METHOD FOR ACCELERATING FOULING OF INJECTORS IN GASOLINE DIRECT INJECTION ENGINES AND FOR EVALUATING PERFORMANCE OF DEPOSIT CONTROL ADDITIVES

摘要

The invention relates to a method for fouling an injector of a gasoline direct injection engine (10), which comprises:- operating the direct injection engine on at least a first stationary engine mode which is defined by a pre-established engine load and a pre-established engine speed, both the preestablished engine load and speed being comprised within 35% and 65% of their maximum values, this at least first stationary engine mode being characterized by high particulate matter generation; wherein the direct injection engine is operated on the at least first engine mode for less than ten hours.;The invention also relates to a method for evaluating the fouling effect of a gasoline formulation in a gasoline direct injection engine which uses the above fouling method.