Patent ID: 8511259

Claim:
A method for reducing emission of pollutants from an internal combustion engine including at least one combustion chamber, comprising: injecting a fuel emulsion comprising a liquid hydrocarbon fuel, water, at least one emulsifier and at least one oxygen-containing water soluble organic compound into the at least one combustion chamber, wherein the at least one emulsifier is selected from a product obtained by reacting (a1) a polyolefin oligomer functionalized with at least one group deriving from a dicarboxylic acid, or a derivative thereof, with (a2) a polyoxyalkylene comprising linear oxyalkylene units, said polyoxyalkylene being linked to a long-chain alkyl group optionally containing one or more ethylenic unsaturation, and wherein the at least one oxygen-containing water soluble organic compound is selected from mono-, di-, and tri-alkylene glycols, and mixtures thereof; igniting the fuel emulsion in the at least one combustion chamber in the presence of air; and operating the internal combustion engine so as to reduce peak combustion temperature in the at least one combustion chamber with a method selected from: (i) recirculating a portion of exhaust gases produced during ignition into the at least one combustion chamber, (ii) controlling injection timing of the fuel emulsion in the combustion chamber, and (iii) compressing and cooling intake air before entering the combustion chamber.