JPS63266315A - Remaining fuel detector for fuel tank - Google Patents

Abstract

PURPOSE:To exactly indicate the remaining quantity of a fuel tank by providing an adjusting weight for adjusting the buoyancy of a float so as to be freely movable in a prescribed stroke axial direction, on an arm. CONSTITUTION:When fuel is at a full tank position, an adjusting weight 7 goes away from a float 5 and buoyancy of the float 5 becomes larger, and the float 5 floats up greatly from a liquid level. when the fuel decreases to an empty position, the adjusting weight 7 moves to the float 5 side by as oscillation of an arm 3, the buoyancy of the float 5 becomes smaller, and the float 5 comes to be apt to sink under a liquid level. In such a way, the ascent and descent quantity of the float 5, that is, an oscillation stroke of the arm 3 becomes larger extending from the full tank position of the fuel to the empty position, and the resistance value variation quantity of a slide resistance 6 extending from the full tank state of the fuel to the empty state can be made large.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a residual fuel detection device 1 for a fuel tank mainly used in automobiles, and more specifically, a float is attached to the free end of an arm that is freely oscillated in the tank. The present invention relates to a remaining fuel detection device for a fuel tank, in which the arm is oscillated via the float to interlock a fuel gauge.

(Prior art) Conventionally, as a residual fuel detection device for this type of fuel tank,
For example, a device described in Japanese Utility Model Application Publication No. 56-70426 is known, and the remaining fuel detection device described in this publication has an arm with a float at its tip supported in a freely swinging manner inside a fuel tank. In addition, a slide resistor whose resistance value can be changed by swinging the arm and a fuel gauge that operates in conjunction with the slide resistor are provided, and the vertical movement of the float in accordance with fluctuations in the fuel in the tank causes the The resistance value of the slide resistor is changed by operating the arm, and the fuel gauge is operated by changing the resistance value.

(Problems to be Solved by the Invention) However, in the above-described remaining fuel detection device for a fuel tank, it is not possible to increase the amount of change in the resistance value of the slide resistor when the fuel changes from a grooved state to an empty state. For example, the fuel gauge can indicate the tank condition more accurately than before.

However, as a method for increasing the amount of change in the resistance value of the slide resistance when the fuel changes from the fuel groove state to the empty state as described above, for example, the arm is made large, and the end of the slide resistance side of the arm is It may be possible to increase the amount of movement of the arm, but if the arm is made larger, more space must be secured for assembly.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to change the fuel groove from an empty state (F position) to an empty state (E position!) by adding a simple part to the arm.
! By increasing the amount of change in the resistance value of the slide resistance up to the point where the pointer of the fuel gauge indicates the groove tank position 11t (F position 11F) and the empty position (E position) more accurately than before. It is an object of the present invention to provide a residual fuel detection device for a fuel tank.

(Means for solving the problems) As shown in the embodiments of the drawings, the present invention provides a tank (1)
Support freely swinging within! =Remaining fuel detection in a fuel tank in which a float (5) is provided at the free end of the arm (3), and the arm (3) is swung through the float (5) to interlock the fuel gauge. The apparatus is characterized in that an adjustment weight (7) for adjusting the buoyancy of the float (5) is provided on the arm (3) so as to be freely movable in the axial direction by a predetermined stroke.

(Function) According to the remaining fuel detection device according to the present invention, when the fuel is at the groove tongue position, the adjustment weight (7)
5), the buoyancy of the float (5) increases and the float (5) rises above the liquid surface, while when the fuel decreases to the empty position, the arm (3) swings, The adjustment weight (7) is connected to the float (
5) side, the buoyancy of the float (5) becomes smaller and the float (5) tends to sink to the liquid surface, so the float (5) moves from the fuel groove tongue position to the empty position. The amount of elevation of the arm (3)
The swing stroke of the fuel tank becomes larger and the fuel tank becomes full (
This makes it possible to further increase the amount of change in the resistance value of the slide resistor from the empty state (position F) to the empty state (position E rf1).

(Example) The remaining fuel detection device for a fuel tank according to the present invention will be explained below by referring to an example shown in the drawings.

The fuel tank (1) shown in the drawing has a sender body (2) assembled therein, and a remaining fuel detection device is attached to the sender body (2).

This remaining fuel detection device is bent in a roughly angular shape and the bent portion (
An arm (3) equipped with an arm (30) is directed to swing freely to the sender body (2) via a pivot shaft (4), and a float ( 5), while attaching the arm (3) to the upper part of the arm (3).
) Slide resistance whose resistance value is variable as it oscillates (6)
is provided so that this slide resistor (6) is linked to a fuel gauge (not shown).

Thus, when fuel is loaded in the tank (1) to the groove tongue position (F position), the float (5
) rises to the full position, - this float (
Due to the swinging of the arm (3) as the arm (5) rises, the pointer of the fuel gauge indicates the groove tongue position via the slide resistance (6), and at this time, the bending part (30)
The end of the float (5) is positioned above the opposite end.

Further, when the fuel in the tank (1) is consumed from the full position to the empty position fil (E position), the float (5) descends to the empty position, and the float (5) lowers. Due to the swinging of the arm (3) accompanying this movement, the pointer of the fuel gauge indicates the empty position via the slide resistance (6), and at this time, the float (5) at the bent portion (30) ) side end is set at a lower position than the opposite side end.

In the above-described residual fuel detection device for the fuel tank (1), the present invention provides an adjustment weight (7) for adjusting the buoyancy of the float (5), which is provided at a predetermined position on the bent portion (30) of the arm (3). This allows for free movement in the axial direction of the stroke.

Specifically, a pair of stoppers (8a) (8b) are fixed to the bent portion (30) of the arm (3) at a predetermined distance apart, and a through hole having a diameter slightly larger than the diameter of the arm (3) is fixed. (
forming an adjusting weight (7) with an adjusting weight (71);
) at the bending portion (30), the stopper (8a
) (8b), it was instructed to freely move through the through hole (71).

Next, the operation of the remaining fuel detection device configured as above will be explained.

When the fuel loaded in the tank (1) is full, the float (5) rises to the groove tongue position, and the upper end portion of the arm (3) touches the slide resistance (6).
) to the F position of the tank (1).
) is consumed to the empty position, the float (5) descends to the empty position,
The upper end portion of the arm (3) is the slide resistor (6).
It moves to the E position.

When the fuel in the tank (1) is in a grooved state, the end of the bent portion (30) of the arm (3) on the float (5) side is the opposite end, as shown by the solid line in the figure. Since it is located above the adjustment weight (
7) moves away from the float (5) and the buoyancy of the float (5) increases. Therefore, at the above fuel tank position, the float (3) moves far away from the fuel level. It floats up.

On the other hand, when the fuel is empty, 2
As shown by the dashed dotted line, the end of the bent portion (30) of the arm (3) on the float (5) side is located at a lower position than the opposite end, so the adjustment weight (7) is lower than the float (5). 5), the buoyancy of the float (5) decreases, and therefore, in the above empty position, the amount of sinking of the float (3) to the fuel liquid level increases.

Therefore, the amount of elevation of the float (5) from the fuel dripping tank position to the empty position, in other words, the arm (3)
The swing stroke of the fuel is increased to maintain the fuel groove condition (
Empty state from F rank ra)! The amount of change in the resistance value of the slide resistor up to (E position) can be increased, and the pointer of the fuel gauge can be displayed more accurately.

(Effects of the Invention) As explained above, in the fuel tank remaining fuel detection device according to the present invention, the arm (3) that is swingably supported by the tank (1) has a float provided on the arm (3). An adjusting weight (7) for adjusting the buoyancy of (5) is provided so as to be freely movable in the axial direction within a predetermined stroke, so that the buoyancy of the float (5) can be changed by movement of the adjusting weight (7) as the remaining amount of fuel changes. By setting the adjustment weight (7) to the float (
5) to increase the buoyancy of the float (5), while when the fuel decreases to the empty position, the swing of the arm (3) moves the adjustment weight (7) to the float (5).
By moving the float (5) to the side, the buoyancy of the float (5) is reduced, and the float (5) can sink freely to the liquid surface, so the float (5) can be moved from the full fuel position to the empty position. In other words, the amount of elevation of the arm (
Increase the swing stroke in step 3) until the fuel is in a dripping state (
The amount of change in the resistance value of the slide resistor from the empty state (position F) to the empty state (position E) can be made larger;
Therefore, the fuel gauge pointer from the full fuel position to the empty position is displayed accurately, and display errors are reduced.

[Brief explanation of the drawing]

The drawing is a partially cutaway side view showing the remaining fuel detection device for a fuel tank according to the present invention. (1)...Fuel tank (3)...Arm (5)...Float (7)...Adjusting weight - 111"

Claims (1)

[Claims] (1) Arm (3) supported freely in the tank (1)
) is provided with a float (5) at the free end of the float (5).
In the remaining fuel detection device for a fuel tank, the arm (3) is oscillated through the arm (3) to interlock the fuel gauge, and the arm (3) is provided with an adjustment weight (3) for adjusting the buoyancy of the float (5). 7) is provided to be freely movable in the axial direction within a predetermined stroke.