Method for reducing intake valve deposits

Patent metadata

Field	Value
Publication number	US-11912949-B2
Application number	US-202017762141-A
Country	US
Kind code	B2
Filing date	Oct 20, 2020
Priority date	Oct 22, 2019
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

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.

First claim

We claim:

1. 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) from 58 to 98 vol % water, based on the total volume of components (i), (ii) and (iii), (ii) from 1 vol % to 40 vol % of freezing point suppression agent, based on the total volume of components (i), (ii) and (iii), selected from alcohols, glycols, dialkyl carbamates, and mixture thereof, (iii) from 1 vol % to 10 vol % of surfactant, based on the total volume of components (i), (ii) and (iii), wherein the surfactant is a nonionic surfactant not encompassing an amine compound according to (iv), and (iv) an amine compound selected from polyalkylene based amine compounds, polyetheramine compounds, and mixtures thereof, in a blending amount of from 100 ppmw to 1000 ppmw, based on parts of amine compound per million weight parts of components (i), (ii) and (iii) in combination,
wherein the aqueous based composition is stored in a separate tank and introduced into the engine via an injection system and is injected separately from the fuel in such a way that it creates a washing action on the back of intake valves of said engine by injection into the cylinder, onto the valves or into the manifold of said engine.

2. Method according to claim 1 wherein the spark ignition internal combustion engine is a direct injection spark ignition internal combustion engine.

3. Method according to claim 1 , wherein the amine compound is a polyetheramine.

4. Method according to claim 1 , wherein the surfactant has an HLB in the range from 12.4 to 14.4.

5. Method according to claim 1 wherein the nonionic surfactant is selected from alkyl alcohol ethoxylates, alkylphenol ethoxylates, and mixtures thereof.

6. Method according to claim 1 , wherein the nonionic surfactant is an alkyl alcohol ethoxylate.

7. Method according to claim 1 , wherein the aqueous based composition comprises from 1.0 vol % to 5 vol % of surfactant.

8. Method according to claim 1 , wherein the freezing point suppression agent is an alcohol.

9. Method according to claim 8 , wherein the alcohol is selected from methanol, ethanol, propanol, isopropanol, butanol, isobutanol, and mixtures thereof.

10. Method according to claim 1 , wherein the aqueous based composition is injected into the engine before start-up of the engine.

11. Method according to claim 1 , wherein the amine compound is an alkyl or alkyaryl polyetheramine.

12. Method according to claim 6 , wherein the nonionic surfactant is an alkyl alcohol ethoxylate derived from a C10-C16 alkyl alcohol and having from 6 to 12 ethylene oxide moieties.

13. Method according to claim 1 , wherein the glycols are selected from alkylene glycols.

Assignees

• Shell Oil Co
• Shell Usa Inc

Inventors

• Cracknell Roger Francis
• Russo Joseph Michael
• Aradi Allen Ambwere
• Kolbeck Andreas

Classifications

• C10L1/143 Primary

  mixtures of organic macromolecular compounds with organic non-macromolecular compounds · CPC title

• C10L1/182

  containing hydroxy groups; Salts thereof {(C10L1/1802, C10L1/1805, C10L1/1808, C10L1/1811, C10L1/1814, C10L1/1817 take precedence)} · CPC title

• C10L1/2387

  Polyoxyalkyleneamines {(poly)oxyalkylene amines and derivatives thereof (substituted by a macromolecular group containing 30C) (C10L1/221 takes precedence)} · CPC title

• C10L10/14

  for improving low temperature properties · CPC title

• F02M25/0228

  Adding fuel and water emulsion · CPC title