JPH0685121U - Fuel tank filler neck structure - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Regarding the structure of a filler neck in which the tip of the refueling gun of the automatic refueling device is inserted to a predetermined depth in the fuel tank of the vehicle to form the refueling passage, The purpose is to shorten the length and optimize the automatic lubrication amount. In a filler neck structure of a fuel tank in which a tilting filler tube 11 is provided on an upper portion of a fuel tank and a cap is detachably attached, the filler tube is a short filler tube, and a spring 21 is interposed in the filler tube. The inner cylinder 22 is provided so that it can be retracted and retracted, and the supercharging oil removal port 24 is formed in the lower portion of the side wall of the inner cylinder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a filler neck in a fuel tank of a vehicle, in which a tip of an oil supply gun of an automatic oil supply device is inserted to a predetermined depth to form an oil supply passage.

[0002]

[Prior art]

 Conventionally, in a fuel tank such as a truck, as shown in FIG. 4 (a), a filler tube (fueling pipe) 41 is inserted into a fueling port of the fuel tank 40, and a tip of a fueling gun 42 of an automatic fueling device is installed. The automatic lubrication amount (corresponding to the oil level indicated by the thin line in Fig. 4 (b)) set by the sensor provided at the tip of the needle for deep insertion is indicated by the alternate long and short dash line. It was much less than the oil level when the tank was full, which corresponded to the oil level. Further, as a method for properly setting such an automatic refueling amount, for example, as shown in FIG. 5 (a), the length of the filler tube 41 is set to be long or as shown in FIG. 5 (b). A method of setting a small mounting angle of the filler tube 41 with respect to the tank 40 has been adopted.

For such a fuel tank and a filler tube, various structures have been proposed, for example, in Japanese Utility Model Publication No. 62-95024 and Japanese Utility Model Publication No. 4-51823.

[0004]

[Problems to be solved by the device]

 However, in the method shown in FIG. 5 (a) among the above-described methods for making the automatic fueling amount appropriate, it is necessary to secure a space for accommodating the long filler tube 41 around the upper side surface of the fuel tank 40. There were cases where restrictions were placed on the mounting position of the fuel tank 40. Further, in the method shown in FIG. 5 (b), the oil level in a nearly full state is close to the upper end opening of the filler tube 41 as shown in FIG. 5 (c), so fuel may overflow. The workability of additional lubrication for finely adjusting the lubrication amount was poor.

An object of the present invention is to shorten the filler neck length and optimize the automatic oil supply amount.

[0006]

[Means for Solving the Problems]

 The present invention is a fuel tank filler neck structure in which a tilting filler tube is provided at the top of the fuel tank and a cap is detachably attached, and the filler tube is a short filler tube and a spring is attached to the filler tube. It is characterized in that an inner cylinder is provided so as to be retractable through the inner cylinder, and a supercharging oil removal port is formed in the lower portion of the side wall of the inner cylinder.

[0007]

[Action]

 In the filler neck structure of the fuel tank according to the present invention, when the cap is opened, the force of the spring causes the inner cylinder to protrude, thereby extending the length of the filler tube.

Therefore, the insertion height of the tip of the fueling gun into the filler tube is set to an appropriate high position, and the automatic oiling amount becomes an appropriate value. When the cap is closed against the spring, the inner cylinder is retracted and the filler neck becomes shorter.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

A feature of the present embodiment is that a filler tube 11 having a different filler neck structure is inserted into the fuel filler port formed in the upper portion of the fuel tank 40 in place of the conventional filler tube 41.

FIG. 2 is a diagram showing the structure of the filler neck. In the figure, the filler tube 11 is shorter than the conventional filler tube 41, and one of the openings at both ends corresponding to the insertion port side of the fuel gun 42 has a circular cap (not shown) of the fuel tank 40. A hole 20 is formed which engages with the outer circumference and the two protrusions provided on the outer circumference. A spring 21 and an inner cylinder 22 having an outer diameter substantially equal to that of the cap are inserted and arranged in series inside the filler tube 11 between both openings. A hole 23, which serves as an insertion port for the tip portion of the fuel gun 42, is formed in one of both openings of the inner cylinder 22 that does not come into contact with the spring 21. In the side surface of the inner cylinder 22, at a position where the distance between the hole 21 and the side surface of the fuel tank 40 is the shortest, a substantially square V-shaped supercharging oil removing port 24 is formed.

The operation of this embodiment will be described below with reference to FIGS. 1 and 2. While the vehicle is running or when other fuel is not supplied, the cap of the fuel tank 40 engages with the hole 20 to close the fuel filler port, and the cap resists the force of the spring 21 and forms an inner cylinder in the filler tube 11. 22 is accommodated. Therefore, the opening of the filler tube 11 does not project largely from the side surface of the fuel tank 40 as in the conventional example, and the restriction imposed on the mounting position of the fuel tank 40 and the like is avoided.

In addition, when refueling, the cap is released after being disengaged from the hole 20, and the inner cylinder 22 is projected to the outside of the hole 20 by the force of the spring 21. The length of the filler tube 11 is effectively extended by the length of the protruding inner cylinder 22. The length of the filler tube 11 and the length of the inner cylinder 22 are preset to the minimum values according to the length of the tip of the fuel gun 42 and the position of the oil level corresponding to the automatic oil amount to be set. To be done. Therefore, as shown in FIG. 1, the position of the tip opening of the refueling gun 42 that is inserted most deeply from the hole 23 (relative position from the bottom of the refueling tank) is smaller than that of the conventional example that does not have the inner cylinder 22. As a result, the automatic refueling amount set by the sensor provided at the tip end opening is increased as compared with the above-described conventional example, and fuel is refueled in an amount close to the original capacity of the fuel tank 40.

In addition, as shown in FIG. 3, since the distance from the hole 21 to the oil level is short, the oil level rises when additional oil is supplied from the hole 23 with the tip of the fuel gun 42 being substantially pulled out. Can be visually confirmed, and the height of the supercharging oil discharge port 24 with respect to the bottom surface of the fuel tank 40 is previously matched with the position of the oil level when the tank is full, so that the supercharging is prevented. Further, in this way, even when the oil level is full, an air chamber is secured in the fuel tank 40 in a region sandwiched between the upper part of the inner wall of the fuel tank 40 and the upper side surface of the filler tube 11 in contact with the oil level.

As described above, according to the present embodiment, it is possible to set the length of the filler tube 11 to be short to increase the automatic oil supply amount, and to easily adjust the oil supply amount up to the appropriate maximum oil supply amount.

[0016]

[Effect of device]

 As described above, in the present invention, the length of the filler tube is set to be short, and the position of the tip opening of the fuel gun inserted through the filler tube is set to a position higher than the bottom surface of the fuel tank. Therefore, the automatic lubrication amount set by the sensor provided at the opening at the tip is increased, and it becomes easy to adjust the lubrication amount up to the proper maximum lubrication amount while visually confirming the oil surface.

Therefore, in the vehicle to which the present invention is applied, the fuel tank is reliably and automatically replenished with a large amount of fuel having almost the same capacity, and the mounting position of the fuel tank is restricted as in the conventional example. The workability of refueling will not be deteriorated due to the imposition of fuel consumption, and the possibility of fuel overflow will be greatly reduced, thus improving the efficiency and safety of refueling work.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a structure of a filler neck.

FIG. 3 is a diagram illustrating additional refueling work in the present embodiment.

FIG. 4 is a diagram showing a configuration example of a conventional fuel tank.

FIG. 5 is a diagram illustrating a problem of a conventional example.

[Explanation of symbols]

 11,41 Filler tube 20,23 Hole 21 Spring 22 Inner cylinder 24 Super-lubrication exclusion port 40 Fuel tank 42 Refueling gun

Claims (1)

[Scope of utility model registration request] 1. In a filler neck structure of a fuel tank in which a tilting filler tube is provided on an upper portion of the fuel tank and a cap is detachably attached, the filler tube is a short filler tube, and a spring is interposed in the filler tube. A filler neck structure for a fuel tank, in which an inner cylinder is provided so that it can be retracted and retracted freely, and a supercharging oil removing port is formed in a lower portion of a side wall of the inner cylinder.