CN111197542A - Oil gas adjusting device of fuel evaporation system, fuel evaporation system and vehicle - Google Patents
Oil gas adjusting device of fuel evaporation system, fuel evaporation system and vehicle Download PDFInfo
- Publication number
- CN111197542A CN111197542A CN201811379174.8A CN201811379174A CN111197542A CN 111197542 A CN111197542 A CN 111197542A CN 201811379174 A CN201811379174 A CN 201811379174A CN 111197542 A CN111197542 A CN 111197542A
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- valve body
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- air supply
- breathing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
Abstract
The present disclosure relates to an oil gas regulating device for a fuel evaporation system, a fuel evaporation system and a vehicle, the oil gas regulating device comprising a housing and a valve body arranged in the housing, the housing being provided with an air inlet and an air supply port and a breathing port, the aperture of the air supply port being larger than the aperture of the breathing port, the valve body having a first position and a second position, the valve body blocking the air supply port and avoiding the breathing port at the first position so that the breathing port communicates with the air inlet; the valve body avoids the air supply port at the second position, so that the air supply port is communicated with the air inlet; the valve body is configured to: the valve body moves toward the second position when the pressure in the housing increases above a predetermined threshold to establish communication between the air inlet and the air outlet, and remains in the first position when the pressure in the housing is not greater than the threshold and the canister is not desorbed. The oil gas adjusting device of the fuel evaporation system can solve the problem that the carbon canister is overloaded when oil gas in the oil tank flows into the carbon canister without limitation.
Description
Technical Field
The disclosure relates to the field of automobile manufacturing, in particular to an oil-gas adjusting device of a fuel evaporation system, the fuel evaporation system and a vehicle.
Background
Since gasoline is a volatile liquid, fuel tanks are often filled with fuel vapors at ambient temperatures, and in order to introduce fuel vapors for combustion and to prevent them from evaporating into the atmosphere, a canister is typically provided between the fuel tank and the engine for recovering the fuel vapors. In order to meet the national six regulations, the emission limit of a fuel automobile has a relatively strict requirement, which requires that a carbon canister has a higher working capacity requirement on the recovery of fuel vapor, however, fuel vapor in the fuel tank flows into the carbon canister without limitation, so that the carbon canister is adsorbed and saturated, and redundant oil gas is discharged into the atmosphere, and finally, the emission of hydrocarbons in automobile exhaust exceeds the standard.
Disclosure of Invention
The oil gas regulating device of the fuel evaporation system can solve the problem that hydrocarbon in vehicle emissions exceeds the standard due to the fact that adsorption saturation of a carbon canister is caused by the fact that oil gas in an oil tank flows into the carbon canister unlimitedly and accordingly emission of residual oil gas is caused.
In order to achieve the above object, the present disclosure provides an oil-gas regulating device for a fuel evaporation system, the oil-gas regulating device including a housing and a valve body disposed in the housing, the housing being provided with an air inlet for communicating the housing with a fuel tank, and an air supply port and a breathing port for communicating with a canister, an aperture of the air supply port being larger than an aperture of the breathing port, the valve body having a first position and a second position, in the first position, the valve body plugging the air supply port and avoiding the breathing port so that the breathing port communicates with the air inlet; in the second position, the valve body avoids the air supply port, so that the air supply port is communicated with the air inlet; the valve body is configured to: the valve body moves toward the second position when the pressure in the housing increases above a predetermined threshold to establish communication between the air inlet and the air outlet, and remains in the first position when the pressure in the housing is not greater than the threshold and the canister is not desorbed.
Optionally, the valve body further has a third position in which the valve body blocks the air supply port and the breathing port, the valve body further configured to: when the carbon canister generates negative pressure in a desorption mode, the valve body moves towards the third position to cut off communication between the breathing port and the air inlet.
Optionally, the valve body is configured in a diaphragm shape, an edge of the valve body is attached to an inner side wall of the housing, and the valve body has a first surface facing the air supply opening, and a first plunger portion for blocking the air supply opening and a second plunger portion for blocking the breathing opening are formed on the first surface.
Optionally, the length of the first plunger portion is greater than the length of the second plunger portion, so that when the valve body is located at the first position, the first plunger portion blocks the air supply opening, and meanwhile, the second plunger portion avoids the breathing opening.
Optionally, a liquid collecting cavity for collecting liquefied oil drops is arranged in the inner space of the shell, and the air inlet is communicated with the liquid collecting cavity; the valve body is matched with the liquid collection cavity in shape and can reach the first position, the second position or the third position through reciprocating movement in the liquid collection cavity.
Optionally, the oil-gas adjusting device further comprises an air inlet pipe orifice used for being connected with the fuel tank and an air supply pipe orifice used for being connected with the carbon canister, the air inlet is arranged on the shell, and the air inlet pipe orifice is connected with the shell at the air inlet; the air delivery nozzle is connected to the housing and extends into the housing with a portion on which the air delivery port and the breathing port are both disposed.
Optionally, the hydrocarbon conditioning device further comprises a biasing member by which the threshold value is defined.
Alternatively, the first surface except for the first and second plunger portions faces the air inlet, and the biasing member is attached to a second surface of the valve body opposite to the first surface and at a position corresponding to the first plunger portion to provide the valve body with a spring force facing the air supply port and the breathing port.
On the basis of the technical scheme, the fuel evaporation system comprises a fuel tank and a carbon canister, and further comprises an oil-gas adjusting device for the fuel evaporation system, wherein the air inlet is communicated with the fuel tank, and the air supply opening is communicated with the breathing opening and the carbon canister.
On the basis of the technical scheme, the disclosure further provides a vehicle which is provided with the fuel evaporation system in the technical scheme.
Through the technical scheme, the oil gas regulating device for the fuel oil evaporation system provided by the disclosure is provided with the valve body, when the pressure difference between the shell and the carbon tank does not exceed the preset critical value and the carbon tank is not desorbed, the valve body can seal the air supply port with the larger caliber at the first position and avoid the breathing port with the smaller caliber at the same time, so that the oil gas in the fuel oil tank can be prevented from flowing into the carbon tank without limit through the air supply port with the larger caliber to cause the adsorption saturation of the carbon tank, thereby causing the excessive oil gas to be discharged into the atmosphere and finally causing the excessive discharge of hydrocarbon in the automobile exhaust; when the pressure difference between the shell and the carbon canister is larger than a preset critical value, for example, when the fuel tank is refueled, the concentration of oil gas is increased, the valve body moves towards the second position and can avoid the gas supply port and the breathing port at the same time, and the communication between the gas inlet and the gas supply port is established, so that the oil gas in the shell can rapidly enter the carbon canister through the gas supply port and the breathing port, and oil drops in the oil gas are sufficiently adsorbed by the carbon canister. The fuel evaporation system comprising the oil-gas regulating device provided by the disclosure has the same technical effect as the oil-gas regulating device, and is not repeated herein in order to avoid unnecessary repetition. The vehicle including the above-mentioned fuel evaporation system that this disclosure provided has the same technological effect with this fuel evaporation system, avoids unnecessary repetition, does not describe here in detail.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is an isometric view of an oil and gas regulator assembly of a fuel vaporization system in accordance with an embodiment of the present disclosure;
FIG. 2 is an exploded view of an oil and gas regulator of the fuel vaporization system in accordance with an embodiment of the present disclosure;
FIG. 3 is an exploded view of another angle of an hydro-pneumatic control device of the fuel vaporization system in accordance with an embodiment of the present disclosure;
FIG. 4 is a cross-sectional view of an air adjustment device of the fuel vaporization system in a first operating position in accordance with an embodiment of the present disclosure;
FIG. 5 is a cross-sectional view of an air adjustment device of the fuel vaporization system in a second operating position in accordance with an embodiment of the present disclosure;
FIG. 6 is a cross-sectional view of an air adjustment device of the fuel vaporization system in a third operating position, according to an embodiment of the present disclosure.
Description of the reference numerals
1-main body, 10-liquid collecting cavity, 11-air inlet, 12-air supply port, 13-breathing port, 2-shell cover, 3-valve body, 31-first plunger part, 32-second plunger part, 4-biasing part, 5-air inlet pipe orifice and 6-air supply pipe orifice.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, where nothing is stated to the contrary, the use of directional words such as "upper and lower" generally means up and down in the direction of gravity of the fuel vapor deposition system's hydrocarbon regulating device in the installed state, and "inner and outer" generally means inner and outer with respect to the profile of the respective component; the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for sequential or importance. Furthermore, in the following description, in the drawings, like reference numerals in different drawings denote like elements.
According to the specific embodiment of the present disclosure, an oil gas regulating device for a fuel evaporation system is provided, the oil gas regulating device comprises a housing and a valve body 3 arranged in the housing, the housing is provided with an air inlet 11 for communicating the housing with a fuel tank, and an air supply port 12 and a breathing port 13 for communicating with a canister, the aperture of the air supply port 12 is larger than the aperture of the breathing port 13, the valve body 3 has a first position and a second position, in the first position, the valve body 3 blocks the air supply port 12 and avoids the breathing port 13, so that the breathing port 13 is communicated with the air inlet 11; in the second position, the valve body 3 avoids the air supply port 12, so that the air supply port 12 is communicated with the air inlet 11; the valve body 3 is configured to: when the pressure in the housing increases beyond a predetermined threshold value, the valve body 3 moves towards the second position to establish communication between the air inlet 11 and the air outlet 12, and when the pressure in the housing is not greater than the threshold value and the canister is not desorbed, the valve body 3 remains in the first position, as shown with reference to fig. 1 to 6.
Through the technical scheme, the oil gas regulating device for the fuel oil evaporation system provided by the disclosure is provided with the valve body 3, when the pressure difference between the shell and the carbon canister does not exceed the preset critical value and the carbon canister is not desorbed, the valve body 3 can seal the air supply port 12 with the larger caliber at the first position and avoid the breathing port 13 with the smaller caliber at the same time, so that the oil gas in the fuel oil tank can be prevented from flowing into the carbon canister without limit through the air supply port 12 with the larger caliber to cause that the carbon canister is adsorbed and saturated, thereby causing that redundant oil gas is discharged into the atmosphere, and finally causing that the discharge of hydrocarbon in the automobile exhaust exceeds the standard; when the pressure difference between the shell and the carbon canister is larger than a preset critical value, for example, when the fuel tank is refueled, the oil gas concentration is increased, the valve body 3 moves towards the second position and can simultaneously avoid the air supply port 12 and the breathing port 13, and the communication between the air inlet 11 and the air supply port 12 is established, so that the oil gas in the shell can rapidly enter the carbon canister through the air supply port 12 and the breathing port 13, and oil drops in the oil gas are sufficiently adsorbed by the carbon canister.
In the embodiment provided by the present disclosure, in order to prevent the deformation of the fuel tank caused by the negative pressure generated when the canister is desorbed, the valve body 3 may further have a third position where the valve body 3 blocks the air supply port 12 and the breathing port 13, and the valve body 3 is further configured to: when the canister desorbs to generate negative pressure, the valve body 3 moves toward the third position to cut off the communication between the breathing port 13 and the air inlet 11, as shown in fig. 6. When the charcoal jar desorption produced the negative pressure, valve body 3 can move down in order to seal the intercommunication between air inlet 11 and the charcoal jar under the effect of negative pressure, can prevent on the one hand that the fuel tank that the negative pressure leads to warp, and on the other hand can prevent to be inhaled the charcoal jar that the charcoal jar leads to by a large amount of oil gas in the fuel tank under the negative pressure effect and transship.
In particular embodiments of the present disclosure, the valve body 3 may be configured in any suitable manner. Alternatively, the valve body 3 is configured in a diaphragm shape, an edge of the valve body 3 is attached to an inner side wall of the housing, and has a first surface facing the air supply port 12, on which a first plunger portion 31 for blocking the air supply port 12 and a second plunger portion 32 for blocking the breathing port 13 are formed, as shown with reference to fig. 3 to 6. Wherein the first and second plunger portions 31 and 32 may be configured to be convex toward the air supply port 31 and the breathing port 32, respectively; the diaphragm-shaped valve body 3 may be configured as a diaphragm having a soft and thin edge, and the diameter of the diaphragm may be slightly larger than the inner diameter of the housing to better fit the inner side wall of the housing, and when the diaphragm moves in the housing, the soft and thin edge of the diaphragm may deform along with the movement, thereby reducing friction between the diaphragm and the inner side wall of the housing to reduce noise.
In particular embodiments of the present disclosure, the first and second plunger portions 31, 32 may be configured in any suitable manner. Alternatively, the length of the first plunger portion 31 is greater than that of the second plunger portion 32, so that when the valve body 3 is located at the first position, the first plunger portion 31 blocks the air supply port 12, the second plunger portion 32 avoids the breathing port 13, the height of the first plunger portion 31 protruding along the moving direction of the valve body 3 is greater than the height of the second plunger portion 32 protruding along the moving direction of the valve body 3, and the distances from the air supply port 12 and the breathing port 13 to the first surface are the same, so that when the first plunger portion 31 blocks the air supply port 12 at the first working position, the second plunger portion 32 can open the breathing port 32. Alternatively, the first plunger portion 31 and the second plunger portion 32 have the same height of protrusion in the moving direction of the valve body 3, and the distance from the air supply opening 12 to the first surface is smaller than the distance from the breathing opening 13 to the first surface, so that the second plunger portion 32 can open the breathing opening 32 when the first plunger portion 31 blocks the air supply opening 12 in the first working position, as shown with reference to fig. 4.
In order to collect liquefied oil drops in oil gas, a liquid collecting cavity 10 for collecting the liquefied oil drops can be arranged in the inner space of the shell, and the air inlet 11 is communicated with the liquid collecting cavity 10; the valve body 3 is adapted to the shape of the liquid collection chamber 10 and is moved back and forth in the liquid collection chamber 10 to reach the first position, the second position, or the third position. When the oil gas in the shell is more, the liquefied oil drops in the oil gas can be temporarily stored in the liquid collecting cavity 10 and can flow back to the fuel tank when a certain amount of the liquefied oil drops are accumulated.
In order to communicate the canister of the oil-gas regulating device with the fuel tank, the oil-gas regulating device further comprises an air inlet pipe orifice 5 for connecting with the fuel tank and an air supply pipe orifice 6 for connecting with the canister, an air inlet 11 is arranged on the housing, and the air inlet pipe orifice 5 is connected with the housing at the air inlet 11 to communicate with the housing through the air inlet 11, as shown in fig. 2 to 3; the air supply nozzle 6 is connected to the housing and extends into the housing in a portion on which the air supply opening 12 and the breathing opening 13 are arranged, wherein the air supply opening 12 and the breathing opening 13 can be arranged at a distance from one another.
The hydrocarbon regulating device may further include a biasing member 4, the threshold value being defined by the biasing member 4. As shown with reference to fig. 2 to 6, the biasing member 4 may be a spring, and the threshold value is related to the spring constant of the spring, and thus, a spring having a suitable spring constant may be selected as desired. When the pressure difference between the shell and the carbon canister does not exceed the critical value and the carbon canister is not desorbed, the spring naturally extends, the valve body 3 is positioned at the first position to seal the air supply port 12 and avoid the breathing port 13, and oil gas can enter the carbon canister through the breathing port 13; when the pressure difference between the housing and the canister exceeds the threshold value, the spring is compressed, the valve body 3 moves up to the second position to open the air supply port 12 and the breathing port 13 so that the pressure in the housing is released, and once the pressure difference between the housing and the canister is restored to be less than the threshold value, the valve body 3 returns downward to the first position by the elastic force of the spring to close the air supply port 12.
Alternatively, the portions of the first surface excluding the first plunger portion 31 and the second plunger portion 32 are both directed toward the intake port 11; the biasing member 4 is attached to a second surface of the valve body 3 opposite to the first surface, and is attached at a position corresponding to the first plunger portion 31, providing the valve body 3 with a spring force toward the air supply port 12 and the breathing port 13, as shown with reference to fig. 2 to 6. Wherein the second surface is not subjected to the pressure of the gas pressure, the pressure to which the first and second plunger portions 31, 32 are subjected is derived from the gas pressure in the canister, and the pressure to which the first and second plunger portions 31, 32 are removed from the first surface is derived from the gas pressure in the fuel tank. Therefore, the valve body 3 can be integrally pushed upwards, and the situation that the first surface is inclined due to uneven stress is avoided.
The operating mode of oil gas adjusting device has normally that normal use, fuel tank refuel and three kinds of operating modes of canister desorption, and these three kinds of operating mode correspond to above-mentioned three operating position of valve body 3: during normal use, the valve body 3 only cuts off the communication between the air supply port 12 with a larger caliber and the air inlet port 11 and opens the breathing port 13 with a smaller caliber, and at the moment, the valve body 3 is positioned at the first position, so that oil gas in the fuel tank slowly flows into the carbon canister, and the working pressure of the carbon canister is reduced, which is shown in fig. 4; when the fuel tank is filled with fuel, the pressure in the fuel tank rises sharply to generate a large amount of oil gas, the valve body 3 can open the air supply port 12 and the breathing port 13 at the same time, and the valve body 3 is located at the second position, so that the oil gas in the fuel tank can flow into the carbon canister quickly to release the pressure in the fuel tank, which is shown in fig. 5; when the canister is desorbed, the pressure in the canister is negative pressure, the valve body 3 can simultaneously cut off the communication between the air supply port 12 and the breathing port 13 and the air inlet 11, and the valve body 3 is located at the third position, so that the communication between the fuel tank and the canister can be cut off, the phenomenon that the canister is overloaded when a large amount of oil gas in the fuel tank enters the canister is prevented, and the fuel tank is prevented from being deformed due to overlarge negative pressure, which is shown in fig. 6.
In the embodiments provided in the present disclosure, the aperture of the air supply port 12 and the aperture of the breathing port 13 may be set appropriately as required. Optionally, the ratio of the aperture of the air supply port 12 to the aperture of the breathing port 13 is 5: 1 to 7: 1. I.e. the aperture of the air supply port 12 is much larger than the aperture of the breathing port 13, in order to be able to accommodate the rapid and large outflow of oil and gas from the fuel tank in said second operating position. In the embodiment of the present disclosure, the ratio of the diameters of the air supply port 12 and the breathing port 13 is 6: 1, when the valve body 3 is located at the second working position, the flow of the air supply port 12 is about 38L/min, the flow of the breathing port 13 is about 1L/min, and at the moment, the air pressure in the fuel tank cannot exceed 3KPa, so that fuel oil can enter the fuel tank during refueling.
In particular embodiments of the present disclosure, the structure of the housing of the hydrocarbon regulating device may be configured in any suitable manner. Alternatively, the oil gas adjusting device includes a main body 1 and a cover 2, a liquid collection chamber 10 is defined between the main body 1 and the cover 2, a valve body 3 is disposed in the liquid collection chamber 10, and a biasing member 4 is disposed between the cover 2 and the valve body 3, as shown with reference to fig. 1 to 3. Wherein the biasing member 4 may be used to attach the valve body 3 to the housing cover 2, the valve body 3 being movable in the liquid collection chamber 10 under the action of the biasing member 4.
On the basis of the technical scheme, the fuel evaporation system further comprises a fuel tank and a carbon canister, and the fuel evaporation system further comprises the oil-gas adjusting device for the fuel evaporation system in the technical scheme, wherein the fuel tank is communicated with the air inlet 11, and the carbon canister is communicated with the air supply port 12 and the breathing port 13.
Through above-mentioned technical scheme, the fuel evaporation system that this disclosure provided has the same technological effect with this oil gas adjusting device, avoids unnecessary repetition, does not describe here any more.
On the basis of the technical scheme, the disclosure also provides a vehicle which comprises the fuel evaporation system in the technical scheme.
Through the technical scheme, the vehicle provided by the disclosure has the same technical effect as the fuel evaporation system, and unnecessary repetition is avoided, so that the details are not repeated.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. An oil-gas adjusting device for a fuel evaporation system, which is characterized by comprising a shell and a valve body (3) arranged in the shell, wherein the shell is provided with an air inlet (11) for communicating the shell with a fuel tank, an air supply port (12) and a breathing port (13) for communicating with a carbon canister, the caliber of the air supply port (12) is larger than that of the breathing port (13), the valve body (3) has a first position and a second position, and in the first position, the valve body (3) blocks the air supply port (12) and avoids the breathing port (13) so that the breathing port (13) is communicated with the air inlet (11); in the second position, the valve body (3) is retracted from the air supply opening (12) such that the air supply opening (12) communicates with the air inlet opening (11); the valve body (3) is configured to: when the pressure in the housing increases to above a predetermined threshold value, the valve body (3) moves towards the second position to establish communication between the inlet port (11) and the delivery port (12), and when the pressure in the housing is not greater than the threshold value and the canister is not desorbed, the valve body (3) remains in the first position.
2. -air-conditioning device for fuel evaporation systems according to claim 1, characterized in that said valve body (3) also has a third position in which said valve body (3) blocks said air delivery opening (12) and said breathing opening (13), said valve body (3) being further configured to: when the canister desorbs to generate negative pressure, the valve body (3) moves towards the third position to cut off the communication between the breathing port (13) and the air inlet (11).
3. The vapor regulator for fuel vaporization system according to claim 2, characterized in that the valve body (3) is configured in a diaphragm shape, an edge of the valve body (3) is in abutment with an inner side wall of the housing, and has a first surface facing the air supply port (12) on which a first plunger portion (31) for blocking the air supply port (12) and a second plunger portion (32) for blocking the breather port (13) are formed.
4. -air-conditioning device for fuel evaporation systems according to claim 3, characterized in that the length of said first plunger portion (31) is greater than the length of said second plunger portion (32), so that when said valve body (3) is in said first position, said first plunger portion (31) blocks said air bleed (12) while said second plunger portion (32) avoids said breathing orifice (13).
5. The hydro-pneumatic regulator for fuel evaporation system according to claim 4, characterized in that the inner space of the housing is provided with a liquid collecting chamber (10) for collecting liquefied oil droplets, and the air inlet (11) is communicated with the liquid collecting chamber (10); the valve body (3) is matched with the shape of the liquid collecting cavity (10) and moves back and forth in the liquid collecting cavity (10) to reach the first position, the second position or the third position.
6. -air-conditioning device for fuel evaporation systems according to claim 5, characterized in that it further comprises an air intake nozzle (5) for connection with the fuel tank and an air delivery nozzle (6) for connection with the canister, said air intake (11) being provided in said casing, said air intake nozzle (5) being connected to said casing at said air intake (11); the air delivery nozzle (6) is connected to the housing and extends into the housing with a portion on which the air delivery opening (12) and the breathing opening (13) are both arranged.
7. The hydrocarbon regulating device for a fuel evaporation system according to any one of claims 1 to 6, characterized in that it further comprises a biasing member (4), said threshold value being defined by the biasing member (4).
8. The hydro-pneumatic regulator for fuel evaporation system according to claim 7, wherein the first surface except the first plunger portion (31) and the second plunger portion (32) faces the intake port (11), and the biasing member (4) is attached to a second surface of the valve body (3) opposite to the first surface and at a position corresponding to the first plunger portion (31) to provide the valve body (3) with a spring force facing the air supply port (12) and the breather port (13).
9. A fuel evaporation system comprising a fuel tank and a canister, characterized in that it further comprises an air-fuel regulating device for a fuel evaporation system as claimed in any one of claims 1 to 8, wherein said air intake (11) communicates with said fuel tank, said air delivery (12) and said breathing orifice (13) communicate with said canister.
10. A vehicle, characterized in that the vehicle is provided with a fuel evaporation system as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379174.8A CN111197542B (en) | 2018-11-19 | 2018-11-19 | Oil gas adjusting device of fuel evaporation system, fuel evaporation system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379174.8A CN111197542B (en) | 2018-11-19 | 2018-11-19 | Oil gas adjusting device of fuel evaporation system, fuel evaporation system and vehicle |
Publications (2)
| Publication Number | Publication Date |
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| CN111197542A true CN111197542A (en) | 2020-05-26 |
| CN111197542B CN111197542B (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811379174.8A Expired - Fee Related CN111197542B (en) | 2018-11-19 | 2018-11-19 | Oil gas adjusting device of fuel evaporation system, fuel evaporation system and vehicle |
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| JPH06272633A (en) * | 1993-03-16 | 1994-09-27 | Nissan Motor Co Ltd | Vaporized fuel leakage diagnostic device for internal combustion engine |
| CN2233014Y (en) * | 1995-12-01 | 1996-08-14 | 涿州石油物探绿菌实业有限公司 | Removal control valve |
| WO1996024792A1 (en) * | 1995-02-08 | 1996-08-15 | Stant Manufacturing Inc. | Tank venting system |
| JPH09287534A (en) * | 1996-04-25 | 1997-11-04 | Aisin Seiki Co Ltd | Fuel tank vent valve |
| US6786227B2 (en) * | 2000-08-17 | 2004-09-07 | Siemens Automotive Inc. | System and method including a fuel tank isolation valve |
| CN103672071A (en) * | 2013-12-20 | 2014-03-26 | 孙达立 | Low-pressure protective valve for fuel oil evaporation system of passenger car |
-
2018
- 2018-11-19 CN CN201811379174.8A patent/CN111197542B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06272633A (en) * | 1993-03-16 | 1994-09-27 | Nissan Motor Co Ltd | Vaporized fuel leakage diagnostic device for internal combustion engine |
| WO1996024792A1 (en) * | 1995-02-08 | 1996-08-15 | Stant Manufacturing Inc. | Tank venting system |
| CN2233014Y (en) * | 1995-12-01 | 1996-08-14 | 涿州石油物探绿菌实业有限公司 | Removal control valve |
| JPH09287534A (en) * | 1996-04-25 | 1997-11-04 | Aisin Seiki Co Ltd | Fuel tank vent valve |
| US6786227B2 (en) * | 2000-08-17 | 2004-09-07 | Siemens Automotive Inc. | System and method including a fuel tank isolation valve |
| CN103672071A (en) * | 2013-12-20 | 2014-03-26 | 孙达立 | Low-pressure protective valve for fuel oil evaporation system of passenger car |
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| CN111197542B (en) | 2021-05-14 |
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