JPS60156964A - Structure of fuel supply pipe - Google Patents

Abstract

PURPOSE:To restrain fuel in a fuel supply pipe for a fuel tank from scattering, and as well to stop a fuel-filler with the fuel tank being every time full, by providing a rectifier which projects toward the center of the supply pipe and extends axially of the supply pipe, in the inside of the fuel supply pipe in the vicinity of the filling port thereof. CONSTITUTION:A cylindrical member 16 is fitted in the inside of a fuel supply pipe 12, in the vicinity of the filling port 15 thereof which is attached to a fuel tank 1. A plurality of rectifying members 17 which project the center of the fuel supply pipe 12 and extends axially of the fuel pipe, are attached to the inside of the fuel supply pipe 12. With this arrangement even if the nozzle section 4b of a fuel filler 4 is inserted into the filling port 15 to fill fuel, the fuel is rectified by the rectifying members 7 so that the scatter of fuel is reduced, thereby it is possible to prevent the fuel supply from being ceased due to that a detector 6 actuates before the tank 1 becomes full.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a fuel supply pipe structure that guides fuel to a fuel tank during refueling.

Furthermore, examples of conventional fuel supply pipe structures of this type include the one shown in Figure 1 described in Japanese Utility Model Application No. 57-31224, or the one shown in Figure 2 described in Japanese Utility Model Application Publication No. 57-10921. The following has been proposed.

In the fuel supply pipe structure shown in FIG. 1, a fuel supply pipe 2 attached to a fuel tank 1 has a reservoir portion 5 facing a discharge port 4a of a fuel injector 4 inserted from an inlet 3 of the fuel supply pipe 2. A bulge is formed. As a result, the fuel from the discharge port 4a of the fuel injector 4 is discharged into the bulging portion 5, and smoothly flows into the fuel tank 1 without generating large turbulence.

However, in such a fuel supply pipe structure,
The insertion state of the fuel injector 4 differs depending on the time of refueling, and it is sufficient if it is inserted as shown by the solid line in the figure, but if it is inserted as shown by the two-dot chain line, the discharge port 4a The fuel released from the tank directly hits the vertical wall 2a of the fuel supply pipe 2 and scatters, causing turbulence and flow throughout the pipe. For this reason, the splashed fuel may hit the detection part 6 of the fuel injector 4 and activate the refueling stop mechanism, causing the fuel injector 4 to stop even though the fuel tank 1 is not full.
There are problems in that the tank may not be full even after finishing the refueling operation thinking that the tank is full, and the refueling operation is troublesome when operating the fuel injector 4 again to refill the tank. .

On the other hand, the fuel supply pipe structure shown in FIG.
A fuel guide 10 formed in the shape of a spiral blade is disposed, and similarly to the above, the fuel guide 10 is arranged so that the fuel flows through the vertical wall 2.
There is a problem in that the fuel injector 4 will stop due to splashing when it hits point a.

Misara Toyotansen This invention was made by paying attention to such conventional problems, and suppresses the occurrence of turbulent flow in the fuel supply pipe, that is, the scattering of fuel, and prevents the fuel injector from stopping during fuel supply. The purpose of the present invention is to provide a fuel supply pipe structure in which the fuel injector always stops when the tank is full.

In order to achieve this objective, the fuel/N refueling pipe structure of the present invention has the following features:
It is characterized by a plurality of rectifying sections protruding toward the center of the fuel supply pipe and substantially along the axial direction of the fuel supply pipe being provided inside the fuel supply pipe near the inlet, and these rectification sections rectify the fuel. This prevents the fuel injector from stopping midway through refueling due to splattered fuel.

Lost seed Hereinafter, the present invention will be explained based on examples.

FIGS. 3 to 5 are diagrams showing an embodiment of the present invention.

First, the configuration will be described. Reference numeral 1 in the figure is a fuel tank, and one end 13 of a fuel supply pipe 12 is attached to this tank 1. This fuel supply pipe 12 is bent upward so that the other end 14 is located at a higher position than the one end 13, and is disposed such that the injection port 15 at the other end 14 faces outside the vehicle. Of course, a filler cap (not shown) is attached to the injection port 15.

A substantially cylindrical flow regulating member 16 is fitted into the interior of the oil supply pipe 12 near the injection port 15 . The flow regulating member 16 is formed, for example, by extrusion molding of a resin material or the like. Of course, it can also be made of metal, rubber, or other materials. Inside the flow regulating member 16, a plurality of flow regulating portions 17 are provided which protrude toward the center of the flow regulating member 6, that is, toward the center of the oil supply pipe 12, and extend substantially along the axial direction of the flow regulating member 16, that is, the axial direction of the oil supply pipe 12. There is.

Next, the operation of the fuel supply pipe structure having such a configuration will be explained. First, the filler cap is removed from the injection port 15, and the nozzle portion 4b of the fuel injector 4 is inserted into the fuel supply pipe 12 from the injection port 15 (see FIG. 3).

At this time, since the rectifying part 17 is substantially along the axial direction of the oil supply pipe 12, it can be inserted smoothly. In this state, the peripheral edge of the discharge port 48 of the nozzle portion 4b comes into contact with the flow regulating portion F of the flow regulating member 16, and the nozzle portion 4b
The base end side of the fuel injector 4 contacts the peripheral edge of the fuel inlet 15.
will be retained.

After that, when the fuel injector 4 is operated to discharge fuel from the discharge port 4a, this fuel is rectified by the plurality of rectifiers 17, and the scattering is reduced compared to the conventional method, and the fuel injector 4 stops midway through refueling. The fuel tank 1 is filled up without any trouble. That is, in FIG. 4, for example, if we pay attention to the flow of fuel in the gap A between two adjacent rectifiers 17, the fuel B discharged perpendicularly to the cylindrical portion 18 of the rectifier 16 will flow through the cylindrical portion 18. It bounces back in the opposite direction.

On the other hand, the fuel C discharged obliquely to the cylindrical part 18 bounces off the cylindrical part 18 and then bounces back again on the rectifier part F.
The water flows downward through the gap A of the rectifier 17 without looking back to the adjacent gap. Therefore, the fuel that bounced off the gap A and the fuel that bounced off the gap do not promote each other, and even if small turbulence occurs in the gap A, for example,
Turbulent flow does not occur within the oil regulating member 16, that is, within the entire oil supply pipe 12. Therefore, the splashed fuel does not hit detection #6 of the fuel injector 4, and the refueling stop mechanism does not operate and the fuel injector 4
continues refueling without stopping during refueling. In addition, since turbulence does not occur, the flow is good and refueling performance is improved, and it is also effective in preventing fuel blowback.
By preventing turbulence, that is, preventing foaming, it is also possible to suppress the occurrence of hexa.

When the fuel tank 1 is full and fuel has accumulated up to the position of the detection part 6 of the fuel injector 4 in the fuel supply pipe 12, the detection part 6 detects this fuel and the refueling stop mechanism is activated to stop fuel injection. The oil supply by the device 4 is stopped.

If refueling is performed in this manner, the refueling operation can be performed easily without having to finish refueling before the fuel tank 1 is full or restarting the fuel injector 4 that has stopped midway. There is a roar as fuel tank 1 is filled up.

By the way, since the flow regulating member 16 of this embodiment is fitted into the oil supply pipe 12, it can also be used in common with another oil supply pipe if the pipe diameter of the oil supply pipe 12 is the same as shown in FIG.

Further, as another embodiment of the present invention, there is one shown in FIG. 6 or FIG. 7. In the fuel supply pipe structure shown in FIG. 6, a cylindrical rectifying member 21 having a circumferential wall bent in a corrugated manner is fitted inside a fuel supply pipe 12 similar to that of the previous embodiment. A portion of this rectifying member 21 that protrudes inward serves as a rectifying portion 22 corresponding to the aforementioned rectifying portion 17 . On the other hand, in the fuel supply pipe structure shown in FIG. 7, a predetermined position of the fuel supply pipe 24 is embossed toward the inside, and a portion projecting inward due to the embossment is a flow straightening section 25 corresponding to the flow straightening section 17 of the above embodiment. It has become.

The operations of these other embodiments are the same as those of the previous embodiment, and therefore the description thereof will be omitted.

As in the above-mentioned embodiments, the flow straightening section according to the present invention can be formed in the oil supply pipe itself as shown in FIG. It can also be installed inside the oil supply pipe by attaching it.

As explained above, according to the present invention, by providing a rectifier in the fuel supply pipe, the fuel discharged from the fuel injector can be rectified, and the occurrence of turbulence can be suppressed. . Therefore, the fuel injector will not stop when the fuel tank is not full, and the tank will always be full when the fuel injector is stopped. This has the effect that it is possible to improve the efficiency of refueling work (e.g.

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views showing different conventional examples, FIGS. 3 to 5 are views showing an embodiment of the fuel supply pipe structure of the present invention, and FIG. 4 is a sectional view taken along the line IV-■ of FIG. 3, FIG. 5 is a perspective view showing the rectifying member, and FIGS.
The figures are sectional views showing other different embodiments. 1...Fuel tank, 12.24...Refueling pipe, 15.
... Inlet, 17,22.25... Rectifier. Figure 1 Figure 3 Figure 4 Figure 6 Figure 5 Figures 1 to 7

Claims (1)

[Claims] A fuel supply pipe structure characterized in that a plurality of rectifiers are provided inside a fuel supply pipe attached to a fuel tank in the vicinity of an inlet thereof, protruding toward the center of the fuel supply pipe and substantially along the axial direction of the fuel supply pipe. .