Urea delivery line heating method, device, controller and vehicle

Abstract

The application belongs to the technical field of vehicles and provides a urea delivery pipeline heating method, device, controller and vehicle. The urea delivery pipeline of the vehicle is divided into at least two sections, and each section of the urea delivery pipeline is provided with an independent heating device. The method comprises the following steps: obtaining the operating parameters and the ambient temperature of the vehicle; determining whether the heating devices of each section of the urea delivery pipeline need to be started according to the operating parameters and the ambient temperature and determining the heating power of the heating devices that need to be started; and starting the operation of the heating devices that need to be started according to the heating power. The application can more reasonably heat the urea delivery pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and in particular relates to a urea delivery pipeline heating method, device, controller and vehicle. Background Art

[0002] With the continuous development of society, the requirements for vehicle exhaust emissions are becoming increasingly higher. To meet these requirements, vehicles are generally equipped with a urea system to neutralize nitrogen oxides in the exhaust gas.

[0003] The urea system delivers urea through urea delivery pipelines. Since the freezing point of urea solution is -11°C, to ensure a consistent supply of urea solution, these pipelines are equipped with heating structures to prevent urea from freezing. In related art, urea delivery pipelines often use heating wires for uniform heating. However, this uniform heating method can easily lead to underheating or overheating of some sections of the pipeline. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a urea delivery pipeline heating method, device, controller, and vehicle to more reasonably heat the urea delivery pipeline.

[0005] A first aspect of an embodiment of the present invention provides a urea delivery pipeline heating method, wherein a urea delivery pipeline of a vehicle is divided into at least two sections, and each section of the urea delivery pipeline is provided with an independent heating device;

[0006] The method includes:

[0007] Obtain vehicle operating parameters and ambient temperature;

[0008] According to the operating parameters and ambient temperature, determine whether the heating equipment of each section of the urea delivery pipeline needs to be turned on, and determine the heating power of the heating equipment that needs to be turned on;

[0009] According to the heating power, the heating equipment that needs to be turned on is controlled to start operation.

[0010] In conjunction with the first aspect, in a possible implementation of the first aspect, the at least two sections include a nozzle section, and the operating parameter includes exhaust gas temperature;

[0011] Based on the operating parameters and ambient temperature, determine whether the heating equipment of each section of the urea delivery pipeline needs to be turned on, including:

[0012] If the ambient temperature is lower than a preset first temperature threshold, and the exhaust temperature is lower than a preset exhaust temperature threshold, it is determined that the heating device of the nozzle segment needs to be turned on;

[0013] Otherwise, it is determined that the heating device of the nozzle segment does not need to be turned on.

[0014] In combination with the first aspect, in a possible implementation of the first aspect, the at least two sections further include a pipe body section and a pump end interface section;

[0015] Based on the operating parameters and ambient temperature, determine whether the heating equipment of each section of the urea delivery pipeline needs to be turned on, including:

[0016] If the ambient temperature is lower than a preset second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section need to be turned on;

[0017] If the ambient temperature is greater than or equal to the second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section do not need to be turned on;

[0018] The second temperature threshold is greater than the first temperature threshold.

[0019] In conjunction with the first aspect, in a possible implementation of the first aspect, the operating parameter further includes vehicle speed, the heating devices of the pipe body section and the pump end interface section are each preset with a corresponding first power value and a second power value, and for the same heating device, the first power value is greater than the second power value;

[0020] According to the operating parameters and ambient temperature, determine the heating power of the heating equipment that needs to be turned on, including:

[0021] If the ambient temperature is lower than the first temperature threshold, the heating powers of the heating devices of the pipe body section and the pump end interface section are determined to be their respective corresponding first power values;

[0022] If the ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined from the corresponding first power value and second power value based on the ambient temperature and vehicle speed.

[0023] In conjunction with the first aspect, in a possible implementation of the first aspect, determining the heating power of the heating devices of the pipe body section and the pump end interface section from the respective corresponding first power values ​​and second power values ​​according to the ambient temperature and the vehicle speed includes:

[0024] If the ambient temperature is less than a preset third temperature threshold and the vehicle speed is greater than or equal to the preset vehicle speed threshold, the heating power of the heating devices of the pipe body section and the pump end interface section is determined to be the first power value corresponding to each other; wherein the third temperature threshold is greater than the first temperature threshold and less than the second temperature threshold;

[0025] If the ambient temperature is greater than or equal to the third temperature threshold, or the ambient temperature is less than the third temperature threshold and the vehicle speed is less than the vehicle speed threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined to be the respective corresponding second power values.

[0026] In conjunction with the first aspect, in a possible implementation of the first aspect, determining the heating power of the heating device to be turned on according to the operating parameters and the ambient temperature includes:

[0027] If the heating device of the nozzle section needs to be turned on, the heating power of the heating device of the nozzle section is determined according to the exhaust temperature and a preset exhaust temperature and power relationship curve.

[0028] In combination with the first aspect, in a possible implementation of the first aspect, at the same time, the heating power of the heating device of the nozzle segment is less than the heating power of the heating device of the pipe segment, and the heating power of the heating device of the pipe segment is less than the heating power of the heating device of the pump end interface segment.

[0029] A second aspect of an embodiment of the present invention provides a urea delivery pipeline heating device, wherein the urea delivery pipeline of a vehicle is divided into at least two sections, and each section of the urea delivery pipeline is provided with an independent heating device;

[0030] The device includes:

[0031] An acquisition module is used to obtain the vehicle's operating parameters and ambient temperature;

[0032] A processing module is used to determine whether the heating equipment of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature, and to determine the heating power of the heating equipment that needs to be turned on;

[0033] The control module is used to control the heating equipment that needs to be turned on to start operation according to the heating power.

[0034] A third aspect of an embodiment of the present invention provides a controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method in the first aspect or any one of the implementations of the first aspect are implemented.

[0035] A fourth aspect of an embodiment of the present invention provides a vehicle, comprising the controller according to the third aspect.

[0036] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0037] In the embodiment of the present invention, a urea delivery pipeline is divided into at least two sections, and each section of the urea delivery pipeline is provided with an independent heating device. That is, the traditional arrangement of series heating wires is changed to segmented independent heating, making the heating function more targeted and greatly reducing the accuracy requirements for the heating resistor wires. Furthermore, the power of the heating devices in each section of the urea delivery pipeline is precisely controlled according to the vehicle's operating parameters and ambient temperature, which can solve the problems of local overheating or unsuccessful thawing caused by excessive or insufficient power. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 1 is a structural diagram of a urea system for a vehicle provided in an embodiment of the present invention;

[0040] Figure 2 1 is a schematic structural diagram of a urea delivery pipeline provided by an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the overall heating line wiring of the urea delivery pipeline provided by an embodiment of the present invention;

[0042] Figure 4 Schematic diagram of the wiring of the heating wires of various parts of the urea delivery pipeline provided by an embodiment of the present invention; wherein, a is a schematic diagram of the wiring of the pipe body section; b is a schematic diagram of the wiring of the nozzle section; c is a schematic diagram of the wiring of the pump end interface section; d is a schematic diagram of the quick plug;

[0043] Figure 5 This is a schematic diagram of the process of the urea delivery pipeline heating method provided by the embodiment of the present invention. Figure 1 ;

[0044] Figure 6 This is a schematic diagram of the process of the urea delivery pipeline heating method provided by the embodiment of the present invention. Figure 2 ;

[0045] Figure 7 1 is a schematic structural diagram of a urea delivery pipeline heating device provided by an embodiment of the present invention;

[0046] Figure 8 It is a schematic structural diagram of a controller provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0048] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0049] See also Figure 1 As shown in the figure, the current urea system mainly consists of: urea injection control unit (Dosing Control Unit, DCU), electronic controller unit (Electronic Control Unit, ECU), execution and information acquisition module (urea pump integrating multiple sensors), storage structure (urea tank), delivery structure (delivery pipe), injection execution structure (nozzle).

[0050] The nozzle is typically located in the mixing chamber of the exhaust system, where the ambient temperature during vehicle operation is relatively high. Urea tanks are typically located in the center or rear of the vehicle chassis. The urea delivery line connects to the urea pump, which delivers the urea solution to the nozzle. Consequently, the urea delivery line experiences significant temperature differences depending on its location. The freezing point of urea solution is -11°C, and urea freezes during winter in colder regions. To ensure a consistent urea supply, both the urea pump and the urea delivery line feature heating mechanisms. The former heats the urea in the tank, while the latter prevents freezing of the liquid in the line.

[0051] Currently, mainstream urea delivery pipes mostly use heating wires, which are built into the pipe channel or wrapped around the outer wall to achieve the heating function. To effectively distribute the heating power, the two joints and the pipe body of the urea delivery pipe have different heating wire resistance values, resulting in different powers. However, in this case, each section of the heating wire harness is also connected in series. When the vehicle is running in a cold environment, the nozzle end temperature can exceed 100°C, while the urea pump end temperature may be below -30°C. The current delivery pipe material generally has a maximum temperature tolerance of 130°C. Because the pipeline heating wires are connected in series and have a low resistance value, there are fewer specifications available on the market while ensuring the accuracy of the heating wires. Improper matching can easily lead to overheating and ablation of the nozzle end when the heating power is too high during vehicle operation. Or, if the power design is too low, the low temperature at the urea pump end cannot thaw and the urea cannot be supplied.

[0052] In light of this, the present invention proposes a segmented heating urea delivery pipeline. The urea delivery pipeline is divided into at least two sections, each equipped with an independent heating device. This replaces the traditional serial heating arrangement with a segmented, independent heating system. Based on the ambient temperature and the vehicle's driving conditions, the heating section of the urea delivery pipeline is selectively activated, making the heating function more effective and targeted while also preventing insufficient heating or thawing.

[0053] Considering that the temperature of the urea solution in the urea tank cannot be too high, the urea tank needs to be placed away from the exhaust pipe. Therefore, the temperature at the urea pump end is less affected by the exhaust temperature. The urea delivery pipeline is arranged from the urea pump to the nozzle, and the intermediate pipeline is arranged with the vehicle. The ambient temperature will vary greatly, but the lowest temperature point is still near the urea pump port, and the highest temperature point is near the nozzle. Therefore, refer to Figure 2 As shown, this embodiment divides the urea delivery pipeline into three sections: the nozzle section, the pipe section, and the pump-end interface section. These sections are designed as independent heating devices, independent of each other. The pump-end interface section needs to be designed with the highest power because it also needs to defrost the urea pump connector. The pipeline section is second, and the heating line near the nozzle connector has the lowest power.

[0054] The heating device can adopt an external heating form, and the heating wire is wound around the outer wall of the tube.

[0055] Please also see Figure 3 and Figure 4 As shown, the inner layer of the urea delivery pipeline serves as a channel for the urea solution. A heating harness is wrapped around the outer wall of the inner layer, and a protective sheath is applied to the outer surface of the heating harness. To ensure effective heating, the heating wires at the pump-end interface and the pipe body are evenly arranged in a spiral pattern. The nozzle heating wire is spirally wound within the reserved groove of the quick-connect fitting and connected in a straight line through the pipe body to the quick-connect fitting. Due to its low resistance, this linear arrangement reduces the impact of heating on the pipe body. To reduce the number of wiring harness plug-ins, the three sections of heating wire converge at the pump-end quick-connect fitting, forming the positive and negative terminals of the three heating wire sections.

[0056] The controller DCU controls the opening and closing of the three-section heating wires in the urea delivery pipeline, and can control the power of each heating wire according to the actual vehicle operating conditions and ambient temperature.

[0057] Alternatively, as Figure 5 As shown, the urea delivery pipeline heating method includes:

[0058] Step S501: Acquire the vehicle's operating parameters and ambient temperature.

[0059] In this embodiment, the operating parameters include but are not limited to vehicle speed, exhaust temperature, etc. The exhaust temperature is detected by a temperature sensor in the vehicle exhaust pipe, and the ambient temperature is detected by an ambient temperature sensor.

[0060] Step S502: Based on the operating parameters and the ambient temperature, determine whether the heating devices of each section of the urea delivery pipeline need to be turned on, and determine the heating power of the heating devices that need to be turned on. Based on the heating power, control the heating devices that need to be turned on to start operation.

[0061] In this embodiment, the heating device activates under different conditions for different sections of the urea delivery pipeline. Under different operating parameters and ambient temperatures, the temperatures of each section of the urea delivery pipeline vary, and therefore the activation power of the heating device in each section also varies. Choosing the appropriate heating location on the urea delivery pipeline can make the heating function more targeted and avoid insufficient heating or thawing.

[0062] In some embodiments, for the nozzle segment, if the ambient temperature is less than a preset first temperature threshold and the exhaust temperature is less than a preset exhaust temperature threshold, it is determined that the heating device of the nozzle segment needs to be turned on;

[0063] Otherwise, it is determined that the heating device of the nozzle segment does not need to be turned on.

[0064] Here, since the nozzle segment is arranged in the mixing chamber of the exhaust system, it can be heated by the vehicle exhaust. When the vehicle is started, the temperature of the nozzle segment is also higher than other parts of the urea delivery pipeline. Therefore, the first temperature threshold is set lower. For example, the first temperature threshold can be -7°C.

[0065] When the ambient temperature is lower than -7°C, if the vehicle has just been started and the exhaust temperature is low, for example, lower than the exhaust temperature threshold of 80°C, the heating equipment needs to be turned on for heating.

[0066] As the exhaust temperature rises, when the exhaust temperature is greater than 80°C, the heating equipment can be turned off and the exhaust temperature can be used for heating to avoid nozzle overheating and ablation.

[0067] When the ambient temperature is higher than -7℃, the exhaust temperature can be used for heating to meet the demand.

[0068] In this embodiment, when the nozzle segment heater needs to be turned on, the heater can be set to operate at full power. Alternatively, the heating power of the nozzle segment heater can be determined based on the exhaust temperature and a preset exhaust temperature-power relationship curve to achieve more precise temperature control.

[0069] In some embodiments, for the pipe body section and the pump end interface section, if the ambient temperature is less than a preset second temperature threshold, it is determined that the heating device of the pipe body section and the pump end interface section needs to be turned on;

[0070] If the ambient temperature is greater than or equal to the second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section do not need to be turned on;

[0071] The second temperature threshold is greater than the first temperature threshold.

[0072] Here, because the pipe body and pump interface section are not heated by exhaust gas, the second temperature threshold, which serves as the activation condition for the heating device, must be higher than the first temperature threshold. For example, the first temperature threshold is 0°C. When the ambient temperature is above 0°C, it is determined that there is no risk of urea freezing, and the heating function of the urea delivery pipe is turned off.

[0073] Optionally, the heating devices of the pipe body section and the pump end interface section are both preset with respective corresponding first power values ​​and second power values, and for the same heating device, the first power value is greater than the second power value. In this embodiment, when determining the heating powers of the heating devices of the pipe body section and the pump end interface section based on the above-mentioned operating parameters and ambient temperature, if the ambient temperature is less than the first temperature threshold, the heating powers of the heating devices of the pipe body section and the pump end interface section are determined to be their respective corresponding first power values;

[0074] If the ambient temperature is greater than or equal to the first temperature threshold but less than or equal to the second temperature threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined from the corresponding first power values ​​and second power values ​​based on the ambient temperature and vehicle speed.

[0075] In this embodiment, when the ambient temperature is below -7°C, the ambient temperature is very low, and the heating equipment of the pipe section and the pump end interface section requires a large heating power. For example, the heating equipment of the pipe section and the pump end interface section can be set to operate at full power. When the ambient temperature is between -7°C and 0°C, the ambient temperature is increased and the risk of urea freezing is reduced. In this case, the heating equipment of the pipe section and the pump end interface section can be controlled to heat at half power. However, since the temperature of the pipe section and the pump end interface section is affected by the vehicle speed, whether to use the heating equipment at half power for heating depends on the vehicle speed.

[0076] As a possible implementation, determining the heating power of the heating devices of the pipe body section and the pump end interface section from the corresponding first power value and second power value according to the ambient temperature and the vehicle speed includes:

[0077] If the ambient temperature is less than a preset third temperature threshold and the vehicle speed is greater than or equal to the preset vehicle speed threshold, the heating power of the heating devices of the pipe body section and the pump end interface section is determined to be the first power value corresponding to each other; wherein the third temperature threshold is greater than the first temperature threshold and less than the second temperature threshold;

[0078] If the ambient temperature is greater than or equal to the third temperature threshold, or the ambient temperature is less than the third temperature threshold but the vehicle speed is less than the vehicle speed threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined to be the respective corresponding second power values.

[0079] Optionally, the third temperature threshold may be -3°C. When the ambient temperature is between -7°C and -3°C, the risk of urea freezing is reduced, and the vehicle speed is judged continuously. If the vehicle speed is higher than 60km / h, the pump end interface section and the pipe section at the bottom of the chassis lose heat faster due to the high wind speed, so the heating device should continue to operate at full power for heating. Conversely, if the vehicle speed is lower than 60km / h, the heating device should be kept at half power for heating. When the ambient temperature is between -3°C and 0°C, the risk of freezing is further reduced, and the risk of heat loss caused by vehicle speed is negligible, so the heating device only needs to maintain half power for heating. It is worth noting that the nozzle section is arranged on the exhaust mixing chamber, which is greatly affected by radiant heat, and the arrangement environment is relatively shielded, so the gas flow rate is relatively less affected by vehicle speed, so there is no need to consider the impact of vehicle speed.

[0080] It is understood that in the embodiments of the present invention, based on the characteristic that the heating temperature requirements of the nozzle section, the pipe section, and the pump-end interface section increase in sequence, the heating power of the pump-end interface section can be designed to be the highest, the pipe section the second highest, and the pump-end interface section the lowest. Thus, at the same time, the heating power of the nozzle section's heating device is lower than that of the pipe section's heating device, and the heating power of the pipe section's heating device is lower than that of the pump-end interface section's heating device.

[0081] For example:

[0082] When the ambient temperature is lower than -7°C, if the heating devices of the nozzle section, pipe section and pump end interface section are all running at full power, the power of the heating devices of the nozzle section, pipe section and pump end interface section will increase in sequence.

[0083] When the ambient temperature is between -7°C and -3°C, the heating equipment of the pipe body section and the pump end interface section operates at full power or half power, and the power of the heating equipment of the pipe body section and the pump end interface section increases in sequence.

[0084] It can be seen that the present embodiment divides the urea delivery pipeline into at least two sections, and each section of the urea delivery pipeline is provided with an independent heating device, that is, the traditional arrangement of series heating wires is changed to segmented independent heating, so that the heating function is more targeted and the accuracy requirement for the heating resistance wire is greatly reduced; further, the power of the heating equipment of each section of the urea delivery pipeline is precisely controlled according to the vehicle's operating parameters and ambient temperature, which can solve the problem of local overheating or unsuccessful thawing caused by excessive or insufficient power.

[0085] In combination with the above, in one embodiment, the overall implementation process of the urea delivery pipeline heating method can also be as follows: Figure 6 Shown, including:

[0086] (1) When the engine is started, the ambient temperature is detected. If it is less than -7°C and the exhaust temperature is less than 80°C, the heating equipment of the nozzle section, pipe section and pump end interface section is turned on and heated at full power;

[0087] (2) As the engine runs and the exhaust temperature is ≥80°C, the nozzle section heating equipment is controlled to be turned off, while the heating equipment of the pipe section and the pump end interface section maintains full power heating;

[0088] (3) When the ambient temperature is detected to be -7℃ < ≤ -3℃, the vehicle speed is determined; if the vehicle speed is ≥ 60km / h, the heating equipment of the pipe body section and the pump end interface section is controlled to maintain full power heating; if the vehicle speed is < 60km / h, the heating equipment of the pipe body section and the pump end interface section is controlled to heat at half power;

[0089] (4) When the ambient temperature is detected to be -3℃<≤0℃, the heating equipment of the pipe body section and the pump end interface section is controlled to heat at half power;

[0090] (5) When the ambient temperature is detected to be >0℃, all heating devices are turned off.

[0091] The present invention changes the traditional urea delivery pipeline heating wire from a series type to a three-section type with independent control, which is not affected by each other, greatly reducing the accuracy requirements for the heating resistance wire. At the same time, it can compensate for local overheating or unsuccessful thawing caused by excessive or insufficient power. By controlling the power size of each section of the wire harness under different conditions, unnecessary energy loss is reduced.

[0092] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0093] Figure 7 This is a schematic diagram of the structure of a urea delivery pipeline heating device provided by an embodiment of the present invention. Figure 7 As shown, the device 70 includes:

[0094] The acquisition module 71 is used to acquire the operating parameters and ambient temperature of the vehicle.

[0095] The processing module 72 is used to determine whether the heating equipment of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature, and to determine the heating power of the heating equipment that needs to be turned on.

[0096] The control module 73 is used to control the heating equipment that needs to be turned on to start operation according to the heating power.

[0097] As a possible implementation, the at least two sections include a nozzle section, and the operating parameters include exhaust gas temperature. The processing module 72 is used to:

[0098] If the ambient temperature is lower than a preset first temperature threshold, and the exhaust temperature is lower than a preset exhaust temperature threshold, it is determined that the heating device of the nozzle segment needs to be turned on;

[0099] Otherwise, it is determined that the heating device of the nozzle segment does not need to be turned on.

[0100] As a possible implementation manner, the at least two sections further include a pipe body section and a pump end interface section.

[0101] The processing module 72 is used to:

[0102] If the ambient temperature is lower than a preset second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section need to be turned on;

[0103] If the ambient temperature is greater than or equal to the second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section do not need to be turned on;

[0104] The second temperature threshold is greater than the first temperature threshold.

[0105] As a possible implementation method, the operating parameters also include vehicle speed, and the heating equipment of the pipe section and the pump end interface section are preset with their respective corresponding first power values ​​and second power values, and for the same heating equipment, the first power value is greater than the second power value.

[0106] The processing module 72 is used to:

[0107] If the ambient temperature is lower than the first temperature threshold, the heating powers of the heating devices of the pipe body section and the pump end interface section are determined to be their respective corresponding first power values;

[0108] If the ambient temperature is greater than or equal to the first temperature threshold but less than or equal to the second temperature threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined from the corresponding first power values ​​and second power values ​​based on the ambient temperature and vehicle speed.

[0109] As a possible implementation, the processing module 72 is specifically configured to:

[0110] If the ambient temperature is less than a preset third temperature threshold and the vehicle speed is greater than or equal to the preset vehicle speed threshold, the heating power of the heating devices of the pipe body section and the pump end interface section is determined to be the first power value corresponding to each other; wherein the third temperature threshold is greater than the first temperature threshold and less than the second temperature threshold;

[0111] If the ambient temperature is greater than or equal to the third temperature threshold, or the ambient temperature is less than the third temperature threshold but the vehicle speed is less than the vehicle speed threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined to be the respective corresponding second power values.

[0112] As a possible implementation, the processing module 72 is configured to:

[0113] If the heating device of the nozzle section needs to be turned on, the heating power of the heating device of the nozzle section is determined according to the exhaust temperature and a preset exhaust temperature-power relationship curve.

[0114] As a possible implementation method, at the same time, the heating power of the nozzle segment heating device is smaller than that of the pipe segment heating device, and the heating power of the pipe segment heating device is smaller than that of the pump end interface segment heating device.

[0115] Figure 8 FIG. 8 is a schematic diagram of a controller 80 provided in one embodiment of the present invention. Figure 8 As shown, the controller 80 of this embodiment includes: a processor 81, a memory 82, and a computer program 83 stored in the memory 82 and executable on the processor 81, such as a urea delivery pipeline heating program. When the processor 81 executes the computer program 83, the steps in the above-mentioned embodiments of the urea delivery pipeline heating method are implemented, such as Figure 5 Alternatively, when the processor 81 executes the computer program 83, the functions of each module in the above-mentioned device embodiments are realized, for example Figure 7 The functions of modules 71 to 73 are shown.

[0116] Exemplarily, the computer program 83 may be divided into one or more modules / units, one or more of which are stored in the memory 82 and executed by the processor 81 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program 83 in the controller 80.

[0117] The controller 80 may include, but is not limited to, a processor 81 and a memory 82. Those skilled in the art will appreciate that Figure 8 This is only an example of the controller 80 and does not constitute a limitation of the controller 80. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the controller 80 may also include input and output devices, network access devices, buses, etc.

[0118] The processor 81 may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0119] The memory 82 can be an internal storage unit of the controller 80, such as the hard disk or memory of the controller 80. The memory 82 can also be an external storage device of the controller 80, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. equipped on the controller 80. Furthermore, the memory 82 can include both the internal storage unit of the controller 80 and an external storage device. The memory 82 is used to store computer programs and other programs and data required by the controller 80. The memory 82 can also be used to temporarily store data that has been output or is about to be output.

[0120] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0121] An embodiment of the present invention further provides a vehicle, which includes the controller as described above.

[0122] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0123] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0124] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / controller and method can be implemented in other ways. For example, the apparatus / controller embodiments described above are merely schematic, for example, the division of modules or units is merely a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0125] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0126] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0127] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. Computer-readable media may include: any entity or device that can carry computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0128] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A urea delivery pipeline heating method, characterized in that: The vehicle's urea delivery pipeline is divided into at least two sections, and each section of the urea delivery pipeline is equipped with an independent heating device; The method comprises: Obtaining operating parameters and ambient temperature of the vehicle; According to the operating parameters and the ambient temperature, determining whether the heating equipment of each section of the urea delivery pipeline needs to be turned on, and determining the heating power of the heating equipment that needs to be turned on; According to the heating power, the heating equipment that needs to be turned on is controlled to start operation; The at least two sections include a nozzle section, and the operating parameters include exhaust gas temperature; The step of determining whether the heating device of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature includes: If the ambient temperature is lower than a preset first temperature threshold, and the exhaust temperature is lower than a preset exhaust temperature threshold, determining that the heating device of the nozzle segment needs to be turned on; Otherwise, it is determined that the heating device of the nozzle segment does not need to be turned on; The at least two sections also include a pipe body section and a pump end interface section; The step of determining whether the heating device of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature further includes: If the ambient temperature is lower than a preset second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section need to be turned on; If the ambient temperature is greater than or equal to the second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section do not need to be turned on; Wherein, the second temperature threshold is greater than the first temperature threshold; The operating parameters also include vehicle speed, and the heating devices of the pipe body section and the pump end interface section are preset with respective corresponding first power values ​​and second power values, and for the same heating device, the first power value is greater than the second power value; Determining the heating power of the heating device to be turned on according to the operating parameters and the ambient temperature includes: If the ambient temperature is lower than the first temperature threshold, determining that the heating powers of the heating devices of the pipe body section and the pump end interface section are both the first power values ​​corresponding to each other; If the ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined from the corresponding first power value and second power value based on the ambient temperature and the vehicle speed.

2. The urea delivery pipeline heating method according to claim 1, characterized in that: The step of determining the heating powers of the heating devices of the pipe body section and the pump end interface section from the first power value and the second power value respectively corresponding to the ambient temperature and the vehicle speed includes: If the ambient temperature is lower than a preset third temperature threshold and the vehicle speed is greater than or equal to a preset vehicle speed threshold, the heating powers of the heating devices of the pipe body section and the pump end interface section are determined to be the first power values ​​corresponding to each other; wherein the third temperature threshold is greater than the first temperature threshold and less than the second temperature threshold; If the ambient temperature is greater than or equal to the third temperature threshold, or the ambient temperature is less than the third temperature threshold and the vehicle speed is less than the vehicle speed threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined to be the second power value corresponding to each.

3. The urea delivery pipeline heating method according to claim 1, characterized in that: Determining the heating power of the heating device to be turned on according to the operating parameters and the ambient temperature includes: If the heating device of the nozzle section needs to be turned on, the heating power of the heating device of the nozzle section is determined according to the exhaust temperature and a preset exhaust temperature and power relationship curve.

4. The urea delivery pipeline heating method according to any one of claims 1 to 3, characterized in that: At the same time, the heating power of the heating device of the nozzle section is smaller than the heating power of the heating device of the pipe section, and the heating power of the heating device of the pipe section is smaller than the heating power of the heating device of the pump end interface section.

5. A urea delivery pipeline heating device, characterized in that: The vehicle's urea delivery pipeline is divided into at least two sections, and each section of the urea delivery pipeline is equipped with an independent heating device; The device comprises: An acquisition module, configured to acquire operating parameters and ambient temperature of the vehicle; a processing module, configured to determine whether the heating equipment of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature, and to determine the heating power of the heating equipment that needs to be turned on; A control module, configured to control the heating equipment that needs to be turned on to start operation according to the heating power; The at least two sections include a nozzle section, and the operating parameters include exhaust gas temperature; The step of determining whether the heating device of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature includes: If the ambient temperature is lower than a preset first temperature threshold, and the exhaust temperature is lower than a preset exhaust temperature threshold, determining that the heating device of the nozzle segment needs to be turned on; Otherwise, it is determined that the heating device of the nozzle segment does not need to be turned on; The at least two sections also include a pipe body section and a pump end interface section; The step of determining whether the heating device of each section of the urea delivery pipeline needs to be turned on according to the operating parameters and the ambient temperature further includes: If the ambient temperature is lower than a preset second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section need to be turned on; If the ambient temperature is greater than or equal to the second temperature threshold, it is determined that the heating devices of the pipe body section and the pump end interface section do not need to be turned on; Wherein, the second temperature threshold is greater than the first temperature threshold; The operating parameters also include vehicle speed, and the heating devices of the pipe body section and the pump end interface section are preset with respective corresponding first power values ​​and second power values, and for the same heating device, the first power value is greater than the second power value; Determining the heating power of the heating device to be turned on according to the operating parameters and the ambient temperature includes: If the ambient temperature is lower than the first temperature threshold, determining that the heating powers of the heating devices of the pipe body section and the pump end interface section are both the first power values ​​corresponding to each other; If the ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the heating power of the heating equipment of the pipe body section and the pump end interface section is determined from the corresponding first power value and second power value based on the ambient temperature and the vehicle speed.

6. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

7. A vehicle, characterized in that: Comprising the controller as claimed in claim 6 above.

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