Patent ID: 8440005

Claim:
An active carbon filter intended for the fuel supply system of the internal combustion engine of a vehicle consists of a housing with a first port for connection with the top space of a tank, a second port for connection with the ambient atmosphere, and a third port for connection with an intake manifold of the internal combustion engine, wherein the inside of the housing accommodates flow paths for the different operating states of the active carbon filter between the first, second and third ports, wherein at least one first chamber containing a filler comprised of active carbon is arranged along the progression of these flow paths, and a second chamber containing an electrically heatable heating unit which directly heats air passing through the second chamber is located in the section of the flow path adjacent to the second port and before the at least one first chamber containing a filler consisting of active carbon, wherein the heating unit includes metal wall elements of at least two heating units that initiate the transmission of heat to the air flowing through and/or the filler consisting of active carbon are thermally connected with a shared electrical heating element.