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1、CANbusdevelopmentInFebruary1986，RobertBoschinSAE(SocietyofAutomotiveEngineers)GeneralAssemblyintroducedanewtypeofserialbus-CANControllerAreaNetwork,itistimeforthebirthofCAN.Today,almosteveryoneinEurope,newpassengercarsareequippedwithCANLAN.Similarly，CANisalsousedforothertypesofvehicles

2、,fromtrainstoshipsorforindustrialcontrol.CANhasbecomeaworldwideoneofthemostimportantofthebus•orevenleadingtheserialbus.In1999,nearly610millionCANcontrollerintoused.In2000,marketsalesofmorethan100millionCANdevice.Earlierin1980，Boschengineersbegantodemonstrateatthetimeserialbususedforpas

3、sengercarsystemisfeasible.Becausethereisnoready-madenetworksolutioncanfullymeettherequirementsofautomotiveengineers，then，inearly1983,UweKienckestartofanewserialbus.Themaindirectionofthenewbustoaddnewfeaturestoreducetheelectricalcablesothatitcanbeusedforproducts,ratherthantodrivetechnol

4、ogy.Mercedes-Benzengineersfromtheearlydevelopmentofthestateofthebusdescription,andIntelisalsopreparingforamajormanufacturerofsemiconductorproduction.OneconsultantwashiredfromGermany，Braunschweig-WolfenbiittelUniversityofAppliedScience，ProfessorDr.WolfhardLawrenzgiventhenameofthenewnetw

5、orkprogram"ControllerAreaNetwork'referredtoasCAN.FromKarlsruheUniversity,ProfessorDr.HorstWettsteinprovidestheoreticalsupport.February1986,CANwasborn.IntheDetroitSocietyofAutomotiveEngineersCongress，fromBoschtostudythenewbussystemknownastheHcarsSerialControllerAreaNetwork.’’UweKiencke，

6、SiegfriedDaisandMartinLitschelintroducedtheprogramofthemulti-masternetwork.Thisprogramisbasedonnon-destructivearbitrationmechanism,toensurehigh-prioritypacketdelay-freetransmission.Also，donotneedtosetthebusmastercontroller.Inaddition，CANFather-thefewprofessorsandBosch’sWolfgangBorst，Wo

7、lfgangBotzenhard，OttoKarl,HelmutSchelling，JanUnruhhaveachievedanumberofspeciesintheerrordetectionmechanismsinCAN?Theerrordetectionbutalsofaultnodeautomaticallydisconnectfeaturetoensurecontinuedcommunicationbetweentheremainingnodes.Transmissionofmessagesnotbasedonpackettransmitter/rec