Patent ID: 8495863

Claim:
A tank ventilation device for a motor vehicle, comprising: at least one storage device for storing hydrocarbon gas, a tank connection, a ventilation line and a fuel tank, the tank connection connected via the ventilation line to the fuel tank of a vehicle, an engine connection, a regeneration line and a fresh gas system, the engine connection connected via the regeneration line to the fresh gas system of an internal combustion engine of the vehicle, an environment connection and an environment line, wherein the environment connection communicates via the environment line with an environment of the vehicle, at least one conversion device for materially converting hydrocarbon gas, which device is connected one of directly and indirectly to the fuel tank via a feed line on an input side, and a control valve connecting the ventilation line to the feed line, which control valve is adapted to block hydrocarbon gas flow from the fuel tank to the conversion device and permit hydrocarbon gas flow from the fuel tank to the storage device during standard ventilation, which control valve is further adapted to permit hydrocarbon gas flow from the fuel tank to the conversion device and block hydrocarbon gas flow from the fuel tank to the storage device during refueling.