6、ispapermainlydiscusses the optimizationoftheintakeandexhaustsystem andthematchingoffueldelivery system of168F smallgeneralS.I. engine.Wecanimprovethepowerandcontroltheemissionsof168FsmallgeneralS.I. enginebytheoptimizationofintakeandexhaustsystemandthematchingoffueldel
7、iverysystem.Themainfactors of theperformanceofsmallgeneralS.I. engineareexcessairratioorair-fuelratio,combustionchamberandthequalityofthemixture,ignitiontimingandignitionenergy,thequalityoftheintakeandexhaust,oilqualityandtheoperatingtemperatureofthegasolineengine.From
8、aboveall,excessairratio is one of the mostimportantfactors.Ontheonehand,wecanincreasetheintakeairandreducetheintakere