High octane unleaded fuel compositions and methods for increasing the maximum torque output value produced burning same

Abstract

An unleaded fuel composition comprising: about 45 volume % or more of one or more branched paraffins; about 34 volume % or less of one or more mono- and di-alkylated benzenes; from about 5 to about 6 volume % of one or more linear paraffins having from about 3 to 5 carbon atoms; and, one or more alkanol having from about 2 to 4 carbon atoms in an amount sufficient to boost the octane number of the unleaded fuel composition to 93 or greater, the unleaded fuel composition being free of any other ingredient or combination of ingredients that increases the octane number of the unleaded fuel composition by more than 1.0 unit.

1 . An unleaded fuel composition comprising:
 about 45 volume % or more of one or more branched paraffins;   about 34 volume % or less of one or more mono- and di-alkylated benzenes;   from about 5 to about 6 volume % of one or more linear paraffins having from about 3 to 5 carbon atoms; and,   one or more alkanol having from about 2 to 4 carbon atoms in an amount sufficient to boost the octane number of the unleaded fuel composition to 93 or greater, the unleaded fuel composition being free of any other ingredient or combination of ingredients that increases the octane number of the unleaded fuel composition by more than 1.0 unit.   
   
   
       2 . The unleaded fuel composition of  claim 1  comprising about 10 volume % of the one or more alkanol. 
   
   
       3 . The unleaded fuel composition of  claim 1  comprising about 54 volume % branched paraffins. 
   
   
       4 . The unleaded fuel composition of  claim 1  wherein:
 about 40 vol. % of the blend volatilizes at temperatures of from about 38° C.(100° F.) to about 105° C.(220° F.);   about 50 volume % of the blend volatilizes at temperatures of from about 105° C.(220° F.) to about 121° C.(250° F.);   about 10 vol. % of the blend volatilizes at from about 121° C.(250° F.) to about 149° C.(300° F.).   
   
   
       5 . The unleaded fuel composition of  claim 1  having an octane number of 95 or more. 
   
   
       6 . The unleaded fuel composition of  claim 1  having an octane number of 100 or more. 
   
   
       7 . The unleaded fuel composition of  claim 1  wherein the one or more oxygenate is ethanol. 
   
   
       8 . The unleaded fuel composition of  claim 6  wherein the one or more oxygenate is ethanol. 
   
   
       9 . The unleaded fuel composition of  claim 1  wherein the one or more mono- and di-alkylated benzenes comprise a first amount of toluene and a greater amount of p-xylene. 
   
   
       10 . The unleaded fuel composition of  claim 7  wherein the one or more mono- and di-alkylated benzenes comprise a first amount of toluene and a greater amount of p-xylene. 
   
   
       11 . The unleaded fuel composition of  claim 8  wherein the one or more mono- and di-alkylated benzenes comprise a first amount of toluene and a greater amount of p-xylene. 
   
   
       12 . The unleaded fuel composition of  claim 9  comprising:
 from about 5 vol. % to about 10 vol. % toluene; and, from about 15 to about 29 vol. % p-xylene.   
   
   
       13 . The unleaded fuel composition of  claim 11  comprising:
 from about 5 vol. % to about 10 vol. % toluene; and, from about 15 to about 29 vol. % p-xylene.   
   
   
       14 . The unleaded fuel composition of  claim 1  wherein the one or more linear paraffins having from about 3 to 5 carbon atoms is butane. 
   
   
       15 . An unleaded fuel composition comprising:
 about 10 volume % toluene;   about 15 volume % p-xylene;   about 54 volume % branched paraffins;   about 5 volume % butane; and,   about 10 volume % ethanol.   
   
   
       16 . A method for increasing the maximum torque output value produced by an engine burning an unleaded fuel composition, the method comprising burning the unleaded fuel composition of  claim 1  in the engine. 
   
   
       17 . A method for increasing the maximum torque output value produced by an engine burning an unleaded fuel composition, the method comprising burning the unleaded fuel composition of  claim 14  in the engine. 
   
   
       18 . A method for increasing the maximum power output value produced by an engine burning an unleaded fuel composition, the method comprising burning the unleaded fuel composition of any of  claim 1  in the engine. 
   
   
       19 . A method for increasing the maximum power output value generated by an engine burning an unleaded fuel composition, the method comprising burning the unleaded fuel composition of  claim 14  in the engine. 
   
   
       20 . The method of  claim 16  further comprising producing a maximum torque output value of greater than 361. 
   
   
       21 . The method of  claim 16  further comprising producing a maximum torque output value of 366 or more. 
   
   
       22 . The method of  claim 18  further comprising producing a maximum power output value of 366 standard horsepower or more. 
   
   
       23 . The method of  claim 21  further comprising producing a maximum power output value of 366 standard horsepower or more.