table of conte - Intranet UniTBv...table of conte table of contents nts FISITA is an independent world body representing over 169,000 automotive engineers belonging to national automotive

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

1

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

3

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



4

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 - RomaniaAssoc. professor


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)

6

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

7

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

8

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


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


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



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



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



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

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Chairman : Karl KOCK and Andreas LOECKER





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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

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Chairman : Dumitru CRISTEA and Hristo STANCHEV

14.00-15.15- Room T308

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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

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Chairman : Edward RAKOSI and Liviu MIHON


MULTIDISCIPLINARY – MLT21



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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

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Chairman : Dinel POPA and Doru STÃNESCU

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CAR2011_1288

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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

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Chairman : Marioara ABRUDEANU and Jacques-Alain PETIT

Materials – MAT21

Applied Mechanics – MEC11



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

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Product and Process Development – PPD22

Manufacturing Processes – Mp12

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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

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Chairman : Viorel NICOLAE and Doina IACOMI

Logistics and Maintenance – Lm23


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p r o g r a m m ePOSTERE

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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

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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

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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

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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

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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%


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)


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.

REFERENCES (1) Covaciu, D.; Florea, D.; Preda, I.; Timar, J.: Using GPS Devices for Collecting Traffic

Data. SMAT2008 International Conference, Craiova, 2008. (2) Covaciu, D.: Solutions on the Study Of Dynamic and In-Traffic Behaviour of

Automotive Vehicles Through CAD/PLM and GPS Integration, PhD Thesis, Transilvania University of Brasov, 2010.

(3) Covaciu, D.; Preda, I.; Florea, D.; Timar, J.; Câmpian, V.: Analysis of a Driving Cycle Proposed for Brasov City. CONAT2010 International Congress, Braşov, 2010.

(4) Covaciu, D.: Use of GPS and CAD in Vehicle Dynamics Study. VDM Verlag, Saarbruecken, ISBN: 978-3-639-35589-5, 2011.

(5) Filip, N.: Ingineria Traficului Rutier (Road Traffic Engineering). Editura Mediamira, Cluj-Napoca, 2010.

(6) Florea, D.; Cofaru, C.; Covaciu, D.; Timar, J.: Data Acquisition Methods for Estimate the Noise Generated by the Road Traffic. 3rd WSEAS Conference on Urban Planning and Transportation UPT 2010, Corfu, Greece, 2010.

(7) Preda, I.; Ciolan, Gh.; Covaciu, D.: Systems Based on GPS Devices Used for Vehicles Dynamic-Behaviour Study. “Intelligent Transportation Systems ITS-Romania-2009” International Conference, Bucuresti. ISBN 978-606-501-026-0, 2009.

(8) Timar, J.: Studies and Researches Regarding the Optimization of Urban Traffic Flows, PhD Thesis, Transilvania University of Brasov, 2010.

(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.

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