Gasoline composition for reducing intake valve deposits in port fuel injected engines
This patent describes an unleaded fuel composition. It comprises a major amount of hydrocarbon base fuel of the gasoline boiling range containing an effective amount to reduce intake valve deposits in electronic port fuel injected engines of a mixture of about 2.5 ppmw or higher of basic nitrogen based on the fuel composition in the form of an oil soluble aliphatic alkylene polyamine containing at least one olefinic polymer chain attached to at least one nitrogen or carbon atom of the alkylene radical connecting the amino nitrogen atoms and the polyamine having a molecular weight in the range of from about 600 to about 10,000 and from about 75 ppmw to about 125 ppmw based on the fuel composition of at least one component selected from a polymer of a C{sub 2} to C{sub 6} monoolefin, the corresponding hydrogenated polymer or copolymer, an oil soluble poly(oxyalkylene) alcohol, glycol or polyol or a mono or di ether thereof, which has the formula R{sub 1}-O-(R{sub 2}O){sub n}-R{sub 3} wherein R{sub 1} and R{sub 3} each independently is a hydrogen atom or an aliphatic, cycloaliphatic or mononuclear aromatic hydrocarbon group of up to 40 carbon atoms, R{sub 2} represents an alkylene group and n is an integer of at least 7, a naphthenic or paraffinic oil having a viscosity of 100{degrees}C.
- Assignee:
- Shell Oil Co., Houston, TX (USA)
- Patent Number(s):
- US 5006130; A
- Application Number:
- PPN: US 7-372578
- OSTI ID:
- 5116697
- Resource Relation:
- Patent File Date: 28 Jun 1989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
UNLEADED GASOLINE
CORROSION INHIBITORS
ALKANES
AMINES
BOILING POINTS
CHEMICAL COMPOSITION
FUEL ADDITIVES
ORGANIC POLYMERS
ADDITIVES
FUELS
GASOLINE
HYDROCARBONS
LIQUID FUELS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
POLYMERS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
023000* - Petroleum- Properties & Composition