CN216231662U

CN216231662U - Oil tank pressure control valve and automobile fuel system with same

Info

Publication number: CN216231662U
Application number: CN202122432786.2U
Authority: CN
Inventors: 段文强; 李卫民; 冉林; 龙洋
Original assignee: Tengsuo Auto Parts Huangshi Co ltd
Current assignee: Tengsuo Auto Parts Huangshi Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-04-08
Anticipated expiration: 2031-10-09

Abstract

The utility model relates to the technical field of automobile fuel systems, in particular to an oil tank pressure control valve and an automobile fuel system with the same, which comprises a valve body, a hollow cavity body arranged in the valve body, a pressure relief assembly arranged below the valve body and an exhaust assembly arranged above the valve body; on the outer wall of oil tank was fixed in to the valve body, the pressure release subassembly was including hugging closely the pressure-relief piece that unloads that the inboard lower surface of valve body set up and stretching into the pressure-relief pipe in the oil tank, and the oil tank is normal during operation, and the pressure release aperture of pressure control valve lasts trace pressure release, reaches the inside pressure balance of oil tank, has reduced the inside fuel steam of oil tank through small pressure release and has got into the volume of charcoal jar to reduce the load of charcoal jar and the desorption volume of engine, reduce oil consumption.

Description

Oil tank pressure control valve and automobile fuel system with same

Technical Field

The utility model relates to the technical field of automobile fuel systems, in particular to a fuel tank pressure control valve and an automobile fuel system with the same.

Background

The emission limit and the measurement method of light automobile pollutants (GB 18352.6-2016) have issued more severe requirements on automobile emission. In order to reduce the load on the canister from fuel vapour inside the fuel tank, the prior art, which is generally connected to the circulation pipe or the canister in nipple form, has the disadvantages of high canister load and large engine desorption. In order to solve the problem, the applicant develops a pressure control valve, the pressure in the oil tank is discharged, and when the pressure in the oil tank is overlarge, the pressure control valve is opened to discharge the pressure, so that the normal operation of a fuel system is ensured; when the internal pressure of the oil tank is too small, the pressure is continuously discharged through the pressure relief small hole, and the quantity of fuel steam in the oil tank entering the carbon canister is reduced, so that the load of the carbon canister and the desorption quantity of an engine are reduced, and the oil consumption is reduced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The embodiment of the utility model provides an oil tank pressure control valve, which overcomes the defects of high load of a carbon tank and large desorption amount of an engine of the conventional automobile fuel system.

(II) contents of utility model

The embodiment of the utility model provides an oil tank pressure control valve, which comprises a valve body, a pressure relief assembly and an exhaust assembly, wherein a hollow cavity is arranged in the valve body; the valve body is fixed on the outer wall of the oil tank, and the pressure relief assembly comprises a pressure relief sheet arranged close to the lower surface of the inner side of the valve body and a pressure relief pipe extending into the oil tank; the middle part of the pressure relief sheet is provided with a through hole so that the oil tank is communicated with the cavity in the valve body; the exhaust component is communicated with the circulating pipe or the carbon tank; the pressure relief sheet is also provided with at least one pressure relief small hole.

Preferably, a guide rod and an elastic assembly are further arranged above the through hole, and a blocking piece used for blocking the through hole is arranged at the lower part of the guide rod; after the oil pressure in the oil tank exceeds a preset threshold value, the oil gas pushes the separation blade and the guide rod to move upwards and is discharged through the cavity in the valve body and the exhaust assembly above the valve body.

Preferably, the valve further comprises a guide piece arranged above the through hole, the elastic assembly comprises an elastic piece positioning part arranged right above the guide piece and a spring sleeved outside the guide rod, the elastic piece positioning part is fixed on the inner wall of the valve body, and the upper end of the spring is fixed on the elastic piece positioning part.

Preferably, the vent assembly is a biasing member including a vent section and a connecting section, the vent section being connected to one side of the top of the valve body by the connecting section.

The automobile fuel system comprises an oil tank and a breather valve arranged in the oil tank, and is characterized by further comprising the oil tank pressure control valve, wherein the pressure control valve is arranged on the outer side surface of the oil tank.

(III) advantageous effects

The oil tank pressure control valve provided by the embodiment of the utility model comprises a valve body, a pressure relief assembly and an exhaust assembly, wherein a hollow cavity is arranged in the valve body; the pressure relief assembly comprises a pressure relief sheet arranged close to the lower surface of the inner side of the valve body and a pressure relief pipe extending into the oil tank, when the oil tank normally works, a small pressure relief hole of the pressure control valve continuously performs micro pressure relief to achieve pressure balance inside the oil tank, and the amount of fuel steam inside the oil tank entering the carbon canister is reduced through the micro pressure relief, so that the load of the carbon canister and the desorption amount of an engine are reduced, and the oil consumption is reduced; when the internal pressure of the oil tank is too high, after the oil pressure exceeds a preset threshold value, the oil gas pushes the separation blade and the guide rod to move upwards and is discharged through the cavity in the valve body and the exhaust component above the valve body, so that the load of the carbon tank and the desorption amount of an engine are reduced, and the oil consumption is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a tank pressure control valve in an embodiment of the present invention;

fig. 2 is a schematic diagram of a fuel system of an automobile having a tank pressure control valve according to an embodiment of the present invention.

Description of reference numerals:

1: a valve body; 11: a cavity; 21: unloading the pressed sheet;

22: a pressure relief pipe; 23: a through hole; 24: a small pressure relief hole;

25: a guide member; 26: an elastic member positioning portion; 27: a spring;

3: a guide bar; 31: a baffle plate; 41: an exhaust section;

42: a connecting section; 5: a breather valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second" and "third" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. The directions of "up", "down", "left" and "right" are all based on the directions shown in the attached drawings. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

The embodiment of the utility model provided in this embodiment provides a fuel tank pressure control valve, as shown in fig. 1, including a valve body 1, a hollow cavity 11 in the valve body 1, a pressure relief assembly disposed below the valve body 1, and an exhaust assembly disposed above the valve body 1; the valve body 1 is fixed on the outer wall of the oil tank, and the pressure relief assembly comprises a pressure relief sheet 21 which is arranged close to the lower surface of the inner side of the valve body 1 and a pressure relief pipe 22 which extends into the oil tank; the middle part of the pressure relief sheet 21 is provided with a through hole 23 so that the oil tank is communicated with the cavity 11 in the valve body 1; the valve body 1 is characterized by further comprising a guide piece 25 arranged above the through hole 23, the elastic assembly comprises an elastic piece positioning part 26 arranged right above the guide piece 25 and a spring 27 sleeved outside the guide rod 3, the elastic piece is fixedly positioned on the inner wall of the valve body 1, the upper end of the spring 27 is fixedly arranged on the elastic piece positioning part 26, the guide rod 3 and the elastic assembly are further arranged above the through hole 23, and a blocking piece 31 used for blocking the through hole 23 is arranged at the lower part of the guide rod 3; when the oil pressure in the oil tank exceeds a preset threshold value, the oil gas pushes the baffle 31 and the guide rod 3 to move upwards and is exhausted through the cavity 11 in the valve body 1 and an exhaust assembly above the valve body 1; the exhaust component is communicated with the circulating pipe or the carbon tank; the pressure relief sheet 21 is also provided with at least one pressure relief small hole 24. When the oil tank normally works, the small pressure relief holes 24 continuously relieve pressure in a micro-scale manner to achieve pressure balance inside the oil tank, and the micro-pressure relief reduces the amount of fuel steam inside the oil tank entering the carbon canister, so that the load of the carbon canister and the desorption amount of an engine are reduced, and the oil consumption is reduced; when oil tank internal pressure was too big, after the oil pressure exceeded the threshold value that predetermines, oil gas promoted separation blade 31, guide arm 3 and upwards removed to the exhaust subassembly via cavity 11 in the valve body 1, the valve body 1 top is discharged, thereby reduces the load of canister and the desorption volume of engine, thereby reduces the oil consumption, carries out the pressure release.

Preferably, the exhaust assembly is a biasing member, and it includes exhaust section 41 and linkage segment 42, and exhaust section 41 passes through one side at the top of linkage segment 42 connection valve body 1, exhaust assembly with be certain angle setting between the valve body 1, with the exhaust assembly biasing, can reduce the space that fuel system took, in the valuable fuel vehicle in space, can save a large amount of spaces, improve its suitability greatly.

Preferably, the pressure relief sheet 21, the pressure relief pipe 22 and the guide 25 form a pressure relief assembly through an integral molding process, and the integral molding can improve the structural stability, reduce the assembly process and reduce the cost.

Simultaneously, this application also provides the automobile fuel system who has this oil tank pressure control valve, as shown in fig. 2, except that the conventionality includes the oil tank and sets up breather valve 5 in the oil tank, still include as above-mentioned arbitrary oil tank pressure control valve, be about to this pressure control valve install on the outside surface of oil tank can, after this pressure control valve is installed, solved the load height of the charcoal jar that current automobile fuel system exists and the desorption volume of engine is bigger than normal defect.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The oil tank pressure control valve comprises a valve body, wherein a hollow cavity is formed in the valve body, and the oil tank pressure control valve is characterized by further comprising a pressure relief assembly arranged below the valve body and an exhaust assembly arranged above the valve body; the valve body is fixed on the outer wall of the oil tank, and the pressure relief assembly comprises a pressure relief sheet arranged close to the lower surface of the inner side of the valve body and a pressure relief pipe extending into the oil tank; a through hole is formed in the middle of the pressure relief sheet, so that the oil tank is communicated with the cavity in the valve body; the exhaust component is communicated with the circulating pipe or the carbon tank; the pressure relief sheet is also provided with at least one pressure relief small hole.

2. The fuel tank pressure control valve according to claim 1, wherein a guide rod and an elastic component are further arranged above the through hole, and a blocking piece for blocking the through hole is arranged at the lower part of the guide rod; after the oil pressure in the oil tank exceeds a preset threshold value, the oil gas pushes the separation blade and the guide rod to move upwards and is discharged through the cavity in the valve body and the exhaust assembly above the valve body.

3. The fuel tank pressure control valve according to claim 2, further comprising a guide member disposed above the through hole, wherein the elastic assembly includes an elastic member positioning portion disposed directly above the guide member and a spring sleeved outside the guide rod, the elastic member positioning portion is fixed to an inner wall of the valve body, and an upper end of the spring is fixed to the elastic member positioning portion.

4. A tank pressure control valve according to claim 1, wherein said vent assembly is a biasing member including a vent section and a connecting section, said vent section being connected to one side of the top portion of said valve body through said connecting section.

5. An automotive fuel system comprising a fuel tank and a refuelling limit valve and a breather valve arranged in the fuel tank, characterised by further comprising a fuel tank pressure control valve as claimed in any one of claims 1 to 4, said pressure control valve being mounted on an outside surface of the fuel tank.