A device for assisting the evaporation of fuel

Abstract

The utility model discloses a kind of devices for assisting fuel evaporation, which belongs to the technical field of automobile manufacturing. It mainly includes fuel tank, fuel tank oil outlet end sealingly connected with oil pipe one, oil pipe one end sealingly connected with stop valve, the outlet end of stop valve sealingly connected with oil pipe two, and oil pipe two one end sealingly connected with fuel vapor metering device;The fuel vapor metering device includes a meter housing, a metering sensor is fixedly connected to one side of the meter housing, the sensing end of the metering sensor is located inside the meter housing, a bracket is fixedly connected to the open end of the meter housing, a bracket opening is formed in the middle of the bracket, a meter diaphragm is movably connected in the bracket opening, a spring is movably connected to the upper end of the meter diaphragm, a meter bottom cover that is sealingly connected to the meter housing is provided at the upper end of the spring, and the inside of the meter bottom cover is in contact with the spring. The utility model can more accurately calculate the state of fuel vapor absorption by the carbon canister by installing a fuel vapor metering device between the stop valve and the carbon canister.

Description

Technical Field

[0001] This utility model belongs to the field of automobile manufacturing technology, and more specifically, it relates to a device for assisting fuel evaporation. Background Technology

[0002] Current technology involves adding a shut-off valve between the fuel tank and the charcoal canister to keep fuel vapor inside the fuel tank. When a specific pressure is reached, the shut-off valve opens, releasing pressure into the charcoal canister. However, this process lacks precise control over the amount of fuel vapor, and the saturation level of the charcoal canister cannot be monitored. The saturation level can only be estimated based on the increase in fuel consumption during vehicle operation.

[0003] To address the aforementioned technical problems, this application proposes a solution. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a device for assisting fuel evaporation, which can more accurately calculate the state of fuel vapor absorption by the charcoal canister by installing a fuel vapor metering device between the shut-off valve and the charcoal canister.

[0005] The aforementioned auxiliary fuel evaporation device includes a fuel tank, an oil pipe connected in a sealed manner to the oil outlet end of the fuel tank, a shut-off valve connected in a sealed manner to one end of the oil pipe, an oil pipe connected in a sealed manner to the outlet end of the shut-off valve, and a fuel vapor metering device connected in a sealed manner to one end of the oil pipe. The fuel vapor metering device includes a meter housing, a metering sensor fixedly connected to one side of the meter housing, the sensing end of the metering sensor being located inside the meter housing, a bracket fixedly connected to the open end of the meter housing, the bracket having a hollow design, a bracket opening in the middle of the bracket, a meter diaphragm movably connected inside the bracket opening, a spring movably connected to the upper end of the meter diaphragm, a meter bottom cover sealed to the meter housing at the upper end of the spring, the inside of the meter bottom cover abutting against the spring.

[0006] Preferably, the measuring diaphragm includes a canopy, the maximum outer diameter of which is the same as the inner diameter of the measuring device housing, and a handle is fixedly connected to one end of the canopy. A limit switch is fixedly connected to the handle, and the outer diameter of the limit switch is larger than the support opening.

[0007] Preferably, the bottom of the meter housing is sealed with an oil inlet, which is sealed to an oil pipe two. The bottom cover of the meter is sealed with an oil outlet, one end of which is sealed to an oil pipe three, and one end of the oil pipe three is sealed to a charcoal canister.

[0008] Preferably, the charcoal canister, shut-off valve, and fuel vapor metering device are all fixedly connected to the fuel tank.

[0009] Preferably, the fuel tank has a mounting bracket on its side that is fixedly connected to the vehicle chassis.

[0010] Preferably, the meter diaphragm is made of high-temperature resistant rubber.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention adds a fuel vapor metering device between the shut-off valve and the charcoal canister. This device collects gasoline vapor and releases it into the charcoal canister. The volume of the charcoal canister is an integer multiple of the volume of the fuel vapor metering device. The fuel vapor metering device integrates a counter and a sensor. When the fuel vapor metering device collects a certain number of times, it sends a signal to the ECU. The ECU then reminds the driver to start the engine to desorb the fuel vapor from the charcoal canister when starting the vehicle. This allows for better monitoring of the charcoal canister's fuel vapor absorption status, determining when desorption is needed and how much space remains for adsorption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the fuel vapor metering device in this utility model. Figure 3 This is a schematic diagram of the meter housing. Figure 4 This is a schematic diagram of the structure of the meter diaphragm.

[0013] In the diagram: 1. Fuel tank; 2. Mounting bracket; 3. Fuel pipe one; 4. Shut-off valve; 5. Fuel pipe two; 6. Fuel vapor metering device; 601. Meter bottom cover; 6011. Fuel outlet; 602. Spring; 603. Meter diaphragm; 6031. Umbrella cover; 6032. Umbrella handle; 60321. Limit switch; 604. Metering sensor; 605. Meter housing; 606. Fuel inlet; 607. Bracket; 6071. Bracket opening; 7. Fuel pipe three; 8. Charcoal canister. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0015] like Figures 1 to 4As shown, an auxiliary fuel evaporation device includes a fuel tank 1. A fuel pipe 3 is sealed to the outlet of the fuel tank 1, and a shut-off valve 4 is sealed to one end of the fuel pipe 3. A second fuel pipe 5 is sealed to the outlet of the shut-off valve 4, and a fuel vapor metering device 6 is sealed to one end of the second fuel pipe 5. By installing the fuel vapor metering device 6, the state of fuel vapor absorption by the charcoal canister can be accurately detected, indicating when desorption is needed and how much capacity remains in the charcoal canister for adsorption. The fuel vapor metering device 6 includes a metering housing 605. A metering sensor 604 is fixedly connected to one side of the metering housing 605, with its sensing end located inside the metering housing 605. A bracket 607 is fixedly connected to the open end of the metering housing 605, and the bracket 607 has a hollow design to facilitate the entry and exit of fuel vapor. The bracket 607 has a bracket opening 6071 in the middle, and a metering diaphragm 603 is movably connected inside the bracket opening 6071. In this invention, the metering diaphragm 603 is made of high-temperature resistant rubber to achieve a higher seal at the metering housing 605. The metering diaphragm 603 extends and retracts within the bracket opening 6071. A spring 602 is movably connected to the upper end of the metering diaphragm 603, and a metering bottom cover 601, which is sealed to the metering housing 605, is located above the spring 602. The inside of the metering bottom cover 601 abuts against the spring 602. When no fuel vapor enters or exits the fuel vapor metering device 6, the spring presses against the metering diaphragm 603 to create a closed space. When fuel vapor enters or exits the fuel vapor metering device 6, the fuel vapor compresses the metering diaphragm 603 and the spring 602, allowing the fuel vapor to enter and exit the fuel vapor metering device 6 normally. The metering diaphragm 603 includes a cover 6031, the maximum outer diameter of which is the same as the inner diameter of the metering housing 605. A handle 6032 is fixedly connected to one end of the cover 6031, and a limit switch 60321 is fixedly connected to the handle 6032. The outer diameter of the limit switch 60321 is larger than the support opening 6071. The main function of the limit switch 60321 is to allow the cover 6031 to move a limited distance under the interaction of fuel vapor and spring 602.

[0016] The bottom of the meter housing 605 is sealed with an oil inlet 606, which is sealed to oil pipe 5. The bottom cover 601 of the meter is sealed with an oil outlet 6011, one end of which is sealed to oil pipe 7, and the other end of oil pipe 7 is sealed to a charcoal canister 8. The charcoal canister 8, the shut-off valve 4, and the fuel vapor metering device 6 are all fixedly connected to the fuel tank 1. The side of the fuel tank 1 is provided with a mounting bracket 2 that is fixedly connected to the vehicle chassis. The fuel tank 1 is fixed to the vehicle chassis by bolts on the mounting bracket 2.

[0017] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for assisting fuel evaporation, comprising a fuel tank (1), characterized in that: The fuel tank (1) is sealed to the oil outlet end with oil pipe one (3), one end of oil pipe one (3) is sealed to the shut-off valve (4), the outlet end of the shut-off valve (4) is sealed to the oil pipe two (5), and one end of oil pipe two (5) is sealed to the fuel vapor metering device (6). The fuel vapor metering device (6) includes a meter housing (605), a metering sensor (604) is fixedly connected to one side of the meter housing (605), the sensing end of the metering sensor (604) is located inside the meter housing (605), a bracket (607) is fixedly connected to the open end of the meter housing (605), the bracket (607) adopts a hollow design, a bracket opening (6071) is opened in the middle of the bracket (607), a metering diaphragm (603) is movably connected inside the bracket opening (6071), a spring (602) is movably connected to the upper end of the metering diaphragm (603), a metering bottom cover (601) is provided on the upper end of the spring (602) and sealed to the meter housing (605), the inside of the metering bottom cover (601) abuts against the spring (602).

2. The device for assisting fuel evaporation according to claim 1, characterized in that: The metering diaphragm (603) includes a canopy (6031), the maximum outer diameter of which is consistent with the inner diameter of the metering housing (605). A handle (6032) is fixedly connected to one end of the canopy (6031), and a limiter (60321) is fixedly connected to the handle (6032). The outer diameter of the limiter (60321) is larger than that of the bracket opening (6071).

3. The device for assisting fuel evaporation according to claim 1, characterized in that: The bottom of the meter housing (605) is sealed with an oil inlet (606), the oil inlet (606) is sealed with an oil pipe (5), the bottom cover (601) of the meter is sealed with an oil outlet (6011), one end of the oil outlet (6011) is sealed with an oil pipe (7), and one end of the oil pipe (7) is sealed with a carbon canister (8).

4. The device for assisting fuel evaporation according to claim 3, characterized in that: The charcoal canister (8), shut-off valve (4), and fuel vapor metering device (6) are all fixedly connected to the fuel tank (1).

5. The apparatus for assisting fuel evaporation according to claim 1, characterized in that: The fuel tank (1) is provided with a mounting bracket (2) on its side that is fixedly connected to the vehicle chassis.

6. The apparatus for assisting fuel evaporation according to claim 1, characterized in that: The metering diaphragm (603) is made of high-temperature resistant rubber.

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