JPH0683442U - Fuel tank for automobile - Google Patents

Abstract

(57) [Summary] [Purpose] To achieve both shortening of the projection length of the filler tube in the tank and direct fuel supply to the swirl tank. [Structure] A checker valve 4 is configured by pivotally supporting a flapper valve body 5 on a lower edge of a projecting end portion of a filler tube 3 in a tank body 1, and a check valve 4 is formed on an inner surface of the flapper valve body 5 along a fuel outflow direction. A recess 10 is formed. At the free end of the flapper valve body 5, a gutter member 12 that rotates from a folded position along the filler tube 3 to a deployed position above the swirl tank 2 is mounted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fuel tank for automobiles, and more particularly to a fuel tank for automobiles in which a swirling tank is arranged at the bottom of the tank body.

[0002]

[Prior art]

 In a fuel tank for an automobile, a swirl tank having an open upper portion is arranged in the center of the bottom of the tank body, as shown in, for example, Japanese Patent Laid-Open No. 63-227949. By sucking in, even when the vehicle is turning when the remaining amount of fuel in the tank body is low, the amount of fuel in the suction portion is secured so that the fuel supply to the engine is not hindered.

Further, a refueling means is provided in the swirl tank so that the return fuel and the fuel in the tank main body are replenished, and the fuel flowing out from the filler tube at the time of refueling the fuel is directly supplied to the swirl tank. In order to receive it, the open end of the filler tube inside the tank is located above the swirling tank.

[0004]

[Problems to be solved by the device]

 The swirl tank is provided approximately at the center of the bottom of the tank body to secure the fuel for turning the vehicle as described above.Therefore, in order to arrange the open end of the filler tube above the swirl tank, However, it is necessary to increase the length of protrusion of the filler tube in the tank, which is disadvantageous not only in cost and weight but also in layout.

In view of the above, the present invention allows a vehicle to directly feed fuel into a swirl tank disposed in the center of the bottom of the tank body when refueling fuel without increasing the length of protrusion of the filler tube in the tank. A fuel tank for a vehicle is provided.

[0006]

[Means for Solving the Problems]

 In a fuel tank in which a swirl tank with an open top is located approximately in the center of the bottom of the tank body, the end of the filler tube protruding upward in the tank body is attached to the lower end of the end of the filler tube. A check valve consisting of a flapper valve body that is urged by a spring in the valve closing direction to open due to the outflow pressure of the fuel supply fuel, and a stopper that restricts the flapper valve body to fully open over approximately the extension of the filler tube. And a recess is formed on the inner surface of the flapper valve body along the outflow direction of the fuel supply fuel, and it is folded along the filler tube at the free end of the flapper valve body by the biasing force of the spring. When the filler tube valve element is fully opened, it receives fuel pressure that flows out along the recess of the flapper valve element, develops in a substantially straight line with the flapper valve element and extends above the swirling tank, and the fuel flows into the swirling tank. The outflow guide to the gutter member is provided rotatably.

[0007]

[Action]

 When refueling fuel flowing down the filler tube at the time of refueling reaches the flapper valve body of the check valve, the flapper valve body receives fuel pressure and opens to a position regulated by a stopper, and at the same time, the free end of the flapper valve body. The gutter member of is deployed in front of the end of the filler tube.

Due to the opening of the flapper valve body, the refueling fuel flows out along the concave portion of the flapper valve body, and the front gutter member receives this fuel pressure to rotate and deploy in a substantially straight line with the flapper valve body, It extends above the swirl tank to guide the fueled fuel outflow to the swirl tank.

When the fuel supply is completed, the flapper valve body is closed by the spring force of the spring, and the gutter member is also rotated by the spring force of the spring to the folding position along the filler tube.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a tank main body, and a swirling tank 2 having an open upper portion is provided at a substantially central portion of a bottom portion thereof.

Reference numeral 3 denotes a filler tube, the tip of which is arranged so as to slightly project to the upper side in the tank body 1.

Reference numeral 4 denotes a check valve provided at the protruding end of the filler tube 3 in the tank, for preventing blowback when refueling fuel and preventing fuel from flowing out when the vehicle falls.

The check valve 4 includes a flapper valve body 5 rotatably supported by a pin 8 on a lower edge of an end portion of a filler tube 3 via brackets 6 and 7, and a flapper valve body 5 wound around the pin 8 to provide a flap. The flapper valve body 5 is provided with a spring 9 for urging the upper valve body 5 in the valve closing direction, and the flapper valve body 5 receives the fuel pressure during refueling, so that the flapper valve body 5 resists the spring force of the spring 9 and the pin 8 The flapper valve body 5 is provided with a recess 10 formed in the inner side surface of the flapper valve body 5 along the fuel outflow direction.

In this embodiment, the central portion of the flapper valve body 5 is entirely embossed to form an arc-shaped recess 10.

Further, the bracket 6 is integrally formed with a stopper 11 projecting forward of the end of the filler tube 3, and the stopper 11 serves to prevent the flapper valve body 5 from being fully opened. The opening degree is regulated substantially on the extension of 3.

Then, when the fuel is refueled, the flapper valve body 5 is extended to above the swirl tank 2 at the time of full opening of the flapper valve body 5 at the time of refueling. The member 12 is attached.

The gutter member 12 is formed in an arc-shaped cross-section like the recess 10 of the flapper valve body 5, and when the flapper valve body 5 is deployed from the free end to a substantially linear shape as will be described later, the tip end portion thereof turns. It is formed to a length located above the tank 2.

The gutter member 12 is rotatably connected to a bracket 13 protruding from the free end of the flapper valve body 5 by a pin 15 via a bracket 14 and a spring 16 wound around the pin 15. The turning force is urged upward by.

Further, when the gutter member 12 is deployed at the tip of the bracket 14, it comes into contact with the back surface of the flapper valve body 5 and restricts rotation at a position substantially linear with the flapper valve body 5. 1 stopper 17 is formed, and the molded base portion of the bracket 14 is engaged with the bracket 13 on the flapper valve body 5 side or the edge portion of the flapper valve body 5 so that the gutter member 12 formed by the spring 16 is engaged. A second stopper 18 is formed to restrict the upward turning position to a position substantially perpendicular to the flapper valve body 5.

According to the above-described structure of the embodiment, as shown in FIG. 4, when the refueling gun 19 is inserted into the refueling port 3 a of the filler tube 3 to refuel, the refueling fuel is the flapper valve body of the check valve 4. When the fuel pressure reaches 5, the flapper valve body 5 is opened by the fuel pressure to a position controlled by the stopper 11.

Therefore, the gutter member 12 at the free end of the flapper valve body 5 moves away from the folding position along the filler tube 3 due to the opening movement of the flapper valve body 5 and moves forward from the end of the filler tube 3 to the flapper valve body 5. Of the flapper valve body 5, the first stopper 17 abuts against the back surface of the flapper valve body 5 under the pressure of the fuel oil flowing out along the recess 10 of the flapper valve body 5. The gutter member 12 is rotated and deployed to a position where the gutter member 12 and the flapper valve body 5 are in a substantially linear state.

As a result, the tip of the gutter member 12 extends to a position above the swirl tank 2, and the fuel oil can be guided from the tip to the swirl tank 2.

When the fuel supply is completed, the flapper valve body 5 is closed by the spring force of the spring 9, and the gutter member 12 is also rotated by the spring force of the spring 16 to the folding position along the filler tube 3.

[0025]

[Effect of device]

 As described above, according to the present invention, at the time of fuel refueling, the flapper valve body of the check valve opens approximately above the filler tube from the lower edge of the end of the filler tube, and the recessed portion on the inner surface of the flapper valve body opens The flapper valve body itself can be effectively used as a gutter member by performing an outflow guide, and the gutter member at the free end of the flapper valve body is rotated and expanded substantially linearly with the flapper valve body, and the tip thereof is Since the part can be located above the swirl tank, the fuel can be reliably fed directly into the swirl tank.

Therefore, the protrusion length of the filler tube in the tank can be shortened as much as possible, which is advantageous in terms of cost and weight and increases the freedom of layout of the filler tube. You can

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of the same embodiment in an assembled state.

FIG. 3 is a perspective view of the same embodiment in a deployment operation state.

FIG. 4 is a schematic explanatory view showing the operating state of the embodiment in stages.

[Explanation of symbols]

 1 ... Tank body 2 ... Swivel tank 3 ... Filler tube 4 ... Check valve 5 ... Flapper valve body 9 ... Spring 10 ... Recess 11 ... Stopper 12 ... Gutter member

Claims (1)

[Scope of utility model registration request] 1. In a fuel tank in which a swirl tank having an open upper portion is arranged at a substantially central portion of a bottom portion in a tank body, at an end portion of a filler tube protruding to an upper portion in the tank body,
A check valve consisting of a flapper valve body which is biased by a spring in a valve closing direction and opened by the outflow pressure of refueling fuel with a shaft fulcrum at the lower edge of the filler tube, and the flapper valve body is extended substantially from the filler tube. A stopper for restricting full opening is provided on the upper side, a recess is formed on the inner side surface of the flapper valve body along the outflow direction of the fuel supply fuel, and a freer end of the flapper valve body is provided with a filler tube by a biasing force of a spring. When the flapper valve body is fully opened, it receives the fuel pressure that flows out along the concave portion of the flapper valve body when it is fully opened, and it develops in a substantially straight line with the flapper valve body and extends above the swirling tank to the swirling tank. A fuel tank for an automobile, characterized in that a gutter member for guiding outflow of fuel oil is rotatably provided.