摘要 |
<p>Fuel additives and fuel additive compositions are described comprising: (i) at least one fuel-soluble detergent/dispersant which is (a) a fuel-soluble salt, amide, imide, oxazoline and/or ester, or a mixture thereof, of a long chain aliphatic hydrocarbon-substituted dicarboxylic acid or its anhydride, (b) a long chain aliphatic hydrocarbon having a polyamine attached directly thereto, and/or (c) a Mannich condensation product formed by condensing a long chain aliphatic hydrocarbon-substituted phenol with an aldehyde, and an amine; wherein the long chain hydrocarbon group in (a), (b) and (c) is a polymer of at least one C2 to C10 monoolefin, said polymer having a number average molecular weight of at least about 300; (ii) a fuel-soluble cyclopentadienyl complex of a transition metal; and (iii) a fuel-soluble liquid carrier or additive induction aid. These compositions in use enable surprising improvements in intake valve deposit control as well as other advantages.</p> |
申请人 |
ETHYL PETROLEUM ADDITIVES, INC., RICHMOND, VA., US |
发明人 |
CUNNINGHAM, LAWRENCE J., KIRKWOOD, MISSOURI 63122, US;HOLLRAH, DON P., MIDLOTHIAN, VIRGINIA 23113, US;KULINOWSKI, ALEXANDER M., ST. LOUIS, MISSOURI 63109, US |