CN112360651A - Electric control valve, fuel system, fuel filling and leakage detection and carbon tank desorption method - Google Patents

Electric control valve, fuel system, fuel filling and leakage detection and carbon tank desorption method Download PDF

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Publication number
CN112360651A
CN112360651A CN202011142610.7A CN202011142610A CN112360651A CN 112360651 A CN112360651 A CN 112360651A CN 202011142610 A CN202011142610 A CN 202011142610A CN 112360651 A CN112360651 A CN 112360651A
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CN
China
Prior art keywords
pushing mechanism
interface
cam
tank
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011142610.7A
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Chinese (zh)
Inventor
姜林
高德俊
吕昊
张艳波
周传军
严济彦
***
李建东
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Yapp Automotive Parts Co Ltd
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Yapp Automotive Parts Co Ltd
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Application filed by Yapp Automotive Parts Co Ltd filed Critical Yapp Automotive Parts Co Ltd
Priority to CN202011142610.7A priority Critical patent/CN112360651A/en
Publication of CN112360651A publication Critical patent/CN112360651A/en
Withdrawn legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08Engine-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
    • F02M25/0836Arrangement 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08Engine-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
    • F02M25/0809Judging failure of purge control system
    • F02M25/0827Judging failure of purge control system by monitoring engine running conditions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08Engine-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
    • F02M2025/0845Electromagnetic valves

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

The application discloses an electric control valve, a fuel system, fuel filling and leakage detection and a carbon tank desorption method, wherein the electric control valve comprises a body, a cam, a first pushing mechanism and a second pushing mechanism; a first interface and a second interface are respectively arranged on two opposite sides of the body; the cam is rotationally arranged in the body; one end of the first pushing mechanism is abutted against the cam, and the other end of the first pushing mechanism is used for closing or opening the first interface; one end of the second pushing mechanism is abutted to the cam, and the other end of the second pushing mechanism is used for closing or opening the second interface. The electric control valve provided by the invention can participate in and realize multiple functions of fuel oil filling control, fuel oil system leakage auxiliary detection and carbon tank and storage tank desorption purification, and replaces the application of an oil tank isolation valve, a mechanical valve and a carbon tank electromagnetic valve in the prior art, so that the fuel oil system has higher integration level, and the development cost is greatly reduced.

Description

Electric control valve, fuel system, fuel filling and leakage detection and carbon tank desorption method
Technical Field
The application relates to the technical field of fuel systems, in particular to an electric control valve, a fuel system, a fuel filling and leakage detection method and a carbon tank desorption method.
Background
In order to meet increasingly strict laws and regulations, oil and gas are required to be sealed in a fuel system under certain conditions, a fuel tank isolation valve is adopted for control, the pressure inside a fuel storage tank can be changed interactively due to the interactive change of the ambient temperature, if the pressure exceeds a certain range, the fuel storage tank can be deformed too much, therefore, the fuel tank isolation valve has a pressure protection function, namely, the fuel tank isolation valve can be opened when exceeding a certain positive pressure or being lower than a certain negative pressure, and the fuel tank isolation valve does not have an opening control function.
In addition, the volume control of the existing fuel system is realized by cutting off the oil vapor passage through a mechanical valve, but the accuracy of the volume is affected by the interference of factors such as air flow fluctuation, and a great deal of time and cost are consumed for modifying a storage tank or a valve in the later period.
In addition, strict emission regulations require that a vehicle is provided with an on-board diagnostic system (OBD), the detection of the fuel system is to judge whether the system leaks or not by forming positive pressure or negative pressure, the OBD module of the current fuel system is generally arranged on a path communicated with the atmosphere on a carbon tank, and a carbon tank electromagnetic valve is arranged on a channel between the carbon tank and the atmosphere and used for blocking the channel between the carbon tank and the atmosphere so as to achieve the purpose of sealing the fuel system.
However, the oil tank isolation valve, the mechanical valve and the carbon tank electromagnetic valve need to be developed separately, so that the period is long, the cost is high, and the change in the development process is difficult.
Disclosure of Invention
The invention aims to provide an electric control valve, a fuel system, a fuel filling and leakage detection and carbon tank desorption method, which are used for replacing the existing oil tank isolation valve, a mechanical valve and a carbon tank electromagnetic valve, realizing the accurate control of the fuel filling volume through the electric control valve and facilitating the detection and control of the leakage of the fuel system.
The invention provides an electric control valve, which comprises:
the connector comprises a body, wherein a first interface and a second interface are respectively arranged on two opposite sides of the body;
a cam rotatably disposed in the body;
one end of the first pushing mechanism is abutted to the cam, and the other end of the first pushing mechanism is used for closing or opening the first interface;
and one end of the second pushing mechanism is abutted to the cam, and the other end of the second pushing mechanism is used for closing or opening the second interface.
The electronic control valve as described above, wherein preferably, the first pushing mechanism includes a first push rod, a first sealing member and a first push plate, two ends of the first push rod are respectively and fixedly connected with the first push plate and the first sealing member, the first push plate abuts against the cam, and the first sealing member is used for closing or opening the first port;
the second pushing mechanism comprises a second pushing rod, a second sealing piece and a second pushing plate, two ends of the second pushing rod are fixedly connected with the second pushing plate and the second sealing piece respectively, the second pushing plate is abutted to the cam, and the second sealing piece is used for closing or opening the second interface.
The electrically controlled valve as described above, wherein preferably, a first air passage and a second air passage are provided on the body, the first air passage is communicated with the first interface, and the second air passage is communicated with the second interface.
The invention also provides a fuel system, wherein the fuel system comprises the electric control valve provided by the invention, and the fuel system further comprises:
a tank in communication with the first port;
the carbon tank is connected with the engine, an air inlet of the carbon tank is communicated with a first air passage on the electric control valve, and an air outlet of the carbon tank is communicated with a second air passage of the electric control valve;
the liquid level detection mechanism is arranged on the storage tank;
the pressure detection mechanism is arranged on the storage tank;
and the controller is respectively connected with the liquid level detection mechanism and the pressure detection mechanism.
The fuel system as described above, preferably further comprising a canister purge valve disposed between the canister and the engine, the canister purge valve being connected to the controller.
The fuel system as described above, preferably, further includes a tank pipeline, an air outlet is disposed above the tank, and two ends of the tank pipeline are respectively communicated with the air outlet and the first interface.
The invention also provides a fuel filling control method, wherein the fuel system provided by the invention is adopted, and the method comprises the following steps:
acquiring a filling signal;
controlling a cam in the electric control valve to rotate so that the parts, positioned on two sides of the protruding part, of the cam are respectively contacted with the first pushing mechanism and the second pushing mechanism;
judging whether the filling liquid level reaches a preset liquid level or not;
if yes, stopping filling, controlling the cam to rotate to a position where the protruding part is aligned with the first pushing mechanism so as to close the first interface through the first pushing mechanism, and opening the second interface through the second pushing mechanism;
acquiring a supplementary injection signal;
controlling the cam to rotate to enable the protruding part to deviate from the angle set by the first pushing mechanism;
refilling the storage tank;
and controlling the cam to rotate to the position where the convex part is aligned with the first pushing mechanism again so as to close the first interface through the first pushing mechanism and open the second interface through the second pushing mechanism.
The invention also provides a fuel leakage detection method, wherein the fuel system provided by the invention is adopted, and the method comprises the following steps:
acquiring a detection signal of a vehicle-mounted diagnosis system;
controlling the cam to rotate to enable the protruding part to rotate to a position aligned with the second pushing mechanism so as to close the second interface through the second pushing mechanism and open the first interface through the first pushing mechanism;
after detection is finished, the cam is controlled to rotate to a position where the protruding portion is aligned with the first pushing mechanism, so that the first interface is closed through the first pushing mechanism, and the second interface is opened through the second pushing mechanism.
The invention also provides a carbon tank desorption method, wherein the fuel oil system provided by the invention is adopted, and the method comprises the following steps:
acquiring a carbon tank desorption signal;
opening a carbon tank purification valve;
controlling the cam to rotate to enable the protruding part to rotate to any position of an area between a position aligned with the first pushing mechanism and a position perpendicular to the movement direction of the first pushing mechanism;
after the desorption is finished, closing the carbon tank purification valve, controlling the cam to rotate to or keep at the position where the protruding part is aligned with the first pushing mechanism, so that the first interface is closed through the first pushing mechanism, and the second interface is opened through the second pushing mechanism.
The electric control valve, the fuel system, the fuel filling and leakage detection method and the carbon tank desorption method provided by the invention can enable the electric control valve to participate in and realize multiple functions of fuel filling control, fuel system leakage auxiliary detection and carbon tank and storage tank desorption purification, and replace the application of an oil tank isolation valve, a mechanical valve and a carbon tank electromagnetic valve in the prior art, so that the fuel system has higher integration level, and the development cost is greatly reduced.
Drawings
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a fuel system provided by an embodiment of the invention;
FIG. 2 is a state diagram of the first port being closed and the second port being not closed;
FIG. 3 is a state diagram of the first interface when not fully open;
fig. 4 is a state diagram in which the second port is closed and the first port is not closed.
Description of reference numerals:
1-body
11-first interface
12-second interface
13-first gas passage
14-second air passage
2-first pushing mechanism
21-first push rod
22-first seal
23-first push plate
3-second pushing mechanism
31-second push rod
32-second seal
33-second pusher plate
4-cam
41-driver
5-storage tank
51-liquid level detection mechanism
52-pressure detection mechanism
53-tank line
6-carbon tank
61-carbon tank purge valve
7-controller
8-engine
9 atmosphere
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1 to 4, an embodiment of the present invention provides an electrically controlled valve, which includes a body 1, a cam 4, a first pushing mechanism 2, and a second pushing mechanism 3; a first interface 11 and a second interface 12 are respectively arranged on two opposite sides of the body 1, in this embodiment, the first interface 11 is used for being connected with the storage tank 5, and the second interface 12 is used for being communicated with the atmosphere 9; the cam 4 is rotatably arranged in the body 1, in the embodiment, the cam 4 is controlled by a driving device to rotate, and the driver 41 can be connected with a controller 7 of the fuel system; one end of the first pushing mechanism 2 is abutted against the cam 4, and the other end of the first pushing mechanism 2 is used for closing or opening the first interface 11; one end of the second pushing mechanism 3 abuts against the cam 4, and the other end of the second pushing mechanism 3 is used for closing or opening the second interface 12.
When a fuel filling signal is detected, the cam 4 can be driven to rotate, so that the parts, with smaller diameters, on the two sides of the protruding part on the cam 4 are respectively contacted with the first pushing mechanism 2 and the second pushing mechanism 3, at this time, the first pushing mechanism 2 and the second pushing mechanism 3 are respectively separated from the first interface 11 and the second interface 12, namely, the first interface 11 and the second interface 12 are in an open state, as shown in fig. 1, so that gas in the storage tank 5 is discharged in the filling process, and the problem that the fuel filling is difficult due to the fact that the pressure in the storage tank 5 rises too fast in the filling process is avoided.
When fuel is filled to a preset liquid level, the cam 4 is controlled to rotate, the protruding portion on the cam 4 is abutted to the first pushing mechanism 2, so that the first pushing mechanism 2 can be pushed to close the first interface 11, as shown in fig. 2, the pressure in the storage tank 5 is rapidly increased, and the gun jump of the filling gun is realized. The position of the projection abutting against the first pushing mechanism 2 may be a position of the cam 4 having the largest diameter.
In this embodiment, the sum of the maximum diameter of the cam 4, the length of the first pushing mechanism 2, and the length of the second pushing mechanism 3 is smaller than the distance between the first hub 11 and the second hub 12. When the cam 4 abuts against the first pushing mechanism 2 at the protrusion with the largest diameter, the first pushing mechanism 2 can be pushed by the cam 4 to close the first port 11, and the second pushing mechanism 3 is separated from the second port 12, so that the second port 12 is kept in an open state.
When refilling is needed after gun jump, the cam 4 can be controlled to rotate by a certain angle, which can be 30-60 degrees, so that the first pushing mechanism 2 is slightly separated from the first interface 11, the first interface 11 is partially opened, and overlarge refilling amount caused by the fact that the first interface 11 is completely opened is avoided, as shown in fig. 3; when the fuel filling level reaches the maximum value, the cam 4 may be controlled to rotate again, so that the protrusion is aligned and abutted with the first pushing mechanism 2, so as to close the first port 11 by the first pushing mechanism 2.
When the vehicle needs to meet the monitoring starting condition of an on-board diagnostic system (OBD), the cam 4 can be controlled to rotate, the protruding part on the cam 4 is enabled to rotate to the position abutted against the second pushing mechanism 3, the second interface 12 communicated with the atmosphere 9 is sealed through the second pushing mechanism 3, the first interface 11 is kept in an open state, as shown in fig. 4, the fuel system is sealed, the pressure condition of the fuel system within a fixed time is detected through the pressure detection mechanism 52, and whether the fuel system leaks or not is judged. In this embodiment, the OBD detection module may be arranged at an end of the second interface 12 near the atmosphere 9.
Further, at the start of the vehicle operation, if the canister purge valve 61 needs to be desorbed, the canister purge valve 61 may be opened, and the second port 12 may be placed in an open state by rotating the cam 4. When the engine 8 inhales, the air flow flows from the atmosphere 9 to the second port 12, and may enter the engine 8 after passing through the canister purge valve 61 and the canister purge valve 61, so as to realize desorption purge of the canister purge valve 61 through the canister purge valve 61.
When the storage tank 5 also has a purification requirement, the cam 4 can be rotated, so that the convex parts on the cam 4 are not contacted with the first pushing mechanism 2 and the second pushing mechanism 3, and the first connector 11 and the second connector 12 are both in an open state, thereby mixing or exchanging fresh air with fuel steam in the storage tank 5, and achieving the purpose of purifying the storage tank 5.
Therefore, the electric control valve provided by the embodiment of the invention can participate in and realize multiple functions of fuel oil filling control, fuel oil system leakage auxiliary detection and carbon tank purification valve 61 and storage tank 5 desorption purification, and replaces the application of an oil tank isolation valve, a mechanical valve and a carbon tank purification valve 61 electromagnetic valve in the prior art, so that the fuel oil system has higher integration level, and the development cost is greatly reduced.
Further, the first pushing mechanism 2 includes a first push rod 21, a first sealing member 22 and a first push plate 23, two ends of the first push rod 21 are respectively fixedly connected with the first push plate 23 and the first sealing member 22, the first push plate 23 abuts against the cam 4, and the first sealing member 22 is used for closing or opening the first port 11; the second pushing mechanism 3 includes a second pushing rod 31, a second sealing member 32 and a second pushing plate 33, two ends of the second pushing rod 31 are respectively fixedly connected with the second pushing plate 33 and the second sealing member 32, the second pushing plate 33 abuts against the cam 4, and the second sealing member 32 is used for closing or opening the second port 12.
Wherein, a slideway can be arranged in the body 1 to ensure the stability of the movement of the first push rod 21 and the second push rod 31. It will be appreciated that the circumferential dimensions of the first and second seals 22, 32 are larger than the first and second ports 11, 12, respectively, to ensure a complete seal against the first and second ports 11, 12. Of course, the first sealing member 22 and the second sealing member 32 may be made of a flexible material, and when the first sealing member 22 or the second sealing member 32 is pressed to the first port 11 or the second port 12, the sealing effect may be ensured by elastic deformation of the first sealing member 22 or the second sealing member 32.
In order to ensure that the first pushing mechanism 2 and the second pushing mechanism 3 can always keep contact with the cam 4, an elastic member may be further disposed in the body 1, and the elastic member provides an elastic force to ensure that the first pushing mechanism 2 and the second pushing mechanism 3 are in close contact with the cam 4, wherein the elastic member may be a spring.
Further, a first air passage 13 and a second air passage 14 are arranged on the body 1, the first air passage 13 is communicated with the first interface 11, and the second air passage 14 is communicated with the second interface 12.
In the filling process, fuel vapor in the storage tank 5 can enter the carbon canister purge valve 61 after sequentially passing through the first interface 11 and the first air passage 13, and after oil is adsorbed and filtered by the carbon canister purge valve 61, purer gas can be discharged to the atmosphere 9 sequentially passing through the second air passage 14 and the second interface 12.
And when canister purge valve 61 needs desorption to purify, the air can get into canister purge valve 61 through second interface 12 and second air flue 14 in proper order to realize the purification to canister purge valve 61 through canister purge valve 61.
An embodiment of the present invention further provides a fuel system, as shown in fig. 1, which includes the electronic control valve provided in any embodiment of the present invention, and the fuel system includes a storage tank 5, a canister purge valve 61, a liquid level detection mechanism 51, a pressure detection mechanism 52, and a controller; wherein, the storage tank 5 is communicated with the first interface 11; the carbon tank purification valve 61 is connected with the engine 8, an air inlet of the carbon tank purification valve 61 is communicated with a first air passage 13 on the electric control valve, and an air outlet of the carbon tank purification valve 61 is communicated with a second air passage 14 of the electric control valve; the liquid level detection mechanism 51 is arranged on the storage tank 5; the pressure detection mechanism 52 is provided on the tank 5; the controller is connected to the liquid level detection mechanism 51 and the pressure detection mechanism 52, respectively, and is also connected to the driver 41 for controlling the rotation of the cam 4.
The liquid level detection mechanism 51 may be a liquid level sensor, and the pressure detection mechanism 52 may be a pressure sensor.
When a filling signal is detected, the first interface 11 and the second interface 12 can be opened through rotation of the control cam 4, the pressure in the storage tank 5 is detected through the pressure detection mechanism 52, if the detected pressure is smaller than a preset limit value, the filling small door is opened for filling, and if the pressure is larger than the preset limit value, fuel oil is reversely sprayed due to overhigh pressure when the filling small door is opened. During filling, the actual level of fuel in the tank 5 can be detected by the level detection means 51, and if the actual level reaches the target level, filling is stopped, the filling flap is closed, the cam 4 is rotated so that the first port 11 is closed and the second port 12 is opened to seal the tank 5.
Further, the fuel system further includes a canister purge valve 61, the canister purge valve 61 being disposed between the canister purge valve 61 and the engine 8, the canister purge valve 61 being connected to the controller 7.
When the vehicle starts running, if the canister purge valve 61 needs to be desorbed, the canister purge valve 61 may be opened, and the second connector 12 may be placed in an open state by rotating the cam 4. When the engine 8 inhales, the air flow flows from the atmosphere 9 to the second port 12, and may enter the engine 8 after passing through the canister purge valve 61 and the canister purge valve 61, so as to realize desorption purge of the canister purge valve 61 through the canister purge valve 61.
When the storage tank 5 also has a purification requirement, the cam 4 can be rotated, and the convex parts on the cam 4 are not contacted with the first pushing mechanism 2 and the second pushing mechanism 3, so that the first connector 11 and the second connector 12 are both in an open state, and therefore, fresh air can be mixed or exchanged with fuel steam in the storage tank 5, and the purpose of purifying the storage tank 5 is achieved.
It will be understood that, in order to facilitate the connection of the tank 5 to the electronic control valve, the fuel system may further comprise a tank pipe 53, an air outlet may be provided above the tank 5, and both ends of the tank pipe are respectively communicated with the air outlet and the first port 11.
The embodiment of the invention also provides a fuel filling control method, which adopts the fuel system provided by any embodiment of the invention, and the control method comprises the following steps:
and step S1, acquiring a filling signal.
And step S2, controlling the cam in the electric control valve to rotate so that the parts of the cam, which are positioned at the two sides of the bulge part, are respectively contacted with the first pushing mechanism and the second pushing mechanism.
The parts of the cam on the two sides of the bulge can be the parts with the smallest diameter on the cam, so that the first connector and the second connector can be completely opened.
Step S3, judging whether the filling liquid level reaches a preset liquid level; if so, the process proceeds to step S4.
And step S4, stopping filling, and controlling the cam to rotate to the position where the convex part is aligned with the first pushing mechanism so as to close the first interface through the first pushing mechanism and open the second interface through the second pushing mechanism.
And step S5, acquiring a supplementary notes signal.
And step S6, controlling the cam to rotate to make the convex part deviate from the set angle of the first pushing mechanism.
The angle may be 30 ° to 60 °, so that the first interface may be opened by a small opening degree.
And step S7, refilling the storage tank.
Step S8, the cam is controlled to rotate again to the position where the convex part is aligned with the first pushing mechanism, so as to close the first interface through the first pushing mechanism and open the second interface through the second pushing mechanism.
The embodiment of the invention also provides a fuel leakage detection method, which adopts the fuel system provided by any embodiment of the invention, and the detection method comprises the following steps:
and step S10, acquiring an on-board diagnostic system (OBD) detection signal.
And step S20, controlling the cam to rotate to enable the protruding part to rotate to a position aligned with the second pushing mechanism so as to close the second interface through the second pushing mechanism and open the first interface through the first pushing mechanism.
Step S30, after the detection is finished, the control cam rotates to the position where the protruding part is aligned with the first pushing mechanism, so that the first interface is closed through the first pushing mechanism, and the second interface is opened through the second pushing mechanism
When the vehicle needs to meet the monitoring starting condition of an on-board diagnostic system (OBD), the cam can be controlled to rotate, the protruding portion on the cam is enabled to rotate to the position abutted to the second pushing mechanism, the second interface communicated with the atmosphere is sealed through the second pushing mechanism, the first interface is kept in an opening state, as shown in fig. 4, the fuel system is sealed, the pressure condition of the fuel system in a fixed time is detected through the pressure detection mechanism, and whether leakage exists in the fuel system is judged.
The embodiment of the invention also provides a carbon tank desorption method, which adopts the fuel oil system provided by any embodiment of the invention, and comprises the following steps:
and S100, acquiring a carbon tank desorption signal.
And step S200, opening a carbon tank purification valve.
And step S300, controlling the cam to rotate so that the protruding part rotates to any position in the area between the position aligned with the first pushing mechanism and the position vertical to the movement direction of the first pushing mechanism.
Wherein, when the vehicle began the operation, if the carbon tank needs the desorption, can open the carbon tank purge valve to rotate the cam to the position that bulge and second pushing mechanism align, make the second interface be in the open mode, make first interface totally enclosed simultaneously. When the engine breathes in, the air current flows to the second interface from the atmosphere to can get into the engine behind carbon tank and the carbon tank purge valve, with the desorption purification that realizes the carbon tank through the carbon tank purge valve.
When the storage tank also has a purification requirement, the cam can be rotated, the protruding part on the cam is not contacted with the first pushing mechanism and the second pushing mechanism, so that the first interface and the second interface are both in an open state, and therefore fresh air can be mixed or exchanged with fuel steam in the storage tank, and the purpose of purifying the storage tank is achieved. Wherein an angle between the projection and the first pushing mechanism may be greater than 0 ° and less than or equal to 90 °. When the angle between the protrusion and the first pushing mechanism may be greater than 0 ° and less than 90 °, the first interface is not fully opened; when the angle between the protruding part and the first pushing mechanism is equal to 90 degrees, the first interface is completely opened; in this embodiment, the first interface can be fully opened, i.e. the projection is rotated to a position where the angle between it and the first pushing mechanism is equal to 90 °, when purging the tank.
Step S400, after the desorption is finished, closing the carbon tank purification valve, controlling the cam to rotate to or keep the protruding part at the position aligned with the first pushing mechanism so as to seal the first interface through the first pushing mechanism, and opening the second interface through the second pushing mechanism
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (9)

1. An electrically controlled valve, comprising:
the connector comprises a body (1), wherein a first interface (11) and a second interface (12) are respectively arranged on two opposite sides of the body (1);
a cam (4), said cam (4) being rotatably arranged in said body (1);
the first pushing mechanism (2), one end of the first pushing mechanism (2) is abutted to the cam (4), and the other end of the first pushing mechanism (2) is used for closing or opening the first interface (11);
one end of the second pushing mechanism (3) is abutted to the cam (4), and the other end of the second pushing mechanism (3) is used for closing or opening the second interface (12).
2. The electric control valve according to claim 1, characterized in that the first pushing mechanism (2) comprises a first push rod (21), a first sealing member (22) and a first push plate (23), wherein two ends of the first push rod (21) are fixedly connected with the first push plate (23) and the first sealing member (22), respectively, the first push plate (23) is abutted with the cam (4), and the first sealing member (22) is used for closing or opening the first interface (11);
the second pushing mechanism (3) comprises a second push rod (31), a second sealing piece (32) and a second push plate (33), two ends of the second push rod (31) are fixedly connected with the second push plate (33) and the second sealing piece (32) respectively, the second push plate (33) is abutted to the cam (4), and the second sealing piece (32) is used for closing or opening the second interface (12).
3. The electric control valve according to claim 1, characterized in that a first air passage (13) and a second air passage (14) are provided on the body (1), the first air passage (13) communicating with the first port (11), the second air passage (14) communicating with the second port (12).
4. A fuel system comprising an electrically controlled valve according to any one of claims 1 to 3, the fuel system further comprising:
a tank (5), said tank (5) communicating with said first interface (11);
the carbon tank purification valve (61), the carbon tank purification valve (61) is connected with an engine (8), an air inlet of the carbon tank purification valve (61) is communicated with a first air passage (13) on the electric control valve, and an air outlet of the carbon tank purification valve (61) is communicated with a second air passage (14) of the electric control valve;
a liquid level detection mechanism (51) provided on the tank (5);
a pressure detection mechanism (52) provided on the tank (5);
and the controller is respectively connected with the liquid level detection mechanism (51) and the pressure detection mechanism (52).
5. The fuel system as recited in claim 4, further comprising a canister purge valve (61), the canister purge valve (61) being disposed between the canister purge valve (61) and the engine (8), the canister purge valve (61) being connected to the controller (7).
6. The fuel system as recited in claim 4, characterized in that it further comprises a tank pipe, an air outlet is arranged above the tank (5), and two ends of the tank pipe (53) are respectively communicated with the air outlet and the first port (11).
7. A fuel filling control method, characterized in that the fuel system of any one of claims 5-6 is used, the method comprising the steps of:
acquiring a filling signal;
controlling a cam in the electric control valve to rotate so that the parts, positioned on two sides of the protruding part, of the cam are respectively contacted with the first pushing mechanism and the second pushing mechanism;
judging whether the filling liquid level reaches a preset liquid level or not;
if yes, stopping filling, controlling the cam to rotate to a position where the protruding part is aligned with the first pushing mechanism so as to close the first interface through the first pushing mechanism, and opening the second interface through the second pushing mechanism;
acquiring a supplementary injection signal;
controlling the cam to rotate to enable the protruding part to deviate from the angle set by the first pushing mechanism;
refilling the storage tank;
and controlling the cam to rotate to the position where the convex part is aligned with the first pushing mechanism again so as to close the first interface through the first pushing mechanism and open the second interface through the second pushing mechanism.
8. A fuel leakage detection method, characterized by using the fuel system according to any one of claims 5-6, said method comprising the steps of:
acquiring a detection signal of a vehicle-mounted diagnosis system;
controlling the cam to rotate to enable the protruding part to rotate to a position aligned with the second pushing mechanism so as to close the second interface through the second pushing mechanism and open the first interface through the first pushing mechanism;
after detection is finished, the cam is controlled to rotate to a position where the protruding portion is aligned with the first pushing mechanism, so that the first interface is closed through the first pushing mechanism, and the second interface is opened through the second pushing mechanism.
9. A carbon tank desorption method, characterized in that the fuel system of any one of claims 5-6 is adopted, and the method comprises the following steps:
acquiring a carbon tank desorption signal;
opening a carbon tank purification valve;
controlling the cam to rotate to enable the protruding part to rotate to any position of an area between a position aligned with the first pushing mechanism and a position perpendicular to the movement direction of the first pushing mechanism;
after the desorption is finished, closing the carbon tank purification valve, controlling the cam to rotate to or keep at the position where the protruding part is aligned with the first pushing mechanism, so that the first interface is closed through the first pushing mechanism, and the second interface is opened through the second pushing mechanism.
CN202011142610.7A 2020-10-22 2020-10-22 Electric control valve, fuel system, fuel filling and leakage detection and carbon tank desorption method Withdrawn CN112360651A (en)

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