Spraying method and apparatus
AssigneeMarioff Corporation Oy
InventorTimo Mahlanen
Life of this patent
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Abstract
A method for spraying an aqueous liquid into the air intake duct (2) of a turbocharged piston engine (1) for humidifying the intake air to reduce nitrogen oxide emissions. In a first stage in the method, the intake air is heated by a heat exchanger element (5′) before the turbocharger and water mist is injected into the air intake duct after the first heading stage through at lea one first nozzle (9, 10), and in a second stage the intake air is compressed by the turbocharger (4), causing its temperature to rise, and water mist is injected into the air intake duct through at least one second nozzle (12, 13) after the second stage.
Claims10
In a method spraying an aqueous liquid into a duct (2) to a turbocharger (4) for intake air of a turbocharged piston engine (1) for humidifying the intake air, whereby to reduce nitrogen oxide emissions from the engine, the improvements wherein:
- in a first stage, the intake air is heated by a heat exchanger element (5′) before the turbocharger and first of the aqueous liquid is first injected as a mist into the heated intake air through at least one first nozzle (9,10);
- and
- in a second stage, the first-injected intake air is compressed by the turbocharger (4), causing its temperature to rise, and second of the aqueous liquid is second injected as a mist into the compressed intake air through at least one second nozzle (12,13).
In spraying apparatus for humidifying intake air of a turbocharged piston engine (1) having a turbocharger, whereby to reduce nitrogen oxide emissions from the engine, the improvements comprising:
- at least one first nozzle for spraying an aqueous liquid into a duct (2) to the turbocharger for the intake air;
- and,
- at least one heating element (5′) for heating the intake air in the duct, wherein the at least one first nozzle (9,10) is between the heating element (5′) and the turbocharger.
Dependencies are inferred from the claim text.