Composition and method for reducing combustion chamber deposits,

Details Composition and method for reducing combustion chamber deposits, Composition and method for reducing combustion chamber deposits,

1996-03-29

1998-05-19

Howard, Jacqueline V.

Fuel and related compositions

Liquid fuels

Organic nitrogen compound containing

44420, C10L 122

Patent

active

057529906

ABSTRACT:
Combustion chamber deposits and intake valve deposits in a spark ignition internal combustion engine which uses a liquid hydrocarbon or liquid hydrocarbon-oxygenate fuel, by using an unleaded fuel to which has been added an additive selected from the group consisting of low boiling alkyl pyridines, 4-vinylpyridine, DMF, N-formylpiperidine, sulfolane, polyolefin, polyether or polyether amine derivatives of DMF, amidene, or N-substituted-2 pyrrolidones, polyolefin in an amount of at least about 1,000 wppm and mixtures thereof. Functionalized polymer detergents can be used alone and added to the fuels in amounts in of about at least 3,000 wppm.

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