Urea heating device and system, vehicle, control method and equipment

Abstract

The invention discloses a urea heating device and system, a vehicle, a control method and equipment. The urea heating device comprises a front-stage heater and a rear-stage heater, the front-stage heater comprises a heating cavity and a heat conduction pipe, the heat conduction pipe is arranged in the heating cavity, and the heating cavity and engine cooling liquid form a circulation branch so that urea flowing through the heat conduction pipe can be preheated through the engine cooling liquid in the heating cavity; one end of the connecting pipe is communicated with an outlet of the heat conduction pipe of the preceding-stage heater; the rear-stage heater comprises a urea cavity and an electric heater, the urea cavity is communicated with the other end of the connecting pipe, the electric heater is used for selectively heating urea in the urea cavity, and an outlet of the urea cavity is connected with the urea nozzle so that the urea nozzle can eject urea meeting the temperature requirement. By the adoption of the application, urea is preheated through the engine cooling liquid and then is selectively heated through the electric heater, and the energy consumption of the engine and the risk of urea crystallization can be reduced while the requirement for the urea injection temperature can be met.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a urea heating device, system, vehicle, control method, and equipment. Background Technology

[0002] During urea injection, insufficient initial injection temperature can easily lead to urea crystallization. Current methods commonly employ electric heaters or mixers to preheat the urea to ensure it reaches the initial injection temperature and meets emission requirements. However, this method, relying on electric heating, often results in increased vehicle energy consumption and affects system stability. Summary of the Invention

[0003] Therefore, it is necessary to provide a urea heating device, system, vehicle, control method, and equipment to address the above-mentioned technical problems. This device preheats the urea with engine coolant and then selectively heats it with an electric heater, which can reduce engine energy consumption and the risk of urea crystallization while meeting the urea injection temperature requirements.

[0004] In a first aspect, a heating device for urea is provided, comprising: A preheater, comprising a heating chamber and a heat pipe, wherein the heat pipe is disposed in the heating chamber, and the heating chamber forms a circulation branch with the engine coolant to preheat the urea flowing through the heat pipe by means of the engine coolant in the heating chamber; A connecting pipe, one end of which is connected to the outlet of the heat-conducting pipe of the preheater; The post-stage heater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe. The electric heater is used to selectively heat the urea in the urea chamber. The outlet of the urea chamber is connected to a urea nozzle so that the urea nozzle can spray urea that meets the temperature requirements.

[0005] Furthermore, the inlet of the heat pipe is connected to the urea pump to receive the urea pumped out by the urea pump.

[0006] Furthermore, the heat pipe is arranged in a spiral shape in the heating cavity.

[0007] Furthermore, the electric heater is disposed inside the urea chamber.

[0008] Furthermore, among which: When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is activated to electrically heat the urea in the urea chamber. When the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is turned off to stop electrically heating the urea in the urea chamber, wherein the second threshold is greater than the first threshold.

[0009] Furthermore, it also includes a temperature sensor, which is disposed inside the urea chamber and is used to detect the temperature of the urea inside the urea chamber.

[0010] In a second aspect, an engine exhaust aftertreatment system is provided, comprising: a urea heating device according to the first aspect described above.

[0011] Thirdly, a vehicle is provided, comprising: the engine exhaust aftertreatment system according to the second aspect described above.

[0012] Fourthly, a method for controlling a urea heating device is provided, wherein the urea heating device is the urea heating device according to the first aspect described above, and the method for controlling the urea heating device includes: The temperature of urea inside the urea chamber of the heating device for obtaining urea; Based on the temperature of the urea in the urea chamber, the electric heater of the urea heating device is controlled to selectively heat the urea in the urea chamber. When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is activated to heat the urea in the urea chamber. When the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is deactivated to stop heating the urea in the urea chamber. The second threshold is greater than the first threshold.

[0013] Fifthly, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the steps of a control method for a urea heating device according to the fourth aspect and any possible implementation thereof.

[0014] The embodiment of this application comprises a preheater, a connecting pipe, and a postheater. The preheater includes a heating chamber and a heat-conducting pipe, with the heat-conducting pipe disposed within the heating chamber. The heating chamber forms a circulation path with the engine coolant, allowing the engine coolant within the heating chamber to preheat the urea flowing through the heat-conducting pipe. One end of the connecting pipe is connected to the outlet of the heat-conducting pipe of the preheater. The postheater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe, and the electric heater selectively heats the urea within the urea chamber. The outlet of the urea chamber is connected to a urea nozzle, allowing the nozzle to spray urea at the required temperature. Thus, by preheating the urea with engine coolant and then selectively heating it with the electric heater, the required urea injection temperature can be met while reducing engine energy consumption and minimizing the risk of urea crystallization. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A schematic diagram of a urea heating device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the system configuration provided in the embodiments of this application; Figure 3 This is a schematic diagram of the internal structure provided for an embodiment of this application; Figure 4 A schematic diagram of the control logic provided in the embodiments of this application; Figure 5 A flowchart of a control method for a urea heating device provided in an embodiment of this application; Figure 6 This is a structural block diagram of a computer device provided in an embodiment of this application. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings.

[0017] It should be noted that, unless otherwise specified, the embodiments and features of the embodiments 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.

[0018] The following describes in detail, with reference to the accompanying drawings, a urea heating device, system, vehicle, control method, and equipment according to embodiments of this application.

[0019] Figure 1This is a schematic diagram of a urea heating device according to an embodiment of this application. Figure 1 As shown, and in combination Figure 2 The urea heating device according to an embodiment of this application includes: a preheater 110, a connecting pipe 120, and a postheater 130, wherein: A preheater 110 includes a heating chamber and a heat-conducting pipe. The heat-conducting pipe is disposed in the heating chamber, which forms a circulation path with the engine coolant to preheat the urea flowing through the heat-conducting pipe using the engine coolant within the heating chamber. The heat-conducting pipe is arranged in a spiral shape within the heating chamber, and its inlet is connected to a urea pump to receive urea pumped out by the urea pump.

[0020] A connecting pipe 120, one end of which is connected to the outlet of the heat-conducting pipe of the preheater 110.

[0021] A post-heater 130 includes a urea chamber and an electric heater. The electric heater is disposed within the urea chamber. The urea chamber is connected to the other end of the connecting pipe 120. The electric heater is used to selectively heat the urea within the urea chamber. The outlet of the urea chamber is connected to a urea nozzle so that the urea nozzle can spray urea at the required temperature.

[0022] It also includes a temperature sensor, which is disposed inside the urea chamber and is used to detect the temperature of the urea inside the urea chamber.

[0023] Figure 3 This is a schematic diagram of the internal structure of a urea heating device, as shown below. Figure 3 As shown, urea flows from the urea pump under pump pressure through a heat pipe into the preheater 110, where it exchanges heat with the engine coolant, which is the preheating process of the urea. When the engine is running normally, the engine coolant temperature is around 90℃, which can raise the urea temperature to above 80℃. However, when the engine is not fully warmed up, the engine coolant temperature is lower, and the urea cannot reach the target temperature after preheating. In this case, the urea undergoes secondary heating after passing through the connecting pipe 120 into the postheater 130.

[0024] Control methods for secondary heating, such as Figure 4 As shown, after the engine ignition switch is turned on, the urea heating device controller communicates with the engine electronic control unit to confirm and obtain signals such as engine speed, torque, exhaust flow, engine coolant temperature, urea tank temperature, and whether urea pressure has been built up from the electronic control unit; then, it determines whether heating needs to be turned on based on the temperature signals fed back by the engine coolant temperature and urea temperature sensor.

[0025] When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is activated to electrically heat the urea in the urea chamber; when the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is turned off to stop electrically heating the urea in the urea chamber, wherein the second threshold is greater than the first threshold.

[0026] In one specific example, when the temperature of the urea in the urea chamber is below 75°C, the electric heater is activated for electric heating. When the battery voltage is detected to be within the normal range, the electric heater is controlled to heat at 100% power. When the temperature of the urea in the urea chamber reaches 95°C, the electric heater stops heating. In other examples, the first and second thresholds can be set according to actual needs.

[0027] The urea heating device according to an embodiment of this application comprises a preheater, a connecting pipe, and a postheater. The preheater includes a heating chamber and a heat-conducting pipe, with the heat-conducting pipe disposed within the heating chamber. The heating chamber forms a circulation path with the engine coolant, allowing the engine coolant within the heating chamber to preheat the urea flowing through the heat-conducting pipe. One end of the connecting pipe is connected to the outlet of the heat-conducting pipe of the preheater. The postheater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe, and the electric heater selectively heats the urea within the urea chamber. The outlet of the urea chamber is connected to a urea nozzle, allowing the nozzle to spray urea at the required temperature. Thus, by preheating the urea with engine coolant and then selectively heating it with the electric heater, the required urea injection temperature can be met while reducing engine energy consumption and minimizing the risk of urea crystallization.

[0028] In one embodiment, an engine exhaust aftertreatment system is provided, comprising: a urea heating device according to any of the above embodiments. The engine exhaust aftertreatment system according to this application embodiment consists of a pre-heater, a connecting pipe, and a post-heater. The pre-heater includes a heating chamber and a heat-conducting pipe, the heat-conducting pipe being disposed in the heating chamber. The heating chamber forms a circulation branch with the engine coolant to preheat the urea flowing through the heat-conducting pipe via the engine coolant in the heating chamber. One end of the connecting pipe is connected to the outlet of the heat-conducting pipe of the pre-heater. The post-heater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe. The electric heater selectively heats the urea in the urea chamber. The outlet of the urea chamber is connected to a urea nozzle so that the urea nozzle sprays urea at the required temperature. Thus, by preheating the urea with engine coolant and then selectively heating it with the electric heater, the urea injection temperature requirements can be met while reducing engine energy consumption and the risk of urea crystallization.

[0029] In one embodiment, a vehicle is provided, comprising: an engine exhaust aftertreatment system according to any of the above embodiments, the vehicle comprising a pre-heater, a connecting pipe, and a post-heater. The pre-heater includes a heating chamber and a heat-conducting pipe, the heat-conducting pipe being disposed in the heating chamber. The heating chamber forms a circulation branch with the engine coolant to preheat urea flowing through the heat-conducting pipe via the engine coolant in the heating chamber. One end of the connecting pipe is connected to the outlet of the heat-conducting pipe of the pre-heater. The post-heater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe. The electric heater is used to selectively heat the urea in the urea chamber. The outlet of the urea chamber is connected to a urea nozzle so that the urea nozzle can spray urea at the required temperature. Thus, by preheating the urea with engine coolant and then selectively heating it with the electric heater, the urea injection temperature requirements can be met while reducing engine energy consumption and the risk of urea crystallization.

[0030] Furthermore, other components and functions of the vehicle according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0031] Figure 5 This is a flowchart of a control method for a urea heating device according to an embodiment of this application. Figure 5 As shown, a control method for a urea heating device according to an embodiment of this application, wherein the urea heating device is a urea heating device according to any of the above embodiments, the control method includes the following steps: S501: The temperature of urea in the urea chamber of the urea heating device is obtained; S502: Based on the temperature of the urea in the urea chamber, the electric heater of the urea heating device is controlled to selectively heat the urea in the urea chamber. When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is controlled to start to heat the urea in the urea chamber. When the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is controlled to turn off to stop heating the urea in the urea chamber. The second threshold is greater than the first threshold.

[0032] The control method for the urea heating device according to an embodiment of this application comprises a preheater, a connecting pipe, and a postheater. The preheater includes a heating chamber and a heat-conducting pipe, with the heat-conducting pipe disposed in the heating chamber. The heating chamber forms a circulation branch with the engine coolant to preheat the urea flowing through the heat-conducting pipe using the engine coolant within the heating chamber. One end of the connecting pipe is connected to the outlet of the heat-conducting pipe of the preheater. The postheater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe, and the electric heater selectively heats the urea within the urea chamber. The outlet of the urea chamber is connected to a urea nozzle so that the nozzle sprays urea at the required temperature. Thus, by preheating the urea with engine coolant and then selectively heating it with the electric heater, the required urea injection temperature can be met while reducing engine energy consumption and minimizing the risk of urea crystallization.

[0033] Specific limitations regarding the control method for the urea heating device can be found in the above-described limitations of the urea heating device, and will not be repeated here. Each module of the control method for the urea heating device described above can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0034] In one embodiment, a computer device is provided. Figure 6 This is a structural block diagram of the computer device provided in the embodiments of this application, with reference to... Figure 6 The computer device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned control method embodiment for the urea heating device. For example, it executes: obtaining the temperature of the urea within the urea chamber of the urea heating device; Based on the temperature of the urea in the urea chamber, the electric heater of the urea heating device is controlled to selectively heat the urea in the urea chamber. When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is activated to heat the urea in the urea chamber. When the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is deactivated to stop heating the urea in the urea chamber. The second threshold is greater than the first threshold.

[0035] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heating device for urea, characterized in that, include: A preheater, comprising a heating chamber and a heat pipe, wherein the heat pipe is disposed in the heating chamber, and the heating chamber forms a circulation branch with the engine coolant to preheat the urea flowing through the heat pipe by means of the engine coolant in the heating chamber; A connecting pipe, one end of which is connected to the outlet of the heat-conducting pipe of the preheater; The post-stage heater includes a urea chamber and an electric heater. The urea chamber is connected to the other end of the connecting pipe. The electric heater is used to selectively heat the urea in the urea chamber. The outlet of the urea chamber is connected to a urea nozzle so that the urea nozzle can spray urea that meets the temperature requirements.

2. The urea heating device according to claim 1, characterized in that, The inlet of the heat pipe is connected to the urea pump to receive the urea pumped out by the urea pump.

3. The urea heating device according to claim 1, characterized in that, The heat pipes are arranged in a spiral shape in the heating chamber.

4. The urea heating device according to claim 1, characterized in that, The electric heater is located inside the urea chamber.

5. The urea heating device according to claim 1, characterized in that, in: When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is activated to electrically heat the urea in the urea chamber. When the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is turned off to stop electrically heating the urea in the urea chamber, wherein the second threshold is greater than the first threshold.

6. The urea heating device according to any one of claims 1-5, characterized in that, Also includes: A temperature sensor is disposed inside the urea chamber to detect the temperature of the urea inside the urea chamber.

7. An engine exhaust aftertreatment system, characterized in that, include: The urea heating device according to any one of claims 1-6.

8. A vehicle, characterized in that, include: The engine exhaust aftertreatment system according to claim 7.

9. A method for controlling a urea heating device, characterized in that, The urea heating device is the urea heating device according to any one of claims 1-5, and the control method of the urea heating device includes: The temperature of urea inside the urea chamber of the heating device for obtaining urea; Based on the temperature of the urea in the urea chamber, the electric heater of the urea heating device is controlled to selectively heat the urea in the urea chamber. When the temperature of the urea in the urea chamber is lower than a first threshold, the electric heater is activated to heat the urea in the urea chamber. When the temperature of the urea in the urea chamber reaches a second threshold, the electric heater is deactivated to stop heating the urea in the urea chamber. The second threshold is greater than the first threshold.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the control method for the urea heating device according to claim 9.

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