FUEL VAPOR VENT VALVE WITH DYNAMIC PRESSURE RELIEF

摘要

A fuel vapor vent valve assembly (20) includes an anti-trickle valve (34) having a casing (36) defining a first cavity (38). A movable element (56) is disposed within the first cavity (38). The casing (36) defines a lower dynamic vapor passage (48) in fluid communication with an interior of a fuel tank (22). A concave ramp (58) is disposed concentrically about the lower dynamic vapor passage (48), within the first cavity (38). The movable element (56) moves upward along the concave ramp (58) in response to a change in motion to open fluid communication through the lower dynamic vapor passage (48) to vent vapor pressure from within the fuel tank (22) during movement.