MOTOR VEHICLE TANK VENTILATION DEVICE
A tank ventilation device for motor vehicles with an internal combustion engine fed by a fuel tank (10). Said device comprises a filter element (17) which can be connected to a vent pipe (13) of the fuel tank (10), an air inlet (19), an air outlet (20), and an air pump device (27) for diagnosis of errors. Air pump device (27) is integrated into a pump housing (26) with a pump inlet (29) and a pump outlet (28). In order to obtain a compact design and to save assembly space, the pump housing (26) is placed on the filter housing (17) with a pump outlet (28) which is coaxially oriented with regard to the air inlet (19), and secured to the filter housing (17) by means of elastic fastening elements (43). The junction between the pump outlet (28) and the air inlet (19) is sealed in an airtight manner.