简介：Sprayauto-ignitionexperimentswerecarriedoutinaconstantvolumecombustionchamberforsomepurealkanes(n-paraffinswithdifferentchainlength,cyclohexane,n-butylcyclohexane,andisooctane)andblendsofn-decanewithStandardBlendedFuel(isooctane/n-heptane)andproductgasoline.Testresultsshowedthatthereactionactivityofn-paraffinswasrelativelyhigh.Meanwhile,theauto-ignitioncharacteristicsdifferedsignificantlywiththemolecularstructuresofalkanes.Addingdifferentvolumefractionsofn-decanetoStandardBlendedFuelandproductgasolinecouldimprovethefuelreactionactivityatvaryingdegree.Finally,functionalgroupseffectswereusedtosimulatetherelationshipbetweenthemoleculartopologyandtheauto-ignitionquality.