Gasoline additives for reducing the amount of internal combustion engine intake valve deposits and combustion chamber deposits

US7226489B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Simon R. Kelemen · Annandale, US
• Michael Siskin · Dover, US
• Kenneth D. Rose · Media, US
• Harald Schwahn · Wiesloch, DE
• Marco Bergemann · Hockenheim, DE
• Michael Ehle · Ludwigshafen, DE
• Peter Schreyer · Ingolstadt, DE

Key dates

• Filing date: Nov 19, 2002
• Grant date: Jun 5, 2007
• Expiry date: Nov 30, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L10/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compositions and methods are disclosed for reducing combustion chamber deposits (CCD) and/or intake valve deposits (IVD) in spark ignition internal combustion engines. A succinic acid derivative (SAD) of this invention or a mixture with at least one additional component of this invention is added to a liquid hydrocarbon or liquid hydrocarbon-oxygenate gasoline each in an amount of about 0.0005–0.5 wt % of the gasoline. Preferably the gasoline is unleaded. The preferred additional components include polyethers (PE), polyolefin butyrolactam derivatives (BLD), butyrolactam alkoxylates (BLA), tridecanol alkoxylate derivatives (TAD) and polyisobutylene amine (PIBA).