JP2551889Y2 - Fuel removal structure of fuel tank - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel take-out structure for a fuel tank used in a vehicle such as an automobile. In particular, even when the vehicle leans or turns when the fuel level is low, there is no gas suction, and the fuel is stably supplied to the engine. About.

[0002]

2. Description of the Related Art Even when a fuel tank is tilted, it is necessary to supply fuel to an engine stably, that is, continuously. One way to do this is to provide a sub-tank at the bottom of the fuel tank, as seen in Japanese Utility Model Laid-Open No. 2-7355. As another method, a fuel outlet is provided in the front-rear direction of the tank bottom as described in Japanese Patent Application Laid-Open No. 1-178021, and even when the tank is tilted, the fuel is taken out only from the fuel inlet. The use of the sub-tank has the advantage that the influence of the inclination of the fuel tank is reduced and the waving of the liquid surface can be reduced, but there is a drawback that a relatively large amount of inactive residual fuel must be set. On the other hand, the latter method has an advantage that the amount of inactive residual fuel can be set to a relatively small amount, but there is a possibility that gas may be sucked in due to a shock wave of the liquid surface.

A switching valve structure is disclosed in US Pat. No. 4,878,511. However, since the switching valve structure uses a ball only in a direction in which the valve is closed, the operation in the opening direction is not reliable. Further, since the gas sucked into the valve is not discharged out of the valve, there is a high possibility that the gas is sent to the engine.

[0004]

[Problems to be Solved by the Invention] The present invention eliminates gas suction due to the waving of the liquid surface when the fuel tank is tilted,
It is an object of the present invention to continuously supply stable fuel to an engine and to reduce ineffective fuel residue in a tank.

[0005]

Means for Solving the Problems The present invention solves the above problems by:
The solution was as follows. That is, a fuel feed pipe 2 having an opening near the bottom in a sealed casing 1 and a lever 3 having a fulcrum at a substantially center in the casing 1.
And the valve bodies 4, 4 at both ends of the lever 3 and an outlet for opening the fuel intake at a location where fuel is stored when the fuel tank 10 is inclined, and an outlet which is combined with the valve body to form a valve section at the bottom in the casing. A fuel take-out pipe 5 having an open end and a ball 6 provided between the lever 3 and the bottom of the casing so as to roll due to the inclination of the tank are arranged. A fuel take-out structure for a fuel tank, characterized in that it is widened toward the center of the casing so that a valve portion on the side opposite to the side where the tank is inclined is closed.

[0006]

With such a structure, since the pipeline is cut off in the casing, even if gas is sucked in at the open end of the fuel suction, the gas and liquid are separated in the casing, and as in the conventional example, Do not go directly to the engine. In addition, regardless of the inclination of the tank in either the left or right direction, the ball 6 rolls to the lower side, so that the outlet opening end of the lower fuel outlet pipe is separated from the valve body, and the valve is opened. The outlet opening end of the fuel cell is closed by the valve body, and the fuel is always sucked in from the side where fuel is stored.

[0007]

FIG. 1 is a sectional view corresponding to AA in FIG. 3 showing a fuel take-out structure of a fuel tank of the present invention in a normal position, and FIG. 2 is a sectional view corresponding to AA when the fuel tank is inclined. 3 is FIG.
FIG. 4 is a cross-sectional view corresponding to C-C in FIG. 3. FIG. 5 is a side view showing a mounting structure of the valve element.

As can be seen in these figures, there is a fuel oil supply pipe 2 which is open from the upper part of the fuel tank 10 to the vicinity of the bottom of the inner casing of the fuel tank 10 with respect to the casing 1 which is sealed in a cylindrical shape. The part is surrounded by a filter 8. At the approximate center of the casing 1, there is provided a lever 3 in which the respective ends of the columnar piece standing upright from the casing bottom and the columnar piece hanging down from the casing ceiling are fitted, and a fulcrum 3a is rotatably provided at the joint. At both ends of the lever 3, valve bodies 4, 4 having a closed tapered surface on the lower surface, and a horizontal shaft 4a protruding to both sides of the valve body 4 so as to always be vertically oriented as shown in FIG. It is pivotally supported by the lever end bearing 3b. The valve element 4 always moves by a valve element guide 9 standing upright from the bottom of the casing. At the bottom of the fuel tank 10, fuel extraction pipes 5, 5 are provided on both sides from the casing 1. The fuel take-out pipe 5 has a fuel suction opening end 5a at a place where fuel is stored when the tank is tilted,
It has an outlet open end 5b at the bottom in the casing, which is combined with said valve body 4 to form a valve part. A ball 6 is provided between the lever 3 and the bottom of the casing so as to roll due to the inclination of the tank. Formed wide toward the center of the casing. A check valve 7 is provided on the ceiling surface of the casing so that the inside of the casing is kept closed when the engine is operating, and when the engine is stopped, gas that is lower than the liquid level flows out of the casing. I have.

[0009]

[Effect of the Invention] Even when the vehicle leans or turns when the fuel is low, gas is not sucked and the fuel can be stably supplied to the engine. In addition, the amount of inactive remaining fuel is as small as possible, and it also functions as a sub tank.
A fuel filter is usually installed at the fuel intake port,
Even if it is not attached separately at two places as in No. 92
Can be attached to the place.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view corresponding to AA in FIG. 3 showing a fuel take-out structure of a fuel tank of the present invention in a normal position.

FIG. 2 is a sectional view corresponding to AA when the fuel tank is inclined.

FIG. 3 is a sectional view corresponding to line BB in FIG. 1;

FIG. 4 is a cross-sectional view corresponding to CC in FIG. 3;

FIG. 5 is a side view showing a mounting structure of a valve body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Fuel oil pipe 3 Lever 3a Support 4 Valve body 5 Fuel removal pipe 6 Ball 7 Check valve 8 Filter

Claims (1)

(57) [Scope of request for utility model registration] 1. A fuel supply pipe 2 having an opening near a bottom in a sealed casing 1, a lever 3 having a fulcrum substantially in the center of the casing 1, and valve bodies 4 at both ends of the lever 3.
A fuel extraction pipe 5 having an open end for fuel suction at a location where fuel is stored when the fuel tank 10 is tilted and an outlet open end formed at the bottom in the casing to be combined with a valve body to form a valve portion; A ball 6 provided so as to roll by the inclination of the tank is disposed between the casing 3 and the bottom of the casing.
And a gap between the bottom of the casing and the bottom of the casing is widened toward the center of the casing such that the valve on the side opposite to the side where the fuel tank is inclined is closed by rolling of the ball 6.