ROMANIA
THE INTERNATIONAL AUTOMOTIVE CONGRESS
THE INTERNATIONAL AUTOMOTIVE CONGRESS
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J.E. ROBERTSON – FISITA President
Gunter HOHL – EAEC President and vice-president of FISITA
Eugen Mihail NEGRUS – SIAR President
Jerome OLIVE – General Manager, DACIA – groupe RENAULT
Sorin BUSE – General Manager Renault Technologie Roumanie
Eric Riou – Le Moteur Moderne – France, member of AVL group
Constantin STROE – ACAROM President
Gheorghe DAVIDESCU – Prefect of Arges County
Tudor PENDIUC – Mayor of Pitesti City
Gheorghe BARBU – Rector of the University of Pitesti
The Congress Honorary Committee
The Congress Honorary Committee
The Congress Honorary Committee
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President of the Scientific and Technical Committee: Professor Nicolae PANDREA,University of Pitesti, member of the Romanian Technical Sciences Academy
The Scientific and Technical Committee
Rodica BARANESCU
Felix PFISTER
Felice E. CORCIONE
Dinu TARAZA
Michel FEIDT
Roger SIERENS
Emil MARINOV
Georges DESCOMBES
Pierre PODEVIN
Alain DELACROIX
Cedomir DUBOKA
Giovanni BELINGARDI
Ettore PENNESTRI
Berthold GRUNWALD
Velizara PENCHEVA
Abdelatif MIRAOUI
Reinhart VERSCHOORE
Society of Automotive Engineers, Former President,Truck and Engine Corporation, Chief EngineerU.S.A.
AVL GrazAustriaDr. eng.
Istituto Motori—CNR ITALYResearch ManagerDr. eng.
Wayne State University – U.S.A.Professor
Institut National Polytechnique de Lorraine et Université Henri PoincaréLaboratoire d'énergétique et de Mécanique théorique et appliquée – FranceProfessor
Ghent University,Department of Flow, Heat and Combustion Mechanics – Belgium,Professor
University of Russe – BulgariaProfessor, Dean of the Faculty of Transports
Conservatoire National des Arts et Métiers de Paris – FranceDirector of Laboratoire de Génie des Procédés pour l'Environnement, l'Energie et la Santé (LGP2ES), Equipe d'Accueil 21 (Ea21)
Conservatoire National des Arts et Métiers – FranceChaire de Turbomachines et Moteurs à Combustion Interne – FranceIngénieur de Recherche
Conservatoire National des Arts et Métiers de Paris – FranceProfessor
Yugoslav Society of Automotive Engineers, PresidentProfessor
Politecnico di Torino - ItalyProfessor, Department of Mechanics
University of Rome - ItalyProfessor
Technical University of Darmstadt - GermanyProfessor
University of Ruse “Angel Kanchev” - BulgaryProfessor
University of Ghent- BelgiumProfessor
University of Ghent- BelgiumProfessor
5Hristo STANCHEV
Velizara PENCHEVA
Miroslav DEMIC
Luis Le MOYNE
Ettore PENNESTRI
Jose Luis BENTO COELHO
Alexandre HERLEA
Ion VISA
Anghel CHIRU
Gheorghe A. RADU
Gheorghe CIOLAN
Cristian ANDREESCU
Mircea OPREAN
Nicolae APOSTOLESCU
Mihaela POPA
Radu GAIGINSKI
Nicolae BURNETE
Victor OTAT
Dumitru CRISTEA
Florian IVAN
Dan MARINESCU
Alexandru BOROIU
Stefan TABACU
Adrian CLENCI
University of Russe – BulgariaProfessor, Head of the Internal Combustion Engine Department
University of Russe, Department of Transport - BulgariaProfessor
University of Kragujevac - Serbia and MontenegroProfessor, Member of Engineering Academy of Serbia and Montenegro
Universite de Bourgogne, ProfessorDirecteur de l'Institut Superieur de l'Automobile et des Transports, Nevers, France
University of Rome Tor Vergata, Italy
Instituto Superior Tecnico, Lisboa - Portugal
Université de Technologie de Belfort-Montbéliard - FranceProfessor, Directeur Relations Internationales,
“Transilvania” University of Brasov - RomaniaProfessor, Rector
“Transilvania” University of Brasov - RomaniaProfessor, Dean of the Faculty of Mechanics
“Transilvania” University of Brasov - RomaniaProfessor
“Transilvania” University of Brasov - RomaniaProfessor, Head of the Automotive Department
University “Politehnica” of Bucharest - RomaniaProfessor, Head of the Automotive Department
University “Politehnica” of Bucharest, Automotive Department - RomaniaProfessor
Chief Editor of SIAR's Journal “Automotive Engineering” / Revista Ingineria Automobilului
University “Politehnica” of Bucharest - RomaniaProfessor
University “Politehnica” of Bucharest - RomaniaProfessor
Technical University of Cluj-Napoca - RomaniaProfessor, Head of the Automotive Department
University of Craiova - RomaniaProfessor
University of Pitesti, Automotive Department - RomaniaProfessor
University of Pitesti, Automotive Department - RomaniaProfessor
University of Pitesti, Automotive Department - RomaniaAssoc. professor
University of Pitesti, Automotive Department - RomaniaProfessor
University of Pitesti, Automotive Department - RomaniaAssoc. Professor
University of Pitesti, Automotive Department - RomaniaAssoc. ProfessorAssociated Researcher at CNAM Paris, FRANCELaboratoire de Génie des Procédés pour l'Environnement, l'Energie et la Santé (LGP2ES), Equipe d'Accueil 21 (Ea21)
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The Organizing Committee
EXECUTIVE ORGANIZING BOARD
Congress Chairman
Prof. Dr. Eng. Ion TABACU
Vice Rector - University of Pitesti
Congress Vice-Chairman
J.E. ROBERTSON
FISITA President
Scientific & Technical Committee
President
Acad. Prof. Dr. Eng. Nicolae PANDREA
Organizing Committee President
Prof. Dr. Eng. Viorel NICOLAE
Dean of Faculty of Mechanics and Technologie
University of Pitesti
Organizing Committee Vice President
Prof. Dr. Eng. Alexandru BOROIU
Head of Automotive Department
University of Pitesti
Logistics & Organisation President
Prof. Dr. Eng. Florian IVAN
Congress Coordinator
Assoc. Prof. Dr. Eng. Adrian CLENCI
Head of the Automotive and
Transportation Department
SIAR Executive Officer
Dr. Eng. Armand VLADU
MEMBERS
Prof. Dr. Eng. Tiberiu MACARIE
Prof. Dr. Eng. Ghiorghe CRIVAC
Prof. Dr. Eng. Dumitru CRISTEA
Prof. Dr. Eng. Radu RACOTA
Prof. Dr. Eng. Dinel POPA
Assoc. Prof. Dr. Eng. Dan MARINESCU
Assoc. Prof. Dr. Eng. Florin SERBAN
Assoc. Prof. Dr. Eng. Elena NEAGU
Assoc. Prof. Dr. Eng. Mariana IVANESCU
Assoc. Prof. Dr. Eng. Ionel VIERU
Assoc. Prof. Dr. Eng. Stefan TABACU
Assoc. Prof. Dr. Eng. Eduard NITU
Lecturer Dr. Eng. Rodica NICULESCU
Lecturer Dr. Eng. Catalin ZAHARIA
Lecturer Dr. Eng. Sorin ILIE
Lecturer Eng. Helene SUSTER
Lecturer Eng. Dumitru DRAGHICI
Eng. Elena DIACONESCU
STUDENT CONGRESS COMMITTEE
President
Prof. Dr. Eng. Alexandru BOROIU
Vice-presidents
Prof. Dr. Eng. Cornel COFARU
Prof. Dr. Eng. Ilie DUMITRU
Prof. Dr. Eng. Nicolae FILIP
Prof. Dr. Eng. Sorin IGRET
Prof. Dr. Eng. Daniel IOSZA
Prof. Dr. Eng. Laurentiu MANEA
Prof. Dr. Eng. Liviu MIHON
Prof. Dr. Eng. Adrian SACHELARIE
Congress programme-synthesis
programme-synthesis
stTUESDAY, 1 of November
ndWEDNESDAY, 2 of November
17h00 – Welcoming Cocktail
09h00 – 10h20: Opening at the RAMADA Hotel, Piteºti
2 – 4 November, 2011
Opening speech:r Organizers:
- FISITA Vice President – Brigadier ret. Prof. Günter Hohl- SIAR President – Professor Eugen NEGRUª- Rector of the University of Pitesti – Professor Gheorghe BARBU- General Manager of DACIA – groupe RENAULT - Mr. Jerome OLIVE- ACAROM President – Dr. Constantin STROE- RAR General Director – Sotir STANCU- Professor DHC Berthold GRUNWALD
r Local authorities:- Prefect of the Arges County – Mr. Gogu DAVIDESCU- Mayor of the Pitesti City – Mr. Tudor PENDIUC
10h20 – 10h30: Coffee break
10h30-12h45: Plenary Section:- Mr. Eric RIOU, Key Account Manager, Le Moteur Moderne – France,
member of AVL group, Automated Calibration for Transmission- Mr. Sorin BUSE, Director Renault Technologie Roumanie Future Mobility –
a general approach
Coffee break (15 min)
- Dr. Giovanni CIPOLA, Technical Director GM Powertrain EuropeThe Automobile Scenario in a Zero CO2 Future Environment
- Mr. Frank KOCINSKI– dSPACE, Mr. Daniel DRAGNE- Renault TechnologieRoumanie - Hardware In the Loop in the Automotive Industry
13h15-15h00: Lunch
15h30-18h30: Faculty of Mechanics and Technology (1, Tg. din Vale street, T Building, Pitesti)
- Simultaneous activities: Oral presentations on sections
19h30: Congress Dinner
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rdTHURSDAY, 3 of November
rdFRIDAY, 4 of November
08h30 – 13h00: Piteºti – Mioveni: the trip to DACIA – groupe RENAULT plant –
12h00 – 13h00: Lunch (at Dacia-Mioveni)
09h00 – 12h00: Technical Exhibition (for those persons staying in Pitesti, i.e. not being at Dacia)Faculty of Mechanics and Technology (Building T) – University of Pitesti
12h00 – 13h00: Lunch (at Pitesti)
13h00 – 13h30: Return to Pitesti city
14h00 – 18h15: Faculty of Mechanics and Technology(1, Tg. din Vale street, T Building, Pitesti)- Simultaneous activities: Oral presentations on sections
18h15 – 19h00: Meeting of the SIAR General Convention
19h30: Congress Gala Dinner
09h00 – 11h00
09h00 – 11h00
09h00 – 11h00
Effective Tripartite Collaboration - The Automotive Industry, Governments and Academia working towards a better Educational ExperienceChairman Professor: John FIELDHOUSE, University of Huddersfield, UK Keynote speakers:
Radu Mavrodin, Head of Human Ressources, Renault RomaniaViorel NICOLAE, Dean of Faculty of Mechanics and TechnologyAdrian CLENCI, Head of Automotive and Transportation Department
Forum on Future of automotive propulsion systemsChairman: Professor Dan MARINESCU, University of PitestiKeynote speaker:
Cristian Liviu POPESCU, Technical Synthesis Engineer, Renault Romania
Forum on Road injuries and car safetyChairman: Mrs. Livia NICOLAE - Head of Passive Security Department,Renault RomaniaKeynote speaker: Mr. Cristian NEVZOREANU - Corporate Affairs Director forRenault Technologie Roumanie, Road Safety domain pilot for Renault Romania
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programme-synthesis
09h00 – 11h00
09h00 – 11h00
09h00 – 11h00
Forum on Advantages of using modeling and numerical simulation in the design of the process by cold plastic deformation volumeChairman: Eduard NIÞU, Head of Manufacturing and Industrial Management
Department, University of Pitesti, Romania
Forum on Virtual factory - interface between university and industryChairman: Lecturer Daniel-Constantin Anghel, University of Pitesti, RomaniaKeynote speakers: Valentin STAN, Sales Representative, Magic Engineering SRL
Marius IVASCU, Head of Industrial Logistics, Automobile Dacia
Student forumChairman: Professor Alexandru BOROIU, University of Pitesti, Romania
12h00 – 12h30: Closing Ceremony
SOCIAL & TOURISTIC PROGRAMME
08h30 – 16h00:
Tourist visit:Pitesti – Curtea de Arges – Vidraru Lake - Casa Argeseana Log – Boat Travel on Vidraru Lake - Cumpana Log
9
DEFINITION OF EVALUATION CRITERIA FOR MOTOR VEHICLE'S
DRUM BRAKES CHARACTERISTICSGlišovic, Jasna, Demic, Miroslav, Miloradovic, Danijela
USING MOBILE DEVICES FOR ESTIMATING LONGITUDINAL
TYRES – ROAD FRICTION COEFFICIENTISPAS Nicolae, SOICA Adrian
STUDIES ON CAR BRAKESNicolae Vlad Burnete, Ioan Rus, Andrei Kiraly
DEVELOPMENT OF A SIMULATOR TO ALLOW THE HANDLING OF
A VEHICLE BY PUSHING A JOYSTICKNetto Arthur Vieira, Kassab Fuad, Contim Thiago Ragozo
ANALYSIS OF A CYLINDRICAL MAGNETORHEOLOGICAL FLUID
BRAKEPozniæ Aleksandar, Èasnji Ferenc, Stojiæ Boris
CAR2011_1109
CAR2011_1229
CAR2011_1293
CAR2011_1150
CAR2011_1124
15.00-16.25- Room T302
Chairman : Daniel IOSZA and Victor OÞÃT
CAR2011_1197
CAR2011_1192
CAR2011_1269
CAR2011_1156
CAR2011_1307
15.35-18.00- Room T302
Chairman : Ion PREDA and Tiberiu MACARIE
Wednesday, 2 November
Wednesday, 2 November
p r o g r a m m e
Road Vehicle - A11
Road Vehicle - A12
NUMERICAL SIMULATIONS OF THE MECHANICAL VIBRATIONS FOR A CAR SUSPENSION ASSEMBLYBogdan Mihaela-Liana, Otat Victor, Bolcu Dumitru
VEHICLE RIDE COMFORT ASSESSMENT METHODSDemiæ Miroslav, Lukiæ Jovanka, Glišoviæ Jasna
STABILITY OF A QUARTER AUTOMOTIVE WITH NONLINEAR QUADRATIC SUSPENSIONStãnescu Nicolae–Doru, Vieru Ionel
TEST-CALCULATION CORRELATION OF AN ENGINE IN THE AUTOMOTIVE INDUSTRY Gabriel-Petru Anton, Ioana Petcu, Fabien Sorel
ON THE STABILITY PROPERTIES OF A MID CLASS CARBogdan NICOLESCU, Tiberiu MACARIE, Florin SERBAN, Tudor PETRESCU
10
14.00-15.15- Room T302
Chairman : Ticuºor CIOBOTARU and Ion TABACU
INNOVATIVE SOLUTIONS REGARDING VEHICLE STEERING SYSTEMS – FOUR WHEEL STEERINGMarinescu Gabriel, Cãtãlin, Oþãt, Oana Victoria, Oþãt, Victor
CONSIDERATIONS ON POWER FLOW CIRCULATION WHEN MOVING WITH A 4X4 VEHICLE THAT RECORDS DIFFERENCES IN THE WHEELS' ROLLING RADII Truþã Marian, Costache Dragoº, Marinescu Marin, Vînturiº Valentin, Mitrea Minu
ISSUES OF SELF GENERATED TORQUE WITHIN THE 4WD DRIVETRAINMARINESCU Marin, VILÃU Radu
SEMI-RIGID REAR AXLE WITH H-SHAPE PULLED BEAM: MODERN CONSTRUCTIONS, TECHNOLOGIES, MODELINGMateescu Viorel, Iozsa Daniel, Chira Stefan
MODELLING AND SIMULATION OF STEERING TIE RODSMarinescu Gabriel Cãtãlin, Oþãt Oana Victoria, Oþãt Victor
Chairman : Cristian ANDREESCUMiroslav DEMIC and
15.30-16.45- Room T302
FLOW SIMULATION AROUND A GENERIC VEHICLE BODY ON WHEELSHuminic Angel, Huminic Gabriela
STUDY CONCERNING THE INFLUENCE OVER AERODYNAMICS PARAMETERSIozsa Daniel, Stan Cornelia, Nastase Alexandru
THE DEVELOPMENT OF THE SIMULATION METHOD THAT CAN PREDICT THE VIBRATION AS SOURCE OF INTERIOR NOISE FROM THE PARKING SYSTEM OF AUTOMATIC TRANSMISSIONKwon Byunghee, Changhyun Kim, Hyungsoo Hur, Eunho Kim, Kobayashi Tadao, Shinmyou Masahiro
THE EVALUATION OF THE AIR VELOCITY FROM THE VENTS EXIT INSIDE THE AUTOMOTIVENeacsu Catalin, Ivanescu Mariana, Tabacu Ion
AUTOMATIC GEARBOX TESTBED DESIGNED FOR OPTIMIZATION TESTING AND DEVELOPMENTBogdan Varga, Nicolae Burnete, Karamousantas Dimitrios, Nour Crisan, Vlad Nicolae, Dan Moldovanu
CAR2011_1198
CAR2011_1117
CAR2011_1120
CAR2011_1228
CAR2011_1199
CAR2011_1213
CAR2011_1237
CAR2011_1111
CAR2011_1261
CAR2011_1297
CAR2011_1307
Road Vehicle - A21
p r o g r a m m eThursday, 3 November
Wednesday, 2 November
Road Vehicle – A21
11
Chairman : Anghel CHIRU and Gheorghe CIOLAN
15.00-16.25- Room T303
CAR2011_1114
CAR2011_1154
CAR2011_1115
CAR2011_1116
CAR2011_1236
SIMPLIFIED MODEL FOR EPICYCLIC GEAR INERTIAL ARACTERISTICSCiobotaru Ticusor, Feraru Octavian, Caravan Alexandru
ASPECTS OF 3D MODELING AND MODAL ANALYSIS FOR A WIRE ROPE ISOLATORBuzea Daniel, Soimaru Cristian, Atanasiu Catalin, Iakab-Peter Marton
TORQUE CONVERTER MODELLING FOR ACCELERATION SIMULATIONCiobotaru Ticusor, Vînturis Valentin, Caravan Alexandru
THE MODELLING AND SIMULATION OF THE MILITARY TRACKED VEHICLES CROSSING OBSTACLES CAPABILITYVînturis Valentin, Ciobotaru, Ticusor Grigore, Lucian Fieraru, Octavian
DYNAMIC MODEL FOR THE PULL-BELT CVT SIMULATIONPreda Ion, Ciolan Gheorghe, Cristea Dumitru, Diaconescu, Eugen
STUDY REGARDING THE STATISTICAL MODELLING OF THE URBAN TRAFFIC FLOWSTimar Janos, Stanciu Mariana, Cofaru Corneliu, Florea Daniela, Chiru Anghel, Covaciu Dinu
TRAFFIC COUNTS METHODOLOGIES FOR VARIOUS TYPE OF ROAD TRAFFIC APPLICATIONSFlorea Daniela, Covaciu Dinu, Preda Ion, Timar Janos
ECOLOGICAL TRANSPORTATION TECHNOLOGIESBenea Bogdan Cornel, Chircan Eliza
EVALUATION OF THE PASSENGER TRANSPORT DEMAND IN THE AREA PITEªTI – VEDEA BY USING GRAVITATIONAL MODELBoroiu Alexandru, Nicolae Viorel, Ilie Sorin, Mitran Gabriela, Ghiold Ion, Boroiu Alexandru Andrei
MOBILITY STUDY TO INCREASE THE EFFICIENCY OF THE TRANSPORT OF PERSONS IN DOLJ COUNTYConstantinescu Augustin, Trotea Mario, Simniceanu Loreta, Ilie Sorin
CAR2011_1131
CAR2011_1159
CAR2011_1186
CAR2011_1276
CAR2011_1240
17.00-18.15- Room T302
Chairman : Elena NEAGU and Nicolae ISPAS
Road Traffic – T23
Road Vehicle – A11bis
p r o g r a m m eThursday, 3 November
Wednesday, 2 November
12
Chairman : Gheorghe Alexandru RADU and Mircea OPREAN
Chairman :Giovanni BELINGARDI and ªtefan TABACU
THE IMPACT OF THE VALVE VARIABLE TIMING UPON THE PUMPING WORK IN THE INTERNAL COMBUSTION ENGINESandu Gabriel, Cofaru Corneliu, Cosgarea Radu, Jelenschi Liviu, Aleonte Mihai
THE NECESSITY FOR ROTATIONAL MOVEMENT OF VALVE AND TAPPET IN INTERNAL COMBUSTION ENGINESJelenschi Liviu, Cofaru Corneliu, Sandu Gabriel, Radu Ioan-Serban, Aleonte Mihai, Cosgarea Radu
A KINEMATIC STUDY OF A MECHANICAL VARIABLE VALVE TIMING MECHANISM WITH CONTINUOUS VALVE LIFTMihalcea Stelian, Dumitrescu Vasile, Pandrea Nicolae
DESIGNING EXPERIMENT FOR ELECTRO-HYDRAULIC VALVESªoimaru Cristian, Buzea Daniel, Coldea Mihaela, Atanasiu Catalin
THE INFLUENCE OF CAMS EXTERNAL GROOVE IN CAM-FOLLOWER MECHANISM FUNCTIONINGPopa Dinel
THE SIMULATION OF THE MAIN MOVEMENTS OF THE HUMAN NECK USED FOR VIRTUAL IMPACT TESTING STUDIESCiunel Stefanita, Popa Dragos, Campian Vasile
NUMERICAL AND EXPERIMENTAL RESULTS ON PEDESTRIAN HEAD IMPACT TESTS ON AN ALUMINIUM BONNETAvalle Massimiliano, Bianciotto Katia, Belingardi Giovanni, Casu Antonio, Chiandussi Giorgio, Scattina Alessandro
WAYS TO DETERMINE THE VELOCITY OF TWO VEHICLES THAT ARE IN COLLISION, BASED ON RESTITUTION COEFFICIENTBodor Lucian Anton Bodor, Lucian Anton, Gaiginschi Radu
RESEARCH ABOUT INFLUENCE OF VEHICLE'S BUMPER POSITION UPON ADULT PEDESTRIAN HEAD INJURIESSoica Adrian, Ispas Nicolae
RESEARCH ON THE OCCUPANT'S BEHAVIOUR DURING THE PRE-CRASH PHASEVirgil Popa, Horia Beles
CAR2011_1189
CAR2011_1104
CAR2011_1211
CAR2011_1210
CAR2011_1108
Valve Actuation Mechanisms – Va1223
Passive Safety – Ps21
16.35-18.00 Room T303
14.00-15.00 Room T303
CAR2011_1130
CAR2011_1123
CAR2011_1207
CAR2011_1141
CAR2011_1272
p r o g r a m m eWednesday, 2 November
Thursday, 3 November
13
Chairman : Georges DESCOMBES and Cyril COUDERC
17.00-18.15- Room T303
CAR2011_1107
CAR2011_1118
CAR2011_1275
CAR2011_1303
CAR2011_1203
DIAGNOSTICS OF SEQUENTIAL SYSTEMS FOR GAS ON MOTOR VEHICLESMilovanoviæ Milan, Demiæ Miroslav, Jovanoviæ Saša, Popoviæ Milka
HEAT RECOVERY SYSTEMS FOR PASSENGERS VEHICLESYulia GLAVATSKAYA, Gérard OLIVIER, Osoko Fredy SHONDA, Pierre PODEVIN
FLOW SIMULATION IN ENGINE CYLINDER WHEN A COMBUSTIBLE SUBSTANCE (DEE) IS INJECTED INTO A DIESEL ENGINE INTAKE, METHOD TO IMPROVE COLD STARTING Sergiu STROE, Rodica NICULESCU, Adrian CLENCI
CONSIDERATIONS ABOUT THE PERFORMANCE OF SI ENGINES FUELED WITH ULTRASONIC CONDITIONED BIOETHANOL-GASOLINE BLENDSFlorin Mariasiu, Bogdan Varga, Doru Baldean, Dan Moldovanu, Simona Florea, Calin Iclodean
CALCULATION MODEL FOR OPTIMIZING THE SPARK IGNITION ENGINE COLLABORATION WITH THE EPOLLUTING SYSTEMSLiþã Daniel, Ivan Florian, Tabacu Ion, Busoi Andrei
A NEW CONCEPT OF THE MIXTURE FORMATION AND COMBUSTION FOR OTTO ENGINE. THE COMBUSTION CHAMBER WITH STRATIFIED MIXTURE BY COMBINING THE OPPOSED SWIRLS MOVEMENT WITH THE MIXTURE TUMBLE MOVEMENTGrünwald B., Ueberschär D., Ivan Fl.
IN-CYLINDER FLOW ANALYSIS OF DIFFERENT VALVE LIFT USING CFDIorga-Simãn Victor, Clenci Adrian, Podevin Pierre, Delacroix Alain, Tabacu Ion
STUDIES REGARDING MODEL BUILDING FOR ENGINE PROCESS SIMULATION IN AVL FIREDan Moldovanu, Nicolae Burnete, Sanda Bodea
THE FINITE ELEMENT MODELING OF A PISTON HEAD OF A SPARK IGNITION ENGINETutunea Dragoº, Neagoe Dumitru, Trotea Mario, Constantinescu Augustin
DIESEL COMBUSTION MODELLING WITH OPENFOAMAdorean Ervin, Radu Gheorghe-Alexandru
CAR2011_1291
CAR2011_1274
CAR2011_1296
CAR2011_1241
CAR2011_1171
15.30-16.45- Room T303
Chairman : Radu GAIGINSKI and Niculae NEGURESCU
INTERNAL COMBUSTION ENGINES – M22
INTERNAL COMBUSTION ENGINES – M23bis
p r o g r a m m eThursday, 3 November
Thursday, 3 November
14
Chairman : Constantin PANÃ and Adrian SACHELARIE
Chairman : Pierre PODEVIN and Radivoje PESIC
LOGISTICS OF APPLICATION NATURAL GAS ON BUSESMilojeviæ Saša, Pešiæ Radivoje
BIO-BASED ADDITIVE EFFECT ON PERFORMANCE AND EMISSION CHARACTERISTICS OF A DIESEL ENGINE FUELED WITH PALM OIL METHYL ESTEROzcanli Mustafa, Serin Hasan, Ozgur Tayfun, Saribiyik Oguz, Yunus Kadir Aydin
THE USE OF HYDROGEN AS AN ALTERNATIVE FUEL IN SI ENGINESPantile Victor, Pana Constantin, Negurescu Niculae, Cernat Alexandru, Radu Alexandru, Rusu Eugen
STUDY OF INCREASE PERFORMANCE MAS DAEWOO ENGINE BOOST WITH THE VARIABLE GEOMETRY TURBOCHARGER AND SUPPLY ETHANOLDragomir Costin
ANALYSIS OF ENERGETICALLY AND EMISSIONS PERFORMANCE ON A SI ENGINE FUELED WITH HYDROGEN IN ADDITIONRusu Eugen, Pana Constantin, Negurescu Niculae, Cernat Alexandru, Pantile Victor, Radu Alexandru
EXPERIMENTAL INVESTIGATIONS OF ETHANOL COMBUSTION IN S.I. ENGINERadu Alexandru, Pana Constantin, Negurescu Niculae, Cernat Alexandru, Rusu Eugen, Pantile Victor
CASTOR OIL BIODIESEL AND ITS BLENDS AS AN ALTERNATIVE DIESEL FUELSerin Hasan, Ozcanli Mustafa
THE FUTURE OF ENERGY: BIOFUELSBenea Bogdan Cornel Chircan, Eliza
INFLUENCE OF THE BURNED MASS FRACTION CENTER POINT ON ENGINE EMISSIONS USING FISCHER-TROPSCH BIOFUEL BLENDSSãcãreanu Sorin, Chiru Anghel, Rauch Reinhard, Hofbauer Hermann, Teiner Philipp, Hofmann Peter
EFFECT OF BIODIESEL BASED ON RAPESEED OIL ON TRACTOR ENGINES PERFORMANCENicolae N. Cordoº, Nicolae Burnete, Orban Magdalena
CAR2011_1144
CAR2011_1175
CAR2011_1187
CAR2011_1183
CAR2011_1295
FUELS – COMB22
FUELS – COMB23
15.30-16.45 Room T308
17.00-18.10 Room T308
CAR2011_1105
CAR2011_1110
CAR2011_1142
CAR2011_1169
CAR2011_1143
p r o g r a m m e
Thursday, 3 November
Thursday, 3 November
15
Chairman : Adrian CLENCI and Michael DELIGANT
16.30-18.00- Room T301
CAR2011_1122
CAR2011_1146
CAR2011_1121
CAR2011_1235
CAR2011_1215
ONE APPROACH FOR MODELING MILLER CYCLE ENGINEDoriæ Jovan
ASSESSMENT OF THE FUEL SAVING ENABLED BY THE HEAT RECOVERY OF EXHAUST GASES USING A THERMOELECTRIC GENERATORDong Yuxiang, El-Bakkali Amin, Feidt Michel, Descombes Georges, Périlhon Christelle
INJECTION TIMING ADJUSTMENT FOR A COMMON RAIL DIESEL SYSTEM USING A 1-D SIMULATION TOOLRadu Ioan-Serban, Abaitancei Horia, Jelenschi Liviu
IMPACT OF STRICTER CO2 AND FUEL ECONOMY LEGISLATIONS TO THE FUEL CONSUMPTION MEASUREMENT TECHNOLOGYKöck Karl
THE THERMODYNAMIC MODELLING OF A SI ENGINEFântânã Nicolae, Mitran Tudor, Rus Alexandru
ASPECTS REGARDING SIMULATION AND TESTING TURBOCHARGER SHAFTSBoricean, Cosmin C-tin, Rosca, Ioan Calin, Balcu, Ion
TURBOCHARGER CHARACTERISTICS AT LOW SPEED AND EXPERIMENTAL MEASUREMENTS OF FRICTION LOSSESPierre Podevin, Michael Deligant, Georges Descombes, Adrian Clenci
COMPARISON OF THE PREDICTION PERFORMANCES OF DIFFERENT MODELS OF RADIAL TURBINE UNDER STEADY AND UNSTEADY FLOW CONDITIONSCouderc Cyril, Chesse Pascal, Chalet David
IMPROVING TRANSIENT RESPONSE OF SI TURBOCHARGED ENGINESLevente Kocsis, Kurt Prevedel, Nicolae Burnete, Lucia Ghioltean, Dan Moldovanu
SINGLE CYLINDER ENGINES – THE TEST ENVIRONMENT FOR COMBUSTION R&DHopfner Wolfgang, Loecker Andreas, Winklhofer Ernst
CAR2011_1129
CAR2011_1218
CAR2011_1112
CAR2011_1299
CAR2011_1177
15.00-16.25- Room T301
Chairman : Karl KOCK and Andreas LOECKER
INTERNAL COMBUSTION ENGINES – M11
INTERNAL COMBUSTION ENGINES – M12bis
p r o g r a m m eWednesday, 2 November
Wednesday, 2 November
16
Chairman : Piotr JAWORSKI and Beatrice LAY
Chairman : Nicolae BURNETE and Bogdan VARGA
COMPUTER SIMULATION OF A MODEL OF AN INTERNAL COMBUSTION ENGINEIliev Simeon, Stanchev Hristo, Hadjiev Kiril
WASTE HEAT RECOVERY ON TRACTOR ENGINE: EXERGY ANALYSIS OF EXHAUST IN TRANSIENT CONDITIONSLacour Stephanie, Descloux Sylvain, Baldi Franscesco, Delacroix Alain, Podevin Pierre
A NUMERICAL OPTIMISATION OF A STIRLING ENGINEBert Juliette, Chrenko Daniela, Sophy Tonino, Le Moyne Luis, Sirot Frédéric
ANALYSIS AND SIMULATION OF INTERNAL FLOW IN MUFFLERS WITH COMPEX STRUCTURETutunea Dragos, George Gherghina, Popa Dragos Laurentiu
THE STUDY OF INFLUENCE FACTORS ON METANIC FERMENTATION AND THE POSSIBILITIES OF SLUDGE UTILIZATION IN AGRICULTUREIvan Ilarie, Deac Teodora, Adrian Florescu
EXPERIMENTAL STUDIES AND NUMERICAL SIMULATION OF SI AND CAI COMBUSTION MODELS FOR BIOETHANOL-GASOLINE BLENDS IN SINGLE CYLINDER ENGINEJaworski Piotr, Priesching Peter, Teodorczyk Andrzej, Bandel Wolfgang, Tatschl Reinhard
CALCULATION MODEL TO SIMULATE FUNCTIONING OF THE DIESEL PARTICULATE FILTER USED ON VEHICLESBusoi Andrei, Ivan Florian, Cristea Dumitru, Lita Daniel
MULTI CHARGE IGNITION FOR MULTIPROCESSING OTTO/DIESEL ENGINEDaviniæ Aleksandar, Pešiæ Radivoje, Taranoviæ Dragan
AN APPROACH FOR MODELLING THE HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) COMBUSTION USING THE VIBE FUNCTIONSCosgarea Radu, Cofaru Corneliu, Aleonte Mihai, Sandu Gabriel
TESTING OF ENERGETICAL AND ECHOLOGICAL POTENTIALS OF THE BIODIESEL FUEL VERSUS ETHANOL FUELIspas Nicolae, Aleonte Mihai
CAR2011_1133
CAR2011_1224
CAR2011_1106
CAR2011_1219
CAR2011_1230
INTERNAL COMBUSTION ENGINES – M21
INTERNAL COMBUSTION ENGINES – M22bis
14.00-15.15 Room T301
15.30-16.45 Room T301
CAR2011_1147
CAR2011_1152
CAR2011_1180
CAR2011_1194
CAR2011_1301
p r o g r a m m e
Thursday, 3 November
Thursday, 3 November
17
Chairman : Dumitru CRISTEA and Hristo STANCHEV
14.00-15.15- Room T308
CAR2011_1232
CAR2011_1132
CAR2011_1214
CAR2011_1231
CAR2011_1158
CAR2011_1225
ELECTRIC vs CONVENTIONAL CARIvanov R., Evtimov I., Kadikjanov G.
PNEUMATIC ENERGY STORAGE FOR HYDRAULIC HYBRID VEHICLE PROPULSIONSoare Ionuþ Tudor, Radu Gheorghe Alexandru, Abaitancei Horia, Radu Sebastian, Petric Aron-Adrian, Coldea Mihaela
MODELING AND ANALYSIS OF A FUEL CELL VEHICLEGlazer, Mircea Nicolae, Oprean, Ioan Mircea, Andreescu, Cristian Nicolae
LIGHT ELECTRIC VEHICLE TRANSPORTATION SYSTEM FOR "POLITEHNICA" UNIVERSITY CAMPUSDanciu, Grigore, Racicovschi, Virgil, Chefneux, Mihaela, Kreindler, Liviu
ACTUAL TRENDS TOWARDS ELECTROMOBILITY IN THE SOUTH EASTERN EUROPEHaba Cristian Gyozo, Lucache Dumitru Dorin
DRIVING-DATA BASED STUDY ON THE RECUPERATIVE POTENTIAL OF HYBRID VEHICLESPreda Ion, Covaciu Dinu, Ciolan Gheorghe, Florea Daniela
REAL LIFE TESTINGFelix Pfister
RESEARCHES ON ADVANCED AIR-FUEL MIXTURE FORMATION SYSTEMS FOR A TWO STROKE SPARK IGNITION ENGINEAleonte Mihai, Cofaru Corneliu, Cosgarea Radu, Jelenschi Liviu, Atanasiu Catalin, George
THERMIC ENGINES AS FOR RUNNING IN A SINGLE REGIMEChioreanu Nicolae, Chioreanu Serban, Fodor Dinu
EXPERIMENTAL RESEARCHES ON ENERGY PERFORMANCE OF A SPARK IGNITION ENGINE WITH GASOLINE INJECTION, IN CONDITIONS OF CHANGING FUEL'S CHARACTERISTICSHiticaº Ioan, Iorga Dãnilã, Mihon Liviu, Henþiu Radu
CONSIDERATIONS ABOUT FUEL QUALITY USED IN MOTOR VEHICLESNicolae Burnete, Florin Mariasiu, Bogdan Varga, Dan Moldovanu, Tiberiu Budisan, Calin Iclodean, Martin Horea
CAR2011_1307
CAR2011_1220
CAR2011_1233
CAR2011_1204
CAR2011_1300
17.00-18.15- Room T301
Chairman : Edward RAKOSI and Liviu MIHON
INTERNAL COMBUSTION ENGINES – M23
MULTIDISCIPLINARY – MLT21
p r o g r a m m eThursday, 3 November
Thursday, 3 November
18
Chairman : Alexandru BOROIU and Ionel VIERU
Chairman : Florea DANIELA and Cornel COFARU
THE EFFECT OF CONVERTING A SIGNALIZED INTERSECTION INTO A ROUNDABOUT - A CASE STUDYCovaciu Dinu, Florea Daniela, Preda Ion, Timar Janos
A PREDICTION MODEL FOR URBAN AIR POLLUTION IN BRASOV CITYTarulescu Stelian, Tarulescu Radu
METHODOLOGY FOR TRAFFIC IMPACT STUDIES FOR MAIN JUNCTIONS / INTERCHANGESNeagu Elena, Nicolae Viorel, Vîlcan Adrian, Ilie Sorin, Vieru Ionel
APPLICATION DATA COLLECTION, MODEL DEVELOPMENT AND APPLICATION TRAFFIC IMPACT STUDIES FOR PODUL VIILOR JUNCTION IN PITESTINicolae Viorel, Neagu Elena, Vîlcan Adrian Mitran, Gabriela Vieru, Ionel
THE ESTIMATION OF TRAVEL DEMAND – THE FIRST STEP TO REORGANIZE A COUNTY ROAD PUBLIC TRANSPORTIlie Sorin, Mitran Gabriela, Boroiu Alexandru, Nicolae Viorel
PEDESTRIAN EXPOSURE TO AIR POLLUTION ALONG A MAJOR ROAD IN BRASOV CITY CENTERTarulescu Stelian, Tarulescu Radu
ASSESSING THE OPPORTUNITY OF ENERGY RECOVERY CONSUMED BY BRAKING ON THE DOWN SLOPES ON THE ROUTE PITEªTI – VEDEA AND ON THE LOCAL TRANSPORT ROUTES IN PITEªTIBoroiu Alexandru, Ilie Sorin, Lefter Emilian, Neagu Elena, Boroiu Alexandru Andrei
A STUDY OF THE ROAD TRAFFIC EVOLUTION AS A RESULT OF THE REAL ESTATE DEVELOPMENT AND ROAD NETWORK EXPANSION WITHIN AN AREA OF BUCHARESTVîlcan Adrian, Ionescu Eugen, Dragomir George, Beles Horia, Nicolae Viorel
COMPARATIVE ANALYSIS OF SOME INVENTORY MANAGEMENT MODELSGhiold Ion, Vieru Ionel, Nicolae Viorel, Neagu Elena
A MODEL FOR DETERMINING THE AVERAGE SPEED OF LIGHT DUTY VEHICLES IN URBAN TRAFFIC IN TERMS OF MINIMUM POLLUTION AND FUEL CONSUMPTIONMitran Gabriela, Tabacu Ion, Ivan Florian, Ilie Sorin, Nicolae Viorel, Boroiu Alexandru
CAR2011_1184
CAR2011_1277
CAR2011_1278
CAR2011_1287
CAR2011_1286
Road Traffic – T11
Road Traffic – T12
15.00-16.25 Room T308
16.35-18.00 Room T308
CAR2011_1160
CAR2011_1185
CAR2011_1263
CAR2011_1264
CAR2011_1285
p r o g r a m m eWednesday, 2 November
Wednesday, 2 November
19
Chairman : Dinel POPA and Doru STÃNESCU
15.00-16.25- Room T309
CAR2011_1288
CAR2011_1248
CAR2011_1249
CAR2011_1251
CAR2011 1306
CAR2011_1250
EVALUATION OF THE STRUCTURAL PERFORMANCES OF THE THERMOPLASTIC MANUFACTURED PARTS USING RESULTS FROM MOLDING ANALYSISTabacu Stefan, Tomuº Cosmin, Baba Viorel
About the bending vibrations with random excitations of the straight barsMonica BALDEA
Program for the numerical calculus of the bending vibrations with random excitations of the straight barsMonica BALDEA
THE GENERAL FORM OF THE EQUATION OF MOTION FOR PLANAR MECHANICAL SYSTEMS THAT ARE COMPOSED WITH JOINTS WITH AND WITHOUT CLEARANCEGrigore Jan-Cristian, Pandrea Nicolae
ISSUES REGARDING THE DETERMINATION OF SOME POINTS SITUATED OUTSIDE THE EPUREMircea LAZÃR
ABOUT TRIBOLOGY'S ROLE IN IMPROVING PERFORMANCES AND RELIABILITY OF CAR 'S MECHANICAL ELEMENTS Nicolae Popa, Constantin Onescu
INNOVATIVE MATERIALS FOR THE PRODUCTION OF AUTOMOBILE'S DOOR SEALING SYSTEMSAstalosch, Christian, Sãcãreanu, Sorin, Chiru, Anghel
THE INFLUENCE OF THE THERMAL CYCLING ON GRAINS SIZE AT THE NICKEL –BASED ALLOYSS C Vulpe, M Abrudeanu, D Ohai, D Benga, G Plaiasu
THE EVOLUTION OF THE MICROSTRUCTURE AND MECHANICAL PROPERTIES ON THE AA2024 ALLOYS AS A FUNCTION OF THE ARTIFICIAL AGEING TEMPERATURERãduþoiu Nicoleta, Abrudeanu Marioara, Petit Jacques-Alain, Alexis Joël, Lacroix Loïc, Rizea Vasile, Plãiaºu Gabriela-Adriana
THE INFLUENCE OF THE WORKING CONDITION OVER THE CUTTING FORCES IN THE PROCESSING OF SOME CERAMICSAlin RIZEA, Adriana-Gabriela PLÃIAªU, Daniel -Constantin ANGHEL
ASPECTS CONCERNING THE INFLUENCE EXERTED BY THE PROPERTIES OF CERAMIC MATERIALS ON THE CUTTING MECHANISM AND THE SURFACE QUALITYAlin RIZEA, Nadia BELU, Daniel - Constantin ANGHEL
CAR2011_1182
CAR2011_1200
CAR2011_1201
CAR2011_1252
CAR2011_1253
14.00-15.15- Room T309
Chairman : Marioara ABRUDEANU and Jacques-Alain PETIT
Materials – MAT21
Applied Mechanics – MEC11
p r o g r a m m eThursday, 3 November
Wednesday, 2 November
20
Chairman : Sofiene DELLAGI and Eduard NIÞU
Chairman : Doina IACOMI and Alin RIZEA
CONFLICT MANAGEMENT IN TECHNICAL PROJECTS IN THE AUTOMOTIVE INDUSTRYSoare, Ionuþ Tudor, Astalosch, Christian, Timar, Janos
USING THE ECO-DESIGN APPROACHING TO REALIZE THE FRIENDLY PRODUCTS FOR THE AUTOMOTIVE INDUSTRYDaniel -Constantin ANGHEL, Adriana-Gabriela PLÃIAªU, Alin RIZEA
COMPARATIVE ANALYSIS OF EMPLOYMENT - ROMANIA AND E.U., FOCUSED ON THE AUTOMOTIVE SECTORBONDOC Maria-Daniela, Popescu Ramona-Florina, Belu, Nadia
SIX SIGMA – QUALITY ASSURANCE PROGRAM USED IN GROWTH OF PROCESS EFFICIENCY AND CLIENT'S SATISFACTION LEVEL IN AUTOMOTIVE INDUSTRYAstalosch Christian, ªoimaru Cristian, Coldea Mihaela
QUALITY ASSURANCE MATRIX IN AUTOMOTIVE INDUSTRYStirbu Luminita, Belu Nadia, Bondoc Maria - Daniela
VARIABLE EXTRUSION – INNOVATIVE MANUFACTURING TECHNOLOGY FOR EPDM COMPONENTS OF SEALING SYSTEMS USED ON AUTOMOBILESAstalus Cristian, ªoimaru Cristian, Coldea Mihaela
EXPERIMENTAL RESEARCH ON THE FORCES OF FORM TAPPING TRAPEZOIDAL PROFILESBoicea Gina, Ungureanu Ion, Niþu Eduard, Iordache Monica, Iacomi Doina
EVOLUTION OF THE CUTTING PROCESS PARAMETERS AS A FUNCTION OF THE CUTTING PARAMETERS OF THE TURNING OF REINFORCED POLYAMIDEMoþoi Marin
STUDIES ON THE SIMULATION FOR THE MILLING PROCESS OF PA 66 – GF 30 Vasile Gheorghe
ANALYTICAL MODELLING OF THE RADIAL COLD ROLLING OF THE TRAPEZOIDAL PROFILESNiþu Eduard, Ungureanu Ion, Iordache Monica, Iacomi Doina
THE INFLUENCE OF PROCESS PARAMETERS ON THE DEFORMATION FORCE WHEN ROLLING TRAPEZOIDAL PROFILES WITH RACK TOOLSIon UNGUREANU, Mãdãlin TUDOR, Eduard NITU, Doina IACOMI, Monica IORDACHE
CAR2011_1178
CAR2011_1188
CAR2011_1195
CAR2011_1254
CAR2011_1255
CAR2011_1256
Product and Process Development – PPD22
Manufacturing Processes – Mp12
15.30-16.45 Room T309
16.35-18.00 Room T308
CAR2011_1181
CAR2011_1242
CAR2011_1244
CAR2011_1176
CAR2011_1247
p r o g r a m m e
Wednesday, 2 November
Thursday, 3 November
21
PERFORMANCE ANALYSES OF HIBRIDE CONTROL PRODUCTION SYSTEMS USING SIMULATIONAna ROTARU
STOCKS MANAGEMENT MATHEMATICAL MODEL FOR COMPANY WITH LIMITED STORAGE AREACiolan Gheorghe, Kirstein Frank, Preda Ion
PRODUCTION AND MAINTENANCE POLICIES OPTIMIZATION UNDER A WITHDRAWAL RIGHT CONSTRAINTZied HAJEJ , Sofiène DELLAGI , Nidhal REZG
OPTIMAL PRODUCTION AND MAINTENANCE PLANNING FOR RANDOM DEMAND WITH VARIABLE PRODUCTION RATE AND SUBCONTRACTING CONSTRAINTSAyed Souheil, Dellagi Sofiene, Rezg Nidhal
MODELING OF A KANBAN CONTROLLED PRODUCTION SYSTEM WITH IDEF0GAVRILUÞÃ Constantin Alin ROTARU, Ana Cornelia
CAR2011_1245
CAR2011_1165
CAR2011_1257
CAR2011_1258
CAR2011_1157
17.00-18.15- Room T309
Chairman : Viorel NICOLAE and Doina IACOMI
Logistics and Maintenance – Lm23
p r o g r a m m eThursday, 3 November
22
p r o g r a m m ePOSTERE
CAR2011_1140
CAR2011_1161
CAR2011_1243
CAR2011_1305
CAR2011_1196
CAR2011_1208
CAR2011_1212
CAR2011_1226
CAR2011_1227
CAR2011_1234
CAR2011_1239
STUDY OF AICRAFT SUPERIOR CLASS TIRE-PAVEMENT OF RUNWAY AND MOVEMENT SURFACEDragomir, Costin, Lazanu, Florin, Sandu, Daniela, Zus, Radu, Ciobanu, Sorinel
AN ASSESSMENT ON THE POSSIBILITY TO REDUCE CO2 EMISSION BY PARTIALLY FUELLING HEAT ENGINES WITH HYDROGENBirtas, Adrian, Voicu, Iulian, Niculae, Gheorghe Chiriac, Radu, Podevin, Pierre, Descombes, GeorgesUtilization of the innovative methods in the redesign process of a product
ANGHEL Daniel - Constantin, Belu Nadia, Alin RIZEATHE CALCULUS OF GPL TOROIDAL FUEL TANK GRIP SCREWSConstantin, Onescu, Nicolae, Popa
STUDIES ON THE INFLUENCE OF TOOL GEOMETRY FOR PROCESSING CUTTING FORCE BY TURNING OF POLYAMIDE PA66 - GF30Moþoi, Marin
CAM SYNTHESIS AND DESIGN OPTIMIZATION OF A MECHANICAL VARIABLE VALVE TIMING MECHANISM WITH CONTINUOUS VALVE LIFTMihalcea Stelian
MATHEMATICAL MODEL OF THE CRANIO-CERVICAL SYSTEM IN A FRONTAL IMPACT TESTING SYSTEMCiunel, Stefanita, Tica,Bebe, Campian. Vasile, Campian, OvidiuVasile
THEORETICAL STUDY AT KINEMATICO-DYNAMICAL OPTIMIZATION TO DRIVING CAPACITY AT AUTOMOTIVESªuster-Bãdãrãu Helene, Ion Tabacu
DETERMINATION OF VIBRATION TRANSMISSIBILITY OF THE SUSPENSION MECHANISM IN THE STRUCTURE OF CAR AREA STABILITYªuster-Bãdãrãu Helene, Ion Tabacu
THE GENERAL ASPECTS OF THE MODELLING GASOLINE INJECTION AT ENGINES WITH SPARK LIGHTINGBlaga, Vasile, Vlad, Ioan, Vlad, Mariana, Vlad, Ioana Andra
ASPECTS REGARDING MOTOR VEHICLES DETECTION SENSORS PLACEMENT IN INTERSECTION FOR REAL-TIME CIRCULATION CONTROLOprica, Theodor, Dumitru, Ilie, Vînãtoru, Matei
23
THE INFLUENCE OF THE AIR VENTS POSITIONING INSIDE THE PASSENGER COMPARTMENT FOR THE HUMAN THERMAL COMFORTIvanescu, Mariana, Neacsu, Catalin, Tabacu, Ion
CONSIDERATIONS ON THE ENDURANCE CALCULATION OF THE FRONT AXLE'S LOWER ARMPetrache, Gheorghe, Anghel, Chiru, Vieru, Ionel, Nicolae, Viorel
MODAL ANALYSIS OF THE DISC BRAKE, THE FORK AND THE CALIPER OF THE FRONT BRAKE ASSEMBLYVieru, Ionel, Petrache, Gheorghe, Nicolae, Viorel, Pârlac, Sebastian
THE DYNAMIC ANALYSIS OF THE FRONT AXLE'S LOWER ARMPetrache, Gheorghe, Vieru, Ionel, Pârlac, Sebastian, Nicolae, Viorel
SIMULATION ON THE MODEL OF ECONOMIC ORDER QUANTITY FOR DETERMINISTIC DEMANDVieru, Ionel, Ghiold, Ion, Nicolae-Doru, Stãnescu
RECORDING IMAGES WITH THE SHADOWGRAPH METHOD FOR THE FLAME FRONT PROPAGATION STUDYDejanu, Marcel, Popa, Dinel, Tabacu, Ion, Pârlac, Sebastian, Dascãlu, Traian
THE RUNNING SIMULATION OF A HYBRID CARPopa, Dinel
APPROXIMATE SOLUTION OF THE NON-LINEAR EQUATION FOR A SYSTEM UNDER A RANDOM VIBRATIONStan, Marinicã, Stan, Petre
THE METHOD OF EQUIVALENT LINEARIZATION FOR SYSTEMS SUBJECTED TO NON-STATIONARY RANDOM EXCITATIONStan, Marinicã, Stan, Petre
THE SPECTRAL RESPONSE FOR THE RANDOM EXCITATION OF THE ELASTIC PENDULUMStan, Petre, Stan, Marinicã
AN EQUIVALENT NON-LINEARIZATION METHOD FOR ANALIZYNG RESPONSE OF NONLINEAR SYSTEMS TO RANDOM EXCITATIONStan, Petre, Stan, Marinicã
KINEMATIC ANALYSIS OF MULTICOUNTOUR MECHANISMSPopa, Claudia Mari, Popa, Dinel
CAR2011_1262
CAR2011_1265
CAR2011_1266
CAR2011_1267
CAR2011_1268
CAR2011_1271
CAR2011_1273
CAR2011_1279
CAR2011_1280
CAR2011_1281
CAR2011_1282
CAR2011_1284
24
CORROSION BEHAVIOR OF STEEL AUTOMOTIVE ENGINE PARTS IN BIODIESEL OF DIFFERENT ORIGINSterpu, Anca Elena-Eliza, Dumitru, Anca Iuliana, Neagu, Aniºoara Arleziana
RESEARCHES ON THE IMPORTANCE OF CHOOSING DRIVING STYLE AND DRIVER BEHAVIOR EVALUATION METHODSCãtãlin Victor Zaharia, Adrian Clenci
RELIABILITY STUDY OF OXYGEN SENSOR BY INCOMPLETE TESTSBoroiu Alexandru, Nicolae Viorel, Ursu Claudiu, Popa Ovidiu, Bazga Marius, Sirbu Aurelian
CONTRIBUTIONS TO THE ACHIEVEMENT OF A SOLAR ELECTRIC VEHICLESerban Florin, Marinescu Danut Gabriel, Senocak Erol, Dan Florian
GRAND HAMSTER -AN 4WD PLUG-IN HYBRID ELECTRIC VEHICLEMarinescu Danut Gabriel, Tabacu Ion, Serban Florin, Tabacu Stefan, Nicolae Viorel, Vieru Ionel, Boicea Nicolae
INFLUENCE OF A HATCHBACK-RACK WITH TWO BICYCLES ON FUEL CONSUMPTION AND MAXIMUM SPEED ON AN AUTOMOBILE FUELED WITH LPGGeorgescu Liviu, Dragomir George, Beles Horia
FITTING BIODIESEL-DIESEL-BIOETHANOL BLENDS TO CI ENGINESIstván Barabás, Ioan-Adrian Todorut, Balcau Monica
THE CURRENT STAGE OF ACOUSTIC ENERGY CONVERSION INTO ELECTRICAL ENERGYCandale Lucian, Filip Nicolae
THE DYNAMIC LOADS' EVALUATION FROM THE CRANK MECHANISM OF THE DIESEL ENGINE FUELED WITH BIODIESEL OBTAINED FROM USED SUNFLOWER OILIoan-Adrian Todorut, István Barabás, Nicolae Vlad Burnete
MODELING THE PNEUMATIC PART OF AN ASSISTED BRAKING SYSTEM BASED ON THE EXPERIMENTAL DATAVilãu Radu, Marinescu Marin, Vînturiº Valentin, Mocian Oana-Alexandra
MECHANISM PLANETARY FOR TRANSFORMATION TRANSLATION MOVEMENT INTO ROTATION MOVEMENT AND REVERSEBãdiþã Marian
CAR2011_1302
CAR2011_1311
CAR2011_1290
CAR2011_1308
CAR2011_1309
CAR2011_1223
CAR2011_1292
CAR2011_1294
CAR2011_1298
CAR2011_1125
CAR2011_1179
25
COMPARISON BETWEEN TWO PULL CONTROL SYSTEMS: KANBAN AND BASE STOCKAna ROTARU
EFFECT OF AUTOMOTIVE REAR SUSPENSION MECHANISM CONFIGURATIONS ON WHEEL PARAMETERSDobre George, Mateescu Viorel, Tica Mihai, Mirica Radu-Florin
THE CAR COLLISION SPEED DETERMINATION THROUGH THE DECOMPOSITION OF THE RETROSPECTIVE MOTION – PERSONAL METHODMircea Fierbinþeanu
STOCKS OPTIMIZATION FOR A RANDOM DISCRETE CONSUMPTION, WITH SEVERAL STOCHASTIC MODELSCiolan Gheorghe, Kirstein Frank, Preda Ion
THE COMPARATIVE ANALYSIS OF THE TWO TYPES OF FRAMES DEVICES FOR THE DUMMY NECK TESTING SYSTEMCiunel , Stefanita, Popa, Dragos Popa, Campian,Ovidiu Vasile, Campian, Vasile
A GENERALIZATION OF THE DEFORMATION COEFFICIENT MODEL TO DETERMINE THE VELOCITIES OF VEHICLESINVOLVED IN COLLISIONGaiginschi Lidia, Agape Iulian, Sachelarie Adrian, Gaiginschi Radu
BEHAVIOR OF A QUARTER-CAR SUSPENSION WITH DAMPER AND QUADRATIC NONLINEARITYStãnescu Nicolae-Doru
SOME ASPECTS REGARDING HYBRID ATV REBUILDINGDiaconescu Eugen, Lefter Emilian, PREDA Ion, Cristea Dumitru
CUSTOMER SATISFACTION AND ADDING VALUE IN CAR DEALERSHIPSFrank Kirstein, Gheorghe CIOLAN
OPTIMIZATION OF PROCESSES WITH SMART REPAIR IN A BODYWORK AND PAINT SHOP Frank Kirstein, Gheorghe CIOLAN
AN ANALYSIS CONCERNING THE MAIN FACTORS AFFECTING THE CAM-FOLLOWER CONTACT CONDITIONSManolache Gheorghe, Rakosi Edward, Talif Sorinel, Popa Florin
CAR2011_1246
CAR2011_1216
CAR2011_1312
CAR2011_1166
CAR2011_1190
CAR2011_1313
CAR2011_1310
CAR2011_1167
CAR2011_1270
CAR2011_1166
CAR2011_1170
26
CAR20111160 THE EFFECT OF CONVERTING A SIGNALIZED INTERSECTION INTO A ROUNDABOUT - A CASE STUDY
Dinu Covaciu*, Daniela Florea, Ion Preda, Janos Timar
Transilvania University of Brasov, Romania
KEYWORDS - road traffic, urban driving, data collection, roundabout, signalized intersection
ABSTRACT – It is generally considered that modern roundabouts reduce vehicle crashes, because traffic speeds in roundabouts are lower than in other signalized intersections. It is also considered that there are less conflict points in roundabouts. On the other hand, modern roundabouts are less expensive than the traffic signals. These obvious advantages led many local authorities to the conslusion that it is a good option to convert the existing signalized intersections into roundabouts. Having the opportunity to record driving data before and after converting some signalized intersection to roundabout, our team made an analysis of the differences in driving parameters before and after. INTRODUCTION
The road traffic flows consist in vehicles interacting each others and also with the road and environment. A traffic flow on an artery has certain characteristics that vary with time and distance. These characteristics are grouped in macroscopic and microscopic parameters (5), (8). The macroscopic parameters describe the behaviour of vehicle groups, as assembly, on a road segment, at a given time or during a period of time. The microscopic parameters describe the position of the individual vehicle, as an entity moving on road and analysed through the driving particularities.
The analysis of driving inside the city can be made globally but also on individual roads or intersections. In case of an intersection it should be considered also the space needed for entering and exiting the intersection, to include the braking and acceleration sequences and all the conflict points (2), (4).
Basically, the analysis of traffic flow through an intersection (signalized or roundabout) starts from the individual vehicle motion, taking into account the speed versus time variation and the acceleration, which allow the rigurous determination of the vehicle dynamics. Then, combining the records of multiple tracks (multiple vehicle passings) can be ascertained the velocity field (the unique velocity v(x,t) associated to each time t, for a point x located on the road) (5). Other macroscopic parameters that can be ascertained and used in the analysis of the traffic flow through an intersection are v50 and v85 (4).
The median speed v50 is the speed achieved or exceeded by 50% of the vehicles, and the speed v85 is the speed not reached by 85% of vehicles (or the speed achieved or exceeded by 15% of vehicles). The speed v85 is recommended as legal speed limit for the analyzed roads (4).
These parameters are used to compare the below and after vehicle motion through the monitored intersections.
The method used for collecting data is the instrumented vehicle method. The instrumented vehicle is a vehicle road user with data acquisition equipment installed (6). In this paper it is considered that the equipment installed on vehicle records only those data related to his behaviour, not also for other vehicles (4).
It is important that the instrumented vehicle to have a similar behaviour of the majority of vehicles in traffic, so that the recorded data to be representative as possible. Data are taken from GPS receivers and basically are: position, time and velocity (1), (7).
FIRST INTERSECTION – DRIVING AHEAD
The first analysed intersection was covered going forward (Fig. 1). The intersection was originally signalized with traffic lights and was converted to a roundabout. The monitored direction was the main road.
Fig. 1: The first intersection on map, with some recorded tracks
Fig. 2: Comparison between roundabout and signalized intersection, 700 m
The comparative analysis was done for a road segment with a length of 700 meters, so that the measured values are not influenced by the previous and next intersections (Fig. 2).
It was observed a decrease of the distance-mean speed, after changing into roundabout, with less than 5% (41.99 km/h to 40.66 km/h), but also an increase of the mean acceleration with more than 25% (from 0.83 m/s2 to 1.11 m/s2).
The cause of the increase of the mean acceleration can be seen in the detail shown in Fig. 3. In case of the original signalized intersection there is only one stop, when entering in the intersection (red color of the traffic light), then a portion with acceleration, weighted by the vehicles flow (since there are many vehicles starting together). In case of roundabout, there are two or even three stops, because beside the stop when entering in roundabout there are also two pedestrian crossings – before and after the roundabout. Exiting the roundabout is accelerated, and since the distance to the vehicle in front is higher than when starting in a intersection signalized with traffic lights, the acceleration may be higher.
Fig. 3: Comparison between roundabout and signalized intersection, detail
For this road segment were calculated the speeds v50 and v85, for both cases. The results are shown in Fig. 4. The median speed v50 is lower in case of roundabout, and v85 is higher.
Fig. 4: Ascertaining of v50 and v85 for roundabout and traffic light
By reducing the analyzed area close to the intersection, on a 300 meters length, the weight of the intersection increase and the results are those shown in Fig. 5 and Fig. 6. The mean distance-speed is decreased more (17%), and the mean acceleration is increased with about 44% in case of the roundabout.
The results of this comparative analysis of the two intersection variants (signalized with traffic lights versus roundabout), for the same intersection location, are given in Table 1.
Fig. 5: Comparison between roundabout and signalized intersection, 300 m
Fig. 6: Ascertaining of v50 and v85 for roundabout and signalized intersection, 300 m
Table 1 – Comparison between traffic lights and roundabout, first intersection
Road segment length
Variant Distance-mean
speed Mean
acceleration Speed v50
(km/h) Speed v85
(km/h)
Traffic lights 41.99 km/h 0.83 m/s2 44.94 km/h 51.70 km/h
Roundabout 40.66 km/h 1.11 m/s2 42.54 km/h 54.33 km/h 700 m
Variation % -3.17% 33.73% -5.12% 5.09%
Traffic lights 33.26 km/h 0.66 m/s2 35.19 km/h 46.54 km/h
Roundabout 27.55 km/h 1.18 m/s2 27.00 km/h 38.57 km/h 300 m
Variation % -17.17% 78.79% -23.27% -17.13%
SECOND INTERSECTION – TURN LEFT
The second analysed intersection was covered turning left (Fig. 7 and Fig. 8, left). The intersection was originally signalized with traffic lights and was converted into two successive roundabouts (Fig. 7 and Fig. 8, right). The main traffic flow is on the track represented in the right side of Fig. 7 (going ahead), since the monitored direction (turning left) has a lower traffic density.
Fig. 7: The second intersection on map, with a recorded track before and after
Fig. 8: Tracks recorded passing through the second intersection, represented as CAD drawing
Fig. 9: Speed and acceleration as function of time (up) and distance (down), recorded for the second intersection, before converting to roundabout
In Fig. 9 and also in Fig. 10, left, can be seen that before converting the intersection to roundabout, the distance traveled was shorter but the time needed to pass through the intersection was very different, in many cases longer than for roundabouts (Fig. 10, right).
As result of converting the signalized intersection into two successive roundabouts, when turning left (entering the intersection from south), the average time needed to pass through the intersection is shorter with 9 seconds, and the distance traveled is longer with 40 meters.
Fig. 10: Comparison between signalized intersection and roundabout (second intersection)
Fig. 11: Ascertaining of v50 and v85 for signalized intersection and roundabout (second intersection)
Table 2 – Comparison between traffic lights and roundabout, second intersection
Road segment length
Variant Distance-mean
speed Mean
acceleration Speed v50
(km/h) Speed v85
(km/h)
Traffic lights 35.20 km/h 0.40 m/s2 36.13 km/h 45.24 km/h
Roundabout 27.32 km/h 0.57 m/s2 27.36 km/h 35.07 km/h 330 - 370
m
Variation % -22.39% 42.50% -24.27% -22.48%
The results of this comparative analysis of the two intersection variants (signalized with traffic lights versus two roundabouts), for the same intersection location, are given in Table 2. The mean distance-speed is decreased with about 22% and the mean acceleration is increased with 42.5% in case of the roundabout. The values of v50 and v85 are also lower in case of roundabout than in case of signalized intersection.
An important issue is to know how many passings through the roundabout are necessary to calculate the statistical parameters, to be compared with the previous variant (signalized intersection with traffic lights), for which there were already made many records. As shown in Fig. 12, the distance-mean speed does not change significantly as the number of records is increased (and the number of speed measuring points is increased too). The diagrams in this figure represent the probability density of speed, as function of distance, for different record numbers.
Fig. 12: The influence of the measurements numbers on the calculated average speed
In order to know the effect of each type of intersection on the environment it can be calculated the level of emissions. It is known that the emission levels (NOx, CO and HC) depend by speed and acceleration. Using a custom software function implemented in Lisp language, it was ascertained the average level of hydrocarbons (2). For the first intersection, the average level of instantaneous HC emission was 1.54 mg/s in case of signalised intersection and 2.45 mg/s in case of roundabout. Of course, these values are approximate only and the real pollution level depends also by the emissions of the individual vehicles. For this study it was considered a theoretical vehicle.
For the second intersection, the average level of instantaneous HC emission was 1.18 mg/s in case of signalised intersection and 1.19 mg/s in case of roundabout. These values are very close and it is obvious that if the vehicle needs a shorter time to pass through the intersection the total emission level will be lower.
CONCLUSIONS
Since the travel speed is lower in case of roundabout than in case of the same intersection signalized with traffic lights, it may be considered that the roundabout is safer (9). But the speed is not the only factor of risk. The roundabouts analysed above have three lanes, so there are much more conflict points than in case of a single lane. Before converting the intersection into roundabout the move of pedestrians was coordinated by dedicated traffic lights. In case of roundabout, the pedestrians are more exposed. So, the roundabouts are not safer than signalized intersections, except the simple case of the roads with a single lane.
An important conclusion resulted from this comparative analysis is the significant increase of acceleration in case of roundabout. This will lead to an increase of the noise level in that intersection, and this means that it is not recommended to change an intersection into roundabout, as a noise reduction measure. This conclusion applies for intersections located inside cities, with intense traffic flow.
Regarding the chemical pollution, the acceleration influences also the emission level in a higher measure than the speed. In the first case, when going ahead through intersection, the average emission level was ingreased significantly after converting to roundabout; in the second case (left turn) the average emission level is almost the same for signalized intersection and roundabout, and since the time is shorter, it is expected a decrease in the total amount of pollutants.
However, this study is only a part of a larger analysis and the main goal of the paper is to present the working method and to show the first results.
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(9) ***, Myths & Facts about Roundabouts, http://www.alaskaroundabouts.com/ ACKNOWLEDGEMENT
This paper is supported by the Sectoral Operational Programme Human Resources Development (SOP HRD), financed from the European Social Fund and by the Romanian Government under the contract number POSDRU POSTDOC-DD, ID59323.