Method for monitoring the leak tightness of a fuel tank system

A computer program product including a non-transitory, machine-readable medium having program code stored thereon, which, when executed by a computer or a control unit, performs:

• a method for monitoring leak tightness of a fuel tank system, the fuel tank system being adapted for supplying fuel to a supercharged internal combustion engine, the method comprising:
• filling a pressure accumulator from a supercharged intake manifold area of the internal combustion engine,
• transferring a pressure from the pressure accumulator into the fuel tank system,
• observing a pressure curve in the fuel tank system, the fuel tank system being closed, and
• determining a presence of a leak in the fuel tank system based on the pressure curve;
• or
• a method for regeneration of an adsorption filter or an activated carbon filter for fuel vapors in a fuel tank system of a supercharged internal combustion engine, comprising:
• regenerating the adsorption filter by flushing the adsorption filter with ambient air, and
• discharging a flushing stream in a direction of an intake manifold of the internal combustion engine,
• wherein the filter is acted upon by a pressure from a pressure accumulator during flushing of the adsorption filter, the pressure accumulator being supercharged via a supercharged intake area of the internal combustion engine.