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

Abstract

The application provides a control method, device, medium and system of a urea injection system of a diesel vehicle. The method comprises: obtaining an ambient temperature and an ambient pressure of an environment in which the diesel vehicle is located to obtain a current ambient temperature and a current ambient pressure; performing a first back-suction emptying operation or a second back-suction emptying operation according to at least the current ambient temperature and the current ambient pressure, the first back-suction emptying operation being a back-suction emptying operation performed according to a preset time, and a time length of the back-suction emptying operation in the second back-suction emptying operation being shorter than that in the first back-suction emptying operation; determining a first recording time length, and determining whether to perform a one-key remote back-suction operation according to the first recording time length and a back-suction emptying operation execution result. The problem that even if sufficient time is left to disconnect the total power, long-time back-suction emptying will cause high-temperature exhaust gas in an exhaust pipe to corrode a nozzle and a pipeline is solved.

Description

Technical Field

[0001] This application relates to the field of exhaust aftertreatment technology, and more specifically, 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 Technology

[0002] Current diesel vehicles are equipped with urea injection systems, which inject urea into the exhaust pipe to chemically react with nitrogen oxides in the exhaust gas, thereby reducing pollutants. To prevent urea solution from freezing in the pipes and causing them to rupture, current diesel vehicles require a 30-90 second backflow purging process between engine shutdown and main power disconnection. However, many drivers, regardless of ambient temperature, sometimes directly shut off the engine and disconnect the main power without performing this backflow purging. Even with sufficient time before disconnecting the main power, the prolonged backflow purging can still lead to high-temperature exhaust gases corroding the nozzles and pipes. Summary of the Invention

[0003] The main objective of this 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 sufficient time is allowed before disconnecting the main power in existing diesel vehicles, there will still be a problem that the high temperature exhaust gas in the exhaust pipe will corrode the nozzles and pipes due to prolonged backflow and venting.

[0004] To achieve the above objectives, according to one aspect of this application, a control method for a urea injection system of a diesel vehicle is provided. The method includes: acquiring the ambient temperature and ambient pressure of the environment in which the diesel vehicle is located, and obtaining the current ambient temperature and current ambient pressure; performing a first back-suction purging operation or a second back-suction purging operation based at least on the current ambient temperature and current ambient pressure, wherein the first back-suction purging operation is a back-suction purging operation performed according to a preset time, and the duration of the back-suction purging operation in the second back-suction purging operation is less than the duration of the back-suction purging operation in the first back-suction purging operation; determining a first recording duration, and determining whether to perform a one-button remote back-suction operation based on the first recording duration and the execution result of the back-suction purging operation, wherein the first recording duration is the time from when the diesel vehicle is turned off to when the main power is cut off, and the one-button remote back-suction operation represents controlling the urea injection system to perform a purging process upon the next start of the diesel vehicle, and the execution result of the back-suction purging operation is the execution result of either the first back-suction purging operation or the second back-suction purging operation.

[0005] Optionally, at least based on the current ambient temperature and current ambient pressure, a first back-suction evacuation operation or a second back-suction evacuation operation may be performed, including: performing 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; and 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, at least based on the current ambient temperature and current ambient pressure, a first back-suction evacuation operation or a second back-suction evacuation operation may be performed, including: performing the second back-suction evacuation operation when the current ambient temperature is greater than or equal to a temperature threshold, the current ambient pressure is greater than or equal to a pressure threshold, and it is determined that no urea heating and defrosting request has been received during the current driving cycle; performing the first back-suction evacuation operation when a first preset condition is met, the first preset condition including 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 defrosting request has been received during the current driving cycle.

[0007] Optionally, at least based on the current ambient temperature and current ambient pressure, a first back-suction venting operation or a second back-suction venting operation is performed, including: performing the second back-suction venting operation when simultaneously satisfying the following conditions: the latitude information of the diesel vehicle is less than a latitude threshold, the current ambient temperature is greater than or equal to a temperature threshold, the current ambient pressure is greater than or equal to a pressure threshold, and it is determined that no urea heating and defrosting request has been received during the current driving cycle; performing the first back-suction venting operation when satisfying a second preset condition, the second preset condition including 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 defrosting 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-click remote backflow operation based on the first recording duration and the result of the backflow and emptying operation includes: determining a minimum time limit corresponding to the result of the backflow and emptying operation; determining to perform the one-click remote backflow operation if the first recording duration is less than the minimum time limit; determining that the one-click remote backflow operation is not required if the first recording duration is greater than or equal to the minimum time limit and the result of the backflow and emptying operation is the result of performing the first backflow and emptying operation; and determining that the one-click remote backflow operation is not required if the first recording duration is greater than or equal to the minimum time limit and the result of the backflow and emptying operation is the result of performing the second backflow and emptying operation.

[0009] Optionally, before determining the first recording duration, the method further includes: if the result of the back-suction evacuation operation is the result of executing the second back-suction evacuation operation, determining a second recording duration, wherein the second recording duration is the duration of the diesel vehicle from being turned off to the current moment; if the second recording duration is greater than or equal to a first time threshold, generating a first prompt message to indicate that the parking time has expired and suggesting the execution of the one-click remote back-suction operation; if 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.

[0010] Optionally, before determining the first recording duration, the method further includes: if the result of the backflow evacuation operation is the same as the result of executing the first backflow evacuation operation, determining a second recording duration, wherein the second recording duration is the duration from when the diesel vehicle is turned off to the current time; if the second recording duration is greater than or equal to a second time threshold, generating a second prompt message to indicate that the total power supply cut-off time has not met the standard and suggesting the execution of the one-click remote backflow operation; if 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.

[0011] According to another aspect of this application, a control device for a urea injection system of a diesel vehicle is provided, comprising: an acquisition unit for acquiring the ambient temperature and ambient pressure of the environment in which the diesel vehicle is located, and obtaining the current ambient temperature and current ambient pressure; a first processing unit for performing a first back-suction purging operation or a second back-suction purging operation at least according to the current ambient temperature and current ambient pressure, wherein the first back-suction purging operation is a back-suction purging operation performed according to a preset time, and the duration of the back-suction purging operation in the second back-suction purging operation is less than the duration of the back-suction purging operation in the first back-suction purging operation; and a second processing unit for determining a first recording duration, and determining whether to perform a one-button remote back-suction operation based on the first recording duration and the execution result of the back-suction purging operation, wherein the first recording duration is the duration from when the diesel vehicle is turned off to when the main power is cut off, the one-button remote back-suction operation represents controlling the urea injection system to perform a purging process when the diesel vehicle is started again, and the execution result of the back-suction purging operation is the execution result of performing the first back-suction purging operation or the second back-suction purging operation.

[0012] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform any of the methods described.

[0013] According to another aspect of this application, a diesel vehicle system is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing any one of the methods described.

[0014] By applying the technical solution of this application, a first back-suction venting operation or a second back-suction venting operation is performed based on at least the current ambient temperature and current ambient pressure. This achieves the purpose of performing back-suction venting operations for a reasonable duration according to actual working conditions, preventing high-temperature exhaust gas in the exhaust pipe from corroding the nozzles and pipes due to back-suction venting. Finally, based on the length of the first recorded duration and the execution result of the back-suction venting operation, it is determined whether to perform a one-click remote back-suction operation. This further ensures that the exhaust pipe of the urea injection system will not freeze or cause the pipes to burst. This solves the problem that even if sufficient time is allowed before disconnecting the main power in existing diesel vehicles, prolonged back-suction venting can still cause high-temperature exhaust gas in the exhaust pipe to corrode the nozzles and pipes. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

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

[0017] Figure 2 A flowchart illustrating a first specific implementation of a first back-suction evacuation operation or a second back-suction evacuation operation, based at least on the current ambient temperature and current ambient pressure, is shown according to an embodiment of this application.

[0018] Figure 3 A flowchart illustrating a second specific implementation of an embodiment according to the present application, which performs a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and current ambient pressure;

[0019] Figure 4 A flowchart illustrating a third specific implementation of an embodiment according to the present application, which performs a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and current ambient pressure;

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

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

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] As described in the background section, existing diesel vehicles are equipped with urea injection systems to inject urea into the exhaust pipe to chemically react with nitrogen oxides in the exhaust gas, thereby reducing pollutants in the exhaust. To prevent urea solution residue in the pipes from freezing and causing pipe rupture, current diesel vehicles require a 30-90 second back-draft purging operation of the urea injection system between engine shutdown and main power disconnection. However, many drivers, regardless of ambient temperature, sometimes directly shut off the engine and disconnect the main power without performing the back-draft purging operation. To address the problem that even with sufficient time before disconnecting the main power, existing diesel vehicles still experience prolonged back-draft purging, leading to high-temperature exhaust gas in the exhaust pipe corroding the nozzles and pipes, embodiments of this application provide a control method for a urea injection system in a diesel vehicle, a control device for a urea injection system in a diesel vehicle, a computer-readable storage medium, and a diesel vehicle system.

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

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

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

[0029] Step S101: Obtain the ambient temperature and ambient pressure of the environment where the diesel vehicle is located, and obtain the current ambient temperature and current ambient pressure;

[0030] The ambient pressure is the detected value of the atmospheric pressure of the environment in which the diesel vehicle is located. The current ambient temperature and current ambient pressure are collected using temperature and pressure sensors.

[0031] Temperature sensor installation location:

[0032] Intake manifold: Temperature sensors can be installed in the intake manifold of diesel vehicles to detect the ambient temperature during vehicle operation. This location can directly reflect the temperature conditions of the external environment where the vehicle is located.

[0033] Near the urea injection system: Installing temperature sensors near the urea injection system, such as near the urea tank, urea pump, or nozzle, allows for monitoring of the system's operating temperature. This is particularly important for assessing the risk of evaporation and crystallization of the urea solution at different temperatures. Furthermore, monitoring the temperature inside the urea tank helps determine whether heating for thawing is necessary, especially in low-temperature environments.

[0034] Vehicle exterior surfaces: Temperature sensors installed on the vehicle's exterior surfaces, such as near the front grille or side skirts, can acquire information about the temperature of the external environment. This installation method is suitable for situations requiring monitoring of the ambient temperature around the vehicle.

[0035] Pressure sensor installation location:

[0036] Exhaust System: Pressure sensors can be installed in the exhaust system of diesel vehicles, such as in the exhaust pipe near the exhaust outlet, to measure exhaust back pressure. While this primarily reflects the pressure state of the engine exhaust, it can also reflect changes in external pressure to some extent, especially in areas with significant altitude variations.

[0037] Vehicle exterior: Installing pressure sensors on the exterior of the vehicle, such as on the roof or under the vehicle near the ground, allows for more direct measurement of ambient atmospheric pressure. This method is particularly suitable for intelligent systems that require accurate ambient pressure data to assess the necessity of backflow evacuation operations in the urea injection system.

[0038] Urea injection system: Pressure sensors 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 status of the urea solution flow. This helps to assess the system's operating conditions and the efficiency of the backflow operation.

[0039] Step S102: At least based on the current ambient temperature and current ambient pressure, perform a first back suction and venting operation or a second back suction and venting operation. The first back suction and venting operation is a back suction and venting operation performed according to a preset time. The duration of the back suction and venting operation in the second back suction and venting operation is less than the duration of the back suction and venting operation in the first back suction and venting operation.

[0040] The preset time is 30~90 seconds.

[0041] Step S103: Determine the first recording duration, and based on the first recording duration and the result of the back suction and purging operation, determine whether to execute the one-key remote back suction operation. The first recording duration is the time between the diesel vehicle being turned off and the main power being cut off. The one-key remote back suction operation indicates that when the diesel vehicle is started again, the urea injection system is controlled to perform a purging process. The result of the back suction and purging operation is the result of executing either the first back suction and purging operation or the second back suction and purging operation.

[0042] In the above steps, by performing either the first or second back-suction evacuation operation based on the current ambient temperature and pressure, the purpose of performing back-suction evacuation operation for a reasonable duration according to the actual working conditions is achieved. This prevents the high-temperature exhaust gas in the exhaust pipe from corroding the nozzles and pipes due to back-suction evacuation. Finally, based on the duration of the first recorded operation and the result of the back-suction evacuation operation, it is determined whether to perform a one-click remote back-suction operation. This further ensures that the exhaust pipe of the urea injection system will not freeze or cause the pipes to burst. This solves the problem that even if sufficient time is allowed before disconnecting the main power in existing diesel vehicles, the high-temperature exhaust gas in the exhaust pipe will corrode the nozzles and pipes due to prolonged back-suction evacuation.

[0043] Among them, such as Figure 2 As shown, step S102, which involves performing either a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and 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 venting 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: If 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 venting operation.

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

[0049] The first scenario: The current ambient temperature is less than the temperature threshold, and the current ambient pressure is less than the pressure threshold.

[0050] The second scenario: The current ambient temperature is greater than or equal to the temperature threshold, and the current ambient pressure is less than the pressure threshold.

[0051] The third scenario: The current ambient temperature is less than the temperature threshold, and the current ambient pressure is greater than or equal to the pressure threshold.

[0052] Specifically, when the ambient temperature is 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 less likely to crystallize. Simultaneously, the temperature in the exhaust pipe is also relatively high. Prolonged backdrafting makes the nozzles and pipes more susceptible to corrosion from the high-temperature exhaust gas, accelerating material aging. By implementing a shorter backdrafting time, residual urea in the nozzles can be discharged while reducing the negative impact of high-temperature exhaust gas on system components. In low ambient temperatures, if urea solution remains in the system, it may freeze and cause pipe rupture. Implementation of a longer backdrafting time ensures complete evacuation of residual urea from the system, avoiding the risk of freezing in low-temperature environments. By assessing the ambient pressure, the special conditions of high-altitude environments can be considered. Lower air pressure in high-altitude areas may affect the normal operation of the urea injection system. Implementation of a longer backdrafting operation ensures that the system is fully emptied even in low-pressure environments, preventing malfunctions. For vehicles that frequently travel in areas with significant temperature and pressure variations, this strategy can automatically adjust the backdrafting time according to real-time environmental conditions, ensuring normal system operation, avoiding unnecessary energy waste, improving user experience, and enhancing vehicle operating efficiency.

[0053] Among them, such as Figure 3 As shown, step S102, which involves performing either a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and current ambient pressure, includes the following steps:

[0054] Step S301: If 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 defrosting request is received during the current driving cycle, the second back suction and venting operation is performed.

[0055] Step S302: Under the condition that the first preset condition is met, the first back suction and venting operation is performed. 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, or it is determined that the urea heating and thawing request has been received during the current driving cycle.

[0056] The aforementioned first preset condition may include the following situations:

[0057] Example 1: The current ambient temperature is lower than the temperature threshold, and the current ambient pressure is lower than the pressure threshold, and it is determined that the urea heating and defrosting request has been received during the current driving cycle.

[0058] Example 2 scenario: The current ambient temperature is lower than the temperature threshold, and the current ambient pressure is lower than the pressure threshold, and it is determined that no urea heating and defrosting request was received during the current driving cycle;

[0059] By comprehensively considering ambient temperature, ambient pressure, and vehicle operating status (whether a urea heating / thawing request has been received), a more holistic assessment is made as to whether the urea injection system requires prolonged backflow evacuation under current conditions to prevent crystallization or icing. Precisely determining whether to perform prolonged backflow avoids unnecessary extensions of the backflow time, reducing energy consumption, and also prevents system malfunctions caused by insufficient backflow when needed. Urea heating / thawing requests typically indicate that the system is operating in a low-temperature environment, potentially posing a crystallization risk. Therefore, if such a request is received during the current driving cycle, performing prolonged backflow can effectively prevent nozzle and pipe blockage, improving the overall system safety and reliability. Through communication with the cloud, not only can environmental parameters be monitored in real time, but more rational and dynamic decisions can also be made based on historical data and the current vehicle status. This enhances the vehicle's intelligent connectivity capabilities, enabling it to better adapt to different operating environments and conditions.

[0060] Among them, such as Figure 4 As shown, step S102, which involves performing either a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and current ambient pressure, includes the following steps:

[0061] Step S401: If 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 defrosting request is received during the current driving cycle, the second back suction venting operation is performed.

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

[0063] Step S402: Under the condition that the second preset condition is met, the first back suction venting operation is performed. 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 defrosting 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.

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

[0065] Example 3: 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 defrosting 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.

[0066] Example 4: 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 no urea heating and defrosting request was received during the current driving cycle, and the latitude information of the diesel vehicle is greater than or equal to the latitude threshold.

[0067] At least based on the aforementioned current ambient temperature and pressure, a specific use case for performing either the first or second reverse suction evacuation operation is as follows: A diesel vehicle is performing a long-distance transport mission in winter. The ambient temperature drops sharply to below -10°C, the ambient pressure remains at a standard level, and the vehicle is located in a high-latitude region (above a set latitude threshold, such as 45°N), meaning the vehicle is in a cold environment. At the end of a driving cycle, the ECU receives a request to heat and defrost the urea, indicating that the system has encountered low-temperature conditions during operation.

[0068] Based on the aforementioned current ambient temperature and pressure, the system performs either a first back-suction purging operation or a second back-suction purging operation in a specific scenario: Since the current ambient temperature is below a threshold and the vehicle's latitude is above a threshold, and the ECU receives a request to heat and defrost the urea, one of the aforementioned second preset conditions is met. Therefore, after the vehicle is turned off, a first back-suction purging operation lasting 30-90 seconds (i.e., a preset time) is performed to ensure that the urea solution in the system is completely emptied, preventing crystallization that could clog the nozzles or cause the pipes to freeze and rupture under extremely cold conditions.

[0069] Based on the aforementioned current ambient temperature and pressure, the beneficial effects of performing either the first or second back-suction evacuation operation in a specific scenario are as follows: Prolonged back-suction evacuation ensures the complete removal of liquid from the system, significantly reducing the risk of urea solution crystallization or freezing under extremely cold conditions; it effectively avoids unexpected shutdowns caused by system freezing, ensuring safe vehicle operation in harsh environments and reducing maintenance costs and downtime; the addition of latitude information allows the system to automatically adjust its back-suction strategy based on geographical location, making it particularly suitable for long-distance transportation across multiple climate zones, demonstrating the system's intelligence and adaptability; drivers know the vehicle is equipped with technology capable of coping with extreme climates, increasing their confidence in the vehicle's performance, especially during long-distance transportation missions in cold conditions.

[0070] In one embodiment of this application, determining whether to execute a one-click remote backflow operation based on the first recording duration and the result of the backflow and emptying operation includes: determining a minimum time limit corresponding to the result of the backflow and emptying operation; determining to execute the one-click remote backflow operation if the first recording duration is less than the minimum time limit; determining that the one-click remote backflow operation is not required if the first recording duration is greater than or equal to the minimum time limit and the result of the backflow and emptying operation is the result of executing the first backflow and emptying operation; and determining that the one-click remote backflow operation is not required if the first recording duration is greater than or equal to the minimum time limit and the result of the backflow and emptying operation is the result of executing the second backflow and emptying operation.

[0071] In determining the minimum time limit corresponding to the execution result of the above-mentioned back suction and emptying operation, the minimum time limit for the first back suction and emptying operation is 30 seconds, and the minimum time limit for the second back suction and emptying operation is 5 seconds.

[0072] Specifically, based on the first recorded duration and the result of the back-suction evacuation operation, a specific use case for determining whether to perform the one-click remote back-suction operation is as follows: A diesel vehicle equipped with this application is operating in a city during the summer. The ambient temperature is 35°C, the ambient pressure is at a standard level (approximately 1013 hPa), and the vehicle is located in a low-latitude area (below the set latitude threshold, such as 30° North). Therefore, the second back-suction evacuation operation (i.e., 5 seconds of back-suction) is performed when the engine is turned off. However, the driver immediately cuts off the vehicle's main power supply after turning off the engine, and this operation lasts only 2 seconds, which is significantly less than the minimum time limit set by the system (e.g., 5 seconds).

[0073] Based on the first recorded duration and the result of the back-suction purging operation, a specific use case for determining whether to execute the one-click remote back-suction operation is as follows: Since the vehicle performed the second back-suction purging operation (i.e., a shorter 5-second back-suction) after being turned off, and the recorded time from engine shutdown to power cut-off (first recorded duration) is less than the minimum time limit of 5 seconds, the system determines that the driver disconnected the power too quickly, posing a risk that the urea solution may not have been completely emptied. In this situation, the cloud platform calculates the time from engine shutdown to power cut-off based on the message information received by the driving companion or T-BOX (Telematics Box, a key component in the vehicle networking system, mainly used to realize wireless communication between the vehicle and external networks) hardware devices. Upon recognizing insufficient time, it automatically sends a warning message to the driver via the mobile app, suggesting that they immediately perform the one-click remote back-suction operation to ensure that the urea solution inside the urea injection system is completely emptied.

[0074] T-BOX and Driving Companion: This is a hardware device that plugs into the vehicle to continuously send monitored data streams to a cloud platform. The returned cloud data can be used by developers for strategy mining and data analysis.

[0075] Based on the first recorded duration and the execution result of the back-suction evacuation operation, the beneficial effects of determining whether to perform a one-click remote back-suction operation in a specific use case are as follows: The immediate suggestion for one-click remote back-suction avoids the risk of urea solution not being completely emptied due to premature power failure, thus preventing urea crystallization in the pipeline and ensuring the long-term reliability and stability of the system; by providing early warnings and recommending the execution of one-click remote back-suction, drivers can take timely measures to avoid potential damage to nozzles and pipelines caused by urea crystallization, reducing maintenance costs and the frequency of system failures; the cloud platform can intelligently adjust and recommend operations based on real-time vehicle status and environmental conditions, enabling vehicles to automatically adapt to different operating environments, reducing the driver's operational burden and improving the system's intelligent management level; drivers and fleet managers receive early warnings and suggestions through a mobile app, allowing them to experience the system's precise control over details and proactive warnings of potential risks, enhancing their trust and reliance on the vehicle's intelligent system and improving operational efficiency.

[0076] In one embodiment of this application, before determining the first recording duration, the method further includes: determining a second recording duration when the result of the reverse suction and evacuation operation is the result of executing the second reverse suction and evacuation operation, wherein the second recording duration is the duration from when the diesel vehicle is turned off to the current time; generating a first prompt message when the second recording duration is greater than or equal to a first time threshold to indicate that the parking time has expired and to suggest performing the one-click remote reverse suction operation; and updating 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.

[0077] When the parking time has not reached the threshold, the system patiently updates the second recorded duration, avoiding unnecessary back-suction operations. This helps reduce the corrosion of nozzles and pipelines by high-temperature exhaust gases when the ambient temperature is high, while saving energy when the temperature is suitable. This demonstrates the intelligent system's precise control and adaptive adjustment of maintenance strategies, improving the level of intelligence in vehicle maintenance. The timely suggestion of one-click remote back-suction operation not only prevents clogging of the urea injection system but also reduces the risk of system damage caused by improper maintenance. This helps improve the reliability and service life of the injection system, reduces the number of repairs and costs caused by system failures, and has a significant impact on the overall maintenance cost control and operational efficiency improvement of the vehicle.

[0078] In one embodiment of this application, before determining the first recording duration, the method further includes: if the result of the backflow evacuation operation is the same as the result of the first backflow evacuation operation, determining a second recording duration, wherein the second recording duration is the duration from when the diesel vehicle is turned off to the current time; if the second recording duration is greater than or equal to a second time threshold, generating a second prompt message to indicate that the total power supply cut-off time has not met the standard and suggesting the execution of the one-click remote backflow operation; if 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 recorded duration—the time from vehicle shutdown to the current moment—the system ensures that the urea injection system has been adequately purged under low temperatures or specific environmental conditions. This is crucial for preventing urea crystallization in the nozzles and pipes, ensuring system integrity and injection efficiency. When the second recorded duration exceeds or equals a second time threshold, a second warning message is generated, promptly alerting the driver to discrepancies between the main power cut-off time and the standard, and recommending a one-button remote backflow procedure. This intelligent warning mechanism helps prevent urea injection system blockage, reducing future maintenance needs and potential system failures. Continuously updating the second recorded duration and sending warnings when thresholds are reached not only directly guides users to take appropriate actions but also indirectly educates them on the importance of proper maintenance, especially vehicle operation knowledge under complex environmental conditions, enhancing their self-maintenance capabilities.

[0081] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the control method for the urea injection system of a diesel vehicle of this application will be described in detail below with reference to specific embodiments.

[0082] This embodiment relates to a specific control method for a urea injection system in a diesel vehicle, such as... Figure 5 As shown, it includes:

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

[0084] If the following conditions are met simultaneously: the latitude 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 no urea heating / thawing request is received during the current driving cycle, then a second back-suction venting operation is performed. If the following conditions are met: the current ambient temperature is less than the temperature threshold, the current ambient pressure is less than the pressure threshold, a urea heating / thawing request is received during the current driving cycle, and the latitude of the diesel vehicle is greater than or equal to the latitude threshold, then a first back-suction venting operation is performed according to a preset time (i.e., a 30-90s back-suction venting operation). The duration of the back-suction venting operation in the second back-suction venting operation is less than the duration of the back-suction venting operation in the first back-suction venting operation (i.e., a 5-second back-suction venting operation).

[0085] Based on the first recording duration, the result of the back suction and emptying operation, and the second recording duration, determine whether to execute the one-click remote back suction operation.

[0086] That is, the first recording duration is determined, and based on the first recording duration and the result of the back suction and purging operation, it is determined whether to execute the one-key remote back suction operation. The first recording duration is the time between the diesel vehicle being turned off and the main power being cut off. The one-key remote back suction operation indicates that when the diesel vehicle is started again, the urea injection system is controlled to perform a purging process. The result of the back suction and purging operation is the result of executing the first back suction and purging operation or the second back suction and purging operation.

[0087] Specifically, determine the minimum time limit corresponding to the execution result of the back suction and emptying operation; if the duration of the first record is less than the minimum time limit, determine to execute the one-click remote back suction operation; if the duration of the first record is greater than or equal to the minimum time limit, and the execution result of the back suction and emptying operation is the same as the execution result of the first back suction and emptying operation, determine that the one-click remote back suction operation is not required; if the duration of the first record is greater than or equal to the minimum time limit, and the execution result of the back suction and emptying operation is the same as the execution result of the second back suction and emptying operation, determine that the one-click remote back suction operation is not required.

[0088] Before determining the first recording duration, if the result of the back-suction evacuation operation is the same as the result of the second back-suction evacuation operation, a second recording duration is determined. The second recording duration is the time from when the diesel vehicle is turned off to the current moment. If the second recording duration is greater than or equal to the first time threshold, a first prompt message is generated to indicate that the parking time has expired and to suggest performing a one-click remote back-suction operation. If the second recording duration is less than the first time threshold, the second recording duration is updated until the second recording duration is greater than or equal to the first time threshold.

[0089] Before determining the first recording duration, if the result of the back suction and evacuation operation is the same as the result of the first back suction and evacuation operation, a second recording duration is determined. The second recording duration is the time from when the diesel vehicle is turned off to the current moment. If the second recording duration is greater than or equal to the second time threshold, a second prompt message is generated to indicate that the main power cut-off time has not met the standard and to suggest performing a one-click remote back suction operation. If the second recording duration is less than the second time threshold, the second recording duration is updated 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 in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0091] This 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 a diesel vehicle in this application can be used to execute the control method for the urea injection system of a diesel vehicle provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0092] The control device for the urea injection system of a diesel vehicle provided in the embodiments of this application is described below.

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

[0094] The acquisition unit 61 is used to acquire the ambient temperature and ambient pressure of the environment where the diesel vehicle is located, and obtain the current ambient temperature and current ambient pressure; the first processing unit 62 is used to execute a first back-suction purging operation or a second back-suction purging operation based at least on the current ambient temperature and current ambient pressure, wherein the first back-suction purging operation is a back-suction purging operation performed according to a preset time, and the duration of the back-suction purging operation in the second back-suction purging operation is less than the duration of the back-suction purging operation in the first back-suction purging operation; the second processing unit 63 is used to determine a first recording duration, and determine whether to execute a one-key remote back-suction operation based on the first recording duration and the execution result of the back-suction purging operation, wherein the first recording duration is the duration from when the diesel vehicle is turned off to when the main power is cut off, and the one-key remote back-suction operation represents controlling the urea injection system to perform a purging process when the diesel vehicle is started again, and the execution result of the back-suction purging operation is the execution result of the first back-suction purging operation or the second back-suction purging operation.

[0095] In one embodiment of this application, the first processing unit includes a first processing module and a second processing module. The first processing module is used 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 used 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 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 less likely to crystallize. Simultaneously, the temperature in the exhaust pipe is also relatively high. Prolonged backdrafting makes the nozzles and pipes more susceptible to corrosion from the high-temperature exhaust gas, accelerating material aging. By implementing a shorter backdrafting time, residual urea in the nozzles can be discharged while reducing the negative impact of high-temperature exhaust gas on system components. In low ambient temperatures, if urea solution remains in the system, it may freeze and cause pipe rupture. Implementation of a longer backdrafting time ensures complete evacuation of residual urea from the system, avoiding the risk of freezing in low-temperature environments. By assessing the ambient pressure, the special conditions of high-altitude environments can be considered. Lower air pressure in high-altitude areas may affect the normal operation of the urea injection system. Implementation of a longer backdrafting operation ensures that the system is fully emptied even in low-pressure environments, preventing malfunctions. For vehicles that frequently travel in areas with significant temperature and pressure variations, this strategy can automatically adjust the backdrafting time according to real-time environmental conditions, ensuring normal system operation, avoiding unnecessary energy waste, improving user experience, and enhancing vehicle operating efficiency.

[0097] In one embodiment of this application, the first processing unit includes a third processing module and a fourth processing module. The third processing module is used to perform the second back-suction venting operation when the current ambient temperature is greater than or equal to a temperature threshold, the current ambient pressure is greater than or equal to a 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 used to perform the first back-suction venting 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] By comprehensively considering ambient temperature, ambient pressure, and vehicle operating status (whether a urea heating / thawing request has been received), a more holistic assessment is made as to whether the urea injection system requires prolonged backflow evacuation under current conditions to prevent crystallization or icing. Precisely determining whether to perform prolonged backflow avoids unnecessary extensions of the backflow time, reducing energy consumption, and also prevents system malfunctions caused by insufficient backflow when needed. Urea heating / thawing requests typically indicate that the system is operating in a low-temperature environment, potentially posing a crystallization risk. Therefore, if such a request is received during the current driving cycle, performing prolonged backflow can effectively prevent nozzle and pipe blockage, improving the overall system safety and reliability. Through communication with the cloud, not only can environmental parameters be monitored in real time, but more rational and dynamic decisions can also be made based on historical data and the current vehicle status. This enhances the vehicle's intelligent connectivity capabilities, enabling it to better adapt to different operating environments and conditions.

[0099] In one embodiment of this application, the first processing unit includes a fifth processing module and a sixth processing module. The fifth processing module is used to perform the second back-suction venting operation when the following conditions are met simultaneously: the latitude information of the diesel vehicle is less than a latitude threshold, the current ambient temperature is greater than or equal to a temperature threshold, the current ambient pressure is greater than or equal to a pressure threshold, and it is determined that no urea heating and defrosting request has been received during the current driving cycle. The sixth processing module is used to perform the first back-suction venting operation when the following conditions are met: 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 defrosting 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] At least based on the aforementioned current ambient temperature and pressure, a specific use case for performing either the first or second reverse suction evacuation operation is as follows: A diesel vehicle is performing a long-distance transport mission in winter. The ambient temperature drops sharply to below -10°C, the ambient pressure remains at a standard level, and the vehicle is located in a high-latitude region (above a set latitude threshold, such as 45°N), meaning the vehicle is in a cold environment. At the end of a driving cycle, the ECU receives a request to heat and defrost the urea, indicating that the system has encountered low-temperature conditions during operation.

[0101] Based on the aforementioned current ambient temperature and pressure, the system performs either a first back-suction purging operation or a second back-suction purging operation in a specific scenario: Since the current ambient temperature is below a threshold and the vehicle's latitude is above a threshold, and the ECU receives a request to heat and defrost the urea, one of the aforementioned second preset conditions is met. Therefore, after the vehicle is turned off, a first back-suction purging operation lasting 30-90 seconds (i.e., a preset time) is performed to ensure that the urea solution in the system is completely emptied, preventing crystallization that could clog the nozzles or cause the pipes to freeze and rupture under extremely cold conditions.

[0102] Based on the aforementioned current ambient temperature and pressure, the beneficial effects of performing either the first or second back-suction evacuation operation in a specific scenario are as follows: Prolonged back-suction evacuation ensures the complete removal of liquid from the system, significantly reducing the risk of urea solution crystallization or freezing under extremely cold conditions; it effectively avoids unexpected shutdowns caused by system freezing, ensuring safe vehicle operation in harsh environments and reducing maintenance costs and downtime; the addition of latitude information allows the system to automatically adjust its back-suction strategy based on geographical location, making it particularly suitable for long-distance transportation across multiple climate zones, demonstrating the system's intelligence and adaptability; drivers know the vehicle is equipped with technology capable of coping with extreme climates, increasing their confidence in the vehicle's performance, especially during long-distance transportation missions in cold conditions.

[0103] In one embodiment of this application, the second processing unit includes a first determining module, a second determining module, a third determining module, and a fourth determining module. The first determining module is used to determine the minimum time limit corresponding to the execution result of the above-mentioned backflow and emptying operation. The second determining module is used to determine to execute the above-mentioned one-click remote backflow and emptying operation when the duration of the first record is less than the minimum time limit. The third determining module is used to determine that the above-mentioned one-click remote backflow and emptying operation does not need to be executed when the duration of the first record is greater than or equal to the minimum time limit and the execution result of the above-mentioned backflow and emptying operation is the execution result of the above-mentioned first backflow and emptying operation. The fourth determining module is used to determine that the above-mentioned one-click remote backflow and emptying operation does not need to be executed when the duration of the first record is greater than or equal to the minimum time limit and the execution result of the above-mentioned backflow and emptying operation is the execution result of the above-mentioned second backflow and emptying operation.

[0104] Specifically, based on the first recorded duration and the result of the back-suction evacuation operation, a specific use case for determining whether to perform the one-click remote back-suction operation is as follows: A diesel vehicle equipped with this application is operating in a city during the summer. The ambient temperature is 35°C, the ambient pressure is at a standard level (approximately 1013 hPa), and the vehicle is located in a low-latitude area (below the set latitude threshold, such as 30° North). Therefore, the second back-suction evacuation operation (i.e., 5 seconds of back-suction) is performed when the engine is turned off. However, the driver immediately cuts off the vehicle's main power supply after turning off the engine, and this operation lasts only 2 seconds, which is significantly less than the minimum time limit set by the system (e.g., 5 seconds).

[0105] Based on the first recorded duration and the result of the back-suction purging operation, a specific use case for determining whether to execute the one-click remote back-suction operation is as follows: Since the vehicle performed the second back-suction purging operation (i.e., a shorter 5-second back-suction) after being turned off, and the recorded time from engine shutdown to power cut-off (first recorded duration) is less than the minimum time limit of 5 seconds, the system determines that the driver disconnected the power too quickly, posing a risk that the urea solution may not have been completely emptied. In this situation, the cloud platform calculates the time from engine shutdown to power cut-off based on the message information received by the driving companion or T-BOX (Telematics Box, a key component in the vehicle networking system, mainly used to realize wireless communication between the vehicle and external networks) hardware devices. Upon recognizing insufficient time, it automatically sends a warning message to the driver via the mobile app, suggesting that they immediately perform the one-click remote back-suction operation to ensure that the urea solution inside the urea injection system is completely emptied.

[0106] Based on the first recorded duration and the execution result of the back-suction evacuation operation, the beneficial effects of determining whether to perform a one-click remote back-suction operation in a specific use case are as follows: The immediate suggestion for one-click remote back-suction avoids the risk of urea solution not being completely emptied due to premature power failure, thus preventing urea crystallization in the pipeline and ensuring the long-term reliability and stability of the system; by providing early warnings and recommending the execution of one-click remote back-suction, drivers can take timely measures to avoid potential damage to nozzles and pipelines caused by urea crystallization, reducing maintenance costs and the frequency of system failures; the cloud platform can intelligently adjust and recommend operations based on real-time vehicle status and environmental conditions, enabling vehicles to automatically adapt to different operating environments, reducing the driver's operational burden and improving the system's intelligent management level; drivers and fleet managers receive early warnings and suggestions through a mobile app, allowing them to experience the system's precise control over details and proactive warnings of potential risks, enhancing their trust and reliance on the vehicle's intelligent system and improving operational efficiency.

[0107] In one embodiment of this application, the device further includes a first determining unit, a first generating unit, and a first updating unit. The first determining unit is configured to determine a second recording duration before determining a first recording duration, provided that the result of the second back-suction and emptying operation is the result of executing the second back-suction and emptying operation. The second recording duration is the duration from when the diesel vehicle is turned off to the current time. The first generating unit is configured to generate a first prompt message when the second recording duration is greater than or equal to a first time threshold, to indicate that the parking time has expired and to suggest performing the one-click remote back-suction operation. The first updating 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 time has not reached the threshold, the system patiently updates the second recorded duration, avoiding unnecessary back-suction operations. This helps reduce the corrosion of nozzles and pipelines by high-temperature exhaust gases when the ambient temperature is high, while saving energy when the temperature is suitable. This demonstrates the intelligent system's precise control and adaptive adjustment of maintenance strategies, improving the level of intelligence in vehicle maintenance. The timely suggestion of one-click remote back-suction operation not only prevents clogging of the urea injection system but also reduces the risk of system damage caused by improper maintenance. This helps improve the reliability and service life of the injection system, reduces the number of repairs and costs caused by system failures, and has a significant impact on the overall maintenance cost control and operational efficiency improvement of the vehicle.

[0109] In one embodiment of this application, the device further includes a second determining unit, a second generating unit, and a second updating unit. The second determining unit is used to determine a second recording duration before determining the first recording duration, provided that the result of the backflow evacuation operation is the same as the result of the first backflow evacuation operation. The second recording duration is the duration from when the diesel vehicle is turned off to the current time. The second generating unit is used to generate a second prompt message when the second recording duration is greater than or equal to a second time threshold, indicating that the total power supply cut-off time has not met the standard and suggesting the execution of the one-button remote backflow operation. The second updating unit is used 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 recorded duration—the time from vehicle shutdown to the current moment—the system ensures that the urea injection system has been adequately purged under low temperatures or specific environmental conditions. This is crucial for preventing urea crystallization in the nozzles and pipes, ensuring system integrity and injection efficiency. When the second recorded duration exceeds or equals a second time threshold, a second warning message is generated, promptly alerting the driver to discrepancies between the main power cut-off time and the standard, and recommending a one-button remote backflow procedure. This intelligent warning mechanism helps prevent urea injection system blockage, reducing future maintenance needs and potential system failures. Continuously updating the second recorded duration and sending warnings when thresholds are reached not only directly guides users to take appropriate actions but also indirectly educates them on the importance of proper maintenance, especially vehicle operation knowledge under complex environmental conditions, enhancing their self-maintenance capabilities.

[0111] The control device for the urea injection system of the aforementioned diesel vehicle includes a processor and a memory. The acquisition unit, the first processing unit, and the second processing unit are all stored as program units in the memory. The processor executes these program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; alternatively, the modules may be located in different processors in any combination.

[0112] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured. By adjusting kernel parameters, the problem of prolonged backflow and exhaust in diesel vehicles, even with sufficient time allowed before power is cut off, which causes high-temperature exhaust gases to corrode nozzles and pipes, can be addressed.

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

[0114] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform a control method for the urea injection system of the diesel vehicle.

[0115] This invention provides a processor for running a program, wherein the program executes a control method for the urea injection system of a diesel vehicle.

[0116] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps: acquiring the ambient temperature and ambient pressure of the environment where the diesel vehicle is located, and obtaining the current ambient temperature and current ambient pressure; performing either a first back-suction purging operation or a second back-suction purging operation based at least on the current ambient temperature and current ambient pressure, wherein the first back-suction purging operation is a back-suction purging operation performed according to a preset time, and the duration of the back-suction purging operation in the second back-suction purging operation is less than the duration of the back-suction purging operation in the first back-suction purging operation; determining a first recorded duration, and determining whether to perform a one-button remote back-suction operation based on the first recorded duration and the execution result of the back-suction purging operation, wherein the first recorded duration is the time from when the diesel vehicle is turned off to when the main power is cut off, and the one-button remote back-suction operation represents controlling the urea injection system to perform a purging process when the diesel vehicle is started again, and the execution result of the back-suction purging operation is the execution result of either the first back-suction purging operation or the second back-suction purging operation. The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0117] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps: obtaining the ambient temperature and ambient pressure of the environment where the diesel vehicle is located, and obtaining the current ambient temperature and current ambient pressure; performing a first back-suction purging operation or a second back-suction purging operation based at least on the current ambient temperature and current ambient pressure, wherein the first back-suction purging operation is a back-suction purging operation performed according to a preset time, and the duration of the back-suction purging operation in the second back-suction purging operation is less than the duration of the back-suction purging operation in the first back-suction purging operation; determining a first recorded duration, and determining whether to perform a one-key remote back-suction operation based on the first recorded duration and the execution result of the back-suction purging operation, wherein the first recorded duration is the duration from when the diesel vehicle is turned off to when the main power is cut off, and the one-key remote back-suction operation represents controlling the urea injection system to perform a purging process when the diesel vehicle is started again, and the execution result of the back-suction purging operation is the execution result of the first back-suction purging operation or the second back-suction purging operation.

[0118] This application also provides a diesel vehicle system, including: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include methods for performing any of the above-described methods. By performing a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and current ambient pressure, the purpose of performing back-suction evacuation operations for a reasonable duration according to actual operating conditions is achieved, preventing high-temperature exhaust gas in the exhaust pipe from corroding the nozzles and pipes due to back-suction evacuation. Finally, based on the length of the first recorded duration and the execution result of the back-suction evacuation operation, it is determined whether to perform a one-button remote back-suction operation, thereby further ensuring that the exhaust pipe of the urea injection system will not freeze or cause pipe bursting, thus solving the problem that even if sufficient time is allowed before disconnecting the main power in existing diesel vehicles, prolonged back-suction evacuation will still cause high-temperature exhaust gas in the exhaust pipe to corrode the nozzles and pipes.

[0119] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0120] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0121] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0122] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0123] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

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

[0125] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. 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 using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0127] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0128] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0129] 1) The control method for the urea injection system of the diesel vehicle of this application, by performing a first back-suction evacuation operation or a second back-suction evacuation operation based at least on the current ambient temperature and current ambient pressure, achieves the purpose of performing 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 nozzles and pipes due to back-suction evacuation. Finally, based on the length of the first recorded duration and the execution result of the back-suction evacuation operation, it is determined whether to perform a one-button remote back-suction operation, thereby further ensuring that the exhaust pipe of the urea injection system will not freeze or cause the pipes to burst. This solves the problem that even if sufficient time is allowed before disconnecting the main power in existing diesel vehicles, there will still be a problem of long-term back-suction evacuation leading to high-temperature exhaust gas in the exhaust pipe corroding the nozzles and pipes.

[0130] 2) The control device for the urea injection system of the diesel vehicle of this application performs a first back-suction purging operation or a second back-suction purging operation based on at least the current ambient temperature and current ambient pressure. This achieves the purpose of performing back-suction purging operation for a reasonable duration according to the actual working conditions, preventing the high-temperature exhaust gas in the exhaust pipe from corroding the nozzles and pipes due to back-suction purging. Finally, based on the length of the first recorded duration and the execution result of the back-suction purging operation, it is determined whether to perform a one-button remote back-suction operation. This further ensures that the exhaust pipe of the urea injection system will not freeze or cause the pipes to burst. This solves the problem that even if sufficient time is allowed before disconnecting the main power in existing diesel vehicles, the high-temperature exhaust gas in the exhaust pipe will corrode the nozzles and pipes due to prolonged back-suction purging.

[0131] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method of a urea injection system of a diesel vehicle, characterized by, The method comprises: obtaining an ambient temperature and an ambient pressure of an environment in which a diesel vehicle is located, to obtain a current ambient temperature and a current ambient pressure; performing a first back-suction emptying operation or a second back-suction emptying operation according to at least the current ambient temperature and the current ambient pressure, the first back-suction emptying operation being a back-suction emptying operation performed for a preset time, and a time length of the back-suction emptying operation in the second back-suction emptying operation being shorter than a time length of the back-suction emptying operation in the first back-suction emptying operation; determining a first recording time length, and determining whether to perform a one-key remote back-suction operation according to the first recording time length and a back-suction emptying operation execution result, the first recording time length being a time length from when the diesel vehicle is turned off to when a main power supply is turned off, the one-key remote back-suction operation representing that, in a case where the diesel vehicle is started next time, the urea injection system is controlled to perform emptying processing, and the back-suction emptying operation execution result being an execution result of performing the first back-suction emptying operation or the second back-suction emptying operation; the performing the first back-suction emptying operation or the second back-suction emptying operation according to at least the current ambient temperature and the current ambient pressure comprises: in a case where the current ambient temperature is greater than or equal to a temperature threshold value and the current ambient pressure is greater than or equal to a pressure threshold value, performing the second back-suction emptying operation; and in a case where the current ambient temperature is less than the temperature threshold value and / or the current ambient pressure is less than the pressure threshold value, performing the first back-suction emptying operation; the determining whether to perform the one-key remote back-suction operation according to the first recording time length and the back-suction emptying operation execution result comprises: determining a minimum time limit value corresponding to the back-suction emptying operation execution result; in a case where the first recording time length is less than the minimum time limit value, determining that the one-key remote back-suction operation is performed; in a case where the first recording time length is greater than or equal to the minimum time limit value and the back-suction emptying operation execution result is an execution result of performing the first back-suction emptying operation, determining that the one-key remote back-suction operation is not needed to be performed; and in a case where the first recording time length is greater than or equal to the minimum time limit value and the back-suction emptying operation execution result is an execution result of performing the second back-suction emptying operation, determining that the one-key remote back-suction operation is not needed to be performed.

2. The method of claim 1, wherein, the performing the first back-suction emptying operation or the second back-suction emptying operation according to at least the current ambient temperature and the current ambient pressure comprises: in a case where the current ambient temperature is greater than or equal to a temperature threshold value, the current ambient pressure is greater than or equal to a pressure threshold value, and it is determined that no urea heating and thawing request is received during a current driving cycle, performing the second back-suction emptying operation; in a case where a first preset condition is met, performing the first back-suction emptying operation, the first preset condition comprising at least one of the following: the current ambient temperature being less than the temperature threshold value, the current ambient pressure being less than the pressure threshold value, and it being determined that the urea heating and thawing request is received during the current driving cycle.

3. The method of claim 1, wherein, performing a first reverse pumping emptying operation or a second reverse pumping emptying operation according to at least the current ambient temperature and the current ambient pressure, comprising: performing the second reverse pumping emptying operation when the latitude information of the diesel vehicle is less than a latitude threshold, the current ambient temperature is greater than or equal to a temperature threshold, the current ambient pressure is greater than or equal to a pressure threshold, and it is determined that no urea heating defrosting request is received during a current driving cycle; performing the first reverse pumping emptying operation when a second preset condition is met, the second preset condition comprising 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 defrosting request is received during the current driving cycle, and the latitude information of the diesel vehicle is greater than or equal to the latitude threshold.

4. The method of claim 1, wherein, Before determining the first record duration, the method further comprises: when the execution result of the reverse pumping emptying operation is the execution result of performing the second reverse pumping emptying operation, determining a second record duration, the second record duration being a duration from the engine-off to the current time of the diesel vehicle; when the second record duration is greater than or equal to a first time threshold, generating a first prompt information to prompt that the parking duration is overdue and to suggest performing the one-key remote reverse pumping operation; when the second record duration is less than the first time threshold, updating the second record duration until the second record duration is greater than or equal to the first time threshold.

5. The method of claim 1, wherein, Before determining the first record duration, the method further comprises: when the execution result of the reverse pumping emptying operation is the execution result of performing the first reverse pumping emptying operation, determining a second record duration, the second record duration being a duration from the engine-off to the current time of the diesel vehicle; when the second record duration is greater than or equal to a second time threshold, generating a second prompt information to prompt that the total power-off time is not up to standard and to suggest performing the one-key remote reverse pumping operation; when the second record duration is less than the second time threshold, updating the second record duration until the second record duration is greater than or equal to the second time threshold.

6. A control device of a urea injection system of a diesel vehicle, characterized by comprising: an acquisition unit configured to acquire an ambient temperature and an ambient pressure of an environment where a diesel vehicle is located, to obtain a current ambient temperature and a current ambient pressure; a first processing unit configured to perform a first reverse pumping emptying operation or a second reverse pumping emptying operation according to at least the current ambient temperature and the current ambient pressure, the first reverse pumping emptying operation being a reverse pumping emptying operation performed according to a preset time, and a duration of the reverse pumping emptying operation in the second reverse pumping emptying operation being less than a duration of the reverse pumping emptying operation in the first reverse pumping emptying operation; The second processing unit is configured to determine a first recording duration, and determine whether to perform a one-key remote reverse pumping operation according to the first recording duration and a result of the reverse pumping and emptying operation, the first recording duration being a duration from an engine-off to a total power-off of the diesel vehicle, the one-key remote reverse pumping operation representing a control of the urea injection system to perform a cleaning process in a next start of the diesel vehicle, and the result of the reverse pumping and emptying operation being a result of performing the first reverse pumping and emptying operation or the second reverse pumping and emptying operation. The first processing unit includes a first processing module and a second processing module, the first processing module being configured to perform the second reverse pumping and emptying 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 reverse pumping and emptying operation when the current ambient temperature is less than the temperature threshold and / or the current ambient pressure is less than the pressure threshold. The second processing unit includes a first determining module, a second determining module, a third determining module and a fourth determining module, the first determining module being configured to determine a minimum time limit corresponding to the result of the reverse pumping and emptying operation. The second determining module is configured to determine to perform the one-key remote reverse pumping operation when the first recording duration is less than the minimum time limit. The third determining module is configured to determine not to perform the one-key remote reverse pumping operation when the first recording duration is greater than or equal to the minimum time limit and the result of the reverse pumping and emptying operation is a result of performing the first reverse pumping and emptying operation. The fourth determining module is configured to determine not to perform the one-key remote reverse pumping operation when the first recording duration is greater than or equal to the minimum time limit and the result of the reverse pumping and emptying operation is a result of performing the second reverse pumping and emptying operation.

7. A computer readable storage medium characterized by The computer-readable storage medium includes a stored program, wherein the program, when executed, controls a device in which the computer-readable storage medium is located to perform the method of any one of claims 1-5.

8. A diesel vehicle system characterized by, The one or more processors, the memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing the method of any one of claims 1-5. ​

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