초록 ▼

The control of the octane requirement increase phenomenon in an internal combustion engine is achieved by introducing into an internal combustion engine, having manifold and/or combustion surfaces which inhibit the formation of engine deposits, along with the combustion charge, a fuel composition co

The control of the octane requirement increase phenomenon in an internal combustion engine is achieved by introducing into an internal combustion engine, having manifold and/or combustion surfaces which inhibit the formation of engine deposits, along with the combustion charge, a fuel composition containing an octane requirement increase-inhibiting amount of (a) an oil-soluble iron compound and (b) carboxylic acids and/or ester derivatives thereof. In particular the esters of a tertiary alcohol and an unsubstituted, mono-carboxylic acid having at least two carbon atoms, e.g., t-butylacetate, in combination with dicyclopentadienyl iron provides an effective octane requirement increase-inhibiting additive for said internal combustion engine. Preferably the manifold and combustion surfaces of said internal combustion engine are coated with a low density alumina or zirconia coating. More preferably said alumina or zirconia coating further comprises a carbon gasification catalyst, e.g. a nickel, cobalt and manganese-containing catalyst or an iron, copper and cerium-containing catalyst, dispersed therein.

대표청구항 ▼

A method for operating an internal combustion engine with a gasoline combustion charge, which comprises introducing with said combustion charge into said engine an octane requirement increase-inhibiting amount of (a) a gasoline-soluble iron compound and (b) a gasoline-soluble oxygen-containing compo

A method for operating an internal combustion engine with a gasoline combustion charge, which comprises introducing with said combustion charge into said engine an octane requirement increase-inhibiting amount of (a) a gasoline-soluble iron compound and (b) a gasoline-soluble oxygen-containing compound selected from the group consisting of carboxylic acids and ester derivatives thereof, said engine having a combustion surface characterized as having a combination of thermal conductance and thermal penetration properties which inhibit the build-up of deposits resulting from combustion in said engine, without substantially raising the temperature of the incoming combustion charge.