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1、发动机积碳的检查方法（Inspectionmethodforcarbondepositioninengines）InspectionmethodforcarbondepositioninenginesInspectionmethodforcarbondepositioninengines.Howdoyouknowthattheengineproducescarbondeposits?Youmaythinkthattheenginewillbetakenapart.Afterthebreakup,youcanseethatthecarboniscleaned.
2、Isthatgood?Fromthepointofviewofcarbondeposition,thisisthebestway.However,thismethodhasthehighestcostandthelongesttime,andtheusercannotallowyoutouseitforsolong.Atthesametime,everydisassemblyanddisassemblywillaffecttheservicelifeofanengine,sodisintegrationisnotthebestmethod.Ingeneral
3、,wecanusethismethod,thatis,gostraighttosee,takethesparkplugoff,youcanseetheinsideofthecylindercarbondeposition,theinjectorremoved,youcanseethevalveandinletcarbondeposition.Thereisalsoawaytousethetestequipmenttotesttheoxygensensorvoltagethroughthetestequipment.Normally,thevoltageoft
4、henormaloxygensensorvariesbetween0.3and0.7V.Whenthedepositionofcarbonistoolong,themixingcycleisaffected,whichdevelopstobothsidesandcanchangetothemostdiluteandthemostintensive.Thisisbecausetheaccumulationofcarbonintheabsorptionandreleaseoffuel,affectingtheadjustmentcycle,thecycleisl
5、ong,thevoltagerangeincreases.Atthistime,theoxygensensorvoltagechangesfrom0.1to0.9V,whilethenormalshouldbe0.3to0.7Vchanges,thecentralvalueshouldbe0.45V.Ascarbondepositionoccurs,itbecomesa0.2-0.8Vchange,whencarbondepositionhasoccurred,butnotveryseriously,andwhencarbondioxidereaches0.
6、1-0.9V,carbondepositionisveryserious.Sometimesittakesalongtimetostopat0.9Vor0.1V,andwhenthishappensforalongtime,thecomputerwillreportthattheoxygensensorisoutoforderwhentheoxygensensorisfoundtobeoutoforder.Wecanknowexactlyhowcarbonisproducedbytestingthevoltageoftheoxygensensorbefore
7、wehavereachedthislevel.Generallycheckthevoltageattheidlespeed,andafteraddingafootofoil,andthentestthevoltage,thenthevoltagejumpisrelativelylarge,sothatyoucandetectcarbondeposition.Inaddition,formanyelectricthrottlebodies,carboncanbedetectedbythrottleopening.Atidlespeed,thenormalthr
8、ottleopensbetween1and3degr
