6、ermainlydiscusses the optimizationoftheintakeandexhaustsystem andthematchingoffueldelivery system of168F smallgeneralS.I. engine.Wecanimprovethepowerandcontroltheemissionsof168FsmallgeneralS.I. enginebytheoptimizationofintakeandexhaustsystemandthematchingoffuelde
7、liverysystem.Themainfactors of theperformanceofsmallgeneralS.I. engineareexcessairratioorair-fuelratio,combustionchamberandthequalityofthemixture,ignitiontimingandignitionenergy,thequalityoftheintakeandexhaust,oilqualityandtheoperatingtemperatureofthegasolineengi
8、ne.Fromaboveall,excessairratio is one of the mostimportantfactors.Ontheonehand,wecanincreasetheintakeairandreducetheintakeresistancebyincreasingthediameterofth