Tank venting control system
AssigneeStant Manufacturing Inc.
InventorsTimothy J. King, Barry S. Chestnut
Life of this patent
Estimating the term…
Abstract
An apparatus is provided for controlling discharge of fuel vapor from within a vehicle fuel tank. The apparatus includes a valve container with an inlet, an outlet, and a chamber, a valve member formed for movement between an open position allowing fuel vapor flow through outlet and a closed position blocking fuel vapor flow through outlet, and a secondary float valve disposed between inlet and valve member. The valve member includes a central post and wing segments defining flow passages sized to permit fuel vapor flow therethrough and to block momentarily liquid fuel flow therethrough. The secondary float valve moves between an open position allowing fuel vapor flow to the wing segments and a closed position blocking liquid fuel flow to the wing segments.
Claims21
An apparatus for controlling discharge of fuel vapor from within a vehicle fuel tank, the apparatus comprising
- a valve container adapted to be mounted in a top wall of the fuel tank and formed to include an inlet in fluid communication with the fuel tank, an outlet, a side wall extending between the inlet and outlet, and a chamber in fluid communication with the inlet and the outlet,
- a valve member disposed in the chamber and formed for movement between an open position allowing flow of fuel vapor through the outlet and a closed position preventing flow of fuel vapor through the outlet, the valve member including a central post and wing segments positioned to lie in a spaced apart relationship about the post, the wing segments being forned to define flow passages sized to permit the flow of fuel vapor therethrough and to block momentarily the flow of liquid fuel therethrough, and
- a secondary float valve disposed between the inlet of the valve container and the valve member and being formed for movement between an open position allowing flow of fuel vapor to the wing segments of the valve member and a closed position blocking flow of liquid fuel to the wing segments.
An apparatus for controlling discharge of fuel vapor from within a vehicle fuel tank, the apparatus comprising
- a valve container adapted to be mounted in a top wall of the fuel tank and formed to include an inlet in fluid communication with the fuel tank, an outlet, a side wall extending between the inlet and outlet, and a chamber in fluid communication with the inlet and the outlet,
- a valve member disposed in the chamber and formed for movement between an open position allowing flow of fuel vapor through the outlet and a closed position preventing flow of fuel vapor through the outlet, the valve member including a central post and wing segments positioned to lie in a spaced apart relationship about the post, the wing segments being formed to define flow passages sized to permit the flow of fuel vapor therethrough and to block momentarily the flow of liquid fuel therethrough,
- a base defining an upper region and a lower region of the valve container and being formed to include a slot therethrough that is in fluid communication with the upper and lower regions, and
- a secondary float valve disposed in the lower region of the container and formed for movement between an open position allowing flow of fuel vapor through the slot in the base and a closed position blocking flow of liquid fuel through the slot.
A fuel vapor control valve for controlling the flow of fuel vapor and liquid fuel through an aperture in a fuel tank having a filler neck, the fuel vapor control valve comprising
- a housing mounted in the aperture and formed to include an inlet in fluid communication with the fuel tank, an outlet, a side wall extending between the inlet and the outlet and defining a chamber disposed between the inlet and the outlet,
- a base coupled to the side wall of the housing and being formed to include a slot therethrough,
- an upper closure member configured for selectively interrupting the flow of fuel vapor through the outlet, and
- a valve member being formed for movement in the chamber between the outlet and the base, the valve member including a post movably coupled to the closure member and a wing segment coupled to the post, the wing segment defining a flow passage that is sized to permit the flow of fuel vapor therethrough and to retard the flow of liquid fuel therethrough, and
- a secondary float valve disposed between the inlet of the housing and the base and formed for movement between an open position allowing flow of fuel vapor through the slot in the base and a closed position blocking flow of liquid fuel through the slot.
Dependencies are inferred from the claim text.