Patent ID: 9157041
Filing Date: 2015-10-13
Classification: C10L

Abstract:
1. A method for improving the engine performance of a diesel engine with a high pressure fuel system comprising adding a compound to diesel fuel to form a diesel fuel composition, wherein the compound is the product of a Mannich reaction between; (a) formaldehyde; (b) a polyamine having 2 to 15 nitrogen atoms selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, heptaethyleneoctamine, propane-1,2-diamine, 2(2-amino-ethylamino)ethanol, N (c) an alkyl substituted phenol, wherein the or each substituent of component (c) has an average molecular weight of less than 300 and molecules of the Mannich reaction product have an average molecular weight of less than 2000; and combusting said diesel fuel composition in said diesel engine; wherein the engine has a pressure in excess of 1350 bar; and wherein the improvement in performance is measured by one or more of: (i) a reduction in power loss of the engine; (ii) a reduction in deposits on the injectors of the engine; (iii) a reduction in deposits in the vehicle fuel filter; or (iv) an improvement in fuel economy.