CN115339313A

CN115339313A - Control method and device of fuel evaporative emission system, vehicle and medium

Info

Publication number: CN115339313A
Application number: CN202211008803.2A
Authority: CN
Inventors: 宋泽雨; 张琪; 董心
Original assignee: Beijing Automotive Research Institute Co Ltd
Current assignee: Beijing Automotive Research Institute Co Ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-11-15

Abstract

The application relates to the technical field of vehicle fuel systems, in particular to a control method, a control device, a vehicle and a control medium of a fuel evaporative emission system, wherein the fuel evaporative emission system comprises: the oil tank pressure detection piece, pressure relief spare and setting up the executive component on refueling cover plate, the method includes: detecting whether a refueling instruction of a vehicle is received or not, and controlling a pressure relief piece to be opened when the refueling instruction is received so as to release oil vapor in an oil tank into the atmosphere; receiving the current oil tank pressure sent by an oil tank pressure detection piece, and judging whether the current oil tank pressure is smaller than or equal to a preset starting threshold value or not; and when the current oil tank pressure is less than or equal to the preset opening threshold value, sending an oiling cover plate opening instruction to the executive component so as to perform oiling after the oiling cover plate is opened through the executive component. The problem of in the oil tank carries out evaporation diagnosis testing process, because the low pressure influence in the oil tank leads to the unable normal open of fuel tank cap and has the potential safety hazard scheduling is solved, the risk that the fuel tank cap can't be opened has been avoidd.

Description

Control method and device of fuel evaporative emission system, vehicle and medium

Technical Field

The application relates to the technical field of vehicle fuel systems, in particular to a control method and device of a fuel evaporative emission system, a vehicle and a medium.

Background

Because a hybrid vehicle is formed by combining an internal combustion engine and an electric motor as a power source, an oil tank carried by the hybrid vehicle needs to be subjected to evaporation diagnosis and monitoring according to the requirements of national six laws and regulations.

However, in the normal diagnostic process, the current vehicle control strategy is to pump vacuum to the tank by the intake air flow of the engine, build pressure in the form of negative pressure, and monitor whether there is leakage in the tank and the pipes. Because the exhaust valve does not open under normal conditions, only can open at evaporation diagnostic process, make the long-time accumulation of fuel steam in the oil tank like this, form high vacuum, so high fuel steam can keep under non-fuel engine operating conditions such as pure electric vehicles always, unable pressure release, and the consequence that brings is the fuel tank cap because atmospheric pressure's influence, leads to the condition that the fuel tank cap can't normally open, awaits a urgent need to solve.

Disclosure of Invention

The application provides a control method, a control device, a control vehicle and a control medium of a fuel oil evaporation emission system, and solves the problems that in the process of evaporation diagnosis detection of an oil tank, a fuel tank cap cannot be normally opened due to the influence of low pressure in the oil tank, so that potential safety hazards exist, and the like, and the risk that the fuel tank cap cannot be opened is avoided.

An embodiment of the first aspect of the present application provides a control method for an evaporative emission system, where the evaporative emission system includes: oil tank pressure detection spare, pressure relief spare and set up the executive component on refueling the apron, including following step: detecting whether a refueling instruction of a vehicle is received or not, and controlling the pressure relief piece to be opened when the refueling instruction is received so as to release oil vapor in the oil tank into the atmosphere; receiving the current oil tank pressure sent by the oil tank pressure detection piece, and judging whether the current oil tank pressure is smaller than or equal to a preset starting threshold value; and when the current oil tank pressure is less than or equal to the preset opening threshold value, sending an oil filling cover plate opening instruction to the executive component so as to fill oil after the oil filling cover plate is opened by the executive component.

Optionally, the control method of the evaporative emission system further includes: detecting whether a cover plate closing signal sent by the executive component is received or not; and if the cover plate closing signal is received, generating a closing instruction of the pressure relief piece according to the cover plate closing signal, and sending the closing instruction to the pressure relief piece to close the pressure relief piece and stop releasing the oil vapor in the oil tank into the atmosphere.

Optionally, the control method of the evaporative emission system further includes: detecting a current operating mode of the vehicle; and if the current running mode is the pure electric mode, controlling the pressure relief piece to be closed, and isolating the oil tank from the engine so as to control the oil vapor in the oil tank.

Optionally, the control method of the evaporative emission system further includes: if the current operation mode is a hybrid mode, detecting the operation state of the engine; when the engine is in a running state, the pressure relief piece is controlled to be opened, so that oil vapor in the oil tank enters an air inlet manifold of the engine through a carbon tank electromagnetic valve and is discharged into the atmosphere through the air inlet manifold of the engine.

In a second aspect, an embodiment of the present application provides a control device for an evaporative emission system, including: the first detection module 100 is configured to detect whether a refueling instruction of a vehicle is received, and control the pressure relief piece to be opened when the refueling instruction is received, so as to release oil vapor in the oil tank into the atmosphere; the judging module 200 is configured to receive a current oil tank pressure sent by the oil tank pressure detecting element, and judge whether the current oil tank pressure is less than or equal to a preset starting threshold; and the refueling module 300 is configured to send a refueling cover plate opening instruction to the actuator when the current tank pressure is less than or equal to the preset opening threshold, so as to refuel after the refueling cover plate is opened by the actuator.

Optionally, the control device for an evaporative emission system of fuel further includes: the second detection module is used for detecting whether a cover plate closing signal sent by the executive component is received or not; and the first control module is used for generating a closing instruction of the pressure relief piece according to the cover plate closing signal and sending the closing instruction to the pressure relief piece to close the pressure relief piece and stop releasing the oil vapor in the oil tank into the atmosphere if the cover plate closing signal is received.

Optionally, the control device of the evaporative emission system further includes: the third detection module is used for detecting the current running mode of the vehicle; and the second control module is used for controlling the pressure relief piece to be closed and isolating the oil tank and the engine if the current operation mode is a pure electric mode so as to control oil vapor in the oil tank.

Optionally, the control device of the evaporative emission system further includes: the fourth detection module is used for detecting the running state of the engine if the current running mode is a hybrid mode; and the third control module is used for controlling the pressure relief piece to be opened when the engine is in a running state, so that oil vapor in the oil tank enters an air inlet manifold of the engine through a carbon tank electromagnetic valve and is discharged into the atmosphere through the air inlet manifold of the engine.

An embodiment of a third aspect of the present application provides a vehicle, comprising: the fuel evaporative emission system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the control method of the fuel evaporative emission system according to the embodiment.

A fourth aspect of the present invention provides a computer-readable storage medium, having a computer program stored thereon, where the program is executed by a processor, and is used for implementing the control method of the evaporative emission system as described in the above embodiments.

From this, through detecting whether receive the refuel instruction of vehicle to when receiving the instruction of refueling, control pressure release piece opens, in order to let out the oil vapor in the oil tank into the atmosphere, receive the current oil tank pressure that oil tank pressure detection piece sent, and judge whether current oil tank pressure is less than or equal to and predetermine the opening threshold value, when current oil tank pressure is less than or equal to and predetermines the opening threshold value, send and refuel apron and open instruction to the executive, refuel after opening refuel the apron through the executive. The problem of in the oil tank carries out evaporation diagnosis testing process, because the low pressure influence in the oil tank leads to the unable normal open of fuel tank cap and has the potential safety hazard scheduling is solved, the risk that the fuel tank cap can't be opened has been avoidd.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a flow chart of a method of controlling an evaporative emission system according to an embodiment of the present application;

FIG. 2 is a schematic illustration of fueling mode control according to one embodiment of the present application;

FIG. 3 is a schematic illustration of a pure electric mode control according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a hybrid mode control according to one embodiment of the present application;

FIG. 5 is a block schematic diagram of a control device of the evaporative emission system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

A control method, device, vehicle, and medium of the evaporative emission system of the embodiment of the present application are described below with reference to the drawings. In view of the above-mentioned problem that the potential safety hazard exists because the low pressure influence in the fuel tank leads to the unable normal open of fuel tank cap in the evaporation diagnosis testing process of fuel tank that the background art center mentioned, the application provides a control method of fuel evaporative emission system, and the fuel evaporative emission system includes: the method comprises the steps of detecting whether an oiling instruction of a vehicle is received or not, controlling the pressure relief piece to be opened when the oiling instruction is received, so that oil vapor in the oil tank is leaked into the atmosphere, receiving the current oil tank pressure sent by the oil tank pressure detection piece, judging whether the current oil tank pressure is smaller than or equal to a preset opening threshold value or not, sending the oiling cover plate opening instruction to an execution piece when the current oil tank pressure is smaller than or equal to the preset opening threshold value, and oiling after the oiling cover plate is opened through the execution piece. Therefore, the problem that in the process of evaporation diagnosis and detection of the oil tank, the oil tank cover cannot be normally opened due to the influence of low pressure in the oil tank, potential safety hazards exist and the like is solved, and the risk that the oil tank cover cannot be opened is avoided.

Specifically, fig. 1 is a flowchart of a control method of an evaporative emission system according to an embodiment of the present application.

In this embodiment, the evaporative emission system includes: the oil tank pressure detection device comprises an oil tank pressure detection part, a pressure relief part and an execution part arranged on an oil filling cover plate.

As shown in fig. 1, the control method of the evaporative emission system includes the steps of:

in step S101, it is detected whether a refueling instruction of the vehicle is received, and when the refueling instruction is received, the pressure relief member is controlled to open, so as to release the oil vapor in the oil tank into the atmosphere.

Specifically, as shown in fig. 2, when the driver refuels, the driver triggers a refueling button connected to a Vehicle Control Unit (VCU) to wake up the VCU, and when the VCU receives a refueling button signal, the VCU opens a pressure relief element through an electrical signal to release low-pressure fuel vapor in the fuel tank, and the fuel vapor is adsorbed by a carbon canister and then discharged to the atmosphere.

In step S102, the current tank pressure sent by the tank pressure detecting element is received, and it is determined whether the current tank pressure is less than or equal to a preset opening threshold.

In step S103, when the current tank pressure is less than or equal to the preset opening threshold, an oil filling cover plate opening instruction is sent to the actuator, so that the oil is filled after the oil filling cover plate is opened by the actuator.

Specifically, the VCU receives the current tank pressure detected by the tank pressure detection part, compares the current tank pressure with a preset opening threshold value, and opens the oil filling cover plate through the actuating part arranged on the oil filling cover plate to fill oil when the pressure value is less than or equal to the preset opening threshold value.

The preset starting threshold may be a threshold preset by a user, may be a threshold obtained through a limited number of experiments, or may be a threshold obtained through a limited number of computer simulations, which is not specifically limited herein.

Optionally, in some embodiments, the control method of the evaporative emission system further includes:

detecting whether a cover plate closing signal sent by an executive component is received or not; and if the cover plate closing signal is received, generating a closing instruction of the pressure relief piece according to the cover plate closing signal, and sending the closing instruction to the pressure relief piece so as to close the pressure relief piece and stop releasing the oil vapor in the oil tank into the atmosphere.

Specifically, when the VCU receives a cover plate closing signal sent by the actuator, and the VCU closes the pressure relief member according to the closing signal, the oil vapor in the oil tank stops being released into the atmosphere.

Optionally, in some embodiments, the method for controlling an evaporative emission system further includes:

detecting a current operating mode of the vehicle; if the current operation mode is the pure electric mode, the pressure relief piece is controlled to be closed, and the oil tank and the engine are isolated, so that oil vapor in the oil tank is controlled in the oil tank.

It will be appreciated that the current operating mode of the vehicle is detected, and as shown in fig. 3, if the current operating mode is pure electric mode, the VCU controls the pressure relief element to close, the fuel tank is isolated from the canister and the engine, and the fuel vapor is controlled inside the fuel tank.

if the current operation mode is a hybrid mode, detecting the operation state of the engine; when the engine is in a running state, the pressure relief piece is controlled to be opened, so that oil vapor in the oil tank enters an air inlet manifold of the engine through the carbon tank electromagnetic valve and is released into the atmosphere through the air inlet manifold of the engine.

It CAN be understood that, as shown in fig. 4, if the current operation mode is the hybrid mode, the VCU and the EMS (Engine Management System) communicate with each other through a Controller Area Network (CAN) to confirm the operation state of the Engine, and when the Engine is in the operation state, the VCU controls to open the pressure relief member, so that the oil vapor in the oil tank CAN enter the intake manifold of the Engine through the canister solenoid valve and be released into the atmosphere.

According to the control method of the fuel evaporative emission system, whether a refueling instruction of a vehicle is received or not is detected, and when the refueling instruction is received, the pressure relief piece is controlled to be opened to release oil vapor in the oil tank into the atmosphere, the current oil tank pressure sent by the oil tank pressure detection piece is received, whether the current oil tank pressure is smaller than or equal to a preset opening threshold value or not is judged, when the current oil tank pressure is smaller than or equal to the preset opening threshold value, a refueling cover plate opening instruction is sent to the execution piece, and refueling is carried out after the refueling cover plate is opened through the execution piece. Therefore, the problem that in the process of evaporation diagnosis and detection of the oil tank, the oil tank cover cannot be normally opened due to the influence of low pressure in the oil tank, potential safety hazards exist and the like is solved, and the risk that the oil tank cover cannot be opened is avoided.

Next, a control device of an evaporative emission system proposed according to an embodiment of the present application will be described with reference to the drawings.

Fig. 5 is a block diagram schematically showing a control device of the evaporative emission system according to the embodiment of the present application.

As shown in fig. 5, the control device 10 of the evaporative emission system includes: a first detection module 100, a determination module 200, and a fueling module 300.

The first detection module 100 is configured to detect whether a refueling instruction of a vehicle is received, and when the refueling instruction is received, control the pressure relief piece to open to release oil vapor in the oil tank into the atmosphere; the judging module 200 is configured to receive a current tank pressure sent by the tank pressure detecting element, and judge whether the current tank pressure is less than or equal to a preset opening threshold; and the refueling module 300 is configured to send a refueling cover plate opening instruction to the actuator when the current fuel tank pressure is less than or equal to the preset opening threshold, so as to refuel after the refueling cover plate is opened by the actuator.

Optionally, in some embodiments, the control device 10 of the evaporative emission system further includes: the device comprises a second detection module and a first control module. The second detection module is used for detecting whether a cover plate closing signal sent by the executive component is received or not; and the first control module is used for generating a closing instruction of the pressure relief piece according to the cover plate closing signal if the cover plate closing signal is received, and sending the closing instruction to the pressure relief piece so as to close the pressure relief piece and stop releasing oil vapor in the oil tank into the atmosphere.

Optionally, in some embodiments, the control device 10 of the evaporative emission system further includes: the device comprises a third detection module and a second control module. The third detection module is used for detecting the current running mode of the vehicle; and the second control module is used for controlling the pressure relief piece to be closed and isolating the oil tank and the engine if the current running mode is the pure electric mode so as to control oil vapor in the oil tank.

Optionally, in some embodiments, the control device 10 of the evaporative emission system further includes: a fourth detection module and a third control module. The fourth detection module is used for detecting the running state of the engine if the current running mode is the hybrid mode; and the third control module is used for controlling the pressure relief piece to be opened when the engine is in a running state, so that oil vapor in the oil tank enters an air inlet manifold of the engine through the carbon tank electromagnetic valve and is released into the atmosphere through the air inlet manifold of the engine.

It should be noted that the foregoing explanation of the embodiment of the control method for the evaporative emission system of fuel is also applicable to the control device for the evaporative emission system of fuel of this embodiment, and will not be described again here.

According to the control device of the fuel evaporative emission system provided by the embodiment of the application, whether the refueling instruction of a vehicle is received or not is detected, and when the refueling instruction is received, the pressure relief piece is controlled to be opened, so that oil vapor in the oil tank is released into the atmosphere, the current oil tank pressure sent by the oil tank pressure detection piece is received, whether the current oil tank pressure is smaller than or equal to a preset opening threshold value or not is judged, when the current oil tank pressure is smaller than or equal to the preset opening threshold value, the fuel refueling cover plate opening instruction is sent to the execution piece, and fuel is refueled after the fuel refueling cover plate is opened through the execution piece. Therefore, the problem that in the process of evaporation diagnosis and detection of the oil tank, the oil tank cover cannot be normally opened due to the influence of low pressure in the oil tank, potential safety hazards exist and the like is solved, and the risk that the oil tank cover cannot be opened is avoided.

Fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present application. The vehicle may include:

a memory 601, a processor 602, and a computer program stored on the memory 601 and executable on the processor 602.

The processor 602, when executing the program, implements the control method of the evaporative emission system provided in the above-described embodiments.

Further, the vehicle further includes:

a communication interface 603 for communicating between the memory 601 and the processor 602.

The memory 601 is used for storing computer programs that can be run on the processor 602.

Memory 601 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.

Optionally, in a specific implementation, if the memory 601, the processor 602, and the communication interface 603 are integrated on a chip, the memory 601, the processor 602, and the communication interface 603 may complete mutual communication through an internal interface.

The processor 602 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.

Embodiments of the present application also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the evaporative emission system as above.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A method of controlling an evaporative emission system, the evaporative emission system comprising: the method comprises the following steps of:

detecting whether a refueling instruction of a vehicle is received or not, and controlling the pressure relief piece to be opened when the refueling instruction is received so as to release oil vapor in the oil tank into the atmosphere;

receiving the current oil tank pressure sent by the oil tank pressure detection piece, and judging whether the current oil tank pressure is smaller than or equal to a preset starting threshold value; and

and when the current oil tank pressure is less than or equal to the preset opening threshold value, sending an oil filling cover plate opening instruction to the executive component so as to fill oil after the oil filling cover plate is opened by the executive component.

2. The method of claim 1, further comprising:

detecting whether a cover plate closing signal sent by the executive component is received or not;

and if the cover plate closing signal is received, generating a closing instruction of the pressure relief piece according to the cover plate closing signal, and sending the closing instruction to the pressure relief piece to close the pressure relief piece and stop releasing the oil vapor in the oil tank into the atmosphere.

3. The method of claim 1, further comprising:

detecting a current operating mode of the vehicle;

and if the current running mode is the pure electric mode, controlling the pressure relief piece to be closed, and isolating the oil tank from the engine so as to control the oil vapor in the oil tank.

4. The method of claim 3, further comprising:

if the current operation mode is a hybrid mode, detecting the operation state of the engine;

when the engine is in a running state, the pressure relief piece is controlled to be opened, so that oil vapor in the oil tank enters an air inlet manifold of the engine through a carbon tank electromagnetic valve and is discharged into the atmosphere through the air inlet manifold of the engine.

5. A control apparatus for a fuel evaporative emission system, comprising:

the first detection module is used for detecting whether a refueling instruction of a vehicle is received or not, and controlling the pressure relief piece to be opened when the refueling instruction is received so as to release oil vapor in the oil tank into the atmosphere;

the judging module is used for receiving the current oil tank pressure sent by the oil tank pressure detecting piece and judging whether the current oil tank pressure is smaller than or equal to a preset opening threshold value or not; and

and the refueling module is used for sending a refueling cover plate opening instruction to the executive component when the current oil tank pressure is less than or equal to the preset opening threshold value so as to refuel after the refueling cover plate is opened through the executive component.

6. The apparatus of claim 5, further comprising:

the second detection module is used for detecting whether a cover plate closing signal sent by the executive component is received or not;

and the first control module is used for generating a closing instruction of the pressure relief piece according to the cover plate closing signal and sending the closing instruction to the pressure relief piece to close the pressure relief piece and stop releasing the oil vapor in the oil tank into the atmosphere if the cover plate closing signal is received.

7. The apparatus of claim 5, further comprising:

the third detection module is used for detecting the current running mode of the vehicle;

and the second control module is used for controlling the pressure relief piece to be closed if the current operation mode is a pure electric mode, and isolating the oil tank from the engine so as to control the oil vapor in the oil tank into the oil tank.

8. The apparatus of claim 5, further comprising:

the fourth detection module is used for detecting the current running mode of the vehicle;

and the third control module is used for controlling the pressure relief piece to be closed and isolating the oil tank and the engine if the current running mode is a pure electric mode so as to control the oil vapor in the oil tank.

9. A vehicle, characterized by comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the control method of the evaporative emission system as claimed in any one of claims 1 to 4.

10. A computer-readable storage medium on which a computer program is stored, the program being executed by a processor for implementing the control method of an evaporative emission system as set forth in any one of claims 1 to 4.