Method for controlling deposit formation in gasoline direct injection engine by use of a fuel having particular compositional characteristics
AssigneeExxonMobil Research and Engineering Company
InventorsNoyes L. Avery, Paul Patrick Wells
Life of this patent
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Abstract
The formation of deposits on the injectors of gasoline direct injection engines controlled by combustion in said engine of a fuel comprising a gasoline containing about 12 to 65 vol% aromatics when the aromatics present in the fuel are attributable to the presence in the fuel of light fluid cat cracker stream product, reformate or a mixture thereof, preferably predominantly reformate.
Claims9
A method for controlling the formation of injector deposits in a gasoline direct injection internal combustion engine by combusting in said engine a fuel comprising gasoline containing from about 12 to about 65 vol% aromatics wherein the source of the aromatics is selected from the group consisting of reformate, fluid cat cracker stream, and mixtures thereof and wherein, with respect to the fluid cat cracker stream, light fluid cat cracker stream constitutes about 70% to 100% of the fluid cat cracker stream.
In a method for controlling the formation of injector tip deposits in a gasoline direct injection internal combustion engine by combusting in the engine a fuel comprising gasoline characterized by having a T90 in the range of about 150 to 182° C., an olefins content in the range of about 3.6 to 20 vol%, a sulfur content in the range of about 5 to 400 ppm and an aromatics content in the range of about 10-45 vol%, the improvement comprising using as the source of aromatics a stream selected from reformate, fluid cat cracker stream and mixture thereof and wherein, with respect to the fluid cat cracker stream light fluid cat cracker stream constitutes about 70 to 100% of the fluid cat cracker stream.
Dependencies are inferred from the claim text.