초록 ▼

An engine cleaner composition and method for removing carbonaceous deposits from engine fuel-system components such as mechanical and electronic fuel injectors, intake valve seats, valves, combustion cylinders, spark plugs, and oxygen sensors may be used on both gasoline and diesel engines. Preferre

An engine cleaner composition and method for removing carbonaceous deposits from engine fuel-system components such as mechanical and electronic fuel injectors, intake valve seats, valves, combustion cylinders, spark plugs, and oxygen sensors may be used on both gasoline and diesel engines. Preferred compositions comprise a synergistic solution of a heterocyclic ring compound in an azeotrope of acetonitrile and water, together with selected surfactants and aromatics. Preferred compositions of the invention may be placed in an aerosol pressurized unit utilizing a compressed gas, such as nitrogen or nitrous oxide, or compressed liquid gas, such as a hydrocarbon or fluorohydrocarbon. Preferred engine cleaning compositions of the invention are substantially non-ozone depleting, are low in global warming, and have a low order of human toxicity. Preferred compositions have a moderate pH and are essentially compatible with metals and elastomers conventionally used in engine fuel-system components. The invention provides a consumer or a professional engine mechanic with a safe, easy and efficient way to clean engine fuel-system components.

대표청구항 ▼

[ What is claimed is:] [1.] An engine cleaner composition comprising(a) a heterocyclic ring compound having a boiling point of about 250.degree. F. or greater;(b) wherein said the heterocyclic ring compound is selected from the group consisting of:2-methyl-1,5-Bis(2-oxopyrrolidin-1-yl)pentane,N-cycl

[ What is claimed is:] [1.] An engine cleaner composition comprising(a) a heterocyclic ring compound having a boiling point of about 250.degree. F. or greater;(b) wherein said the heterocyclic ring compound is selected from the group consisting of:2-methyl-1,5-Bis(2-oxopyrrolidin-1-yl)pentane,N-cyclohexyl-2-pyrrolidone,2-furfurylamine,N-methyl-2-pyrrolidone, and2-pyrrolidone; and(c) a blend of X weight percent water and (100-X) weight percent acetonitrile, where X is in the range of from about 5 to about 25 weight percent based on the combined weight of the water and the acetonitrile.