JPH07304341A - Turning tub structure of fuel tank - Google Patents

Abstract

PURPOSE:To enable smooth restart of an engine even if a fuel tank tilts when a small amount of fuel remains in the fuel tank. CONSTITUTION:A one-way valve 11 is mounted in a fuel flow-in port 5 of a tub body 2 of a turning tub 1 installed in a fuel tank 6. The one-way valve 11 is opened when return fuel is jetted from a jet nozzle 9, and when the fuel tank 6 is tilted, back flow of fuel from the turning tub 1 into the fuel tank 6 is prevented by the one-way valve 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a swirling tank of a fuel tank for feeding fuel to an engine of a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a swirling tank (1) is disposed inside a tank body (2) installed at the bottom of a fuel tank (6) and inside the tank body (2). A pump (3) at the end of the engine fuel supply path (7), a strainer (4) arranged at the inlet side of the pump (3), and a fuel inlet () provided at the bottom of the tank body (2) 5), and the jet nozzle (9) at the end of the fuel return passage (8) is inserted into the fuel inlet (5). In the above structure, the fuel returned from the jet nozzle (9) is supplied to the tank body through the fuel inlet (5) while the engine is operating.
When injected into the (2), the flow velocity of the return fuel causes the fuel (10) in the fuel tank (6) to flow from the fuel inlet (5) to the tank body (2).
It is inhaled into the tank body (2) and the tank (2) is always filled with fuel.

[0003]

However, when the amount of fuel remaining in the fuel tank (6) is small and the vehicle is tilted to stop and the engine is stopped in that state, the tank body (2 The fuel in () flows back into the fuel tank (6) from the fuel inlet (5), and as a result, the remaining amount of fuel in the tank body (2) becomes insufficient and it is not sucked up by the pump (3) and The fuel may not be supplied and the engine may not be restarted.

[0004]

Means for Solving the Problems As a means for solving the above conventional problems, the present invention provides a tank body (2) installed at the bottom of a fuel tank (6) and a tank body (2) inside the tank body (2). Engine fuel supply path (7) to be placed Pump (3) at the terminal and the tank body
It is composed of a fuel inlet (5) provided in the lower part of (2), and a jet nozzle (9) at the end of the fuel return passage (8) is inserted into the fuel inlet (5). The swirl tank (1) structure of the fuel tank (6) is provided at the inlet (5) with the one-way valve (11) opened by the jet pressure from the jet nozzle (9).

[0005]

[Function] Even if the engine is stopped while the fuel tank (6) is tilted, the fuel in the tank body (2) of the swirling tank (1) is blocked by the one-way valve (11), so that the fuel tank (6) Backflow is blocked. Therefore, the amount of fuel remaining in the tank body (2) is secured, and when the engine is restarted, the fuel supply path is set by the pump (3).
Fuel can be supplied to the engine smoothly from (7). When the return fuel is injected from the jet nozzle (9) during engine operation, the injection pressure causes the one-way valve (11) to open and the fuel (10) in the fuel tank (6) to flow through the fuel inlet (5). Tank
(2) is sucked and the tank (2) is filled with fuel.

[0006]

EXAMPLES The present invention will be described with reference to one example shown in FIGS. 1 to 3. (1) is a swirling tank, and the swirling tank (1) is a tank body.
(2) and an engine fuel supply passage arranged in the tank body (2)
(7) It consists of a terminal pump (3) and a fuel inlet (5) provided at the bottom of the tank body (2), and a strainer (4) is arranged at the inlet side of the pump (3). Has been done. The swirl tank
(1) is installed at the bottom of the fuel tank (6), and the jet nozzle (9) at the end of the fuel return passage (8) is inserted into the fuel inlet (5) of the tank body (2). Further, a one-way valve (11) for introducing fuel in one direction into the tank body (2) is attached inside the fuel inlet port (5).

In the above structure, when the engine is in operation, the fuel (10) in the fuel tank (6) is sucked up into the engine fuel supply passage (7) by the pump (3) through the strainer (4), and the fuel is supplied to the engine (not shown). The supplied and returned fuel is injected from the jet nozzle (9) through the fuel return passage (8), and the one-way valve (11) is opened by the injection pressure, and the fuel tank (6)
The fuel (10) therein is sucked into the tank body (2) from the fuel inlet (5) by the flow velocity of the return fuel injected from the jet nozzle (9), and thus the fuel is always kept in the tank body (2). It is filled. When the vehicle tilts and stops and the fuel tank (6) is tilted as shown in Fig. 3, the fuel in the tank body (2) of the swirling tank (1) is fueled by the one-way valve (11). Since the backflow into the tank (6) is blocked, a sufficient amount of fuel remains in the tank body (2), and when the engine is restarted, it is sucked up from the pump (3) and the fuel supply path (7 ) To the engine.

[0008]

As described above, according to the present invention, when the remaining amount of fuel in the fuel tank is small, the engine can be restarted without any trouble even when the vehicle is tilted and stopped.

[Brief description of drawings]

 1 to 3 show an embodiment of the present invention.

1 is a sectional view of a fuel tank side

FIG. 2 is an enlarged cross-sectional view of a portion near the swirl tank fuel inlet.

FIG. 3 is a side sectional view of the fuel tank in a tilted state.

FIG. 4 is a side sectional view of a fuel tank of a conventional example.

FIG. 5 is a side sectional view of a conventional fuel tank in an inclined state.

[Explanation of symbols]

 1 swirl tank 2 tank body 3 pump 5 fuel inlet 6 fuel tank 7 fuel supply passage 8 fuel return passage 9 jet nozzle 11 one-way valve

Claims (1)

[Claims] 1. A fuel tank comprising a tank body installed at a bottom portion, a pump for an engine fuel supply path terminal arranged in the tank body, and a fuel inlet port provided at a lower portion of the tank body. A swirl tank structure of a fuel tank, characterized in that a jet nozzle of a fuel return path terminal is inserted into the inlet, and a one-way valve opened by the jet pressure from the jet nozzle is attached to the fuel inlet.