Fuel additive containing inner quaternary ammonium salt

Claim 1

A motor fuel composition comprising a gasoline base fuel and from 0.005 to 1 weight percent of a carburetor detergent reaction product, said carburetor detergent reaction product being obtained by preparing an initial mixture consisting of from 5 to 30 weight percent of butyl methacrylate, 50 to 81 weight percent of a higher ester of methacrylic acid consisting of between 10 and 25% by weight of C 16 -C 20 esters of methacrylic acid and 40 to 60 weight percent of a C 12 -C 15 aliphatic ester of methacrylic acid, and from 4 to 20 weight percent of a nitrogen containing compound selected from the group consisting of 4-vinylpyridine and dimethylaminoethyl methacrylate and reacting said mixture in the presence of a polymerization catalyst and polymerization initiator to produce a first polymerization reaction product, mixing said first polymerization reaction product with an unsaturated acid selected from the group consisting of maleic acid and acrylic acid to form a second reaction mixture, and reacting said second reaction mixture at a temperature ranging from 150° to 200° C. to form said carburetor detergent reaction product.