JPH0331720Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fuel sub-tank, and has a structure in which a fuel return pipe is inserted into the sub-tank itself, and the return fuel is discharged into the sub-tank.

(Prior art) It is common to insert the end of a fuel return pipe into the inside of a fuel sub-tank, but conventionally, as shown in Fig. 4, fuel is injected into and out of the inner bottom surface a of the fuel tank at about half the outer circumference. A bracket e with a fuel sub-tank b wrapped around a pipe c and an in-tank pump d inserted into the tank b.
A support arm f into which the end of the fuel return pipe P is inserted is installed in the fuel return pipe P, and most of the fuel sent to the engine by the in-tank pump d is transferred to the fuel return pipe P.
It was designed to be returned to the sub tank by
In order to quickly release air bubbles in the returned fuel upwards, there is an L-shaped bend at the end of the fuel return pipe P that is approximately parallel to the bottom of the sub-tank b, as shown in Figure 5.
Since the pipe is made with p _-a , it is not possible to cut the pipe to an appropriate height and use it, so a return pipe P with an L-shaped bend p _-a at the end is made to match the type of vehicle. I had to.

(Problems to be solved by the invention) Since the mounting structure of the fuel return pipe P and the structure of the return pipe P shown in FIGS. 4 and 5 described in the previous section have a disadvantageous effect on the manufacturing of the vehicle, The present invention has a configuration that allows the fuel return pipe to be inserted into the fuel sub-tank itself, and also has an induction gutter that is equal to the L-shaped bend at the end of the conventional fuel return pipe integrated into the sub-tank. The aim is to develop a configuration that can be cut and connected at height.

(Means for Solving the Problems) The present invention constitutes a means for achieving the object stated in the previous section, and specifically, the insertion vertical hole 2 through which the end of the fuel return pipe P is inserted into the sub-tank body 1.
This fuel sub-tank is characterized in that it is integrally provided with a guide gutter 3 whose lower end of the vertical insertion hole is an upstream end and whose downstream end is open toward the inside of the sub-tank body 1.

A preferred embodiment of the invention is described in the following section.

(Example) FIG. 1 of the accompanying drawings is a plan view, FIG. 2 is an enlarged perspective view of essential parts, and FIG. 3 is a sectional view taken along the line A--A in FIG. 1.

Reference numeral 1 denotes a sub-tank main body, and the upper part of one side wall thereof is bulged outward to form a vertical insertion hole 2 with a circular cross section into which the end of the fuel return pipe P is inserted, and the vertical insertion hole 2 communicates with the vertical insertion hole. Then, a guide gutter 3 is provided, with the upstream end 4 being the lower end of the vertical hole 2 and the downstream end 5 being about 1/3 to 1/2 of the length of the sub-tank main body 1. The inside of the guide shelf 6 is formed as a downstream edge 7 which is open toward the inside of the sub-tank body, and the above is formed integrally with the sub-tank body 1.

Reference numeral 8 denotes a fuel inlet/outlet pipe which is diagonally connected to the vertical insertion hole 2 and protrudes inward from the side of the sub-tank body 1, and extends approximately half way around the outer circumference of the sub-tank body, as in the conventional case. establish.

Additionally, 9 is a bracket to which an in-tank pump 10 is attached.

(Function) The present invention has the above-mentioned configuration, and the end of the fuel return pipe P is inserted and connected to the insertion vertical hole 2 of the sub-tank body 1 fixed to the internal bottom of the fuel tank as shown in Fig. 3 to guide the return fuel. The fuel is diverted to the gutter 3 and discharged into the sub-tank body 1, and the flow of the return fuel is as shown by the arrows in FIG. The fuel return pipe P does not need to have an L-shaped bend at its end, but is cut at a height suitable for insertion into the vertical insertion hole 2 from above, and the insertion connection described above is performed.

(Effects) This invention integrates the vertical insertion hole 2 for inserting the end of the fuel return pipe P into the sub-tank body 1, and the induction gutter 3 for converting the return fuel flow into a nearly horizontal flow and discharging it into the sub-tank body 1. The vertically hanging end of the fuel return pipe P can be cut at an appropriate height for use, which simplifies the connection of the fuel return pipe P and also improves the function of the sub-tank itself. Since it does not change anything, it is easy to manufacture and has the effect of improving the internal integrity of the fuel tank.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, where Figure 1 is a plan view, Figure 2 is an enlarged perspective view of the main part, and Figure 3 is an enlarged perspective view of the main part.
The figure is a sectional view taken along the line A-A in FIG. 1. Figure 4 is a plan view of the conventional structure, Figure 5 is the fuel return pipe P
FIG. 1... Sub-tank body, 2... Vertical insertion hole, 3...
...Induction gutter, P...Fuel return pipe.

Claims (1)

[Scope of utility model registration request] An insertion vertical hole 2 through which the end of the fuel return pipe P is inserted into the sub-tank body 1, and a guide gutter 3 whose lower end is the upstream end and whose downstream end is open toward the inside of the sub-tank body 1 are integrated. A fuel sub-tank is provided.