초록 ▼

By controlling one or more properties of a gasoline fuel suitable for combustion in automobiles, the emissions of NOx, CO and/or hydrocarbons can be reduced. The preferred fuel for reducing all three such emissions has a Reid Vapor Pressure no greater than 7.5 psi (0.51 atm), essentially zero olefin

By controlling one or more properties of a gasoline fuel suitable for combustion in automobiles, the emissions of NOx, CO and/or hydrocarbons can be reduced. The preferred fuel for reducing all three such emissions has a Reid Vapor Pressure no greater than 7.5 psi (0.51 atm), essentially zero olefins, and a 50% D-86 Distillation Point greater than about 180°F. (82°C.) but less than 205°F. (96.1°C.

대표청구항 ▼

A method for operating an automotive vehicle having a spark-induced, internal combustion engine and a catalytic converter to yield a reduced amount of NOx, CO, or unburned hydrocarbons as compared to combusting fuel A/O AVE in said engine, the method comprising: (1) introducing into the engine an un

A method for operating an automotive vehicle having a spark-induced, internal combustion engine and a catalytic converter to yield a reduced amount of NOx, CO, or unburned hydrocarbons as compared to combusting fuel A/O AVE in said engine, the method comprising: (1) introducing into the engine an unleaded gasoline, suitable for combustion in an automotive engine, having the following properties: (a) a Reid Vapor Pressure less than 7.5 psi; (b) a 10% D-86 distillation point no greater than 158°F.; (c) a 50% D-86 distillation point less than 203°F.; (d) a 90% D-86 distillation point less than 300°F.; (e) a paraffin content greater than 65 volume percent; (f) an olefin content less than 8 volume percent; and (g) an octane value of at least 87; and thereafter (2) combusting the unleaded gasoline in said engine; (3) introducing at least some of the resultant engine exhaust emissions into the catalytic converter; and (4) discharging emissions from the catalytic converter to the atmosphere.