JPH10119595A - Fuel feed port structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent air pollution at the time of fuel feed by reducing the diameter of a filler tube without impairing the fuel feeding property. SOLUTION: When the tube general section 11a of a filler tube 11 is made smaller in diameter than a neck section 12, a gap is hardly generated between its inner periphery and the fuel liquid column flowing at the time of fuel feed, and the outflow of the evaporated fuel from a fuel feed port is avoided. When the nozzle insertion regulating hole 15 of a shutter plate 14 is molded as a vertical oblong hole, a fuel feed nozzle 7 can be freely oscillated in the vertical direction, the base section of the fuel feed nozzle 7 can be surely coupled and held on the screw section 13 of the fuel feed port, a large diameter change acting as fuel feed resistance is not required on the tube general section 11a to allow this oscillating motion, and the holding property of the fuel feed nozzle 7 can be secured and the fuel feeding property can be improved at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fuel filler structure for a motor vehicle.

[0002]

2. Description of the Related Art FIG. 3 shows a fuel supply structure of a conventional automobile. Reference numeral 1 denotes a filler tube, a vessel 5 having an opening end of a neck portion 2 joined to a peripheral edge of an opening portion 4 of a vehicle body outer panel 3.
And is joined at a penetrating portion of the vessel 5.

[0003] A screw portion 6 is formed on the inner periphery of the open end of the neck portion 2 to screw and fix a filler cap (not shown).

The diameter of the refueling nozzle 7 is different between unleaded gasoline and leaded gasoline. In a vehicle of unleaded gasoline type, insertion of a small-diameter unleaded gasoline nozzle into the middle part of the neck 2 is allowed. In addition, a shutter plate 8 having a nozzle insertion restriction hole 9 whose diameter is set so that a large-diameter leaded gasoline nozzle cannot be inserted is joined and arranged.

The fuel supply nozzle 7 has a spiral wire 10 disposed on the outer periphery of its base. When fuel is supplied, the fuel supply nozzle 7 is inserted into the neck 2 so that the spiral wire 10 is inserted into the open end of the neck 2. By engaging with the peripheral thread portion 6, the neck portion 2 can be held at the opening edge, that is, at the fuel supply port edge.

[0006]

The filler tube 1 needs to have a large diameter to some extent so that the fuel supply nozzle 7 can be easily inserted into the fuel supply port of the neck portion 2. In order to avoid air pollution due to the outflow of the evaporated fuel, the filler tube 1 needs to have as small a diameter as possible so as not to form a gap between the inner periphery thereof and the liquid column of the fuel circulated by refueling. Therefore, as shown in FIG. 3, the neck portion 2 of the filler tube 1 has a large diameter to secure the insertability of the refueling nozzle 7, and the general tube portion 1a of the fuel flowing through the inside thereof as shown by a virtual line. It is desired to make the diameter small so that no gap is formed between the liquid column and the liquid column.

However, when the diameter of the general tube portion 1a is reduced, when the fuel nozzle 7 is inserted into the nozzle insertion restricting hole 9 of the shutter plate 8, the tip of the fuel nozzle 7 interferes with the inner peripheral surface of the general tube portion 1a. Then, the vertical swing of the refueling nozzle 7 is regulated by the contact point between the refueling nozzle 7 and the inner peripheral surface of the tube general portion 1a, the edge of the nozzle insertion regulating hole 9 and the contact point. The spiral wire 10 on the outer periphery cannot be engaged with the threaded portion 6 at the fuel filler port edge, and the retention of the fuel nozzle 7 is impaired.

Therefore, in order to ensure the retentivity of the refueling nozzle 7, a portion connected to the neck portion 2 of the tube general portion 1a as shown in FIG. It is necessary to form an enlarged diameter portion 1b slightly larger in diameter than the diameter so as to allow vertical swinging of the refueling nozzle 7, and as a result, the enlarged diameter portion 1b and the general tube portion 1a are required. The refueling nozzle 7
The flow resistance of the fuel flowing out of the tank increases, and the fuel supply property is impaired.

SUMMARY OF THE INVENTION Accordingly, the present invention is to provide a fuel filler opening structure for an automobile, which can reduce the diameter of the filler tube without impairing the fuel supply property and can prevent air pollution at the time of fuel supply. .

[0010]

According to a first aspect of the present invention, a screw portion for screwing a filler cap is formed on an inner periphery of an opening of a neck portion of a filler tube. A shutter plate having a nozzle insertion restricting hole for restricting insertion of a refueling nozzle inserted and held in engagement with the screw portion is provided, and a general tube portion following the neck portion has a smaller diameter than the neck portion. It is characterized in that the nozzle insertion regulating hole of the shutter plate is formed as a vertically long hole that allows the inserted oil supply nozzle to swing vertically.

According to a second aspect of the present invention, the screw portion and the shutter plate according to the first aspect are provided on an inner tube fitted and fixed in a neck portion of the filler tube.

[0012]

According to the first aspect of the present invention, since the tube general portion of the filler tube is formed to have a smaller diameter than the neck portion, the space between the inner periphery of the tube general portion and the liquid column of the fuel circulated by refueling. Gaps are unlikely to occur, and it is possible to prevent the outflow of the evaporated fuel from the fuel filler port to the outside.
Since the nozzle insertion restricting hole of the shutter plate disposed in the neck portion is formed as a vertically long hole that allows vertical movement of the inserted refueling nozzle in the vertical direction, the inserted refueling nozzle is a general tube portion. The nozzle can be swung up and down freely without being constrained by the inner peripheral surface of the nozzle and the nozzle restricting hole of the shutter plate. The lubrication nozzle can be securely engaged and held with the threaded portion on the inner circumference of the opening end of the neck without forming an enlarged diameter portion for allowance, thereby ensuring the retention of the lubrication nozzle and improving the lubrication performance. It is possible to achieve both.

According to the second aspect, in addition to the effect of the first aspect, the screw portion and the shutter plate are provided on the inner tube fitted and fixed in the neck portion of the filler tube. A shutter plate can be easily provided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings, in which the same reference numerals are assigned to the same parts as in the above-mentioned conventional configuration.

In FIGS. 1 and 2, reference numeral 11 denotes a filler tube, and a neck portion 12 is formed to have a large diameter so that the refueling nozzle 7 can be easily inserted, and an opening end of the neck portion 2, that is, a fuel filler end. Are protrudingly arranged in a vessel 5 joined to the periphery of the opening 4 of the vehicle body outer panel 3, and are joined at a penetrating portion of the vessel 5.

Further, the tube general portion 11a following the neck portion 12 of the filler tube 11 has no gap between the fuel column which is supplied from the fuel supply nozzle 7 inserted into the fuel filler port and flows therethrough. Such a diameter is formed smaller than the neck portion 12.

The connecting portion between the neck portion 12 and the general tube portion 11a is formed in a tapered shape so that the tip of the nozzle 7 does not catch when the nozzle 7 is inserted. The center line of the general portion 11a is offset below the center line of the neck portion 12 so that the upper slope of the tapered portion becomes larger.

A screw portion 13 for screwing and fixing a filler cap (not shown) is provided on the inner periphery of the open end of the neck portion 12, and only a specific refueling nozzle 7 can be inserted into an intermediate portion of the neck portion 12. A shutter plate 14 having a nozzle insertion regulating hole 15 whose diameter is set as described above is provided. In this embodiment, the screw portion 13 and the shutter plate 14 are fitted into the neck portion 12 to fit. It is provided on the inner tube 16 to be joined and fixed.

The nozzle insertion restricting hole 15 of the shutter plate 14 is formed as a vertically long hole so as to allow the fuel supply nozzle 7 inserted into the nozzle insertion restricting hole 15 to swing up and down, that is, a short diameter. Is formed to have a predetermined diameter into which only the specific refueling nozzle 7 can be inserted, and to be vertically elongated.

According to the structure of the above embodiment, the tube general portion 11 following the neck portion 12 of the filler tube 11.
a is formed to have a smaller diameter than the neck portion 12 so as not to form a gap between the liquid column of the fuel which is supplied from the refueling nozzle 7 and circulates through the inside thereof. Between the fuel column and the fuel column, which prevents the evaporative fuel from leaking through the gap and flowing out of the fuel filler port to the outside. Can be prevented.

When fuel is supplied, the fuel supply nozzle 7 is inserted into the fuel filler port at the end of the neck 12 and the neck 1
When inserted into the nozzle insertion restricting hole 15 of the shutter plate 14 disposed in the middle part of the nozzle 2, the nozzle insertion restricting hole 15 is formed as a vertically long hole, and the vertical reciprocating movement of the refueling nozzle 7 is performed. Since the fuel supply nozzle 7 can be freely operated, the fuel supply nozzle 7 is swung up and down, and the spiral wire 10 provided on the outer periphery of the base portion is securely engaged with the screw portion 13 on the inner periphery of the opening end of the neck portion 12. Can be retained.

Therefore, the fuel supply nozzle 7 can be connected to the fuel filler port without forming an enlarged diameter portion for allowing vertical swinging of the fuel filler nozzle 7 at a portion connected to the neck portion 12 of the tube general portion 11a. Since it is possible to reliably engage and hold the rim, and there is no step in the general tube portion 11a that becomes the oil supply resistance due to the large-diameter change portion, it is possible to secure both the oil retention of the oil supply nozzle 7 and the improvement of the oil supply. Can be planned.

In the present embodiment, the neck 1
Since the above-mentioned screw portion 13 and shutter plate 14 are provided on the inner tube 16 fitted and fixed in the inside 2,
The screw portion 13 and the shutter plate 14 can be easily arranged on the neck portion 12.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view showing a conventional structure.

[Explanation of symbols]

 7 Refueling nozzle 11 Filler tube 11a Tube general part 12 Neck part 13 Screw part 14 Shutter plate 15 Nozzle insertion regulating hole 16 Inner tube

Claims (2)

[Claims] 1. A screw portion for screwing a filler cap is formed on an inner periphery of an opening end of a neck portion of a filler tube, and is inserted into an intermediate portion of the neck portion from the opening end to be engaged and held by the screw portion. Along with disposing a shutter plate having a nozzle insertion restricting hole for restricting the insertion of a refueling nozzle,
The general tube portion following the neck portion has a smaller diameter than the neck portion, and the nozzle insertion restriction hole of the shutter plate can allow the inserted oil supply nozzle to swing vertically. A fuel filler structure for a vehicle, wherein the fuel filler structure is formed in a vertically long hole. 2. The fuel filler port structure for an automobile according to claim 1, wherein the screw portion and the shutter plate are provided on an inner tube fitted and fixed in a neck portion of the filler tube.