FIELD OF THE INVENTION
The invention relates to fuel supply systems for automobile vehicles and, more particularly, to hose connection at an auxiliary side of a duel chamber fuel tank.
BACKGROUND OF THE INVENTION
With reference to FIG. 1, a typical fuel system is shown gen erally indicated at 10, for a vehicle having a dual chamber or saddle type fuel tank 12. The tank 12 includes a primary tank portion 13a and an auxiliary tank portion 13b. The fuel tank 12 has a bottom wall 14 with a hump 17 formed therein near a center thereof that extends upwardly. The hump 17 thus separates the tank portions 13a and 13b and accommodates the passing of a drive shaft (not shown) in the conventional manner. A fuel pump 18 is disposed in the primary tank portion 13a of the fuel tank 12 to pump fuel therefrom. A first jet pump 20 is also disposed in the primary tank portion 13a of the fuel tank 12 and is fluidly connected to the fuel pump 18. A second or transfer jet pump 22 is disposed in the auxiliary tank portion 13b and is fluidly connected to a pressure relief valve 24. The fuel system 10 also includes a fuel rail 26 fluidly connected to the fuel pump 18 to distribute fuel to an engine (not shown) of the vehicle. A plurality of fuel injectors 28 are connected to the engine and are fluidly connected to the fuel rail 26 to inject fuel into the engine. In operation, liquid fuel in the fuel tank 12 is pumped by the fuel pump 18 to the fuel rail 26 and fuel injectors 28 into the engine. The first jet pump 20 is used to keep a reservoir 29 filled with fuel and is connected to a constant feed from the fuel pump 18. The second jet pump 22 is driven with pressurized fuel provided by the fuel pump 18 so the jet pump is on continuously to supply fuel.
With these dual jet pump system, there is a significant increase in the number of components and plumbing required. Thus, these systems are quite complicated and certain systems employ expensive quick-connect connectors.
There is a need to provide an improved hose connection for an auxiliary tank portion of a fuel tank.
SUMMARY OF THE INVENTION
An object of the invention is to fulfill the need referred to above. In accordance with the principles of the present invention, this objective is obtained by providing a hose connection having mounting structure and suction structure. The suction structure is mounted to the mounting structure such that the suction structure can rotate with respect to the mounting structure about an axis of the suction structure. The hose connection includes a hose coupled to the suction structure.
In accordance with another aspect of the disclosed embodiment, a fuel supply system includes a fuel tank having a primary portion and an auxiliary portion. A fuel pump assembly is disposed in the primary portion. The fuel pump assembly includes a jet pump. Mounting structure is disposed in the auxiliary portion. Suction structure is mounted to the mounting structure such that the suction structure can rotate with respect to the mounting structure about an axis of the suction structure. A hose is coupled at one end to suction structure and coupled at another end to the jet pump such that fuel in the auxiliary portion of the fuel tank can be drawn by the jet pump through the suction structure and hose to the primary portion of the fuel tank.
Other objects, features and characteristics of the present invention, as well as the methods of operation and the functions of the related elements of the structure, the combination of parts and economics of manufacture will become more apparent upon consideration of the following detailed description and appended claims with reference to the accompanying drawings, all of which form a part of this specification.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood from the following detailed description of the preferred embodiments thereof, taken in conjunction with the accompanying drawings, wherein like reference numerals refer to like parts, in which:
FIG. 1 is a view of conventional saddle-type fuel tank including a fuel pump and first jet pump in a primary tank portion and a secondary jet pump in an auxiliary tank portion.
FIG. 2 is a side view of a housing including mounting structure provided in accordance with an embodiment of the invention.
FIG. 3 is an enlarged exploded view showing suction structure, with hose attached, about to be inserted into the mounted structure of FIG. 2.
FIG. 4 is an enlarged exploded view showing suction structure, without hose attached, about to be inserted into the mounted structure of FIG. 2.
FIG. 5 is a partial sectional view of the suction structure of FIG. 3, with a hose attached, shown fully inserted into the mounting structure in a saddle-type fuel tank.
DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT
With reference to FIG. 2, a housing, generally indicated at 30, is shown in accordance with the principles of an embodiment of the invention. The housing 30 includes mounting structure, generally indicated at 32, near a bottom thereof, the function of which will be explained below. In the embodiment, the mounting structure 32 is molded integrally with the housing 30 out of plastic material suitable for exposure to fuel. In the embodiment, the housing 30 includes a flange 34 that is constructed and arranged to be mounted to a wall of a fuel tank of the type shown in FIG. 1, such that the housing 30 can be disposed in an auxiliary portion of a saddle-type fuel tank. The flange 34 permits electrical wiring to pass into and out of the tank for powering a conventional level sensor 36 mounted to the housing 30.
With reference to FIG. 3, the mounting structure 32 includes a generally cylindrical wall structure 38 having a generally C-shaped configuration with an opened first end 40 and an opened second end 42 that is spaced from the first end 40. A stop surface 44 is provided in the wall structure 38 near the second end 42 to control the location of a suction structure, generally indicated at 46, when inserted into the mounting structure 32, as will be explained more fully below.
As best shown in FIGS. 3 and 5, the suction structure 46 includes a tube member 47 having a barbed fitting 48 at a first open end 45 that receives an end 49 of a hose 26′ (FIG. 4). The other end of the hose 26′ is coupled with the conventional jet pump 70 (FIG. 5) such that fuel can be drawn from an auxiliary portion of a fuel tank to the primary portion of the tank in the conventional manner discussed below. Below the barbed fitting 48, the suction structure 46 includes an annular rim 50 that engages the stop surface 44 of the mounting structure 32 when inserted into the mounting structure 32 (FIG. 5).
Baffle structure 52 surrounds the second open end 54 of the tube member 47. The baffle structure 52 is constructed and arranged to prevent debris in the fuel tank from entering the second open end 54. A portion of the baffle structure 52 has at least one recess 56 defined near the rim 50 that receives locking structure preferably in the form of a tab 58 (FIG. 5) of the mounting structure when inserted into the mounting structure. Thus, the tab 58 in the recess 56 prevents movement of the suction structure 46 along axis B (FIG. 5.) Each tab 58 is provided on a cantilevered arm member 60 that is fixed to the mounting structure 32 at only one end 62 (FIG. 3) thereof.
The suction structure 46 with hose 26′ and the mounting structure 32 define a hose connection, generally indicated at 51. To assemble the hose connection 51, first, with reference to FIG. 5, a fuel pump assembly 68 with jet pump 70 is inserted into a primary portion 66 of a fuel tank 65. The hose 26′, coupled with the jet pump 70, is guided across the hump 72 to the auxiliary portion 63. In the auxiliary portion, the hose 26′ is grabbed and end 49 thereof is connected to the barbed fitting 48 of the suction structure 46. Thus, only one connection for hose 26′ is needed and no quick connection is required.
With reference to FIG. 4, the suction structure 46 with hose 26′ attached is moved upwardly in the direction of arrow A until the annular rim 50 engages the stop surface 44 of the mounting structure 32. The tabs 58 engage the recesses 56 to lock the suction structure 46 with respect to the mounting structure 32 so as to hold the suction structure 46 in place during assembly of the housing 30 into the auxiliary portion of the fuel tank. Although the suction structure 46 is secured to the mounting structure 32, the suction structure 46, with hose 26′ attached, is free to rotate with respect to the mounting structure 32 about axis B (FIG. 5) of the suction structure 46 to avoid twisting forces that may be exerted on the hose 26′.
With reference to FIG. 5, once the housing 30 with attached suction structure 46 and attached hose 26′ is assembled in an auxiliary portion 63 of a fuel tank, the baffles 52 engage a bottom 64 of the auxiliary portion 63 of the fuel tank such that the suction structure 46 cannot move further downwardly and thus is secured within the auxiliary portion 63 of the fuel tank 65.
As shown in FIG. 5 and noted above, in a fuel supply system generally indicated at 67, the primary portion 66 of the fuel tank 65 includes a fuel pump assembly 68 therein. The fuel pump assembly 68 is constructed and arranged to send fuel to a vehicle engine (no shown). The fuel pump assembly 68 includes the jet pump 70. The jet pump 70 creates a vacuum and draws fuel through the hose 26′ from the auxiliary portion 63 to the primary portion 66 of the fuel tank 65.
For electrostatic dissipation, the suction structure 46 and the hose 26′ can be of electrically conductive material and can be discharged to the primary portion 66 (e.g. at the jet pump 70).
Thus, the hose connection of the embodiment, provides a simple way of connecting a hose in an auxiliary portion of a tank to a jet pump in a primary portion of the tank such that the hose connection will not tangle or become disengaged. Conventional quick-connect connectors are not required with the hose connection.
The foregoing preferred embodiments have been shown and described for the purposes of illustrating the structural and functional principles of the present invention, as well as illustrating the methods of employing the preferred embodiments and are subject to change without departing from such principles. Therefore, this invention includes all modifications encompassed within the spirit of the following claims.
Patent Application
20090020162
