A vehicle catalytic converter state diagnosis method and device

Abstract

The application provides a vehicle catalyst state diagnosis method and device, and relates to the technical field of vehicles.The method comprises the following steps: acquiring state parameters of a catalyst in a hybrid vehicle, wherein the state parameters comprise an activation state of the catalyst and an oxygen storage amount of the catalyst; judging whether the activation state shows that the catalyst has been activated, and comparing the oxygen storage amount with a preset oxygen storage threshold value; when the oxygen storage amount is greater than or equal to the oxygen storage threshold value, determining that the catalyst is fault-free; when the activation state shows that the catalyst has been activated and the oxygen storage amount is less than the oxygen storage threshold value, determining that the catalyst is faulty; and when the cumulative heat value flowing through the catalyst is greater than or equal to a preset heat threshold value, the activation state shows that the catalyst has been activated, thereby improving the accuracy of state diagnosis of the catalyst in the hybrid vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle catalyst state diagnosis method and device. BACKGROUND

[0002] With the increasingly stringent requirements for 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 vehicle energy saving and emission reduction and reduces driver range anxiety, and the important part of reducing emissions is the catalyst. The noble metal components in the catalyst can promote the oxidation-reduction reaction of pollutants in the exhaust gas with air, decomposing into water, oxygen and carbon dioxide and other substances.

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

[0004] The problem solved by the present application is how to improve the accuracy of diagnosing the state of the catalyst in a hybrid vehicle.

[0005] To solve the above problems, the present application provides a vehicle catalyst state diagnosis method, comprising:

[0006] obtaining a state parameter of a catalyst in a hybrid vehicle, wherein the state parameter includes an activation state of the catalyst and an oxygen storage amount of the catalyst;

[0007] judging whether the activation state shows that the catalyst has been activated, and comparing the oxygen storage amount with a preset oxygen storage threshold value;

[0008] when the oxygen storage amount is greater than or equal to the oxygen storage threshold value, it is determined that the catalyst is not faulty;

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

[0010] With respect to the prior art, since the working condition of the internal combustion engine of the hybrid vehicle has uncertainty, the present application sets the activation state as an identification flag, uses it as one of the parameters for catalyst state diagnosis to preliminarily determine the activation state of the catalyst; uses the oxygen storage amount as another state parameter to measure the working performance of the catalyst and determine the fault state of the catalyst; when the oxygen storage amount is less than the oxygen storage threshold value, it is necessary to determine whether the state parameter of the catalyst is different from the actual state, and determine whether the catalyst is actually in the activated state by determining the heat value flowing through the catalyst, and use the oxygen storage amount together as the state determination condition of the catalyst; when the activation state shows that it has been activated and the oxygen storage amount is less than the oxygen storage threshold value, it is determined that the catalyst is faulty; when the oxygen storage amount is greater than the oxygen storage threshold value, it is determined that the catalyst is not faulty. The above fault diagnosis method considers the problem of unstable working mode of the internal combustion engine of the hybrid vehicle, can preliminarily determine the fault state of the catalyst through the activation state or the oxygen storage amount, further determine the activation state of the catalyst through the heat value flowing through the catalyst, and finally determine the state of the catalyst by combining the oxygen storage amount, so as to ensure that there is no misjudgment and is suitable for cumulative diagnosis scene in multiple driving cycles.

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

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

[0013] when the oxygen storage amount is greater than or equal to the oxygen storage threshold value, determining that the catalyst is not faulty;

[0014] when the oxygen storage amount is less than the oxygen storage threshold value, determining the activation state of the catalyst, and if the activation state shows that it has been activated, determining that the catalyst is faulty.

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

[0016] when the activation state shows that it has not been activated, determining whether the cumulative heat value flowing through the catalyst reaches the heat threshold value;

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

[0018] when the cumulative heat value is greater than or equal to the heat threshold value, comparing the oxygen storage amount with the oxygen storage threshold value, if the oxygen storage amount is greater than or equal to the oxygen storage threshold value, determining that the catalyst is not faulty, and if the oxygen storage amount is less than the oxygen storage threshold value, determining that the catalyst is faulty.

[0019] Optionally, the vehicle catalyst state diagnosis method further comprises:

[0020] acquiring an exhaust parameter of an internal combustion engine in the hybrid vehicle, wherein the exhaust parameter comprises an exhaust mass flow, an exhaust temperature and an exhaust specific heat capacity;

[0021] obtaining the cumulative heat value according to the exhaust mass flow, the exhaust temperature and the exhaust specific heat capacity.

[0022] Optionally, after the determining whether the cumulative heat value flowing through the catalyst reaches the heat threshold value when the activation state shows that the catalyst is not activated, the method further comprises:

[0023] if the cumulative heat value is less than the heat threshold value, re-acquiring the exhaust parameter of the internal combustion engine after a preset time period, and obtaining the heat value according to the exhaust parameter until the cumulative heat value is greater than or equal to the heat threshold value.

[0024] Optionally, the vehicle catalyst state diagnosis method further comprises:

[0025] when the activation state shows that the catalyst is not activated and the cumulative heat value flowing through the catalyst is greater than or equal to the heat threshold value, changing the activation state of the catalyst to activated as the state parameter acquired next time.

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

[0027] in response to an activation state reset request, changing the activation state to not activated as the state parameter acquired next time.

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

[0029] an acquisition module, configured to acquire a state parameter of a catalyst in a hybrid vehicle, wherein the state parameter comprises an activation state of the catalyst and an oxygen storage amount of the catalyst;

[0030] a judgment module, configured to judge whether the activation state shows that the catalyst is activated and compare the oxygen storage amount with a preset oxygen storage threshold value;

[0031] a first determination module, configured to determine that the catalyst is fault-free when the oxygen storage amount is greater than or equal to the oxygen storage threshold value.

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

[0033] In a third aspect, the present application provides an electronic device comprising a memory and a processor.

[0034] The memory is configured to store a computer program.

[0035] The processor is configured to implement the vehicle catalytic converter state diagnosis method as described above when executing the computer program.

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

[0037] Figure 1 FIG. 1 is a flowchart of a vehicle catalytic converter state diagnosis method according to an embodiment of the present application;

[0038] Figure 2 FIG. 1 is a flowchart of a vehicle catalytic converter state diagnosis method according to an embodiment of the present application;

[0039] Figure 3 FIG. 1 is a flowchart of a vehicle catalytic converter state diagnosis method according to an embodiment of the present application;

[0040] Figure 4 FIG. 1 is a flowchart of a vehicle catalytic converter state diagnosis method according to an embodiment of the present application; DETAILED DESCRIPTION

[0041] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments set forth herein, but rather, these embodiments are provided to make the present application more thorough and complete. It should be understood that the drawings and embodiments of the present application are for exemplary purposes only, and are not intended to limit the scope of protection of the present application.

[0042] It should be understood that each step described in the method embodiments of the present application can be performed in different orders and / or in parallel. In addition, the method embodiments can include additional steps and / or omit the steps shown. The scope of the present application 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 "at least partially based 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". The 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 "multiple" mentioned in the present invention are illustrative rather than restrictive. 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 the status of a vehicle catalyst, comprising:

[0046] Step S100 : 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.

[0047] Specifically, the catalyst is an off-board purification device installed in the vehicle exhaust system. It is generally a cylindrical structure made of double-layer stainless steel plates, with insulation material installed in the double-layer thin plate interlayer. A purifier is installed between the mesh partitions, 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 acts as a catalytic agent, promoting the redox reaction of the pollutants, thereby purifying the vehicle exhaust gas.

[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 purification performance. State parameters for determining the state of the catalyst are reasonably selected to prevent the catalyst from being mistakenly determined to be in a fault state when the catalyst is not activated.

[0049] Step S200 , determining whether the activation state indicates 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 catalytic converter. When the oxygen storage amount is greater than the oxygen storage threshold, the performance of the catalytic converter is in a normal range, and thus it is not necessary to determine other state parameters to directly determine that the catalytic converter is in a non-faulty state.

[0052] Optionally, after determining that the catalytic converter is non-faulty, the activation state of the catalytic converter is changed to activated.

[0053] In step S400, when the activation state indicates that the catalytic converter is activated and the oxygen storage amount is less than the oxygen storage threshold, it is determined that the catalytic converter is faulty. When the cumulative heat value flowing through the catalytic converter is greater than or equal to a preset heat threshold, the activation state indicates that the catalytic converter is activated.

[0054] In an embodiment, when the oxygen storage amount is determined first, the oxygen storage amount is less than the oxygen storage threshold, or the activation state indicates that the catalytic converter is non-activated, it is indicated that the catalytic converter is possibly in a faulty state. In order to prevent misjudgment, it is necessary to determine whether the activation state of the catalytic converter is incorrect, thereby improving the diagnosis accuracy. In this embodiment, the catalytic converter mainly relies on the heat in the exhaust gas of the internal combustion engine to burn the carbon and sulfur in the catalytic converter at high temperature, thereby activating the catalytic converter. In other embodiments, the catalytic converter also needs to be activated by heat. Therefore, whether the catalytic converter is activated is determined by the heat value flowing through the catalytic converter, thereby preventing misjudgment due to the difference between the obtained activation state and the actual activation state.

[0055] Specifically, when the oxygen storage amount is determined first and the oxygen storage amount is less than the oxygen storage threshold, it is indicated that the catalytic converter is non-activated, and thus the oxygen storage amount is less than the oxygen storage threshold. Therefore, the cumulative heat value flowing through the catalytic converter is detected or calculated to determine whether it is greater than or equal to a preset heat threshold. If it is greater than or equal to the heat threshold, it is indicated that the catalytic converter should be activated. Since the oxygen storage amount is less than the oxygen storage threshold, it is indicated that the catalytic converter is in a faulty state. If the cumulative heat value flowing through the catalytic converter is less than the heat threshold, it is indicated that the catalytic converter is non-activated, and thus it is necessary to wait until the cumulative heat value is greater than or equal to the heat threshold, i.e., the catalytic converter is activated, to finally determine whether the catalytic converter is in a faulty state.

[0056] When the activation state is determined first, if the activation state is non-activated, it is necessary to wait until the cumulative heat value is greater than or equal to the heat threshold to finally determine the oxygen storage amount of the catalytic converter and determine whether it is faulty. If the activation state indicates that the catalytic converter is activated, it is still possible to determine whether the catalytic converter is substantially activated by the cumulative heat value. If the catalytic converter is substantially activated, it is necessary to further determine whether the oxygen storage amount 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 catalytic converter is non-faulty. If it is less than the oxygen storage threshold, it is determined that the catalytic converter is faulty.

[0057] Specifically, by presetting a heat threshold value as a judgment condition, it is determined whether the catalytic converter has been activated. The heat threshold value is determined by the catalytic converter type, and the heat threshold values set for the same catalytic converter are similar or the same.

[0058] In an embodiment, due to the characteristics of the hybrid vehicle, there are cases where the number of driving cycles and the number of engine starts are inconsistent, and the length of each engine start can be short. If the judgment condition is formulated in units of driving cycles, there can be no suitable diagnostic conditions in multiple driving cycles, resulting in inaccurate diagnostic results, or the engine is not started in multiple driving cycles, and the catalytic converter is also not activated, which will also make the diagnostic results of the catalytic converter inaccurate. By determining the heat accumulated in the exhaust gas entering the catalytic converter in different driving cycles to determine whether the catalytic converter is activated, the condition of a single driving cycle is not relied on, and in the case of a small number of engine starts and short start time, it still has reference value and high accuracy. In experiments, the accuracy of determining whether the catalytic converter is activated by accumulating the heat of the exhaust gas flowing through the catalytic converter is more than 95%.

[0059] In an embodiment, the heat threshold value required for activation of the catalytic converter is determined according to the catalytic converter, and after the heat threshold value is determined, the oxygen storage capacity of the catalytic converter is further determined by comparing the heat accumulation value of the exhaust gas flowing through the catalytic converter after the heat accumulation value is greater than the heat threshold value required for activation. The oxygen storage capacity of the catalytic converter has a large difference before and after activation, and determining whether the catalytic converter is activated before diagnosing the catalytic converter can improve the accuracy of catalytic converter diagnosis. The oxygen storage capacity of a catalytic converter before and after activation of a vehicle model is shown in the following table:

[0060]

[0061] Specifically, after determining that the catalytic converter has been activated, whether the catalytic converter is faulty is determined by a preset oxygen storage threshold value. For example, as shown in the above table, if the vehicle VIN is 2954, when the estimated oxygen storage capacity of the catalytic converter is 550 mg after determining that the catalytic converter of the vehicle has been activated, it is determined that the catalytic converter is not faulty; when the estimated oxygen storage capacity of the catalytic converter is 300 mg, it is determined that the catalytic converter is faulty.

[0062] Optionally, as shown in Figure 2 determining whether the activation state indicates that the catalytic converter has been activated and comparing the oxygen storage capacity with a preset oxygen storage threshold value includes:

[0063] comparing the oxygen storage capacity with the oxygen storage threshold value;

[0064] when the oxygen storage capacity is greater than or equal to the oxygen storage threshold value, it is determined that the catalytic converter is not faulty;

[0065] When the oxygen storage amount is less than the oxygen storage threshold value, the activation state of the catalytic converter is determined, and if the activation state shows that the catalytic converter is activated, it is determined that the catalytic converter is faulty.

[0066] Optionally, as shown in Figure 3 the determination of whether the activation state shows that the catalytic converter is activated and the comparison of the oxygen storage amount with the preset oxygen storage threshold value include:

[0067] When the activation state shows that the catalytic converter is not activated, it is determined whether the cumulative heat value flowing through the catalytic converter reaches the heat threshold value;

[0068] When the cumulative heat value is less than the heat threshold value, the step of determining whether the cumulative heat value flowing through the catalytic converter reaches the heat threshold value is returned to;

[0069] When the cumulative heat value is greater than or equal to the heat threshold value, the oxygen storage amount is compared with the oxygen storage threshold value, and if the oxygen storage amount is greater than or equal to the oxygen storage threshold value, it is determined that the catalytic converter is not faulty; if the oxygen storage amount is less than the oxygen storage threshold value, it is determined that the catalytic converter is faulty.

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

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

[0072] In an embodiment, when the obtained state parameter is the oxygen storage amount, whether further diagnosis of the state of the catalytic converter is needed is determined by comparing the oxygen storage amount with the oxygen storage threshold value. When the oxygen storage amount is less than the oxygen storage threshold value, if the catalytic converter is activated, it is determined that the catalytic converter is faulty; if the catalytic converter is not activated, the working condition of the catalytic converter needs to be further determined. Therefore, when the oxygen storage amount is less than the oxygen storage threshold value, the flag activation state is obtained, and when the flag activation state is not activated, the heat value flowing through the catalytic converter is further used to assist in determining whether the catalytic converter is activated to prevent misjudgment.

[0073] In an 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 value. When the oxygen storage amount is greater than or equal to the oxygen storage threshold value, it indicates that the catalytic converter has been activated, and at this time, there is no need to determine the activation state of the flag bit of the catalytic converter, and the catalytic converter can be directly determined to be fault-free. In some embodiments, after determining that the catalytic converter is fault-free, the activation state of the flag bit is updated to activated, which is used as the state parameter for the next catalytic converter diagnosis. When the oxygen storage amount is less than the oxygen storage threshold value, the activation state of the flag bit needs to be further determined. When the activation state of the flag bit is activated, it indicates that the catalytic converter has been activated, but the oxygen storage capacity is low, and the catalytic converter is determined to be faulty.

[0074] Optionally, the vehicle catalytic converter state diagnosis method further comprises:

[0075] obtaining an exhaust parameter of the internal combustion engine in the hybrid vehicle, wherein the exhaust parameter comprises an exhaust mass flow, an exhaust temperature, and an exhaust specific heat capacity;

[0076] obtaining the cumulative heat value according to the exhaust mass flow, the exhaust temperature, and the exhaust specific heat capacity.

[0077] In an embodiment, the heat value flowing through the catalytic converter is determined by estimating the exhaust parameters of the internal combustion engine. For example, the exhaust parameters include an exhaust mass flow, an exhaust temperature, and an exhaust specific heat capacity. 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 composition of the exhaust gas. The exhaust parameters are substituted into the heat formula based on fluid to obtain the heat flowing through the catalytic converter. The heat flowing through the catalytic converter obtained by each calculation is added to obtain a cumulative heat value, and the calculation formula of the heat flowing through the catalytic converter obtained by each calculation is represented as:

[0078] Q = mcΔT,

[0079] wherein Q represents the heat value, m represents the exhaust mass flow, c represents the exhaust specific heat capacity, △ T represents the exhaust temperature.

[0080] Optionally, after determining whether the cumulative heat value flowing through the catalytic converter reaches the heat threshold value when the activation state is displayed as not activated, the method further comprises:

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

[0082] In an embodiment, in view of some special scenarios, such as a vehicle just out of the factory, or a vehicle with less number of engine starts and start time, the catalyst in the vehicle is not activated and has a high probability of not being faulty, so when the heat value flowing through the catalyst is less than the heat threshold value, the catalyst is not temporarily determined as a fault state to prevent misjudgment. After a preset time period, the heat value flowing through the catalyst is recalculated, and after the heat value is greater than or equal to the heat threshold value, the flag bit activation state is changed to activated, and the oxygen storage capacity of the catalyst is further determined.

[0083] Optionally, the vehicle catalyst state diagnosis method further comprises:

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

[0085] In an embodiment, when the flag bit activation state is changed to activated, the flag bit activation state is not changed and remains activated when the state parameter is obtained next time, until a signal actively input to change the flag bit activation state, such as the catalyst being replaced, the flag bit activation state is changed to not activated to reset the activation of the catalyst, until the heat flowing through the replaced catalyst exceeds the heat threshold value.

[0086] Optionally, after the activation state of the catalyst is changed to activated as the state parameter obtained next time, the method further comprises:

[0087] In response to an activation state reset request, the activation state is changed to not activated as the state parameter obtained next time.

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

[0089] An acquisition module is configured to acquire a state parameter of a catalyst in a hybrid vehicle, wherein the state parameter comprises an activation state of the catalyst and an oxygen storage capacity of the catalyst;

[0090] A judgment module is configured to judge whether the activation state shows that the catalyst is activated, and compare the oxygen storage capacity with a preset oxygen storage threshold value;

[0091] A first determination module is configured to determine that the catalyst is not faulty when the oxygen storage capacity is greater than or equal to the oxygen storage threshold value.

[0092] a second determination module, 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 computer programs; 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 capacity 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 indicates 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 indicates 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 described above is implemented.

[0101] In other words, a non-volatile computer-readable storage medium stores a computer program, which, when executed by a processor, causes the processor to perform 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 capacity of the catalyst;

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

[0104] determining that the catalytic converter is not faulty when the oxygen storage amount is greater than or equal to the oxygen storage threshold value;

[0105] determining that the catalytic converter is faulty when the activation state indicates that the catalytic converter is activated and the oxygen storage amount is less than the oxygen storage threshold value, wherein the activation state indicates that the catalytic converter is activated when a cumulative heat value flowing through the catalytic converter is greater than or equal to a preset heat threshold value.

[0106] An electronic device that can be a server or a client of the present application will now be described, which is an example of a hardware device that can be applied to aspects of the present application. The electronic device is intended to represent various forms of digital electronic computing devices such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computing devices. The electronic device can also represent various forms of mobile devices such as personal digital processing, cellular telephones, smart phones, wearable devices, and other similar computing devices. The components, their connections, and their functions, as described herein, are meant to be examples only, and are not intended to limit the implementations of the present application described and / or claimed herein.

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

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

[0109] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing relevant hardware, and the program can be stored in a computer readable storage medium. When the program is executed, the program can include the processes of the above-mentioned embodiment methods. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM), a random access memory (RAM), or the like. In this application, the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, which can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present application. In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically independently, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

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

Claims

1. A method for diagnosing the status of a vehicle catalyst, 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 capacity 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 indicates 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 indicates that the catalyst is activated.

2. The vehicle catalyst status diagnosis method according to claim 1, characterized in that: 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; if the activation state indicates activated, it is determined that the catalyst is faulty.

3. The vehicle catalyst status diagnosis method according to claim 1, characterized in that: 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 heat value is greater than or equal to the heat 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: 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: 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 accumulated calorific value is obtained based on 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 indicates 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 and using 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 inactive, which is used as the state parameter to be acquired next time.

8. A vehicle catalyst status diagnostic device, characterized in that: include: an acquisition module, configured to acquire 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 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; a second determination module, 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 configured to implement the vehicle catalyst status diagnosis method according to any one of claims 1 to 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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