A remote diagnosis method, device, medium and equipment for vehicle emissions

Abstract

The present application discloses a remote diagnosis method, device, medium and equipment for vehicle emissions, which obtain remote transmission data of a target vehicle; clean the remote transmission data to obtain target data; divide the target data into multiple operating ranges based on vehicle speed; calculate the operating emission factor of each operating range; calculate the load emission factor of each operating range in different load ranges; determine the emission result of the target vehicle based on the load emission factor and the operating emission factor; that is, remotely obtain the operation data of the target vehicle, divide the data into operating ranges, calculate the operating emission factor of each operating range and the load emission factor of each load range and operating range, and comprehensively judge the emission result of the target vehicle based on the load emission factor and the operating emission factor, so as to realize remote real-time monitoring of the emission of the target vehicle, and accurately diagnose the emission result of the target vehicle by comprehensively considering the emission factors in each range.

Description

Technical Field

[0001] The present application relates to the technical field of remote diagnosis of vehicle emissions, and in particular to a remote diagnosis method, device, medium and equipment for vehicle emissions. Background Art

[0002] With the continuous growth of the number of motor vehicles, the emission of motor vehicle pollutants (HC, CO and NOx) in my country has increased significantly, and the average proportion of motor vehicle exhaust pollutants in urban air pollution has also increased. In order to reduce the exhaust emissions of motor vehicles, exhaust treatment devices are usually added to motor vehicles. However, some motor vehicles reduce the use of exhaust treatment devices in order to save costs during actual operation, or the exhaust gas of motor vehicles still exceeds the standard without knowing it during long-term use. Therefore, it is necessary to monitor whether the emissions of motor vehicles exceed the standard. Most of the existing technologies adopt the method of on-site testing, that is, the motor vehicle to be tested is placed on the bench for experiment, or the motor vehicle to be tested is driven under specific working conditions for testing. However, these methods can only perform a single test, and it is impossible to conduct long-term tracking tests on motor vehicles, and it is difficult to avoid high-emission operation of motor vehicles. Therefore, there is an urgent need for a method that can monitor the emissions of motor vehicles for a long time and diagnose them. Summary of the invention

[0003] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a remote diagnosis method, device, medium and equipment for vehicle emissions.

[0004] According to one aspect of the present application, a remote diagnosis method for vehicle emissions is provided, comprising: obtaining remote transmission data of a target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X emission concentration, coolant temperature, the remote transmission data includes a timestamp; based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration of the remote transmission data is cleaned to obtain the target data; based on the vehicle speed, the target data is divided into multiple operating ranges; wherein each operating range is a vehicle speed range; the operating emission factor of each operating range is calculated; wherein the operating emission factor represents the NO in the operating range. X emission rate; based on the operating condition emission factor and the engine load, calculating the load emission factor of each operating condition interval in different load intervals; based on the load emission factor and the operating condition emission factor, determining the emission result of the target vehicle.

[0005] In one embodiment, determining the emission result of the target vehicle based on the load emission factor and the operating condition emission factor includes: determining the emission result of the target vehicle based on the load emission factor of the current driving cycle of the target vehicle and the load emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes.

[0006] In one embodiment, determining the emission result of the target vehicle based on the load emission factor of the current driving cycle and the load emission factor of the previous driving cycle of the target vehicle includes: calculating a first difference between the load emission factor of the current driving cycle and the load emission factor of the load interval and operating condition interval corresponding to the previous driving cycle; obtaining a first abnormal load emission factor whose first difference is greater than a first difference threshold; wherein the first difference threshold is positively correlated with the load emission factor of the previous driving cycle; if the number of the first abnormal load emission factors is greater than a first number threshold, determining that the emission of the target vehicle exceeds the standard.

[0007] In one embodiment, based on the load emission factor of the current driving cycle of the target vehicle and the load emission factor of the previous driving cycle, determining the emission result of the target vehicle includes: calculating a second difference between the load emission factor of each engine load interval of the current driving cycle and the load emission factor of the corresponding load interval of the previous driving cycle; wherein the load emission factor of the engine load interval is obtained by weighted summation of the load emission factors of all operating condition intervals corresponding to the engine load interval; obtaining a second abnormal load emission factor whose second difference is greater than a second difference threshold; wherein the second difference threshold is positively correlated with the load emission factor of the previous driving cycle; if the number of the second abnormal load emission factors is greater than the second number threshold, determining that the emission of the target vehicle exceeds the standard.

[0008] In one embodiment, determining the emission result of the target vehicle based on the load emission factor and the operating condition emission factor includes: determining the emission result of the target vehicle based on the operating condition emission factor of the current driving cycle of the target vehicle and the operating condition emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes.

[0009] In one embodiment, determining the emission result of the target vehicle based on the operating emission factor of the current driving cycle and the operating emission factor of the previous driving cycle of the target vehicle includes: calculating a third difference between the operating emission factor of the current driving cycle and the operating emission factor of the previous driving cycle; wherein the operating emission factor of the current driving cycle is obtained by weighted summing the operating emission factors of all operating intervals of the current driving cycle, and the third difference is positively correlated with the operating emission factor of the previous driving cycle; if the third difference is greater than a third difference threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0010] In one embodiment, determining the emission result of the target vehicle based on the load emission factor and the operating condition emission factor includes: if the operating condition emission factor of the current driving cycle of the target vehicle is greater than a displacement threshold, determining that the emission of the target vehicle exceeds the standard; wherein the operating condition emission factor of the current driving cycle of the target vehicle is obtained by weighted summing up the operating condition emission factors of all operating condition intervals of the current driving cycle.

[0011] According to another aspect of the present application, a remote diagnostic device for vehicle emissions is provided, comprising: a remote data acquisition module, for acquiring remote transmission data of a target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X emission concentration, coolant temperature, the remote transmission data includes a timestamp; a target data acquisition module for acquiring data based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration of the remote transmission data is cleaned to obtain the target data; a working condition interval division module is used to divide the target data into multiple working condition intervals based on the vehicle speed; wherein each working condition interval is a vehicle speed interval; a working condition factor calculation module is used to calculate the working condition emission factor of each working condition interval; wherein the working condition emission factor represents the NO in the working condition interval X emission rate; a load factor calculation module, used to calculate the load emission factor of each operating condition interval in different load intervals based on the operating condition emission factor and the engine load; an emission result determination module, used to determine the emission result of the target vehicle based on the load emission factor and the operating condition emission factor.

[0012] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute any of the above methods.

[0013] According to another aspect of the present application, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; and the processor is used to execute any of the above-described methods.

[0014] The present application provides a remote diagnosis method, device, medium and equipment for vehicle emissions, which obtains remote transmission data of a target vehicle; wherein the remote transmission data includes the target vehicle's speed, engine speed, engine fuel flow, intake volume, NO X Emission concentration, coolant temperature, remote transmission data including timestamp; based on engine speed, vehicle speed, coolant temperature and NO X The emission concentration of the remote transmission data is cleaned to obtain the target data; based on the vehicle speed, the target data is divided into multiple operating ranges; each operating range is a vehicle speed range; the operating emission factor of each operating range is calculated; the operating emission factor represents the NO X emission rate; based on the operating condition emission factor and the engine load, calculate the load emission factor of each operating condition interval in different load intervals; based on the load emission factor and the operating condition emission factor, determine the emission result of the target vehicle; that is, by remotely obtaining the operating data of the target vehicle, and dividing the data into operating condition intervals, for each operating condition interval, calculate its operating condition emission factor and the load emission factor of each load interval and operating condition interval, and comprehensively judge the emission result of the target vehicle based on the load emission factor and the operating condition emission factor, so as to realize remote real-time monitoring of the emission of the target vehicle, and accurately diagnose the emission result of the target vehicle by comprehensively considering the emission factors in each interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 It is a flowchart of a remote diagnosis method for vehicle emissions provided by an exemplary embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the structure of a remote diagnosis device for vehicle emissions provided by an exemplary embodiment of the present application.

[0018] Figure 3 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0019] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0020] Figure 1 FIG. 1 is a flow chart of a remote diagnosis method for vehicle emissions provided by an exemplary embodiment of the present application. Figure 1 As shown, the remote diagnosis method of vehicle emissions includes the following steps:

[0021] Step 110: Acquire the remote transmission data of the target vehicle.

[0022] The remote transmission data includes the target vehicle’s speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp. The remote transmission data can also output the engine torque, and the load value of the target vehicle can be calculated based on the engine output torque. This application uses the OBD communication terminal of the target vehicle (such as a diesel vehicle, etc.) to read the relevant remote transmission data from the vehicle ECU, and transmits it to the cloud platform periodically (for example, at a frequency of 1HZ) through a wireless network (such as 5G, etc.) to achieve real-time monitoring of the emissions of the target vehicle.

[0023] Step 120: Based on engine speed, vehicle speed, coolant temperature and NO X The emission concentration is determined by cleaning the remote transmission data to obtain the target data.

[0024] After acquiring the remote transmission data, the present application cleans the remote transmission data to eliminate invalid data or interference data, so as to reduce the amount of calculation and improve the monitoring accuracy. Specifically, the data at a certain moment is deleted when any of the following conditions are met: engine speed is less than 500RPM, vehicle speed is greater than or equal to 150km / h, engine coolant temperature is less than 70℃, NOx instantaneous concentration is greater than 2800PPM, NOx instantaneous concentration is less than 0.

[0025] Optionally, the present application can use 30 seconds as a time window to average the output value of the NOx transmitter downstream of the exhaust after-treatment device to eliminate the impact of data abnormalities; at the same time, it can also divide the short trip into the calculation quantity source of NOx emissions, and the effective number of short trips exceeds 1,800.

[0026] Step 130: Divide the target data into a plurality of operating ranges based on the vehicle speed.

[0027] Among them, each working condition interval is a vehicle speed interval. This application divides the target data into 12 intervals based on speed, including: [1km / h, 10km / h), [10km / h, 20km / h), [20km / h, 30km / h), [30km / h, 40km / h), [40km / h, 50km / h), [50km / h, 60km / h), [60km / h, 70km / h), [70km / h, 80km / h), [80km / h, 90km / h), [90km / h, 100km / h), [100km / h, 110km / h), [110km / h, 150km / h).

[0028] Step 140: Calculate the operating emission factor for each operating range.

[0029] Among them, the operating condition emission factor represents the NO X Specifically, the instantaneous NO emission rate corresponding to each vehicle speed is counted. X The emission and instantaneous mileage of the vehicle, the instantaneous NO X The sum of the emission and the instantaneous mileage is the NO X The total emissions and total mileage of a single operating interval are equal to the NO X The total emissions divided by the total mileage in this operating range.

[0030] Among them, instantaneous NO X The calculation formula for emissions is:

[0031] ;

[0032] in, For instantaneous NO X Emissions (in g), is the instantaneous concentration of NOx downstream of the exhaust aftertreatment device (in ppm), is the air intake volume (in kg / h), is the engine fuel flow rate (in L / h).

[0033] The calculation formula for instantaneous mileage is:

[0034] ;

[0035] in, is the mileage of the vehicle at the i-th second (in meters), are the vehicle speeds at the i-th second and i+1 second respectively (in km / h).

[0036] Step 150: Calculate the load emission factor of each operating condition interval within different load intervals based on the operating condition emission factor and the engine load.

[0037] The present application can divide the engine load into 5 load intervals, namely 0~20%, 20%~40%, 40%~60%, 60%~80%, 80%~100%, and respectively calculate the NOx emission factor table of 60 areas of the combination of 5 load intervals and 12 speed intervals. Specifically, the present application determines the engine load according to the engine output torque contained in the target data in the operating condition interval, so that the 12 speed intervals can be further divided into 60 intervals (a table or matrix with speed and engine load as dimensions). It should be understood that the present application can also divide the engine load into 3 intervals, such as a low load interval (0~20%), a medium load interval (20%~40%), and a high load interval (40%~100%). The present application does not limit the number of intervals for dividing the engine load.

[0038] Step 160: Determine the emission result of the target vehicle based on the load emission factor and the operating condition emission factor.

[0039] After calculating the load emission factor and the operating condition emission factor, this application determines the emission result of the target vehicle by combining the load emission factor and the operating condition emission factor to determine the NO X Whether the emission exceeds the standard.

[0040] The present application provides a remote diagnosis method for vehicle emissions, which obtains remote transmission data of a target vehicle; wherein the remote transmission data includes the target vehicle's speed, engine speed, engine fuel flow, intake volume, NO X Emission concentration, coolant temperature, remote transmission data including timestamp; based on engine speed, vehicle speed, coolant temperature and NO X The emission concentration of the remote transmission data is cleaned to obtain the target data; based on the vehicle speed, the target data is divided into multiple operating ranges; each operating range is a vehicle speed range; the operating emission factor of each operating range is calculated; the operating emission factor represents the NO Xemission rate; based on the operating condition emission factor and the engine load, calculate the load emission factor of each operating condition interval in different load intervals; based on the load emission factor and the operating condition emission factor, determine the emission result of the target vehicle; that is, by remotely obtaining the operating data of the target vehicle, and dividing the data into operating condition intervals, for each operating condition interval, calculate its operating condition emission factor and the load emission factor of each load interval and operating condition interval, and comprehensively judge the emission result of the target vehicle based on the load emission factor and the operating condition emission factor, so as to realize remote real-time monitoring of the emission of the target vehicle, and accurately diagnose the emission result of the target vehicle by comprehensively considering the emission factors in each interval.

[0041] In one embodiment, the specific implementation method of the above step 160 can be: determining the emission result of the target vehicle based on the load emission factor of the current driving cycle of the target vehicle and the load emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes.

[0042] This application compares the load emission factor of the current driving cycle with the load emission factor of the previous driving cycle to determine the NO in the current driving cycle. X The emission rate of the target vehicle is calculated by comparing the growth rate of the target vehicle in the previous driving cycle to obtain a relative comparison result, which is used as the basis for determining the emission result of the target vehicle, and the situation of exceeding the emission standard of the target vehicle can be quickly discovered.

[0043] In one embodiment, the specific implementation method of the above step 160 can be: calculating the first difference between the load emission factor of the current driving cycle and the load emission factor of the load interval and operating condition interval corresponding to the previous driving cycle; obtaining a first abnormal load emission factor whose first difference is greater than a first difference threshold; wherein the first difference threshold is positively correlated with the load emission factor of the previous driving cycle; if the number of the first abnormal load emission factors is greater than the first number threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0044] This application calculates the first difference between the load emission factor of the current driving cycle and the load emission factor of the load interval and working condition interval corresponding to the previous driving cycle, and determines whether the first difference is greater than the first difference threshold. By counting the areas where the first difference in the load emission factors corresponding to 60 areas is greater than the first difference threshold, the abnormal area is determined. If the number of abnormal areas is large, it means that the emission of the target vehicle exceeds the standard. Otherwise, it is considered that the emission of the target vehicle does not exceed the standard. For example, the area where the first difference exceeds 20% of the emission factor of the area corresponding to the previous driving cycle is determined as an abnormal area. If the number of abnormal areas exceeds 80% of the total number of areas, it is determined that the emission of the target vehicle exceeds the standard.

[0045] In one embodiment, the specific implementation method of the above step 160 may be: calculating the second difference between the load emission factor of each engine load interval of the current driving cycle and the load emission factor of the corresponding load interval of the previous driving cycle; wherein the load emission factor of the engine load interval is obtained by the weighted sum of the load emission factors of all operating condition intervals corresponding to the engine load interval; obtaining a second abnormal load emission factor whose second difference is greater than a second difference threshold; wherein the second difference threshold is positively correlated with the load emission factor of the previous driving cycle; if the number of the second abnormal load emission factors is greater than the second number threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0046] This application calculates the second difference between the load emission factor of each engine load interval in the current driving cycle and the load emission factor of the corresponding load interval in the previous driving cycle, and determines whether the second difference is greater than the second difference threshold. By counting the areas where the second difference in the load emission factors of the above five load intervals is greater than the second difference threshold, the abnormal load interval is determined. If the number of abnormal load intervals is large, it means that the emissions of the target vehicle exceed the standard. Otherwise, it is considered that the emissions of the target vehicle do not exceed the standard. For example, the load interval whose second difference exceeds 20% of the emission factor of the load interval corresponding to the previous driving cycle is determined as an abnormal load interval. If the number of abnormal load intervals exceeds 60% of the total number of load intervals, it is determined that the emissions of the target vehicle exceed the standard. Among them, the calculation formula of the load emission factor of the engine load interval is:

[0047] ;

[0048] in, is the load emission factor of the mth load interval, is the load emission factor of the ith speed interval under the mth load interval, m is the total number of load intervals, R Lm-Vi It is the time proportion of the ith speed interval in the entire target data under the mth load interval.

[0049] In one embodiment, the specific implementation method of the above step 160 can be: determining the emission result of the target vehicle based on the operating condition emission factor of the current driving cycle of the target vehicle and the operating condition emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes.

[0050] This application compares the operating emission factor of the current driving cycle with the operating emission factor of the previous driving cycle to determine the NO in the current driving cycle. X The emission rate of the target vehicle is calculated by comparing the growth rate of the target vehicle in the previous driving cycle to obtain a relative comparison result, which is used as the basis for determining the emission result of the target vehicle, and the situation of exceeding the emission standard of the target vehicle can be quickly discovered.

[0051] In one embodiment, the specific implementation method of the above step 160 can be: calculate the third difference between the operating condition emission factor of the current driving cycle and the operating condition emission factor of the previous driving cycle; wherein the operating condition emission factor of the current driving cycle is obtained by weighted summing up the operating condition emission factors of all operating condition intervals of the current driving cycle, and the third difference is positively correlated with the operating condition emission factor of the previous driving cycle; if the third difference is greater than the third difference threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0052] This application calculates the third difference between the operating emission factor of the current driving cycle and the operating emission factor of the previous driving cycle, and determines whether the third difference is greater than the third difference threshold. If the third difference is greater than the third difference threshold, it means that the emission of the target vehicle exceeds the standard, otherwise it is considered that the emission of the target vehicle does not exceed the standard. For example, the third difference is set to 20% of the operating emission factor of the previous driving cycle. If the operating emission factor of the current driving cycle exceeds 20% of the operating emission factor of the previous driving cycle, it is determined that the emission of the target vehicle exceeds the standard. Among them, the calculation formula of the operating emission factor of the current driving cycle is:

[0053] ;

[0054] in, is the emission factor of the driving cycle, E Vi-NOx is the emission factor of the operating condition in the i-th speed range, R Vi is the time proportion of the i-th speed interval in the entire target data.

[0055] In one embodiment, the specific implementation method of the above step 160 can be: if the operating condition emission factor of the current driving cycle of the target vehicle is greater than the displacement threshold, it is determined that the emission of the target vehicle exceeds the standard; wherein, the operating condition emission factor of the current driving cycle of the target vehicle is obtained by weighted summing up the operating condition emission factors of all operating condition intervals of the current driving cycle.

[0056] This application calculates the operating emission factor of the current driving cycle of the target vehicle (the specific calculation method is as described above), and compares the operating emission factor of the current driving cycle with the displacement threshold (for example, 1.1g / km). If the operating emission factor of the current driving cycle is greater than the displacement threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0057] In one embodiment, if the emission factor of the current driving cycle increases by more than 20% compared to the emission factor of the previous driving cycle, the target vehicle is judged to have exceeded the emission standard and an early warning is issued. At the same time, the top ten regions with the largest emission factor change rates are given as high-emission characterization intervals to facilitate subsequent tracing of emission problems of the target vehicle. If the emission factor change rate is less than -20%, it means that the target vehicle has reduced its emissions after adjustment, and the target vehicle is marked as not exceeding the emission standard.

[0058] Figure 2 FIG. 1 is a schematic diagram of a remote diagnostic device for vehicle emissions provided by an exemplary embodiment of the present application. Figure 2 As shown, the remote diagnostic device 20 for vehicle emissions includes: a remote data acquisition module 21, which is used to acquire remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X emission concentration, coolant temperature, and remote transmission data including timestamp; target data acquisition module 22 for acquiring data based on engine speed, vehicle speed, coolant temperature and NO X The emission concentration of the remote transmission data is cleaned to obtain the target data; the operating interval division module 23 is used to divide the target data into multiple operating intervals based on the vehicle speed; wherein each operating interval is a vehicle speed interval; the operating factor calculation module 24 is used to calculate the operating emission factor of each operating interval; wherein the operating emission factor represents the NO X emission rate; a load factor calculation module 25 for calculating the load emission factor of each operating condition interval in different load intervals based on the operating condition emission factor and the engine load; an emission result determination module 26 for determining the emission result of the target vehicle based on the load emission factor and the operating condition emission factor.

[0059] The present application provides a remote diagnostic device for vehicle emissions, which acquires remote transmission data of a target vehicle through a remote data acquisition module 21; wherein the remote transmission data includes the target vehicle's speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration, coolant temperature, and remote transmission data include timestamps; the target data acquisition module 22 is based on engine speed, vehicle speed, coolant temperature and NO X The emission concentration of the remote transmission data is cleaned to obtain the target data; the operating interval division module 23 divides the target data into multiple operating intervals based on the vehicle speed; wherein each operating interval is a vehicle speed interval; the operating factor calculation module 24 calculates the operating emission factor of each operating interval; wherein the operating emission factor represents the NO Xemission rate; the load factor calculation module 25 calculates the load emission factor of each operating condition interval in different load intervals based on the operating condition emission factor and the engine load; the emission result determination module 26 determines the emission result of the target vehicle based on the load emission factor and the operating condition emission factor; that is, by remotely acquiring the operating data of the target vehicle and dividing the data into operating condition intervals, calculating the operating condition emission factor for each operating condition interval and the load emission factor for each load interval and operating condition interval, and comprehensively judging the emission result of the target vehicle based on the load emission factor and the operating condition emission factor, so as to realize remote real-time monitoring of the emission of the target vehicle, and accurately diagnose the emission result of the target vehicle by comprehensively considering the emission factors in each interval.

[0060] In one embodiment, the emission result determination module 26 can be further configured to determine the emission result of the target vehicle based on the load emission factor of the current driving cycle of the target vehicle and the load emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes.

[0061] In one embodiment, the emission result determination module 26 can be further configured to: calculate a first difference between the load emission factor of the current driving cycle and the load emission factor of the load interval and operating condition interval corresponding to the previous driving cycle; obtain a first abnormal load emission factor whose first difference is greater than a first difference threshold; wherein the first difference threshold is positively correlated with the load emission factor of the previous driving cycle; if the number of the first abnormal load emission factors is greater than the first number threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0062] In one embodiment, the emission result determination module 26 can be further configured to: calculate the second difference between the load emission factor of each engine load interval of the current driving cycle and the load emission factor of the corresponding load interval of the previous driving cycle; wherein the load emission factor of the engine load interval is obtained by the weighted sum of the load emission factors of all operating condition intervals corresponding to the engine load interval; obtain a second abnormal load emission factor whose second difference is greater than a second difference threshold; wherein the second difference threshold is positively correlated with the load emission factor of the previous driving cycle; if the number of the second abnormal load emission factors is greater than the second number threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0063] In one embodiment, the emission result determination module 26 can be further configured to determine the emission result of the target vehicle based on the operating emission factor of the current driving cycle of the target vehicle and the operating emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes.

[0064] In one embodiment, the emission result determination module 26 can be further configured to: calculate the third difference between the operating condition emission factor of the current driving cycle and the operating condition emission factor of the previous driving cycle; wherein the operating condition emission factor of the current driving cycle is obtained by weighted summing up the operating condition emission factors of all operating condition intervals of the current driving cycle, and the third difference is positively correlated with the operating condition emission factor of the previous driving cycle; if the third difference is greater than the third difference threshold, it is determined that the emission of the target vehicle exceeds the standard.

[0065] In one embodiment, the emission result determination module 26 can be further configured as follows: if the operating emission factor of the current driving cycle of the target vehicle is greater than the displacement threshold, it is determined that the emission of the target vehicle exceeds the standard; wherein, the operating emission factor of the current driving cycle of the target vehicle is obtained by weighted summing up the operating emission factors of all operating intervals of the current driving cycle.

[0066] Below, reference Figure 3 The electronic device according to the embodiment of the present application is described. The electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the collected input signal from them.

[0067] Figure 3 A block diagram of an electronic device according to an embodiment of the present application is illustrated.

[0068] like Figure 3 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0069] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0070] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may run the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0071] In one example, the electronic device 10 may further include: an input device 13 and an output device 14 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0072] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, which is used to receive the collected input signals from the first device and the second device.

[0073] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0074] The output device 14 can output various information to the outside, including the determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0075] Of course, to simplify, Figure 3 Only some of the components related to the present application in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 10 may also include any other appropriate components.

[0076] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0077] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0078] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps of the method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0079] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0080] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0081] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0082] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0083] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0084] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A remote diagnosis method for vehicle emissions, characterized in that: include: Acquire the remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp; Based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration is cleaned for the remote transmission data to obtain target data; Based on the vehicle speed, the target data is divided into a plurality of operating condition intervals; wherein each operating condition interval is a vehicle speed interval; Calculate the operating emission factor for each operating range; wherein the operating emission factor represents the NO in the operating range X The emission rate; Based on the operating condition emission factor and the engine load, calculating the load emission factor of each operating condition interval in different load intervals; Determining an emission result of the target vehicle based on the load emission factor and the operating condition emission factor; The determining of the emission result of the target vehicle based on the load emission factor and the operating condition emission factor includes: Determine the emission result of the target vehicle based on the load emission factor of the current driving cycle of the target vehicle and the load emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes; The determining of the emission result of the target vehicle based on the load emission factor of the current driving cycle and the load emission factor of the previous driving cycle of the target vehicle comprises: Calculating a first difference between the load emission factor of the current driving cycle and the load emission factor of the load interval and operating condition interval corresponding to the previous driving cycle; Acquire a first abnormal load emission factor when the first difference is greater than a first difference threshold; wherein the first difference threshold is positively correlated with the load emission factor of the previous driving cycle; If the number of the first abnormal load emission factors is greater than a first number threshold, it is determined that the emission of the target vehicle exceeds the standard.

2. A remote diagnosis method for vehicle emissions, characterized in that: include: Acquire the remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp; Based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration is cleaned for the remote transmission data to obtain target data; Based on the vehicle speed, the target data is divided into a plurality of operating condition intervals; wherein each operating condition interval is a vehicle speed interval; Calculate the operating emission factor for each operating range; wherein the operating emission factor represents the NO in the operating range X The emission rate; Based on the operating condition emission factor and the engine load, calculating the load emission factor of each operating condition interval in different load intervals; Determining an emission result of the target vehicle based on the load emission factor and the operating condition emission factor; The determining of the emission result of the target vehicle based on the load emission factor and the operating condition emission factor includes: Determine the emission result of the target vehicle based on the load emission factor of the current driving cycle of the target vehicle and the load emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes; The determining of the emission result of the target vehicle based on the load emission factor of the current driving cycle and the load emission factor of the previous driving cycle of the target vehicle comprises: Calculating a second difference between the load emission factor of each engine load interval of the current driving cycle and the load emission factor of the load interval corresponding to the previous driving cycle; wherein the load emission factor of the engine load interval is obtained by weighted summation of the load emission factors of all operating condition intervals corresponding to the engine load interval; Acquire a second abnormal load emission factor when the second difference is greater than a second difference threshold; wherein the second difference threshold is positively correlated with the load emission factor of the previous driving cycle; If the number of the second abnormal load emission factors is greater than a second number threshold, determining that the emission of the target vehicle exceeds the standard; The calculation formula of the load emission factor in the engine load range is: ； in, is the load emission factor of the mth load interval, is the load emission factor of the ith speed interval under the mth load interval, m is the total number of load intervals, R Lm-Vi It is the time proportion of the ith speed interval in the entire target data under the mth load interval.

3. A remote diagnosis method for vehicle emissions, characterized in that: include: Acquire the remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp; Based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration is cleaned for the remote transmission data to obtain target data; Based on the vehicle speed, the target data is divided into a plurality of operating condition intervals; wherein each operating condition interval is a vehicle speed interval; Calculate the operating emission factor for each operating range; wherein the operating emission factor represents the NO in the operating range X The emission rate; Based on the operating condition emission factor and the engine load, calculating the load emission factor of each operating condition interval in different load intervals; Determining an emission result of the target vehicle based on the load emission factor and the operating condition emission factor; The determining of the emission result of the target vehicle based on the load emission factor and the operating condition emission factor includes: Determine the emission result of the target vehicle based on the operating emission factor of the current driving cycle and the operating emission factor of the previous driving cycle of the target vehicle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes; The determining of the emission result of the target vehicle based on the operating condition emission factor of the current driving cycle of the target vehicle and the operating condition emission factor of the previous driving cycle includes: Calculating a third difference between the operating emission factor of the current driving cycle and the operating emission factor of the previous driving cycle; wherein the operating emission factor of the current driving cycle is obtained by weighted summation of the operating emission factors of all operating intervals of the current driving cycle, and the third difference is positively correlated with the operating emission factor of the previous driving cycle; wherein the calculation formula of the operating emission factor of the current driving cycle is: ； in, is the emission factor of the current driving cycle, E Vi-NOx For the i The emission factor for the operating conditions in the speed range is: R Vi For the i The time proportion of each speed interval in the target data; If the third difference is greater than a third difference threshold, it is determined that the emission of the target vehicle exceeds the standard.

4. A remote diagnostic device for vehicle emissions, characterized in that: include: The remote data acquisition module is used to acquire the remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp; The target data acquisition module is used to obtain the target data based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration is cleaned for the remote transmission data to obtain target data; A working condition interval division module, used to divide the target data into a plurality of working condition intervals based on the vehicle speed; wherein each of the working condition intervals is a vehicle speed interval; The operating condition factor calculation module is used to calculate the operating condition emission factor of each operating condition interval; wherein the operating condition emission factor represents the NO in the operating condition interval X The emission rate; A load factor calculation module, used to calculate the load emission factor of each operating condition interval in different load intervals based on the operating condition emission factor and the engine load; An emission result determination module, used to determine the emission result of the target vehicle based on the load emission factor and the operating condition emission factor; The emission result determination module is further configured as follows: Calculating a first difference between a load emission factor of a current driving cycle and a load emission factor of a load interval and a working condition interval corresponding to a previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes; Acquire a first abnormal load emission factor when the first difference is greater than a first difference threshold; wherein the first difference threshold is positively correlated with the load emission factor of the previous driving cycle; If the number of the first abnormal load emission factors is greater than a first number threshold, it is determined that the emission of the target vehicle exceeds the standard.

5. A remote diagnostic device for vehicle emissions, characterized in that: include: The remote data acquisition module is used to acquire the remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp; The target data acquisition module is used to obtain the target data based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration is cleaned for the remote transmission data to obtain target data; A working condition interval division module, used to divide the target data into a plurality of working condition intervals based on the vehicle speed; wherein each of the working condition intervals is a vehicle speed interval; The operating condition factor calculation module is used to calculate the operating condition emission factor of each operating condition interval; wherein the operating condition emission factor represents the NO in the operating condition interval X The emission rate; A load factor calculation module, used to calculate the load emission factor of each operating condition interval in different load intervals based on the operating condition emission factor and the engine load; An emission result determination module, used to determine the emission result of the target vehicle based on the load emission factor and the operating condition emission factor; The emission result determination module is further configured as follows: Calculating a second difference between a load emission factor of each engine load interval of a current driving cycle and a load emission factor of a corresponding load interval of a previous driving cycle; wherein both the current driving cycle and the previous driving cycle are continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes; and the load emission factor of the engine load interval is obtained by weighted summation of load emission factors of all operating condition intervals corresponding to the engine load interval; Acquire a second abnormal load emission factor when the second difference is greater than a second difference threshold; wherein the second difference threshold is positively correlated with the load emission factor of the previous driving cycle; If the number of the second abnormal load emission factors is greater than a second number threshold, determining that the emission of the target vehicle exceeds the standard; The calculation formula of the load emission factor in the engine load range is: ； in, is the load emission factor of the mth load interval, is the load emission factor of the ith speed interval under the mth load interval, m is the total number of load intervals, R Lm-Vi It is the time proportion of the ith speed interval in the entire target data under the mth load interval.

6. A remote diagnostic device for vehicle emissions, characterized in that: include: The remote data acquisition module is used to acquire the remote transmission data of the target vehicle; wherein the remote transmission data includes the vehicle speed, engine speed, engine fuel flow, intake volume, NO X The emission concentration and coolant temperature of the remote transmission data include a timestamp; The target data acquisition module is used to obtain the target data based on the engine speed, the vehicle speed, the coolant temperature and the NO X The emission concentration is cleaned for the remote transmission data to obtain target data; A working condition interval division module, used to divide the target data into a plurality of working condition intervals based on the vehicle speed; wherein each of the working condition intervals is a vehicle speed interval; The operating condition factor calculation module is used to calculate the operating condition emission factor of each operating condition interval; wherein the operating condition emission factor represents the NO in the operating condition interval X The emission rate; A load factor calculation module, used to calculate the load emission factor of each operating condition interval in different load intervals based on the operating condition emission factor and the engine load; An emission result determination module, used to determine the emission result of the target vehicle based on the load emission factor and the operating condition emission factor; The emission result determination module is further configured as follows: Calculate a third difference between the operating emission factor of the current driving cycle and the operating emission factor of the previous driving cycle; wherein the current driving cycle and the previous driving cycle are both continuous trips with a mileage of not less than 2 kilometers and a duration of not less than 10 minutes; the operating emission factor of the current driving cycle is obtained by weighted summation of the operating emission factors of all operating intervals of the current driving cycle, and the third difference is positively correlated with the operating emission factor of the previous driving cycle; wherein the calculation formula of the operating emission factor of the current driving cycle is: ； in, is the emission factor of the current driving cycle, E Vi-NOx For the i The emission factor for the operating conditions in the speed range is: R Vi For the i The time proportion of each speed interval in the target data; If the third difference is greater than a third difference threshold, it is determined that the emission of the target vehicle exceeds the standard.

7. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to execute the method according to any one of claims 1 to 3.

8. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is used to execute the method described in any one of claims 1 to 3.

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