Method for removing engine deposits in a gasoline internal combustion engine
AssigneeChevron Oronite Company LLC
InventorsMajid R. Ahmadi, Damon C. Vaudrin
Life of this patent
Estimating the term…
Abstract
Disclosed are methods for removing engine deposits in a gasoline internal combustion engine by introducing a cleaning composition into an air-intake manifold of a warmed-up and idling gasoline internal combustion engine and running the engine while the cleaning composition is being introduced. One such cleaning composition suitable for these methods comprises (a) a phenoxy mono- or poly(oxyalkylene) alcohol; (b) at least one solvent selected from (1) an alkoxy mono- or poly(oxyalkylene) alcohol and (2) an aliphatic or aromatic organic solvent; and (c) at least one nitrogen-containing detergent additive.
Claims36
A method for removing engine deposits in a gasoline internal combustion engine which comprises introducing a cleaning composition into an air-intake manifold of a warmed-up and idling gasoline internal combustion engine and running the engine while the cleaning composition is being introduced, said cleaning composition comprising:
- (a) a phenoxy mono- or poly(oxyalkylene) alcohol having the formula:
- 16
- wherein R and R1 are independently hydrogen or methyl and each R is independently selected in each —CH2—CHR—O— unit;
- and x is an integer from 0 to 4;
- or mixtures thereof;
- (b) at least one solvent selected from:
- (1) an alkoxy mono- or poly(oxyalkylene) alcohol having the formula:
- 17
- wherein R2 is alkyl of 1 to about 10 carbon atoms;
- R3 and R4 are independently hydrogen or methyl and each R3 is independently selected in each —CH2—CHR3—O— unit;
- and y is an integer from 0 to 4;
- or mixtures thereof;
- and
- (2) an aliphatic or aromatic organic solvent;
- and
- (c) at least one nitrogen-containing detergent additive.
A method for delivering a cleaning composition to the intake system of a gasoline internal combustion engine which comprises introducing a cleaning composition into an air-intake manifold of a warmed-up and idling gasoline internal combustion engine through a transport means inserted into and located within the interior of the engine to thereby deliver the cleaning composition to each combustion chamber of the engine, and running the engine while the cleaning composition is being introduced, wherein the transport means is separate from the fuel delivery system of the engine.
Dependencies are inferred from the claim text.