Mount for inlet check valve

Abstract

According to the present disclosure, a fuel-delivery control system is provided for regulating flow through a filler neck into a fuel tank. The system includes a valve mount coupled to the fuel tank and formed to include a fuel-delivery channel and an inlet check valve positioned to lie in the fuel-delivery channel.

1 . A fuel system comprising
 a fuel-delivery control unit including a valve mount adapted to be coupled to and interconnect a fuel tank and a fuel tank filler neck, the valve mount being formed to include a fuel-delivery channel arranged to conduct liquid fuel and fuel vapor between an interior region formed in the fuel tank and a passageway formed in the fuel tank filler neck, the fuel-delivery control unit further including an inlet check valve positioned to lie in the fuel-delivery channel and configured to regulate flow of liquid fuel through the fuel-delivery channel between the fuel tank and the fuel tank filler neck, wherein the valve mount includes   a shell made of a weldable plastics material and   a fuel-vapor blockade insert encapsulated in the shell and made of a material that is impermeable to flow of fuel vapor.   
     
     
         2 . The fuel system of  claim 1 , further comprising a fuel tank formed to include an inlet opening into the interior region, an inner tank layer made of an impermeable barrier material surrounding the interior region and configured to provide means for blocking flow of liquid fuel and fuel vapor therethrough from the interior region to surroundings outside of the fuel tank, and an outer tank layer made of a weldable plastics material compatible and configured to merge with the weldable plastics material of the shell of the valve mount during a welding operation to unite the shell and the outer tank layer to fix the valve mount in a stationary position on the fuel tank, and wherein an aperture formed in the outer tank layer is aligned with an aperture formed in the inner tank layer to define the inlet of the fuel tank, and the shell is positioned to lie in a stationary position relative to the outer tank layer to cause the fuel-vapor blockade insert in the shell to lie in close proximity to the inner tank layer to provide means for minimizing flow of fuel vapor from the fuel tank to the surroundings through a channel that is formed between the fuel-vapor blockade insert and the inner tank layer and that is filled with weldable plastics material included in at least one of the outer tank layer and the shell so that unwanted discharge of fuel vapor from the interior region of the fuel tank to the surroundings past the valve mount is minimized. 
     
     
         3 . The fuel system of  claim 2 , wherein the shell includes a conduit that is formed to include the fuel-delivery channel and an outwardly extending conduit anchor coupled to the conduit and formed to include an annular weld pad that is coupled to the outer tank layer of the fuel tank to support the conduit in the inlet formed in the fuel tank to place the fuel-delivery conduit in fluid communication with the interior region of the fuel tank. 
     
     
         4 . The fuel system of  claim 3 , wherein the fuel-vapor blockade insert includes an upper sleeve, a lower sleeve having a bottom surface, and a disk extending laterally away from the upper sleeve to mate with the lower sleeve, the upper sleeve is disposed in the conduit, the disk and the lower sleeve are disposed in the conduit anchor, and a bottom surface of the lower sleeve cooperates with a top surface of the inner tank layer to define the channel therebetween. 
     
     
         5 . The fuel system of  claim 3 , wherein the conduit of the shell includes an inner end arranged to extend through the inlet of the fuel tank into the interior region of the fuel tank and an outer end arranged to lie outside of the interior region of the fuel tank and in spaced-apart relation to the outer tank layer and adapted to mate with a fuel tank filler neck. 
     
     
         6 . The fuel system of  claim 5 , wherein the conduit anchor of the shell includes a horizontal ring coupled to an exterior surface of the conduit and arranged to surround and extend laterally away from the conduit and a vertical ring coupled to a peripheral portion of the horizontal ring and arranged to surround and lie in spaced-apart relation to a lower portion of the conduit, and a free end of the vertical ring provides the annular weld pad. 
     
     
         7 . The fuel system of  claim 6 , wherein the fuel-vapor blockade insert includes an upper sleeve disposed in the conduit, a lower sleeve disposed in the vertical ring of the conduit anchor, and an annular disk disposed in the horizontal ring of the conduit anchor and arranged to interconnect the upper and lower sleeves. 
     
     
         8 . The fuel system of  claim 2 , wherein the shell includes a vertical ring coupled to the outer tank layer, the fuel-vapor blockade insert includes a lower sleeve having a bottom surface, and the lower sleeve is disposed in the vertical ring to locate the bottom surface in spaced-apart relation to a top surface of the inner tank layer to define the channel therebetween. 
     
     
         9 . The fuel system of  claim 8 , wherein the shell further includes a conduit that is formed to include the fuel-delivery channel and a horizontal ring coupled to an exterior surface of the conduit and an upper portion of the vertical ring and arranged to surround and extend laterally away from the conduit, the horizontal and vertical rings of the shell cooperate to form a conduit anchor arranged and configured to support the conduit in the inlet formed in the fuel tank, and the fuel-vapor blockade insert further includes an upper sleeve disposed in the conduit and a disk disposed in the horizontal ring of the shell and arranged to extend laterally away from the upper sleeve to mate with the lower sleeve. 
     
     
         10 . The fuel system of  claim 9 , wherein the upper sleeve is cylindrical and has a first diameter, the lower sleeve is cylindrical and has a relatively greater diameter, and the disk is annular. 
     
     
         11 . The fuel system of  claim 9 , wherein the conduit of the shell includes an inner end arranged to extend through the inlet of the fuel tank into the interior region of the fuel tank and an outer end arranged to lie outside of the interior region of the fuel tank and in spaced-apart relation to the outer tank layer and adapted to mate with a fuel tank filler neck, and further comprising a lower housing formed to include a flow-discharge passageway and configured to be coupled to the inner end of the conduit to provide guide means for conducting any liquid fuel flowing out of the fuel-delivery channel and into the flow-discharge passageway in a downward direction into the interior region of the fuel tank and toward a floor of the fuel tank. 
     
     
         12 . The fuel system of  claim 11 , wherein the lower housing is made of a plastics material that is different from the weldable plastics material included in the conduit of the shell. 
     
     
         13 . The fuel system of  claim 11 , wherein the lower housing is coupled to the inner end of the conduit by means of a snap-on connector. 
     
     
         14 . The fuel system of  claim 1 , wherein the shell includes a conduit that is formed to include the fuel-delivery channel and an outwardly extending conduit anchor coupled to the conduit and adapted to be coupled to the fuel tank. 
     
     
         15 . The fuel system of  claim 14 , wherein the fuel-vapor blockade insert is disposed in each of the conduit and the conduit anchor. 
     
     
         16 . The fuel system of  claim 15 , wherein the fuel-vapor blockade insert includes an upper sleeve, a lower sleeve, and an annular disk extending laterally away from the upper sleeve to mate with the upper sleeve, the upper sleeve is disposed in the conduit, and the lower sleeve and disk are disposed in the conduit anchor. 
     
     
         17 . The fuel system of  claim 14 , wherein the conduit of the shell includes an outer end adapted to mate with the fuel tank filler neck and an opposite inner end and the conduit anchor includes a horizontal ring coupled to an exterior surface of a middle portion of the conduit located between the inner and outer ends thereof and a vertical ring coupled to a peripheral portion of the horizontal ring and arranged to surround and lie in spaced-apart relation to a lower portion of the conduit located between the middle portion and the inner end of the conduit. 
     
     
         18 . The fuel system of  claim 17 , wherein the fuel-vapor blockade insert is disposed in each of the horizontal ring and the vertical ring of the conduit anchor and in an upper portion of the conduit located between the outer end and the middle portion of the conduit. 
     
     
         19 . A fuel system comprising
 a fuel tank and   a fuel-delivery control unit including a valve mount coupled to the fuel tank and formed to include a fuel-delivery channel and an inlet check valve positioned to lie in the fuel-delivery channel and to regulate flow of liquid fuel through a filler neck into a fuel tank, the valve mount including a fuel-vapor blockade insert made of a material that is impermeable to flow of fuel vapor and encapsulated in a shell, the shell is made of a plastics material that is welded to the fuel tank to retain the valve mount in a stationary position on the fuel tank, the fuel-vapor blockade insert is positioned to lie in close proximity to an impermeable inner tank layer included in the fuel tank to provide means for minimizing flow of fuel vapor from the fuel tank to the surroundings through a channel that is formed between the fuel-vapor blockade insert and the impermeable inner tank layer and filled with weldable plastics material included in an outer tank layer of the fuel tank that is welded to the shell of the valve mount so that unwanted discharge of fuel vapor from the fuel tank to the surroundings past the valve mount is minimized.   
     
     
         20 . A fuel system comprising
 a fuel tank,   a fuel tank filler neck, and   a fuel-delivery control unit including a valve mount and an inlet check valve, the valve mount being coupled to the fuel tank and arranged to extend outwardly in one direction into the fuel tank filler neck and inwardly in an opposite direction into an interior region of the fuel tank through an inlet formed in the fuel tank, the inlet check valve being located in a fuel-delivery channel formed in the valve mount to communicate with the interior region of the fuel tank and configured to close the fuel-delivery channel normally until a sensor included in the inlet check valve is exposed to liquid flowing through the fuel tank filler neck through the fuel-delivery channel toward the interior region of the fuel tank and a fuel-conducting passageway formed in the fuel tank filler neck, wherein the valve mount includes a shell having a conduit providing the fuel-delivery channel and a conduit anchor coupled to the conduit and to the fuel tank to support a lower portion of the conduit in the inlet formed in the fuel tank, the valve mount further including a fuel-vapor blockade insert disposed in the shell, and the fuel tank including an outer tank layer made of a weldable plastics material and coupled to the conduit anchor of the shell and an inner tank layer made of a barrier material impermeable to fuel vapor.