Fuel system for motor vehicles
AssigneeAB Volvo
InventorBo Harde
Life of this patent
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Abstract
In a fuel system for motor vehicles, comprising a fuel tank, a fuel filler pipe with an opening into the tank, a first gas conduit, one end of which is positioned within the tank and whose opening determines the highest fuel level in the tank when filling the tank, and a second gas conduit which extends from an expansion space in the tank above said highest fuel level to a filter device; the improvement wherein the second gas conduit (4) includes a restriction device (9) which is so arranged that the flow resistance of the gas flow in the direction from the tank (1) to the filter device (8) is greater than in the opposite direction, and a pressure sensor (11) arranged to detect the pressure in the gas volume above the surface (N) of the fuel.
Claims6
In a fuel system for motor vehicles, comprising a fuel tank, a fuel filler pipe with an opening into the tank, a first gas conduit, one end of which is positioned within the tank and whose opening determines the highest fuel level in the tank when filling the tank, and a second gas conduit which extends from an expansion space in the tank above said highest fuel level to a filter device;
- the improvement wherein the second gas conduit (4) includes a restriction device (9) which is so arranged that the flow resistance of the gas flow in the direction from the tank (1) to the filter device (8) is greater than in the opposite direction, and a pressure sensor (11) arranged to detect the pressure in a gas volume above a surface (N) of fuel.
Dependencies are inferred from the claim text.