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ID:6256227
大小:147.50 KB
页数:8页
时间:2018-01-08
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1、Whatareantilockbrakessystem?Antilockbrakesaredesignedtohelpdriversavoidcrashes.Withoutanti-locks,hardbrakingcancausewheelstolock,sendingavehicleintoaskid.Wheellockupcanresultinlongerstoppingdistances,lossofsteeringcontroland,whenroadfrictionisuneven,lossof
2、stabilityifthevehiclebeginstospin.Themainadvantageofanti-locksisthattheycanreducetheseproblemsonwetandslipperyroads.Anti-locksworkwithavehicle'snormalservicebrakestodecreasestoppingdistanceandincreasethecontrolandstabilityofthevehicleduringhardbraking.Thep
3、rinciplebehindanti-locksisthataskiddingwheelprovideslessstoppingforceandcontrolthanawheelthatisrotating.Anti-lockspreventwheelsfromskiddingbymonitoringthespeedofeachwheelandautomaticallypulsingthebrakepressureonanywheelswhereskiddingisdetected.Anti-locksdo
4、n'tmakemuchdifferenceinstoppingdistancesondryroads,althoughtheycanenhancevehiclestabilityandallowdriverstomaintainsteeringcontrolduringemergencystopswhenconventionalbrakesmightallowwheellockupandskidding.Howdoantilockbrakessystem?Sincemostcarsontheroadtoda
5、yhavesomeformofAntilockBrakes(ABS)Ithinkweshouldtakealookathowtheyworkandclearupsomemis-informationaboutthem.Asalways,whatIdescribehereishowmostsystemsworkingeneral.SincedifferentmanufactureshavetheirownversionsofABStheirvalues,specificationsandpartnameswi
6、lldiffer.IfyouarehavingaproblemwiththeABSonyourvehicleyoushouldalwaysrefertothespecificserviceandrepairmanualsforyourvehicle.TheABSisafour-wheelsystemthatpreventswheellock-upbyautomaticallymodulatingthebrakepressureduringanemergencystop.Bypreventingthewhee
7、lsfromlocking,itenablesthedrivertomaintainsteeringcontrolandtostopintheshortestpossibledistanceundermostconditions.Duringnormalbraking,theABSandnon-ABSbrakepedalfeelwillbethesame.DuringABSoperation,apulsationcanbefeltinthebrakepedal,accompaniedbyafallandth
8、enriseinbrakepedalheightandaclickingsoundAnti-locksdifferamongvehicles,buttherearesomebasicsimilarities.Eachsystemhassensorsthatmonitortherotationalspeedsofselectedwheelswhenbrakesareapplied.Whenoneofthesewhe
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