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1、汽车液压、液力与气压传动典型汽车液压系统结构原理分析Forexample,theautohydraulicsystemisanalyzedAutobrakeantilock(ABS)systemThecompositionoftheABSsystemTheABSsystemismainlycomposedofABScontroller(ineludingelectroniccontrolunitandhydraulicunit,hydraulicpump,etc・)，fourwheelspeedsensor,ABSfaultwarningl
2、amp,brakewarninglamp,etc・Itshydraulicsystemisshowninfigure1Figure1.TheABShydraulicsystem1一accumulator;2一thereliefvalve;3一electromagneticvalve;4-wheelcylinder;5一accumulator;6-pressurealarmswitch;7一brakemastercylinder;8一electricpumpTheadvantagesoftheABSsystemABShasthefollowi
3、ngadvantagesoverconventionalbrakesystems:Improvingbrakingefficiency.Thisisbecausetheemergencybrakingunderthesamecondition,theABSsystemcanslipratecontrolataround20%,makefulluseofthelongitudinaladhesioncoefficientandlargerlateraladhesioncoefficient,makethegroundofthemaximumb
4、rakingforcebetweenthewheelandground,shortenthebrakingdistance・(2)improvingthedirectionstabilityofcarbraking・Whenthecarisbraking,thehorizontalattachmentcoefficientisverysmallifthewheelisdead,andthecarisveryslippery.ABScontrolstheslipratebetween8%and25%,withalargehorizontala
5、dhesion,andsufficientresistancetolateralinterference・(3)improvethewearandtearofthewhee1.Thewheelofthecariswornandthedragofthewheelwillcausethetiretoweardown,thetirewillwearoutandthetirewillwearout・Themensuration,carduringemergencybraking,wheellocktirecausedbytheaccumulativ
6、eMoSunFei,hasmorethanonesetofthecostoftheanti-lockbrakingsystem,shortentheservicelifeoftires,ABSsystemcanpreventtheproblem・(4)reducingtheintensityofthedriver'slabor,reducingthedriver，snervousnessandimprovingthepassenger，scomfortandsafety.Itiseasytouse,reliableandconvenient
7、tomaintain・ThemechanismofthebrakepressureregulatoroftheABSsystemBrakepressureadjustingdevice(hereinafterreferredtoasthehydraulicpressureregulator)ismainlycomposedofeight22throughregulatingtheelectromagneticvalve,aduplexhydraulicpistonpump,twoliquidstoragechamber,2lowpressu
8、restorageroom,1electrichydraulicpumpandseveralcheckvalve,etc・Electrichydraulicpumprotatin
