Car_Engineering_Concept_Design

April1st,20063rdGeorgiaTechAutoShowCarEngineeringConceptDesignWhensettingtothetaskofconceivinganewcar,Iremindmyselfwhatthebasicsofanautomobileare:“aself-propelledmeansoftransportingPEOPLE”ThestartingpointIuseisthePEOPLEneedingtobetransportedIntheFerraricase,itsofarmeans1(racingsingleseaters),2,or4peopleApril1st,20063rdGeorgiaTechAutoShowMeetOSCAR,thecardesigner’smanikin:April1st,20063rdGeorgiaTechAutoShowOSCAR’s“zero”istheso-calledH-Point,whichcorrespondstothehipjointH-pointApril1st,20063rdGeorgiaTechAutoShowStartingfromtheH-point,theinteriorspacerequirementsmaybedefined:H-pointApril1st,20063rdGeorgiaTechAutoShowTheH-Pointtravelsasaresultoftheseat’sadjustmenttravelenvelopeH-pointtravelenvelopeApril1st,20063rdGeorgiaTechAutoShowIfthecarwearedesigningneedsamoreuprightstance,thefoot-to-Hpointverticaldistancewillincrease,whilethelongitudinaldistancewilldecreaseH-pointApril1st,20063rdGeorgiaTechAutoShowExtremesportscarsneedaveryreclinedstanceinordertoreducevehicleheight;thefoot-to-Hpointverticaldistancewilldecrease,whilethelongitudinaldistancewillincreaseH-pointApril1st,20063rdGeorgiaTechAutoShowCarswithmorethanonerowwillderivetheiroveralldimensionalsofromthedistancebetweentherowsofseatsApril1st,20063rdGeorgiaTechAutoShowFerrarishistoricallyhaveneverhadmorethantworowsApril1st,20063rdGeorgiaTechAutoShowThedistancebetweenfrontandrearrowdeterminethelegspacethesecondrowwillhave;thisdimensiondirectlyinfluenceswheelbaseApril1st,20063rdGeorgiaTechAutoShowOncethestanceandinteriorspacehavebeenestablished,thevehicle’sheightbecomesanalmostdirectconsequenceTheseconsiderationareneededinthreedimensions(width)1234April1st,20063rdGeorgiaTechAutoShowSomebasicrequirementsforcabinentryandexitneedtobedefined→doorseallimits→possibledoorhingeaxisApril1st,20063rdGeorgiaTechAutoShowOthervehiclecomponentscannowbelaidoutRarelycancomponentcharacteristicsbespecifiedasavehicle’sconceptprogresses;weareusuallydealingwithagivencomponentset(engine,transmission,suspension)ifnotwithacompleteplatformApril1st,20063rdGeorgiaTechAutoShowWheelpositioningisverycriticalindeterminingfront-to-rearmassbias,whichinturnaffectsgreatlythevehicle’sthreemaindynamicareas:Itisaveryiterativeprocess;ithelpsifthegeneralvehiclearchitecturehasbeenenvisionedbeforestarting,otherwiseitwillturnintoajourneyintheunknown,whichisgenerallyunsatisfatoryCORNERING-TRACTION-BRAKINGApril1st,20063rdGeorgiaTechAutoShowWheelpositioninginwidthisaffectedbyrelativelyfewelements;Frontwheelsareplacedallowingforengine,structure,andsteerangles...VehiclecenterlineApril1st,20063rdGeorgiaTechAutoShow…rearwheelsareplacedallowingmostlyforcabinspaceand/oralignmentwithfrontwheelsVehiclecenterlineCabinSpaceprofileApril1st,20063rdGeorgiaTechAutoShowOthervehiclerequirementshavetobebroughtin...→fuelcapacityasaconsequenceofdesiredrange→luggagespaceApril1st,20063rdGeorgiaTechAutoShow...aswellassafetyconsiderations...→crashcollapsespace→occupantspaceforsafetyApril1st,20063rdGeorgiaTechAutoShow...andlegislation:→visibility→bumperplacementApril1st,20063rdGeorgiaTechAutoShowAtthispoint,thevehicle’smaindimensionsandproportionsarepreliminarilysetlongitudinally,vertically,...→wheelbase→overhangsandthereforeoveralllength→groundclearanceandoverallheightApril1st,20063rdGeorgiaTechAutoShow…andlaterally→frontandreartracks→frontandrearpassengeraccessVehiclecenterlineH-pointFrontandrearheadenvelopes→headspace(roofwidth)→overallwidth+dooropeningBodyaccessApril1st,20063rdGeorgiaTechAutoShowTHEBASICSNEEDEDINORDERTOKICKOFFTHESTYLINGACTIVITYAREESTABLISHED→wehavetheVEHICLEPACKAGE!