Refueling assembly including a flow guide
A refueling assembly of an engine is provided. The refueling assembly includes a housing, a door positioned within the housing and a flow guide positioned within the housing and downstream of the door including an inlet in fluidic communication with the door, an outlet to flow fuel into a downstream filler pipe in fluidic communication with a fuel tank during a refueling operation, a planar nozzle seating section receiving a fuel nozzle during the refueling operation, and a contraction section positioned downstream of the planar nozzle seating section.
1. A refueling assembly of an engine comprising:
an external housing;
a door positioned within the external housing; and
a flow guide positioned within the external housing and downstream of the door, the flow guide including an inlet in fluidic communication with the door; an outlet to flow fuel into a downstream filler pipe in fluidic communication with a fuel tank during a refueling operation; a nozzle seating section receiving a fuel nozzle during the refueling operation, the nozzle seating section including a planar surface which tapers in a downstream direction and is parallel to a central axis of the flow guide; and a contraction section positioned downstream of the planar surface,
the flow guide further including an extension section having a substantially constant diameter positioned downstream of the contraction section.
2. The refueling assembly of claim 1 , further comprising an additional door positioned upstream of the door.
3. The refueling assembly of claim 1 , where the flow guide is coupled to an internal housing of the refueling assembly.
4. The refueling assembly of claim 1 , further comprising a preloaded spring coupled to the door providing a return force to the door when opened.
5. A refueling assembly of an engine comprising:
a nozzle stop actuator sized to allow a standard fuel nozzle to open a door, the door positioned downstream of the nozzle stop actuator; and
a flow guide comprising a nozzle seating section positioned downstream of the nozzle stop actuator and including a planar surface which tapers in a downstream direction, the nozzle seating section receiving the fuel nozzle during a refueling operation; a contraction section positioned downstream of the nozzle seating section; and an extension section downstream of the contraction section that leads to an outlet of the flow guide into a downstream filler pipe, a central axis of the flow guide parallel to the planar surface of the nozzle seating section, the extension section having a substantially constant diameter.
6. The refueling assembly of claim 5 , wherein an inner diameter of an outlet of the extension section is between 20 and 25 mm.
7. The refueling assembly of claim 5 , wherein the nozzle stop actuator inhibits a non-standard size fuel nozzle from opening the door.
8. The refueling assembly of claim 5 , further comprising an additional door upstream of the door that automatically closes without assistance from a refueling operator.