| 摘要 |
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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