Electric heating catalytic converter evaluation method and system, readable storage medium and vehicle

Abstract

The invention discloses an electric heating catalytic converter evaluation method and system, a readable storage medium and a vehicle, and the method comprises the steps: building a catalytic converter framework, connecting a heat flow test bench, and sequentially setting a first temperature monitoring region, a second temperature monitoring region and a third temperature monitoring region on the catalytic converter framework in a segmented manner; respectively carrying out static air temperature rise performance test, flow temperature rise performance test and assembly temperature rise performance test on the catalyst architecture, and obtaining test data; and comparing information based on the test data and a preset standard value to obtain a performance evaluation result and an application scheme. According to the method, an engine stand and calibration are not needed, and the heating performance of the active energy control electric heating catalyst and the temperature rise performance of the selective reduction catalyst are mainly evaluated through the simulation of a heat flow stand; therefore, the performance of the active energy control electric heating catalytic converter, the contribution to tail gas emission and the influence on the whole vehicle battery framework can be accurately evaluated through the method and the device.

Description

Technical Field

[0001] The present invention relates to the field of catalyst performance evaluation, and in particular to an evaluation method, system, readable storage medium and vehicle for an electrically heated catalyst. Background Art

[0002] In order to meet the requirements of the next stage of ultra-low emission regulations, one of the key technical routes for traditional diesel vehicles is to add an active energy control catalyst EHC (Electric Heat Catalyst), the full name of which is electric heating catalyst. The energy required for the operation of the active energy control EHC electric heating catalyst comes from the vehicle battery (12V). Since the battery architecture of traditional fuel vehicles has a small power design margin and a high cost of change, the operating power of the EHC electric heating catalyst needs to be as small as possible without affecting the normal operation of other electrical systems to quickly meet the temperature rise performance and achieve emission requirements.

[0003] SCR (Selective Catalytic Reduction) is the full name of selective reduction catalyst. It is a technology used to remove NOX compounds and is currently widely used in the automotive field. In theory, SCR catalysts can efficiently treat engine NOx emission pollutants. At a specific temperature (200-500°C), the conversion efficiency can be as high as over 90%. However, the conversion efficiency is very low below 180°C. EHC electrically heated catalysts are required for temperature compensation to improve the catalyst's emission reduction effect on exhaust pollutants under low-temperature conditions.

[0004] However, current performance research on EHC electrically heated catalysts mainly relies on the evaluation of exhaust emissions on the entire vehicle or engine bench, which has the disadvantages of high engine bench investment and long calibration control time. At the same time, the impact on the battery architecture of the entire vehicle needs to be evaluated after the emission performance is resolved, which may lead to repeated calibration and design. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an electric heating catalyst evaluation method, system, readable storage medium and vehicle, aiming to solve the problem that the current performance research of electric heating catalysts mainly relies on the whole vehicle or engine test bench to evaluate exhaust emissions, resulting in high investment, long calibration control time, and repeated calibration and design problems.

[0006] To achieve the above object, the present invention provides an evaluation method for an electrically heated catalyst, the method comprising:

[0007] Establishing a catalyst structure and connecting it to a heat flow test bench, and sequentially setting a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area in sections of the catalyst structure;

[0008] Performing still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture respectively, and obtaining test data;

[0009] Compare test data with preset standard values ​​to obtain performance evaluation results and application solutions.

[0010] In summary, according to the electric heating catalyst evaluation method proposed by the present invention, by constructing a catalyst framework, connecting the catalyst framework with a heat flow test bench, and setting a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area on the catalyst framework, it is used to monitor whether the temperature of the selective reduction catalyst conversion environment meets the standard; the catalyst framework is respectively subjected to a static air temperature rise performance test, a flow temperature rise performance test, and an assembly temperature rise performance test to obtain test data of the catalyst framework; finally, the obtained test data is compared with the preset performance parameters, and the emission performance and energy consumption performance of the current catalyst framework are judged by the root distance comparison results. The present invention does not require an engine bench and calibration, and mainly evaluates the heating performance of the active energy control electric heating catalyst and the temperature rise performance before the selective reduction catalyst through the simulation of the heat flow bench. The post-processing used in the present invention is consistent with the whole vehicle, and the characteristics of the selective reduction catalyst itself are clear, so the performance of the active energy control electric heating catalyst, the contribution to exhaust emissions, and the impact on the battery architecture of the whole vehicle can be more accurately evaluated through the present invention, which has direct guiding significance for the actual development of whole vehicle projects in the future.

[0011] According to one aspect of the above technical solution, the step of establishing a catalyst structure and sequentially setting a first temperature monitoring zone, a second temperature monitoring zone, and a third temperature monitoring zone in the catalyst structure in sections specifically includes:

[0012] Establishing a catalyst structure and connecting it to an output pipeline of a thermal flow test bench, and installing temperature sensors on the output pipeline in sequence along the first temperature monitoring zone, the second temperature monitoring zone, and the third temperature monitoring zone;

[0013] The catalyst architecture includes at least an electric heating catalyst module, a diesel oxidation catalyst module, a diesel particle capture module, a selective reduction catalyst module, and a muffler module;

[0014] The first temperature monitoring zone is arranged between the diesel oxidation catalyst module and the diesel particulate capture module, the second temperature monitoring zone is arranged between the diesel particulate capture module and the selective reduction catalyst module, and the third temperature monitoring zone is arranged between the selective reduction catalyst module and the muffler module.

[0015] According to one aspect of the above technical solution, the steps of performing still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture respectively and obtaining test data specifically include:

[0016] The catalyst structure is controlled to be in a still air environment. Based on the control variable principle, the electric heating catalytic module is connected to a test voltage through a variable scheme including at least the electric heating catalyst carrier structure, the electric heating catalyst resistance wire specification, and the electric heating catalyst hole density, and the temperature rise rate and heating temperature of the heating plate in the electric heating catalytic module are obtained.

[0017] According to one aspect of the above technical solution, after completing the still air temperature rise performance test, the integrated electric heating catalytic module is subjected to a flow rate temperature rise performance test;

[0018] The catalyst structure is installed on a test platform, and air of a first preset temperature and a first preset flow rate is introduced into the test platform, a test voltage is connected to the positive and negative electrodes of the electric heating catalytic module, and based on the control variable principle and through the variable scheme, the test is performed to obtain the temperature rise rate of the first temperature monitoring zone and the heating temperature of the heating plate in the electric heating catalytic module.

[0019] According to one aspect of the above technical solution, the flow rate temperature rise performance test is completed and the assembly temperature rise performance test is performed;

[0020] The catalyst structure is installed on the exhaust assembly, air of a second preset temperature and a second preset flow rate is introduced into the exhaust assembly, and a test voltage is connected. The heating is started and the time t required for the second temperature monitoring zone to reach the temperature threshold and the temperature of the first temperature monitoring zone are recorded.

[0021] According to one aspect of the above technical solution, the step of obtaining comparison information between the test data and the preset standard value, and adjusting the electrically heated catalyst according to the comparison information to obtain the performance evaluation result specifically includes:

[0022] Based on the data obtained from the assembly temperature rise performance test, the emission performance is evaluated by comparing the time t required for the second temperature monitoring zone to reach the temperature threshold with the emission performance design requirement time t0. If t≤t0, the solution meets the emission performance requirements. If t>t0, the solution meets the emission performance requirements.

[0023] Based on the scheme that has passed the emission performance evaluation, an energy consumption performance evaluation is performed. The required energy consumption W = P*t. W is compared with the energy consumption margin W0 output by the battery architecture. If W≤W0, the energy consumption requirements of the entire vehicle battery architecture are met. If W>W0, each scheme is combined with the temperature of the third temperature monitoring zone to obtain an application solution.

[0024] The present invention further provides an electric heating catalyst evaluation system, which is used to implement the above-mentioned electric heating catalyst evaluation method, and the system includes:

[0025] A temperature monitoring module, used to establish a catalyst structure and connect to a heat flow test bench, and to sequentially set a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area in the catalyst structure segment;

[0026] A data acquisition module, used to perform still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture, and acquire test data;

[0027] The evaluation acquisition module is used to compare information based on test data with preset standard values ​​to obtain performance evaluation results and application solutions.

[0028] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned electric heating catalyst evaluation method is implemented.

[0029] The present invention further provides a vehicle, the vehicle comprising a memory and a processor, wherein:

[0030] The memory is used to store computer programs;

[0031] When the processor is used to execute the computer program stored in the memory, the above-mentioned electric heating catalyst evaluation method is implemented.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of the electric heating catalyst evaluation method in the first embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the catalyst architecture in the first embodiment of the present invention;

[0035] Figure 3 is a schematic structural diagram of an electric heating catalyst evaluation system in a second embodiment of the present invention;

[0036] Figure 4 It is a schematic structural diagram of a vehicle using an electric heating catalyst evaluation method in a fourth embodiment of the present invention.

[0037] Component symbol description:

[0038] The electric heating catalytic module 41 , the diesel oxidation catalytic module 42 , the diesel particle capture module 43 , the selective reduction catalytic module 44 , the muffler module 45 , the first temperature monitoring zone 46 , the second temperature monitoring 47 , and the third temperature monitoring zone 48 . DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0042] Embodiment 1

[0043] like Figure 1 The flowchart of the electric heating catalyst evaluation method in the present invention is shown, and the electric heating catalyst evaluation method includes the following steps S01 to S03, wherein:

[0044] S01, establishing a catalyst structure and connecting it to a heat flow test bench, and sequentially setting a first temperature monitoring zone, a second temperature monitoring zone, and a third temperature monitoring zone in sections of the catalyst structure.

[0045] like Figure 2 As shown, in order to avoid exhaust pollutants emitted by the engine during the cold start phase from being directly discharged into the atmosphere and to ensure that the selective reduction catalyst can efficiently treat the engine NOx emission pollutants at more than 180°, a catalyst architecture is established, which at least includes an electric heating catalyst module 41, a diesel oxidation catalyst module 42, a diesel particulate capture module 43, a selective reduction catalyst module 44, a silencer module, a temperature sensor module and an electric heating catalyst control switch module.

[0046] The electric heating catalytic module 41 is composed of an electric heating wire, a supporting device, positive and negative electrode connectors and a metal carrier. It uses a vehicle battery or a power battery as a power source and heats the exhaust gas by generating heat through a resistance wire. Its core performance design parameters include: temperature rise power, voltage platform, EHC carrier structure, resistance wire specifications, hole density, etc. Under the same temperature rise power and voltage platform, the EHC carrier structure design, resistance wire specifications and hole density design directly affect the heating efficiency and energy consumption, thereby affecting the catalytic efficiency of the entire exhaust system architecture and the energy loss of the electrical platform.

[0047] For the purpose of temperature monitoring, the catalyst structure and the heat flow test bench need to be connected to the adapted output pipeline. The thermal management measures (such as glass fiber) wrapped in the output pipeline machine need to be consistent with the actual vehicle to ensure the reliability of the test. A first temperature monitoring area 46, a second temperature monitoring area 47, and a third temperature monitoring area 48 are sequentially arranged on the straight section of the heat flow test bench connected to the output pipeline. The first temperature monitoring area 46 is arranged between the diesel oxidation catalyst module 42 and the diesel particle capture module 43, the second temperature monitoring area 47 is arranged between the diesel particle capture module 43 and the selective reduction catalyst module 44, and the third temperature monitoring area 48 is arranged between the selective reduction catalyst module 44 and the muffler module 45. Thermocouples are sequentially installed on the first temperature monitoring area 46, the second temperature monitoring area 47, and the third temperature monitoring area 48 for monitoring the temperature.

[0048] S02. Performing a still air temperature rise performance test, a flow rate temperature rise performance test, and an assembly temperature rise performance test on the catalyst architecture respectively, and obtaining test data.

[0049] After the test equipment is built, the catalyst architecture is subjected to still air temperature rise performance tests, flow rate temperature rise performance tests, and assembly temperature rise performance tests in turn.

[0050] The catalyst structure is controlled to be in a static air environment, and based on the control variable principle, the electric heating catalyst module 41 is connected to a test voltage through a variable scheme including at least the electric heating catalyst carrier structure, the electric heating catalyst resistance wire specification, and the electric heating catalyst hole density, and the temperature rise rate and heating temperature of the heating disk in the electric heating catalyst module 41 are obtained. In this embodiment, the test voltage used is usually a 12V DC voltage.

[0051] After completing the still air temperature rise performance test, the integrated electric heating catalytic module 41 is subjected to a flow rate temperature rise performance test;

[0052] The catalyst structure is installed on a test platform, and air of a first preset temperature (normal temperature) at a first preset flow rate (10KG / H) is introduced into the test platform. A test voltage (12V DC voltage) is connected to the positive and negative electrodes of the electric heating catalytic module 41. Based on the control variable principle and through the variable scheme, the test is performed to obtain the temperature rise rate of the first temperature monitoring zone 46 and the heating temperature of the heating plate in the electric heating catalytic module 41.

[0053] Complete the flow rate temperature rise performance test and conduct the assembly temperature rise performance test;

[0054] The catalyst structure is installed on the exhaust assembly, and air of a second preset temperature (100°) at a second preset flow rate (40KG / H) is introduced into the exhaust assembly, and a test voltage (12V DC voltage) is connected. The heating is started and the time t required for the second temperature monitoring zone 47 to reach the temperature threshold (180°) and the temperature of the first temperature monitoring zone 46 are recorded. When the temperature of the second temperature monitoring zone 47 reaches 180°, it is stable for 10 seconds and then the power is turned off.

[0055] S03. Compare the test data with the preset standard values ​​to obtain performance evaluation results and application solutions.

[0056] Based on the data obtained from the assembly temperature rise performance test, the emission performance is evaluated by comparing the time t required for the second temperature monitoring zone 47 to reach the temperature threshold with the emission performance design requirement time t0. If t≤t0, the solution meets the emission performance requirements. If t>t0, the solution meets the emission performance requirements.

[0057] Based on the scheme that has passed the emission performance evaluation, an energy consumption performance evaluation is performed, and the required energy consumption W = P*t. W is compared with the energy consumption margin W0 output by the battery architecture. If W≤W0, the energy consumption requirements of the battery architecture of the entire vehicle are met. If W>W0, and the energy consumption gap between the schemes that have passed the emission performance evaluation does not exceed the preset difference, the scheme with a smaller energy consumption W is given priority.

[0058] In summary, according to the electric heating catalyst evaluation method proposed by the present invention, by constructing a catalyst framework, connecting the catalyst framework with a heat flow test bench, and setting a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area on the catalyst framework, it is used to monitor whether the temperature of the selective reduction catalyst conversion environment meets the standard; the catalyst framework is respectively subjected to a static air temperature rise performance test, a flow temperature rise performance test, and an assembly temperature rise performance test to obtain test data of the catalyst framework; finally, the obtained test data is compared with the preset performance parameters, and the emission performance and energy consumption performance of the current catalyst framework are judged by the root distance comparison results. The present invention does not require an engine bench and calibration, and mainly evaluates the heating performance of the active energy control electric heating catalyst and the temperature rise performance before the selective reduction catalyst through the simulation of the heat flow bench. The post-processing used in the present invention is consistent with the whole vehicle, and the characteristics of the selective reduction catalyst itself are clear, so the performance of the active energy control electric heating catalyst, the contribution to exhaust emissions, and the impact on the battery architecture of the whole vehicle can be more accurately evaluated through the present invention, which has direct guiding significance for the actual development of whole vehicle projects in the future.

[0059] Embodiment 2

[0060] Another aspect of the present invention is to provide an electric heating catalyst evaluation system, please refer to Figure 3 , which is a schematic diagram of the structure of the electric heating catalyst evaluation system in the second embodiment of the present invention, and the electric heating catalyst evaluation system includes:

[0061] The temperature monitoring module 11 is used to establish a catalyst structure and connect to a heat flow test bench, and to sequentially set a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area in the catalyst structure in sections;

[0062] A data acquisition module 12 is used to perform still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture, and acquire test data;

[0063] The evaluation acquisition module 13 is used to compare information based on the test data with the preset standard value to obtain performance evaluation results and application solutions.

[0064] Furthermore, in some optional embodiments, the temperature monitoring module 11 further includes:

[0065] A temperature monitoring unit, used to establish a catalyst structure and connect to an output pipeline of a thermal flow test bench, and to install temperature sensors on the output pipeline in sequence along the first temperature monitoring zone, the second temperature monitoring zone, and the third temperature monitoring zone;

[0066] The catalyst architecture includes at least an electric heating catalyst module, a diesel oxidation catalyst module, a diesel particle capture module, a selective reduction catalyst module, and a muffler module;

[0067] The first temperature monitoring zone is arranged between the diesel oxidation catalyst module and the diesel particulate capture module, the second temperature monitoring zone is arranged between the diesel particulate capture module and the selective reduction catalyst module, and the third temperature monitoring zone is arranged between the selective reduction catalyst module and the muffler module.

[0068] Furthermore, in some optional embodiments, the data acquisition module 12 further includes:

[0069] The data acquisition unit is used to control the catalyst structure to be in a still air environment. Based on the control variable principle, the electric heating catalytic module is connected to a test voltage through a variable scheme including at least the electric heating catalyst carrier structure, the electric heating catalyst resistance wire specification, and the electric heating catalyst hole density, and the temperature rise rate and heating temperature of the heating plate in the electric heating catalytic module are obtained.

[0070] After completing the still air temperature rise performance test, the integrated electric heating catalytic module is subjected to a flow rate temperature rise performance test;

[0071] The catalyst structure is installed on a test platform, and air of a first preset temperature and a first preset flow rate is introduced into the test platform, a test voltage is connected to the positive and negative electrodes of the electric heating catalytic module, and based on the control variable principle and through the variable scheme, the test is performed to obtain the temperature rise rate of the first temperature monitoring zone and the heating temperature of the heating plate in the electric heating catalytic module.

[0072] Complete the flow rate temperature rise performance test and conduct the assembly temperature rise performance test;

[0073] The catalyst structure is installed on the exhaust assembly, air of a second preset temperature and a second preset flow rate is introduced into the exhaust assembly, and a test voltage is connected. The heating is started and the time t required for the second temperature monitoring zone to reach the temperature threshold and the temperature of the first temperature monitoring zone are recorded.

[0074] Furthermore, in some optional embodiments, the evaluation acquisition module 13 further includes:

[0075] An evaluation acquisition unit is used to evaluate the emission performance based on the data obtained from the assembly temperature rise performance test, and compare the time t required for the second temperature monitoring zone to reach the temperature threshold with the emission performance design requirement time t0. If t≤t0, the solution meets the emission performance requirements, and if t>t0, the solution meets the emission performance exceeding the standard.

[0076] Based on the scheme that has passed the emission performance evaluation, an energy consumption performance evaluation is performed. The required energy consumption W = P*t. W is compared with the energy consumption margin W0 output by the battery architecture. If W≤W0, the energy consumption requirements of the entire vehicle battery architecture are met. If W>W0, each scheme is combined with the temperature of the third temperature monitoring zone to obtain an application solution.

[0077] In summary, according to the electric heating catalyst evaluation system proposed by the present invention, by constructing a catalyst framework, connecting the catalyst framework with a heat flow test bench, and setting a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area on the catalyst framework, it is used to monitor whether the temperature of the selective reduction catalyst conversion environment meets the standard; the catalyst framework is respectively subjected to a static air temperature rise performance test, a flow temperature rise performance test, and an assembly temperature rise performance test to obtain test data of the catalyst framework; finally, the obtained test data is compared with the preset performance parameters, and the emission performance and energy consumption performance of the current catalyst framework are judged by the root distance comparison results. The present invention does not require an engine bench and calibration, and mainly evaluates the heating performance of the active energy control electric heating catalyst and the temperature rise performance before the selective reduction catalyst through the simulation of the heat flow bench. The post-processing used in the present invention is consistent with the whole vehicle, and the characteristics of the selective reduction catalyst itself are clear, so the performance of the active energy control electric heating catalyst, the contribution to exhaust emissions, and the impact on the battery architecture of the whole vehicle can be more accurately evaluated through the present invention, which has direct guiding significance for the actual development of whole vehicle projects in the future.

[0078] Embodiment 3

[0079] Another aspect of the present invention further provides a computer-readable storage medium having one or more computer programs stored thereon, which implement the above-mentioned electrically heated catalyst evaluation method when executed by a processor.

[0080] Those skilled in the art will appreciate that the logic or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable storage medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0081] More specific examples of computer-readable storage media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or processing in another suitable manner as necessary, and then stored in a computer memory.

[0082] Embodiment 4

[0083] Another aspect of the present invention provides a vehicle, see Figure 4 , shown is a vehicle in the fourth embodiment of the present invention, including a memory 20, a processor 10, and a computer program 30 stored in the memory and executable on the processor, and when the processor 10 executes the computer program 30, the electric heating catalyst evaluation method as described above is implemented.

[0084] Specifically, the vehicle may be a computer, a vehicle testing device, etc. The processor 10 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip in some embodiments, and is used to run the program code or process data stored in the memory 20, such as executing an access restriction program.

[0085] The memory 20 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a hard disk, a multimedia card, a card-type memory (for example, an SD or DX memory, etc.), a magnetic memory, a disk, an optical disk, etc. In some embodiments, the memory 20 may be an internal storage unit of the vehicle, such as a hard disk of the vehicle. In other embodiments, the memory 20 may also be an external storage device of the vehicle, such as a plug-in hard disk equipped on the vehicle, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Further, the memory 20 may also include both an internal storage unit of the vehicle and an external storage device. The memory 20 may be used not only to store application software and various types of data installed in the vehicle, but also to temporarily store data that has been output or is to be output.

[0086] It should be pointed out that Figure 4 The structure shown does not constitute a limitation on the vehicle. In other embodiments, the vehicle may include Figure 4 Fewer or more components may be shown, or certain components may be combined, or arranged differently.

[0087] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0089] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for evaluating an electrically heated catalyst, characterized in that: The method comprises: Establishing a catalyst structure and connecting it to a heat flow test bench, and sequentially setting a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area in sections of the catalyst structure; Performing still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture respectively, and obtaining test data; Compare test data with preset standard values ​​to obtain performance evaluation results and application solutions.

2. The method for evaluating an electrically heated catalyst according to claim 1, characterized in that: The step of establishing a catalyst structure and sequentially setting a first temperature monitoring zone, a second temperature monitoring zone, and a third temperature monitoring zone in the catalyst structure in sections specifically includes: Establishing a catalyst structure and connecting it to an output pipeline of a thermal flow test bench, and installing temperature sensors on the output pipeline in sequence along the first temperature monitoring zone, the second temperature monitoring zone, and the third temperature monitoring zone; The catalyst architecture includes at least an electric heating catalyst module, a diesel oxidation catalyst module, a diesel particle capture module, a selective reduction catalyst module, and a muffler module; The first temperature monitoring zone is arranged between the diesel oxidation catalyst module and the diesel particulate capture module, the second temperature monitoring zone is arranged between the diesel particulate capture module and the selective reduction catalyst module, and the third temperature monitoring zone is arranged between the selective reduction catalyst module and the muffler module.

3. The method for evaluating an electrically heated catalyst according to claim 1, characterized in that: The steps of respectively performing still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture and obtaining test data specifically include: The catalyst structure is controlled to be in a still air environment. Based on the control variable principle, the electric heating catalytic module is connected to a test voltage through a variable scheme including at least the electric heating catalyst carrier structure, the electric heating catalyst resistance wire specification, and the electric heating catalyst hole density, and the temperature rise rate and heating temperature of the heating plate in the electric heating catalytic module are obtained.

4. The method for evaluating an electrically heated catalyst according to claim 3, characterized in that: After completing the still air temperature rise performance test, the integrated electric heating catalytic module is subjected to a flow rate temperature rise performance test; The catalyst structure is installed on a test platform, and air of a first preset temperature and a first preset flow rate is introduced into the test platform, a test voltage is connected to the positive and negative electrodes of the electric heating catalytic module, and based on the control variable principle and through the variable scheme, the test is performed to obtain the temperature rise rate of the first temperature monitoring zone and the heating temperature of the heating plate in the electric heating catalytic module.

5. The method for evaluating an electrically heated catalyst according to claim 4, characterized in that: Complete the flow rate temperature rise performance test and conduct the assembly temperature rise performance test; The catalyst structure is installed on the exhaust assembly, air of a second preset temperature and a second preset flow rate is introduced into the exhaust assembly, and a test voltage is connected. The heating is started and the time t required for the second temperature monitoring zone to reach the temperature threshold and the temperature of the first temperature monitoring zone are recorded.

6. The method for evaluating an electrically heated catalyst according to claim 1, characterized in that: The step of obtaining comparison information between the test data and the preset standard value, and adjusting the electric heating catalyst according to the comparison information to obtain the performance evaluation result specifically includes: Based on the data obtained from the assembly temperature rise performance test, the emission performance is evaluated by comparing the time t required for the second temperature monitoring zone to reach the temperature threshold with the emission performance design requirement time t0. If t≤t0, the solution meets the emission performance requirements. If t>t0, the solution meets the emission performance requirements. Based on the scheme that has passed the emission performance evaluation, an energy consumption performance evaluation is performed. The required energy consumption W = P*t. W is compared with the energy consumption margin W0 output by the battery architecture. If W≤W0, the energy consumption requirements of the entire vehicle battery architecture are met. If W>W0, each scheme is combined with the temperature of the third temperature monitoring zone to obtain an application solution.

7. An electric heating catalyst evaluation system, the electric heating catalyst evaluation system is used to implement the electric heating catalyst evaluation method according to any one of claims 1 to 6, the system comprising: A temperature monitoring module, used to establish a catalyst structure and connect to a heat flow test bench, and to sequentially set a first temperature monitoring area, a second temperature monitoring area, and a third temperature monitoring area in the catalyst structure segment; A data acquisition module, used to perform still air temperature rise performance test, flow rate temperature rise performance test, and assembly temperature rise performance test on the catalyst architecture, and acquire test data; The evaluation acquisition module is used to compare information based on test data with preset standard values ​​to obtain performance evaluation results and application solutions.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the electric heating catalyst evaluation method according to any one of claims 1 to 6 is implemented.

9. A vehicle, characterized in that: The vehicle comprises a memory and a processor, wherein: The memory is used to store computer programs; When the processor is used to execute the computer program stored in the memory, the electric heating catalyst evaluation method described in any one of claims 1-6 is implemented.

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