Shell Oil Comapny

Earl Jon Haury

Jiang-Jen Lin

Pen-Chung Wang

Charles Lee Edwards

Garo Garbis Vaporciyan

Sarah L Weaver

Leonard B Graiff

Robert P Aiello

James Robert Macias

William M Ehrhardt

Joseph Graham

The present invention is directed to an additive concentrate for reducing octane requirement comprising a cyclic amide alkoxylate compound of the formula I:

Additive concentrates for rapidly reducing octane requirement

The present invention is directed to the use of cyclic amide alkoxylate compounds as additives in fuel compositions having a major amount of a mixture of hydrocarbons in the gasoline boiling range and a minor amount of one or more cyclic amide alkoxylate compounds of the formula: ##STR1## wherein x is from 2 to 20 and y is from 1 to 50. R.sub.1 and R.sub.2 are independently hydrogen, hydrocarbyl of 1 to 100 carbon atoms or substituted hydrocarbyl of 1 to 100 carbon atoms. R.sub.3 is hydrocarbyl of 1 to 100 carbon atoms or substituted hydrocarbyl of 1 to 100 carbon atoms and R.sub.4 is independently hydrocarbyl of 2 to 100 carbon atoms or substituted hydrocarbyl of 2 to 100 carbon atoms. R.sub.5 is hydrogen, hydrocarbyl of 1 to 100 carbon atoms, or substituted hydrocarbyl of 1 to 100 carbon atoms or acyl of 1 to 20 carbon atoms. The invention is also directed to the use of these cyclic amide alkoxylate compounds for decreasing intake valve deposits, controlling octane requirement increases and reducing octane requirement. The invention is further directed to novel cyclic amide alkoxylate compounds.

Fuel compositions

Reduced fuel consumption of spark ignition reciprocating internal combustion engines is achieved by coating the intake port area of the engine with a thermally insulating material.

Thermal insulated intake ports

An ignition system for spark-ignited internal combustion engines that measures the octane requirement of individual cylinders and optimizes the spark advance timing of the individual cylinders.

Selective ignition timing

Growing community of inventors

Houston, TX, United States of America

Earl Jon Haury