Control method and system for oil filler cap of high-pressure oil tank of hybrid electric vehicle

Abstract

The invention discloses a control method and system for an oil filler cap of a high-pressure oil tank during oil filling of a hybrid electric vehicle, and the method comprises the steps: judging the power gear of the vehicle after an oil filling button is pressed down; when the vehicle power supply is in the on gear, if the vehicle is in a driving permission state and an electronic parking brake system of the vehicle is pulled up, or the vehicle is in a driving non-permission state, whether the vehicle meets the precondition of refueling or not is judged; when the vehicle meets the precondition of refueling, a refueling port cover lock motor is controlled to be unlocked, an oil-gas isolation valve is controlled to be opened, and the opening and closing state of a refueling port micro-motion small door is recognized; when it is recognized that the small inching door is opened, refueling is started, and refueling ending is judged according to refueling ending conditions; and the oil filler cap lock motor is controlled to be locked and the oil-gas isolation valve is controlled to be closed. According to the invention, refueling can be carried out under the ON gear and the OFF gear of the vehicle power supply of the hybrid electric vehicle, and the oil-gas isolation valve and the oil port cover lock motor are controlled through the engine control system in the refueling process, so that the volatilization of oil steam is reduced.

Description

Technical Field

[0001] The present invention relates to the field of automobile control technology, and in particular to a control method and system for a fuel filler cap of a high-pressure fuel tank of a hybrid automobile. Background Art

[0002] The automobile fuel tank is a special container for storing hydraulic oil or hydraulic fluid. According to the pressure it can withstand, it can be divided into normal pressure tank and high pressure tank. When a hybrid car using a high pressure tank uses pure electric mode, the engine does not start, and the carbon canister is insufficiently adsorbed, which will cause oil vapor to evaporate outside the car. In particular, the oil vapor volatilized in the pure electric mode of PHEV (Plug-in hybrid electric vehicle) models will exceed the emission limit, so PHEV models use high pressure tanks and oil and gas isolation devices. Summary of the invention

[0003] The main purpose of the present invention is to provide a control method and system for a high-pressure fuel tank filler cap of a hybrid vehicle, so as to solve the problem that the engine of the hybrid vehicle does not start when using a pure electric mode, causing oil vapor to evaporate to the outside of the vehicle.

[0004] The technical solution adopted by the present invention is: a control method for a high-pressure fuel tank filler cap of a hybrid vehicle. In this solution, the vehicle engine management system is provided with a post-operation interface; the method comprises:

[0005] After the refueling button of the vehicle is pressed, it is determined whether the vehicle power is in the on gear or the off gear;

[0006] When the vehicle power is in the off position, the vehicle's engine management system is awakened by the refueling button, the post-operation interface is set to ensure the continuous operation of the engine management system, and whether the vehicle meets the refueling preconditions; when the vehicle power is in the on position, if the vehicle is in the driving permission state and the vehicle's electronic parking brake system is pulled up, or the vehicle is in the driving non-permitted state, it is determined whether the vehicle meets the refueling preconditions;

[0007] When the vehicle meets the pre-conditions for refueling, the engine management system controls the unlocking of the fuel filler cap lock motor and the opening of the oil and gas isolation valve, and identifies the open and closed status of the fuel filler inching door;

[0008] When it is recognized that the micro-motion door is open, refueling starts, and the refueling is judged to be finished according to the refueling end condition. If the vehicle power is in the off gear, after it is judged that the refueling is finished, the post-operation interface is reset to stop the operation of the engine management system;

[0009] The engine management system controls the locking of the fuel filler cap lock motor and the closing of the oil and gas isolation valve.

[0010] According to the above technical solution, when the vehicle power is in the on gear, if the vehicle is in the driving allowed state and the vehicle's electronic parking brake system is not pulled up, the information that the vehicle's electronic parking brake system is not pulled up is reminded to the driver through the in-vehicle infotainment system.

[0011] According to the above technical solution, the prerequisite for refueling is to meet the following conditions at the same time, and the conditions include: the oil and gas isolation valve has not been diagnosed as faulty; the high-pressure oil tank has not been diagnosed as faulty; the pressure of the high-pressure oil tank is within a preset range.

[0012] According to the above technical solution, if the micro-motion door is not opened within a preset time after the fuel filler cap lock motor is unlocked and the oil and gas isolation valve is opened, the fuel filler cap lock motor will be locked and the oil and gas isolation valve will be closed.

[0013] According to the above technical solution, after refueling begins, if the vehicle switches to the driving permission state and the vehicle speed is greater than the preset value while the micro-motion door is open, the fuel filler cap lock motor will be locked and the oil and gas isolation valve will be closed.

[0014] According to the above technical solution, after refueling starts, if the micro-sliding door is opened for longer than the preset time, the fuel filler cap lock motor is locked and the oil and gas isolation valve is closed.

[0015] According to the above technical solution, the refueling end condition is to meet any of the following conditions, including: the oil and gas isolation valve is diagnosed to be faulty; the high-pressure fuel tank is diagnosed to be faulty; the micro-movement door jumps from open to closed. Furthermore, when a fault is diagnosed, the driver is reminded through the vehicle information system.

[0016] According to the above technical solution, when it is recognized that the vehicle power jumps from the on gear to the off gear, the micro-motion door jumps from open to closed, and the closing time is greater than the preset time, the post-operation interface of the engine management system is set.

[0017] Another aspect of the present invention provides a control system for a high-pressure fuel tank filler cap when a hybrid vehicle is refueling. The system executes the above-mentioned control method for the high-pressure fuel tank filler cap when a hybrid vehicle is refueling.

[0018] Another aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-mentioned method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle.

[0019] The beneficial effects of the present invention are as follows: the present invention provides a control method and system for a high-pressure fuel tank fuel filler cap of a hybrid vehicle, which can control the refueling process in all vehicle states. The present invention is particularly suitable for PHEV models of hybrid vehicles, and can control the high-pressure fuel tank cap lock motor and the oil and gas isolation valve through the refueling button, the engine management system and the refueling cap micro-movement door when the vehicle power is in the ON gear and the OFF gear, thereby completing the refueling process.

[0020] Furthermore, when the vehicle power is in the ON gear for refueling, if the present invention identifies that the vehicle is in the driving permission state and the electronic parking brake system is not pulled up, the driver is reminded through the vehicle information system to ensure the safety of passengers, vehicles and property;

[0021] Furthermore, the present invention provides a forgetting process for the micro-movement door of the fuel filler cap. When the refueler forgets to close the micro-movement door, the vehicle speed exceeds the limit or the micro-movement door is not closed for a certain period of time, refueling is terminated, the oil and gas isolation valve is closed, and oil and gas volatilization is reduced;

[0022] Furthermore, the present invention can identify the vehicle moving and refueling conditions through the changes in the vehicle gear position and the micro-motion door, thereby reducing the repeated refueling operations of the drivers in the gas station.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a flow chart of a method for controlling a high-pressure fuel tank filler cap when refueling a hybrid vehicle according to an embodiment of the present invention;

[0026] Figure 2 is a flow chart of a method for controlling a high-pressure fuel tank filler cap when refueling a hybrid vehicle according to another embodiment of the present invention;

[0027] Figure 3 It is a principle block diagram of a method for controlling a high-pressure fuel tank filler cap when refueling a hybrid vehicle according to an embodiment of the present invention;

[0028] Figure 4 It is a flow chart of a method for identifying a vehicle moving and refueling condition in a method for controlling a high-pressure fuel tank fuel filler cap when refueling a hybrid vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that the illustrations provided in the embodiments of the present invention are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout type may also be more complicated.

[0031] In the present invention, it is also necessary to explain that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first" and "second" appear, they are only used for description and distinction purposes, and cannot be understood as indicating or implying relative importance.

[0032] Example 1

[0033] This embodiment provides a method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle. The process is as follows: Figure 1 As shown, including:

[0034] S1. After the refueling button of the vehicle is pressed, it is determined whether the vehicle power is in the on gear or the off gear. When the vehicle power is in the off gear, pressing the refueling button inputs a high level to wake up the vehicle's engine management system.

[0035] S2. When the vehicle power is in the off position, the vehicle's engine management system is awakened by the refueling button, and the post-operation interface is set to ensure the continuous operation of the engine management system and determine whether the vehicle meets the refueling preconditions; when the vehicle power is in the on position, if the vehicle is in the driving allowed state and the vehicle's electronic parking brake system is pulled up, or the vehicle is in the driving not allowed state, determine whether the vehicle meets the refueling preconditions.

[0036] Furthermore, the engine management system is provided with a post-operation interface. When the post-operation interface is set, the engine management system is awakened after a preset delay time, so as to ensure that the engine management system continues to work when the vehicle power is in the off gear; when the post-operation interface is reset, the engine management system stops running and enters a sleep state after a preset delay time.

[0037] Furthermore, when the vehicle power is in the on position, except for the situation described in step S2, if the vehicle is in the driving allowed state but the vehicle's electronic parking brake system is not pulled up, in order to ensure the safety of passengers' lives and property and prevent the vehicle from accidentally moving during refueling, in this embodiment, the execution process of the refueling control method is immediately terminated, and the driver is reminded to pull up the vehicle's electronic parking brake system through the vehicle information system.

[0038] Furthermore, the prerequisite for refueling is to simultaneously meet the following conditions, which include: during the refueling process: the oil and gas isolation valve and the high-pressure oil tank operate normally without failure, and the pressure inside the high-pressure oil tank is within a preset range.

[0039] S3. When the vehicle meets the prerequisites for refueling, the engine management system controls the fuel filler cap lock motor to unlock and the oil and gas isolation valve to open, and identifies the open and closed state of the fuel filler cap micro-motion door.

[0040] Furthermore, a sensor is provided next to the micro-motion door for accurately identifying its opening and closing status.

[0041] S4. When it is recognized that the micro-motion door is open, refueling starts, and the refueling is terminated according to the refueling termination condition. If the vehicle power is in the off gear, the post-operation interface is reset after the refueling is terminated, and the operation of the engine management system is stopped.

[0042] Furthermore, the present embodiment can identify and process the delayed door opening forgotten condition, which is specifically manifested as: if the micro-motion door is not opened within a preset time after the fuel filler cap lock motor is unlocked and the oil and gas isolation valve is opened, the fuel filler cap lock motor will be locked and the oil and gas isolation valve will be closed.

[0043] Furthermore, the present embodiment can identify and process the delayed door opening forgotten condition, which is specifically manifested as follows: after refueling begins, if the micro-sliding door is opened for more than a preset time, the fuel filler cap lock motor is locked and the oil and gas isolation valve is closed.

[0044] By identifying and handling delayed door opening and forgotten conditions, the problem of large oil vapor volatilization caused by forgetting to open the micro-motion door before refueling or forgetting to close the micro-motion door after refueling can be avoided.

[0045] Furthermore, after refueling begins, if the vehicle switches to the driving permission state or the vehicle speed is greater than a preset value while the micro-motion door is open, the fuel filler cap lock motor is locked and the oil and gas isolation valve is closed.

[0046] Furthermore, the refueling end condition is to meet any of the following conditions, including: during the refueling process: the oil and gas isolation valve or the high-pressure oil tank is diagnosed with a fault, and the micro-movement door jumps from open to closed. The fault information can also be sent to the driver through the vehicle information system to remind the driver to repair or check in time to avoid danger.

[0047] S5. The fuel filler cap lock motor is locked and the oil and gas isolation valve is closed through the engine management system.

[0048] The control method of the high-pressure fuel tank filler cap when refueling a hybrid vehicle in this embodiment also includes identifying the refueling condition of moving the vehicle. The specific scenario corresponding to this condition is: when the vehicle is ready to refuel and opens the refueling door, the refueling location needs to be changed due to external reasons. The specific process is as follows Figure 4 As shown, when it is recognized that the vehicle power jumps from the on gear to the off gear, the micro-switch door jumps from open to closed, and the closing time is greater than the preset time, the post-operation interface of the engine management system is set.

[0049] This embodiment also provides a control device for the high-pressure fuel tank filler cap when refueling a motor vehicle, the structure of which is as follows: Figure 3 As shown, it includes a refueling button, an EMS, a fuel filler cap lock motor, an oil and gas isolation valve and a fuel filler cap micro-motion door.

[0050] The refueling button is used to generate a high level to wake up the vehicle's engine control system when the vehicle power is in the off position;

[0051] The engine control system is provided with a post-operation interface. When the post-operation interface is set or reset, the engine control system is awakened or enters sleep mode. The engine control system is used to control the unlocking and locking of the fuel filler cap lock motor and the opening and closing of the oil and gas isolation valve.

[0052] The micro-motion door is used to reflect its own opening and closing status to the engine control system through the sensor, so that the engine control system can make a series of control decisions.

[0053] This embodiment also provides a control system for a high-pressure fuel tank filler cap when a hybrid vehicle is refueling. The system executes the above-mentioned control method for the high-pressure fuel tank filler cap when a hybrid vehicle is refueling.

[0054] This embodiment also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle are implemented.

[0055] Example 2

[0056] This embodiment provides another method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle. The process is as follows: Figure 2 As shown, including:

[0057] T1. Press the refueling button.

[0058] T2. Determine the vehicle power level.

[0059] If the vehicle power is in the off position, set the run interface and proceed to the next step.

[0060] If the vehicle power is in the on position, determine whether the vehicle is in the driving allowed state and whether the vehicle's electronic parking brake system is pulled up. If the vehicle is in the driving allowed state and the vehicle's electronic parking brake system is pulled up, or the vehicle is in the driving not allowed state, proceed to the next step.

[0061] If the vehicle is in the driving permission state and the vehicle's electronic parking brake system is not pulled up, the driver will be reminded through the on-board information system.

[0062] T3. Determine whether the refueling preconditions are met. The refueling preconditions are to meet the following conditions at the same time, including: the oil and gas isolation valve has not been diagnosed as a fault; the high-pressure oil tank has not been diagnosed as a fault; the pressure of the high-pressure oil tank is within a preset range. If the refueling preconditions are met, proceed to the next step.

[0063] T4. Unlock the fuel filler cap lock motor and open the oil and gas isolation valve.

[0064] T5. Determine whether the micro-movement door is open. A sensor is provided next to the micro-movement door to accurately identify its open or closed state.

[0065] If the micro-motion door is not opened after the preset time, the process jumps to step T8.

[0066] If the micro-switch door opens, go to the next step.

[0067] T6. Start refueling.

[0068] T7, determine whether the refueling end condition is met, if so, proceed to the next step. The refueling end condition is to meet any of the following conditions, including: the oil and gas isolation valve is diagnosed to have a fault; the high-pressure oil tank is diagnosed to have a fault; the micro-movement door jumps from open to closed.

[0069] If the refueling end condition is not met, it is further determined whether other refueling end conditions are met, including: when the micro-motion door is open, the vehicle switches to the driving permission state and the vehicle speed is greater than a preset value.

[0070] If other refueling end conditions are met, proceed to the next step; if other refueling end conditions are not met, determine whether the micro-motion door is closed after the preset event. If the micro-motion door is not closed after the preset time, proceed to the next step.

[0071] T8. Lock the fuel filler cap lock motor and close the oil and gas isolation valve.

[0072] T9, finish refueling.

[0073] In summary, the present invention provides a control method and system for a high-pressure fuel tank filler cap of a hybrid vehicle, which is applicable to a PHEV model of a hybrid vehicle. When the vehicle power is in the ON gear and the OFF gear, the high-pressure fuel tank cap lock motor and the oil and gas isolation valve can be controlled through the refueling button, the engine management system and the fuel tank cap micro-motion door, which can solve the problem that the engine of the hybrid vehicle does not start when using the pure electric mode, causing the oil vapor to evaporate to the outside of the vehicle.

[0074] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0075] The order of execution of each step in the above embodiment does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0076] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for controlling a high-pressure fuel tank filler cap when refueling a hybrid vehicle, characterized in that: The vehicle engine management system is provided with a post-operation interface; the method comprises: After the refueling button of the vehicle is pressed, it is determined whether the vehicle power is in the on gear or the off gear; When the vehicle power is in the off position, the vehicle's engine management system is awakened by the refueling button, the post-operation interface is set to ensure the continuous operation of the engine management system, and whether the vehicle meets the refueling preconditions; when the vehicle power is in the on position, if the vehicle is in the driving permission state and the vehicle's electronic parking brake system is pulled up, or the vehicle is in the driving non-permitted state, it is determined whether the vehicle meets the refueling preconditions; When the vehicle meets the pre-conditions for refueling, the engine management system controls the unlocking of the fuel filler cap lock motor and the opening of the oil and gas isolation valve, and identifies the open and closed status of the fuel filler inching door; When it is recognized that the micro-motion door is open, refueling starts, and the refueling is judged to be finished according to the refueling end condition. If the vehicle power is in the off gear, after it is judged that the refueling is finished, the post-operation interface is reset to stop the operation of the engine management system; The engine management system controls the locking of the fuel filler cap lock motor and the closing of the oil and gas isolation valve.

2. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 1, characterized in that: When the vehicle power is in the on gear, if the vehicle is in the driving permission state and the electronic parking brake system of the vehicle is not pulled, the information that the electronic parking brake system of the vehicle is not pulled is reminded to the driver through the vehicle information system.

3. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 1, characterized in that: The refueling precondition is to simultaneously meet the following conditions, which include: the oil-gas isolation valve has not been diagnosed as faulty; the high-pressure oil tank has not been diagnosed as faulty; and the pressure of the high-pressure oil tank is within a preset range.

4. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 1, characterized in that: If the inching door does not open within the preset time after the fuel filler cap lock motor is unlocked and the oil and gas isolation valve is opened, the fuel filler cap lock motor will be locked and the oil and gas isolation valve will be closed.

5. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 1, characterized in that: After refueling begins, if the vehicle switches to the driving permission state and the vehicle speed is greater than the preset value while the micro-switch door is open, the fuel filler cap lock motor will be locked and the oil and gas isolation valve will be closed.

6. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 5, characterized in that: After refueling begins, if the micro-sliding door is open for longer than the preset time, the fuel filler cap lock motor will be locked and the oil and gas isolation valve will be closed.

7. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 1, characterized in that: The refueling end condition is to meet any of the following conditions, which include: the oil and gas isolation valve is diagnosed with a fault; the high-pressure oil tank is diagnosed with a fault; the micro-motion door jumps from open to closed.

8. The method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to claim 6, characterized in that: During vehicle driving, when it is recognized that the inching door is continuously opened within the preset time and the vehicle power switches from the on gear to the off gear, the post-operation interface of the engine management system is set.

9. A control system for a high-pressure fuel tank filler cap when refueling a hybrid vehicle, characterized in that: The system executes the control method of the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for controlling the high-pressure fuel tank filler cap when refueling a hybrid vehicle according to any one of claims 1 to 8 are implemented.

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