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1、HowGIVTsHy-wireWorksCarsareimmenselycomplicatedmachines,butwhenyougetdowntoit,theydoanincrediblysimplejob・Mostofthecomplexstuffinacarisdedicatedtoturningwheels,whichgriptheroadtopullthecarbodyandpassengersalong.Thesteeringsystemtiltsthewheelssidetosidetoturnthecar,a
2、ndbrakeandaccelerationsystemscontrolthespeedofthewheels・Giventhattheoverallfunctionofacarissobasic(itjustneedstoproviderotarymotiontowheels),itseemsalittlestrangethatalmostallcarshavethesamecollectionofcomplexdevicescrammedunderthehoodandthesamegeneralmassofmechanic
3、alandhydrauliclinkagesrunningthroughout.Whydocarsnecessarilyneedasteeringcolumn,brakeandaccelerationpedals,acombustionengine,acatalyticconvertorandtherestofit?Accordingtomanyleadingautomotiveengineers,theydon't;andmoretothepoint,inthenearfuture,theywontMostlikely,al
4、otofuswillbedrivingradicallydifferentcarswithin20years・Andthedifferencewon*tjustbeunderthehood■-owninganddrivingcarswillchangesignificantly,too.Inthisarticle,we'lllookatoneinterestingvisionofthefuture,GeneralMotor'sremarkableconceptcar,theHy-wire.GMmayneveractuallys
5、elltheHy-wiretothepublic,butitiscertainlyagoodillustrationofvariouswayscarsmightevolveinthenearfuture・Hy-wireBasicsTwobasicelementslargelydictatecardesigntoday:theinternalcombustionengineandmechanicalandhydrauliclinkages・Ifyou'veeverlookedunderthehoodofacar,youknowa
6、ninternalcombustionenginerequiresalotofadditionalequipmenttofunctioncorrectly.Nomatterwhatelsetheydowithacar,designersalwayshavetomakeroomforthisequipment.Thesamegoesformechanicalandhydrauliclinkages・Thebasicideaofthissystemisthatthedrivermaneuversthevariousactuator
7、sinthecar(thewheels,brakes,etc.)moreorlessdirectly,bymanipulatingdrivingcontrolsconnectedtothoseactuatorsbyshafts,gearsandhydraulics.Inarack-a.nd-pinionsteeringsystem,forexample,turningthesteeringwheelrotatesashaftconnectedtoapiniongear,whichmovesarackgearconnectedt
8、othecar'sfrontwheels.Inadditiontorestrictinghowthecarisbuilt,thelinkageconceptalsodictateshowwedrive:Thesteeringwheel,pedalandgear-shiftsy
