CN213870062U

CN213870062U - Structure for reducing risk of carbon canister oil inlet

Info

Publication number: CN213870062U
Application number: CN202023166614.7U
Authority: CN
Inventors: 贺连鹏; 常健; 高亮; 陈发祥
Original assignee: Chongqing Jinkang Sailisi New Energy Automobile Design Institute Co Ltd
Current assignee: Chongqing Jinkang Sailisi New Energy Automobile Design Institute Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-03
Anticipated expiration: 2030-12-24

Abstract

The utility model relates to the technical field of automobile fuel tanks, in particular to a structure for reducing the risk of fuel feeding of a carbon canister, which comprises a fuel tank shell and an evaporating pipe, wherein a vent hole is arranged on the fuel tank shell, one end of the evaporating pipe is arranged on the vent hole, the other end of the evaporating pipe is provided with a safety valve, the safety valve is fixed on the fuel tank shell, a buffer tank is arranged between the safety valve and the vent hole, two ends of the buffer tank are respectively communicated with the evaporating pipe, the bottom of the buffer tank is provided with a membrane one-way valve, fuel flows back to the inside of the fuel tank under the action of the membrane one-way valve after entering the buffer tank, thereby avoiding the influence of the fuel flowing out of the vent hole into the carbon canister on the carbon canister, the arrangement of the buffer tank and the membrane one-way valve ensures that a gas-liquid separator is not required, the difficulty of the position of the carbon canister is reduced.

Description

Structure for reducing risk of carbon canister oil inlet

Technical Field

The utility model relates to an automobile oil tank technical field, especially a structure that reduces canister oil feed risk.

Background

Along with the upgrading of emission regulations, the emission of a gasoline vehicle fuel system is stricter and stricter, so that the design of the fuel system focuses on reducing the flow resistance from an oil tank to a carbon tank pipeline, the risk of the oil inlet of the carbon tank is increased, the emission standard exceeding can be caused after the oil inlet of the carbon tank, and meanwhile, the power system is in failure.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: to prior art exist to avoiding in the fuel gets into the charcoal jar and adopt vapour and liquid separator's mode, vapour and liquid separator and charcoal jar arrange the great problem of the degree of difficulty, provide a structure that reduces charcoal jar oil feed risk.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a reduce structure of charcoal canister oil feed risk, includes oil tank shell and evaporating pipe, be provided with the blow vent on the oil tank shell, evaporating pipe one end intercommunication the blow vent, the evaporating pipe other end intercommunication has the relief valve, the relief valve is fixed on the oil tank shell, be provided with the buffer tank on the evaporating pipe, the circulation cross sectional area of buffer tank is greater than the circulation cross sectional area of evaporating pipe, the bottom of buffer tank is provided with the diaphragm check valve.

As the utility model discloses an optimal scheme, still be provided with vapour and liquid separator on the evaporating pipe, vapour and liquid separator sets up the buffer tank with between the intercommunication route of relief valve, vapour and liquid separator fixes on the oil tank casing, when the fuel rocked in the oil tank, liquid fuel and gaseous fuel entered into vapour and liquid separator through the relief valve, carried out gas-liquid separation to further reduce the fuel that gets into in the buffer tank, inside the fuel flowed into the oil tank through diaphragm formula check valve in the buffer tank, through the dual guarantee of vapour and liquid separator and buffer tank, effectively reduced the phenomenon that the fuel got into the charcoal jar, ensured that the charcoal jar can effectively absorb the gas fuel of evaporation, reduced the fuel emission.

As the utility model discloses a preferred scheme, the relief valve includes GVV valve and FLVV valve, the GVV valve with the FLVV valve is respectively through the tube coupling on the evaporating pipe, and the GVV valve is exactly the rollover valve, and the FLVV valve is exactly to refuel the control valve of limiting quantity, guarantees through GVV valve and FLVV valve that the inside and outside atmospheric pressure of oil tank is the same, avoids the inside fuel evaporation of oil tank too much to cause the pressure increase, reduces the emergence of incident.

As the utility model discloses an optimal scheme, be provided with the strengthening rib on the oil tank casing, promoted the structural strength of oil tank casing.

As the utility model discloses an optimal scheme, the lower part of oil tank shell is provided with the turn-ups, through the body coupling of turn-ups and oil tank, makes things convenient for the installation of oil tank shell.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. set up buffer tank and diaphragm check valve between relief valve and the blow vent on the oil tank casing, start or go to when jolting highway section fuel and rocking at the car, fuel and steam pass through in the relief valve gets into the evaporating pipe, and flow along the evaporating pipe, the fuel flows back to inside the oil tank under diaphragm check valve's effect after getting into the buffer tank, thereby avoid the fuel to flow out the blow vent and get into the charcoal canister and cause the influence to the charcoal canister, steam passes through the evaporating pipe and the blow vent is arranged to outside charcoal canister in, steam is absorbed by the charcoal canister, reduce the emission of steam, arrange of buffer tank and diaphragm check valve makes and need not install vapour and liquid separator in the oil tank outside, it requires to reduce to arrange the position, make arranging the position of charcoal canister also need not special restriction, the degree of difficulty of charcoal canister position has been reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an isometric view of the present invention;

the labels in the figure are: 1-oil tank shell, 2-evaporating pipe, 3-vent, 4-safety valve, 5-buffer tank, 6-diaphragm one-way valve, 7-gas-liquid separator, 8-GVV valve, 9-FLVV valve, 10-reinforcing rib and 11-flanging.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

As shown in fig. 1 and 2, a structure for reducing the risk of fuel entering into a carbon canister includes a fuel tank housing 1 and an evaporation tube 2, a vent 3 is provided on the fuel tank housing 1, one end of the evaporation tube 2 is communicated with the vent 3, the other end of the evaporation tube 2 is communicated with a safety valve 4, the safety valve 4 is fixed on the fuel tank housing 1, a buffer tank 5 is provided on the evaporation tube 2, the flow cross-sectional area of the buffer tank 5 is larger than that of the evaporation tube 2, a membrane check valve 6 is provided at the bottom of the buffer tank 5, fuel vapor and liquid fuel inside the fuel tank enter the evaporation tube 2 through the safety valve, the liquid fuel enters the buffer tank 5 and flows back into the fuel tank through the membrane check valve 6 at the bottom of the buffer tank 5, and the fuel vapor can not pass through the membrane check valve 6 and can only be discharged through the vent 3.

As shown in fig. 1 and 2, a gas-liquid separator 7 is further disposed on the evaporation tube 2, the gas-liquid separator 7 is disposed between the buffer tank 5 and the communication passage of the safety valve 4, the gas-liquid separator 7 is fixed on the tank housing 1, when fuel in the tank shakes, liquid fuel and gaseous fuel enter the gas-liquid separator 7 through the safety valve 4 to perform gas-liquid separation, so that fuel entering the buffer tank 5 is further reduced, fuel flows into the tank through the diaphragm check valve 6 in the buffer tank 5, and through the double protection of the gas-liquid separator 7 and the buffer tank 5, the phenomenon that fuel enters the canister is effectively reduced, the canister can effectively absorb evaporated gas fuel, and the discharge amount of fuel is reduced.

In this embodiment, the safety valve 4 includes an GVV valve 8 and an FLVV valve 9, the GVV valve 8 and the FLVV valve 9 are respectively connected to the evaporation tube 2 through a pipeline, the GVV valve 8 is a rollover valve, the FLVV valve 9 is an oiling limit control valve, and the GVV valve 8 and the FLVV valve 9 ensure that the air pressures inside and outside the oil tank are the same, so that pressure increase caused by excessive evaporation of fuel inside the oil tank is avoided, and safety accidents are reduced.

In this embodiment, diaphragm check valve 6 sets up one side that is close to the oil tank bottom of buffer tank 5, after oil tank casing 1 fixes on the oil tank body, during the fuel in the oil tank rocked and gets into the relief valve, and then get into buffer tank 5, diaphragm check valve 6 backward flow to the oil tank bottom in the fuel accessible buffer tank 5 to fuel vapour is arranged to the outside canister of oil tank in through evaporating pipe 2 and blow vent 3, avoids the fuel to get into the canister and causes the inefficacy of canister, effectively reduces fuel vapour's emission.

As shown in fig. 1 and 2, in the present embodiment, the tank shell 1 is provided with the reinforcing ribs 10, so that the structural strength of the tank shell is improved.

As shown in fig. 1 and fig. 2, in the present embodiment, a flange 11 is disposed at a lower portion of the fuel tank shell 1, and the flange 11 is connected to the body of the fuel tank, so as to facilitate installation of the fuel tank shell.

The specific working process of the application is as follows: fix oil tank shell 1 on the oil tank body, the charcoal canister that communicates with vent 3 is set up in oil tank shell 1 outside, when the automobile starts or goes to the highway section fuel of jolting and rock, fuel and steam pass through in 4 entering evaporating pipes 2 of relief valve, and flow along evaporating pipes 2, fuel flows back to inside the oil tank under diaphragm check valve 6's effect after getting into buffer tank 5, fuel can not get into the charcoal canister through vent 3 and cause the influence to the charcoal canister, steam passes through evaporating pipes 2 and vent 3 arranges to outside in the charcoal canister, steam is absorbed by the charcoal canister, reduce the emission of steam, buffer tank 5 and diaphragm check valve 6 arrange to make and need not to install vapour and liquid separator or vapour and liquid separator and can install at will the oil tank outside, there is not the restriction of position, make the position of charcoal canister also need not special restriction, the degree of difficulty that the charcoal canister position was arranged has been reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a reduce structure of canister oil feed risk, its characterized in that, includes oil tank casing (1) and evaporating pipe (2), be provided with blow vent (3) on oil tank casing (1), evaporating pipe (2) one end intercommunication blow vent (3), evaporating pipe (2) other end intercommunication has relief valve (4), relief valve (4) are fixed on oil tank casing (1), be provided with buffer tank (5) on evaporating pipe (2), the circulation cross sectional area of buffer tank (5) is greater than the circulation cross sectional area of evaporating pipe (2), the bottom of buffer tank (5) is provided with diaphragm check valve (6).

2. The structure for reducing the risk of carbon canister oil feeding according to claim 1, wherein a gas-liquid separator (7) is further disposed on the evaporation tube (2), the gas-liquid separator (7) is disposed between the buffer tank (5) and the communication passage of the safety valve (4), and the gas-liquid separator (7) is fixed on the tank case (1).

3. A structure for reducing the risk of canister oil induction according to claim 1, characterized in that the safety valve (4) comprises GVV valve (8) and FLVV valve (9), the GVV valve (8) and the FLVV valve (9) being connected to the evaporation tube (2) by pipes, respectively.

4. A structure for reducing the risk of canister oil ingress as claimed in claim 1 wherein the tank housing (1) is provided with a stiffener (10).

5. A structure for reducing the risk of carbon canister oil ingress as defined in claim 1 wherein the lower part of the tank housing (1) is provided with a flange (11).