A method and system for evaluating motor vehicle pollutant emissions in plateau regions

Abstract

This invention discloses a method and system for assessing pollutant emissions from in-use motor vehicles in plateau areas, relating to the field of motor vehicle pollutant emission technology. The method includes: modeling a target plateau area, generating a road model of the target plateau area, and acquiring environmental information of the target plateau area; applying various environmental factors from the environmental information to the road model to form multiple road models with individual environmental factors; acquiring the current vehicle degradation coefficient for each road model with individual environmental factors, and acquiring and applying the current vehicle's cumulative mileage to the road model to obtain a current vehicle degradation coefficient based on the cumulative mileage; calculating the final degradation coefficient of the current vehicle in the target plateau area based on all current vehicle degradation coefficients; querying the emission factors of the current vehicle, and combining the final degradation coefficient and mileage to calculate the pollutant emissions of the current vehicle.

Description

Technical Field

[0001] This invention belongs to the field of motor vehicle pollutant emission technology, and more specifically, relates to a method and system for assessing pollutant emissions from in-use motor vehicles in plateau areas. Background Technology

[0002] Motor vehicles in use refer to vehicles that have been registered and are operating on roads. As the mileage of a motor vehicle increases, the engine and emission after-treatment system will deteriorate. In particular, motor vehicles that travel for a long time in high-altitude areas are also affected by temperature and altitude, which leads to an increase in pollutant emissions. It can be said that the greater the mileage of a motor vehicle and the worse the environment, the worse the pollutant emissions will be, which is called emission deterioration.

[0003] However, current research is limited to emission degradation in plain areas, with limited research on emission degradation in plateau environments. Therefore, there is an urgent need for a technical solution that can accurately determine the degradation coefficient of motor vehicles, thereby enabling precise assessment of pollutant emissions from motor vehicles in plateau areas. Summary of the Invention

[0004] To address the above technical problems, this invention proposes a method for assessing pollutant emissions from in-use motor vehicles in plateau areas, comprising:

[0005] Model the target plateau region, generate a road model of the target plateau region, and obtain environmental information of the target plateau region. Apply each environmental factor in the environmental information to the road model to form multiple road models with individual environmental factors.

[0006] The current vehicle degradation coefficient of each road model with individual environmental factors is obtained, and the cumulative mileage of the current vehicle is obtained and applied to the road model. The current vehicle degradation coefficient based on the cumulative mileage is obtained, and the final degradation coefficient of the current vehicle in the target plateau area is calculated based on all current vehicle degradation coefficients.

[0007] The emission factors of the current motor vehicle are queried, and the pollutant emissions of the current motor vehicle are calculated by combining the final deterioration coefficient and the mileage.

[0008] Furthermore, each environmental factor in the environmental information is applied to the road model to form multiple road models with individual environmental factors, including: the environmental factors being altitude and ambient temperature;

[0009] Elevation is applied to the road model to create a road model whose environmental information only includes elevation.

[0010] By applying ambient temperature to the road model, a road model is formed that contains only ambient temperature as environmental information.

[0011] Furthermore, obtaining the current vehicle degradation coefficient for each road model with individual environmental factors includes: calculating the current vehicle degradation coefficient for road models whose environmental information only includes altitude, and fitting it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0012] Furthermore, the current vehicle degradation coefficient based on the accumulated mileage is calculated and fitted with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0013] Furthermore, the environmental information calculation only includes the current vehicle degradation coefficient of the road model with ambient temperature, and fits it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0014] Furthermore, the final degradation coefficient of the current motor vehicle in the target plateau region is calculated based on all current vehicle degradation coefficients, including:

[0015] ,

[0016] in, This represents the final degradation coefficient of the current motor vehicle. This refers to the degradation coefficient of a motor vehicle when it is new. The weighting of the current vehicle deterioration coefficient based on accumulated mileage. The current cumulative mileage of the motor vehicle The resulting amplification factor of emissions deterioration The weighting of the current vehicle degradation coefficient in the road model, where altitude is considered an environmental factor. altitude The resulting amplification factor of emissions deterioration The weight of ambient temperature in the road model for the current vehicle deterioration coefficient is determined by ambient temperature as an environmental factor. ambient temperature The resulting amplification factor of emissions deterioration The current vehicle deterioration coefficient is based on the accumulated mileage. The current vehicle degradation coefficient for a road model with altitude as an environmental factor. The current vehicle degradation coefficient for a road model where ambient temperature is considered an environmental factor.

[0017] Furthermore, by querying the current emission factors of the motor vehicle and combining them with the final degradation coefficient and mileage, the current pollutant emissions of the motor vehicle are calculated, including: emission factors. Final degradation factor Mileage = Current pollutant emissions of the vehicle;

[0018] Emission factors Final degradation factor One year's mileage The current number of motor vehicles of a corresponding model = the annual pollutant emissions of the corresponding model.

[0019] This invention also proposes a pollutant emission assessment system for in-use motor vehicles in plateau areas, comprising:

[0020] The modeling module is used to model the target plateau region, generate road models of the target plateau region, and obtain environmental information of the target plateau region. It then applies each environmental factor in the environmental information to the road model to form multiple road models with individual environmental factors.

[0021] The degradation coefficient calculation module is used to obtain the current vehicle degradation coefficient of each road model with individual environmental factors, obtain the current vehicle's cumulative mileage and apply it to the road model, obtain the current vehicle degradation coefficient based on the cumulative mileage, and calculate the final degradation coefficient of the current vehicle in the target plateau area based on all current vehicle degradation coefficients.

[0022] The pollutant emission calculation module is used to query the emission factors of the current motor vehicle and, in combination with the final deterioration coefficient and mileage, calculate the pollutant emissions of the current motor vehicle.

[0023] Furthermore, each environmental factor in the environmental information is applied to the road model to form multiple road models with individual environmental factors, including: the environmental factors being altitude and ambient temperature;

[0024] Elevation is applied to the road model to create a road model whose environmental information only includes elevation.

[0025] By applying ambient temperature to the road model, a road model is formed that contains only ambient temperature as environmental information.

[0026] Furthermore, obtaining the current vehicle degradation coefficient for each road model with individual environmental factors includes: calculating the current vehicle degradation coefficient for road models whose environmental information only includes altitude, and fitting it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0027] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art:

[0028] Through the above technical solution, this invention can correct the emission factors of motor vehicles in high-altitude environments by calculating the deterioration coefficient of motor vehicles in high-altitude areas, and finally calculate the pollutant emissions of motor vehicles. Attached Figure Description

[0029] Figure 1 This is a flowchart of the method in Embodiment 1 of the present invention;

[0030] Figure 2 This is a system structure diagram of Embodiment 2 of the present invention. Detailed Implementation

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] The method provided by this invention can be implemented in a terminal environment that may include one or more of the following components: a processor, a storage medium, and a display screen. The storage medium stores at least one instruction, which is loaded and executed by the processor to implement the method described in the following embodiments.

[0033] A processor may include one or more processing cores. The processor uses various interfaces and lines to connect various parts of the terminal, and performs various functions and processes data by running or executing instructions, programs, code sets or instruction sets stored in the storage medium, and by calling data stored in the storage medium.

[0034] Storage media can include random access memory (RAM) or read-only memory (ROM). Storage media can be used to store instructions, programs, code, code sets, or instructions.

[0035] The display screen is used to show the user interface of each application.

[0036] In addition, those skilled in the art will understand that the structure of the terminal described above does not constitute a limitation on the terminal. The terminal may include more or fewer components, or combine certain components, or have different component arrangements. For example, the terminal may also include radio frequency circuits, input units, sensors, audio circuits, power supplies, and other components, which will not be described in detail here.

[0037] Example 1

[0038] like Figure 1 This embodiment proposes a method for assessing pollutant emissions from in-use motor vehicles in plateau areas, including:

[0039] Step 101: Model the target plateau region, generate a road model of the target plateau region, and obtain environmental information of the target plateau region. Apply each environmental factor in the environmental information to the road model to form multiple road models with individual environmental factors, wherein the environmental factors are altitude and ambient temperature.

[0040] Preferably, elevation is applied to the road model to form a road model whose environmental information only includes elevation; ambient temperature is applied to the road model to form a road model whose environmental information only includes ambient temperature.

[0041] Step 102: Obtain the current vehicle degradation coefficient for each road model with individual environmental factors, and obtain the current vehicle's cumulative mileage and apply it to the road model. Obtain the current vehicle degradation coefficient based on the cumulative mileage, and calculate the final degradation coefficient of the current vehicle in the target plateau area based on all current vehicle degradation coefficients.

[0042] Specifically, obtaining the current vehicle degradation coefficient for each road model with individual environmental factors includes: calculating the current vehicle degradation coefficient for road models whose environmental information only includes altitude, and fitting it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0043] Preferably, the current vehicle degradation coefficient of the road model whose environmental information only includes altitude is calculated using the following formula:

[0044] ,

[0045] in, The current vehicle degradation coefficient for a road model with altitude as an environmental factor. altitude The resulting amplification factor of emissions deterioration This represents the degradation coefficient of a motor vehicle when it was new.

[0046] Preferably, the altitude is calculated using the following formula. The resulting emission amplification factor :

[0047] ,

[0048] in, This is an adjustment factor used to control the effect of pressure on degradation. Current altitude Atmospheric pressure below, Standard atmospheric pressure This is an adjustment factor used to control the effect of oxygen content on degradation. Current altitude oxygen content below To determine the standard oxygen content, the current vehicle degradation coefficient of a road model containing only altitude environmental information is fitted with the corresponding actual degradation coefficient to obtain the standard oxygen content. and The value can be fitted using the least squares method.

[0049] Preferably, can and The values ​​are initialized to 0.4 and 0.6 respectively. These values ​​are only used for initialization; the specific values ​​should be determined based on the fitting results. This embodiment is only provided as an example and is not intended to limit the scope. and The specific value.

[0050] Specifically, the current vehicle deterioration coefficient based on the accumulated mileage is calculated and fitted with the corresponding actual deterioration coefficient until the current vehicle deterioration coefficient and the actual deterioration coefficient are less than a preset error threshold.

[0051] Preferably, the current vehicle deterioration coefficient based on accumulated mileage is calculated using the following formula:

[0052] ,

[0053] in, The current vehicle deterioration coefficient is based on the accumulated mileage. The current cumulative mileage of the motor vehicle The resulting amplification factor for worsened emissions.

[0054] Preferably, the current cumulative mileage of the motor vehicle is calculated using the following formula. The resulting emission amplification factor :

[0055] ,

[0056] in, This is an adjustment factor used to control the initial deterioration trend. An adjustment factor to control long-term wear trends, This is the current reference lifespan mileage for motor vehicles. Similarly, the engine type adjustment factor is obtained by fitting the current vehicle deterioration factor based on accumulated mileage to the corresponding actual deterioration factor. , and The value can be fitted using the least squares method.

[0057] Preferably, in the case of , and During initialization, for example, if a naturally aspirated engine's emission control system is relatively stable initially but weakens slightly later, it can be set... =0.1, =0.25, if it is a turbocharged direct injection engine, cold start and initial carbon buildup issues are obvious, it can be set to... ==0.3, =0.15, and for later vehicle usage, turbocharged direct injection engines, due to the presence of the turbocharger, will have significantly higher engine temperatures than naturally aspirated engines. Therefore, if the current vehicle is a turbocharged direct injection engine, initialization... At that time, appropriately increase The value, for example, is set to 1.2. If the current vehicle is a naturally aspirated engine, the initialization... At that time, appropriately reduce The value, for example, is set to 1.1. Of course, regardless of... , still All values ​​need to be assigned according to the fitted results. The values ​​given in this example are just sample initialization values.

[0058] Specifically, the environmental information calculation only includes the current vehicle degradation coefficient of the road model with ambient temperature, and fits it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0059] Preferably, the current vehicle degradation coefficient of the road model whose environmental information only includes ambient temperature is calculated using the following formula:

[0060] ,

[0061] in, The current vehicle degradation coefficient for a road model using ambient temperature as an environmental factor. ambient temperature The resulting amplification factor for worsened emissions.

[0062] Preferably, the ambient temperature is calculated using the following formula. The resulting emission amplification factor :

[0063] ,

[0064] in, The overall disturbance enhancement magnitude is used to characterize the overall sensitivity of motor vehicles to this type of temperature-disturbance mechanism. This is the critical temperature threshold: below this temperature, the degradation effect intensifies (e.g., 10℃). It serves as a scale for temperature degradation response, used to control the sensitivity of emission disturbance intensity to temperature changes. This is the temperature difference modulation intensity coefficient, used to describe the strength of the impact of temperature fluctuations on emission disturbances. This refers to the ambient temperature difference during vehicle operation. This is the temperature difference sensing threshold (e.g., 5℃), used to control the sensitivity of the temperature difference excitation effect. For only when >0 is Otherwise, it is 0, the purpose of which is to ensure activation only at low temperatures. This indicates a cold environment where disturbances are most amplified, easily inducing cold-start PM peaks. If the cooling system is not operating at full capacity, the difference between intake air temperature and engine block temperature will be large, resulting in significant emission fluctuations. Similarly, by fitting the current vehicle degradation coefficient of the road model, which only includes ambient temperature as environmental information, to the corresponding actual degradation coefficient, the following method is used to obtain... and The value can be fitted using the least squares method.

[0065] Preferred, regarding and The initial values ​​are also given in the following example in this embodiment, but users can personalize the initialization according to their own needs and adjust them according to the final fitting result. and Assigning values, as shown in the example below:

[0066] Initialize to 0.05-0.25, where 0.05: light-duty gasoline vehicles, 0.15: medium-duty diesel vehicles, and 0.25: old or modified vehicles; Initialize to 0.1-1.2, where 0.1 represents vehicles with strong temperature control and small emission fluctuations, 0.6 represents medium-sized vehicles, and 1.2 represents vehicles with drastic emission fluctuations at high altitudes and during cold starts.

[0067] Step 103: Query the current emission factor of the motor vehicle, and calculate the current pollutant emissions of the motor vehicle in combination with the final deterioration coefficient and mileage.

[0068] Preferably, the emission factors for each vehicle model are shown in the table below:

[0069] Emission factor table for various gasoline vehicle models

[0070]

[0071] Specifically, the final degradation coefficient of the current vehicle in the target plateau region is calculated based on all current vehicle degradation coefficients, including:

[0072] ,

[0073] in, This represents the final degradation coefficient of the current motor vehicle. This refers to the degradation coefficient of a motor vehicle when it is new. The weighting of the current vehicle deterioration coefficient based on accumulated mileage. The weighting of the current vehicle degradation coefficient in the road model, where altitude is considered an environmental factor. The weight of the current vehicle deterioration coefficient in the road model is given by ambient temperature as an environmental factor.

[0074] Preferred, It can be set to [0.9-1.2]. For example, a passenger car with limited load capacity can be set to 0.9, while a truck that is frequently heavily loaded can be set to 1.2. Additionally, .

[0075] Specifically, the emission factors of the current motor vehicle are queried, and combined with the final deterioration coefficient and mileage, the current pollutant emissions of the motor vehicle are calculated, including: emission factors. Final degradation factor Mileage = Current pollutant emissions of the vehicle;

[0076] Emission factors Final degradation factor One year's mileage The current number of motor vehicles of a corresponding model = the annual pollutant emissions of the corresponding model.

[0077] Example 2

[0078] like Figure 2 As shown, this embodiment proposes a pollutant emission assessment system for in-use motor vehicles in plateau areas, including:

[0079] The modeling module is used to model the target plateau region, generate a road model of the target plateau region, and obtain environmental information of the target plateau region. It applies each environmental factor in the environmental information to the road model to form multiple road models with individual environmental factors. The environmental factors are altitude and ambient temperature.

[0080] Preferably, the elevation is applied to the road model to form a road model whose environmental information only includes elevation;

[0081] By applying ambient temperature to the road model, a road model is formed that contains only ambient temperature as environmental information.

[0082] The degradation coefficient calculation module is used to obtain the current vehicle degradation coefficient of each road model with individual environmental factors, obtain the current vehicle's cumulative mileage and apply it to the road model, obtain the current vehicle degradation coefficient based on the cumulative mileage, and calculate the final degradation coefficient of the current vehicle in the target plateau area based on all current vehicle degradation coefficients.

[0083] Specifically, obtaining the current vehicle degradation coefficient for each road model with individual environmental factors includes: calculating the current vehicle degradation coefficient for road models whose environmental information only includes altitude, and fitting it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0084] Specifically, the current vehicle deterioration coefficient based on the accumulated mileage is calculated and fitted with the corresponding actual deterioration coefficient until the current vehicle deterioration coefficient and the actual deterioration coefficient are less than a preset error threshold.

[0085] Specifically, the environmental information calculation only includes the current vehicle degradation coefficient of the road model with ambient temperature, and fits it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

[0086] Specifically, the final degradation coefficient of the current vehicle in the target plateau region is calculated based on all current vehicle degradation coefficients, including:

[0087] ,

[0088] in, This represents the final degradation coefficient of the current motor vehicle. This refers to the degradation coefficient of a motor vehicle when it is new. The weighting of the current vehicle deterioration coefficient based on accumulated mileage. The current cumulative mileage of the motor vehicle The resulting amplification factor of emissions deterioration The weighting of the current vehicle degradation coefficient in the road model, where altitude is considered an environmental factor. altitude The resulting amplification factor of emissions deterioration The weight of ambient temperature in the road model for the current vehicle deterioration coefficient is determined by ambient temperature as an environmental factor. ambient temperature The resulting amplification factor of emissions deterioration The current vehicle deterioration coefficient is based on the accumulated mileage. The current vehicle degradation coefficient for a road model with altitude as an environmental factor. The current vehicle degradation coefficient for a road model where ambient temperature is considered an environmental factor.

[0089] The pollutant emission calculation module is used to query the emission factors of the current motor vehicle and, in combination with the final deterioration coefficient and mileage, calculate the pollutant emissions of the current motor vehicle.

[0090] Specifically, the emission factors of the current motor vehicle are queried, and combined with the final deterioration coefficient and mileage, the current pollutant emissions of the motor vehicle are calculated, including: emission factors. Final degradation factor Mileage = Current pollutant emissions of the vehicle;

[0091] Emission factors Final degradation factor One year's mileage The current number of motor vehicles of a corresponding model = the annual pollutant emissions of the corresponding model.

[0092] This embodiment 2 corresponds to the technical solution of embodiment 1, so it will not be described again in this embodiment 2.

[0093] Example 3

[0094] This invention also proposes a storage medium storing multiple instructions for implementing the aforementioned method for assessing pollutant emissions from in-use motor vehicles in plateau areas.

[0095] Optionally, in this embodiment, the storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any mobile terminal in a group of mobile terminals.

[0096] Optionally, in this embodiment, the storage medium is configured to store program code for performing the steps of Embodiment 1.

[0097] Example 4

[0098] This invention also proposes an electronic device, including a processor and a storage medium connected to the processor. The storage medium stores multiple instructions, which can be loaded and executed by the processor to enable the processor to execute the aforementioned method for assessing pollutant emissions from in-use motor vehicles in high-altitude areas.

[0099] Specifically, the electronic device in this embodiment can be a computer terminal, which may include one or more processors and a storage medium.

[0100] The storage medium can be used to store software programs and modules, such as the program instructions / modules in the method for assessing pollutant emissions from in-use motor vehicles in high-altitude areas according to an embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the storage medium, thereby realizing the aforementioned method for assessing pollutant emissions from in-use motor vehicles in high-altitude areas. The storage medium may include high-speed random access storage media, and may also include non-volatile storage media, such as one or more magnetic storage systems, flash memory, or other non-volatile solid-state storage media. In some instances, the storage medium may further include storage media remotely configured relative to the processor, which can be connected to the terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0101] The processor can execute the steps of Example 1 by calling the information and application stored in the storage medium through the transmission system.

[0102] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0103] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0104] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The system embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0105] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0106] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0107] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, optical disks, and other media capable of storing program code.

[0108] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for assessing pollutant emissions from in-use motor vehicles in plateau areas, characterized in that, include: Model the target plateau region, generate a road model of the target plateau region, and obtain environmental information of the target plateau region. Apply each environmental factor in the environmental information to the road model to form multiple road models with individual environmental factors. The current vehicle degradation coefficient is obtained for each road model with individual environmental factors, and the cumulative mileage of the current vehicle is obtained and applied to the road model. The current vehicle degradation coefficient based on the cumulative mileage is then calculated. Finally, the final degradation coefficient of the current vehicle in the target plateau region is calculated based on all current vehicle degradation coefficients, including: The environmental information used in the calculation only includes the current vehicle degradation coefficient of the road model based on altitude: ， in, The current vehicle degradation coefficient for a road model with altitude as an environmental factor. altitude The resulting amplification factor of emissions deterioration This refers to the degradation coefficient of a motor vehicle when it was new. ， in, This is an adjustment factor used to control the effect of pressure on degradation. Current altitude Atmospheric pressure below, Standard atmospheric pressure This is an adjustment factor used to control the effect of oxygen content on degradation. Current altitude oxygen content below Standard oxygen content; Calculate the current vehicle degradation coefficient for a road model whose environmental information only includes ambient temperature: ， in, The current vehicle degradation coefficient for a road model using ambient temperature as an environmental factor. ambient temperature The resulting amplification factor for emissions deterioration; ， in, The overall disturbance enhancement magnitude is used to characterize the overall sensitivity of motor vehicles to the ambient temperature-disturbance mechanism. The critical temperature threshold, below which The degradation effect is amplified. It serves as a scale for temperature degradation response, used to control the sensitivity of emission disturbance intensity to changes in ambient temperature. This is the temperature difference modulation intensity coefficient, used to describe the strength of the impact of ambient temperature fluctuations on emission disturbances. This refers to the ambient temperature difference during vehicle operation. This is the temperature difference sensing threshold, used to control the sensitivity of the temperature difference excitation effect; For only when >0 is Otherwise, it is 0; Calculate the current vehicle deterioration coefficient based on the accumulated mileage and fit it with the corresponding actual deterioration coefficient until the current vehicle deterioration coefficient and the actual deterioration coefficient are less than the preset error threshold. Calculate the current vehicle deterioration coefficient based on cumulative mileage. : ， in, The current cumulative mileage of the motor vehicle The resulting amplification factor for emissions deterioration; ， in, This is an adjustment factor used to control the initial deterioration trend. An adjustment factor to control long-term wear trends, This is the current reference lifespan mileage for motor vehicles. Adjustment factor for engine type; The final deterioration coefficient of the current vehicle in the target plateau region is calculated based on all current vehicle deterioration coefficients, including: ， in, This represents the final degradation coefficient of the current motor vehicle. The weighting of the current vehicle deterioration coefficient based on accumulated mileage. The weighting of the current vehicle degradation coefficient in the road model, where altitude is considered an environmental factor. The weight of ambient temperature in the current vehicle deterioration coefficient of the road model is used as an environmental factor. The emission factors of the current motor vehicle are queried, and the pollutant emissions of the current motor vehicle are calculated by combining the final deterioration coefficient and the mileage.

2. The method for assessing pollutant emissions from in-use motor vehicles in plateau areas as described in claim 1, characterized in that, Each environmental factor in the environmental information is applied to the road model to form multiple road models with individual environmental factors, including: the environmental factors being altitude and ambient temperature; Elevation is applied to the road model to create a road model whose environmental information only includes elevation. By applying ambient temperature to the road model, a road model is formed that contains only ambient temperature as environmental information.

3. The method for assessing pollutant emissions from in-use motor vehicles in plateau areas as described in claim 2, characterized in that, Obtaining the current vehicle degradation coefficient for each road model with individual environmental factors includes: calculating the current vehicle degradation coefficient for road models whose environmental information only includes altitude, and fitting it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

4. The method for assessing pollutant emissions from in-use motor vehicles in plateau areas as described in claim 3, characterized in that, The current vehicle degradation coefficient of the road model, which only includes ambient temperature, is calculated and fitted with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

5. The method for assessing pollutant emissions from in-use motor vehicles in plateau areas as described in claim 1, characterized in that, The current emission factor of the vehicle is queried, and combined with the final deterioration coefficient and mileage, the current pollutant emissions of the vehicle are calculated as follows: emission factor * final deterioration coefficient * mileage = current pollutant emissions of the vehicle. Emission factor * final degradation factor * annual mileage * current number of vehicles of the corresponding model = annual pollutant emissions of the corresponding model.

6. A pollutant emission assessment system for in-use motor vehicles in plateau areas, characterized in that, include: The modeling module is used to model the target plateau region, generate road models of the target plateau region, and obtain environmental information of the target plateau region. It then applies each environmental factor in the environmental information to the road model to form multiple road models with individual environmental factors. The degradation coefficient calculation module is used to obtain the current vehicle degradation coefficient for each road model with individual environmental factors, and to obtain the current vehicle's cumulative mileage and apply it to the road model, obtain the current vehicle degradation coefficient based on the cumulative mileage, and calculate the final degradation coefficient of the current vehicle in the target plateau region based on all current vehicle degradation coefficients, including: The environmental information used in the calculation only includes the current vehicle degradation coefficient of the road model based on altitude: ， in, The current vehicle degradation coefficient for a road model with altitude as an environmental factor. altitude The resulting amplification factor of emissions deterioration This refers to the degradation coefficient of a motor vehicle when it was new. ， in, This is an adjustment factor used to control the effect of pressure on degradation. Current altitude Atmospheric pressure below, Standard atmospheric pressure This is an adjustment factor used to control the effect of oxygen content on degradation. Current altitude oxygen content below Standard oxygen content; Calculate the current vehicle degradation coefficient for a road model whose environmental information only includes ambient temperature: ， in, The current vehicle degradation coefficient for a road model using ambient temperature as an environmental factor. ambient temperature The resulting amplification factor for emissions deterioration; ， in, The overall disturbance enhancement magnitude is used to characterize the overall sensitivity of motor vehicles to the ambient temperature-disturbance mechanism. The critical temperature threshold, below which The degradation effect is amplified. It serves as a scale for temperature degradation response, used to control the sensitivity of emission disturbance intensity to changes in ambient temperature. This is the temperature difference modulation intensity coefficient, used to describe the strength of the impact of ambient temperature fluctuations on emission disturbances. This refers to the ambient temperature difference during vehicle operation. This is the temperature difference sensing threshold, used to control the sensitivity of the temperature difference excitation effect; For only when >0 is Otherwise, it is 0; Calculate the current vehicle deterioration coefficient based on the accumulated mileage and fit it with the corresponding actual deterioration coefficient until the current vehicle deterioration coefficient and the actual deterioration coefficient are less than the preset error threshold. Calculate the current vehicle deterioration coefficient based on cumulative mileage. : ， in, This is the amplification factor for emissions degradation caused by the current cumulative mileage of motor vehicles; ， in, This is an adjustment factor used to control the initial deterioration trend. An adjustment factor to control long-term wear trends, This is the current reference lifespan mileage for motor vehicles. Adjustment factor for engine type; The final deterioration coefficient of the current vehicle in the target plateau region is calculated based on all current vehicle deterioration coefficients, including: ， in, This represents the final degradation coefficient of the current motor vehicle. The weighting of the current vehicle deterioration coefficient based on accumulated mileage. The weighting of the current vehicle degradation coefficient in the road model, where altitude is considered an environmental factor. The weight of ambient temperature in the current vehicle deterioration coefficient of the road model is used as an environmental factor. The pollutant emission calculation module is used to query the emission factors of the current motor vehicle and, in combination with the final deterioration coefficient and mileage, calculate the pollutant emissions of the current motor vehicle.

7. The emission assessment system for in-use motor vehicles in plateau areas as described in claim 6, characterized in that, Each environmental factor in the environmental information is applied to the road model to form multiple road models with individual environmental factors, including: the environmental factors being altitude and ambient temperature; Elevation is applied to the road model to create a road model whose environmental information only includes elevation. By applying ambient temperature to the road model, a road model is formed that contains only ambient temperature as environmental information.

8. The emission assessment system for in-use motor vehicles in plateau areas as described in claim 7, characterized in that, Obtaining the current vehicle degradation coefficient for each road model with individual environmental factors includes: calculating the current vehicle degradation coefficient for road models whose environmental information only includes altitude, and fitting it with the corresponding actual degradation coefficient until the current vehicle degradation coefficient and the actual degradation coefficient are less than a preset error threshold.

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