| 摘要 |
<p>A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and a fuel additive composition comprising: (a) about 15 to 2,000 parts per million by weight of 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; (b) about 30 to 2,000 parts per million by weight of a poly(oxyalkylene) amine having at least one basic nitrogen atom and a sufficient number of oxyalkylene units to render the poly(oxyalkylene) amine soluble in hydrocarbons boiling in the gasoline or diesel fuel range; and (c) about 30 to 2,000 parts per million by weight of an aromatic di- or tri-carboxylic acid ester of the formula: <CHEM> wherein R9 is an alkyl group of 4 to 20 carbon atoms, and y is 2 or 3; wherein the total amount of components (a) and (b) is at least about 70 parts per million by weight, and further wherein the weight ratio of component (c) to the total amount of components (a) and (b) is at least about 0.25 to 1. The fuel compositions of this invention are useful for the prevention and control of engine deposits.</p> |
