Method for operating an internal combustion engine, and internal combustion engine

A method for operating an internal combustion engine comprising

• a combustion engine,
• a fresh gas line, and
• a fuel tank system equipped with
• a fuel tank, and
• a fuel vapor filter, and
• a purge gas line that connects the fuel vapor filter to the fresh gas line, and
• a sensor that is suited for determining a degree of hydrocarbon saturation of purge gas contained in the purge gas line, and
• a tank ventilation valve that is integrated in the purge gas line, and/or
• a purge-gas feed device;
• wherein in response to a control device of the internal combustion engine that is connected by control technology to the tank ventilation valve and/or the purge-gas feed device, a tank ventilation process is initiated, as needed, for which the purge-gas feed device is operated, and/or the tank ventilation valve is opened;
• for the tank ventilation process, a hydrocarbon content of the purge gas being ascertained using the sensor;
• fuel, which is introduced into a combustion chamber of the combustion engine being dosed as a function of the ascertained hydrocarbon content,
• wherein the hydrocarbon content is continuously determined during the tank ventilation process and is utilized to actuate the tank ventilation valve and/or the purge-gas feed device.