Shell Oil Comapny

Leonard B Graiff

Danny Y Ngan

Zaida Diaz

David M Austgen, Jr

Robert P Aiello

Earl Jon Haury

Michael J Riley

Corrie M Leenaars

Richard Miles

Benton E Visser

Peter B Van Benthuysen

Kevin W Poindexter

H Dale Millay

Rudolf F Heldeweg

Greg E Webster

Intake valve deposits in port fuel injected engines are reduced by using a fuel containing a mixture of (a) an oil soluble polyamine selected from (i) an aliphatic alkylene polyamine containing at least one olefinic polymer chain attached to a nitrogen and/or carbon atom of the alkylene radical(s) connecting the amino nitrogen atoms and said polyamine having a number average molecular weight in the range of from about 600 to about 10,000, (ii) a Mannich polyamine comprising the condensation product of a high molecular weight sulfur-free alkyl-substituted hydroxyaromatic compound wherein the alkyl group has a number average molecular weight from about 600 to about 10,000, an amine which contains an amino group having at least one active hydrogen atom, and an aldehyde, wherein the respective molar ratio of reactants is 1:0.1-10:0.1-10, or (iii) mixtures of (i) and (ii) and (b) an oil soluble hydrocarbyl poly(oxyalkylene)aminocarbamate having a number average molecular weight in the range of from about 600 to about 10,000 having at least one basic nitrogen atom wherein the hydrocarbyl group contains from 1 to about 30 carbons atoms, and wherein the mixture is present in an amount of 5-1000 ppmw basis the fuel and the weight ratio of component (a) to component (b) ranges from about 3:1 to about 1:2. The fuels are also compatible with carburetor and throttle body injected engines.

Gasoline composition for reducing intake valve deposits in port fuel

The present invention is a process for reducing the smoke emissions from a jet fuel engine by combusting a jet fuel range hydrocarbon in a jet engine wherein prior to combusting the jet fuel in the engine the jet fuel is treated by the following process: (a) contacting the jet fuel with at least one adsorbent in at least one adsorbent bed under suitable process conditions such that the smoke point of the jet fuel is increased and (b) recovering the jet fuel.

Reduction of jet engine smoke emissions by contacting jet fuel with a

This invention is a method for reducing the particulate emissions tendency of diesel fuel. Also the piston ring sticking, and deposit formation tendency of diesel fuel on the injector and combustion chamber of an internal combustion diesel fuel are reduced. The diesel fuel under the method of this invention is fed to at least one adsorbent bed in which the diesel fuel is contacted with one or more adsorbents under suitable process conditions such that there is a reduction in content of impurities in the fuel which cause the particulate emission causing tendency, piston ring sticking, and deposit formation tendency of the diesel fuel on the injector and/or combustion chamber.

Reduction of diesel engine particulate emissions by contacting diesel

Improved gasoline compositions containing a minor amount of a polyalphaolefin having a viscosity at 100.degree. C. from 2 to 20 centistokes, and optionally also an aliphatic polyamine, an alkali or alkaline earth metal salt of a succinic acid derivative, and/or a polyolefin; together with a concentrate for the production of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.

Gasoline composition

A gasoline motor fuel composition is disclosed comprising a minor and effective amount of at least one sulfurized dioleyl ester of norbornene. Also disclosed is a method for reducing fuel consumption of internal combustion engines by incorporating a sulfurized dioleyl ester of norbornene into the gasoline fuel to said engines and operating the engines for a time sufficient to disperse said ester throughout the oil-contacted surfaces of the engine.

Gasoline composition and method for reducing fuel consumption

The control or reversal of octane requirement increase phenomenon together with improved fuel economy in a spark ignition internal combustion engine is achieved by introducing with the combustion charge a fuel composition containing an octane requirement increase-inhibiting amount of (a) certain oil soluble aliphatic polyamines and (b) certain low molecular weight polymers and/or copolymers of monoolefins having up to 6 carbon atoms, in certain ratio.

Method and fuel composition for control or reversal of octane

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

The inhibition or prevention of octane requirement increase in a spark ignited internal combustion engine is achieved by introducing with the combustion charge a fuel composition containing an octane requirement increase-inhibiting amount of: (a) certain cyclomatic manganese compounds, (b) certain oil soluble aliphatic polyamines, and (c) oil of lubricating viscosity in certain range of weight ratio of (a):(b):(c).

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Houston, TX, United States of America

Leonard B Graiff