Control method, device, medium and system for urea injection system of diesel vehicle

Abstract

The invention provides a control method, device, medium and system for a urea injection system of a diesel vehicle. The method comprises the steps that the environment temperature and the environment pressure of the environment where the diesel vehicle is located are obtained, and the current environment temperature and the current environment pressure are obtained; first suck-back emptying operation or second suck-back emptying operation is executed at least according to the current environment temperature and the current environment pressure, the first suck-back emptying operation is the suck-back emptying operation conducted according to preset time, and the second suck-back emptying operation is the suck-back emptying operation conducted according to the preset time. The duration of the suck-back emptying operation in the second suck-back emptying operation is smaller than the duration of the suck-back emptying operation in the first suck-back emptying operation; and determining a first recording time length, and determining whether to execute a one-key remote suck-back operation according to the first recording time length and a suck-back emptying operation execution result. The problem that a nozzle and a pipeline are corroded by high-temperature waste gas in an exhaust pipe due to long-time suck-back emptying even if enough time is reserved to cut off total power of an existing diesel vehicle is solved.

Description

Technical Field

[0001] The present application relates to the technical field of exhaust gas aftertreatment, and in particular, to a control method for a urea injection system of a diesel vehicle, a control device for a urea injection system of a diesel vehicle, a computer-readable storage medium, and a diesel vehicle system. Background Art

[0002] Existing diesel vehicles are all equipped with a urea injection system, which is used to inject urea into the tailpipe to carry out a chemical reaction with nitrogen oxides in the exhaust gas, thereby reducing pollutants in the exhaust gas. In order to prevent the urea solution from remaining in the pipeline and freezing, causing the pipeline to burst, current diesel vehicles require 30 - 90 s for the reverse suction and evacuation operation of the urea injection system between turning off the engine and cutting off the main power. However, many drivers, regardless of the ambient temperature, sometimes directly turn off the engine and cut off the main power, without performing the reverse suction and evacuation operation. But even if enough time is left to cut off the main power according to the current strategy, there will still be a problem that the long-time reverse suction and evacuation will cause the high-temperature exhaust gas in the exhaust pipe to corrode the nozzle and the pipeline. Summary of the Invention

[0003] The main purpose of the present application is to provide a control method for a urea injection system of a diesel vehicle, a control device for a urea injection system of a diesel vehicle, a computer-readable storage medium, and a diesel vehicle system, so as to at least solve the problem that even if enough time is left to cut off the main power for existing diesel vehicles, there will still be a problem that the long-time reverse suction and evacuation will cause the high-temperature exhaust gas in the exhaust pipe to corrode the nozzle and the pipeline.

[0004] To achieve the above object, according to one aspect of the present application, there is provided a control method for a urea injection system of a diesel vehicle, the method including: obtaining the ambient temperature and ambient pressure of the diesel vehicle to obtain the current ambient temperature and the current ambient pressure; performing a first reverse suction and evacuation operation or a second reverse suction and evacuation operation at least according to the current ambient temperature and the current ambient pressure, where the first reverse suction and evacuation operation is a reverse suction and evacuation operation performed according to a preset time, and the duration of the reverse suction and evacuation operation in the second reverse suction and evacuation operation is less than the duration of the reverse suction and evacuation operation in the first reverse suction and evacuation operation; determining a first recording duration, and determining whether to perform a one-key remote reverse suction operation according to the first recording duration and the execution result of the reverse suction and evacuation operation, where the first recording duration is the duration between the diesel vehicle turning off the engine and cutting off the main power, the one-key remote reverse suction operation represents that when the diesel vehicle is started next time, controlling the urea injection system to perform a clearing process, and the execution result of the reverse suction and evacuation operation is the execution result of performing the first reverse suction and evacuation operation or the second reverse suction and evacuation operation.

[0005] Optionally, perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, including: performing the second back-suction evacuation operation when the current ambient temperature is greater than or equal to the temperature threshold and the current ambient pressure is greater than or equal to the pressure threshold; performing the first back-suction evacuation operation when the current ambient temperature is less than the temperature threshold and / or the current ambient pressure is less than the pressure threshold.

[0006] Optionally, perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, including: performing the second back-suction evacuation operation when the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle; performing the first back-suction evacuation operation when a first preset condition is satisfied, and the first preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, and it is determined that the urea heating and thawing request has been received during the current driving cycle.

[0007] Optionally, perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, including: performing the second back-suction evacuation operation when the latitude information of the diesel vehicle is less than the latitude threshold, the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle; performing the first back-suction evacuation operation when a second preset condition is satisfied, and the second preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, it is determined that the urea heating and thawing request has been received during the current driving cycle, and the latitude information of the diesel vehicle is greater than or equal to the latitude threshold.

[0008] Optionally, determining whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction evacuation operation includes: determining a minimum time limit value corresponding to the execution result of the back-suction evacuation operation; determining to perform the one-key remote back-suction operation when the first recording duration is greater than or equal to the minimum time limit value; determining that there is no need to perform the one-key remote back-suction operation when the first recording duration is less than the minimum time limit value and the execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation; determining that there is no need to perform the one-key remote back-suction operation when the first recording duration is less than the minimum time limit value and the execution result of the back-suction evacuation operation is the execution result of performing the second back-suction evacuation operation.

[0009] Optionally, before determining the first recording duration, the method further includes: when the execution result of the back-suction evacuation operation is the execution result of performing the second back-suction evacuation operation, determining a second recording duration, where the second recording duration is the duration between the diesel vehicle turning off the engine and the current moment; generating a first prompt message to prompt that the parking duration has exceeded the limit and suggesting to perform the one-key remote back-suction operation when the second recording duration is greater than or equal to a first time threshold; updating the second recording duration until the second recording duration is greater than or equal to the first time threshold when the second recording duration is less than the first time threshold.

[0010] Optionally, before determining the first recording duration, the method further includes: when the execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation, determining a second recording duration, where the second recording duration is the duration between the diesel vehicle turning off the engine and the current moment; generating a second prompt message to prompt that the cut-off time of the main power supply does not meet the standard and suggesting to perform the one-key remote back-suction operation when the second recording duration is greater than or equal to a second time threshold; updating the second recording duration until the second recording duration is greater than or equal to the second time threshold when the second recording duration is less than the second time threshold.

[0011] According to another aspect of the present application, there is provided a control device for a urea injection system of a diesel vehicle, including: an acquisition unit configured to acquire the ambient temperature and ambient pressure of the environment where the diesel vehicle is located to obtain the current ambient temperature and the current ambient pressure; a first processing unit configured to perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, where the first back-suction evacuation operation is a back-suction evacuation operation performed according to a preset time, and the duration of the back-suction evacuation operation in the second back-suction evacuation operation is less than the duration of the back-suction evacuation operation in the first back-suction evacuation operation; a second processing unit configured to determine a first recording duration, and determine whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction evacuation operation, where the first recording duration is the duration between the diesel vehicle shutting down and cutting off the main power supply, the one-key remote back-suction operation means that in the case of starting the diesel vehicle next time, controlling the urea injection system to perform a cleaning process, and the execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation or the second back-suction evacuation operation.

[0012] According to still another aspect of the present application, there is provided a computer-readable storage medium, where the computer-readable storage medium includes a stored program, and when the program runs, it controls the device where the computer-readable storage medium is located to execute any one of the above methods.

[0013] According to yet another aspect of the present application, there is provided a diesel vehicle system, including: one or more processors, a memory, and one or more programs, where the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include those for executing any one of the above methods.

[0014] Applying the technical solution of the present application, by performing a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, the purpose of performing the back-suction evacuation operation for a reasonable duration according to the actual working conditions is achieved, preventing the high-temperature exhaust gas in the exhaust pipe from corroding the nozzle and pipeline due to back-suction evacuation. Finally, according to the magnitude of the first recording duration and the execution result of the back-suction evacuation operation, it is determined whether to perform a one-key remote back-suction operation, so as to further ensure that the exhaust pipe of the urea injection system will not freeze and the pipeline will not burst, thereby solving the problem that in the existing diesel vehicle, even if enough time is left before cutting off the main power, there will still be a long-time back-suction evacuation, resulting in the high-temperature exhaust gas in the exhaust pipe corroding the nozzle and pipeline. Description of the Drawings

[0015] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0016] Figure 1 A schematic flowchart showing a control method for a urea injection system of a diesel vehicle provided according to an embodiment of this application is shown;

[0017] Figure 2 A schematic flowchart showing a first specific implementation manner of performing a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure provided according to an embodiment of this application is shown;

[0018] Figure 3 A schematic flowchart showing a second specific implementation manner of performing a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure provided according to an embodiment of this application is shown;

[0019] Figure 4 A schematic flowchart showing a third specific implementation manner of performing a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure provided according to an embodiment of this application is shown;

[0020] Figure 5 A schematic flowchart showing a control method for another urea injection system of a diesel vehicle provided according to an embodiment of this application is shown;

[0021] Figure 6 A structural block diagram showing a control device for a urea injection system of a diesel vehicle provided according to an embodiment of this application is shown. Detailed implementation manners

[0022] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the accompanying drawings and combine the embodiments to detail this application.

[0023] In order to enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0024] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] As introduced in the background art, existing diesel vehicles are all equipped with a urea injection system for injecting urea into the tailpipe to carry out chemical reactions with nitrogen oxides in the exhaust gas, thereby reducing pollutants in the exhaust gas. In order to prevent the urea solution from remaining in the pipeline and freezing, causing the pipeline to burst, current diesel vehicles require 30 to 90 seconds to perform the back-suction evacuation operation of the urea injection system between turning off the engine and cutting off the main power. However, many drivers, regardless of the ambient temperature, sometimes directly turn off the engine and cut off the main power, without performing the back-suction evacuation operation. To solve the problem that existing diesel vehicles, even if enough time is left before cutting off the main power, there will be a long back-suction evacuation, resulting in high-temperature exhaust gas in the exhaust pipe corroding the nozzles and pipelines, embodiments of the present application provide a control method for the urea injection system of a diesel vehicle, a control device for the urea injection system of a diesel vehicle, a computer-readable storage medium, and a diesel vehicle system.

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] In this embodiment, a control method for the urea injection system of a diesel vehicle is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0028] Figure 1 It is a schematic flowchart of a control method for the urea injection system of a diesel vehicle provided according to an embodiment of the present application. As Figure 1 shown, the method includes the following steps:

[0029] Step S101, obtain the ambient temperature and ambient pressure of the diesel vehicle, and obtain the current ambient temperature and current ambient pressure;

[0030] The ambient pressure is the measured value of the atmospheric pressure in the environment where the diesel vehicle is located. A temperature sensor and a pressure sensor are used to collect the current ambient temperature and the current ambient pressure.

[0031] Installation location of the temperature sensor:

[0032] Intake pipe: The temperature sensor can be installed in the intake duct of the diesel vehicle to detect the ambient temperature during vehicle operation. This location can more directly reflect the temperature conditions of the external environment where the vehicle is located.

[0033] Near the urea injection system: Install the temperature sensor near the urea injection system, such as near the urea tank, urea pump or nozzle, to monitor the operating temperature of the injection system. This is particularly important for evaluating the evaporation and crystallization risks of the urea solution at different temperatures. In addition, monitoring the temperature inside the urea tank also helps to determine whether heating and thawing are required, especially in low-temperature environments.

[0034] Vehicle outer surface: Install the temperature sensor on the outer surface of the vehicle, such as near the front grille or side skirt, to obtain the temperature information of the external environment of the vehicle. This installation method is applicable to situations where the ambient temperature around the vehicle needs to be monitored.

[0035] Installation location of the pressure sensor:

[0036] Exhaust system: The pressure sensor can be installed in the exhaust system of the diesel vehicle, such as in the exhaust pipe near the tail gas emission port, to measure the exhaust back pressure. Although this mainly reflects the pressure state of the engine exhaust, to a certain extent, it can also reflect the change of the external pressure, especially in areas with large altitude changes.

[0037] Vehicle exterior: Install the pressure sensor outside the vehicle, such as on the roof or at a position close to the ground at the bottom of the vehicle, to more directly measure the ambient atmospheric pressure. This method is particularly suitable for intelligent systems that require accurate ambient pressure data to evaluate the necessity of the reverse suction and evacuation operation of the urea injection system.

[0038] Urea injection system: The pressure sensor can also be installed in the pipeline of the urea injection system, especially at the inlet or outlet of the urea pump, to monitor the pressure state of the urea solution flow, which helps to evaluate the operating conditions of the system and the efficiency of the reverse suction operation.

[0039] Step S102, perform the first reverse suction and evacuation operation or the second reverse suction and evacuation operation at least according to the above current ambient temperature and current ambient pressure. The above first reverse suction and evacuation operation is a reverse suction and evacuation operation carried out according to a preset time, and the duration of the reverse suction and evacuation operation in the above second reverse suction and evacuation operation is less than the duration of the reverse suction and evacuation operation in the above first reverse suction and evacuation operation;

[0040] Among them, the preset time is 30 to 90 s.

[0041] Step S103: Determine the first recording duration, and determine whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction and evacuation operation. The first recording duration is the duration between the diesel vehicle turning off the engine and cutting off the total power supply. The one-key remote back-suction operation means that when the diesel vehicle is started next time, the urea injection system is controlled to perform an emptying process. The execution result of the back-suction and evacuation operation is the execution result of performing the first back-suction and evacuation operation or the second back-suction and evacuation operation.

[0042] In the above steps, by performing at least the first back-suction and evacuation operation or the second back-suction and evacuation operation according to the current ambient temperature and the current ambient pressure, the purpose of performing the back-suction and evacuation operation for a reasonable duration according to the actual working conditions is achieved, preventing the high-temperature exhaust gas in the exhaust pipe from corroding the nozzle and pipeline due to back-suction and evacuation. Finally, according to the magnitude of the first recording duration and the execution result of the back-suction and evacuation operation, it is determined whether to perform the one-key remote back-suction operation, so as to further ensure that the exhaust pipe of the urea injection system will not freeze and the pipeline will not burst, thus solving the problem that even if enough time is left to cut off the total power in existing diesel vehicles, there will still be a long-term back-suction and evacuation that causes the high-temperature exhaust gas in the exhaust pipe to corrode the nozzle and pipeline.

[0043] Among them, as Figure 2 shown, step S102, that is, performing at least the first back-suction and evacuation operation or the second back-suction and evacuation operation according to the current ambient temperature and the current ambient pressure, includes the following steps:

[0044] Step S201: When the current ambient temperature is greater than or equal to the temperature threshold and the current ambient pressure is greater than or equal to the pressure threshold, perform the second back-suction and evacuation operation;

[0045] The temperature threshold in step S201 above can be 5 to 10 °C;

[0046] The pressure threshold in step S201 above can be set to 800 - 900 hPa.

[0047] Step S202: When the current ambient temperature is less than the temperature threshold and / or the current ambient pressure is less than the pressure threshold, perform the first back-suction and evacuation operation.

[0048] The above “and / or” includes three situations:

[0049] The first situation: The current ambient temperature is less than the temperature threshold and the current ambient pressure is less than the pressure threshold;

[0050] The second case: the above-mentioned current ambient temperature is greater than or equal to the above-mentioned temperature threshold, and the above-mentioned current ambient pressure is less than the above-mentioned pressure threshold;

[0051] The third case: the above-mentioned current ambient temperature is less than the above-mentioned temperature threshold, and the above-mentioned current ambient pressure is greater than or equal to the above-mentioned pressure threshold;

[0052] Specifically, when the ambient temperature is relatively high (i.e., the above-mentioned current ambient temperature is greater than or equal to the temperature threshold), the urea solution in the urea injection system is not easy to crystallize. At the same time, the temperature in the tail pipe is also relatively high, and the long-term backflow is more likely to cause the nozzle and pipeline to be eroded by high-temperature exhaust gas, accelerating material aging; by performing a shorter backflow time, it is possible to ensure the discharge of the residual urea in the nozzle while reducing the negative impact of high-temperature exhaust gas on the system components; in the case of a relatively low ambient temperature, if the urea solution remains in the system, it may cause the pipeline to burst due to freezing. Performing a longer backflow time can ensure that the residual urea in the system is completely emptied, avoiding the freezing risk in a low-temperature environment; through the judgment of the ambient pressure, the special conditions in the plateau environment can be considered. The air pressure in the plateau area is relatively low, which may affect the normal operation of the urea injection system. Performing a longer backflow operation can ensure that the system can be fully emptied even in a low-pressure environment, avoiding failures; for vehicles that often travel in areas with large temperature and pressure changes, this strategy can automatically adjust the backflow time according to the real-time environmental conditions, not only ensuring the normal operation of the system, but also avoiding unnecessary energy waste, improving the user experience and the operation efficiency of the vehicle.

[0053] Among them, as Figure 3 shown, step S102, that is, performing the first backflow evacuation operation or the second backflow evacuation operation at least according to the above-mentioned current ambient temperature and current ambient pressure, includes the following steps:

[0054] Step S301, when the above-mentioned current ambient temperature is greater than or equal to the temperature threshold, the above-mentioned current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle, perform the above-mentioned second backflow evacuation operation;

[0055] Step S302, when the first preset condition is met, perform the above-mentioned first backflow evacuation operation. The above-mentioned first preset condition includes at least one of the following: the above-mentioned current ambient temperature is less than the above-mentioned temperature threshold, the above-mentioned current ambient pressure is less than the above-mentioned pressure threshold, and it is determined that the above-mentioned urea heating and thawing request has been received during the above-mentioned current driving cycle.

[0056] The above-mentioned first preset condition may include the following situations:

[0057] Example 1 scenario: The above-mentioned current ambient temperature is less than the above-mentioned temperature threshold, and the above-mentioned current ambient pressure is less than the above-mentioned pressure threshold, and it is determined that the above-mentioned urea heating and thawing request has been received during the above-mentioned current driving cycle;

[0058] Example 2 scenario: The above-mentioned current ambient temperature is less than the above-mentioned temperature threshold, and the above-mentioned current ambient pressure is less than the above-mentioned pressure threshold, and it is determined that the above-mentioned urea heating and thawing request has not been received during the above-mentioned current driving cycle;

[0059] Comprehensively considering the ambient temperature, ambient pressure, and vehicle operating status (whether the urea heating and thawing request is received), it can more comprehensively evaluate whether the urea injection system needs to perform a long-term back-suction and evacuation under the current conditions to avoid crystallization or icing; by accurately judging whether to perform the long-term back-suction operation, it avoids extending the back-suction time when it is not needed, reduces energy consumption, and also prevents system failures caused by insufficient back-suction operations when needed; the urea heating and thawing request usually indicates that the system is operating in a low-temperature environment and there may be a crystallization risk. Therefore, if such a request is received during the current driving cycle, performing a long-term back-suction can effectively prevent blockages in the nozzles and pipelines, improving the safety and reliability of the entire system; by communicating with the cloud, not only can the environmental parameters be monitored in real time, but also more reasonable and dynamic decisions can be made based on historical data and the current vehicle status. This enhances the intelligent interconnection function of the vehicle, enabling it to better adapt to different operating environments and conditions.

[0060] Among them, as Figure 4 shown, step S102, that is, at least according to the above-mentioned current ambient temperature and current ambient pressure, perform the first back-suction and evacuation operation or the second back-suction and evacuation operation, including the following steps:

[0061] Step S401, when the latitude information of the above-mentioned diesel vehicle is less than the latitude threshold, the above-mentioned current ambient temperature is greater than or equal to the temperature threshold, the above-mentioned current ambient pressure is greater than or equal to the pressure threshold, and it is determined that the above-mentioned urea heating and thawing request has not been received during the current driving cycle, perform the above-mentioned second back-suction and evacuation operation;

[0062] The latitude threshold can be set with reference to the latitude of the plateau area.

[0063] Step S402, when the second preset condition is met, perform the above-mentioned first back-suction and evacuation operation, and the above-mentioned second preset condition includes at least one of the following: the above-mentioned current ambient temperature is less than the above-mentioned temperature threshold, the above-mentioned current ambient pressure is less than the above-mentioned pressure threshold, it is determined that the above-mentioned urea heating and thawing request has been received during the above-mentioned current driving cycle, and the latitude information of the above-mentioned diesel vehicle is greater than or equal to the above-mentioned latitude threshold.

[0064] The above second preset condition may include the following situations:

[0065] Situation of Example 3: The above current ambient temperature is less than the above temperature threshold, and the above current ambient pressure is less than the above pressure threshold, and it is determined that the above urea heating and thawing request has been received during the above current driving cycle, and the latitude information of the above diesel vehicle is greater than or equal to the above latitude threshold;

[0066] Situation of Example 4: The above current ambient temperature is less than the above temperature threshold, and the above current ambient pressure is less than the above pressure threshold, and it is determined that the above urea heating and thawing request has not been received during the above current driving cycle, and the latitude information of the above diesel vehicle is greater than or equal to the above latitude threshold;

[0067] A specific usage scenario of performing at least one of the first backflush evacuation operation or the second backflush evacuation operation based on the above current ambient temperature and current ambient pressure: A diesel vehicle is performing a long-distance transportation task in winter. The ambient temperature drops suddenly to below -10°C, the ambient pressure remains at the standard level, and the vehicle is located in a region with a relatively high latitude (higher than the set latitude threshold, such as 45° north latitude), which means the vehicle is in a cold environment. At the end of a driving cycle, the ECU receives a urea heating and thawing request, indicating that the system has encountered low-temperature conditions during operation.

[0068] Execution operation of a specific usage scenario of performing at least one of the first backflush evacuation operation or the second backflush evacuation operation based on the above current ambient temperature and current ambient pressure: Since the current ambient temperature is lower than the threshold and the latitude of the vehicle is higher than the threshold, and the ECU receives a urea heating and thawing request, this meets one of the above second preset conditions. Therefore, the vehicle performs a first backflush evacuation operation for a preset time of 30 - 90 s (i.e., the preset time) after shutting down to ensure that the urea solution in the system is completely emptied, preventing crystallization from blocking the nozzle or causing the pipeline to freeze and rupture under extremely cold conditions.

[0069] Beneficial effects of a specific usage scenario of performing at least one of the first backflush evacuation operation or the second backflush evacuation operation based on the above current ambient temperature and current ambient pressure: The long backflush evacuation operation ensures that the liquid inside the system is completely removed, greatly reducing the risk of urea solution crystallization or icing under extremely cold conditions; effectively avoiding accidental shutdowns caused by system freezing, ensuring the safe operation of the vehicle in harsh environments, reducing maintenance costs and downtime; the addition of latitude information enables the system to automatically adjust the backflush strategy according to the geographical location, which is particularly suitable for long-distance transportation across multiple climate zones, reflecting the intelligence and adaptability of the system; drivers know that the vehicle is equipped with technologies capable of coping with extreme climates, increasing their confidence in the vehicle's performance, especially during cold long-distance transportation tasks.

[0070] In an embodiment of the present application, determining whether to perform a one-key remote back-suction operation according to the above first recording duration and the execution result of the back-suction evacuation operation includes: determining the minimum time limit value corresponding to the execution result of the back-suction evacuation operation; in the case that the above first recording duration is greater than or equal to the above minimum time limit value, determining to perform the above one-key remote back-suction operation; in the case that the above first recording duration is less than the above minimum time limit value and the execution result of the back-suction evacuation operation is the execution result of performing the above first back-suction evacuation operation, determining that there is no need to perform the above one-key remote back-suction operation; in the case that the above first recording duration is less than the above minimum time limit value and the execution result of the back-suction evacuation operation is the execution result of performing the above second back-suction evacuation operation, determining that there is no need to perform the above one-key remote back-suction operation.

[0071] During the process of determining the minimum time limit value corresponding to the execution result of the back-suction evacuation operation, the minimum time limit value of the first back-suction evacuation operation is 30 seconds, and the minimum time limit value of the second back-suction evacuation operation is 5 seconds.

[0072] Specifically, a specific usage scenario of determining whether to perform a one-key remote back-suction operation according to the above first recording duration and the execution result of the back-suction evacuation operation: A diesel vehicle equipped with the present application operates in the city in summer. The ambient temperature is 35 °C, the ambient pressure is at the standard level (about 1013 hPa), and the vehicle is located in a region with a relatively low latitude (lower than the set latitude threshold, such as 30° north latitude). Therefore, the above second back-suction evacuation operation (i.e., a 5-second back-suction) was performed when the vehicle was turned off. However, the driver immediately cut off the total power supply of the vehicle after turning off the engine, and the duration of this operation was only 2 seconds, which was significantly less than the minimum time limit value set by the system (such as 5 seconds).

[0073] Execution operation of a specific usage scenario of determining whether to perform a one-key remote back-suction operation according to the above first recording duration and the execution result of the back-suction evacuation operation: Since the vehicle performed the above second back-suction evacuation operation (i.e., a short 5-second back-suction) after turning off the engine, and the recorded time from turning off the engine to cutting off the total power supply (the first recording duration) was less than the minimum time limit value of 5 seconds, the system determined that the driver cut off the power too quickly and there was a risk that the urea solution was not completely emptied. In this case, the cloud platform calculates the time from turning off the engine to cutting off the power through the message information received by the driving companion or the T-BOX (Telematics Box, a key component in the vehicle networking system, mainly used to realize wireless communication between the vehicle and the external network) hardware device. After identifying that the time is insufficient, it automatically sends a warning message to the driver through the mobile APP, suggesting that the driver immediately perform a one-key remote back-suction operation to ensure that the urea solution inside the urea injection system is completely emptied.

[0074] T-BOX and Driving Companion: A hardware device plugged into a vehicle to continuously send monitored data streams to a cloud platform. The cloud data transmitted back can be used for strategy mining and data analysis by developers.

[0075] Beneficial effects of a specific usage scenario for determining whether to perform a one-key remote backflush operation based on the above first recording duration and the execution result of the backflush evacuation operation: Instant advice on the one-key remote backflush operation avoids the risk that the urea solution may not be completely emptied due to too rapid power-off, thus preventing the risk of urea crystallization in the pipeline and ensuring the long-term reliability and stability of the system; By warning and recommending the execution of the one-key remote backflush, the driver can take timely measures to avoid potential damage to the nozzle and pipeline caused by urea crystallization, reducing maintenance costs and the occurrence frequency of system failures; The cloud platform can intelligently adjust and recommend operations according to real-time vehicle status and environmental conditions, enabling the vehicle to automatically adapt to different operating environments, reducing the driver's operation burden and enhancing the intelligent management level of the system; The warnings and suggestions received by the driver and fleet manager through the mobile APP can make them feel the precise control of details and the forward-looking warning of possible risks by the system, enhancing their trust and dependence on the vehicle intelligent system and improving operation efficiency.

[0076] In an embodiment of the present application, before determining the first recording duration, the above method further includes: When the execution result of the backflush evacuation operation is the execution result of the second backflush evacuation operation, determining a second recording duration, where the second recording duration is the duration between the diesel vehicle's engine shutdown and the current moment; When the second recording duration is greater than or equal to a first time threshold, generating a first prompt message to prompt that the parking duration has exceeded the limit and recommending the execution of the one-key remote backflush operation; When the second recording duration is less than the first time threshold, updating the second recording duration until the second recording duration is greater than or equal to the first time threshold.

[0077] When the parking duration does not reach the threshold, the system patiently updates the second recording duration, avoiding unnecessary backflush operations. This is beneficial for reducing the erosion of high-temperature exhaust gas on the nozzle and pipeline in a high ambient temperature environment and saving energy when the temperature is appropriate, reflecting the precise control and adaptive adjustment of the intelligent system for maintenance strategies and enhancing the intelligent level of vehicle maintenance. The timely advice on the one-key remote backflush operation not only prevents blockage of the urea injection system but also reduces the risk of system damage caused by improper maintenance. This helps to improve the working reliability and service life of the injection system, reduces the number of repairs and costs caused by system failures, and has an important impact on the overall maintenance cost control and operation efficiency improvement of the vehicle.

[0078] In an embodiment of the present application, before determining the first recording duration, the above method further includes: in the case where the execution result of the above backflow evacuation operation is the execution result of the above first backflow evacuation operation, determining a second recording duration, where the second recording duration is the duration between the diesel vehicle turning off and the current moment; in the case where the second recording duration is greater than or equal to a second time threshold, generating a second prompt message to prompt that the cut-off time of the above main power supply does not meet the standard, and suggesting to execute the above one-key remote backflow operation; in the case where the second recording duration is less than the second time threshold, updating the second recording duration until the second recording duration is greater than or equal to the second time threshold.

[0079] The first time threshold is 3 - 5 days, and the second time threshold is 0.1 - 0.5 days.

[0080] By monitoring the second recording duration, that is, the duration from the vehicle turning off to the current moment, it is ensured that the urea injection system of the vehicle is fully evacuated under low temperature or specific environmental conditions, which is crucial for preventing urea crystallization in the nozzles and pipelines and ensuring system integrity and injection efficiency; generating the second prompt message when the second recording duration is greater than or equal to the second time threshold can timely warn the driver about the situation where the cut-off time of the main power supply does not meet the standard, and suggest executing the one-key remote backflow operation. This intelligent early warning mechanism helps prevent blockage of the urea injection system, reducing future maintenance requirements and possible system failures; continuously updating the second recording duration and sending a prompt when the threshold is reached not only directly guides the user to take appropriate actions but also indirectly educates the user about the importance of correct maintenance, especially the vehicle operation knowledge in the face of complex environmental conditions, enhancing the user's self-maintenance ability.

[0081] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the control method for the urea injection system of the diesel vehicle in the present application will be described in detail below with specific embodiments.

[0082] This embodiment relates to a specific control method for the urea injection system of a diesel vehicle, as Figure 5 shown, including:

[0083] Obtaining the ambient temperature and ambient pressure of the environment where the diesel vehicle is located to obtain the current ambient temperature and the current ambient pressure;

[0084] When the latitude information of the diesel vehicle is less than the latitude threshold, the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle, the second back-suction evacuation operation is performed; when the second preset condition is satisfied, the first back-suction evacuation operation is performed, and the second preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, it is determined that a urea heating and thawing request has been received during the current driving cycle, the latitude information of the diesel vehicle is greater than or equal to the latitude threshold. The first back-suction evacuation operation is a back-suction evacuation operation performed according to a preset time (i.e., a 30 - 90s back-suction evacuation operation), and the duration of the back-suction evacuation operation in the second back-suction evacuation operation is less than the duration of the back-suction evacuation operation in the first back-suction evacuation operation (i.e., a 5-second back-suction evacuation operation);

[0085] Determine whether to perform a one-key remote back-suction operation according to the first recording duration, the execution result of the back-suction evacuation operation, and the second recording duration.

[0086] That is, determine the first recording duration, and determine whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction evacuation operation. The first recording duration is the duration between the diesel vehicle turning off and cutting off the main power supply. The one-key remote back-suction operation means that in the case of starting the diesel vehicle next time, the urea injection system is controlled for emptying treatment. The execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation or the second back-suction evacuation operation.

[0087] Specifically, determine the minimum time limit value corresponding to the execution result of the back-suction evacuation operation; when the first recording duration is greater than or equal to the minimum time limit value, determine to perform the one-key remote back-suction operation; when the first recording duration is less than the minimum time limit value and the execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation, determine that there is no need to perform the one-key remote back-suction operation; when the first recording duration is less than the minimum time limit value and the execution result of the back-suction evacuation operation is the execution result of performing the second back-suction evacuation operation, determine that there is no need to perform the one-key remote back-suction operation.

[0088] Before determining the first recording duration, when the execution result of the back-suction evacuation operation is the execution result of performing the second back-suction evacuation operation, determine the second recording duration. The second recording duration is the duration between the diesel vehicle turning off and the current moment; when the second recording duration is greater than or equal to the first time threshold, generate a first prompt message to prompt that the parking duration has timed out and it is recommended to perform the one-key remote back-suction operation; when the second recording duration is less than the first time threshold, update the second recording duration until the second recording duration is greater than or equal to the first time threshold.

[0089] Before determining the first recording duration, when the execution result of the backflush evacuation operation is the execution result of the first backflush evacuation operation, determine the second recording duration, where the second recording duration is the duration between the diesel vehicle shutting down and the current moment; when the second recording duration is greater than or equal to the second time threshold, generate a second prompt message to prompt that the cut-off time of the main power supply does not meet the standard, and it is recommended to perform a one-key remote backflush operation; when the second recording duration is less than the second time threshold, update the second recording duration until the second recording duration is greater than or equal to the second time threshold.

[0090] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0091] The embodiment of the present application also provides a control device for a urea injection system of a diesel vehicle. It should be noted that the control device for the urea injection system of the diesel vehicle in the embodiment of the present application can be used to execute the control method for the urea injection system of the diesel vehicle provided by the embodiment of the present application. This device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0092] The following introduces the control device for the urea injection system of the diesel vehicle provided by the embodiment of the present application.

[0093] Figure 6 It is a structural block diagram of a control device for a urea injection system of a diesel vehicle according to an embodiment of the present application. As Figure 6 shown, the device includes:

[0094] An acquisition unit 61, configured to acquire the ambient temperature and ambient pressure of the environment where the diesel vehicle is located, so as to obtain the current ambient temperature and the current ambient pressure; a first processing unit 62, configured to perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, where the first back-suction evacuation operation is a back-suction evacuation operation performed according to a preset time, and the duration of the back-suction evacuation operation in the second back-suction evacuation operation is less than the duration of the back-suction evacuation operation in the first back-suction evacuation operation; a second processing unit 63, configured to determine a first recording duration, and determine whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction evacuation operation, where the first recording duration is the duration between the diesel vehicle turning off and cutting off the total power supply, and the one-key remote back-suction operation represents that when the diesel vehicle is started next time, controlling the urea injection system to perform an emptying process, and the execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation or the second back-suction evacuation operation.

[0095] In an embodiment of the present application, the first processing unit includes a first processing module and a second processing module. The first processing module is configured to perform the second back-suction evacuation operation when the current ambient temperature is greater than or equal to a temperature threshold and the current ambient pressure is greater than or equal to a pressure threshold; the second processing module is configured to perform the first back-suction evacuation operation when the current ambient temperature is less than the temperature threshold and / or the current ambient pressure is less than the pressure threshold.

[0096] Specifically, when the ambient temperature is relatively high (i.e., the current ambient temperature is greater than or equal to the temperature threshold), the urea solution in the urea injection system is not easily crystallized, and at the same time, the temperature in the tail gas pipe is also relatively high. A long-time back-suction is more likely to cause the nozzle and pipeline to be eroded by high-temperature exhaust gas, accelerating material aging; by performing a shorter back-suction time, it is possible to ensure the discharge of the residual urea in the nozzle while reducing the negative impact of high-temperature exhaust gas on the system components; in the case of a low ambient temperature, if the urea solution remains in the system, it may cause the pipeline to burst due to icing. Performing a longer back-suction time can ensure that the residual urea in the system is completely emptied, avoiding the icing risk in a low-temperature environment; through the judgment of the ambient pressure, the special conditions in the plateau environment can be considered. The air pressure in the plateau area is relatively low, which may affect the normal operation of the urea injection system. Performing a longer back-suction operation can ensure that the system can be fully emptied even in a low-pressure environment, avoiding failures; for vehicles that often travel in areas with large temperature and pressure changes, this strategy can automatically adjust the back-suction time according to the real-time environmental conditions, ensuring the normal operation of the system, avoiding unnecessary energy waste, and improving the user experience and the operation efficiency of the vehicle.

[0097] In an embodiment of the present application, the first processing unit includes a third processing module and a fourth processing module. The third processing module is configured to perform the second backflush evacuation operation when the following conditions are simultaneously met: the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle. The fourth processing module is configured to perform the first backflush evacuation operation when a first preset condition is met. The first preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, and it is determined that the urea heating and thawing request has been received during the current driving cycle.

[0098] The ambient temperature, ambient pressure, and vehicle operating state (whether a urea heating and thawing request has been received) are comprehensively considered, so as to more comprehensively evaluate whether the urea injection system needs to perform a long-term backflush evacuation under the current conditions to avoid crystallization or icing. By accurately judging whether to perform a long-term backflush operation, the extension of the backflush time under unnecessary circumstances is avoided, energy consumption is reduced, and at the same time, system failures caused by insufficient backflush operations when needed are prevented. The urea heating and thawing request usually indicates that the system is operating in a low-temperature environment and there may be a crystallization risk. Therefore, if such a request is received during the current driving cycle, performing a long-term backflush can effectively prevent blockages in the nozzles and pipelines, improving the safety and reliability of the entire system. By communicating with the cloud, not only can the environmental parameters be monitored in real time, but also more reasonable and dynamic decisions can be made based on historical data and the current vehicle state. This enhances the intelligent interconnection function of the vehicle, enabling it to better adapt to different operating environments and conditions.

[0099] In an embodiment of the present application, the first processing unit includes a fifth processing module and a sixth processing module. The fifth processing module is configured to perform the second backflush evacuation operation when the following conditions are simultaneously met: the latitude information of the diesel vehicle is less than the latitude threshold, the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle. The sixth processing module is configured to perform the first backflush evacuation operation when a second preset condition is met. The second preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, it is determined that the urea heating and thawing request has been received during the current driving cycle, and the latitude information of the diesel vehicle is greater than or equal to the latitude threshold.

[0100] A specific usage scenario of performing at least one of the first back-suction evacuation operation or the second back-suction evacuation operation based on the above current ambient temperature and current ambient pressure: A diesel vehicle is performing a long-distance transportation task in winter. The ambient temperature drops suddenly to below -10°C, the ambient pressure remains at the standard level, and the vehicle is located in a region with a relatively high latitude (higher than the set latitude threshold, such as 45° north latitude), which means the vehicle is in a cold environment. At the end of a driving cycle, the ECU receives a request for urea heating and thawing, indicating that the system has encountered low-temperature conditions during operation.

[0101] The execution operation of a specific usage scenario of performing at least one of the first back-suction evacuation operation or the second back-suction evacuation operation based on the above current ambient temperature and current ambient pressure: Since the current ambient temperature is lower than the threshold and the latitude where the vehicle is located is higher than the threshold, and the ECU receives a request for urea heating and thawing, this meets one of the above second preset conditions. Therefore, after the vehicle shuts off, it performs a first back-suction evacuation operation for a period of 30 to 90 seconds (i.e., the preset time) to ensure that the urea solution in the system is completely emptied, preventing crystallization from clogging the nozzles or causing the pipeline to freeze and rupture under extremely cold conditions.

[0102] The beneficial effects of a specific usage scenario of performing at least one of the first back-suction evacuation operation or the second back-suction evacuation operation based on the above current ambient temperature and current ambient pressure: The long-term back-suction evacuation operation ensures that the liquid inside the system is completely removed, greatly reducing the risk of urea solution crystallization or icing under extremely cold conditions; effectively avoiding accidental shutdowns caused by system freezing, ensuring the safe operation of the vehicle in harsh environments, reducing maintenance costs and downtime; the addition of latitude information enables the system to automatically adjust the back-suction strategy according to the geographical location, which is especially suitable for long-distance transportation across multiple climate zones, reflecting the intelligence and adaptability of the system; drivers know that the vehicle is equipped with technologies that can cope with extreme climates, increasing their confidence in the vehicle's performance, especially during cold long-distance transportation tasks.

[0103] In an embodiment of the present application, the second processing unit includes a first determination module, a second determination module, a third determination module, and a fourth determination module. The first determination module is configured to determine the minimum time limit value corresponding to the execution result of the above-mentioned backflow evacuation operation; the second determination module is configured to determine to execute the above-mentioned one-key remote backflow operation when the above-mentioned first recorded duration is greater than or equal to the above-mentioned minimum time limit value; the third determination module is configured to determine that there is no need to execute the above-mentioned one-key remote backflow operation when the above-mentioned first recorded duration is less than the above-mentioned minimum time limit value and the execution result of the above-mentioned backflow evacuation operation is the execution result of the above-mentioned first backflow evacuation operation; the fourth determination module is configured to determine that there is no need to execute the above-mentioned one-key remote backflow operation when the above-mentioned first recorded duration is less than the above-mentioned minimum time limit value and the execution result of the above-mentioned backflow evacuation operation is the execution result of the above-mentioned second backflow evacuation operation.

[0104] Specifically, a specific usage scenario for determining whether to execute the one-key remote backflow operation according to the above-mentioned first recorded duration and the execution result of the backflow evacuation operation: A diesel vehicle equipped with the present application operates in the city in summer. The ambient temperature is 35°C, the ambient pressure is at the standard level (about 1013 hPa), and the vehicle is located in a region with a relatively low latitude (below the set latitude threshold, such as 30° north latitude). Therefore, the above-mentioned second backflow evacuation operation (i.e., a 5-second backflow) is performed when the vehicle is turned off. However, the driver immediately cut off the total power supply of the vehicle after turning off the engine, and the duration of this operation is only 2 seconds, which is significantly less than the minimum time limit value set by the system (e.g., 5 seconds).

[0105] Execution operation of a specific usage scenario for determining whether to execute the one-key remote backflow operation according to the above-mentioned first recorded duration and the execution result of the backflow evacuation operation: Since the above-mentioned second backflow evacuation operation (i.e., a short 5-second backflow) is performed after the vehicle is turned off, and the recorded time from turning off the engine to cutting off the total power supply (the first recorded duration) is less than the minimum time limit value of 5 seconds, the system determines that the driver cuts off the power too quickly, and there is a risk that the urea solution is not completely emptied. In this case, the cloud platform calculates the time from turning off the engine to cutting off the power through the message information received by the driving companion or the T-BOX (Telematics Box, a key component in the vehicle networking system, mainly used to achieve wireless communication between the vehicle and the external network) hardware device. After identifying that the time is insufficient, it automatically sends a warning message to the driver through the mobile APP, advising him to immediately execute the one-key remote backflow operation to ensure that the urea solution inside the urea injection system is completely emptied.

[0106] Beneficial effects of a specific usage scenario for determining whether to perform a one - key remote back - suction operation based on the above - mentioned first recording duration and the execution result of the back - suction evacuation operation: The instant advice for the one - key remote back - suction operation avoids the risk that the urea solution may not be completely evacuated due to too fast power - off, thus preventing the risk of urea crystallization in the pipeline, and ensuring the long - term reliability and stability of the system; By warning and recommending the execution of the one - key remote back - suction, the driver can take timely measures to avoid potential damage to the nozzle and pipeline caused by urea crystallization, reducing the maintenance cost and the occurrence frequency of system failures; The cloud platform can intelligently adjust and recommend operations according to the real - time vehicle status and environmental conditions, enabling the vehicle to automatically adapt to different operating environments, reducing the driver's operation burden, and enhancing the intelligent management level of the system; The warnings and suggestions received by the driver and the fleet manager through the mobile APP can make them feel the precise control of details and the forward - looking warning of possible risks by the system, enhancing the trust and dependence on the vehicle intelligent system and improving the operation efficiency.

[0107] In an embodiment of the present application, the above - mentioned device further includes a first determination unit, a first generation unit, and a first update unit. The first determination unit is configured to determine a second recording duration before determining the first recording duration, in the case where the execution result of the back - suction evacuation operation is the execution result of performing the second back - suction evacuation operation. The second recording duration is the duration between the diesel vehicle turning off the engine and the current moment; The first generation unit is configured to generate a first prompt message to prompt that the parking duration has timed out and recommend performing the above - mentioned one - key remote back - suction operation when the second recording duration is greater than or equal to a first time threshold; The first update unit is configured to update the second recording duration when the second recording duration is less than the first time threshold until the second recording duration is greater than or equal to the first time threshold.

[0108] When the parking duration does not reach the threshold, the system patiently updates the second recording duration, avoiding unnecessary back - suction operations. This is beneficial for reducing the erosion of high - temperature exhaust gas on the nozzle and pipeline in a high - temperature environment, and saving energy when the temperature is appropriate, reflecting the precise control and adaptive adjustment of the intelligent system for the maintenance strategy, and enhancing the intelligent level of vehicle maintenance. The timely advice for the one - key remote back - suction operation not only prevents the blockage of the urea injection system but also reduces the risk of system damage caused by improper maintenance. This helps to improve the working reliability and service life of the injection system, reduces the number of repairs and costs caused by system failures, and has an important impact on the overall control of the vehicle's maintenance cost and the improvement of operation efficiency.

[0109] In an embodiment of the present application, the above-mentioned device further includes a second determination unit, a second generation unit, and a second update unit. The second determination unit is configured to determine a second recording duration before determining the first recording duration, in the case where the execution result of the above-mentioned backflow evacuation operation is the execution result of the above-mentioned first backflow evacuation operation. The second recording duration is the duration between the diesel vehicle turning off the engine and the current moment. The second generation unit is configured to generate a second prompt message when the second recording duration is greater than or equal to a second time threshold, to prompt that the cut-off time of the above-mentioned main power supply does not meet the standard, and it is recommended to perform the above-mentioned one-key remote backflow operation. The second update unit is configured to update the second recording duration when the second recording duration is less than the second time threshold until the second recording duration is greater than or equal to the second time threshold.

[0110] By monitoring the second recording duration, that is, the duration from the vehicle turning off the engine to the current moment, it is ensured that the urea injection system of the vehicle has been fully evacuated under low temperature or specific environmental conditions, which is crucial for preventing urea crystallization in the nozzle and pipeline and ensuring system integrity and injection efficiency; generating a second prompt message when the second recording duration is greater than or equal to the second time threshold can timely warn the driver about the situation that the cut-off time of the main power supply does not meet the standard, and it is recommended to perform the one-key remote backflow operation. This intelligent early warning mechanism helps prevent blockage of the urea injection system, reducing future maintenance requirements and possible system failures; continuously updating the second recording duration and sending a prompt when the threshold is reached not only directly guides the user to take appropriate actions, but also indirectly educates the user about the importance of proper maintenance, especially the vehicle operation knowledge in the face of complex environmental conditions, enhancing the user's self-maintenance ability.

[0111] The control device of the urea injection system of the above-mentioned diesel vehicle includes a processor and a memory. The above-mentioned acquisition unit, first processing unit, second processing unit, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to implement corresponding functions. The above-mentioned modules are all located in the same processor; or, the above-mentioned each module is located in different processors in any combination form.

[0112] The processor contains a kernel, and the kernel retrieves the corresponding program unit from the memory. One or more kernels can be set, and by adjusting the kernel parameters, the problem that even if enough time is left to cut off the main power for existing diesel vehicles, there will still be long-term backflow evacuation, resulting in high-temperature exhaust gas in the exhaust pipe corroding the nozzle and pipeline can be solved.

[0113] The memory may include non-permanent memory in a computer-readable medium, forms such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM), and the memory includes at least one storage chip.

[0114] An embodiment of the present invention provides a computer-readable storage medium. The computer-readable storage medium includes a stored program. When the program runs, it controls the device where the computer-readable storage medium is located to execute the control method of the urea injection system of the diesel vehicle.

[0115] An embodiment of the present invention provides a processor. The processor is used to run a program. When the program runs, it executes the control method of the urea injection system of the diesel vehicle.

[0116] An embodiment of the present invention provides a device. The device includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements at least the following steps: obtaining the ambient temperature and ambient pressure of the environment where the diesel vehicle is located to obtain the current ambient temperature and the current ambient pressure; performing a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure. The first back-suction evacuation operation is a back-suction evacuation operation performed according to a preset time, and the duration of the back-suction evacuation operation in the second back-suction evacuation operation is less than the duration of the back-suction evacuation operation in the first back-suction evacuation operation; determining a first recording duration, and determining whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction evacuation operation. The first recording duration is the duration between the diesel vehicle turning off and cutting off the main power supply. The one-key remote back-suction operation means that when the diesel vehicle is started next time, it controls the urea injection system to perform a clearing process. The execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation or the second back-suction evacuation operation. The device in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0117] The present application also provides a computer program product which, when executed on a data processing device, is adapted to execute a program initialized with at least the following method steps: obtaining the ambient temperature and ambient pressure of a diesel vehicle to obtain the current ambient temperature and the current ambient pressure; performing a first backflush evacuation operation or a second backflush evacuation operation at least according to the current ambient temperature and the current ambient pressure, where the first backflush evacuation operation is a backflush evacuation operation performed according to a preset time, and the duration of the backflush evacuation operation in the second backflush evacuation operation is less than the duration of the backflush evacuation operation in the first backflush evacuation operation; determining a first recording duration, and determining whether to perform a one-key remote backflush operation according to the first recording duration and the execution result of the backflush evacuation operation, where the first recording duration is the duration between the diesel vehicle turning off and cutting off the main power supply, and the one-key remote backflush operation means that in the case of starting the diesel vehicle next time, controlling the urea injection system to perform an emptying process, and the execution result of the backflush evacuation operation is the execution result of performing the first backflush evacuation operation or the second backflush evacuation operation.

[0118] The present application also provides a diesel vehicle system, including: one or more processors, a memory, and one or more programs, where the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include those for executing any of the above methods. By performing a first backflush evacuation operation or a second backflush evacuation operation at least according to the current ambient temperature and the current ambient pressure, the purpose of performing the backflush evacuation operation for a reasonable duration according to the actual working conditions is achieved, preventing the high-temperature exhaust gas in the exhaust pipe from corroding the nozzle and pipeline due to backflush evacuation. Finally, according to the magnitude of the first recording duration and the execution result of the backflush evacuation operation, it is determined whether to perform a one-key remote backflush operation, so as to further ensure that the exhaust pipe of the urea injection system will not freeze and the pipeline will not burst, thus solving the problem that in the existing diesel vehicle, even if enough time is left before cutting off the main power, there will still be a long-time backflush evacuation resulting in the high-temperature exhaust gas in the exhaust pipe corroding the nozzle and pipeline.

[0119] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device, so that they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order from here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module for implementation. In this way, the present invention is not limited to any specific combination of hardware and software.

[0120] Those skilled in the art will understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take 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.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows 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 the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one or more of the processes or Figure 1 blocks or combinations of blocks.

[0122] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the processes or Figure 1 blocks or combinations of blocks.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are performed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one or more of the processes or Figure 1 blocks or combinations of blocks.

[0124] In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and a memory.

[0125] The memory may include non-permanent memory in the form of computer-readable media, random access memory (RAM) and / or non-volatile memory such as read-only memory (ROM) or flash RAM. The memory is an example of computer-readable media.

[0126] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information by any method or technology. The 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 technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transitory 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 transitory media such as modulated data signals and carrier waves.

[0127] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0128] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0129] 1), The control method of the urea injection system for diesel vehicles in this application performs the first back-suction evacuation operation or the second back-suction evacuation operation at least according to the above-mentioned current ambient temperature and current ambient pressure, thereby achieving the purpose of performing the back-suction evacuation operation for a reasonable duration according to the actual working conditions, preventing the high-temperature exhaust gas in the exhaust pipe from corroding the nozzle and pipeline due to back-suction evacuation. Finally, according to the magnitude of the first recorded duration and the execution result of the back-suction evacuation operation, it is determined whether to perform the one-key remote back-suction operation, so as to further ensure that the exhaust pipe of the urea injection system will not freeze and will not cause the pipeline to burst, thus solving the problem that in existing diesel vehicles, even if enough time is left before cutting off the main power, there will still be a long-time back-suction evacuation that causes the high-temperature exhaust gas in the exhaust pipe to corrode the nozzle and pipeline.

[0130] 2), The control device of the urea injection system for diesel vehicles in this application performs the first back-suction evacuation operation or the second back-suction evacuation operation at least according to the above-mentioned current ambient temperature and current ambient pressure, thereby achieving the purpose of performing the back-suction evacuation operation for a reasonable duration according to the actual working conditions, preventing the high-temperature exhaust gas in the exhaust pipe from corroding the nozzle and pipeline due to back-suction evacuation. Finally, according to the magnitude of the first recorded duration and the execution result of the back-suction evacuation operation, it is determined whether to perform the one-key remote back-suction operation, so as to further ensure that the exhaust pipe of the urea injection system will not freeze and will not cause the pipeline to burst, thus solving the problem that in existing diesel vehicles, even if enough time is left before cutting off the main power, there will still be a long-time back-suction evacuation that causes the high-temperature exhaust gas in the exhaust pipe to corrode the nozzle and pipeline.

[0131] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A control method for a urea injection system of a diesel vehicle, characterized in that, Including: Obtain the ambient temperature and ambient pressure of the diesel vehicle's environment to get the current ambient temperature and the current ambient pressure; Perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure. The first back-suction evacuation operation is a back-suction evacuation operation carried out according to a preset time, and the duration of the back-suction evacuation operation in the second back-suction evacuation operation is less than the duration of the back-suction evacuation operation in the first back-suction evacuation operation; Determine a first recording duration, and determine whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction evacuation operation. The first recording duration is the duration between the diesel vehicle turning off the engine and cutting off the main power supply. The one-key remote back-suction operation means that when the diesel vehicle is started next time, the urea injection system is controlled to perform an emptying process, and the execution result of the back-suction evacuation operation is the execution result of performing the first back-suction evacuation operation or the second back-suction evacuation operation.

2. The method according to claim 1, wherein Perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, including: When the current ambient temperature is greater than or equal to the temperature threshold and the current ambient pressure is greater than or equal to the pressure threshold, perform the second back-suction evacuation operation; When the current ambient temperature is less than the temperature threshold and / or the current ambient pressure is less than the pressure threshold, perform the first back-suction evacuation operation.

3. The method according to claim 1, wherein Perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, including: When the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle, perform the second back-suction evacuation operation; When the first preset condition is satisfied, perform the first back-suction evacuation operation. The first preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, it is determined that the urea heating and thawing request has been received during the current driving cycle.

4. The method according to claim 1, wherein Perform a first back-suction evacuation operation or a second back-suction evacuation operation at least according to the current ambient temperature and the current ambient pressure, including: When the latitude information of the diesel vehicle is less than the latitude threshold, the current ambient temperature is greater than or equal to the temperature threshold, the current ambient pressure is greater than or equal to the pressure threshold, and it is determined that no urea heating and thawing request has been received during the current driving cycle, perform the second back-suction evacuation operation; When the second preset condition is satisfied, perform the first back-suction evacuation operation. The second preset condition includes at least one of the following: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, it is determined that the urea heating and thawing request has been received during the current driving cycle, the latitude information of the diesel vehicle is greater than or equal to the latitude threshold.

5. The method according to claim 1, characterized in that, Determine whether to perform a one-key remote back-suction operation according to the first recorded duration and the execution result of the back-suction and evacuation operation, including: Determine the minimum time limit value corresponding to the execution result of the back-suction and evacuation operation; When the first recorded duration is greater than or equal to the minimum time limit value, determine to perform the one-key remote back-suction operation; When the first recorded duration is less than the minimum time limit value and the execution result of the back-suction and evacuation operation is the execution result of performing the first back-suction and evacuation operation, determine that there is no need to perform the one-key remote back-suction operation; When the first recorded duration is less than the minimum time limit value and the execution result of the back-suction and evacuation operation is the execution result of performing the second back-suction and evacuation operation, determine that there is no need to perform the one-key remote back-suction operation.

6. The method according to claim 5, characterized in that, Before determining the first recorded duration, the method further includes: When the execution result of the back-suction and evacuation operation is the execution result of performing the second back-suction and evacuation operation, determine the second recorded duration, where the second recorded duration is the duration between the diesel vehicle turning off the engine and the current moment; When the second recorded duration is greater than or equal to the first time threshold, generate a first prompt message to prompt that the parking duration has timed out and it is recommended to perform the one-key remote back-suction operation; When the second recorded duration is less than the first time threshold, update the second recorded duration until the second recorded duration is greater than or equal to the first time threshold.

7. The method according to claim 5, wherein Before determining the first recorded duration, the method further includes: When the execution result of the back-suction and evacuation operation is the execution result of performing the first back-suction and evacuation operation, determine the second recorded duration, where the second recorded duration is the duration between the diesel vehicle turning off the engine and the current moment; When the second recorded duration is greater than or equal to the second time threshold, generate a second prompt message to prompt that the cut-off time of the main power supply does not meet the standard and it is recommended to perform the one-key remote back-suction operation; When the second recorded duration is less than the second time threshold, update the second recorded duration until the second recorded duration is greater than or equal to the second time threshold.

8. A control device for a urea injection system of a diesel vehicle, characterized in that, Including: An acquisition unit, configured to acquire the ambient temperature and ambient pressure of the environment where the diesel vehicle is located to obtain the current ambient temperature and current ambient pressure; A first processing unit, configured to perform a first back-suction and evacuation operation or a second back-suction and evacuation operation at least according to the current ambient temperature and current ambient pressure, where the first back-suction and evacuation operation is a back-suction and evacuation operation performed according to a preset time, and the duration of the back-suction and evacuation operation in the second back-suction and evacuation operation is less than the duration of the back-suction and evacuation operation in the first back-suction and evacuation operation; A second processing unit is configured to determine a first recording duration, and determine whether to perform a one-key remote back-suction operation according to the first recording duration and the execution result of the back-suction and evacuation operation. The first recording duration is the duration between the diesel vehicle turning off and the total power supply being cut off. The one-key remote back-suction operation means that in the case of starting the diesel vehicle next time, controlling the urea injection system to perform an emptying process. The execution result of the back-suction and evacuation operation is the execution result of performing the first back-suction and evacuation operation or the second back-suction and evacuation operation.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein when the program runs, it controls the device where the computer-readable storage medium is located to execute the method according to any one of claims 1 to 7.

10. A diesel vehicle system, characterized in that, Comprising: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors. The one or more programs include the method for executing any one of claims 1 to 7.

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