Method for reducing intake valve deposits
AssigneeShell Oil Company
InventorsRoger Francis CRACKNELL, Joseph Michael RUSSO, Allen Ambwere ARADI, Andreas KOLBECK
Life of this patent
Estimating the term…
Abstract
Method for reducing intake valve deposits in a spark ignition internal combustion engine which is fuelled with a gasoline fuel composition, wherein the method comprises introducing into the engine an aqueous based composition, wherein the aqueous based composition comprises (i) water, (ii) from 0 vol % to 40 vol % freezing point suppression agent, (iii) from 0 vol % to 10 vol % of surfactant, and (iv) an amine compound in a blending amount of from 0 ppmw to 1000 ppmw.
Claims17
Method for reducing intake valve deposits in a spark ignition internal combustion engine which is fuelled with a gasoline fuel composition wherein the method comprises introducing into the engine an aqueous based composition, wherein the aqueous based composition comprises (i) water, (ii) from 0 vol % to 40 vol % of freezing point suppression agent, (iii) from 0 vol % to 10 vol % of surfactant, and (iv) an amine compound in a blending amount of from 0 ppmw to 1000 ppmw.
Method according to claim 13 wherein the alcohol is selected from methanol, ethanol, propanol, isopropanol, butanol, isobutanol, and mixtures thereof.
Use of an aqueous based composition for reducing intake valve deposits in a spark ignition internal combustion engine fuelled with a gasoline fuel composition, wherein the aqueous based composition comprises (i) water, (ii) from 0 to 40 vol % of freezing point suppression agent, (iii) from 0 to 10 vol % of surfactant, and (iv) an amine compound in a blending amount of from 0 ppmw to 1000 ppmw.
Dependencies are inferred from the claim text.