COMPOSITIONS FOR CONTROL OF INDUCTION SYSTEM DEPOSITS

摘要

COMPOSITIONS FOR CONTROL OF INDUCTION SYSTEM DEPOSITS A detergent/dispersant prepared by a process which comprises reacting (i) triethylene tetramine or a combination of ethylene polyamines which approximate triethylene tetramine with (ii) at least one acyclic hydrocarbyl substituted succinic acylating agent characterized by having an acid number in the range of 0.9 to 1.3 and by having a substituent containing an average of 50 to 90 carbon atoms. The detergent/dispersant contains in its molecular structure in chemically combined form an average of from 1.5 to 2.2 moles of (ii) per mole of (i). Distillate fuels and additive concentrates containing such detergent dispersants are effective in reducing the amount of induction system deposits formed in an engine under normal service conditions.