Method for controlling engine deposits in a direct injection spark ignition gasoline engine

摘要: A method for controlling engine deposits in a direct injection spark ignition gasoline which comprises operating the with fuel composition comprising major amount of hydrocarbons boiling range and an effective deposit-controlling additive comprising: (a) aromatic ester compound formula: or soluble salt thereof, wherein R is hydroxy, nitro —(CH 2 ) x —NR 5 6 , are independently hydrogen lower alkyl having 1 to carbon atoms 0 1; hydrogen, 7 8 atoms; 3 4 polyalkyl group average molecular weight about 450 5,000; (b) poly(oxyalkylene) amine at least one basic nitrogen atom sufficient number oxyalkylene units render range.