Tail gas emission monitoring method and related equipment

Abstract

The invention relates to a tail gas emission monitoring method and related equipment. The method comprises the following steps: acquiring diagnosis interface data; judging whether tail gas emission monitoring conditions are met or not according to the diagnosis interface data; under the condition that the tail gas emission monitoring condition is met, a plurality of tail gas concentration values collected within a first preset duration are obtained; and performing tail gas emission monitoring at least according to the tail gas concentration value. According to the invention, the diagnosis interface data is acquired to monitor the exhaust gas emission, PEMS equipment is not needed, the exhaust gas emission is monitored according to the exhaust gas concentration values collected within the first preset time, the test time can be adjusted according to the first preset time, and the exhaust gas emission is monitored conveniently and quickly.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas emission monitoring, and in particular to a tail gas emission monitoring method and related equipment. Background Art

[0002] Currently, the PEMS (Portable Emissions Measurement System) test method is often used to detect the emission level of mechanical equipment under actual working conditions. The PEMS test method is to install the exhaust emission detection equipment on road vehicles or non-road mechanical equipment, and conduct emission tests on actual roads or actual operating scenarios according to certain load requirements. However, according to the PEMS test method, each test takes at least 2 hours, the test cycle is long, and the test data processing method is complicated and not convenient enough. Summary of the invention

[0003] The present invention provides a tail gas emission monitoring method and related equipment, which can reduce the complexity of tail gas emission monitoring and improve the convenience of emission monitoring.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides a method for monitoring exhaust gas emissions, comprising:

[0006] Get diagnostic interface data;

[0007] Determining whether exhaust emission monitoring conditions are met according to the diagnostic interface data;

[0008] When the exhaust emission monitoring condition is met, obtaining multiple exhaust gas concentration values ​​collected within a first preset time period;

[0009] The tail gas emission monitoring is performed at least according to the tail gas concentration value.

[0010] Optionally, the performing tail gas emission monitoring at least according to the tail gas concentration value includes:

[0011] Calculating an average value of a plurality of exhaust gas concentration values ​​collected within the first preset time period;

[0012] When the average value of the exhaust gas concentration values ​​is not greater than the preset concentration average value, it is determined that the exhaust gas emissions are qualified; when the average value of the exhaust gas concentration values ​​is greater than the preset concentration average value, it is determined that the exhaust gas emissions are unqualified.

[0013] Optionally, the performing tail gas emission monitoring at least according to the tail gas concentration value includes:

[0014] Calculating the total exhaust gas emission mass within the first preset time period according to the exhaust gas concentration value, engine intake volume and fuel injection volume collected within the first preset time period;

[0015] Calculating the total output power of the engine within the first preset time period according to the engine speed and torque collected within the first preset time period;

[0016] The ratio of the total exhaust gas emission mass to the total output power of the engine is taken as the average exhaust gas specific emission value;

[0017] When the average specific emission value of the exhaust gas is not greater than the preset specific emission value, it is determined that the exhaust gas emissions are qualified; when the average specific emission value of the exhaust gas is greater than the preset specific emission value, it is determined that the exhaust gas emissions are unqualified.

[0018] Optionally, judging whether exhaust emission monitoring conditions are met according to the diagnostic interface data includes:

[0019] Calculating the average engine power percentage according to the engine speed and torque collected during the first preset time period;

[0020] If the engine average power percentage is greater than a preset percentage, the exhaust emission monitoring condition is met;

[0021] If the engine average power percentage is not greater than the preset percentage, the exhaust emission monitoring condition is not met.

[0022] Optionally, judging whether exhaust emission monitoring conditions are met according to the diagnostic interface data includes:

[0023] Before acquiring the multiple exhaust gas concentration values ​​collected within the first preset time period, if the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal, then the exhaust gas emission monitoring condition is met;

[0024] If the engine water temperature is not greater than the preset water temperature and / or the exhaust gas concentration acquisition signal is an invalid signal, the exhaust emission monitoring condition is not met.

[0025] Optionally, judging whether exhaust emission monitoring conditions are met according to the diagnostic interface data includes:

[0026] If no on-board diagnostic fault signal is collected within the first preset time period and the exhaust gas concentration collection signal is a valid signal, the exhaust gas emission monitoring condition is met;

[0027] If the vehicle-mounted diagnostic fault signal is collected within the first preset time period and / or the exhaust gas concentration collection signal is an invalid signal for a duration exceeding a second preset time period, the exhaust emission monitoring condition is not met;

[0028] The second preset duration is shorter than the first preset duration.

[0029] Optionally, judging whether exhaust emission monitoring conditions are met according to the diagnostic interface data includes:

[0030] When the engine water temperature is greater than the preset water temperature, if the engine idle time does not exceed the third preset time and the engine idling time does not exceed the fourth preset time, the exhaust emission monitoring condition is met;

[0031] If the duration of the engine idling exceeds the third preset duration and / or the duration of the engine idling exceeds the fourth preset duration, the exhaust emission monitoring condition is not met;

[0032] The third preset time length and the fourth preset time length are both shorter than the first preset time length.

[0033] The present invention also provides an exhaust emission monitoring system, comprising:

[0034] A data acquisition module, used for acquiring diagnostic interface data;

[0035] A judgment module, used to judge whether the exhaust emission monitoring conditions are met according to the diagnostic interface data;

[0036] A concentration acquisition module, used to acquire a plurality of exhaust gas concentration values ​​collected within a first preset time period when the exhaust gas emission monitoring condition is met;

[0037] The emission monitoring module is used to monitor exhaust emissions at least according to the exhaust gas concentration value.

[0038] The present invention also provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the exhaust emission monitoring method as described above is implemented.

[0039] The present invention also provides an electronic device, comprising:

[0040] At least one processor, and at least one memory and bus connected to the processor;

[0041] The processor and the memory communicate with each other via the bus; the processor is used to call program instructions in the memory to execute the exhaust emission monitoring method as described above.

[0042] It can be seen from the above technical scheme that the present invention discloses a method for monitoring exhaust gas emissions and related equipment, which obtains diagnostic interface data; determines whether exhaust gas emission monitoring conditions are met; when the diagnostic interface data meets the exhaust gas emission monitoring conditions, obtains multiple exhaust gas concentration values ​​collected within a first preset time period; and performs exhaust gas emission monitoring at least according to the exhaust gas concentration value. The present invention obtains diagnostic interface data for exhaust gas emission monitoring, and PEMS equipment may not be used. In addition, the present invention performs exhaust gas emission monitoring based on multiple exhaust gas concentration values ​​collected within a first preset time period, and the test duration can be adjusted according to the first preset time period, so as to realize convenient and quick exhaust emission monitoring.

[0043] Of course, any product or method implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A flow chart of a method for monitoring exhaust gas emissions provided by an embodiment of the present invention;

[0046] Figure 2 A structural diagram of an exhaust emission monitoring system provided by an embodiment of the present invention;

[0047] Figure 3 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present invention provides a method for monitoring tail gas emissions. Figure 1 As shown, the method comprises:

[0050] Step 101: Obtain diagnostic interface data.

[0051] The diagnostic interface can be an OBD (On-Board Diagnostics) diagnostic interface of the engine ECU (Electronic Control Unit). The diagnostic interface data may include but is not limited to OBD fault codes, engine water temperature, exhaust gas concentration, engine air intake, engine fuel injection, engine speed, and engine torque. Among them, the exhaust gas concentration can be a NOx concentration, that is, a nitrogen oxide concentration. The NOx concentration can be obtained through a diagnostic interface, or through a PEMS device installed in the exhaust tail pipe, or through a device that can measure the NOx concentration. The engine torque can be obtained through a diagnostic interface, or it can be calculated through torque percentage, friction torque percentage and reference torque. The present invention directly reads data from the diagnostic interface when monitoring exhaust emissions, without using PEMS equipment, so it is not necessary to perform exhaust emission monitoring according to the PEMS test method, thereby improving the convenience of emission monitoring.

[0052] The timing for acquiring the diagnostic interface data can be to read from the OBD diagnostic interface of the engine ECU when the ignition switch of the road vehicle or non-road mechanical equipment is in the ON position but not started, that is, it can be read from the OBD diagnostic interface of the engine ECU when the road vehicle or non-road mechanical equipment is in the powered-on state. The timing for acquiring the diagnostic interface data can also be to read from the OBD diagnostic interface of the engine ECU after starting the engine. Of course, the timing for acquiring the diagnostic interface data can also be to read after the engine water temperature exceeds a certain temperature value. The present invention is not limited here.

[0053] There are many types of parameters in the diagnostic interface data. The data acquisition of various parameters can be collected at a certain frequency, wherein the collection frequency can be determined according to the exhaust emission monitoring requirements, for example, a frequency greater than 1 Hz can be used for collection. In addition, the collection time of each parameter can be synchronized.

[0054] Step 102: Determine whether exhaust emission monitoring conditions are met based on the diagnostic interface data.

[0055] The exhaust emission monitoring conditions may include but are not limited to: the engine water temperature is greater than the preset water temperature, the diagnostic interface data is a valid value, the engine is not idle or idling for a long time, no OBD fault occurs, the engine average power percentage is greater than a preset percentage, etc. Among them, the OBD fault can be a fault diagnosed by the engine ECU that affects the exhaust emission or finds abnormal exhaust emission.

[0056] Step 103: When the exhaust emission monitoring conditions are met, a plurality of exhaust gas concentration values ​​collected within a first preset time period are obtained.

[0057] As an optional implementation, judging whether the exhaust emission monitoring conditions are met according to the diagnostic interface data includes:

[0058] Before acquiring a plurality of exhaust gas concentration values ​​collected within a first preset time period, if the engine water temperature is greater than a preset water temperature and the exhaust gas concentration collection signal is a valid signal, then the exhaust gas emission monitoring condition is met;

[0059] If the engine water temperature is not greater than the preset water temperature and / or the exhaust gas concentration collection signal is an invalid signal, the exhaust emission monitoring conditions are not met.

[0060] After starting the engine, ensure that the non-road machinery and equipment is not disturbed in any way and starts operating in accordance with the normal operating mode and the driver's daily driving habits. After the engine is started, the water temperature will rise. When the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal, the exhaust emission monitoring conditions are met. At this time, the timing can be started. The timing duration can be the first preset duration, and then multiple exhaust gas concentration values ​​collected within the first preset duration are obtained.

[0061] The exhaust gas concentration may be a NOx concentration. Since the NOx concentration detection usually requires initialization, preparation and other processes, the exhaust gas concentration acquisition signal transmitted during this process may be an invalid signal, which may be FF, while the valid signal may be non-FF. If the exhaust gas concentration acquisition signal is an invalid signal, the exhaust emission monitoring conditions are not met. At this time, the timing will not start until the engine water temperature is greater than the preset water temperature and the exhaust gas concentration acquisition signal transmits a valid signal.

[0062] As an optional implementation, judging whether the exhaust emission monitoring conditions are met according to the diagnostic interface data further includes:

[0063] If no on-board diagnostic fault signal is collected within the first preset time period and the exhaust gas concentration collection signal is a valid signal, the exhaust emission monitoring condition is met;

[0064] If the vehicle diagnostic fault signal and / or the exhaust gas concentration collection signal are collected within the first preset time period and the duration of the invalid signal exceeds the second preset time period, the exhaust emission monitoring condition is not met;

[0065] The second preset time length is shorter than the first preset time length.

[0066] When the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal and the timing starts, if no on-board diagnostic fault signal is collected within the first preset time period and the exhaust gas concentration collection signal is a valid signal, the exhaust emission monitoring conditions are met and multiple exhaust gas concentration values ​​collected within the first preset time period can be obtained.

[0067] When the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal and starts timing, and an OBD fault occurs during the timing period before reaching the first preset duration, that is, an on-board diagnostic fault signal is collected, then this exhaust emission monitoring cycle is invalid, and the data collected after timing will not be processed for exhaust emission monitoring. The diagnostic interface data can be obtained again after the OBD fault problem is resolved, and it can be determined whether the exhaust emission monitoring conditions are met based on the diagnostic interface data.

[0068] When the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal and the timing starts, and the exhaust gas concentration collection signal is an invalid signal during the timing time before reaching the first preset time, and the cumulative time of the invalid signal exceeds the second preset time, the exhaust emission monitoring test can be terminated, and the exhaust emission monitoring cycle is invalid. The data collected after the timing is not processed for exhaust emission monitoring. The second preset time is shorter than the first preset time. In actual application, the second preset time is shorter than the remaining time until the end of the timing. The second preset time can be in the second level, while the first preset time can be in the minute level.

[0069] As an optional implementation, judging whether the exhaust emission monitoring conditions are met according to the diagnostic interface data further includes:

[0070] When the engine water temperature is greater than the preset water temperature, if the engine idle time does not exceed the third preset time and the engine idling time does not exceed the fourth preset time, the exhaust emission monitoring condition is met;

[0071] If the duration of the engine idling exceeds the third preset duration and / or the duration of the engine idling exceeds the fourth preset duration, the exhaust emission monitoring condition is not met;

[0072] Among them, the third preset time length and the fourth preset time length are both shorter than the first preset time length.

[0073] When monitoring exhaust emissions, the load of the mechanical equipment is equivalent to or higher than the normal operating mode. The load of the mechanical equipment shall not be significantly lower than the normal operating mode, and shall not be kept idling or running for a long time.

[0074] When the engine water temperature is greater than the preset water temperature, timing can start. During the first preset timing period, the engine idling time or the cumulative idling time does not exceed the third preset time, and the engine idling time or the cumulative idling time does not exceed the fourth preset time. The exhaust emission monitoring conditions are met and exhaust emissions can be monitored based on the exhaust concentration value within the first preset time.

[0075] When the engine water temperature is greater than the preset water temperature, the timing can be started. Within the first preset duration of the timing, if the duration of one engine idle speed or the cumulative idle speed duration does not exceed the third preset duration, and the duration of one engine idling or the cumulative idling duration does not exceed the fourth preset duration, the exhaust emission monitoring test can be terminated, and this exhaust emission monitoring cycle is invalid, and the data collected after the timing is not processed for exhaust emission monitoring. The third preset duration and the fourth preset duration are both shorter than the first preset duration. In actual applications, the third preset duration and the fourth preset duration are both shorter than the remaining time until the end of the timing. The third preset duration and the fourth preset duration can be in the second level, while the first preset duration can be in the minute level.

[0076] As an optional implementation, judging whether the exhaust emission monitoring conditions are met according to the diagnostic interface data further includes:

[0077] Calculating an average engine power percentage based on the engine speed and torque collected within a first preset time period;

[0078] If the average engine power percentage is greater than the preset percentage, the exhaust emission monitoring condition is met;

[0079] If the average engine power percentage is not greater than the preset percentage, the exhaust emission monitoring conditions are not met.

[0080] If the average engine power percentage is greater than the preset percentage, the exhaust emission monitoring test is valid and exhaust emission monitoring can be performed based on the exhaust concentration value within the first preset time. If the average engine power percentage is not greater than the preset percentage, this exhaust emission monitoring cycle is invalid and the data collected after the timing is not processed for exhaust emission monitoring.

[0081] Optionally, calculating the average engine power percentage based on the engine speed and torque collected within the first preset time period includes:

[0082] Acquire multiple engine speeds and multiple torques collected within the first preset time period;

[0083] Calculate the real-time engine power based on the engine speed and torque collected at the same time point;

[0084] The ratio of the real-time power of the engine to the rated power of the engine is taken as the engine power percentage;

[0085] An average value of a plurality of the engine power percentages within the first preset time period is calculated to obtain the engine average power percentage.

[0086] Among them, the engine rated power can be found from the engine nameplate or product certification documents.

[0087] When the exhaust gas emission monitoring conditions are met, the present invention obtains multiple exhaust gas concentration values ​​collected within a first preset time period, and the test duration of the exhaust gas emission monitoring can be adjusted according to the first preset time period, thereby realizing rapid monitoring of exhaust gas emissions.

[0088] Step 104: Perform exhaust emission monitoring at least according to the exhaust gas concentration value.

[0089] When monitoring exhaust emissions, if the average engine power percentage is not less than a preset percentage, the exhaust emissions can be determined based on the exhaust concentration value, that is, whether the exhaust emissions exceed the standard. It can also be determined based on the exhaust average specific emission value, or it can be determined based on the exhaust concentration value and the exhaust average specific emission value. Among them, the exhaust concentration value can be the NOx concentration.

[0090] As an optional implementation, tail gas emission monitoring is performed at least according to the tail gas concentration value, including:

[0091] Calculating an average value of multiple exhaust gas concentration values ​​collected within a first preset time period;

[0092] When the average value of the exhaust gas concentration values ​​is not greater than the preset concentration average value, the exhaust gas emissions are determined to be qualified; when the average value of the exhaust gas concentration values ​​is greater than the preset concentration average value, the exhaust gas emissions are determined to be unqualified.

[0093] The unit of the exhaust gas concentration value may be ppm.

[0094] As an optional implementation, tail gas emission monitoring is performed at least according to the tail gas concentration value, including:

[0095] Calculating the total exhaust gas emission mass within the first preset time period according to the exhaust gas concentration value, the engine intake volume and the fuel injection volume collected within the first preset time period;

[0096] Calculating the total output power of the engine within the first preset time period according to the engine speed and torque collected within the first preset time period;

[0097] The ratio of the total exhaust emission mass to the total engine output power is taken as the average exhaust emission value;

[0098] When the average specific emission value of the exhaust gas is not greater than the preset specific emission value, the exhaust gas emissions are determined to be qualified; when the average specific emission value of the exhaust gas is greater than the preset specific emission value, the exhaust gas emissions are determined to be unqualified.

[0099] Among them, the unit of the exhaust gas average specific emission value can be g / kWh, the unit of the total exhaust gas emission mass can be g, and the unit of the total engine output power can be kWh.

[0100] As an optional implementation, tail gas emission monitoring is performed at least according to the tail gas concentration value, including:

[0101] The exhaust emissions are determined to be qualified when the average exhaust concentration value is not greater than the preset concentration average value and the average exhaust emission ratio value is not greater than the preset emission ratio value; the exhaust emissions are determined to be unqualified when the average exhaust concentration value is greater than the preset concentration average value and / or the average exhaust emission ratio value is greater than the preset emission ratio value.

[0102] The present invention obtains diagnostic interface data to monitor exhaust emissions, and PEMS equipment may not be used. In addition, the present invention monitors exhaust emissions based on multiple exhaust gas concentration values ​​collected within a first preset time period, and the test duration can be adjusted according to the first preset time period. Monitoring exhaust emissions based on exhaust gas concentration values ​​can reduce the complexity of exhaust emission monitoring and achieve convenient and quick exhaust emission monitoring.

[0103] The present invention also provides a tail gas emission monitoring system, such as Figure 2 As shown, the system comprises:

[0104] The data acquisition module 201 is used to acquire the diagnostic interface data.

[0105] The judgment module 202 is used to judge whether the exhaust emission monitoring conditions are met according to the diagnostic interface data.

[0106] The judgment module 202 is specifically used to calculate the average engine power percentage based on the engine speed and torque collected within the first preset time period; if the average engine power percentage is greater than the preset percentage, the exhaust emission monitoring condition is met; if the average engine power percentage is not greater than the preset percentage, the exhaust emission monitoring condition is not met.

[0107] The judgment module 202 is also used to, before obtaining multiple exhaust gas concentration values ​​collected within a first preset time period, if the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal, then the exhaust emission monitoring condition is met; if the engine water temperature is not greater than the preset water temperature and / or the exhaust gas concentration collection signal is an invalid signal, then the exhaust emission monitoring condition is not met.

[0108] The judgment module 202 is also used to satisfy the exhaust emission monitoring condition if the on-board diagnostic fault signal is not collected within a first preset time period and the exhaust gas concentration collection signal is a valid signal; if the on-board diagnostic fault signal and / or the exhaust gas concentration collection signal is an invalid signal and the duration exceeds a second preset time period, the exhaust emission monitoring condition is not satisfied; wherein the second preset time period is shorter than the first preset time period.

[0109] The judgment module 202 is also used to determine that, when the engine water temperature is greater than the preset water temperature, if the engine idle time does not exceed a third preset time and the engine idling time does not exceed a fourth preset time, the exhaust emission monitoring condition is met; if the engine idle time exceeds the third preset time and / or the engine idling time exceeds the fourth preset time, the exhaust emission monitoring condition is not met; wherein the third preset time and the fourth preset time are both shorter than the first preset time.

[0110] The concentration acquisition module 203 is used to acquire a plurality of exhaust gas concentration values ​​collected within a first preset time period when the exhaust gas emission monitoring conditions are met.

[0111] The emission monitoring module 204 is used to monitor exhaust emissions at least according to the exhaust concentration value.

[0112] The emission monitoring module 204 is specifically used to calculate the average value of multiple exhaust gas concentration values ​​collected within a first preset time period; when the average value of the exhaust gas concentration value is not greater than the preset concentration average value, the exhaust gas emissions are determined to be qualified; when the average value of the exhaust gas concentration value is greater than the preset concentration average value, the exhaust gas emissions are determined to be unqualified.

[0113] The emission monitoring module 204 is also used to calculate the total exhaust emission mass within the first preset time period based on the exhaust concentration value, engine intake volume and fuel injection volume collected within the first preset time period; calculate the total engine output power within the first preset time period based on the engine speed and torque collected within the first preset time period; use the ratio of the total exhaust emission mass to the total engine output power as the average exhaust emission ratio value; determine that the exhaust emissions are qualified when the average exhaust emission ratio value is not greater than the preset exhaust emission ratio value, and determine that the exhaust emissions are unqualified when the average exhaust emission ratio value is greater than the preset exhaust emission ratio value.

[0114] An embodiment of the present invention provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the above-mentioned exhaust emission monitoring method is implemented.

[0115] An embodiment of the present invention provides an electronic device, such as Figure 3 As shown, the electronic device 30 includes at least one processor 301, at least one memory 302 and a bus 303 connected to the processor 301; wherein the processor 301 and the memory 302 communicate with each other through the bus 303; the processor 301 is used to call the program instructions in the memory 302 to execute the above-mentioned exhaust emission monitoring method. The electronic device in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0116] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the steps included in the above-mentioned exhaust emission monitoring method.

[0117] The present application is described with reference to the flowcharts and / or block diagrams of the methods, systems and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] In a typical configuration, the device includes one or more processors (CPU), memory and bus. The device may also include input / output interface, network interface and the like.

[0119] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.

[0120] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0121] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0122] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0123] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0124] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for monitoring exhaust emissions, It is characterized in that include: Get diagnostic interface data; Determining whether exhaust emission monitoring conditions are met according to the diagnostic interface data; When the exhaust emission monitoring condition is met, obtaining multiple exhaust gas concentration values ​​collected within a first preset time period; The tail gas emission monitoring is performed at least according to the tail gas concentration value.

2. The exhaust emission monitoring method according to claim 1, It is characterized in that The monitoring of exhaust gas emissions at least according to the exhaust gas concentration value comprises: Calculating an average value of a plurality of exhaust gas concentration values ​​collected within the first preset time period; When the average value of the exhaust gas concentration values ​​is not greater than the preset concentration average value, it is determined that the exhaust gas emissions are qualified; when the average value of the exhaust gas concentration values ​​is greater than the preset concentration average value, it is determined that the exhaust gas emissions are unqualified.

3. The exhaust emission monitoring method according to claim 1 or 2, It is characterized in that The monitoring of exhaust gas emissions at least according to the exhaust gas concentration value comprises: Calculating the total exhaust gas emission mass within the first preset time period according to the exhaust gas concentration value, engine intake volume and fuel injection volume collected within the first preset time period; Calculating the total output power of the engine within the first preset time period according to the engine speed and torque collected within the first preset time period; The ratio of the total exhaust gas emission mass to the total output power of the engine is taken as the average exhaust gas specific emission value; When the average specific emission value of the exhaust gas is not greater than the preset specific emission value, it is determined that the exhaust gas emissions are qualified; when the average specific emission value of the exhaust gas is greater than the preset specific emission value, it is determined that the exhaust gas emissions are unqualified.

4. The exhaust emission monitoring method according to claim 1, It is characterized in that The determining whether the exhaust emission monitoring condition is met according to the diagnostic interface data includes: Calculating the average engine power percentage according to the engine speed and torque collected during the first preset time period; If the engine average power percentage is greater than a preset percentage, the exhaust emission monitoring condition is met; If the engine average power percentage is not greater than the preset percentage, the exhaust emission monitoring condition is not met.

5. The exhaust emission monitoring method according to claim 1, It is characterized in that The determining whether the exhaust emission monitoring condition is met according to the diagnostic interface data includes: Before acquiring the multiple exhaust gas concentration values ​​collected within the first preset time period, if the engine water temperature is greater than the preset water temperature and the exhaust gas concentration collection signal is a valid signal, then the exhaust gas emission monitoring condition is met; If the engine water temperature is not greater than the preset water temperature and / or the exhaust gas concentration acquisition signal is an invalid signal, the exhaust emission monitoring condition is not met.

6. The exhaust emission monitoring method according to claim 1, It is characterized in that The determining whether the exhaust emission monitoring condition is met according to the diagnostic interface data includes: If no on-board diagnostic fault signal is collected within the first preset time period and the exhaust gas concentration collection signal is a valid signal, the exhaust gas emission monitoring condition is met; If the vehicle-mounted diagnostic fault signal is collected within the first preset time period and / or the exhaust gas concentration collection signal is an invalid signal for a duration exceeding a second preset time period, the exhaust emission monitoring condition is not met; The second preset duration is shorter than the first preset duration.

7. The exhaust emission monitoring method according to claim 1, It is characterized in that The determining whether the exhaust emission monitoring condition is met according to the diagnostic interface data includes: When the engine water temperature is greater than the preset water temperature, if the engine idle time does not exceed the third preset time and the engine idling time does not exceed the fourth preset time, the exhaust emission monitoring condition is met; If the duration of the engine idling exceeds the third preset duration and / or the duration of the engine idling exceeds the fourth preset duration, the exhaust emission monitoring condition is not met; The third preset time length and the fourth preset time length are both shorter than the first preset time length.

8. An exhaust emission monitoring system, It is characterized in that include: A data acquisition module, used for acquiring diagnostic interface data; A judgment module, used to judge whether the exhaust emission monitoring conditions are met according to the diagnostic interface data; A concentration acquisition module, used to acquire a plurality of exhaust gas concentration values ​​collected within a first preset time period when the exhaust gas emission monitoring condition is met; The emission monitoring module is used to monitor exhaust emissions at least according to the exhaust gas concentration value.

9. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores a program, and when the program is executed by the processor, the exhaust emission monitoring method according to any one of claims 1 to 7 is implemented.

10. An electronic device, It is characterized in that include: At least one processor, and at least one memory and bus connected to the processor; The processor and the memory communicate with each other via the bus; The processor is used to call the program instructions in the memory to execute the exhaust emission monitoring method described in any one of claims 1-7.

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