Abstract: A device for supplying vapor to the intake air which is supplied to an internal combustion engine is described. The device has a moistening means which is formed as horizontal container which is flown through by the intake air and by a liquid to be evaporated in cross flow and/or parallel flow. The device has an especially flat construction due to the design of the moistening means as horizontal container. The cross flow and/or parallel flow principle in the moistening means assures a good efficiency with respect to the generation of vapor.

Abstract: The invention relates to a method for supplying vapor to intake air that is supplied to an internal combustion engine. The method comprises the steps of compressing the intake air before supplying the vapor and contacting, in a moistening means, the intake air with liquid, by simultaneously feeding the compressed intake air and the liquid into the moistening means and causing the intake air and the liquid to flow in opposite directions through the moistening means. The invention also relates to a device for supplying vapor to the intake air of an internal combustion engine, to which a compressor for compressing the intake air is connected.