CN211524970U - Double one-way valve for fuel evaporation system, fuel evaporation system and vehicle - Google Patents
Double one-way valve for fuel evaporation system, fuel evaporation system and vehicle Download PDFInfo
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- CN211524970U CN211524970U CN201921751225.5U CN201921751225U CN211524970U CN 211524970 U CN211524970 U CN 211524970U CN 201921751225 U CN201921751225 U CN 201921751225U CN 211524970 U CN211524970 U CN 211524970U
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- stopper
- exhaust passage
- fuel evaporation
- evaporation system
- check valve
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Abstract
The present disclosure relates to a double check valve for a fuel evaporation system, a fuel evaporation system and a vehicle, wherein the double check valve comprises an intake passage and a first exhaust passage and a second exhaust passage selectively communicated with the intake passage, respectively, the double check valve further comprising: a stopper portion including a first stopper protruding inward from an inner wall of the first exhaust passage, and a second stopper protruding inward from an inner wall of the second exhaust passage; a seal portion including a first seal capable of abutting on a side of the first stopper close to the port of the first exhaust passage, and a second seal capable of abutting on a side of the second stopper close to the port of the second exhaust passage; and the elastic piece is connected between the first sealing piece and the second sealing piece, the first sealing piece can be abutted against the first stop piece under the action of the elastic piece, and the second sealing piece can be abutted against the second stop piece under the action of the elastic piece. The double one-way valve is integrated, the number of parts is reduced, and the function of reverse stop is achieved.
Description
Technical Field
The disclosure relates to the technical field of vehicle manufacturing, in particular to a double check valve for a fuel evaporation system, the fuel evaporation system and a vehicle.
Background
With the vigorous development of the modern automobile industry, control of the problems of automobile exhaust emission, fuel evaporation leakage pollution and the like has become one of the key points in the automobile research and development process. The fuel evaporation control (EVAP) is a control technology which prevents fuel steam in a fuel pipe from leaking into the atmosphere to pollute the environment, collects the fuel steam and sends the fuel steam to an engine for combustion, and improves the fuel economy. In this technique, activated carbon in the canister adsorbs fuel vapors which are then desorbed from the canister into the engine for combustion. At present, the path for fuel vapor to be desorbed from the carbon canister mainly includes: negative pressure desorption, wherein fuel steam in the carbon tank enters an air inlet manifold through an electromagnetic valve and then is sent into an engine to participate in combustion; and positive pressure desorption, wherein fuel steam in the carbon tank enters the supercharger through the electromagnetic valve, further enters the air inlet manifold and is sent into the engine to participate in combustion. To realize desorption of two paths, two one-way valves are required to be arranged to complete desorption, the number of parts is large, the occupied space is large, arrangement is inconvenient, and a complex assembly process is required.
SUMMERY OF THE UTILITY MODEL
A first object of the present disclosure is to provide a double check valve for a fuel evaporation system, which is structurally compact, easy to arrange, and has high structural strength.
It is a second object of the present disclosure to provide a fuel vaporization system that uses the present disclosure to provide a double check valve for a fuel vaporization system.
It is a third object of the present disclosure to provide a vehicle that uses the fuel evaporation system provided by the present disclosure.
In order to achieve the above object, the present disclosure provides a double check valve for a fuel evaporation system, including an intake passage and first and second exhaust passages selectively communicating with the intake passage, respectively, the double check valve further including: a stopper portion including a first stopper protruding inward from an inner wall of the first exhaust passage, and a second stopper protruding inward from an inner wall of the second exhaust passage; a seal portion including a first seal capable of abutting on a side of the first stopper close to a port of the first exhaust passage, a second seal capable of abutting on a side of the second stopper close to a port of the second exhaust passage; and the elastic piece is connected between the first sealing piece and the second sealing piece, the first sealing piece can be abutted against the first stop piece under the action of the elastic piece, and the second sealing piece can be abutted against the second stop piece under the action of the elastic piece.
Optionally, the first stopper is configured as a first annular plate circumferentially arranged along an inner wall of the first exhaust passage and formed with a first through hole through which the elastic member passes, and the second stopper is configured as a second annular plate circumferentially arranged along an inner wall of the second exhaust passage and formed with a second through hole through which the elastic member passes.
Optionally, the first seal is configured as a first disc capable of occluding the first port and the second seal is configured as a second disc capable of occluding the second port.
Optionally, the first disc has an outer diameter smaller than an inner diameter of the first exhaust passage, and the second disc has an outer diameter smaller than an inner diameter of the second exhaust passage.
Optionally, the double check valve further comprises: a first stopper provided at a port of the first exhaust passage to restrict the first seal between the first stopper and the first stopper; and a second stopper provided at a port of the second exhaust passage to restrict the second seal between the second stopper and the second stopper.
Optionally, the first stop member and the first limit member are respectively welded to an inner wall of the first exhaust passage, and the second stop member and the second limit member are respectively welded to an inner wall of the second exhaust passage.
Optionally, the intake passage, the first exhaust passage, and the second exhaust passage are configured in a T shape, the first exhaust passage and the second exhaust passage extend in the same direction, and the elastic member includes a spring.
Optionally, the number of the springs is plural.
According to a second aspect of the present disclosure, there is also provided a fuel evaporation system, including the double check valve for a fuel evaporation system provided by the present disclosure, a supercharger communicating with the first exhaust passage, an intake manifold communicating with the second exhaust passage, and a canister solenoid valve communicating with the intake passage.
According to a third aspect of the present disclosure, there is also provided a vehicle including the fuel evaporation system provided by the present disclosure.
Through the technical scheme, when the double check valve is in a non-working state, the first sealing element and the second sealing element can respectively abut against the first stop element and the second stop element under the action of the elastic element, when the air pressure in the first exhaust channel or the second exhaust channel is lower than that in the air inlet channel, fuel steam can enter the air inlet channel, the sealing part in the lower air pressure in the first exhaust channel and the second exhaust channel is ejected by overcoming the elastic force of the elastic element, the elastic element is in a stretching state at the moment, the sealing part in the exhaust channel with the higher air pressure in the first exhaust channel and the second exhaust channel can always abut against the stop part under the stretching action of the elastic element, and therefore one end of the double check valve is communicated while the other end of the double check valve is stopped. The fuel steam in the air inlet channel enters the first exhaust channel or the second exhaust channel according to different air pressures in the first exhaust channel and the second exhaust channel, so that the utilization rate of the fuel steam is improved, and the fuel economy is improved. In addition, the double one-way valve is integrated, the number of parts is effectively reduced, and the function of reverse stopping can be achieved. The damping characteristic of the elastic piece is utilized to play a role in buffering the sealing part connected with the elastic piece, so that the sealing part is prevented from being abraded or failed due to impact, the service life of the sealing part is prolonged, and the reliability of the double-check valve is improved.
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 a schematic structural diagram of a double one-way valve for a fuel vaporization system provided in an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram illustrating a first exhaust passage of a double check valve according to an exemplary embodiment of the present disclosure in communication;
description of the reference numerals
1 first exhaust passage 2 second exhaust passage
3 air intake passage 41 first stopper
42 second stop 51 first seal
52 second seal 6 spring
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, the use of directional terms such as "inner" and "outer" in reference to the proper contours of the components is intended unless otherwise indicated. In addition, the terms "first", "second", and the like used in the embodiments of the present disclosure are for distinguishing one element from another, and have no order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
As shown in fig. 1 and 2, the present disclosure provides a double check valve for a fuel evaporation system, including an intake passage 3 and first and second exhaust passages 1 and 2 selectively communicating with the intake passage 3, respectively, the double check valve further including a stopper portion, a sealing portion, and an elastic member: the stopper portions include a first stopper 41 projecting inward from the inner wall of the first exhaust passage 1, and a second stopper 42 projecting inward from the inner wall of the second exhaust passage 2; the seal portion includes a first seal 51 capable of abutting on a port side of the first stopper 41 close to the first exhaust passage 1, a second seal 52 capable of abutting on a port side of the second stopper 42 close to the second exhaust passage 2; and the elastic member is connected between the first sealing member 51 and the second sealing member 52, the first sealing member 51 can be abutted against the first stopper 41 under the action of the elastic member, and the second sealing member 52 can be abutted against the second stopper 42 under the action of the elastic member. It should be noted that, in the embodiment of the present disclosure, when the elastic member is in the free state or the slightly stretched state, the first sealing member 51 just abuts on the first stopper 41 and the second sealing member 52 just abuts on the second stopper 42. The first sealing member 51 can be closely attached to the first stopper 41, and the second sealing member 52 can be closely attached to the second stopper 42, so that the first exhaust passage 1 or the second exhaust passage 2 can be closed.
Through the technical scheme, when the two-way check valve is in a non-working state, the first sealing element 51 and the second sealing element 52 respectively abut against the first stop element 41 and the second stop element 42 under the action of the elastic element, when the air pressure in the first exhaust channel 1 or the second exhaust channel 2 is lower than that in the air inlet channel 3, fuel steam can enter the air inlet channel 3 and push open the sealing part in the lower air pressure in the first exhaust channel 1 and the second exhaust channel 2 by overcoming the elastic force of the elastic element, at the moment, the elastic element is in a stretching state, and the sealing part in the exhaust channel with the higher air pressure in the first exhaust channel and the second exhaust channel always abuts against the stop part under the stretching action of the elastic element, so that one end of the two-way check valve is conducted, and the other end of the two-way check valve is stopped. The fuel steam in the air inlet channel 3 enters the first exhaust channel 1 or the second exhaust channel 2 according to different air pressures in the first exhaust channel 1 and the second exhaust channel 2, so that the utilization rate of the fuel steam is improved, and the fuel economy is improved. In addition, the double one-way valve is integrated, the number of parts is effectively reduced, and the function of reverse stopping can be achieved. The damping characteristic of the elastic piece is utilized to play a role in buffering the sealing part connected with the elastic piece, so that the sealing part is prevented from being abraded or failed due to impact, the service life of the sealing part is prolonged, and the reliability of the double-check valve is improved.
In the disclosed embodiment, as shown in fig. 1 and 2, the intake passage 3, the first exhaust passage 1, and the second exhaust passage 2 may be configured in a T-shape, the first exhaust passage 1 and the second exhaust passage 2 extend in the same direction, and the elastic member may include a spring 6. The present disclosure does not limit the specific configuration of the double check valve as long as the moving direction of the elastic member is ensured to be the extending direction of the air flow in the first exhaust passage 1 and the second exhaust passage 2. The spring 6 may be stretched in the extending direction of the first exhaust passage 1 and the second exhaust passage 2 by the pressure difference. Fig. 2 shows that when the air pressure of the first exhaust passage 1 is lower than the air pressure of the intake passage 3 and lower than the air pressure of the second exhaust passage 2, the first seal 51 is pushed away from the first stopper 41 by fuel vapor from the intake passage 3, the first exhaust passage 1 is conducted, and the second exhaust passage 2 is stopped against the second stopper 42 by the second seal 52, and the direction of the arrow in fig. 2 is the direction in which the fuel vapor flows. When the air pressure in the double one-way valve is changed to be that the air pressure of the second exhaust channel 2 is smaller than the air pressure of the first exhaust channel 1, the first exhaust channel 1 is closed, the second exhaust channel 2 is communicated, and the working principle is the same as that described above. The elastic member in the disclosed embodiment may further include a rubber gasket connected between the spring 6 and the sealing member to better protect the sealing member from shock. The elastic coefficient of the elastic piece can be designed according to the application environment, so that the elastic piece can smoothly drive the sealing piece to move under the action of pressure difference in the working process of the double-check valve.
According to the structure of the exhaust passage, in the embodiment of the present disclosure, the first stopper 41 may be configured as a first annular plate circumferentially provided along the inner wall of the first exhaust passage 1 and formed with a first through opening through which the elastic member passes, and the second stopper 42 may be configured as a second annular plate circumferentially provided along the inner wall of the second exhaust passage 2 and formed with a second through opening through which the elastic member passes. Thus, the flow of the fuel vapor can be circulated only through the first port or the second port. The annular baffle is arranged, so that the pressure of the air flow generated by the air flow is uniform, the air flow is prevented from being disordered in the double one-way valve, and the idling instability of the engine is avoided. In order to improve the motion stability of the elastic member and prevent the elastic member from moving in the circumferential direction, a guide element may be further disposed on the first stopper 41 and the second stopper 42, for example, a smooth guide pillar may be vertically disposed in the circumferential direction of the annular plate, and a hole for the guide pillar to pass through is formed in the sealing member, so that the first sealing member 51 and the second sealing member 52 can only move along the guide pillar. In another embodiment, when the elastic member is the spring 6, axially extending sockets capable of accommodating the spring 6 may be formed in the first and second ports, respectively, so that the spring 6 can move only along the inner wall of the socket. When the thicknesses of the first stopper 41 and the second stopper 42 are sufficiently thick, the inner walls of the first through opening and the second through opening may also be used as a sleeve for guiding.
In order to correspond to the configuration of the first and second ports, the first seal 51 may be configured as a first disk capable of blocking the first port, and the second seal 52 may be configured as a second disk capable of blocking the second port. The first wafer and the second wafer can be both diaphragms, the outer diameter of the first wafer is larger than the diameter of the first through hole, and the outer diameter of the second wafer is larger than the diameter of the second through hole. The sealing element is arranged in a wafer form, so that the sealing element is stressed uniformly, deflection is avoided, the stability of airflow in the double one-way valve is ensured, and unstable idling of an engine is avoided.
Specifically, the outer diameter of the first disk is smaller than the inner diameter of the first exhaust passage 1, and the outer diameter of the second disk is smaller than the inner diameter of the second exhaust passage 2. This ensures that the fuel vapor stream can smoothly flow through the gap between the first disc and the inner wall of the first exhaust duct 1 or through the gap between the second disc and the inner wall of the second exhaust duct 2. When the first wafer and the second wafer are the membranes, due to the elastic sensitive characteristic of the membranes, the membranes can generate strain movement at the edges when being pressed, so that the conduction of the one-way valve can be realized, and the outer diameters of the first wafer and the second wafer can not be limited.
In addition, in order to improve the reliability of the double-check valve disclosed by the present disclosure, the stroke of the elastic member may be further limited, and therefore, the double-check valve in the embodiment of the present disclosure may further include a first limiting member and a second limiting member; a first stopper is provided at a port of the first exhaust passage 1 to restrict the first seal member 51 between the first stopper and the first stopper 41; and a second stopper is provided at the port of the second exhaust passage 2 to restrict the second seal 52 between the second stopper and the second stopper 42. The stroke of the first seal 51 and the second seal 52 is controlled by the limitation of the first limiting member and the second limiting member, so that the flow rate of the fuel vapor in the check valve can also be controlled. The first limiting member and the second limiting member may be configured to be any structures extending inward from the inner walls of the first exhaust passage 1 and the second exhaust passage 2, as long as the sealing member is ensured to be tightly attached to the limiting members, and the circulation of the air flow is not affected. Wherein preferably set the locating part to the equipartition in the inner wall circumference of first exhaust passage 1 and second exhaust passage 2 to carry out the backstop from the circumference of sealing member, thereby guarantee that the atress of sealing member is even.
In the embodiment of the present disclosure, the first stopper 41 and the first stopper may be welded to the inner wall of the first exhaust passage 1, and the second stopper 42 and the second stopper may be welded to the inner wall of the second exhaust passage 2. The welding mode can be adopted to increase the structural strength of the interior of the double-check valve. In other embodiments, the stop and stop members may also be integrally formed with the exhaust passage.
In the embodiment of the present disclosure, the number of the springs 6 may be one or more, for example, three, and when the sealing member is the above-mentioned circular plate, the springs 6 may be uniformly distributed around the center of the circular plate in the circumferential direction of the circular plate. On the premise of meeting the requirement of spatial arrangement, different numbers of springs can be arranged according to the pressure difference and the stress requirement of the springs, and the method is not limited by the disclosure.
According to a second aspect of the present disclosure, there is also provided a fuel evaporation system including the above-described double check valve for a fuel evaporation system, a supercharger communicating with the first exhaust passage 1, an intake manifold communicating with the second exhaust passage 2, and a canister solenoid valve communicating with the intake passage 3. The desorption of fuel steam in the carbon tank is realized according to the pressure difference among the supercharger, the air inlet manifold and the carbon tank, so that the fuel steam enters the engine through different paths via the carbon tank electromagnetic valve to participate in the combustion of the engine, and the fuel economy is improved. The fuel evaporation system has all the advantages of the double one-way valve for the fuel evaporation system, and the detailed description is omitted.
According to a third aspect of the present disclosure, there is also provided a vehicle including the above fuel evaporation system, and having all the advantages of the above fuel evaporation system, which will not be described herein again to avoid repeated limitations.
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, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
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. A double check valve for a fuel evaporation system, comprising an intake passage (3) and a first exhaust passage (1) and a second exhaust passage (2) selectively communicating with the intake passage (3), respectively, characterized in that it further comprises:
a stopper portion including a first stopper (41) protruding inward from an inner wall of the first exhaust passage (1), and a second stopper (42) protruding inward from an inner wall of the second exhaust passage (2);
a seal portion including a first seal (51) capable of abutting on a port side of the first stopper (41) close to the first exhaust passage (1), a second seal (52) capable of abutting on a port side of the second stopper (42) close to the second exhaust passage (2); and
an elastic member connected between the first seal member (51) and the second seal member (52), the first seal member (51) being capable of abutting against the first stopper member (41) under the action of the elastic member and the second seal member (52) being capable of abutting against the second stopper member (42) under the action of the elastic member.
2. The double check valve for a fuel evaporation system according to claim 1, wherein the first stopper (41) is configured as a first annular plate circumferentially provided along an inner wall of the first exhaust passage (1) and formed with a first through-port through which the elastic member passes, and the second stopper (42) is configured as a second annular plate circumferentially provided along an inner wall of the second exhaust passage (2) and formed with a second through-port through which the elastic member passes.
3. The double check valve for a fuel evaporation system according to claim 2, wherein the first sealing member (51) is configured as a first disc capable of blocking the first port, and the second sealing member (52) is configured as a second disc capable of blocking the second port.
4. The double check valve for fuel evaporation systems according to claim 3, characterized in that the outer diameter of the first disc is smaller than the inner diameter of the first exhaust duct (1) and the outer diameter of the second disc is smaller than the inner diameter of the second exhaust duct (2).
5. The double check valve for a fuel evaporation system of claim 1, further comprising:
a first stopper provided at a port of the first exhaust passage (1) to restrict the first seal member (51) between the first stopper and the first stopper (41); and
a second stopper provided at a port of the second exhaust passage (2) to restrict the second seal (52) between the second stopper and the second stopper (42).
6. The double check valve for a fuel evaporation system according to claim 5, wherein the first stopper (41) and the first stopper are welded to an inner wall of the first exhaust passage (1), respectively, and the second stopper (42) and the second stopper are welded to an inner wall of the second exhaust passage (2), respectively.
7. The double check valve for a fuel evaporation system according to any one of claims 1 to 6, wherein the intake passage (3), the first exhaust passage (1), and the second exhaust passage (2) are configured in a T-shape, the first exhaust passage (1) and the second exhaust passage (2) extend in the same direction, and the elastic member includes a spring (6).
8. The double check valve for fuel evaporation system according to claim 7, characterized in that said spring (6) is in a plurality.
9. A fuel evaporation system, characterized by comprising a double check valve for a fuel evaporation system according to any one of claims 1 to 8, a supercharger communicating with the first exhaust passage (1), an intake manifold communicating with the second exhaust passage (2), and a canister solenoid valve communicating with the intake passage (3).
10. A vehicle, characterized in that the vehicle comprises a fuel evaporation system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921751225.5U CN211524970U (en) | 2019-10-17 | 2019-10-17 | Double one-way valve for fuel evaporation system, fuel evaporation system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921751225.5U CN211524970U (en) | 2019-10-17 | 2019-10-17 | Double one-way valve for fuel evaporation system, fuel evaporation system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN211524970U true CN211524970U (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921751225.5U Expired - Fee Related CN211524970U (en) | 2019-10-17 | 2019-10-17 | Double one-way valve for fuel evaporation system, fuel evaporation system and vehicle |
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| Country | Link |
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| CN (1) | CN211524970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306569A (en) * | 2022-07-28 | 2022-11-08 | 三一重型装备有限公司 | Gas reversing device and internal combustion engine |
-
2019
- 2019-10-17 CN CN201921751225.5U patent/CN211524970U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306569A (en) * | 2022-07-28 | 2022-11-08 | 三一重型装备有限公司 | Gas reversing device and internal combustion engine |
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Granted publication date: 20200918 Termination date: 20211017 |