CN118105790A - Carbon tank prefilter and carbon tank vent secondary filter system - Google Patents

Abstract

The invention discloses a carbon tank primary filter and a carbon tank vent secondary filter system, wherein the carbon tank primary filter comprises an upper cover, a lower shell, a filter plate and a locking component, a plurality of vents are arranged on the upper cover, a plurality of air inlet bosses are arranged on the inner side of the upper cover, an air outlet interface is arranged on the lower shell, an air outlet boss and a plurality of baffles are arranged in the lower shell, the air inlet bosses, the air outlet bosses and the baffles form an S-shaped space in the upper cover and the lower cover in a matched mode, the air inlet bosses and the baffles cooperate with the filter plate to filter air entering the carbon tank primary filter, the carbon tank vent secondary filter system comprises the carbon tank primary filter and a secondary filter, the carbon tank primary filter is arranged at the head of an oil filling pipe and is positioned on the inner side of an oil filling small door, the air outlet interface is communicated with the secondary filter, and the secondary filter is communicated with an OBD diagnosis module and the carbon tank. According to the carbon tank primary filter and the carbon tank vent secondary filter system, the carbon tank vent hole can be prevented from being blocked.

Description

Carbon tank prefilter and carbon tank vent secondary filter system

Technical Field

The invention relates to the technical field of vehicle equipment, in particular to a carbon tank primary filter and a carbon tank vent secondary filter system.

Background

The existing gasoline vehicle is provided with a carbon tank for absorbing gasoline vapor generated by volatilization of fuel in the fuel tank, so that pressure balance in the fuel tank is realized, the carbon tank is provided with a vent, and the vent is simultaneously connected with an OBD diagnosis module. Because of the negative pressure effect generated by desorption when the engine works, external air enters the carbon tank from the air vent through the OBD diagnosis module, and gasoline vapor adsorbed by the carbon tank is brought into the engine combustion chamber for combustion. The carbon tank vent is easy to soak, is puggaree or is blocked by dust, can enable the oil tank to produce negative pressure when the engine is desorbed, and then causes the oil tank to be damaged, and simultaneously the OBD diagnosis module breaks down, and then fails.

Chinese patent CN113882975A discloses a dust filter, the scheme is designed with a special water outlet, but the structure is complex, and the filter inlet is located on the upper part of the tyre, the inner layer of the wheel cover, the dust carried by the wheel is easy to enter the carbon tank through the filter under severe working conditions, and the vent of the carbon tank is blocked.

Chinese patent CN21600871U discloses a carbon tank dust filter and car, and this scheme design only has one-level to filter, and arranges the position and be located chassis or tire top, and the dust that the wheel was taken up easily gets into the carbon tank through the filter under the abominable operating mode, causes the carbon tank vent to block up, and this filter needs periodic maintenance to change, has increased maintenance cost.

Disclosure of Invention

The invention aims to provide a carbon tank primary filter and a carbon tank vent secondary filter system, which solve the problem of blockage of the existing carbon tank vent.

In order to solve the technical problems, the invention adopts the following technical scheme:

A carbon canister prefilter comprising: the device comprises an upper cover, a lower shell, a filter screen and a locking component.

The upper cover is provided with three air outlets, each air outlet comprises a first air inlet, a second air inlet and a third air inlet, the first air inlets, the second air inlets and the third air inlets are distributed on the upper cover at intervals along the circumferential direction, and air inlet bosses are arranged on the inner sides of the upper cover respectively;

The lower shell is matched with the upper cover to form an arc-shaped structure, an inner space is formed between the upper cover and the lower shell, an air outlet port, a plurality of baffles and a drainage boss are arranged in the lower shell, the air outlet port is provided with the air outlet boss, the baffles are distributed in the lower shell at intervals, and the air inlet boss, the air outlet boss and the baffles form an S-shaped space at intervals, so that air flow in the inner space is disturbed;

The locking component is used for fixing the arc-shaped structure formed by matching the upper cover with the lower shell at the head of the automobile oil filling pipe.

In some embodiments, a drainage boss is arranged in the lower shell, and the lowest part of the drainage boss is positioned at the same position as the third air inlet, so that accumulated water in the primary filter of the carbon tank is drained through the drainage boss and the third air inlet.

In some embodiments, the baffle is connected to a single side of the side wall of the lower shell, a gap is left on the other side of the baffle, a gap is left between the air outlet boss and the side wall of the lower shell, adjacent gaps are distributed in a staggered manner, and the baffle, the air outlet boss and the air inlet boss are used for forming the internal space into a bent shape at intervals and for turbulent air flowing in the internal space.

In some embodiments, the locking assembly is a shackle that snap fits with the arcuate structure to form a circular ring.

In some embodiments, the carbon tank prefilter is further provided with two rubber pads respectively attached to the upper cover and the lock catch.

In some embodiments, a gasket is also provided, the gasket being disposed between the upper cover and the lower housing.

A secondary filter system for a carbon tank vent comprises a carbon tank primary filter and a secondary filter.

The carbon tank primary filter is arranged at the head part of the automobile oil filling pipe, the air inlet of the carbon tank primary filter is positioned inside the automobile oil filling small door, the outside is shielded by the automobile oil filling small door cover plate,

The carbon tank primary filter is communicated with the secondary filter through a pipeline, the carbon tank primary filter is used for preliminarily filtering air, the secondary filter is connected with the OBD diagnosis module through a pipeline, and the OBD diagnosis module is communicated with an automobile carbon tank vent through a pipeline.

The invention has the beneficial effects that:

The carbon tank primary filter is provided with the air inlet through the three air inlets of the upper cover, the filter screen is used for filtering air, and then the air is discharged from the air outlet port of the lower shell, and the upper cover and the lower shell are internally provided with the air inlet boss, the air outlet boss and the baffle plate, so that the air entering the carbon tank primary filter is disturbed, and dust and muddy water mixed in the air are further blocked.

A drainage boss is arranged in the lower shell, and accumulated water in the carbon tank primary filter can flow out from the third air inlet through the drainage boss, so that the accumulated water in the carbon tank primary filter is prevented.

The carbon tank primary filter is convenient to assemble and disassemble, high in reliability and low in maintenance cost.

According to the carbon tank vent secondary filter system, air is filtered through the carbon tank primary filter and the secondary filter, so that air entering the carbon tank is filtered, and the damage of an oil tank and the failure of an OBD diagnosis module are avoided. The air inlet of the carbon tank primary filter is arranged at the outer side of the vehicle body and inside the small oiling door, and the baffle plate of the small oiling door plays a role in shielding, so that a large amount of muddy water and dust can be prevented from entering the carbon tank primary filter under severe environment, and the blocking prevention effect is realized. Due to the arrangement of the carbon tank primary filter, the service life of the secondary filter is prolonged, the periodic maintenance and replacement of the existing vehicle in six thousand kilometers in three years is avoided, and the maintenance cost is reduced.

Description of the drawings with coloured lines

FIG. 1 is a schematic illustration of a carbon canister prefilter according to an embodiment of the present invention;

FIG. 2 is an exploded view of a carbon canister prefilter according to an embodiment of the present invention;

FIG. 3 is a schematic view of an upper cover according to an embodiment of the present invention;

FIG. 4 is a schematic view of a lower shell of an embodiment of the present invention;

FIG. 5 is a front view of a carbon canister prefilter mounting location in accordance with an embodiment of the present invention;

FIG. 6 is a side view of a carbon canister prefilter mounting location in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of a two-stage filtration system for a carbon canister vent in accordance with an embodiment of the invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

This example discloses a carbon canister prefilter. The carbon canister primary filter 100 of the present embodiment includes: the device comprises an upper cover 1, a lower shell 2, a filter screen 3 and a locking component 4.

Specifically, as shown in fig. 1-3, a first air inlet 5, a second air inlet 6 and a third air inlet 7 are arranged on the upper cover 1, the first air inlet 5, the second air inlet 6 and the third air inlet 7 are distributed on the upper cover 1 at intervals along the axial direction, and air inlet bosses 8 are further arranged on the inner side of the upper cover 1 at the first air inlet 5 and the second air inlet 6.

The upper cover 1 and the lower shell 2 are buckled and matched to form an arc-shaped structure, and an inner space is formed between the upper cover 1 and the lower shell 2. The outer side of the lower shell 2 is provided with an air outlet port 9, and the inner side of the lower shell 2 is provided with an air outlet boss 10 at the air outlet port 9. The inner side of the lower shell 2 is also provided with a plurality of baffles 11 which are distributed at intervals along the circumferential direction. Gaps are reserved between the air outlet boss 10 and the side wall of the lower shell 2, the baffle 11 is connected with one side of the side wall of the lower shell 2, gaps are reserved between the other side of the baffle and the side wall of the lower shell 2, adjacent gaps are distributed in a staggered mode, and the gaps are used for passing air. The air inlet boss 8, the air outlet boss 10 and the baffle 11 are used for forming an S-shaped space in the air inlet, so that air turbulence in the carbon tank primary filter 100 can be realized, and dust and muddy water mixed in the air are further blocked. The lower shell 2 is also internally provided with a drainage boss 12, and the lowest part of the drainage boss 12 and the third air inlet 7 are positioned at the same position, so that accumulated water in the carbon tank primary filter 100 can be discharged through the drainage boss 12 and the third air inlet 7 under the action of gravity, and accumulated water is prevented.

The filter screen 3 is fixed in the lower shell 2, and a sealing gasket 13 is arranged between the upper cover 1 and the lower shell 2 to prevent dust from entering the carbon tank primary filter 100 from a gap.

The locking assembly 4 is a latch that snap fits with the arcuate structure to form a circular ring to secure the carbon canister prefilter 100 to the vehicle filler tube 300.

The upper cover 1 and the lock catch are respectively provided with a rubber pad 14, and the rubber pad 14 is used for ensuring that the carbon tank primary filter 100 is assembled on the metal plate inside the small oiling door 400 and also has the functions of shock absorption and clamping.

Embodiment two:

The embodiment discloses a carbon tank vent secondary filter system, and carbon tank vent secondary filter system includes carbon tank primary filter 100 and secondary filter 200, and carbon tank primary filter 100 is carbon tank primary filter 100 in the above-mentioned embodiment, and secondary filter 200 is car secondary air filter, and carbon tank primary filter 100 installs at car filler neck 300 head, is located the refuel door 400 inboard, and the outside shields through refuel door 400 baffle, can prevent a large amount of muddy water and dust from getting into carbon tank primary filter 100. The carbon tank primary filter 100 is provided with an air inlet at the outer side, an air outlet port 9 is communicated with the secondary filter 200 through a pipeline, and the secondary filter 200 is communicated with the automobile OBD diagnosis module 500 and the carbon tank 600 air vent.

According to the carbon tank vent secondary filter system provided by the embodiment of the invention, the impurity content in the air entering the secondary filter 200 is greatly reduced through the filtration of the carbon tank primary filter 100, so that the service life of the secondary filter 200 is prolonged, and the periodic maintenance and replacement of six thousand kilometers in three years of the existing vehicle are avoided; due to the combined action of the carbon tank primary filter 100 and the secondary filter 200, the cleanliness of air entering the carbon tank air vent is improved, the carbon tank air vent is prevented from being blocked, the failure rate of the carbon tank air vent OBD diagnostic module is reduced, the service life of the carbon tank is prolonged, and the maintenance cost of the automobile is reduced.

The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.

In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.

If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A carbon canister prefilter, comprising:

The upper cover is provided with three air outlets, the three air outlets comprise a first air inlet, a second air inlet and a third air inlet, the first air inlet, the second air inlet and the third air inlet are circumferentially distributed on the upper cover at intervals, and air inlet bosses are arranged on the inner sides of the upper cover respectively;

The lower shell is matched with the upper cover to form an arc-shaped structure, an inner space is formed between the upper cover and the lower shell, an air outlet port, a plurality of baffles and a drainage boss are arranged in the lower shell, the air outlet port is provided with the air outlet boss, the baffles are distributed in the lower shell at intervals, and the air inlet boss, the air outlet boss and the baffles divide the inner space into an S shape, so that air flow in the inner space is disturbed;

the filter screen is arranged in the lower shell;

The locking component is used for fixing the arc-shaped structure formed by matching the upper cover with the lower shell at the head of the automobile oil filling pipe.

2. The carbon canister prefilter of claim 1, wherein a drain boss is provided in said lower housing, and the lowest part of said drain boss is located at the same position as said third air inlet, so that the accumulated water in the carbon canister prefilter is drained through the drain boss and the third air inlet.

3. The carbon canister prefilter of claim 2, wherein said baffle is connected to a side wall of said lower shell on one side and a gap is left on the other side, said air outlet boss is left with a gap between the side wall of said lower shell, adjacent gaps are staggered, said baffle, said air outlet boss and said air inlet boss space said interior space in a bent shape for turbulent air flowing in the interior space.

4. A carbon canister prefilter as claimed in claim 3, wherein said locking assembly is a latch that snap fits with said arcuate structure to form a circular ring.

5. The carbon canister prefilter of claim 4, wherein said carbon canister prefilter is further provided with two rubber pads attached to said upper cover and said latch, respectively.

6. The carbon canister prefilter of claim 5, further provided with a gasket disposed between said upper cover and said lower housing.

7. A carbon canister vent secondary filtration system, comprising:

a carbon tank primary filter, wherein the carbon tank primary filter is the carbon tank primary filter of claim 6, the carbon tank primary filter is arranged at the head part of an automobile oil filling pipe, an air inlet of the carbon tank primary filter is positioned inside an automobile oil filling small door, the outside of the carbon tank primary filter is shielded by an automobile oil filling small door cover plate,

The carbon tank primary filter is communicated with the secondary filter through a pipeline, the carbon tank primary filter is used for preliminarily filtering air, the secondary filter is connected with the OBD diagnosis module through a pipeline, and the OBD diagnosis module is communicated with an automobile carbon tank vent through a pipeline.