| 主权项 |
1: A method for improving a fuel or a lubricant, the method comprising:
adding at least one copolymer to the fuel or the lubricant, wherein the copolymer comprises a statistical average of
at least 4 acid groups per polymer chain,a ratio of carbon atoms per acid group of 7 to 35, andan acid number of 80 to 320 mg KOH/g, determined by potentiographic titration with 0.5 molar aqueous hydrochloric acid after heating in a 0.5 molar ethanolic potassium hydroxide solution for three hours, and wherein the adding results in the copolymer functioning as at least one selected from the group consisting of a fuel additive for reducing the fuel consumption of a direct injection diesel engine, for minimizing power loss in a direct injection diesel engine, or both, a diesel fuel additive for reducing deposits, preventing deposits, or both in a fuel system, and a gasoline fuel additive for reducing the level of deposits in an intake system of a direct injection spark ignition gasoline engine, a port fuel injector gasoline engine, or both. |
