Hybrid power vehicle OBD diagnosis method and device and vehicle

Abstract

The invention discloses a hybrid power vehicle OBD diagnosis method and device and a vehicle, and the method comprises the steps: obtaining real-time operation parameters of OBD related parts, so as to recognize OBD related faults; carrying out confirmation processing on the OBD related faults according to a preset bit and a clearing condition to obtain a fault processing flag bit, a pending fault flag bit, a confirmation fault flag bit, a permanent fault flag bit and an MIL lamp lightening request flag bit; storing the pending fault flag bit, the confirmed fault flag bit and the permanent fault flag bit; performing fault processing control according to the fault processing flag bit and a preset fault processing requirement; and the MIL lamp is controlled according to the MIL lamp lightening request flag bit, the OBD diagnosis full function of the hybrid electric vehicle is achieved, the existing emission requirement is met, and the method is suitable for the hybrid electric vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular to an OBD diagnostic method, a device and a vehicle for a hybrid vehicle. Background Art

[0002] Pollution from automobile emissions has attracted more and more attention from the world. At present, various emission regulations are becoming more and more stringent. The OBD (On-Bard Diagnostic) system came into being. With the continuous improvement of the degree of vehicle electrification, hybrid vehicles have added high-voltage components such as high-voltage batteries and motors compared to traditional vehicles. The electrical and electronic control systems are more complex, and the requirements for OBD diagnostic methods are higher. In view of the different hybrid configurations, network architectures and control schemes, the existing traditional OBD diagnostic related technologies can no longer be directly borrowed in hybrid vehicles. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a hybrid vehicle OBD diagnostic method, which realizes the full function of hybrid vehicle OBD diagnostics, meets the existing emission requirements and is suitable for hybrid vehicles.

[0004] A hybrid vehicle OBD diagnostic method according to a first aspect of an embodiment of the present invention includes: Obtain real-time operating parameters of OBD-related components; Comparing the real-time operating parameters with preset operating parameters to identify OBD-related faults; Confirm and process the OBD-related fault according to the preset position and clearing condition, and obtain the fault processing flag, pending fault flag, confirmed fault flag, permanent fault flag, and MIL light lighting request flag; Storing the pending fault flag, the confirmed fault flag, and the permanent fault flag; Performing fault handling control according to the fault handling flag bit and preset fault handling requirements; The MIL lamp is controlled according to the MIL lamp lighting request flag.

[0005] The hybrid vehicle OBD diagnostic method according to the embodiment of the present invention has at least the following beneficial effects: The present invention compares the real-time operating parameters of OBD-related components with preset operating parameters to identify OBD-related faults, confirms and processes the OBD-related faults according to preset positions and clearing conditions to obtain a fault processing flag, a pending fault flag, a confirmed fault flag, a permanent fault flag, and a MIL lamp lighting request flag, stores the pending fault flag, the confirmed fault flag, and the permanent fault flag, performs fault processing control according to preset fault processing requirements according to the fault processing flag, controls the MIL lamp according to the MIL lamp lighting request flag, realizes the full OBD diagnosis function of hybrid vehicles, meets existing emission requirements, and is suitable for hybrid vehicles.

[0006] According to some embodiments of the present invention, the confirming process of the OBD-related fault according to the preset bit and the clearing condition includes: Set the pending fault flag for each fault; If the fault continues to be received in the next driving cycle, the pending fault flag of the fault will continue to be set; If the fault is not received in the next driving cycle, the pending fault flag of the fault is cleared.

[0007] According to some embodiments of the present invention, the confirming process of the OBD-related fault according to the preset bit and the clearing condition includes: Setting a confirmation fault flag for a fault that causes the vehicle power system to enter a limp home mode that affects emissions or OBD system performance; For water pump, fan body fault and control pin circuit fault, the confirmation fault flag is not set first, and the confirmation fault flag of the fault is set when the fault is received in the next driving cycle.

[0008] According to some embodiments of the present invention, the confirming process of the OBD-related fault according to the preset bit and the clearing condition includes: The warm-up cycle information of the engine is obtained, and if the same fault as the previously confirmed fault is not detected in a first preset number of warm-up cycles, the corresponding confirmed fault flag is cleared.

[0009] According to some embodiments of the present invention, the confirming process of the OBD-related fault according to the preset bit and the clearing condition includes: When the confirmed fault flag of the fault is set, the permanent fault flag of the fault is set at the end of the driving cycle. If the fault is not detected after a second preset number of consecutive driving cycle diagnoses, the permanent fault flag of the fault is cleared.

[0010] According to some embodiments of the present invention, the confirming and processing of the OBD-related fault according to the preset bit and the clearing condition further includes: When the confirmation fault flag is set, the MIL light lighting request flag is set; When there is no confirmed fault flag bit and no permanent fault flag bit is set, the MIL lamp lighting request flag bit is cleared.

[0011] According to some embodiments of the present invention, the storing of the pending fault flag bit, the confirmed fault flag bit, and the permanent fault flag bit includes: When the pending fault flag is set, the pending fault is stored within a preset time, and when the pending fault flag is cleared, the corresponding fault is cleared; When the confirmation fault flag is set, the confirmation fault is stored within a preset time, and when the confirmation fault flag is cleared, the corresponding fault is cleared; When the permanent fault flag is set, the permanent fault is immediately stored, and when the permanent fault flag is cleared, the corresponding fault is cleared.

[0012] According to a second aspect of an embodiment of the present invention, a hybrid vehicle OBD diagnostic device comprises: A fault identification module is used to obtain real-time operating parameters of OBD-related components; compare the real-time operating parameters with preset operating parameters to identify OBD-related faults; A fault confirmation module is used to confirm and process the OBD-related fault according to the preset position and clearing conditions, and obtain a fault processing flag, a pending fault flag, a confirmed fault flag, a permanent fault flag, and a MIL light lighting request flag; A fault processing module, used to perform fault processing control according to the fault processing flag bit and preset fault processing requirements; A fault storage module, used for storing the pending fault flag, the confirmed fault flag, and the permanent fault flag; The MIL lamp lighting module is used to control the MIL lamp according to the MIL lamp lighting request flag.

[0013] A vehicle according to a third aspect of an embodiment of the present invention comprises the hybrid vehicle OBD diagnostic device.

[0014] According to a fourth aspect of an embodiment of the present invention, a computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the hybrid vehicle OBD diagnostic method.

[0015] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of the hybrid vehicle power system structure of the present invention; Figure 2 is a schematic diagram of a hybrid power system control scheme of the present invention; Figure 3 A schematic diagram of the hybrid power system OBD architecture of the present invention; Figure 4 A flow chart of the steps of the hybrid vehicle OBD diagnostic method of the present invention; Figure 5 It is a schematic diagram of the hybrid vehicle OBD diagnostic device of the present invention. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0022] Existing hybrid OBD diagnosis-related technologies either focus on the design of OBD diagnostic devices without involving control methods; or focus on maintaining OBD diagnostic conditions on the basis of ensuring vehicle power; or focus on accurately identifying the effective cycle of hybrid vehicles. In view of the different hybrid configurations, network architectures and control schemes, the previous OBD diagnostic devices and control methods can no longer be directly borrowed, and it is necessary to establish a complete set of hybrid vehicle OBD diagnostic methods and devices.

[0023] like Figure 1 As shown, the embodiment of the present invention is directed to a hybrid vehicle power system structure, which includes an engine 100, a generator 200, a drive motor 300, a power battery 400, a clutch 500, and a reduction gear 600. The drive motor 300 is connected to the power battery 400 through a drive motor inverter 320, and the generator 200 is connected to the power battery 400 through a generator inverter 220. The engine 100 and the generator 200 are linked by a gear pair, and the engine 100 can be started by the generator 200. When the clutch 500 is disconnected, the engine 100 does not participate in directly driving the vehicle, but the engine 100 drives the generator 200 to generate electricity to provide energy for the battery or the drive motor 300, and the drive motor 300 drives the vehicle to travel. When the clutch 500 is engaged, the torque of the engine 100 is transmitted to the wheel end 700 through the clutch 500 and the reduction gear 600, and the engine 100 can drive the hybrid vehicle together with the drive motor 300. In addition, each assembly of the dual-motor hybrid is monitored and adjusted by a dedicated controller, such as the drive motor 300 is controlled by the drive motor control unit 310, the generator 200 is controlled by the generator control unit 210, the power battery 400 is controlled by the battery management system 410, and the engine 100 is controlled by the engine management system 110. Each assembly controller monitors and identifies its own fault status in real time, and sends it to the vehicle control unit 800 through the CAN line. The vehicle control unit 800 identifies the driver's operation, receives relevant component information and fault information sent by the controllers such as the engine 100, the drive motor 300, the generator 200, and the battery, identifies the clutch 500 and its own status and faults, sends control instructions to the relevant controllers, coordinates and controls all components to operate in an orderly manner, realizes functions such as hybrid drive and brake energy recovery, and ensures that the vehicle operates safely and reliably according to the driver's needs in the event of a fault. The hybrid working modes of the hybrid vehicle power system structure mainly include: (1) parking and shutdown, the dual-motor hybrid vehicle is in a parking state, the engine 100 is in a shutdown state, the clutch 500 is in a disengaged state, and the vehicle control unit 800 stops sending injection commands and related torque commands; (2) pure electric mode, when the battery power is sufficient, the vehicle speed and the driver's required torque are small, the engine 100 is shut down, and the vehicle is driven by the drive motor 300 for driving and regenerative braking; (3) series mode, when the vehicle speed increases or the driver's required torque is large, the engine 100 is shut down. The generator 200 generates electricity and together with the power battery 400, it serves as the energy source for the drive motor 300, or provides power to the drive motor 300 and charges the power battery 400 at the same time; (4) Parallel mode: when the vehicle speed continues to increase and the driver's required torque decreases, the clutch 500 is controlled to engage, and the engine 100 directly drives the vehicle. The generator 200 generates electricity according to the power of the power battery 400 and the load of the engine 100. When the driver's required torque is greater than the upper limit of the economic zone of the engine 100 or the engine 100 responds slowly, the drive motor 300 assists.

[0024] like Figure 2 The hybrid power system control scheme for the embodiment of the present invention shown in the figure, the vehicle control unit 800 is the brain of the hybrid vehicle, it identifies the states of the accelerator pedal, brake pedal, gear, clutch, etc., receives the relevant component information and vehicle speed signals sent by the engine management system 110, the drive motor control unit 310, the generator control unit 210, the battery management system 410 and other controllers through the CAN line, calculates the driver's required torque, and sends control instructions to the relevant controllers through the CAN line, coordinates and controls all power components (engine, clutch, drive motor, generator, power battery) to operate in an orderly manner, and realizes the functions of hybrid power drive and brake energy recovery. In addition, the vehicle controller is responsible for the control of the hybrid vehicle thermal management system, identifies the water temperature according to the water temperature sensor, and controls the fan and water pump to work according to the established strategy to ensure the reasonable working temperature of the engine, drive motor, generator, and power battery.

[0025] like Figure 3The hybrid system OBD architecture targeted by the embodiment of the present invention is shown. Since the engine management system 110 monitors far more indicators related to engine emissions than hybrid-specific components, in order to save network resources, the engine management system 110 is selected as the main OBD controller, the vehicle control unit 800 and the body electronic stability control system are used as the first-level OBD controller, and the drive motor control unit 310, the generator control unit 210, and the battery management system 410 are used as the second-level OBD controller. The engine management system 110, the vehicle control unit 800, and the body electronic stability control system can all communicate with the diagnostic tool. The vehicle control unit 800 and the body electronic stability control system support some diagnostic services according to the needs of data interaction. The engine management system 110 is responsible for realizing all diagnostic services and arbitration of the MIL status. The drive motor control unit 310, the generator control unit 210, and the battery management system 410 serve as secondary OBD controllers of the vehicle control unit 800. They do not need to directly interact with the diagnostic tool or support OBD diagnostic services. They only need to have the function of OBD fault identification and send relevant information to the vehicle control unit 800 through the CAN bus. The vehicle control unit 800 implements hybrid-related OBD fault management and diagnostic tool communication functions. The hybrid system OBD architecture solution decomposes the vehicle OBD function into each primary controller for implementation. The secondary controller does not need to support OBD diagnostic services, which reduces the requirements for each controller and greatly reduces development costs.

[0026] The OBD diagnostic functions of the engine management system 110 and the vehicle electronic stability control system are the same as those of conventional vehicles and are not the focus of the invention. The hybrid vehicle OBD diagnostic device of the present invention is mainly arranged in the vehicle control unit 800, and the OBD diagnostic method provided is also for the vehicle control unit 800.

[0027] like Figure 4 As shown, the hybrid vehicle OBD diagnostic method of the embodiment of the present invention includes but is not limited to the following steps: Step S100: obtaining real-time operating parameters of OBD-related components; Step S200: comparing the real-time operating parameters with the preset operating parameters to identify OBD-related faults; Step S300: confirm and process the OBD-related faults according to the preset bits and clearing conditions, and obtain the fault processing flag bit, pending fault flag bit, confirmed fault flag bit, permanent fault flag bit, and MIL light lighting request flag bit; Step S400: storing the pending fault flag, the confirmed fault flag, and the permanent fault flag; Step S500: performing fault handling control according to the fault handling flag bit and the preset fault handling requirement; Step S600: Control the MIL light according to the MIL light lighting request flag.

[0028] The present invention compares the real-time operating parameters of OBD-related components with preset operating parameters to identify OBD-related faults, confirms and processes the OBD-related faults according to preset positions and clearing conditions to obtain a fault processing flag, a pending fault flag, a confirmed fault flag, a permanent fault flag, and a MIL lamp lighting request flag, stores the pending fault flag, the confirmed fault flag, and the permanent fault flag, performs fault processing control according to preset fault processing requirements according to the fault processing flag, controls the MIL lamp according to the MIL lamp lighting request flag, realizes the full OBD diagnosis function of hybrid vehicles, meets existing emission requirements, and is suitable for hybrid vehicles.

[0029] In step S100, according to the hybrid power system control scheme, the real-time operating parameters of the OBD-related components include but are not limited to the operating parameters of the accelerator pedal, the operating parameters of the brake pedal, the operating parameters of the proportional pressure valve, the operating parameters of the vehicle control unit 800, the communication parameters with the drive motor control unit 310, the generator control unit 210 and the battery management system 410, the operating parameters of the water pump, the operating parameters of the fan, the operating parameters of the control pins, etc.

[0030] Furthermore, in step S200, OBD-related faults include mainly but are not limited to accelerator pedal fault (sensor power supply voltage exceeds upper limit, sensor power supply voltage exceeds lower limit, sensor voltage exceeds upper limit, sensor voltage exceeds lower limit), brake pedal fault (brake pedal difference fault, brake failure fault), proportional pressure valve fault (proportional pressure valve control pin is short-circuited to electricity, short-circuited to ground, open circuit), vehicle control unit 800 itself fault (overtemperature, power supply fault), communication fault with drive motor control unit 310, generator control unit 210 and battery management system 410, water pump body fault, fan body fault and control pin circuit fault, etc. In addition, OBD faults related to the motor system and battery system are also included.

[0031] It is understandable that OBD-related faults are identified by detecting the real-time operating parameters of OBD-related components and comparing them with preset operating parameters. The preset operating parameters are set according to different working conditions and vehicle models. OBD-related faults cause hybrid vehicles to limp home or affect the cooling system function.

[0032] Since the identified OBD-related faults will cause the hybrid vehicle to perform limp control or affect the cooling system function, in step S300, the fault processing flag is confirmed, and the preset bits and clearing conditions are not set. It can be understood that when an OBD-related fault is identified, the fault processing flag is directly generated.

[0033] Regarding the confirmation of pending fault flags, after an OBD-related fault is identified, the pending fault flag of each fault is first set. If the fault continues to be received in the next driving cycle, the pending fault flag of the fault continues to be set. If the fault is not received in the next driving cycle, the pending fault flag of the fault is cleared.

[0034] Regarding the confirmation of the fault flag, for faults in the accelerator pedal, brake pedal, proportional pressure valve, vehicle control unit 800 itself, motor system, battery system, and communication failures with the drive motor control unit 310, generator control unit 210, and battery management system 410, all of which will cause the power system to enter a limp home mode that can affect emissions or OBD system performance. Furthermore, after identifying OBD-related faults, the confirmation fault flag of the fault that causes the vehicle power system to enter a limp home mode that affects emissions or OBD system performance is also set, synchronized with the pending fault flag of the fault.

[0035] For water pump, fan body fault and control pin circuit fault, the confirmation fault flag is not set first, and the confirmation fault flag of the fault is set when the fault is received in the next driving cycle.

[0036] And in the process of confirming the fault flag, the engine warm-up cycle information is obtained. If the same fault as the previously confirmed fault is not detected in the first preset number of warm-up cycles, the corresponding confirmed fault flag is cleared. It can be understood that if the same fault as the previously confirmed fault is not detected in 40 warm-up cycles, the corresponding confirmed fault flag is cleared at the end of the 41st warm-up cycle.

[0037] Regarding the confirmation of the permanent fault flag, when the confirmation fault flag of the fault has been set, the permanent fault flag of the fault is set at the end of the driving cycle. If the existence of the fault is not detected after a second preset number of continuous driving cycle diagnoses, the permanent fault flag of the fault is cleared.

[0038] Regarding the confirmation of the MIL light lighting request flag, when there is a confirmed fault flag bit, the MIL light lighting request flag bit is set; when there is no confirmed fault flag bit and no permanent fault flag bit is set, the MIL light lighting request flag bit is cleared.

[0039] In step S400, when the pending fault flag is set, the pending fault is stored within a preset time, and when the pending fault flag is cleared, the corresponding fault is cleared; when the confirmed fault flag is set, the confirmed fault is stored within a preset time, and when the confirmed fault flag is cleared, the corresponding fault is cleared; when the permanent fault flag is set, the permanent fault is immediately stored, and when the permanent fault flag is cleared, the corresponding fault is cleared.

[0040] The preset time is set to 10s, and other times can be set in other embodiments.

[0041] In step S500, limp home control or cooling system redundancy control is performed according to the fault handling flag and the established fault handling requirement.

[0042] like Figure 5 As shown, the present invention also provides a hybrid vehicle OBD diagnostic device, including: a fault identification module, a fault confirmation module, a fault processing module, a fault storage module and a MIL light lighting module, the fault identification module is used to obtain real-time operating parameters of OBD related components, and compare the real-time operating parameters with preset operating parameters to identify OBD related faults; the fault confirmation module is used to confirm and process OBD related faults according to preset positions and clearing conditions, and obtain a fault processing flag bit, a pending fault flag bit, a confirmed fault flag bit, a permanent fault flag bit, and a MIL light lighting request flag bit; the fault processing module is used to control fault processing according to preset fault processing requirements based on the fault processing flag bit; the fault storage module is used to store the pending fault flag bit, the confirmed fault flag bit, and the permanent fault flag bit; the MIL light lighting module is used to control the MIL light according to the MIL light lighting request flag bit.

[0043] The fault confirmation module is mainly responsible for confirming the fault and then giving it to the fault processing module, fault storage module and MIL lamp lighting module. The MIL lamp lighting module completes the lighting and extinguishing of the MIL lamp according to the MIL lamp lighting request signal.

[0044] The present invention can effectively link fault processing, fault storage and fault reminder through the setting of the fault confirmation module, solve the problem of asynchronous functions, and thus realize the full OBD diagnosis function of hybrid vehicle.

[0045] The present invention also provides a vehicle, which includes the hybrid vehicle OBD diagnostic device. It can be understood that the contents of the above-mentioned hybrid vehicle OBD diagnostic device embodiment are all applicable to the present vehicle embodiment, the functions specifically implemented by the present vehicle embodiment are the same as those in the hybrid vehicle OBD diagnostic device embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned hybrid vehicle OBD diagnostic device embodiment.

[0046] A computer-readable storage medium according to an embodiment of the present invention stores a computer program, which implements the above hybrid vehicle OBD diagnostic method when executed by a processor.

[0047] The computer-readable storage medium of the embodiment of the present invention may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, but is not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In an embodiment of the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device.

[0048] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0049] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0050] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A hybrid vehicle OBD diagnostic method, characterized in that: include: Obtain real-time operating parameters of OBD-related components; Comparing the real-time operating parameters with preset operating parameters to identify OBD-related faults; Confirm and process the OBD-related fault according to the preset position and clearing condition, and obtain the fault processing flag, pending fault flag, confirmed fault flag, permanent fault flag, and MIL light lighting request flag; Storing the pending fault flag, the confirmed fault flag, and the permanent fault flag; Performing fault handling control according to the fault handling flag bit and preset fault handling requirements; The MIL lamp is controlled according to the MIL lamp lighting request flag.

2. The hybrid vehicle OBD diagnostic method according to claim 1, characterized in that: The confirming and processing of the OBD-related fault according to the preset position and the clearing condition includes: Set the pending fault flag for each fault; If the fault continues to be received in the next driving cycle, the pending fault flag of the fault will continue to be set; If the fault is not received in the next driving cycle, the pending fault flag of the fault is cleared.

3. The hybrid vehicle OBD diagnostic method according to claim 1, characterized in that: The confirming and processing of the OBD-related fault according to the preset position and the clearing condition includes: Setting a confirmation fault flag for a fault that causes the vehicle power system to enter a limp home mode that affects emissions or OBD system performance; For water pump, fan body fault and control pin circuit fault, the confirmation fault flag is not set first, and the confirmation fault flag of the fault is set when the fault is received in the next driving cycle.

4. The hybrid vehicle OBD diagnostic method according to claim 3, characterized in that: The confirming and processing of the OBD-related fault according to the preset position and the clearing condition includes: The warm-up cycle information of the engine is obtained, and if the same fault as the previously confirmed fault is not detected in a first preset number of warm-up cycles, the corresponding confirmed fault flag is cleared.

5. The hybrid vehicle OBD diagnostic method according to claim 1, characterized in that: The confirming and processing of the OBD-related fault according to the preset position and the clearing condition includes: When the confirmed fault flag of the fault is set, the permanent fault flag of the fault is set at the end of the driving cycle. If the fault is not detected after a second preset number of consecutive driving cycle diagnoses, the permanent fault flag of the fault is cleared.

6. The hybrid vehicle OBD diagnostic method according to claim 1, characterized in that: The confirming and processing of the OBD-related fault according to the preset position and the clearing condition also includes: When the confirmation fault flag is set, the MIL light lighting request flag is set; When there is no confirmed fault flag bit and no permanent fault flag bit is set, the MIL lamp lighting request flag bit is cleared.

7. The hybrid vehicle OBD diagnostic method according to claim 1, characterized in that: The storing of the pending fault flag, the confirmed fault flag, and the permanent fault flag includes: When the pending fault flag is set, the pending fault is stored within a preset time, and when the pending fault flag is cleared, the corresponding fault is cleared; When the confirmation fault flag is set, the confirmation fault is stored within a preset time, and when the confirmation fault flag is cleared, the corresponding fault is cleared; When the permanent fault flag is set, the permanent fault is immediately stored, and when the permanent fault flag is cleared, the corresponding fault is cleared.

8. A hybrid vehicle OBD diagnostic device, characterized in that: include: Fault identification module, used to obtain real-time operating parameters of OBD-related components; Comparing the real-time operating parameters with preset operating parameters to identify OBD-related faults; A fault confirmation module is used to confirm and process the OBD-related fault according to the preset position and clearing conditions, and obtain a fault processing flag, a pending fault flag, a confirmed fault flag, a permanent fault flag, and a MIL light lighting request flag; A fault processing module, used to perform fault processing control according to the fault processing flag bit and preset fault processing requirements; A fault storage module, used for storing the pending fault flag, the confirmed fault flag, and the permanent fault flag; The MIL lamp lighting module is used to control the MIL lamp according to the MIL lamp lighting request flag.

9. A vehicle, characterized in that: It includes the hybrid vehicle OBD diagnostic device as claimed in claim 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the hybrid vehicle OBD diagnostic method according to any one of claims 1 to 7.

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