| 摘要 |
<p>A fuel additive composition comprising: (a) an aromatic ester compound of the formula: <CHEM> or a fuel soluble salt thereof, wherein R is hydroxy, nitro or -(CH2)x-NR5R6, wherein R5 and R6 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms and x is 0 or 1; R1 is hydrogen, hydroxy, nitro or -NR7R8, wherein R7 and R8 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms; R2 and R3 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms; and R4 is a polyalkyl group having an average molecular weight in the range of about 450 to 5,000; and (b) an aliphatic hydrocarbyl-substituted amine having at least one basic nitrogen atom, wherein the hydrocarbyl group has a number average molecular weight of about 400 to about 1,000. The fuel additive compositions of this invention are useful as fuel additives for the prevention and control of engine deposits.</p> |
