Patent ID: 7909024

Claim:
A hydrocarbon vapour filter system for connection between a fuel tank and an intake manifold of a combustion engine, for filtering hydrocarbon vapour released from the fuel tank, comprising at least one vapour filter line of vapour-impermeable material in fluid communication through a vapour-tight connection with the fuel tank, comprising at least one vapour capture portion containing a hydrocarbon vapour capturing material for capturing hydrocarbon vapour having a first end in selective fluid communication through a vapour-tight connection with the fuel tank and an air inlet, and a second end in selective fluid communication through a vapour-tight connection with a vapour purge outlet and the intake manifold; a vent valve for selectively closing off communication between the vapour filter line and the fuel tank or the air inlet, a vapour purge valve for selectively closing off communication between the vapour filter line and the intake manifold or vapour purge outlet, and a means of controlling the vent valve and vapour purge valve, whereby in a first mode at least some vapour flowing from the fuel tank through the vapour filter line is captured by the vapour capturing material, and in a second mode air drawn into the air inlet and through the vapour filter line releases at least some of the captured fuel vapour, regenerating the vapour capturing material.