초록 ▼

A vapor control valve includes first, second, and third valves and a housing formed to include first, second, and third chambers and first, second, and third apertures. The first valve is formed to include a vent aperture and is movable relative to the first aperture to partially close the first ape

A vapor control valve includes first, second, and third valves and a housing formed to include first, second, and third chambers and first, second, and third apertures. The first valve is formed to include a vent aperture and is movable relative to the first aperture to partially close the first aperture to limit flow from the first chamber to the second chamber through the first aperture. The second valve is movable relative to the first valve to open and close the vent aperture and cooperates with the first valve to close the first aperture to prohibit flow from the first chamber to the second chamber through the first aperture in response to rising liquid fuel. The third valve is biased to normally close the third aperture and configured to open the third aperture in response to pressurized fuel vapor to permit flow from the second chamber to the third chamber through the third aperture. The vapor control valve includes a blocker coupled to the second valve and configured to extend through the first aperture into the third chamber to contact the third valve to maintain closure of the third aperture by the third valve when the first aperture is closed by the first and second valves.

대표청구항 ▼

[ What is claimed is:] [1.]1. A vapor control valve assembly mounted to a fuel tank comprising:a valve housing including a vent inlet and a bypass inlet, the vent inlet and bypass inlet in communication with pressurized vapor in the fuel tank,a discharge outlet,a vent passageway connecting the vent

[ What is claimed is:] [1.]1. A vapor control valve assembly mounted to a fuel tank comprising:a valve housing including a vent inlet and a bypass inlet, the vent inlet and bypass inlet in communication with pressurized vapor in the fuel tank,a discharge outlet,a vent passageway connecting the vent inlet to the discharge outlet,a bypass outlet in communication with pressurized vapor in the vent passageway,a bypass passageway connecting the bypass inlet with the bypass outlet,first closure means positioned to lie in the vent inlet moveable between opened and closed positions for closing in response to liquid fuel rising in the valve housing, andsecond closure means positioned to lie in the bypass outlet for normally closing the bypass passageway, the second closure means opening in response to pressure in the bypass passageway having a magnitude greater than a pre-determined pressure and while the first closure means is in its opened position, the first closure means and the second closure means being positioned to lie in coaxial relation to one another.