Method for reducing emission of pollutants from an internal combustion engine including at least one combustion chamber. A fuel emulsion is injected into a combustion chamber; the fuel emulsion is ignited in the combustion chamber in the presence of air; and the internal combustion engine is operate
Method for reducing emission of pollutants from an internal combustion engine including at least one combustion chamber. A fuel emulsion is injected into a combustion chamber; the fuel emulsion is ignited in the combustion chamber in the presence of air; and the internal combustion engine is operated so as to reduce peak combustion temperature in the combustion chamber. The fuel emulsion has a liquid hydrocarbon fuel, water, at least one emulsifier and at least one oxygen-containing water soluble organic compound. A considerable reduction of particulate emissions is obtained by using this fuel emulsion while maintaining or even further reducing the NOx level which is already reduced by the engine itself.
대표청구항▼
1. 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 i
1. 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; andoperating 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. 2. The method according to claim 1, wherein the water is present in an amount not greater than 15% by weight. 3. The method according to claim 2, wherein the water is present in an amount of 2 to 12% by weight. 4. The method according to claim 3, wherein the water is present in an amount of 2.5 to 10% by weight. 5. The method according to claim 4, wherein the water is present in an amount of 3 to 8% by weight. 6. The method according to claim 1, wherein the oxygen-containing water soluble organic compound is present in a predetermined amount so as to obtain an amount of water soluble organic oxygen of 0.1 to 5% by weight. 7. The method according to claim 6, wherein the oxygen-containing water soluble organic compound is present in a predetermined amount so as to obtain an amount of water soluble organic oxygen of 0.3 to 4% by weight. 8. The method according to claim 7, wherein the oxygen-containing water soluble organic compound is present in a predetermined amount so as to obtain an amount of water soluble organic oxygen of 0.5 to 2.5% by weight. 9. The method according to claim 8, wherein the oxygen-containing water soluble organic compound is present in a predetermined amount so as to obtain an amount of water soluble organic oxygen of 0.8 to 2% by weight. 10. The method according to claim 1, wherein the oxygen-containing water soluble organic compound has a solubility in water at 20° C. of at least 5% by weight. 11. The method according to claim 10, wherein the oxygen-containing water soluble organic compound has a solubility in water at 20° C. of at least 8% by weight. 12. The method according to claim 1, wherein the emulsifier has a hydrophilic-lipophilic balance (HLB) of 2 to 10. 13. The method according to claim 12, wherein the emulsifier has a hydrophilic-lipophilic balance (HLB) of 3 to 8. 14. The method according to claim 1, wherein the emulsifier is present in an amount of 0.1 to 10% by weight. 15. The method according to claim 14, wherein the emulsifier is present in an amount of 0.5 to 5% by weight. 16. The method according to claim 1, further comprising reducing pollution in the form of particulates.
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이 특허에 인용된 특허 (14)
Wade Wallace R. (Farmington Hills MI), Diesel engine emission control system.
McAlister, Roy Edward; Hoekstra, Kraig; Kemmet, Ryan; Grottenthaler, David; Wright, Dustin, High pressure direct injected gaseous fuel system and retrofit kit incorporating the same.
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