| abstract |
(57) [Summary] [Structure] (i) (a) Fuel-soluble salt of long-chain aliphatic hydrocarbon-substituted dicarboxylic acid or anhydride thereof, amide, imide, oxazoline and ester or mixture thereof, (b) A long-chain aliphatic hydrocarbon having a polyamine attached directly to it, and / or (c) a long-chain aliphatic hydrocarbon-a Mannich condensation product formed by condensation of an aldehyde and an amine with a substituted phenol, (a), The long chain hydrocarbon in (b) and (c) is at least 1 A C 2 -C 10 Polymers of monoolefins type, at least one fuel number average molecular weight of the polymer is at least 300 - soluble detergent / dispersant, (ii) a transition metal in the fuel - soluble cyclopentadienyl A fuel additive and a fuel additive composition comprising a complex, and (iii) a fuel-soluble liquid carrier or additive-inducing aid are described. The use of these compositions, together with other advantages, enables a surprising improvement in the control of intake valve deposits. |