CN205059242U - Fuel servicing system - Google Patents

Abstract

The utility model provides a fuel servicing system, include the expansion chamber and filling pipe that are linked together with the fuel tank, expansion chamber and filling pipe formula structure as an organic whole, the expansion chamber is linked together with the filling pipe. Adopt the utility model discloses, can solve the fuel tank because of arranging space limitation, steam space is not enough, the not enough problem of fuel tank nominal volume that arouses.

Description

A fuel injection system

technical field

The utility model relates to the technical field of fuel filling pipes for automobiles, in particular to a fuel filling system.

Background technique

Due to the volatility of gasoline, when the car is refueling, working or due to an increase in ambient temperature, the oil in the fuel tank evaporates, the vapor pressure inside the fuel tank increases, and the fuel tank expands and deforms. When the pressure of the fuel tank reaches the gravity valve, it opens When the pressure is high, the vapor in the fuel tank directly enters the carbon tank and is absorbed. Therefore, the fuel tank needs a certain vapor space for storing oil vapor to avoid damage to the fuel tank due to excessive internal pressure, resulting in safety accidents.

Generally, a vapor space of not less than 10% of the volume needs to be reserved during the design process of the fuel tank. Since the fuel filler pipe has no expansion chamber to buffer the fuel vapor in the fuel tank, the fuel tank needs a larger layout space to meet the rated volume and vapor space. Require. Usually, the fuel tank has limited volume due to the limited layout space, and the steam space cannot meet the 10% volume requirement. At this time, it is often necessary to sacrifice the rated volume of the fuel tank to increase the steam space to ensure the safety of the fuel tank, which leads to insufficient rated volume of the fuel tank. The car's mileage is shortened.

Utility model content

The technical problem to be solved by the utility model is to provide a fuel filling system, which can solve the problem of insufficient rated volume of the fuel tank due to the limitation of the layout space of the fuel tank and insufficient steam space.

In order to solve the above-mentioned technical problems, the utility model provides a fuel filling system, which includes an expansion chamber and a filling pipe connected to the fuel tank, the expansion chamber and the filling pipe are of an integral structure, and the expansion chamber Connected to the filling pipe.

Preferably, the expansion chamber and the filling pipe are integrally blow-molded.

As an improvement of the above technical solution, a gravity valve is provided on the expansion chamber, and the gravity valve is connected to the carbon canister through the first steam pipe.

As an improvement of the above technical solution, a quick-connect plug is provided on the expansion chamber, and the quick-connect plug is connected to the fuel tank through the second steam pipe.

Preferably, there is at least one quick-connect plug.

Preferably, the expansion chamber is located above the fuel tank, and the quick-connect plug is arranged at the bottom of the expansion chamber.

As an improvement of the above technical solution, the filling pipe is connected with a vent pipe.

Preferably, the breather pipe is connected to the pipe wall on the side of the oil inlet of the filling pipe and communicates with the filling pipe.

Preferably, the first steam pipe, the second steam pipe and the ventilation pipe are all hoses.

A fuel filling system implementing the utility model has the following beneficial effects compared with the prior art:

The utility model makes full use of the space of the filling pipe through the integrated blow molding design of the above-mentioned expansion cavity and the filling pipe, so that the filling pipe has the effect of buffering the fuel vapor in the fuel tank. During the working process or when the ambient temperature rises, part of the vapor storage space of the fuel tank can be transferred to the expansion chamber and the filling pipe, which increases the volume of the fuel tank; saves the layout space of the fuel tank, and can solve the problem of the layout space of the fuel tank The problem of insufficient rated volume caused by the limitation; at the same time, it can avoid the waste of layout space caused by the separate design of the expansion chamber, the difficulty of parts management and the increase of cost.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below.

Fig. 1 is a structural schematic diagram of a fuel filling system of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, one embodiment of the present utility model is a fuel filling system, which includes an expansion chamber 1 and a filling pipe 2 connected to the fuel tank, and the expansion chamber 1 and the filling pipe 2 are integrated Formula structure, the expansion chamber 1 communicates with the filling pipe 2 . It can be seen that, through the integrated design of the above-mentioned expansion chamber 1 and the filling pipe 2, this embodiment fully utilizes the space of the filling pipe 2, so that the filling pipe 2 has the effect of buffering the fuel vapor in the fuel tank. During the refueling process or working process or the ambient temperature rises, part of the vapor storage space of the fuel tank can be transferred to the filling system (that is, the expansion chamber 1 and the filling pipe 2), which increases the volume of the fuel tank; saves fuel The arrangement space of the tank can solve the problem of insufficient volume of the fuel tank due to the limitation of the arrangement space; at the same time, it can avoid the waste of arrangement space caused by the separate design of the expansion chamber 1, the difficulty of parts management and the increase of cost.

Preferably, the expansion chamber 1 and the filling pipe 2 are integrally blow-molded with plastic material, and the manufacturing cost is low.

In order to realize the control of gasoline vapor pressure in the expansion chamber 1 , a gravity valve 11 is provided on the expansion chamber 1 , and the gravity valve 11 is connected to the carbon canister through the first steam pipe 3 . Thus, when the gasoline vapor pressure in the expansion chamber 1 reaches the opening pressure of the gravity valve 11, the gasoline vapor enters the carbon canister through the first steam pipe 3 to be adsorbed, and finally desorbed and enters the engine for combustion.

For the convenience of assembly, a quick-connect plug 12 is provided on the expansion chamber 1, and the quick-connect plug 12 is connected to the fuel tank through the second steam pipe. In this way, when the car is refueling or working or the ambient temperature rises, the gasoline vapor in the fuel tank enters the expansion chamber 1 through the second steam pipe connected to the quick-plug connector on the expansion chamber 1 for storage.

Preferably, at least one quick-connect plug 12 is provided to ensure that the steam in the fuel tank can enter the expansion chamber 1 smoothly, so as to avoid the excessive internal pressure of the fuel tank caused by the rapid expansion of fuel due to heating and insufficient pressure relief. question.

Preferably, the expansion chamber 1 is located above the fuel tank, and the quick-connect plug 12 is arranged at the bottom of the expansion chamber 1 . In this way, the expansion chamber 1 and the fuel tank are arranged at high and low positions, so that the fuel that enters the expansion chamber 1 from the filling pipe 2 during the refueling process can flow into the fuel tank by itself under the action of gravity, effectively preventing the oil from being accumulated in the expansion chamber 1. Fuel reduces the vapor storage space in the expansion chamber 1 .

On the basis of the above embodiments, the filling pipe 2 is also connected with a vent pipe 4 . Specifically, the breather pipe 4 is connected to the pipe wall on the side of the oil inlet of the filling pipe 2 and communicates with the filling pipe 2 . It should be noted that the refueling exhaust path (fuel tank → carbon tank → engine) of the on-board refueling vapor recovery system is different from that of the non-vehicle refueling vapor recovery system. During the refueling process of the on-board refueling vapor recovery system, the vapor in the fuel tank is not allowed to pass through Filling pipe 2 is exhausted into the atmosphere but needs to enter the carbon tank to be adsorbed. Therefore, there is no need to add a vent pipe in the vehicle refueling oil vapor recovery system.

The first steam pipe 3, the second steam pipe and the ventilation pipe 4 are all preferably hoses.

The above disclosures are only preferred embodiments of the present utility model, and of course the scope of rights of the present utility model cannot be limited with this. Therefore, equivalent changes made according to the patent scope of the utility model are still covered by the utility model. scope.

Claims (9)

1. a fueling system, is characterized in that, comprises the expansion chamber and filler pipe that are connected with fuel tank, and described expansion chamber and filler pipe are integral type structure, and described expansion chamber is connected with filler pipe.

2. fueling system as claimed in claim 1, is characterized in that, described expansion chamber and filler pipe integrally blow shaping.

3. fueling system as claimed in claim 1, it is characterized in that, described expansion chamber is provided with weight valve, and described weight valve is connected with canister by the first steam pipe.

4. fueling system as claimed in claim 3, it is characterized in that, described expansion chamber is provided with fast plug, and described fast plug is connected with fuel tank by the second steam pipe.

5. fueling system as claimed in claim 4, it is characterized in that, described fast plug is at least provided with 1.

6. fueling system as claimed in claim 4, it is characterized in that, described expansion chamber is positioned at the top of fuel tank, and described fast plug is arranged on the bottom of described expansion chamber.

7. the fueling system as described in any one of claim 4 to 6, is characterized in that, described filler pipe is connected with breather pipe.

8. fueling system as claimed in claim 7, is characterized in that, the tube wall that described breather pipe is connected to described filler pipe oil inlet side communicates with described filler pipe.

9. fueling system as claimed in claim 7, it is characterized in that, described first steam pipe, the second steam pipe and breather pipe are flexible pipe.