Patent ID: 7284507

Claim:
In a method controlling intake air humidification spraying apparatus, the apparatus comprising at least two spraying nozzles ( 1 a , 1 b , 1 c , 1 d ) for spraying a liquid into the intake air, the method improvements characterized in that, when an amount of the liquid to be supplied through the spraying nozzles increases, liquid flow passages are opened for more nozzles ( 1 a , 1 b , 1 c , 1 d ) and/or the liquid flow is directed into a flow passage leading to one of the spraying nozzles that permits a larger liquid flow per unit of time than another of the spraying nozzles, and when an amount of the liquid to be supplied through the nozzles decreases, liquid flow channels are closed at least for one of the spraying nozzles ( 1 a , 1 b , 1 c , 1 d ) and/or the liquid flow is directed to one of the spraying nozzles that permits a smaller liquid flow per unit of time than another of the spraying nozzles, and a substantially constant amount of liquid per unit of time is fed into a supply pipe ( 4 ) for the spraying nozzles and at least a portion of the liquid quantity supplied that is not directed to the nozzles is conveyed into a return pipe ( 5 ).