Abstract: The invention relates to a method for controlling the emission of fuel vapor from a fuel tank venting system in a preferably cylinder-specific intake duct of an internal, combustion engine, a control valve permitting the fuel vapor to reach the assigned intake duct synchronously with the intake cycle of the cylinder of the internal combustion engine, the opening time of the control valve being variable. Preferably, for controlling or metering larger amounts of fuel vapor, the opening time is placed in a range, in which there is a higher vacuum in the intake duct. On the other hand, for controlling or metering lesser amounts of fuel vapor, the opening time is placed in a range, in which there already is a lesser vacuum in the intake duct. The closing point of the control valve is also variable and this control valve is not opened, if there is excess pressure in the intake duct.