Abstract:
Diesel fuel oil compositions comprising high molecular weight, high total base number nitrogen containing dispersants provide exceptional diesel fuel injector cleanliness.
Abstract:
The present invention is directed to a fuel additive composition comprising at least two components:(A) a polyether alcohol of the formula ##STR1## wherein in formula (A-1), R is hydrogen or a hydrocarbyl group of 1 to about 30 carbon atoms; R.sup.1 is hydrogen or a hydrocarbyl group of 1 to 5 carbon atoms or mixtures thereof; and x is a number from about 4 to about 40.(B) a hydrocarbylphenol having 1-3 hydrocarbyl groups such that the total weight average molecular weight of the hydrocarbyl groups is about 250 to about 6000.In one embodiment the composition further comprises (C) a nitrogen-containing dispersant.The composition is useful as a fuel additive for reducing intake valve deposits and advantageously, does not contribute to an increase in combustion chamber deposits in port fuel injected internal combustion engines. The invention also relates to concentrates and fuel compositions containing the foregoing fuel additive composition and to a method for fueling an internal combustion engine.
Abstract translation:本发明涉及包含至少两种组分的燃料添加剂组合物:(A)下式的聚醚醇,其中在式(A-1)中,R是氢或1至约30个碳原子的烃基; R 1是氢或1至5个碳原子的烃基或其混合物; (B)具有1-3个烃基的烃基苯酚,使得烃基的总重均分子量为约250至约6000.在一个实施方案中,组合物还包含( C)含氮分散剂。 该组合物可用作减少进气阀沉积物的燃料添加剂,并且有利地不会有助于燃料喷射的内燃机的燃料室沉积物的增加。 本发明还涉及含有上述燃料添加剂组合物的浓缩物和燃料组合物以及一种用于燃烧内燃机的方法。
Abstract:
The present invention is directed to a fuel additive composition containing (i) a polyether alcohol of the formula ##STR1## wherein R is hydrogen or a hydrocarbyl group of 1 to about 30 carbon atoms; R.sup.1 is hydrogen or a hydrocarbyl group of 1 to 5 carbon atoms or mixtures thereof provided that no more than 10 mole % of R.sup.1 is hydrogen and where the polyether alcohol is soluble in gasoline; and x is a number from about 4 to about 40; (ii) a hydrocarbylphenol having 1-3 hydrocarbyl groups such that the total weight average molecular weight of the hydrocarbyl groups is about 250 to about 6000; and (iii) optionally a third component containing a nitrogen-containing dispersant; wherein the weight ratio of the polyether alcohol to the hydrocarbylphenol is about 3:1 to about 1:20. The compositions are useful in reducing intake valve deposit and do not contribute to the increase in combustion chamber deposit in port fuel injected engines.
Abstract:
Motor fuel compositions comprising gasoline are improved to control octane requirement increase (ORI) by including an ester of a carboxylic acid and a polyether polyol, preferably a polyether polyol including oxyethylene, oxypropylene and oxybutylene segments.
Abstract:
Motor fuel compositions comprising gasoline are improved to control octane requirement increase (ORI) by including an ester of an N-acyl sarcosinate acid or salt and a polyether polyol including oxyalkylene units selected from oxypropylene and/or oxybutylene.