Gasoline fuel
AssigneeUnion Oil Company of California
InventorsPeter J. Jessup, Michael C. Croudace
Life of this patent
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Abstract
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.degree. F. (82.degree. C.) but less than 205.degree. F. (96.1.degree. C.)
Claims155
An unleaded gasoline fuel, suitable for combustion in an automotive engine having the following properties:
- (1) a 50% D-86 distillation point no greater than 205.degree. F.;
- and
- (2) a Reid Vapor Pressure less than 7.5 psi.
An unleaded gasoline fuel, suitable for combustion in an automotive engine, having an olefin content less than 3.0 volume percent, a 50% D-86 distillation point no greater than 205.degree. F., and a Reid Vapor Pressure less than 7.6 psi.
An unleaded gasoline fuel, suitable for combustion in a spark ignition automotive engine, having an octane value of at least 87, an olefin content less than 3.0 volume percent, a 50% D-86 distillation point less than 204.degree. F., and a Reid Vapor Pressure no greater than 8.0 psi (0.54 atm).
An unleaded gasoline fuel, suitable for combustion in a spark ignition automotive engine, having an octane value of at least 87, a Reid Vapor Pressure no greater than 8.0 psi, containing above 77 volume percent paraffins, and having an olefin content less than 10 volume percent.
An unleaded gasoline fuel, suitable for combustion in a spark ignition automotive engine, having an octane value of at least 87, a Reid Vapor Pressure no greater than 7.5 psi, less than 15 volume percent olefins, and a 50% D-86 distillation point no greater than 205.degree. F.
An unleaded gasoline fuel, suitable for combustion in an automotive engine, having a Reid Vapor Pressure no greater than 7.5 psi (0.51 atm), less than 6 volume percent olefins, and a 50% D-86 distillation point no greater than 210.degree. F.
An unleaded gasoline fuel suitable for combustion in a spark ignition automotive engine, said fuel having an octane value of at least 92, a Reid Vapor pressure less than 7.8 psi, and a 50% D-86 distillation point less than 211.degree. F.
An unleaded gasoline fuel suitable for combustion in a spark ignition automotive engine, said fuel having an octane value of at least 87, a Reid Vapor pressure no greater than 7.5 psi, and a 50% D-86 distillation point less than 204.degree. F.
An unleaded gasoline fuel suitable for combustion in an automotive engine, said fuel having a Reid Vapor pressure less than 7.0 psi, and a 50% D-86 distillation point no greater than 210.degree. F.
An unleaded gasoline fuel suitable for combustion in a spark ignition automotive engine, said fuel having an octane value of at least 87, a Reid Vapor pressure no greater than 7.8 psi, a 50% D-86 distillation point no greater than 215.degree. F., and an olefin content no greater than 1.5 volume percent.
An unleaded gasoline fuel suitable for combustion in an automotive engine, said fuel having a Reid Vapor pressure no greater than 7.5 psi, a 50% D-86 distillation point no greater than 215.degree. F., and an olefin content less than 4.0 volume percent.
An unleaded gasoline fuel suitable for combustion in a spark ignition automotive engine, said fuel having an octane value of at least 87, a Reid Vapor pressure no greater than 8.0 psi, a 50% D-86 distillation point less than 205.degree. F., and an olefin content less than 5.0 volume percent.
An unleaded gasoline fuel suitable for combustion in a spark ignition automotive engine, said fuel having an octane value of at least 87, a Reid Vapor pressure no greater than 7.5 psi, and a 50% D-86 distillation point no greater than 205.degree. F., and an olefin content less than 15.0 volume percent.
An unleaded gasoline fuel suitable for combustion in an automotive engine, said fuel having a Reid Vapor pressure no greater than 7.5 psi, and a 50% D-86 distillation point no greater than 210.degree. F., and a paraffin content greater than 65 volume percent.
An unleaded gasoline fuel as defined in claims 1, 32, 38, 43, 52, 60, 65, 61, 115, 118, 45, 48, 99, 104, 109, 112, 44, 13, 93, 94, 72, 80, 75, 53, 113, 115, or 78 wherein the maximum 10% distillation point is 158.degree. F. (70.degree. C.).
An unleaded gasoline fuel as defined in claim 1, 2, 49, 64, 90, 91, 103, 112, 125, 127, 93, 94, 72, 80, 82 or 55 wherein the Reid Vapor Pressure is no greater than 6.8 psi. and the maximum 10% distillation point is 158.degree. F. (70.degree. C.).
An unleaded gasoline fuel, suitable for combustion in a spark ignition automotive engine, having an olefin content less than 3.0 volume percent, a 50% D-86 distillation point no greater than 205.degree. F. (96.degree. C.), the Reid Vapor Pressure is no greater than 8.0 psi (0.54 atm), and an octane value of at least 92.
An unleaded gasoline fuel suitable for combustion in an automotive engine, said fuel having a Reid Vapor pressure no greater than 7.0 psi, and a 50% D-86 distillation point no greater than 215.degree. F., and an olefin content less than 8 volume percent.
An unleaded gasoline fuel, suitable for combustion in a spark ignition automotive engine, having an octane value of at least 87, a Reid Vapor Pressure no greater than 8.0 psi., a paraffin content above 77 volume percent, and a maximum 10% distillation point of 158.degree. F. (70.degree. C.).
Dependencies are inferred from the claim text.