Vehicle fault processing method, storage medium and vehicle

Abstract

The invention provides a vehicle fault processing method, a storage medium and a vehicle, and belongs to the technical field of vehicles. According to the embodiment of the invention, under the condition that a target sensor breaks down, a vehicle is controlled to enter a target state; then under the condition that the vehicle enters the target state, specific fuel consumption corresponding to at least two engine working points of the engine is determined; and finally, based on the specific fuel consumption corresponding to the at least two engine working points, the alcohol-based fuel proportion in the mixed fuel is determined. Thus, when the target sensor breaks down, the vehicle is controlled to enter the target state, accurate recognition of the alcohol-based fuel proportion can be achieved according to the specific fuel consumption corresponding to the at least two engine working points of the engine in the target state, then safe and stable running of the vehicle is guaranteed, and the driving experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle fault handling method, a storage medium and a vehicle. Background Art

[0002] Currently, some vehicles use a blended fuel consisting of ethanol and gasoline to improve energy efficiency and reduce emissions. In order to achieve precise control of engine torque, vehicles are usually equipped with an ethanol sensor to detect the ethanol ratio of the blended fuel.

[0003] However, when the ethanol sensor fails, the vehicle will not be able to drive normally due to the inability to know the ethanol ratio of the mixed fuel, which will affect the user's driving safety and driving experience. Summary of the invention

[0004] The present application provides a vehicle fault handling method, a storage medium and a vehicle to solve the current problem that the vehicle cannot run normally when an ethanol sensor fails.

[0005] In order to solve the above problems, this application adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a vehicle fault processing method, the method comprising:

[0007] In the event of a target sensor failure, the vehicle is controlled to enter a target state; wherein the target sensor is used to detect the alcohol-based fuel ratio in the mixed fuel; in the target state, the engine drives the first motor to generate electricity;

[0008] When the vehicle enters the target state, determining the specific fuel consumption corresponding to at least two engine operating points of the engine;

[0009] The proportion of the alcohol-based fuel in the mixed fuel is determined based on the specific fuel consumptions corresponding to the at least two engine operating points.

[0010] In an embodiment of the present application, when the target sensor fails, controlling the vehicle to enter a target state includes:

[0011] In the event that the target sensor fails, determining whether the vehicle meets a state entry condition;

[0012] In a case where it is determined that the vehicle satisfies the state entry condition, the vehicle is controlled to enter the target state.

[0013] In an embodiment of the present application, determining whether the vehicle meets the state entry condition includes:

[0014] Acquiring operating information of the engine;

[0015] When the operating information satisfies the fuel consumption condition, obtaining the operating condition information of the vehicle;

[0016] Based on the operating condition information, determine whether the vehicle meets the state entry condition.

[0017] In one embodiment of the present application, the operation information includes engine operation time; the engine operation time is the time counted after the fuel filler cap of the vehicle is opened;

[0018] The method further comprises:

[0019] When the engine operation time is greater than a time threshold, it is determined that the operation information satisfies the fuel consumption condition.

[0020] In one embodiment of the present application, the operating condition information includes the current slope and the vehicle torque requirement;

[0021] Determining whether the vehicle meets the state entry condition based on the operating condition information includes:

[0022] When the current slope is less than a slope threshold and the vehicle torque demand is less than a torque threshold, it is determined that the vehicle meets the state entry condition; wherein the torque threshold is less than the maximum output torque of the second motor.

[0023] In an embodiment of the present application, the method further includes:

[0024] When the torque converter of the vehicle is in an engaged state, determining the slope threshold to be a first slope threshold, and determining the torque threshold to be a first torque threshold;

[0025] When the torque converter of the vehicle is in a non-engaged state, determining the slope threshold to be a second slope threshold, and determining the torque threshold to be a second torque threshold;

[0026] The second gradient threshold is greater than the first gradient threshold, and the second torque threshold is greater than the first torque threshold.

[0027] In one embodiment of the present application, determining the specific fuel consumption corresponding to at least two engine operating points of the engine includes:

[0028] determining an engine torque of the engine based on the power generation torque of the first motor;

[0029] Acquire at least two engine speeds, and determine the at least two engine operating points and the output power and fuel supply amount corresponding to each of the at least two engine operating points based on the engine torque and the at least two engine speeds;

[0030] Based on the output power and the fuel supply amount respectively corresponding to the at least two engine operating points, the specific fuel consumption respectively corresponding to the at least two engine operating points is determined.

[0031] In one embodiment of the present application, determining the proportion of the alcohol-based fuel in the mixed fuel based on the specific fuel consumption corresponding to each of the at least two engine operating points includes:

[0032] Acquire a plurality of specific fuel consumption distribution diagrams; different specific fuel consumption distribution diagrams represent the corresponding relationship between the engine operating point and the specific fuel consumption under different alcohol-based fuel ratios;

[0033] Determining the confidence level of the specific fuel consumption corresponding to each of the at least two engine operating points in the multiple specific fuel consumption distribution maps;

[0034] The alcohol-based fuel ratio corresponding to the specific fuel consumption distribution diagram with the highest confidence is determined as the alcohol-based fuel ratio of the mixed fuel.

[0035] In a second aspect, based on the same inventive concept, an embodiment of the present application provides a vehicle fault handling device, the device comprising:

[0036] A state control module, used to control the vehicle to enter a target state when a target sensor fails; wherein the target sensor is used to detect the alcohol-based fuel ratio in the mixed fuel; in the target state, the engine drives the first motor to generate electricity;

[0037] a specific fuel consumption determination module, configured to determine the specific fuel consumption corresponding to each of at least two engine operating points of the engine when the vehicle enters the target state;

[0038] The ratio determination module is used to determine the ratio of the alcohol-based fuel in the mixed fuel based on the specific fuel consumption corresponding to each of the at least two engine operating points.

[0039] In one embodiment of the present application, the state control module includes:

[0040] a condition determination submodule, for determining whether the vehicle satisfies a state entry condition when the target sensor fails;

[0041] The state control submodule is used to control the vehicle to enter the target state when it is determined that the vehicle meets the state entry condition.

[0042] In an embodiment of the present application, the condition determination submodule includes:

[0043] An operating information acquisition unit, used to acquire operating information of the engine;

[0044] An operating condition information acquisition unit, used to acquire the operating condition information of the vehicle when the operating information meets the fuel consumption condition;

[0045] A condition determination unit is used to determine whether the vehicle meets the state entry condition based on the operating condition information.

[0046] In one embodiment of the present application, the operation information includes the engine operation time; the engine operation time is the time counted after the fuel filler cap of the vehicle is opened; the vehicle fault handling device also includes:

[0047] The fuel consumption condition determination module is used to determine that the operation information meets the fuel consumption condition when the engine operation time is greater than a time threshold.

[0048] In one embodiment of the present application, the operating condition information includes the current slope and the vehicle torque requirement; the condition determination unit includes:

[0049] The condition determination subunit is used to determine that the vehicle meets the state entry condition when the current slope is less than the slope threshold and the vehicle torque demand is less than the torque threshold; wherein the torque threshold is less than the maximum output torque of the second motor.

[0050] In one embodiment of the present application, the vehicle fault handling device further includes:

[0051] a first threshold determination module, configured to determine, when the torque converter of the vehicle is in an engaged state, the slope threshold as a first slope threshold and the torque threshold as a first torque threshold;

[0052] The second threshold determination module is used to determine the slope threshold as a second slope threshold and determine the torque threshold as a second torque threshold when the torque converter of the vehicle is in a non-engaged state; wherein the second slope threshold is greater than the first slope threshold, and the second torque threshold is greater than the first torque threshold.

[0053] In one embodiment of the present application, the specific fuel consumption determination module includes:

[0054] an engine torque determination submodule, configured to determine an engine torque of the engine based on the power generation torque of the first motor;

[0055] a parameter determination submodule, configured to obtain at least two engine speeds, and determine the at least two engine operating points and the output power and fuel supply amount corresponding to each of the at least two engine operating points based on the engine torque and the at least two engine speeds;

[0056] The specific fuel consumption determination submodule is used to determine the specific fuel consumption corresponding to each of the at least two engine operating points based on the output power and the fuel supply amount corresponding to each of the at least two engine operating points.

[0057] In an embodiment of the present application, the ratio determination module includes:

[0058] A distribution map acquisition submodule is used to acquire a plurality of specific fuel consumption distribution maps; different specific fuel consumption distribution maps represent the corresponding relationship between the engine operating point and the specific fuel consumption under different alcohol-based fuel ratios;

[0059] A confidence determination submodule, used to determine the confidence of the specific fuel consumption corresponding to each of the at least two engine operating points in the multiple specific fuel consumption distribution maps;

[0060] The proportion determination submodule is used to determine the alcohol-based fuel proportion corresponding to the specific fuel consumption distribution diagram with the highest confidence as the alcohol-based fuel proportion of the mixed fuel.

[0061] In the third aspect, based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium on which an executable program is stored. When the executable program is executed by a processor, the vehicle fault handling method proposed in the first aspect of the present application is implemented.

[0062] In a fourth aspect, based on the same inventive concept, an embodiment of the present application provides a vehicle, including:

[0063] A memory for storing an executable program;

[0064] processor;

[0065] When the executable program is executed by the processor, the vehicle fault handling method proposed in the first aspect of the present application is implemented.

[0066] Compared with the prior art, this application has the following advantages:

[0067] A vehicle fault handling method provided in an embodiment of the present application first controls the vehicle to enter a target state when a target sensor fails; then, when the vehicle enters the target state, determines the specific fuel consumption corresponding to at least two engine operating points of the engine; and finally, determines the proportion of alcohol-based fuel in the mixed fuel based on the specific fuel consumption corresponding to at least two engine operating points. By controlling the vehicle to enter a target state when a target sensor fails, an embodiment of the present application can accurately identify the proportion of alcohol-based fuel based on the specific fuel consumption corresponding to at least two engine operating points of the engine in the target state, thereby ensuring safe and stable driving of the vehicle and improving the user's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only 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.

[0069] Figure 1 This is a flowchart of a vehicle fault handling method in one embodiment of the present application;

[0070] Figure 2 is a schematic diagram of the architecture of a vehicle power system in one embodiment of the present application;

[0071] Figure 3 is a specific fuel consumption distribution diagram of alcohol 10 fuel in one embodiment of the present application;

[0072] Figure 4 is a specific fuel consumption distribution diagram of alcohol 30 fuel in one embodiment of the present application;

[0073] Figure 5 This is a functional module diagram of a vehicle fault handling device in one embodiment of the present application;

[0074] Figure 6 It is a structural schematic diagram of a vehicle in one embodiment of the present application. DETAILED DESCRIPTION

[0075] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] It should be noted that with the continuous consumption of oil resources, more and more car companies have begun to use mixed fuels including ethanol gasoline. Ethanol gasoline can be configured with different mixing ratios according to demand, such as E10 (containing 10% ethanol and 90% gasoline), E15, E20, etc.

[0077] For mixed fuels, different ethanol ratios have different energy densities and different torques generated by combustion. Therefore, in order to achieve precise control of engine torque, vehicles are usually equipped with ethanol sensors to detect the ethanol ratio of mixed fuels.

[0078] However, when the ethanol sensor fails, the vehicle will not be able to accurately control the torque because it cannot know the ethanol ratio of the mixed fuel, which may cause the vehicle to be unable to drive normally or even break down, thus affecting the user's driving safety and driving experience.

[0079] In response to the current problem that the vehicle cannot drive normally when the ethanol sensor fails, the present application aims to provide a vehicle fault handling method. By controlling the vehicle to enter a target state when the target sensor fails, the proportion of alcohol-based fuel can be accurately identified based on the specific fuel consumption corresponding to at least two engine operating points of the engine in the target state, thereby ensuring the safe and stable driving of the vehicle and improving the user's driving experience.

[0080] Reference Figure 1 , shows a vehicle fault processing method of the present application, which may include the following steps:

[0081] S101: When a target sensor fails, the vehicle is controlled to enter a target state.

[0082] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, or an electronic device with the above functions such as a driving computer, a vehicle-mounted computer, etc., such as an ECU (Electronic Control Unit), an HCU (Hybrid Control Unit), etc. In this embodiment, the HCU will be used as the execution subject for description.

[0083] In this embodiment, the target sensor is used to detect the alcohol-based fuel ratio in the mixed fuel, wherein the alcohol-based fuel can be any one of methanol, ethanol, propanol or butanol.

[0084] Specifically, when the vehicle is powered on, the target sensor will monitor the alcohol-based fuel ratio in the mixed fuel in real time, and send a detection signal containing the alcohol-based fuel ratio to the HCU, so that the HCU can control the engine torque based on the alcohol-based fuel ratio when the engine is running.

[0085] In this embodiment, if a sensor failure occurs in the target sensor, such as voltage over limit, current over limit, resistance over limit, capacitor burnout, circuit short circuit, circuit open circuit, etc., the corresponding sensor fault information will be sent to the HCU. The HCU responds to the sensor fault information, determines that the target sensor has a fault, and then controls the vehicle to enter the target state.

[0086] In this embodiment, when the vehicle is in the target state, the HCU will control the engine to drive the first motor to generate electricity. In other words, the engine will no longer drive the vehicle, but will drive the first motor to charge the high-voltage battery. It should be noted that if the HCU detects that the user has a power demand, it will control the second motor to drive the vehicle to meet the vehicle's driving needs.

[0087] In this embodiment, refer to Figure 2 , shows a schematic diagram of the architecture of a vehicle power system in an embodiment of the present application. The engine is connected to the gearbox through the first clutch, the first motor, the second clutch, and the torque converter in sequence, and the second motor is connected to the gearbox through the third clutch and the torque converter in sequence.

[0088] In this embodiment, by controlling the first clutch, the second clutch and the third clutch, three driving modes of the vehicle can be realized, namely, single motor drive, dual motor drive and hybrid drive. Specifically, the HCU can control the first clutch and the third clutch to open and the second clutch to close, so that the first motor drives the vehicle alone; the HCU can also control the first clutch and the second clutch to open and the third clutch to close, so that the second motor drives the vehicle alone; the HCU can also control the first clutch to open and the second clutch and the third clutch to close, so that the first motor and the second motor drive the vehicle together; the HCU can also control the first clutch, the second clutch and the third clutch to close, so that the engine, the first motor and the second motor drive the vehicle together.

[0089] In this embodiment, the second motor and the third clutch can also be arranged on the rear axle of the vehicle, and the second motor is connected through the third clutch, the rear axle torque converter and the rear axle gearbox in sequence. In this way, by controlling the third clutch to close, the second motor can transmit power to the rear axle gearbox through the rear axle torque converter alone to drive the rear axle of the vehicle; the front axle of the vehicle is powered by the engine and the first motor.

[0090] Based on the above architecture, the HCU can control the vehicle to enter a target state by controlling the first clutch to close and the second clutch and the third clutch to open when the vehicle is stationary. At this time, the engine drives the first motor to generate electricity and the second motor stops; the HCU can control the vehicle to enter a target state by controlling the first clutch and the third clutch to close and the second clutch to open when the vehicle is driving. At this time, the engine drives the first motor to generate electricity and the second motor drives the vehicle alone.

[0091] S102: When the vehicle enters the target state, determine the specific fuel consumption corresponding to at least two engine operating points of the engine.

[0092] In this embodiment, after determining that the vehicle enters the target state, the HCU will calculate the specific fuel consumption of the engine at different engine operating points. Different engine operating points correspond to different engine torques and / or different engine speeds.

[0093] In a specific implementation, the HCU can control the first motor to generate fixed torque electricity so that the engine torque of the engine remains unchanged. By obtaining different engine speeds under the engine torque, at least two engine operating points can be obtained, and the specific fuel consumption corresponding to each engine operating point can be calculated.

[0094] In this embodiment, the specific fuel consumption represents the fuel consumption rate, which refers to the mass (in g) of the mixed fuel consumed within 1 hour for every 1 kW of effective power generated by the engine, and is represented by ge, with the unit being g / (kw.h). It should be understood that the lower the specific fuel consumption, the better the economy of the vehicle.

[0095] It should be noted that, since the engine does not participate in driving the vehicle in the target state, that is, the engine speed and vehicle speed are in a decoupled state, changes in the engine operating point will not cause changes in the vehicle's driving state, thereby effectively avoiding affecting the normal driving of the vehicle.

[0096] S103: Determine the proportion of the alcohol-based fuel in the mixed fuel based on the specific fuel consumption corresponding to at least two engine operating points.

[0097] In the present embodiment, due to different alcohol-based fuel ratios, the mixed fuel has different energy densities, and the torque and specific fuel consumption generated are different; at the same time, considering that under the same alcohol-based fuel ratio, there may be two different engine operating points with the same specific fuel consumption. Therefore, by calculating the specific fuel consumption corresponding to at least two engine operating points, the corresponding alcohol-based fuel ratio can be matched, thereby achieving effective identification of the alcohol-based fuel ratio. It should be understood that the more engine operating points there are, the more accurate the alcohol-based fuel ratio identified.

[0098] In this embodiment, by controlling the vehicle to enter the target state when a target sensor fails, the proportion of alcohol-based fuel can be accurately identified based on the specific fuel consumption corresponding to at least two engine operating points of the engine in the target state, thereby ensuring safe and stable driving of the vehicle and improving the user's driving experience.

[0099] In a feasible implementation, S101 may specifically include the following sub-steps:

[0100] S101 - 1 : In the event that a target sensor fails, determine whether the vehicle meets a state entry condition.

[0101] In this embodiment, considering that the engine cannot drive the vehicle in the target state, after determining that the target sensor has failed, the HCU will first determine whether the vehicle meets the state entry conditions instead of directly controlling the vehicle to enter the target state, thereby effectively avoiding the situation where the vehicle directly enters the target state and affects the normal driving of the vehicle.

[0102] S101 - 2: When it is determined that the vehicle meets the state entry condition, control the vehicle to enter the target state.

[0103] In this embodiment, if the HCU detects that the vehicle meets the state entry conditions, it means that controlling the vehicle to enter the target state will not affect the normal driving of the vehicle, and then controlling the vehicle to enter the target state and identifying the proportion of alcohol-based fuel in the mixed fuel.

[0104] It should be noted that if the HCU detects that the vehicle does not meet the state entry conditions, it will not control the vehicle to enter the target state until the vehicle meets the state entry conditions, and then control the vehicle to enter the target state.

[0105] In this embodiment, by determining the state entry condition, it is possible to ensure that after the vehicle enters the target state, the alcohol-based fuel ratio can be effectively identified without affecting the normal driving of the vehicle.

[0106] In a specific implementation, the step of determining whether the vehicle meets the state entry condition in S101-1 may specifically include the following sub-steps:

[0107] S101-1-1: Obtain engine operating information.

[0108] In this embodiment, in order to ensure the accuracy of identifying the alcohol-based fuel ratio, the HCU will first obtain the operating information of the engine and determine whether the operating information meets the fuel consumption condition.

[0109] It should be noted that the fuel consumption condition is used to determine whether the engine has consumed the residual fuel; the residual fuel refers to the mixed fuel added last time remaining in the fuel supply line. Specifically, after the vehicle performs a fuel addition operation, the alcohol-based fuel ratio of the mixed fuel in the fuel tank may change. At this time, the alcohol-based fuel ratio of the mixed fuel in the fuel tank will be different from the alcohol-based fuel ratio of the residual fuel remaining in the fuel supply line. Therefore, if the residual fuel is not eliminated, it may affect the accuracy of the recognition of the alcohol-based fuel ratio.

[0110] S101-1-2: When the operating information meets the fuel consumption conditions, obtain the vehicle's operating condition information.

[0111] In this embodiment, if the HCU detects that the operating information meets the fuel consumption condition, it means that the residual fuel in the fuel supply pipeline has been consumed. At this time, the state entry condition will be further identified based on the vehicle's operating condition information.

[0112] In a specific implementation, the operation information includes the engine operation time, which is the time counted after the fuel filler cap of the vehicle is opened. That is, after the HCU detects that the fuel filler cap is opened, it will reset the engine operation time, and after detecting that the engine enters the running state again, it will trigger the timing of the engine operation time.

[0113] In this embodiment, if the HCU detects that the engine operation time is greater than the time threshold, it determines that the operation information meets the fuel consumption condition.

[0114] In this embodiment, since the residual fuel remaining in the fuel supply pipeline will be consumed first when the engine is running, by setting the time threshold, it can be ensured that the residual fuel can be consumed by the engine before the alcohol-based fuel ratio is identified, thereby ensuring the accuracy of the identification of the alcohol-based fuel ratio.

[0115] In one example, the duration threshold is set to 90 seconds. After the vehicle's fuel filler cap is opened, no matter whether the fuel filler cap is closed or not, as long as the engine starts running, the timing of the engine running time is triggered. When the engine running time reaches 60 seconds, the target sensor fails. At this time, the state entry condition will not be judged. Instead, the system will wait until the engine running time is greater than 90 seconds, determine that the residual fuel in the fuel supply line has been consumed by the engine, and then judge the state entry condition. If it is further judged that the vehicle meets the state entry condition, the vehicle is controlled to enter the target state.

[0116] S101-1-3: Based on the operating condition information, determine whether the vehicle meets the state entry conditions.

[0117] In this embodiment, the HCU can effectively identify whether the second motor can replace the engine and the first motor to stably drive the vehicle by judging the state entry conditions based on the operating condition information, and then ensure the stable driving of the vehicle after the vehicle enters the target state.

[0118] In a specific implementation, the operating condition information may specifically include the current slope and the vehicle torque demand. The HCU determines that the vehicle meets the state entry condition when the current slope is less than the slope threshold and the vehicle torque demand is less than the torque threshold. The torque threshold is less than the maximum output torque of the second motor.

[0119] In this embodiment, if the current slope is less than the slope threshold, it means that the vehicle is traveling on a road with a smaller slope. At this time, the vehicle's required torque is usually smaller and more stable, thereby effectively avoiding the large slope causing the vehicle to remain stable in the target state.

[0120] In this embodiment, if the torque demand of the whole vehicle is less than the torque threshold, it means that the vehicle can travel under the sole drive of the second motor, thereby ensuring that the vehicle can stably maintain the target state.

[0121] In a specific implementation, the product of the maximum output torque of the second motor and the torque ratio may be determined as the torque threshold, wherein the torque ratio is a value less than 1, for example, may be set to 0.85.

[0122] In this embodiment, by comprehensively judging the state entry conditions in terms of slope dimension and vehicle torque demand dimension, the vehicle can be stably maintained in the target state while ensuring normal driving of the vehicle, thereby ensuring that the alcohol-based fuel ratio can be effectively identified.

[0123] In a feasible implementation manner, the vehicle fault handling method may further include the following steps:

[0124] S201: When the torque converter of the vehicle is in an engaged state, the gradient threshold is determined to be a first gradient threshold, and the torque threshold is determined to be a first torque threshold.

[0125] It should be noted that the torque converter is a hydraulic element mainly composed of a pump wheel, a turbine, a guide wheel and a locking clutch, and uses hydraulic oil as the working medium. Among them, the pump wheel is connected to the power source of the vehicle, the turbine is connected to the transmission, and the working state of the locking clutch includes two states: a coupled state and a non-coupled state (i.e., an open state). Specifically, when the locking clutch is in a non-coupled state, the turbine and the pump wheel are powered by hydraulic oil, which can reduce the dynamic load of the transmission system, ensure the smooth start of the vehicle, and increase the power of the vehicle through the speed difference between the pump wheel and the turbine, which can effectively improve the power performance of the vehicle. Therefore, it is suitable for scenarios where the vehicle starts or travels at low speeds; when the locking clutch is in a coupled state, the pump wheel and the turbine are rigidly connected, and the pump wheel can directly transfer power to the turbine instead of through hydraulic oil, which can reduce energy loss. Therefore, it is suitable for scenarios where the vehicle travels at high speeds.

[0126] In this embodiment, the HCU can control the state of the torque converter based on the current vehicle speed. Specifically, when the current vehicle speed is less than or equal to the vehicle speed threshold, the torque converter can be controlled to be in a non-engaged state; when the current vehicle speed is greater than the vehicle speed threshold, the torque converter can be controlled to be in an engaged state. The vehicle speed threshold can be set to 30km / h.

[0127] In this embodiment, if the HCU detects that the vehicle's torque converter is in an engaged state, it means that the pump wheel and the turbine are rigidly connected, and the pump wheel can directly transmit power to the turbine. Compared with the torque converter being in an unengaged state, the vehicle's power is relatively weaker at this time, and the slope threshold is determined to be the first slope threshold, and the torque threshold is determined to be the first torque threshold.

[0128] S202: When the torque converter of the vehicle is in a non-engaged state, the gradient threshold is determined to be a second gradient threshold, and the torque threshold is determined to be a second torque threshold.

[0129] In this embodiment, if the HCU detects that the vehicle's torque converter is in a non-engaged state, it means that power is transmitted between the turbine and the pump wheel by hydraulic oil. Compared with the torque converter being in the engaged state, the vehicle's power is relatively stronger at this time, and the slope threshold is determined to be the second slope threshold, and the torque threshold is determined to be the second torque threshold.

[0130] It should be noted that the second slope threshold is greater than the first slope threshold, and the second torque threshold is greater than the first torque threshold. For example, when the first slope threshold is set to 4%, the second slope threshold can be set to 8%; when the first torque threshold is set to 65% of the maximum output torque of the second motor, the second torque threshold is set to 85% of the maximum output torque of the second motor.

[0131] In this embodiment, by identifying the state of the torque converter, the corresponding slope threshold and torque threshold can be matched according to the state of the torque converter, and thus the state entry condition can be accurately judged under different torque converter states.

[0132] In a feasible implementation, S102 may specifically include the following sub-steps:

[0133] S102 - 1 : Determine the engine torque of the engine based on the power generation torque of the first motor.

[0134] In this embodiment, since the first motor is in a power generation state, its power generation torque is a negative value. At this time, the absolute value of the power generation torque of the first motor can be directly determined as the engine torque of the engine. In this way, by controlling the fixed torque power generation of the first motor, not only can the relative stability of the engine torque be maintained, the alcohol-based fuel ratio can be identified, but also the engine torque can be indirectly obtained to determine the engine operating point.

[0135] S102-2: Obtain at least two engine speeds, and based on the engine torque and the at least two engine speeds, determine at least two engine operating points and the output power and fuel supply amount corresponding to each of the at least two engine operating points.

[0136] In this embodiment, considering that the engine speed may fluctuate to a certain extent when the engine torque remains unchanged during operation, the HCU can obtain at least two engine operating points by acquiring at least two engine speeds. It should be noted that the engine operating point represents a set of engine torque and engine speed. Different engine operating points correspond to different engine torques and / or different engine speeds.

[0137] In this embodiment, for any engine operating point, the output power corresponding to the engine operating point can be calculated based on the engine torque and engine speed of the engine operating point; then, when the engine operates at the engine operating point, the fuel supply amount corresponding to the engine operating point can be calculated based on the fuel supply flow and fuel supply duration feedback from the injection controller.

[0138] S102-3: Determine the specific fuel consumption corresponding to at least two engine operating points based on the output power and the fuel supply amount corresponding to at least two engine operating points.

[0139] In this embodiment, after calculating the output power and fuel supply amount corresponding to each engine operating point, the HCU can calculate the specific fuel consumption of each engine operating point based on the ratio between the output power and the fuel supply amount.

[0140] In this embodiment, by controlling the engine to drive the first motor to generate electricity when a target sensor fails, the output torque of the engine can be indirectly obtained based on the power generation torque of the first motor, and then combined with the engine speed information, accurate calculation of the specific fuel consumption of each engine operating point can be achieved.

[0141] In a feasible implementation, S103 may specifically include the following sub-steps:

[0142] S103-1: Obtain multiple specific fuel consumption distribution maps.

[0143] In this embodiment, different specific fuel consumption distribution diagrams represent the corresponding relationship between the engine operating point and the specific fuel consumption under different alcohol-based fuel proportions.

[0144] Reference Figure 3 , shows the specific fuel consumption distribution diagram of alcohol 10 (containing 10% ethanol and 90% gasoline) fuel, refer to Figure 4, shows the specific fuel consumption distribution diagram of alcohol 30 (containing 30% ethanol and 70% gasoline) fuel. Among them, the unit of engine torque is N·M (Newton·meter), and the unit of engine speed is rpm (revolutions per minute). It can be seen that different ethanol ratios will cause mixed fuels to have different energy densities, and thus the same engine operating point can correspond to different specific fuel consumptions. Taking engine operating point A1 as an example, the specific fuel consumption corresponding to engine operating point A1 in alcohol 10 fuel is less than 195 (g / (kw.h)), while the specific fuel consumption corresponding to alcohol 30 fuel is greater than 205 (g / (kw.h)).

[0145] S103-2: Determine the confidence level of the specific fuel consumption corresponding to at least two engine operating points in a plurality of specific fuel consumption distribution maps.

[0146] It should be noted that if the alcohol-based fuel ratio of the mixed fuel is closer to the alcohol-based fuel ratio corresponding to a certain specific fuel consumption distribution diagram, the specific fuel consumption corresponding to each of the at least two engine operating points will be closer to the specific fuel consumption corresponding to the same engine operating point in the specific fuel consumption distribution diagram.

[0147] Continue to refer to Figure 3 and Figure 4 , if the specific fuel consumption of the engine operating points A1, A2 and A3 are calculated to be 210 (g / (kw.h)), 220 (g / (kw.h)) and 230 (g / (kw.h)) respectively, then the distribution law of the specific fuel consumption is obviously more consistent with Figure 4 The specific fuel consumption distribution law of the corresponding alcohol 30 fuel is Figure 3 The corresponding specific fuel consumption distribution pattern of alcohol 10 fuel is contradictory.

[0148] In a specific implementation, the HCU can, for any specific fuel consumption distribution map, first determine the reference specific fuel consumption of the at least two engine operating points in the specific fuel consumption distribution map; then determine the distance between the specific fuel consumption corresponding to each of the at least two engine operating points and the reference specific fuel consumption; finally, based on the distance between the specific fuel consumption corresponding to each of the at least two engine operating points and the reference specific fuel consumption, determine the confidence level of the specific fuel consumption corresponding to each of the at least two engine operating points in multiple specific fuel consumption distribution maps.

[0149] It should be noted that the smaller the distance between the specific fuel consumption of the engine operating point and the reference specific fuel consumption in the specific fuel consumption distribution diagram, the closer the alcohol-based fuel ratio is to the alcohol-based fuel ratio corresponding to the fuel consumption distribution diagram, that is, the higher the confidence of the specific fuel consumption distribution diagram.

[0150] S103-3: Determine the alcohol-based fuel ratio corresponding to the specific fuel consumption distribution diagram with the highest confidence as the alcohol-based fuel ratio of the mixed fuel.

[0151] In this embodiment, after calculating the confidence of each specific fuel consumption distribution map, the HCU can determine the alcohol-based fuel ratio corresponding to the specific fuel consumption distribution map with the highest confidence as the alcohol-based fuel ratio of the mixed fuel.

[0152] In this embodiment, the number of specific fuel consumption distribution maps can be set according to the actual accuracy requirement of the alcohol-based fuel ratio. For example, when the accuracy requirement is 2%, multiple specific fuel consumption distribution maps including 2%, 4%, ... 98% can be set according to a gradient of 2%; for example, when the accuracy requirement is 5%, multiple specific fuel consumption distribution maps including 5%, 10%, ... 95% can be set according to a gradient of 5%.

[0153] In this embodiment, by calculating the confidence of the specific fuel consumption corresponding to at least two engine operating points in a plurality of specific fuel consumption distribution maps, accurate identification of the alcohol-based fuel ratio can be achieved.

[0154] In this embodiment, after determining the proportion of alcohol-based fuel in the mixed fuel, the HCU can accurately respond to the user's power demand based on the proportion of alcohol-based fuel, achieve precise control of the engine torque, avoid vehicle jerking or insufficient power, and effectively ensure the vehicle's driving safety and the user's driving experience.

[0155] In the second aspect, based on the same inventive concept, refer to Figure 5 The embodiment of the present application provides a vehicle fault processing device 500, and the vehicle fault processing device 500 includes:

[0156] The state control module 501 is used to control the vehicle to enter a target state when a target sensor fails; wherein the target sensor is used to detect the alcohol-based fuel ratio in the mixed fuel; in the target state, the engine drives the first motor to generate electricity;

[0157] A specific fuel consumption determination module 502, for determining the specific fuel consumption corresponding to at least two engine operating points of the engine when the vehicle enters the target state;

[0158] The ratio determination module 503 is used to determine the ratio of the alcohol-based fuel in the mixed fuel based on the specific fuel consumption corresponding to at least two engine operating points.

[0159] In one embodiment of the present application, the state control module 501 includes:

[0160] A condition determination submodule, used to determine whether the vehicle meets the state entry condition in the event of a target sensor failure;

[0161] The state control submodule is used to control the vehicle to enter the target state when it is determined that the vehicle meets the state entry conditions.

[0162] In one embodiment of the present application, the condition determination submodule includes:

[0163] An operation information acquisition unit, used to acquire the operation information of the engine;

[0164] An operating condition information acquisition unit, used to acquire the operating condition information of the vehicle when the operating information meets the fuel consumption condition;

[0165] The condition determination unit is used to determine whether the vehicle meets the state entry condition based on the operating condition information.

[0166] In one embodiment of the present application, the operation information includes the engine operation time; the engine operation time is the time counted after the fuel filler cap of the vehicle is opened; the vehicle fault handling device 500 also includes:

[0167] The fuel consumption condition determination module is used to determine that the operation information meets the fuel consumption condition when the engine operation time is greater than a time threshold.

[0168] In one embodiment of the present application, the operating condition information includes the current slope and the vehicle torque requirement; the condition determination unit includes:

[0169] The condition determination subunit is used to determine whether the vehicle meets the state entry condition when the current slope is less than the slope threshold and the vehicle torque demand is less than the torque threshold; wherein the torque threshold is less than the maximum output torque of the second motor.

[0170] In one embodiment of the present application, the vehicle fault handling device 500 further includes:

[0171] a first threshold determination module, configured to determine, when the torque converter of the vehicle is in an engaged state, the slope threshold to be a first slope threshold, and determine the torque threshold to be a first torque threshold;

[0172] The second threshold determination module is used to determine the slope threshold as a second slope threshold and the torque threshold as a second torque threshold when the vehicle's torque converter is in a non-engaged state; wherein the second slope threshold is greater than the first slope threshold, and the second torque threshold is greater than the first torque threshold.

[0173] In one embodiment of the present application, the specific fuel consumption determination module 502 includes:

[0174] an engine torque determination submodule, configured to determine an engine torque of the engine based on the power generation torque of the first motor;

[0175] a parameter determination submodule, for obtaining at least two engine speeds, and determining at least two engine operating points and output power and fuel supply corresponding to each of the at least two engine operating points based on the engine torque and the at least two engine speeds;

[0176] The specific fuel consumption determination submodule is used to determine the specific fuel consumption corresponding to at least two engine operating points based on the output power and fuel supply amount corresponding to the at least two engine operating points.

[0177] In an embodiment of the present application, the ratio determination module 503 includes:

[0178] A distribution map acquisition submodule is used to acquire multiple specific fuel consumption distribution maps; different specific fuel consumption distribution maps represent the corresponding relationship between the engine operating point and the specific fuel consumption under different alcohol-based fuel ratios;

[0179] A confidence determination submodule, used to determine the confidence of the specific fuel consumption corresponding to each of at least two engine operating points in a plurality of specific fuel consumption distribution maps;

[0180] The proportion determination submodule is used to determine the alcohol-based fuel proportion corresponding to the specific fuel consumption distribution diagram with the highest confidence as the alcohol-based fuel proportion of the mixed fuel.

[0181] It should be noted that the specific implementation of the vehicle fault handling device 300 in the embodiment of the present application refers to the specific implementation of the vehicle fault handling method proposed in the first aspect of the embodiment of the present application, and will not be repeated here.

[0182] On the third aspect, based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium on which an executable program is stored. When the executable program is executed by a processor, the vehicle fault handling method proposed in the first aspect of the present application is implemented.

[0183] It should be noted that the specific implementation of the computer-readable storage medium of the embodiment of the present application refers to the specific implementation of the vehicle fault handling method proposed in the first aspect of the embodiment of the present application, and will not be repeated here.

[0184] Fourthly, refer to Figure 6 Based on the same inventive concept, the embodiment of the present application provides a vehicle 600, including:

[0185] Memory 601, used for storing executable programs;

[0186] Processor 602;

[0187] When the executable program is executed by the processor 602, the vehicle fault handling method proposed in the first aspect of the present application is implemented.

[0188] It should be noted that the specific implementation of the vehicle 600 in the embodiment of the present application refers to the specific implementation of the vehicle fault handling method proposed in the first aspect of the embodiment of the present application, and will not be repeated here.

[0189] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0190] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0191] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0192] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0193] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0194] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0195] The vehicle fault handling method, storage medium and vehicle provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A vehicle fault handling method, characterized in that: The method comprises: In the event of a target sensor failure, the vehicle is controlled to enter a target state; wherein the target sensor is used to detect the alcohol-based fuel ratio in the mixed fuel; in the target state, the engine drives the first motor to generate electricity; When the vehicle enters the target state, determining the specific fuel consumption corresponding to at least two engine operating points of the engine; The proportion of the alcohol-based fuel in the mixed fuel is determined based on the specific fuel consumptions corresponding to the at least two engine operating points.

2. The vehicle fault handling method according to claim 1, characterized in that: In the event that the target sensor fails, controlling the vehicle to enter a target state includes: In the event that the target sensor fails, determining whether the vehicle meets a state entry condition; In a case where it is determined that the vehicle satisfies the state entry condition, the vehicle is controlled to enter the target state.

3. The vehicle fault handling method according to claim 2, characterized in that: Determining whether the vehicle meets a state entry condition includes: Acquiring operating information of the engine; When the operating information satisfies the fuel consumption condition, obtaining the operating condition information of the vehicle; Based on the operating condition information, determine whether the vehicle meets the state entry condition.

4. The vehicle fault handling method according to claim 3, characterized in that: The operation information includes the engine operation time; the engine operation time is the time counted after the fuel filler cap of the vehicle is opened; The method further comprises: When the engine operation time is greater than a time threshold, it is determined that the operation information satisfies the fuel consumption condition.

5. The vehicle fault handling method according to claim 3, characterized in that: The working condition information includes the current slope and the vehicle torque requirement; Determining whether the vehicle meets the state entry condition based on the operating condition information includes: When the current slope is less than a slope threshold and the vehicle torque demand is less than a torque threshold, it is determined that the vehicle meets the state entry condition; wherein the torque threshold is less than the maximum output torque of the second motor.

6. The vehicle fault handling method according to claim 5, characterized in that: The method further comprises: When the torque converter of the vehicle is in an engaged state, determining the slope threshold to be a first slope threshold, and determining the torque threshold to be a first torque threshold; When the torque converter of the vehicle is in a non-engaged state, determining the slope threshold to be a second slope threshold, and determining the torque threshold to be a second torque threshold; The second gradient threshold is greater than the first gradient threshold, and the second torque threshold is greater than the first torque threshold.

7. The vehicle fault handling method according to claim 1, characterized in that: Determining the specific fuel consumption corresponding to at least two engine operating points of the engine, respectively, comprises: determining an engine torque of the engine based on the power generation torque of the first motor; Acquire at least two engine speeds, and determine the at least two engine operating points and the output power and fuel supply amount corresponding to each of the at least two engine operating points based on the engine torque and the at least two engine speeds; Based on the output power and the fuel supply amount respectively corresponding to the at least two engine operating points, the specific fuel consumption respectively corresponding to the at least two engine operating points is determined.

8. The vehicle fault handling method according to claim 1, characterized in that: Determining the proportion of the alcohol-based fuel in the mixed fuel based on the specific fuel consumption corresponding to each of the at least two engine operating points includes: Acquire a plurality of specific fuel consumption distribution diagrams; different specific fuel consumption distribution diagrams represent the corresponding relationship between the engine operating point and the specific fuel consumption under different alcohol-based fuel ratios; Determining the confidence level of the specific fuel consumption corresponding to each of the at least two engine operating points in the multiple specific fuel consumption distribution maps; The alcohol-based fuel ratio corresponding to the specific fuel consumption distribution diagram with the highest confidence is determined as the alcohol-based fuel ratio of the mixed fuel.

9. A computer-readable storage medium having an executable program stored thereon, characterized in that: When the executable program is executed by the processor, the vehicle fault handling method according to any one of claims 1 to 8 is implemented.

10. A vehicle, characterized in that: include: A memory for storing an executable program; processor; When the executable program is executed by the processor, the vehicle fault handling method according to any one of claims 1 to 8 is implemented.

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