JPH0534263Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a fuel flow noise prevention device for a vehicle fuel tank, and the present invention relates to a fuel flow noise prevention device for a vehicle fuel tank. The fuel flow noise is prevented as much as possible by allowing the fuel to float nearby.

(Prior art) The surface of fuel refilled in a vehicle fuel tank becomes rippled due to vibration, acceleration, braking, etc. of the vehicle body, and especially when the amount of fuel is low, the fuel tank tends to ripple violently. Yes, the flowing sound becomes noise.

For this reason, a device for preventing flow noise has been proposed as disclosed in Japanese Utility Model Application Publication No. 46-57711. This device has a structure in which the inside of the fuel tank is divided into upper and lower parts, a floating plate with small holes in several places is floated on the fuel, and a fuel gauge float is placed on top of the floating plate. In addition, as shown in Fig. 4, the lower legs c of several upright noise-prevention partition plates a are attached to the inner bottom surface of the fuel tank e, or to the plate material d that is sunk into the inner bottom surface, and the partition plates a Fuel flow window B
I am using the one that was formed.

The one disclosed in the above publication is not connected to a fixed position on the inner surface of the fuel tank, so it has the disadvantage that a squeak occurs between the fuel tank and the inner surface, causing other noise. Since the legs c of the partition plate a are erected on the internal bottom of the fuel tank e or on the plate material d attached to the internal bottom, it is possible to suppress the flow of fuel that occurs in the vertical direction of the partition plate a, but it is possible to suppress the flow of fuel that occurs in the parallel direction. It is not very possible to suppress the flow of fuel that occurs. However, the noise inside the fuel tank is caused by the wave motion of the fuel liquid level, so
As mentioned above, a sufficient effect cannot be achieved by the partition plate a which cannot suppress the liquid level.

(Problem to be solved by the invention) This invention suppresses the fuel flow noise in the fuel tank by suppressing the fuel liquid level with a fuel holding plate moored to the fuel tank, regardless of whether the amount of fuel filled is large or small. The purpose is to suppress waves.

(Means for Solving the Problems) In order to achieve the object stated in the previous section, the present invention protrudes from the mounting portion 6 a connecting piece 4 that can be freely bent in the vertical direction by means of a joint 5, and the connecting piece 4 protrudes. A joint 3 at the end connects the fuel holding plate 1 so that it can bend freely in the vertical direction, and the connecting piece 4 and the fuel holding plate 1 are made to have a length that allows them to float on the liquid surface when they are approximately horizontal.
A fuel flow noise prevention device for a fuel tank for a vehicle, characterized in that the connecting piece 4 and the fuel holding plate 1 have a specific gravity that is lighter than the specific gravity of the fuel, and the mounting portion 6 is attached to the inner side wall of the fuel tank 8. This is related.

A preferred embodiment of the invention will now be described.

(Example) Figures 1 to 3 show examples of the present invention, and 1 is a fuel holding plate formed with a hollow 2 to make the apparent specific gravity lighter than the specific gravity of automobile fuel so that it floats on the surface of the fuel. Joint 3 with free bending in the vertical direction
It is connected to the connecting piece 4 through the connecting piece 4, and further connected to the attachment part 6 through the joint 5 which is free to bend in the vertical direction. The connecting piece 4 is also made to have a specific gravity lighter than that of automobile fuel, and the true specific gravity can be made lighter than the specific gravity of the fuel by not providing a hollow 2 in the fuel holding plate 1. Reference numeral 8 denotes a fuel tank, and a support plate 7 is horizontally attached to the inner side surface of the fuel tank, and the aforementioned mounting portion 6 is attached to the support plate 7, so that the joint 5 is located below the support plate 7.

The fuel retaining plate 1, connecting piece 4 and mounting portion 6 are all made smaller than the horizontal dimension of the fuel tank 8, and an appropriate number of them are arranged in parallel with small horizontal intervals and attached to the inner wall of the fuel tank 8 by support plates 7.

(Function) The present invention has the configuration illustrated above, and when the amount of liquid fuel filled in the fuel tank 8 is large, the connecting piece 4 bends upward from the joint 5 as shown by the two-dot chain line in FIG. Float the holding plate 1 on a high fuel level (if the amount of fuel increases further, set the height of the full liquid level to just before the fuel holding plate 1 floats diagonally in the liquid). When the amount reaches the height of the joints 3 and 5, the connecting piece 4 and the fuel holding plate 1 move to the first position.
As shown by the dashed line in the figure, it becomes almost horizontal and floats on the liquid surface, and when the amount of fuel decreases further, the connecting piece 4 lowers and the fuel holding plate 1 floats on the liquid surface at a low level. Also, the fuel holding plate 1 floats on the fuel liquid level and suppresses the wave motion of the liquid level.

(Effects of the invention) In the present invention, a connecting piece 4 that can be freely bent in the vertical direction is protruded from the mounting part 6 by a joint 5, and a fuel holding plate 1 is attached to the projecting end of the connecting piece 4 by a joint 3 in the vertical direction. The mounting part 6 is attached to the inner side wall of the fuel tank 8, and the connecting piece 4 and the fuel holding plate 1 have a length that is almost horizontal and floating on the liquid surface. 1 will rub against the inner wall surface of the fuel tank 8 and cause a squeak noise.
Since the connecting piece 4 and the fuel holding plate 1 have a specific gravity that is lighter than the specific gravity of the fuel, they float on the liquid level that changes as the fuel increases and decreases, effectively suppressing the wave motion of the liquid level and reducing vehicle vibration. This device has an excellent effect of preventing the generation of noise due to wave motion of fuel in the fuel tank during acceleration, braking, etc., and has the effect of effectively preventing fuel flow noise compared to the conventional device described above.

[Brief explanation of the drawing]

Figures 1 to 3 of the accompanying drawings illustrate the invention;
The figure is a side view showing the movement of the fuel holding plate 1 as the fuel liquid level changes, FIG. 2 is a perspective view of the fuel holding plate 1,
FIG. 3 is a perspective view of the entire invention. FIG. 4 is a perspective view of a conventional partition plate for preventing fuel flow noise. DESCRIPTION OF SYMBOLS 1... Fuel holding plate, 2... Hollow, 3, 5... Joint, 4... Connection piece, 6... Mounting part, 7... Support plate, 8... Fuel tank.

Claims (1)

[Scope of utility model registration request] A connecting piece 4 that is free to bend in the vertical direction is protruded from the mounting part 6 through a joint 5, and the fuel presser plate 1 is connected to the protruding end of the connecting piece 4 through a joint 3 so that the connecting piece 4 can be bent freely in the vertical direction. The length of the fuel holding plate 1 is such that it is almost horizontal and floats on the liquid surface, and
A fuel flow noise prevention device for a fuel tank for a vehicle, characterized in that the connecting piece 4 and the fuel holding plate 1 have a specific gravity that is lighter than the specific gravity of the fuel, and the mounting portion 6 is attached to the inner side wall of the fuel tank 8.