Patent ID: 7044112

Claim:
A fuel supply system for an internal combustion engine ( 1 ), comprising a fuel tank ( 5 ), an activated-carbon canister ( 6 ), an inlet manifold ( 3 ) on the internal combustion engine ( 1 ), an air supply duct ( 8 ) leading to the inlet manifold ( 3 ), and an air-mass flow meter ( 12 ) arranged in the air supply duct ( 8 ) and a valve ( 17 ) for controlling the connection of the fuel tank ( 5 ) to the atmosphere via the activated-carbon canister ( 6 ) and, downstream of the air-mass flow meter ( 12 ), a branch ( 13 ) extending from the air supply duct ( 8 ) back to the inlet manifold ( 3 ) via the activated-carbon canister ( 6 ), the branch ( 13 ) inlcuding a mechanically operated regenerating valve ( 18 ) downstream of the activated-carbon canister ( 6 ), the connection ( 21 ) of the fuel tank ( 5 ) to the atmosphere and the connection of the branch ( 13 ) from the air supply duct ( 8 ) to the activated-carbon canister ( 6 ) being both valve-controlled so as to be activated alternately for ventilation of the fuel tank ( 5 ) and for regeneration of the activated-carbon canister ( 6 ).