Patent Application
20140209209
The present invention relates to a refueling adapter in a fuel delivery system of a vehicle.
Vehicles having internal combustion engines require periodic refueling to enable continued combustion operation in the engine after periods of vehicle use. Vehicles may be equipped with refueling ports to enable refueling nozzles to be inserted into a refueling conduit to enable fuel to be delivered to a fuel tank in the vehicle. However, the refueling port may only be configured to receive certain types of standardized nozzles, to reduce the likelihood of filling the fuel tank with an improper fuel. Specifically, mis-fueling inhibitors may be provided in refueling ports to inhibit nozzles having certain sizes and/or geometries from being inserted into the refueling ports. Consequently, certain refueling ports may only be able to receive a limited number of refueling nozzles, thereby decreasing the refueling port's applicability. For example, the refueling port may not accept nozzles from a fuel can, preventing a vehicle operator from remotely refueling their vehicle.
JP201276754 discloses a refueling funnel for refueling a vehicle from a portable fuel can. The refueling funnel includes a connecting part which spans the diameter of a filler pipe.
The Inventors have recognized several drawbacks with the refueling funnel disclosed in JP201276754. Firstly, the refueling funnel may build up a large amount of electrostatic charge during refueling. The refueling funnel may be particularly susceptible to electrostatic charge build-up when the flowrate of the fuel through the funnel is high. Moreover, the geometry of the funnel may enable a refueling nozzle to seal against the funnel during refueling, further increasing the build-up of electrostatic charge.
As such in one approach a refueling adapter is provided. The refueling adapter includes a nozzle section and an inlet section coupled to and positioned upstream of the nozzle section, the inlet section including a restrictor element extending across an inlet section flow passage and an anti-sealing rib coupled to an inlet section housing and axially extending across the inlet section flow passage.
The restrictor element increases losses in the adapter, thereby decreasing the flowrate of the fuel through the refueling adapter and decreasing electrostatic charge build-up during refueling. Moreover, the anti-sealing rib reduces the likelihood of a nozzle sealing against the housing of the refueling adapter, further reducing the amount of electrostatic charge build up in the refueling adapter during refueling. As a result, the likelihood of an electric discharge occurring in the fuel which may cause a fire and/or explosion is reduced.
In some examples, the refueling adapter may comprise one or more non-conductive material(s), due to the reduction in electrostatic charge build-up. Consequently, the price of the refueling adapter may be reduced when compared to refueling adapter which may comprise costly conductive materials.
It should be understood that the summary above is provided to introduce in simplified form a selection of concepts that are further described in the detailed description. It is not meant to identify key or essential features of the claimed subject matter, the scope of which is defined uniquely by the claims that follow the detailed description. Furthermore, the claimed subject matter is not limited to implementations that solve any disadvantages noted above or in any part of this disclosure.
The present description relates to a refueling adapter which reduces electrostatic charge build-up during refueling through increased losses in the adapter via a restrictor element. A decrease in electrostatic charge build-up during refueling decreases the likelihood of a fire and/or explosion caused by the discharge of the electrostatic charge in the fuel. An anti-sealing rib is also provided in the refueling adapter upstream of the restrictor element. The anti-sealing rib is configured to reduce the likelihood of a nozzle sealing in the adapter, further decreasing electrostatic charge build-up during refueling. The anti sealing rib may also reinforce the flow restrictor so the nozzle user has a reduced chance of breaking the restrictor plate. Due to the decrease in electrostatic charge build-up during refueling the refueling adapter may be constructed out of a non-conductive material, if desired. As a result, the cost of the refueling adapter may be decreased when compared to refueling nozzles constructed out of conductive material.
The fuel delivery system 12 includes a fuel tank 22. The fuel delivery system 12 includes a fuel tank 22 configured to store any suitable fuel such as gasoline, diesel, alcohol (e.g., ethanol and methanol), bio-diesel, etc. A fuel pump 24 including a pick-up tube 26 is in fluidic communication with a fuel volume in the fuel tank 22.
A fuel conduit 28 is coupled to an outlet of the fuel pump 24. The fuel delivery system 12 may further include a fuel filter 29 configured to remove unwanted particulates from the fuel flowing through the fuel delivery system. The fuel conduit 28 is in fluidic communication with a fuel injector 30 coupled directly to the cylinder 18 to provide what is known as direct injection to the engine 14. Additionally or alternatively, a port fuel injector, in the fuel delivery system, positioned upstream of the cylinder 18 may be used to provide fuel to the cylinder 18. It will be appreciated that addition components may be included in the fuel delivery system such as a higher pressure fuel pump 24.
A refueling conduit 40 is also included in the fuel delivery system 12. The refueling conduit 40 is in fluidic communication with the fuel tank 22 and a refueling port 42. The refueling port may include a refueling cap, a refueling door, a refueling inlet, etc. In one example, the refueling port includes a cap-less inlet, in which there is no removable cap but rather a spring-loaded covering of the inlet that moves as a result of insertion of an appropriately sized nozzle and/or an adapter as described herein. Thus, the refueling port 42 may be configured to receive a refueling nozzle. The refueling nozzle may be included in a fuel pump in a vehicle filing station, for example. Additionally, the refueling port 42 may include a mis-fueling inhibitor configured to receive nozzles having only certain sizes or geometries. However, in other examples the mis-fueling inhibitor may not be included in the refueling port 42.
Additionally, the refueling port 42 may be configured to receive a refueling adapter 50. Specifically, the refueling adapter may be removably coupled (e.g., attached and removed from) the refueling port 42, denoted via arrow 52. In this way, a user may attach and remove the refueling adapter 50 when desired. In another example, the refueling adapter 50 may be removably coupled to a fuel canister (e.g., a gas can). In this way, the refueling adapter 50 may be used for refueling different fuel storage containers, thereby increasing the refueling adapter's applicability and enabling the vehicle to be refueled at remote locations.
The refueling adapter 50 is configured to enable nozzles of different sizes and/or geometries to be inserted into the refueling port 42, shown in
The refueling adapter 50 includes an inlet section 204 and a nozzle section 206. The nozzle section 206 may also be referred to as an outlet section. Additionally, the refueling adapter 50 includes a housing 208. The housing 208 may be conceptually divided into a nozzle section housing and an inlet section housing. The housing 208 may define flow passages in the refueling adapter 50 discussed in greater detail herein. Cutting plane 220 defines the cross-section shown in
The housing 208 may be constructed out of a non-conductive material, such as a non-conductive polymeric material (e.g., Polyester, Polypropylene, Polyethylene, Acetal (POM), Acrylonitrile butadiene styrene (ABS), Polycarbonate, Acrylic, Polyphthalamide (PPA), and/or Polyphenylene sulfide (PPS). Thus, the housing 208 may comprise a non-conductive material. The restrictor element 302 may be constructed out of a non-conductive material, such as a non-conductive polymeric material, (e.g., Polyester, Polypropylene, Polyethylene, Acetal (POM), Acrylonitrile butadiene styrene (ABS), Polycarbonate, Acrylic, Polyphthalamide (PPA), and/or Polyphenylene sulfide (PPS). Thus, the restrictor element 302 may comprise a non-conductive material. The anti-sealing rib 300 may be constructed out of a non-conductive material, such as a non-conductive polymeric material, (e.g., Polyester, Polypropylene, Polyethylene, Acetal (POM), Acrylonitrile butadiene styrene (ABS), Polycarbonate, Acrylic, Polyphthalamide (PPA), and/or Polyphenylene sulfide (PPS). Thus, the anti-sealing rib 300 may comprise a non-conductive material. In one example, the refueling adapter 50 may not include a conductive material. In some examples, the housing, anti-sealing rib, and/or restrictor element may comprise different materials. However, in other examples at least two of the housing, anti-sealing rib, and restrictor element may comprise similar material(s).
The anti-sealing rib 300 includes a first portion 304 and a second portion 306. The first portion 304 and the second portion 306 are arranged perpendicular to one another. However, other relative positions of the first portion and the second portion have been contemplated. The first portion 304 extends along and is directly coupled to the inlet section housing. Thus, the first portion radially extends from the housing in an inward direct. As shown, the thickness of the first portion 304 does not vary along its length. However, other anti-sealing rib geometries have been contemplated. For example, the thickness of the first portion 304 may vary along its length. The first portion 304 is parallel to an axis 308 of the nozzle section 206. Additionally, the second portion 306 is radially aligned. A radial axis 320 is also provided for reference.
Thus, the second portion 306 radially extends across the inlet section 204. Specifically, the second portion 306 radially extends across an inlet section flow passage 310. However, other anti-sealing rib geometries have been contemplated.
The housing 208 defines flow passages in the refueling adapter 50. An inlet section flow passage 310 is shown. The boundary of the inlet section flow passage 310 is defined by the inlet section housing 208, the anti-sealing rib 300, and the restrictor element 302. A nozzle section flow passage 312 is also shown in
Furthermore, the restrictor element 302 is shown directly coupled to the anti-sealing rib 300, in
Returning to
Arrow 502 denotes the general flow of fuel from the nozzle 500. Thus, during refueling fuel may flow around the anti-sealing rib 300 and the restrictor element 302 and into the nozzle section flow passage 312. Thus, the restrictor element 302 does not completely block the nozzle section flow passage 312. Impeding the fuel via the restrictor element increases losses in the adapter, thereby decreasing the flowrate of the fuel through the adapter during refueling. It will be appreciated that the fuel may have additional complexity that is not depicted.
As shown, the nozzle 500 is in face sharing contact with the anti-sealing rib 300. The interface between the anti-sealing rib 300 and the nozzle 500 substantially prevents the nozzle from sealing in the refueling adapter 50, thereby reducing the flowrate of fuel and the propensity towards electrostatic charge build-up during refueling in the refueling adapter. Decreasing the electrostatic charge build-up during refueling decreases the likelihood of an electrostatic discharge into the fuel which may cause a fire and/or explosion.
As shown, the anti-sealing rib 300 circumferentially extends around only a portion of the inlet section housing. Moreover, the anti-sealing rib 300 extends in a radial inward direction from a surface of the inlet section housing. Specifically, the anti-sealing rib 300 circumferentially extends 5 degrees or less around the housing 208, in one example. The angle may be selected based on the thickness of the housing.
In some examples, a ratio between the area of the flow impeding surface 600 and an unrestricted flow plane 606 peripheral to the restricted surface area may be selected to achieve a flowrate of ≦1.5 gallons per minute through the refueling adapter during refueling operation. The cross-sectional views illustrate the various openings and free space included in the adapter structure.
At 702 the method includes attaching a refueling adapter to a fuel port. Next at 704 the method includes inhibiting a nozzle from sealing against a housing of the refueling adapter.
At 706 the method includes flowing fuel through the refueling adapter. Next at 708 the method includes reducing the flowrate of the fuel via a restrictor element in the refueling adapter.
Note that the example control routines included herein can be used with various engine and/or vehicle system configurations. The specific routines described herein may represent one or more of any number of processing strategies such as event-driven, interrupt-driven, multi-tasking, multi-threading, and the like. As such, various acts, operations, or functions illustrated may be performed in the sequence illustrated, in parallel, or in some cases omitted. Likewise, the order of processing is not necessarily required to achieve the features and advantages of the example embodiments described herein, but is provided for ease of illustration and description. One or more of the illustrated acts or functions may be repeatedly performed depending on the particular strategy being used.
It will be appreciated that the configurations and routines disclosed herein are exemplary in nature, and that these specific embodiments are not to be considered in a limiting sense, because numerous variations are possible. For example, the above technology can be applied to V-6, I-4, I-6, V-12, opposed 4, and other engine types. Further, one or more of the various system configurations may be used in combination with one or more of the described methods. The subject matter of the present disclosure includes all novel and non-obvious combinations and sub-combinations of the various systems and configurations, and other features, functions, and/or properties disclosed herein.
