Patent ID: 8157904

Claim:
An active carbon filter unit for a tank system comprising: a housing having at least one chamber fillable with active carbon, said filter unit having a gas flow path through said chamber, which includes said active carbon, and which is capable of being brought in connection for fluid communication with the tank system, ambient atmosphere and a connection for producing an underpressure according to an execution of an operation for air removal, aeration or flushing or of a tightness check; a first valve positioned in said flow path for opening and closing the connection of the flow path with the ambient atmosphere; a second valve positioned in said flow path for opening and closing the fluid communication to the connection for producing said underpressure; and a control module in operative connection with the housing into which at least the first and second valves are incorporated, said control module comprising an elongated base body configured to be insertable into a recess of said housing to be connected therewith, said recess having first and second openings in fluid communication with said at least one chamber and which are in said flow path according to the operation being carried out, and said control module including electrical connections for said first and second valves.