Spraying method and apparatus

Details Spraying method and apparatus Spraying method and apparatus

2007-06-05

2007-06-05

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Water and hydrocarbon

Reexamination Certificate

active

10511943

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.

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