System and method for operating an engine with reduced NOx emissions
OwnerYaw Obenginventor
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Abstract
A method for reducing NOx emissions during operation of an internal combustion engine in commerce which, when burning hydrocarbon fuel as a primary fuel, in the absence of any secondary fuel, has a characteristic stoichiometric ration. The method includes the following: in the absence of electrolytic activity, providing and entraining a quenching species in a gaseous medium and then interacting the quenching species with constituents present during oxidation of the primary fuel in a combustion chamber of the engine.
Claims5
A method for reducing NOx emissions during operation of an internal combustion engine in commerce which, when burning liquid hydrocarbon fuel as a primary fuel, in the absence of any secondary fuel, has a characteristic stoichiometric ratio, the method comprising:
- providing a free nitrogen quenching species for interaction with constituents present during oxidation of the primary fuel in a combustion chamber of the engine while operating the engine at an air-to-fuel ratio greater than the characteristic stoichiometric ratio,
- where the free nitrogen quenching species is a hydroxyl radical carried into the combustion chamber in an adduct, and
- where the hydroxyl radical is provided by entrainment in air passing through an aqueous solution comprising KOH, NaOH, or NH4OH.
A method for reducing NOx emissions during operation of an internal combustion engine in commerce which, when burning liquid hydrocarbon fuel as a primary fuel, in the absence of any secondary fuel, has a characteristic stoichiometric ratio, the method comprising:
- providing a free nitrogen quenching species for interaction with constituents present during oxidation of the primary fuel in a combustion chamber of the engine while operating the engine at an air-to-fuel ratio greater than the characteristic stoichiometric ratio,
- where the quenching species is entrained in a secondary gas passing through an air intake manifold and into the combustion chamber,
- where the secondary gas is emitted from an aqueous solution, and
- where the quenching species is placed in solution with water and is entrained as a constituent of the secondary gas as a gas passes through the aqueous solution.
A method for reducing NOx emissions during operation of an internal combustion engine in commerce which, when burning liquid hydrocarbon fuel as a primary fuel, in the absence of any secondary fuel, has a characteristic stoichiometric ratio, the method comprising:
- providing a free nitrogen quenching species for interaction with constituents present during oxidation of the primary fuel in a combustion chamber of the engine while operating the engine at an air-to-fuel ratio greater than the characteristic stoichiometric ratio,
- where the quenching species is placed in an aqueous solution and entrained in a secondary gas by passing air through the solution in the absence of electrolytic activity that produces Reactive Hydrogen from water molecules.
A method for reducing NOx emissions during operation of an internal combustion engine in commerce which, when burning liquid hydrocarbon fuel as a primary fuel, in the absence of any secondary fuel, has a characteristic stoichiometric ratio, the method comprising:
- providing a free nitrogen quenching species for interaction with constituents present during oxidation of the primary fuel in a combustion chamber of the engine while operating the engine at an air-to-fuel ratio greater than the characteristic stoichiometric ratio,
- where the free nitrogen-quenching species is a hydroxide derived from an inorganic source and is in solution with a Group 1 metal or a Group 2 metal.
Dependencies are inferred from the claim text.