Vehicle catalyst state diagnosis method and device

Abstract

The invention provides a vehicle catalytic converter state diagnosis method and device, and relates to the technical field of vehicles, the method comprises the steps that state parameters of a catalytic converter in a hybrid power vehicle are obtained, and the state parameters comprise the activation state of the catalytic converter and the oxygen storage amount of the catalytic converter; judging whether the activated state shows that the catalytic converter is activated or not, and comparing the oxygen storage amount with a preset oxygen storage threshold value; when the oxygen storage amount is larger than or equal to the oxygen storage threshold value, it is judged that the catalyst is free of faults; when the activation state shows that the catalytic converter is activated and the oxygen storage amount is smaller than the oxygen storage threshold value, it is judged that the catalytic converter breaks down, and when the accumulated heat value flowing through the catalytic converter is larger than or equal to a preset heat threshold value, the activation state shows that the catalytic converter is activated, and when the accumulated heat value flowing through the catalytic converter is larger than or equal to the preset heat threshold value, it is judged that the catalytic converter breaks down. The present invention improves the accuracy of state diagnosis of a catalyst in a hybrid vehicle.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a method and device for diagnosing a vehicle catalyst status. Background Art

[0002] With the increasingly stringent requirements on fuel consumption and emissions, and the development of vehicle electrification systems, hybrid vehicles are becoming more and more popular. Hybrid technology is a technology that takes into account both vehicle energy conservation and emission reduction and reduces driver range anxiety. Its important component for reducing emissions is the catalyst. The precious metal components in the catalyst can promote the redox reaction of pollutants in the exhaust gas with the air, decomposing them into substances such as water, oxygen and carbon dioxide.

[0003] In traditional vehicles driven by internal combustion engines, the internal combustion engine is a necessary power device for driving the vehicle. Its operating time is basically the same as the vehicle operating time, and the state of the catalyst is relatively simple. In hybrid vehicles, the power system architecture is different. It has multiple motors and internal combustion engines, and the working mode is complex. When using the traditional internal combustion engine vehicle catalyst state diagnosis method to judge the hybrid vehicle catalyst state, it is easy to misjudge the catalyst state. Summary of the invention

[0004] The problem solved by the present invention is how to improve the accuracy of status diagnosis of a catalyst in a hybrid vehicle.

[0005] In order to solve the above problems, the present invention provides a method for diagnosing the status of a vehicle catalyst, comprising:

[0006] Acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage amount of the catalyst;

[0007] determining whether the activation state indicates that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold;

[0008] When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault;

[0009] When the activation state shows that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, the catalyst is determined to be faulty, wherein when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold, the activation state shows that the catalyst is activated.

[0010] Compared with the prior art, since the working condition of the internal combustion engine of a hybrid vehicle is uncertain, the present invention sets the activation state as an identification flag, making it one of the parameters for diagnosing the state of the catalyst, so as to preliminarily determine the activation state of the catalyst; the oxygen storage capacity is used as another state parameter to measure the working performance of the catalyst and to determine the fault state of the catalyst; when the oxygen storage capacity is less than the oxygen storage threshold, it is necessary to simultaneously determine whether the state parameter of the catalyst is different from the actual state, and determine whether the catalyst is indeed in the activation state by determining the heat value flowing through the catalyst, and use the oxygen storage capacity together with the catalyst state determination condition. When the activation state shows that it is activated and the oxygen storage capacity is less than the oxygen storage threshold, the catalyst is determined to be faulty; when the oxygen storage capacity is greater than the oxygen storage threshold, the catalyst is determined to be fault-free. The above fault diagnosis method takes into account the problem of the unstable working mode of the internal combustion engine of a hybrid vehicle, and the catalyst fault state can be preliminarily determined by the activation state or the oxygen storage capacity, and the catalyst activation state can be further determined by the heat value flowing through the catalyst. Combined with the parameter of the catalyst oxygen storage capacity, the state of the catalyst is finally determined to ensure that there is no misjudgment, and it is suitable for cumulative diagnosis scenarios in multiple driving cycles.

[0011] Optionally, determining whether the activation state shows that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold value includes:

[0012] comparing the oxygen storage amount with the oxygen storage threshold;

[0013] When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault;

[0014] When the oxygen storage amount is less than the oxygen storage threshold, the activation state of the catalyst is determined, and if the activation state is displayed as activated, it is determined that the catalyst is faulty.

[0015] Optionally, determining whether the activation state shows that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold value includes:

[0016] When the activation state is displayed as inactivated, determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold;

[0017] When the accumulated heat value is less than the heat threshold, returning to the step of determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold;

[0018] When the accumulated calorific value is greater than or equal to the caloric threshold, the oxygen storage amount is compared with the oxygen storage threshold. If the oxygen storage amount is greater than or equal to the oxygen storage threshold, it is determined that the catalyst is not faulty; if the oxygen storage amount is less than the oxygen storage threshold, it is determined that the catalyst is faulty.

[0019] Optionally, the vehicle catalyst status diagnosis method further includes:

[0020] Acquiring exhaust parameters of the internal combustion engine in the hybrid vehicle, wherein the exhaust parameters include exhaust mass flow, exhaust temperature and exhaust specific heat capacity;

[0021] The accumulated heat value is obtained according to the exhaust mass flow rate, the exhaust temperature and the exhaust specific heat capacity.

[0022] Optionally, when the activation state is displayed as inactivated, after determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold, the method further includes:

[0023] If the accumulated calorific value is less than the calorific threshold, the exhaust parameters of the internal combustion engine are reacquired after a preset time period, and the calorific value is obtained according to the exhaust parameters until the accumulated calorific value is greater than or equal to the calorific threshold.

[0024] Optionally, the vehicle catalyst status diagnosis method further includes:

[0025] When the activation state shows that the catalyst is not activated and the accumulated heat value flowing through the catalyst is greater than or equal to the heat threshold, the activation state of the catalyst is changed to activated as the state parameter to be obtained next time.

[0026] Optionally, after changing the activation state of the catalyst to activated as the state parameter to be acquired next time, the method further includes:

[0027] In response to the activation state reset request, the activation state is changed to inactivated as the state parameter to be acquired next time.

[0028] In a second aspect, the present invention further provides a vehicle catalyst status diagnosis device, comprising:

[0029] An acquisition module, used for acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage capacity of the catalyst;

[0030] a determination module, configured to determine whether the activation state indicates that the catalyst is activated, and to compare the oxygen storage amount with a preset oxygen storage threshold;

[0031] A first determination module, configured to determine that the catalyst has no fault when the oxygen storage amount is greater than or equal to an oxygen storage threshold;

[0032] The second determination module is configured to determine that the catalyst is faulty when the activation state indicates that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, wherein the activation state indicates that the catalyst is activated when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold.

[0033] In a third aspect, the present invention further provides an electronic device, comprising a memory and a processor;

[0034] The memory is used to store computer programs;

[0035] The processor is used to implement the vehicle catalyst status diagnosis method as described above when executing the computer program.

[0036] In a fourth aspect, the present invention further provides a vehicle, comprising the electronic device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a process flow of a vehicle catalyst status diagnosis method according to an embodiment of the present invention;

[0038] Figure 2 is a flowchart of a method for diagnosing a vehicle catalyst status according to an embodiment of the present invention;

[0039] Figure 3 Another flowchart of a method for diagnosing a vehicle catalyst status according to an embodiment of the present invention;

[0040] Figure 4 An exemplary diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0042] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0043] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0044] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0045] like Figure 1 As shown, an embodiment of the present invention provides a method for diagnosing a vehicle catalyst status, comprising:

[0046] Step S100, obtaining state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage capacity of the catalyst.

[0047] Specifically, the catalyst is an off-board purification device installed in the vehicle exhaust system, which is generally a cylindrical structure made of double-layer stainless steel plates, and an insulating material is installed in the double-layer thin plate interlayer. A purifier is installed in the middle of the mesh partition, and the purifier includes a carrier and a catalyst. In some embodiments, the carrier is made of aluminum oxide, and its shape includes spheres, polygons and mesh partitions. The purifier catalyzes pollutants in the exhaust gas through catalytic action. It is usually made of platinum, rhodium, and palladium. The purifier is sprayed onto the carrier. When the exhaust gas passes through the catalyst, the purifier therein catalyzes and promotes the redox reaction of the pollutants, so that the vehicle exhaust gas is purified.

[0048] In one embodiment, the internal combustion engine of a hybrid vehicle is started under specific operating conditions, and its current state is related to the purification performance. State parameters for determining the state of the catalyst are reasonably selected to prevent the catalyst from being mistakenly judged as a fault state when the catalyst is not activated.

[0049] Step S200, determining whether the activation state shows that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold.

[0050] Step S300: When the oxygen storage amount is greater than or equal to the oxygen storage threshold, it is determined that the catalyst has no fault.

[0051] Specifically, the oxygen storage amount is directly related to the performance of the catalyst. When the oxygen storage amount is greater than the oxygen storage threshold, the performance of the catalyst is in a normal range. Therefore, there is no need to judge other state parameters, and the state of the catalyst can be directly determined to be a fault-free state.

[0052] Optionally, after determining that the catalyst is not faulty, the activation state of the catalyst is changed to activated.

[0053] Step S400, when the activation state shows that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, the catalyst is determined to be faulty, wherein when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold, the activation state shows that the catalyst is activated.

[0054] In one embodiment, when the oxygen storage amount is first determined, if the oxygen storage amount is less than the oxygen storage threshold, or the activation state is displayed as not activated, it means that the catalyst may be in a faulty state. In order to prevent misjudgment, it is necessary to determine whether the activation state of the catalyst is incorrect to improve the diagnostic accuracy. In this embodiment, since the catalyst mainly relies on the heat in the exhaust gas of the internal combustion engine to burn substances such as carbon and sulfur in the catalyst at high temperature, thereby activating the catalyst, in other embodiments, the catalyst also needs to rely on heat activation. Therefore, the heat value flowing through the catalyst is used to determine whether the catalyst has been activated, so as to prevent misjudgment caused by the difference between the acquired activation state and the actual activation state.

[0055] Specifically, when the oxygen storage amount is determined first, if the oxygen storage amount is less than the oxygen storage threshold, it may be because the catalyst is not activated, so the oxygen storage amount is less than the oxygen storage threshold, then the cumulative heat value flowing through the catalyst is detected or calculated to determine whether it is greater than or equal to the preset heat threshold. If it is greater than or equal to the heat threshold, it means that the catalyst should have been activated. Since the oxygen storage amount is less than the oxygen storage threshold, it means that the catalyst is already in a fault state. If the cumulative heat value flowing through the catalyst is less than the heat threshold, it means that the catalyst is not activated, and it is necessary to wait for the cumulative heat value to be greater than or equal to the heat threshold, that is, the catalyst is activated before it can be finally determined whether the catalyst is in a fault state.

[0056] When the activation status is first determined, if the activation status is not activated, it is necessary to wait until the cumulative heat value is greater than or equal to the heat threshold before the oxygen storage capacity of the catalyst can be finally determined to determine whether it is faulty; if the activation status shows activated, the cumulative heat value can still be used to determine whether the catalyst is substantially activated. If it is substantially activated, it is necessary to further determine whether the oxygen storage capacity is greater than or equal to the oxygen storage threshold. If it is greater than or equal to the oxygen storage threshold, it is determined that the catalyst is not faulty; if it is less than the oxygen storage threshold, it is determined that the catalyst is faulty.

[0057] Specifically, a preset heat threshold is used as a judgment condition to determine whether the catalyst has been activated. The heat threshold is determined by the type of catalyst, and the heat thresholds set for the same catalyst are similar or the same.

[0058] In one embodiment, due to the characteristics of hybrid vehicles, there is a situation where the number of driving cycles and the number of internal combustion engine starts are inconsistent, and the duration of each internal combustion engine start may be short. If the judgment conditions are formulated in units of driving cycles, there will be no suitable diagnostic conditions in multiple driving cycles, resulting in inaccurate diagnostic results, or the internal combustion engine is not started in multiple driving cycles, and the catalyst is not activated, which will also make the diagnostic results of the catalyst inaccurate. By determining the accumulated heat of exhaust gas entering the catalyst in different driving cycles, it is judged whether the catalyst is activated. It does not rely on the working conditions of a single driving cycle. When the number of internal combustion engine starts is small and the startup time is short, it still has reference value and has high accuracy. In the experiment, the accuracy rate of judging whether the catalyst is activated by accumulating the heat flowing through the catalyst reached more than 95%.

[0059] In one embodiment, the heat threshold required for catalyst activation is determined based on the catalyst. After the heat threshold is determined, the oxygen storage capacity of the catalyst is further determined by comparing the heat accumulation value of the exhaust gas flowing through the catalyst. After the heat accumulation value is greater than the heat threshold required for activation. The oxygen storage capacity of the catalyst is greatly different before and after activation. Before diagnosing the catalyst, determining whether the catalyst is activated can improve the accuracy of catalyst diagnosis. The oxygen storage capacity of a vehicle model before and after the catalyst is activated is shown in the following table:

[0060]

[0061] Specifically, after it is determined that the catalyst has been activated, the preset oxygen storage threshold is used to determine whether the catalyst is faulty. For example, as shown in the above table, if the vehicle VIN is 2954, after it is determined that the vehicle catalyst has been activated, when the estimated catalyst oxygen storage capacity is 550 mg, the catalyst is determined to be normal; when the estimated catalyst oxygen storage capacity is 300 mg, the catalyst is determined to be faulty.

[0062] Alternatively, if Figure 2 As shown, the determining whether the activation state shows that the catalyst is activated and comparing the oxygen storage amount with a preset oxygen storage threshold value include:

[0063] comparing the oxygen storage amount with the oxygen storage threshold;

[0064] When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault;

[0065] When the oxygen storage amount is less than the oxygen storage threshold, the activation state of the catalyst is determined, and if the activation state is displayed as activated, it is determined that the catalyst is faulty.

[0066] Alternatively, if Figure 3 As shown, the determining whether the activation state shows that the catalyst is activated and comparing the oxygen storage amount with a preset oxygen storage threshold value include:

[0067] When the activation state is displayed as inactivated, determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold;

[0068] When the accumulated heat value is less than the heat threshold, returning to the step of determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold;

[0069] When the accumulated calorific value is greater than or equal to the caloric threshold, the oxygen storage amount is compared with the oxygen storage threshold. If the oxygen storage amount is greater than or equal to the oxygen storage threshold, it is determined that the catalyst is not faulty; if the oxygen storage amount is less than the oxygen storage threshold, it is determined that the catalyst is faulty.

[0070] In one embodiment, when the state parameter of the catalyst obtained is the flag activation state, the activation state is determined. When the flag activation state is not activated, the preset condition is met, indicating that the catalyst is not activated, and the heat value flowing through the catalyst is further obtained to assist in determining whether the catalyst is activated. When the flag activation state is activated, it means that the catalyst has been activated, and the working performance of the catalyst is further obtained to confirm whether the catalyst is faulty. For example, the oxygen storage capacity of the catalyst is obtained to determine whether the catalyst has the ability to work normally.

[0071] In one embodiment, when the activation state of the state parameter of the catalyst is activated, the oxygen storage amount of the catalyst is determined, and the oxygen storage amount is compared with a preset oxygen storage threshold to determine whether the catalyst is faulty. When the oxygen storage amount is greater than or equal to the oxygen storage threshold, it is determined that the catalyst is not faulty; when the oxygen storage amount is less than the oxygen storage threshold, it is determined that the catalyst is faulty.

[0072] In one embodiment, when the acquired state parameter is the oxygen storage amount, the oxygen storage amount is compared with the oxygen storage threshold to determine whether the state of the catalyst needs to be further diagnosed. When the oxygen storage amount is less than the oxygen storage threshold, if the catalyst is activated, it can be determined that the catalyst is faulty; if the catalyst is not activated, it is necessary to further determine the working condition of the catalyst. Therefore, when the oxygen storage amount is less than the oxygen storage threshold, the activation state of the flag is acquired. When the activation state of the flag is not activated, it is necessary to further determine whether the catalyst is activated by the heat value flowing through the catalyst to prevent misjudgment.

[0073] In one embodiment, when the state parameter is the oxygen storage amount, it is first determined whether the oxygen storage amount is greater than or equal to the oxygen storage threshold. When the oxygen storage amount is greater than or equal to the oxygen storage threshold, it indicates that the catalyst has been activated. At this time, there is no need to determine the activation state of the catalyst flag, and the catalyst can be directly determined to be fault-free. In some embodiments, after determining that the catalyst is fault-free, the flag activation state is updated to activated as a state parameter for the next catalyst diagnosis. When the oxygen storage amount is less than the oxygen storage threshold, the flag activation state needs to be further determined. When the flag activation state is activated, it indicates that the catalyst has been activated, but the oxygen storage capacity is low, and the catalyst is determined to be faulty.

[0074] Optionally, the vehicle catalyst status diagnosis method further includes:

[0075] Acquiring exhaust parameters of the internal combustion engine in the hybrid vehicle, wherein the exhaust parameters include exhaust mass flow, exhaust temperature and exhaust specific heat capacity;

[0076] The accumulated heat value is obtained according to the exhaust mass flow rate, the exhaust temperature and the exhaust specific heat capacity.

[0077] In one embodiment, the heat value flowing through the catalyst is estimated and determined by the exhaust parameters of the internal combustion engine. For example, the exhaust parameters include exhaust mass flow, exhaust temperature and exhaust specific heat capacity; wherein the exhaust mass flow represents the mass of the exhaust gas discharged by the internal combustion engine, the exhaust temperature represents the temperature of the exhaust gas discharged by the internal combustion engine, and the exhaust specific heat capacity represents the specific heat capacity determined by the exhaust gas composition. Substituting the exhaust parameters into the heat formula based on the fluid can obtain the heat flowing through the catalyst, and the heat flowing through the catalyst obtained by each calculation is added to obtain the cumulative heat value, wherein the calculation formula for the heat flowing through the catalyst calculated each time is expressed as:

[0078] Q=mcΔT,

[0079] Where Q represents the calorific value, m represents the exhaust mass flow rate, and c represents the exhaust specific heat capacity. △ T represents the exhaust gas temperature.

[0080] Optionally, when the activation state is displayed as inactivated, after determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold, the method further includes:

[0081] If the accumulated calorific value is less than the calorific threshold, the exhaust parameters of the internal combustion engine are reacquired after a preset time period, and the calorific value is obtained according to the exhaust parameters until the accumulated calorific value is greater than or equal to the calorific threshold.

[0082] In one embodiment, considering some special scenarios, such as vehicles that have just left the factory, or vehicles with a small number of internal combustion engine starts and start-up time, the catalyst in the vehicle is not activated and is highly likely not to have a fault. Therefore, when the heat value flowing through the catalyst is less than the heat threshold, the catalyst is temporarily not judged as a fault state to prevent misjudgment. After a preset time period, the heat value flowing through the catalyst is recalculated until the heat value is greater than or equal to the heat threshold, and the activation state of the flag is changed to activated to further determine the oxygen storage capacity of the catalyst.

[0083] Optionally, the vehicle catalyst status diagnosis method further includes:

[0084] When the activation state shows that the catalyst is not activated and the accumulated heat value flowing through the catalyst is greater than or equal to the heat threshold, the activation state of the catalyst is changed to activated as the state parameter to be obtained next time.

[0085] In one embodiment, after the flag activation state is changed to activated, the next time the state parameters are obtained, the flag activation state will remain unchanged as activated until a signal to change the flag activation state is actively input. For example, after the catalyst is replaced, the flag activation state is changed to unactivated to reset the activation status of the catalyst until the heat flowing through the replaced catalyst exceeds the heat threshold.

[0086] Optionally, after changing the activation state of the catalyst to activated as the state parameter to be acquired next time, the method further includes:

[0087] In response to the activation state reset request, the activation state is changed to inactivated as the state parameter to be acquired next time.

[0088] Another embodiment of the present invention provides a vehicle catalyst status diagnosis device, comprising:

[0089] An acquisition module, used for acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage capacity of the catalyst;

[0090] a determination module, configured to determine whether the activation state indicates that the catalyst is activated, and to compare the oxygen storage amount with a preset oxygen storage threshold;

[0091] A first determination module, configured to determine that the catalyst has no fault when the oxygen storage amount is greater than or equal to an oxygen storage threshold;

[0092] The second determination module is configured to determine that the catalyst is faulty when the activation state indicates that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, wherein the activation state indicates that the catalyst is activated when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold.

[0093] like Figure 4 As shown, another embodiment of the present invention provides an electronic device 400, including a memory 402 and a processor 401; the memory 402 is used to store a computer program; the processor 401 is used to implement the vehicle thermal management method as described above when executing the computer program.

[0094] In other words, an electronic device 400 includes a memory 402 and a processor 401 coupled to the memory 402; the memory 402 is configured to store a computer program; and the processor 401 is configured to perform the following operations when executing the computer program:

[0095] Acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage amount of the catalyst;

[0096] determining whether the activation state indicates that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold;

[0097] When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault;

[0098] When the activation state shows that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, the catalyst is determined to be faulty, wherein when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold, the activation state shows that the catalyst is activated.

[0099] Another embodiment of the present invention provides a vehicle, comprising the electronic device 400 as described above.

[0100] Yet another embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the vehicle thermal management method as described above is implemented.

[0101] In other words, a non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor performs the following operations:

[0102] Acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage amount of the catalyst;

[0103] determining whether the activation state indicates that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold;

[0104] When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault;

[0105] When the activation state shows that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, the catalyst is determined to be faulty, wherein when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold, the activation state shows that the catalyst is activated.

[0106] An electronic device that can be used as a server or client of the present invention will now be described, which is an example of a hardware device that can be applied to various aspects of the present invention. Electronic devices are intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0107] The electronic device includes a computing unit, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) or a computer program loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for the operation of the device can also be stored. The computing unit, ROM and RAM are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus.

[0108] A computer system may include clients and servers. Clients and servers are generally remote from each other and typically interact through a communication network. The relationship of client and server arises through computer programs running on the respective computers and having a client-server relationship to each other.

[0109] A person of ordinary skill in the art can understand that the implementation of all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. In the present application, the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, which may be located in one place or distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0110] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for diagnosing a vehicle catalyst status, characterized in that: include: Acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage amount of the catalyst; determining whether the activation state indicates that the catalyst is activated, and comparing the oxygen storage amount with a preset oxygen storage threshold; When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault; When the activation state shows that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, the catalyst is determined to be faulty, wherein when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold, the activation state shows that the catalyst is activated.

2. The vehicle catalyst status diagnosis method according to claim 1, characterized in that: The determining whether the activation state indicates that the catalyst is activated and comparing the oxygen storage amount with a preset oxygen storage threshold value includes: comparing the oxygen storage amount with the oxygen storage threshold; When the oxygen storage amount is greater than or equal to the oxygen storage threshold, determining that the catalyst has no fault; When the oxygen storage amount is less than the oxygen storage threshold, the activation state of the catalyst is determined, and if the activation state is displayed as activated, it is determined that the catalyst is faulty.

3. The vehicle catalyst status diagnosis method according to claim 1, characterized in that: The determining whether the activation state indicates that the catalyst is activated and comparing the oxygen storage amount with a preset oxygen storage threshold value includes: When the activation state is displayed as inactivated, determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold; When the accumulated heat value is less than the heat threshold, returning to the step of determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold; When the accumulated calorific value is greater than or equal to the caloric threshold, the oxygen storage amount is compared with the oxygen storage threshold. If the oxygen storage amount is greater than or equal to the oxygen storage threshold, it is determined that the catalyst is not faulty; if the oxygen storage amount is less than the oxygen storage threshold, it is determined that the catalyst is faulty.

4. The vehicle catalyst status diagnosis method according to any one of claims 1 to 3, characterized in that: The vehicle catalyst status diagnosis method further includes: Acquiring exhaust parameters of the internal combustion engine in the hybrid vehicle, wherein the exhaust parameters include exhaust mass flow, exhaust temperature and exhaust specific heat capacity; The accumulated heat value is obtained according to the exhaust mass flow rate, the exhaust temperature and the exhaust specific heat capacity.

5. The vehicle catalyst status diagnosis method according to claim 4, characterized in that: After determining whether the accumulated heat value flowing through the catalyst reaches the heat threshold when the activation state is displayed as inactivated, the method further includes: If the accumulated calorific value is less than the calorific threshold, the exhaust parameters of the internal combustion engine are reacquired after a preset time period, and the calorific value is obtained according to the exhaust parameters until the accumulated calorific value is greater than or equal to the calorific threshold.

6. The vehicle catalyst status diagnosis method according to claim 1, characterized in that: The vehicle catalyst status diagnosis method further includes: When the activation state shows that the catalyst is not activated and the accumulated heat value flowing through the catalyst is greater than or equal to the heat threshold, the activation state of the catalyst is changed to activated as the state parameter to be obtained next time.

7. The vehicle catalyst status diagnosis method according to claim 6, characterized in that: After changing the activation state of the catalyst to activated as the state parameter to be acquired next time, the method further includes: In response to the activation state reset request, the activation state is changed to inactivated as the state parameter to be acquired next time.

8. A vehicle catalyst status diagnostic device, characterized in that: include: An acquisition module, used for acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters include an activation state of the catalyst and an oxygen storage capacity of the catalyst; a determination module, configured to determine whether the activation state indicates that the catalyst is activated, and to compare the oxygen storage amount with a preset oxygen storage threshold; A first determination module, configured to determine that the catalyst has no fault when the oxygen storage amount is greater than or equal to an oxygen storage threshold; The second determination module is configured to determine that the catalyst is faulty when the activation state indicates that the catalyst is activated and the oxygen storage amount is less than the oxygen storage threshold, wherein the activation state indicates that the catalyst is activated when the accumulated heat value flowing through the catalyst is greater than or equal to a preset heat threshold.

9. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the vehicle catalyst status diagnosis method as described in any one of claims 1-7 when executing the computer program.

10. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 9.

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