초록 ▼

Coking in and around the injector nozzles of indirect injection compression ignition engines is reduced by means of distillate fuel with which has been blended suitable concentrations of (i) organic nitrate ignition accelerator, and (ii) an additive selected from the group consisting of fuel-soluble

Coking in and around the injector nozzles of indirect injection compression ignition engines is reduced by means of distillate fuel with which has been blended suitable concentrations of (i) organic nitrate ignition accelerator, and (ii) an additive selected from the group consisting of fuel-soluble aliphatic hydrocarbon-substituted succinimide, succinamide and mixtures thereof. The aliphatic hydrocarbon group contains about 12-36 carbon atoms and is derived from an isomerized straight chain a

대표청구항 ▼

Distillate fuel for indirect injection compression ignition engines containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) an additive selected from the group consisting of alkenyl substituted succinimide, alkenyl substituted succinamide and mixtures thereof wherei

Distillate fuel for indirect injection compression ignition engines containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) an additive selected from the group consisting of alkenyl substituted succinimide, alkenyl substituted succinamide and mixtures thereof wherein said alkenyl substituent contains about 12-36 carbon atoms, said additive being made by the process comprising (a) isomerizing the double bond of an a12-36 carbon atoms to obtain a mixture of internal olefins, (b) reacting said mixture of internal olefins with maleic acid, anhydride or ester to obtain an intermediate alkenyl substituted succinic acid, anhydride or ester, and (c) reacting said intermediate with ammonia to form a succinimide, succinamide or mixture thereof, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.