CN218991746U - Mechanical valve, carbon tank desorption device, engine assembly and vehicle - Google Patents
Mechanical valve, carbon tank desorption device, engine assembly and vehicle Download PDFInfo
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- CN218991746U CN218991746U CN202223502190.6U CN202223502190U CN218991746U CN 218991746 U CN218991746 U CN 218991746U CN 202223502190 U CN202223502190 U CN 202223502190U CN 218991746 U CN218991746 U CN 218991746U
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The utility model provides a mechanical valve, a carbon tank desorption device, an engine assembly and a vehicle, wherein the mechanical valve comprises; a housing having a first space therein; the valve block is movably arranged in the first space and divides the first space into a first cavity and a second cavity, the air pressure in the first cavity applies a first acting force to the valve block, and the air pressure in the second cavity applies a second acting force in the opposite direction to the valve block; the connecting rod is positioned at one side of the valve plate close to the second cavity, the radial dimension of the connecting rod is smaller than that of the second cavity, and the first end of the connecting rod is connected with the valve plate; the valve body is connected with the second end of the connecting rod; the valve plate can drive the valve body to move through the connecting rod according to the difference between the first acting force and the second acting force so as to close or open the pipeline. The mechanical valve of the utility model can save cost.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to a mechanical valve, a carbon tank desorption device, an engine assembly and a vehicle.
Background
When the canister in the related art adsorbs vaporized fuel in the fuel tank, the engine sucks the adsorbed vaporized fuel, and an electronic shutoff valve and a pressure sensor for controlling communication between the fuel tank and the canister are provided in a path connecting the fuel tank and the canister, which results in a significant increase in cost.
Disclosure of Invention
The utility model aims to provide a novel technical scheme of a mechanical valve, which can solve the problem of obvious increase of cost caused by arrangement of an electronic stop valve and a pressure sensor in the prior art.
It is a further object of the present utility model to provide a carbon canister desorption apparatus comprising the mechanical valve described above.
It is a further object of the present utility model to provide an engine assembly including the above carbon canister desorption apparatus.
It is a further object of the present utility model to provide a vehicle including the engine assembly described above.
According to an object of the present utility model, there is provided a mechanical valve comprising; a housing having a first space therein; the valve block is movably arranged in the first space and divides the first space into a first cavity and a second cavity, the air pressure in the first cavity applies a first acting force to the valve block, and the air pressure in the second cavity applies a second acting force in the opposite direction to the valve block; the connecting rod is positioned at one side of the valve plate close to the second cavity, the radial dimension of the connecting rod is smaller than that of the second cavity, and the first end of the connecting rod is connected with the valve plate; the valve body is connected with the second end of the connecting rod; the valve plate can drive the valve body to move through the connecting rod according to the difference between the first acting force and the second acting force so as to close or open the pipeline.
Optionally, a second through hole is defined in the valve body, a first end of the second through hole is communicated with the second cavity, and a second end of the second through hole is communicated with the pipeline, so that when the valve body seals the pipeline, the second cavity is communicated with the pipeline.
Optionally, the mechanical valve further comprises: the base is fixedly arranged in the first cavity, a first through hole is formed in the base, and the first through hole is communicated with the first cavity; the elastic piece is arranged in the first cavity and is located between the base and the valve plate, the first end of the elastic piece is connected with the base, the second end of the elastic piece is connected with the valve plate, and the elastic piece is telescopic along the direction from the base to the valve plate.
Optionally, the valve plate is a solid sheet body and is attached to the inner wall surface of the housing, so that the first cavity and the second cavity are isolated from each other.
According to still another object of the present utility model, there is provided a canister desorption apparatus comprising: the device comprises an oil tank, a carbon tank and an engine; a first conduit having a first passage communicating the tank and the canister; a second conduit having a second passage that communicates the canister and the engine; the mechanical valve is any one of the mechanical valves, the first cavity is communicated with the second pipeline, the second cavity is communicated with the first pipeline, the valve body is movable at least between the second cavity and the first pipeline, and the valve body can open or seal the first pipeline according to the difference value.
Optionally, the carbon tank desorption device further comprises: the third pipeline is provided with a second space communicated with the first channel, the second space and the first space are positioned on two sides of the first channel and are coaxially arranged, and the valve body is movable between any two adjacent spaces of the first space, the first channel and the second space.
Optionally, the surface of the valve body connected with the connecting rod is a first surface, and when the valve body is located in the second space, a maximum distance between an inner wall, closest to the first surface, in the first pipeline and the first surface is not smaller than a preset distance.
Optionally, the radial dimension of the valve body is the same as the inner diameters of the housing and the third conduit, respectively.
According to a further object of the present utility model there is provided an engine assembly comprising a canister desorption apparatus as described in any one of the above.
According to a further object of the present utility model there is provided a vehicle comprising an engine assembly as defined in any one of the preceding claims.
According to the mechanical valve provided by the embodiment of the utility model, the valve plate is controlled by the pressure difference, and the valve body is driven to move by the valve plate, so that the pipeline can be opened or closed. Compared with the electric control valve in the prior art, the mechanical valve can reduce the cost. And when the mechanical valve is applied to the carbon tank desorption device, the valve body can be driven to move according to the pressure difference between the oil tank and the engine, so that the connection between the carbon tank and the oil tank is disconnected or restored.
Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
FIG. 1 is a schematic diagram of a canister desorption apparatus according to the present utility model;
FIG. 2 is a schematic view of a valve body of a carbon canister desorption apparatus according to the utility model in a second space;
FIG. 3 is a schematic structural view of a valve sheet of a carbon canister desorption apparatus according to the present utility model;
FIG. 4 is a schematic view of the structure of the base of the carbon canister desorption apparatus according to the utility model;
FIG. 5 is a schematic cross-sectional view of a valve body of a carbon canister desorption apparatus according to the utility model;
FIG. 6 is a schematic illustration of a valve body of a carbon canister desorption apparatus according to the present utility model plugging a first conduit;
FIG. 7 is a schematic view of the position of the valve body when the pressure in the tank of the carbon canister desorption device according to the present utility model increases;
fig. 8 is a schematic view of the relative positions of the first surface of the valve body and the inner wall of the first pipe of the carbon canister desorption apparatus according to the present utility model.
Reference numerals
A carbon canister desorption device 100;
an oil tank 10;
a first conduit 20; a first connection pipe 21; a second connection pipe 22; a first channel 23; an inner wall 24;
a mechanical valve 30; a valve body 31; a second through hole 311; a first surface 312; a connecting rod 32; a valve plate 33; an elastic member 34; a base 35; a first through hole 351; a first chamber 36; a second chamber 37; a housing 38;
a carbon tank 40;
a second conduit 50; a second channel 51;
a carbon canister solenoid valve 60;
ECU70；
an engine 80;
a third conduit 90; the second space 91.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
A mechanical valve 30 according to an embodiment of the present utility model is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the mechanical valve 30 according to the embodiment of the present utility model includes a housing 38, a valve plate 33, a connecting rod 32, and a valve body 31.
Specifically, the housing 38 has a first space therein, the valve plate 33 is movably mounted in the first space and divides the first space into a first cavity 36 and a second cavity 37, the air pressure in the first cavity 36 applies a first force to the valve plate 33, the air pressure in the second cavity 37 applies a second force in an opposite direction to the valve plate 33, the connecting rod 32 is located at one side of the valve plate 33 near the second cavity 37, the radial dimension of the connecting rod 32 is smaller than the radial dimension of the second cavity 37, the first end of the connecting rod 32 is connected with the valve plate 33, and the valve body 31 is connected with the second end of the connecting rod 32. Wherein, the valve plate 33 can drive the valve body 31 to move through the connecting rod 32 according to the difference between the first acting force and the second acting force so as to close or open the pipeline.
In other words, the mechanical valve 30 according to the embodiment of the present utility model is mainly composed of the housing 38, the valve plate 33, the connecting rod 32 and the valve body 31, a first space is formed in the housing 38, at least the valve plate 33 is installed in the first space, the valve plate 33 can divide the first space into a first chamber 36 and a second chamber 37, for example, the first space extends in the up-down direction, the valve plate 33 is disposed in the horizontal direction and installed in the first space, the first chamber 36 is located above the valve plate 33, and the second chamber 37 is located below the valve plate 33.
Since the air pressure in the first chamber 36 and the air pressure in the second chamber 37 can act on the valve plate 33 at the same time, the valve plate 33 can receive a first force exerted by the air pressure in the first chamber 36, a second force exerted by the air pressure in the second chamber 37, gravity of itself, and the like. Wherein, since the first chamber 36 and the second chamber 37 are located at both sides of the valve plate 33, the first acting force and the second acting force are opposite in direction. For example, the air pressure in the first chamber 36 applies a first downward force to the upper surface of the valve plate 33, and the air pressure in the second chamber 37 applies a second upward force to the lower surface of the valve plate 33, so that the valve plate 33 moves under the action of the combined force applied by itself.
In addition, the connecting rod 32 is installed at a side of the valve plate 33 away from the first cavity 36, that is, the first end of the connecting rod 32 is connected with the valve plate 33, and since the radial dimension of the connecting rod 32 is smaller than that of the second cavity 37, the air pressure in the second cavity 37 is prevented from interfering with the second acting force applied to the valve plate 33 due to the arrangement of the connecting rod 32.
It should be noted that, since the valve plate 33 is connected with the valve body 31 through the connecting rod 32, when the valve plate 33 moves under the action of the combined force applied by itself, the connecting rod 32 and the valve body 31 connected with the connecting rod 32 can be driven to move synchronously, so that the valve body 31 can be opened and closed for the pipeline.
When the mechanical valve of the present utility model is applied to the canister desorption apparatus 100, the first conduit 20 may be in communication with the tank 10 and the canister 40, respectively, through the first conduit 20, and the first conduit 20 may serve as an adsorption pipe. The second conduit 50 communicates with the engine 80 and the canister 40, respectively, and the second conduit 50 may act as a desorption tube. The first chamber 36 of the mechanical valve 30 of the present utility model communicates with the second conduit 50 and the second chamber 37 communicates with the first conduit 20. When the engine 80 desorbs the canister 40, a negative pressure P is generated in the desorption tube 1 . At this time, the pressure in the adsorption tube is equal to the pressure in the oil tank 10, and is P 2 The valve plate 33 moves into the first pipeline 20 under the action of the pressure difference and other combined forces, so that the communication between the oil tank 10 and the carbon tank 40 is blocked, and the phenomenon that the engine 80 is used for the fuel tank is avoidedWhen the canister 40 is desorbed, the oil and gas in the tank 10 enters the canister 40 or directly into the engine 80.
That is, when the mechanical valve of the present utility model is applied to the canister desorption apparatus 100, the mechanical valve 30 can disconnect the canister 40 from the fuel tank 10 when the canister 40 is desorbed, so as to prevent the fuel gas in the fuel tank 10 from entering the canister 40, improve the desorption efficiency of the canister 40, and avoid the problems of unstable combustion and flameout of the engine caused by over-concentration of the fuel gas. The position of the valve body 31 can also be controlled, so that when the pressure in the oil tank 10 is in a low-pressure zone, the connection between the oil tank 10 and the carbon tank 40 is isolated, the discharge amount of the oil tank 10 is reduced, and the system discharge is facilitated. By adopting the mechanical valve of the utility model, the production cost can be reduced compared with the electric control valve in the prior art.
Thus, according to the mechanical valve 30 of the embodiment of the present utility model, the valve plate 33 is controlled by using the pressure difference, and the valve body 31 is driven to move by the valve plate 33, so that the pipe can be opened or closed. The mechanical valve 30 of the present utility model can reduce costs relative to prior art electrically controlled valves. Also, when the mechanical valve 30 of the present utility model is applied to the canister desorption apparatus 100, the valve body 31 may be driven to move according to the pressure difference between the tank 10 and the engine 80, thereby accomplishing disconnection or restoration of the connection between the canister 40 and the tank 10.
According to one embodiment of the present utility model, as shown in fig. 5, a second through hole 311 is defined in the valve body 31, a first end of the second through hole 311 communicates with the second chamber 37, and a second end of the second through hole 311 communicates with the pipe such that the second chamber 37 communicates with the pipe when the valve body 31 closes the pipe. That is, communication between the pipe and the second chamber 37 can be achieved through the second through hole 311 formed in the valve body 31, and thus the pressure in the pipe and the pressure in the second chamber 37 can be equalized.
When the mechanical valve 30 of the present embodiment is applied to the canister desorption apparatus 100, the valve body 31 may open or close the first pipe 20, and when the valve body 31 closes the first pipe 20, the first pipe 20 may be divided into the first connection pipe 21 and the second connection pipe 22, the first end of the first connection pipe 21 communicates with the canister 40, the second end of the first connection pipe 21 is closed by the valve body 31, the first end of the second connection pipe 22 is closed by the valve body 31, and the second end of the second connection pipe 22 communicates with the fuel tank 10. Wherein the passage 3.7 enables the second chamber 37 to be in communication with the second connecting tube 22 when the valve body 31 is blocking the first conduit 20, maintaining the pressure in the second chamber 37 equal to the pressure in the tank 10.
According to one embodiment of the present utility model, as shown in fig. 2, the mechanical valve 30 further includes a base 35 and an elastic member 34, the base 35 is fixedly mounted in the first cavity 36, the base 35 is provided with a first through hole 351 therethrough, the first through hole 351 is in communication with the first cavity 36, the elastic member 34 is mounted in the first cavity 36 and located between the base 35 and the valve plate 33, a first end of the elastic member 34 is connected to the base 35, a second end of the elastic member 34 is connected to the valve plate 33, and the elastic member 34 is retractable in a direction from the base 35 to the valve plate 33.
That is, the base 35 and the elastic member 34 are further accommodated in the first space, the base 35 may be fixedly installed on an inner wall surface of the housing 38, the elastic member 34 is installed between the base 35 and the valve plate 33, and the elastic member 34 may be a spring. Since the base 35 is provided with the first through hole 351, the air pressure in the first chamber 36 passes through the first through hole 351, passes through the elastic member 34, and reaches the valve plate 33, and applies a first force to the valve plate 33. For example, the base 35, the elastic member 34 and the valve plate 33 are distributed along the direction from top to bottom, the base 35 is provided with a first through hole 351 penetrating in the vertical direction, and the air pressure above the base 35 passes through the first through hole 351 downwards, and finally applies a first downward force to the upper surface of the valve plate 33.
Further, by providing the stretchable elastic member 34, the control valve plate 33 can have an initial position, that is, the control valve body 31 can have an initial position. For example, the control valve body 31 closes or opens the pipe in the initial state. In addition, by arranging the telescopic elastic piece 34, the acting force of the elastic piece 34 needs to be overcome when the valve plate 33 moves, so that the movement process of the valve plate 33 is more stable and repeatable.
For example, in the case where the mechanical valve 30 of the present embodiment is applied to the canister desorption apparatus 100, when the negative pressure in the desorption tube is small, the valve plate 33 can be maintained at the initial position by the elastic member 34 and the connecting rod 32 and the valve body 31, and at this time, since the negative pressure in the desorption tube is small and there is a certain pressure drop between the desorption port and the adsorption port of the canister 40, even if the connection between the adsorption tube and the fuel tank 10 is not broken, the negative pressure in the desorption tube cannot be significantly applied to the fuel tank 10.
In addition, when the engine 80 does not desorb the canister 40, the valve plate 33, the connecting rod 32, and the valve body 31 may be in the initial position by the elastic member 34. At this time, the elastic member 34 is in a compressed or free state, and the position of the valve body 31 does not affect the connection between the suction pipe and the fuel tank 10.
That is, by adopting the cooperation of the base 35, the elastic member 34 and the valve plate 33, the movement stroke of the valve plate 33 can be controlled, thereby better controlling the position of the valve body 31.
In some embodiments of the present utility model, as shown in fig. 3, the valve plate 33 is a solid sheet and is attached to an inner wall surface of the housing 38, so that the first cavity 36 and the second cavity 37 are isolated from each other, that is, the valve plate 33 is a solid piece, when the valve plate 33 slides along the inner wall of the housing 38, the first cavity 36 and the second cavity 37 are not communicated with each other, so that interference between gas in the first cavity 36 and gas in the second cavity 37 can be effectively avoided, and in addition, the acquisition of the first acting force and the second acting force on the valve plate 33 is facilitated.
As shown in fig. 1 to 8, the present utility model also provides a canister desorption apparatus 100, the canister desorption apparatus 100 including a fuel tank 10, a canister 40, an engine 80, a first pipe 20, a second pipe 50, and a mechanical valve 30.
Specifically, the first pipe 20 has a first passage 23, the first passage 23 communicates with the tank 10 and the canister 40, the second pipe 50 has a second passage 51, the second passage 51 communicates with the canister 40 and the engine 80, the mechanical valve 30 is the mechanical valve 30 of any of the above embodiments, the first chamber 36 communicates with the second pipe 50, the second chamber 37 communicates with the first pipe 20, the valve body 31 is movable at least between the second chamber 37 and the first pipe 20, and the valve body 31 is capable of opening or closing the first pipe 20 according to a difference.
That is, the mechanical valve 30 in the present utility model may be used for the canister desorption apparatus 100, and specifically, the canister desorption apparatus 100 is mainly composed of the oil tank 10, the canister 40, the engine 80, the first pipe 20, the second pipe 50, and the mechanical valve 30, wherein the mechanical valve 30 is the mechanical valve 30 of any one of the above embodiments. The first pipe 20 communicates with the tank 10 and the canister 40, respectively, and the first pipe 20 may serve as an adsorption pipe. The second conduit 50 communicates with the engine 80 and the canister 40, respectively, and the second conduit 50 may act as a desorption tube. That is, the mechanical valve 30 of the embodiment of the present utility model may drive the valve body 31 to move by the pressure difference between the desorption pipe and the adsorption pipe, etc., thereby achieving disconnection or restoration of the adsorption pipe from the oil tank 10. When the mechanical valve 30 further includes the base 35 and the elastic member 34, the mechanical valve 30 may drive the valve body 31 to move through the pressure difference between the desorption tube and the adsorption tube and the elastic member 34.
Specifically, the first conduit 20 defines a first passage 23 therein and the second conduit 50 defines a second passage 51 therein, the first chamber 36 being in communication with the second conduit 50 and the second chamber 37 being in communication with the first conduit 20. For example, the tank 10 communicates with a first end of the first conduit 20, the canister 40 communicates with a second end of the first conduit 20, and the second chamber 37 of the mechanical valve 30 communicates with a third end of the first conduit 20, wherein the third end of the first conduit 20 is located between the first end of the first conduit 20 and the second end of the first conduit 20. At the same time, the carbon canister 40 is in communication with a first end of the second conduit 50, the engine 80 is in communication with a second end of the second conduit 50, the first chamber 36 of the mechanical valve 30 is in communication with a third end of the second conduit 50, and the third end of the second conduit 50 is located between the first end of the second conduit 50 and the second end of the second conduit 50.
In operation, the valve body 31 can be driven by the valve plate 33 to close or open the first conduit 20. And, the movement of the valve plate 33 can be controlled by the pressure difference between the first chamber 36 and the second chamber 37, and since the first pipe 20 is communicated with the second chamber 37 and the second pipe 50 is communicated with the first chamber 36, the movement of the valve plate 33, and thus the movement of the valve body 31, can be controlled according to the air pressures in the first pipe 20 and the second pipe 50.
Thus, the canister desorption apparatus 100 according to the present utility model can be shut off by the mechanical valve 30And (5) opening and recovering the communication state of the adsorption tube. Wherein the tank 10 and the canister 40 are connected together by a first conduit 20, and the canister 40 and the engine 80 are connected together by a second conduit 50. When the engine 80 is used for desorbing the carbon tank 40, the negative pressure P is generated in the second pipeline 50, namely the desorption pipe 1 At this time, the pressure in the first pipeline 20, i.e. the adsorption pipe, can be equal to the pressure in the oil tank 10, and is P 2 . By P acting simultaneously on the valve plate 33 1 、P 2 And the resultant force of the like controls the movement of the valve plate 33, and thus the valve body 31, to close the first pipe 20 at the time of desorption, i.e., to disconnect the communication relationship between the tank 10 and the canister 40.
Alternatively, the canister desorption apparatus 100 according to the embodiment of the utility model further includes a canister electronic valve 60 and an ECU70, the canister electronic valve 60 may be connected to the engine 80 through a pipe, and the canister 40 and the canister electronic valve 60 may be connected together through a second pipe 50. Also, the canister electronic valve 60 may operate under the control of the ECU 70.
According to an embodiment of the present utility model, as shown in fig. 2 and 7 to 8, the carbon canister desorption apparatus 100 further includes a third pipe 90, the third pipe 90 having a second space 91 communicating with the first passage 23, the second space 91 being located on both sides of the first passage 23 and coaxially disposed with the first space, and the valve body 31 being movable between any adjacent two of the first space, the first passage 23 and the second space 91.
For example, the housing 38 of the mechanical valve 30 is located above the first conduit 20 and below the second conduit 50, the first chamber 36 is located above the valve plate 33 and in communication with the second conduit 50, and the second chamber 37 is located below the valve plate 33 and in communication with the first conduit 20.
Further, the third conduit 90 may be located below the first conduit 20, with the second space 91 defined within the third conduit 90 and the first space defined within the mechanical valve 30, the first space being located above the first passage 23 and in communication with the first passage 23, and the second space 91 being located below the first passage 23 and in communication with the first passage 23. Further, since the first space is provided coaxially with the second space 91, the valve body 31 can enter the first passage 23 from the second space 91, enter the first space from the first passage 23, or enter the second space 91 from the first passage 23, enter the first passage 23 from the first space, and the like.
In the present embodiment, by adopting the third pipe 90, the initial position of the valve body 31 can be selected, and thus the application to a plurality of working conditions can be realized.
According to an embodiment of the present utility model, as shown in fig. 8, the surface of the valve body 31 to which the second end of the connecting rod 32 is connected is a first surface 312, and when the valve body 31 is located in the second space 91, the maximum distance between the inner wall 24 closest to the first surface 312 and the first surface 312 in the first pipe 20 is not less than a preset distance. When the vehicle is refueled, the pressure of the fuel tank 1 is typically only a few kilopascals during refueled, and the engine 8 is in a flameout state, and the pressure in the desorption tube is atmospheric pressure, so that the pressure difference across the valve plate 33 is only a few kilopascals. In the present embodiment, by limiting the travel required for the valve body 31 to move from the second space 91 to the first conduit 20, the maximum pressure P that may occur in the suction tube during refueling is made max The maximum displacement of the valve body 31 does not exceed the preset distance, so that the first pipe 20 is not blocked during refueling.
In some embodiments of the present utility model, the radial dimension of the valve body 31 is the same as the inner diameters of the housing 38 and the third pipe 90, respectively, that is, the outer circumferential surface of the valve body 31 can be fitted to the inner wall surface of the third pipe 90 when the valve body 31 moves within the third pipe 90. When the valve body 31 moves in the housing 38, the valve body 31 can be bonded to the inner wall surface of the housing 38. In the present embodiment, by defining the same inner diameter of the housing 38 and the third pipe 90, not only is processing facilitated, but also the movement of the valve body 31 is facilitated to be smooth and stable.
A plurality of operating conditions of the carbon canister desorption apparatus 100 according to the present utility model will be described with reference to specific embodiments.
Working condition I
When the engine 80 desorbs the canister 40, a negative pressure P is generated in the desorption tube 1 . At this time, the pressure in the adsorption tube is equal to the pressure in the oil tank 10, and is P 2 . As shown in fig. 4, the base 35 is hollowed outI.e. with a first through hole 351, the pressure in the desorption tube can act on the valve plate 33 through the hollow structure. The surface area S of the valve plate 33 is set, the elastic member 34 is in a stretched state, the elastic coefficient is set to k, the deformation is set to L, the gravity of the valve body 31 is set to G, and then the stress of the valve plate 33 is set to F, wherein the direction of the force is positive upwards and negative downwards, and the up-down direction is referred to the view of fig. 5.
F＝(P 1 -P 2 )·S+k·L-G；
As shown in FIG. 6, when F 0 When the pressure difference between the two ends is more than 0, the valve plate 33 overcomes the acting force of the elastic piece 34 and moves upwards with the connecting rod 32 and the valve body 31. Deformation L of elastic member 34 0 Gradually decrease L 1 At this time F 1 When=0, the valve plate 33, the connecting rod 32, and the valve body 31 stop moving. As shown in fig. 6, when the movement (L 0 -L 1 ) After the distance between the adsorption tube and the fuel tank 10, the position of the valve body 31 is in the connecting channel between the adsorption tube and the fuel tank 10, and at this time, the connection between the adsorption tube and the fuel tank 10 is blocked by the valve body 31, so that the problem that when the engine 80 desorbs the carbon tank 40, the oil gas in the fuel tank enters the carbon tank 40 or directly enters the engine 80, so that the desorption efficiency is reduced or the over-rich oil gas in the fuel tank 10 directly enters the engine 80 to influence the air-fuel ratio of the engine 80 and interfere the combustion stability is avoided.
Working condition II
As shown in FIG. 2, when F 0 When < 0, the valve plate 33 is maintained at the initial position by the elastic member 34 and the connecting rod 32 and the valve body 31. At this time, because the negative pressure in the desorption tube is smaller, and a certain pressure drop exists between the desorption port and the adsorption port of the carbon tank 40, even if the connection between the adsorption tube and the oil tank 10 is not broken under this condition, the negative pressure in the desorption tube cannot obviously act on the oil tank 10, so that the over-rich oil gas in the oil tank 10 is prevented from directly entering the engine 80 to affect the air-fuel ratio of the engine 80 and interfere with the combustion stability.
Working condition three
As shown in fig. 2, when the engine 80 does not desorb the canister 40, the valve plate 33, the connecting rod 32, and the valve body 31 are in the initial positions by the elastic member 34. At this time, the elastic member 34 is in a compressed or free state, and the position of the valve body 31 does not affect the connection between the suction pipe and the fuel tank 10. Under the barrier of the valve plate 33, the oil gas in the oil tank 10 will not enter the desorption pipe through the channel.
Working condition four
When the engine 80 is not desorbing the canister 40, the valve plate 33 moves upward against the elastic member 34 under the action of the tank end pressure due to the excessive pressure in the tank 10. When the state shown in fig. 6 is reached, a second chamber 37 is formed between the valve body 31 and the valve plate 33. As shown in fig. 5, the valve body 31 has a passage 3.7 therein, and when the valve body 31 is in the position shown in fig. 6, the passage 3.7 keeps the second chamber 37 in communication with the second connection pipe 22, maintaining the pressure in the second chamber 37 equal to the pressure in the tank 10. At this time, if the pressure in the tank 10 does not rise further, the valve body 31 maintains the state shown in fig. 6, which isolates the connection between the tank 10 and the canister 40, reduces the oil gas discharged from the tank 10 into the canister 40, and is beneficial to discharge. As shown in fig. 7, when the pressure in the tank 10 further increases, the valve body 31 continues to move upward. At this time, the tank 10 is restored to the connection with the canister 40, and the pressure in the tank 10 is released.
Working condition five
When the vehicle is refueled, the tank pressure is typically only a few kilopascals during refueled, while the engine is in a flameout state and the pressure in the desorption tube is atmospheric, so the pressure difference across the valve plate 33 is only a few kilopascals. As shown in FIG. 8, the valve body 31 is spaced from the inner wall of the adsorption tube by a distance of Xmm, and the maximum pressure P which may occur in the adsorption tube during the refueling process is set max . The setting of X is satisfied at the pressure P max Under the action of (a), the maximum displacement of the valve body 31 is not greater than X, i.e., F is 0 when the elastic member 34 is displaced by X.
F＝(P max -P 1 )·S+k·(L 0 -X)-G＝0。
In summary, the carbon canister desorption apparatus 100 of the present utility model realizes the replacement of the solenoid valve in the existing scheme with the mechanical valve 30, and satisfies the control of the connection state of the carbon canister 40 and the oil 10 during the desorption of the carbon canister 40 at a lower cost. Specifically, the carbon tank desorption device 100 realizes that when the carbon tank 40 is desorbed, the carbon tank 40 is disconnected from the oil tank 10 by limiting the specific structure of the mechanical valve 30, so that internal oil gas in the oil tank 10 is prevented from entering the carbon tank 40, the desorption efficiency of the carbon tank 40 is improved, and the problems of unstable combustion and flameout of the engine 80 caused by over-concentration of the oil gas are avoided. And when the pressure in the oil tank 10 is in a low-pressure region, the oil tank 10 is isolated from being connected with the carbon tank 40, so that the discharge amount of the oil tank 10 is reduced, and the system discharge is facilitated.
The utility model also provides an engine assembly, which comprises the carbon tank desorption device 100 of any embodiment, wherein the carbon tank desorption device 100 has the advantages of preventing the internal oil gas of the oil tank 10 from entering the carbon tank, improving the desorption efficiency of the carbon tank 40, and the like, so the engine assembly of the embodiment of the utility model also has the advantages, and is not described herein.
The utility model also provides a vehicle, which comprises the engine assembly of any embodiment, and the engine assembly has the advantage of reducing cost, so the vehicle of the embodiment of the utility model also has the advantage, and the description is omitted herein.
While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (10)
1. A mechanical valve, comprising;
a housing having a first space therein;
the valve block is movably arranged in the first space and divides the first space into a first cavity and a second cavity, the air pressure in the first cavity applies a first acting force to the valve block, and the air pressure in the second cavity applies a second acting force in the opposite direction to the valve block;
the connecting rod is positioned at one side of the valve plate close to the second cavity, the radial dimension of the connecting rod is smaller than that of the second cavity, and the first end of the connecting rod is connected with the valve plate;
the valve body is connected with the second end of the connecting rod;
the valve plate can drive the valve body to move through the connecting rod according to the difference between the first acting force and the second acting force so as to close or open the pipeline.
2. The mechanical valve of claim 1, wherein the valve body defines a second through bore therein, a first end of the second through bore being in communication with the second chamber, a second end of the second through bore being in communication with the conduit such that the second chamber is in communication with the conduit when the valve body closes the conduit.
3. The mechanical valve of claim 1, further comprising:
the base is fixedly arranged in the first cavity, a first through hole is formed in the base, and the first through hole is communicated with the first cavity;
the elastic piece is arranged in the first cavity and is located between the base and the valve plate, the first end of the elastic piece is connected with the base, the second end of the elastic piece is connected with the valve plate, and the elastic piece is telescopic along the direction from the base to the valve plate.
4. The mechanical valve of claim 1, wherein the valve plate is a solid sheet and is in contact with an inner wall surface of the housing to isolate the first and second chambers from each other.
5. A canister desorption apparatus, comprising:
the device comprises an oil tank, a carbon tank and an engine;
a first conduit having a first passage communicating the tank and the canister;
a second conduit having a second passage that communicates the canister and the engine;
a mechanical valve according to any one of claims 1 to 4, said first chamber being in communication with said second conduit, said second chamber being in communication with said first conduit, said valve body being movable at least between said second chamber and said first conduit, said valve body being capable of opening or blocking said first conduit depending on said difference.
6. The canister desorption apparatus according to claim 5, further comprising:
the third pipeline is provided with a second space communicated with the first channel, the second space and the first space are positioned on two sides of the first channel and are coaxially arranged, and the valve body is movable between any two adjacent spaces of the first space, the first channel and the second space.
7. The carbon canister desorption apparatus as defined in claim 6, wherein the surface of the valve body to which the connecting rod is connected is a first surface, and a maximum distance between an inner wall closest to the first surface in the first pipe and the first surface is not less than a preset distance when the valve body is located in the second space.
8. The canister desorption apparatus according to claim 6, wherein the radial dimension of the valve body is the same as the inner diameters of the housing and the third pipe, respectively.
9. An engine assembly comprising a canister desorption apparatus according to any one of claims 5 to 8.
10. A vehicle comprising the engine assembly of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223502190.6U CN218991746U (en) | 2022-12-26 | 2022-12-26 | Mechanical valve, carbon tank desorption device, engine assembly and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223502190.6U CN218991746U (en) | 2022-12-26 | 2022-12-26 | Mechanical valve, carbon tank desorption device, engine assembly and vehicle |
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| CN218991746U true CN218991746U (en) | 2023-05-09 |
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| CN202223502190.6U Active CN218991746U (en) | 2022-12-26 | 2022-12-26 | Mechanical valve, carbon tank desorption device, engine assembly and vehicle |
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| Country | Link |
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