Propoxylate-containing fuel compositions for cleaning the intake system in an internal combustion engine

摘要

A fuel composition used as intake valve cleaners for internal combustion engines comprising a main quantity of a liquid hydrocarbon fuel and a pure portion of at least one propoxilate additive of formula (I) is disclosed, wherein n is an integer ranging from 10 to 20, and R1 represents a straight-chain or branched C8-C18 alkyl radical or C8-C18 alkenyl radical; optionally in combination with at least one detergent additive such as, for example, a polyalkylamine of formula (II) R2-NH2, wherein R2 represents a straight-chain or branched polyalkyl radical having a numerical average molecular weight ranging from approximately 500 to approximately 5000. Also disclosed are fuel additive compositions that contain propoxilates of formula (I) and optionally contain additional additives such as the polyalkylamines of formula (II).