Urea system, control method and vehicle

Abstract

The application discloses a urea system, a control method and a vehicle, and relates to the technical field of urea systems, and in particular relates to a urea system, a control method and a vehicle.The urea system comprises a urea tank, a urea tank is used for containing urea; a filling pipe, one end of the filling pipe is communicated with the urea tank, and the other end is used for filling urea; and a detection assembly, the detection assembly is arranged on the filling pipe, so as to judge whether the liquid in the filling pipe is qualified urea. The detection assembly is arranged on the filling pipe, the detection assembly detects the liquid in the filling pipe in time, and the rapid response capability is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more specifically, to a urea system, a control method, and a vehicle. Background Technology

[0002] In related technologies, the urea filling port and fuel filling port on the vehicle surface are usually arranged together. In addition, diesel vehicle users often manually add diesel and urea themselves, which can easily lead to mixing. In order to detect the urea level, the detection device is usually installed inside the urea tank, which has a relatively slow response. Summary of the Invention

[0003] In view of this, the present invention aims to provide a urea system.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A urea system applied to a vehicle, the urea system comprising: a urea tank for containing urea; a filling pipe, one end of which is connected to the urea tank and the other end for filling the urea; and a detection component disposed on the filling pipe for determining whether the liquid in the filling pipe is qualified urea.

[0006] According to an embodiment of the urea system of the present invention, by placing the detection component on the filling pipe, the detection component can detect the liquid in the filling pipe in a timely manner, thereby improving the rapid response capability.

[0007] In addition, the urea system according to the above embodiments of the present invention may also have the following additional technical features:

[0008] According to some embodiments of the present invention, the detection component includes: a pipe fitting disposed in the filling pipe, the pipe fitting having a channel space communicating with the filling pipe; a heating element disposed in the pipe fitting, the heating element heating the liquid in the channel space; and a temperature sensing element disposed in the channel space to detect the temperature of the liquid and obtain a temperature change value.

[0009] According to some embodiments of the present invention, the pipe fitting has an inlet channel and an outlet channel, one end of the inlet channel is connected to the filling pipe and the other end is connected to the channel space, one end of the outlet channel is connected to the filling pipe and the other end is connected to the channel space, and the aperture of the outlet channel is smaller than the aperture of the inlet channel.

[0010] According to some embodiments of the present invention, the urea system further includes: a warning element electrically connected to the temperature sensor to issue a warning when the temperature change value is greater than a set value.

[0011] The notification device includes a speaker and / or a notification light, and emits a notification sound and / or a notification light when the temperature change value is greater than a set value.

[0012] According to some embodiments of the present invention, the urea system further includes: a vent pipe, one end of which is connected to the filling pipe and the other end of which is connected to the urea tank, and the urea tank is provided with a vent valve.

[0013] According to some embodiments of the present invention, the detection component is located at the end of the filling tube away from the urea tank.

[0014] Another object of the present invention is to provide a method for controlling a urea system.

[0015] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0016] A control method for a urea system, the urea system comprising: a urea tank and a filling pipe, the filling pipe being connected to the urea tank, a detection component being provided on the filling pipe, the detection component comprising: a pipe fitting, a heating element, and a temperature sensor, the pipe fitting having a channel space being connected to the filling pipe, the temperature sensor and the heating element being disposed on the pipe fitting; the control method comprising: controlling the heating element to heat liquid in the channel space, controlling the temperature sensor to acquire a first temperature of the liquid; at set intervals, controlling the temperature sensor to acquire a second temperature of the liquid, and obtaining a temperature change value between the first temperature and the second temperature.

[0017] According to the control method of the present invention, the liquid in the filling pipe can be quickly detected by detecting temperature change values, thereby avoiding the incorrect filling of diesel fuel.

[0018] According to some embodiments of the present invention, the urea system further includes a prompting element, and the control method further includes: if the temperature change value is greater than a set value, controlling the prompting element to issue a prompt.

[0019] According to some embodiments of the present invention, the volume of the channel space is 2 ml, the power of the heating element is 5 W, and the setting time is 10 s.

[0020] Another object of the present invention is to provide a vehicle.

[0021] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0022] A vehicle comprising the aforementioned urea system.

[0023] The vehicle according to an embodiment of the present invention, by utilizing the urea system described above, can quickly detect the liquid in the filling pipe, thereby improving rapid response capability. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a urea system according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 Enlarged view of a section at point I;

[0027] Figure 3 This is a flowchart illustrating the steps of a control method according to an embodiment of the present invention;

[0028] Figure 4 This is a detailed step diagram of the control method according to an embodiment of the present invention.

[0029] Figure label:

[0030] 100. Urea system;

[0031] 10. Filling pipe; 11. Quick-connect fitting for filling pipe; 12. Fixing bracket for filling pipe;

[0032] 20. Detection components; 21. Piping fittings; 211. Channel space; 212. Inlet channel; 213. Outlet channel; 22. Heating components; 23. Temperature sensing components;

[0033] 40. Vent tube; 41. Vent tube quick connector. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0035] The following will refer to Figures 1-4 The present invention will be described in detail with reference to the embodiments.

[0036] like Figure 1 As shown, according to an embodiment of the present invention, a urea system 100 is applied to a vehicle. The urea system 100 includes: a urea tank, a filling pipe 10, and a detection component 20.

[0037] The urea tank is used to hold urea.

[0038] One end of the filling pipe 10 is connected to the urea tank, and the other end is used for filling urea. It can be understood that the filling pipe 10 is a hollow pipe through which urea is added to the urea tank.

[0039] The detection component 20 is installed on the filling tube 10 to determine whether the liquid in the filling tube 10 is qualified urea.

[0040] It should be noted that the detection component 20 detects whether the liquid in the filling tube 10 is qualified urea. If the liquid in the filling tube 10 is not urea, or if the liquid in the filling tube 10 is unqualified urea, the detection component 20 can detect it.

[0041] In related technologies, the urea filling port and fuel filling port on the vehicle surface are usually arranged together. In addition, diesel vehicle users often manually add diesel and urea, which can easily lead to mixing. The detection device is usually installed inside the urea tank, which results in a relatively slow response. This application improves the response capability by installing the detection component 20 on the filling pipe 10, which allows for faster detection.

[0042] According to an embodiment of the present invention, the urea system 100, by installing the detection component 20 on the filling pipe 10, allows the detection component 20 to contact the liquid to be detected more quickly, thereby enabling faster detection of results and improving responsiveness.

[0043] like Figure 2 As shown, according to some embodiments of the present invention, the detection component 20 includes: a pipe component 21, a heating component 22, and a temperature sensing component 23.

[0044] Pipe fitting 21 is provided on filling pipe 10. Pipe fitting 21 has a channel space 211, which is connected to filling pipe 10. Liquid in filling pipe 10 flows into channel space 211.

[0045] Heating element 22 is disposed on pipe component 21, and heating element 22 heats the liquid in channel space 211. Heating element 22 heats the liquid in channel space 211, causing a temperature change.

[0046] Temperature sensor 23 is disposed in channel space 211 to detect the temperature of liquid and obtain temperature change value.

[0047] It is understandable that different substances have different specific heat capacities. For example, the specific heat capacity of standard urea aqueous solution is (3.9-4.5) J / g·K, and its density is about 1.05 g / ml. The specific heat capacity of diesel is about 2.1 J / g·K, and its density is about 0.85 g / ml. According to Q = cmΔt = pt and m = ρv (Q: heat; c: specific heat capacity coefficient; m: mass; Δt: temperature change value; ρ: density; v: volume), it can be concluded that under the same heat transfer and the same volume, the temperature change factor between the two is: Δt(diesel) / Δt(urea aqueous solution) = 2.3 to 2.6 times. By setting the temperature sensing element 23 to detect the temperature change value of the liquid, and utilizing the different specific heat capacities corresponding to different substances, it is possible to quickly detect whether the liquid is urea.

[0048] like Figure 2 As shown, according to some embodiments of the present invention, the pipe fitting 21 has an inlet channel 212 and an outlet channel 213. One end of the inlet channel 212 is connected to the filling pipe 10, and the other end is connected to the channel space 211. One end of the outlet channel 213 is connected to the filling pipe 10, and the other end is connected to the channel space 211. The aperture of the outlet channel 213 is smaller than the aperture of the inlet channel 212. By setting the inlet channel 212 and outlet channel 213 with unequal apertures, the liquid can remain in the channel space 211 for convenient heating, while allowing the liquid to flow back into the filling pipe 10. The structure is simple and durable.

[0049] According to some embodiments of the present invention, the orifice diameter of the discharge channel 213 is 1.5 mm, and the orifice diameter of the inlet channel 212 is 5 mm. By setting the orifice diameter of the inlet channel 212 to 5 mm and the orifice diameter of the discharge channel 213 to 1.5 mm, the liquid in the channel space 211 can remain sufficiently, the heating element 22 can fully heat the liquid in the channel space 211, and at the same time, the discharge channel 213 prevents liquid from remaining in the channel space 211, so that the temperature sensing element 23 can function effectively during each filling.

[0050] According to some embodiments of the present invention, the urea system 100 further includes a warning element electrically connected to the temperature sensor 23 to issue a warning when the temperature change exceeds a set value. The warning element serves to alert the customer.

[0051] Specifically, the alerting components include a speaker and an indicator light, which emit an alert sound and light when the temperature change exceeds a set value.

[0052] Specifically, the notification device includes a speaker that emits a notification sound when the temperature change exceeds a set value, making it convenient for the user to receive information.

[0053] Specifically, the notification features include: a notification light that emits a warning light when the temperature change exceeds a set value, making it easier for the user to receive information.

[0054] Specifically, the set value is 7°C. When the temperature change is greater than 7°C, the prompt will issue a warning.

[0055] More specifically, the heating element 22 has a power of 5W, the channel space 211 has a volume of 2ml, and the time requirement for the temperature change value is 10s, so that the temperature change values ​​are significantly different and misjudgment is avoided.

[0056] For example, the heating element 22 raises the temperature of diesel fuel by about 12°C in 10 seconds, and the heating element 22 raises the temperature of urea aqueous solution by about 4.6°C to 5.2°C in 10 seconds.

[0057] It should be noted that a temperature change value greater than the set value can indicate that the liquid being added is diesel, or it can indicate that the liquid being added is an unqualified urea solution, or other liquids that are not within the requirements, which will not be elaborated here. Furthermore, in a specific embodiment, the temperature change value needs to be adjusted according to the heating power of the heating element 22, the volume of the channel space 211, and the heating time.

[0058] According to some specific embodiments of the present invention, the prompting element is disposed on the pipe component 21 to improve integration.

[0059] Specifically, the pipe fitting 21 is equipped with a wire harness insert for easy connection of external plugs.

[0060] like Figure 1 As shown, according to some embodiments of the present invention, the urea system 100 further includes a vent pipe 40, one end of which is connected to the filling pipe 10, and the other end of which is connected to the urea tank, which is equipped with a vent valve. The vent pipe 40 facilitates smoother liquid filling.

[0061] The urea tank is equipped with a vent valve, which keeps the air pressure inside the urea tank stable.

[0062] Specifically, the end of the vent pipe 40 furthest from the urea tank is located at the end of the filling pipe 10 furthest from the urea tank, so as to give full play to the ventilation effect.

[0063] According to some embodiments of the present invention, the detection component 20 is disposed at the end of the filling pipe 10 away from the urea tank. By disposing of the detection component 20 at the end of the filling pipe 10 away from the urea tank, the detection component 20 can detect the liquid to be tested more quickly, further improving the reaction capability.

[0064] In some embodiments, the filling tube 10 is provided with a quick-connect fitting 11 so that the filling tube 10 can be quickly inserted into the urea tank.

[0065] In some embodiments, the vent pipe 40 is provided with a quick-connect fitting 41 so that the vent pipe 40 can be quickly connected to the urea tank.

[0066] In some embodiments, the filling pipe 10 is provided with a filling pipe fixing bracket 12, which is used to connect to the vehicle shell to position the filling pipe 10.

[0067] The following is combined Figure 1 , Figure 2 The urea system 100 of the present invention will be described in detail in this embodiment.

[0068] A urea system 100 includes: a urea tank, a filling tube 10, a detection component 20, an indicator, and a vent tube 40.

[0069] The filling pipe fixing bracket 12 and other brackets on the filling pipe 10 are used to fix the filling pipe 10 to the vehicle body. It connects to the urea tank via the filling pipe quick-connect connector 11, allowing urea solution to be added to the urea tank. Simultaneously, the vent pipe 40 is used to vent air during filling, ensuring smooth filling. The detection component 20 integrates a wiring harness plug and a speaker, and contains a heating element 22. It has an alarm function for detecting the type of filling fluid and transmitting signals.

[0070] The channel space 211 is connected to the filling pipe 10. When the vehicle body filling door is opened, the system recognizes the need for adding urea solution and activates the heating element 22. During the addition of urea solution, a small amount of liquid enters the sensor and is heated by the internal heating element 22. After 10 seconds, the system detects the temperature change of the added liquid to determine if the added liquid is qualified. The bottom of the channel space 211 is connected back to the filling pipe 10 through the discharge channel 213, ensuring that the liquid in the channel space 211 can flow back after 20 minutes, while preventing excessively rapid loss from affecting the filling detection.

[0071] The specific heat capacity of standard urea aqueous solution is (3.9-4.5) J / g·K, and its density is approximately 1.05 g / ml. The specific heat capacity of diesel is approximately 2.1 J / g·K, and its density is approximately 0.85 g / ml. According to Q = cmΔt = pt and m = ρv, under the same heat transfer and the same volume, the temperature change factor between the two can be calculated as: Δt(diesel) / Δt(urea aqueous solution) = 2.3 to 2.6 times. The channel space 211 is designed with a volume of 2 ml. Therefore, a 5W heater will raise the temperature of diesel by approximately 12°C and the temperature of urea aqueous solution by approximately 4.6°C to 5.2°C within 10 seconds. When the filling door is opened, the heating element 22 is activated, starting the heating function. The temperature sensor 23 checks the temperature every 10 seconds. When Δt ≤ 7℃, the filling fluid is considered qualified, and no warning is given. When Δt > 7℃, it is determined that the filling fluid is diesel or an unqualified urea solution. The internal signal is fed back to the speaker, triggering a "beep beep" alarm sound for warning purposes. At the same time, the alarm signal is sent to the instrument, reminding the customer that there is a problem with the filling fluid and to promptly go to the nearest service station for repair and inspection. The temperature sensor continuously monitors the filling process and makes a judgment every 10 seconds. Only one unqualified test during this period is required to trigger the alarm.

[0072] like Figure 3 , Figure 4 As shown, according to the control method of the urea system of the present invention, the urea system 100 includes: a urea tank and a filling pipe 10, the filling pipe 10 is connected to the urea tank, and a detection component 20 is provided on the filling pipe 10. The detection component 20 includes: a pipe fitting 21, a heating element 22 and a temperature sensing element 23. The pipe fitting 21 has a channel space 211, the channel space 211 is connected to the filling pipe 10, and the temperature sensing element 23 and the heating element 22 are disposed on the pipe fitting 21.

[0073] Control methods include:

[0074] S12: Control the heating element 22 to heat the liquid in the channel space 211, and control the temperature sensing element 23 to obtain the first temperature of the liquid.

[0075] Specifically, the vehicle has a body filling door, which, when opened, controls the heating element 22 to heat the liquid in the channel space 211, thereby improving the reactivity.

[0076] S13: At set intervals, control the temperature sensor 23 to obtain the second temperature of the liquid and obtain the temperature change value between the first temperature and the second temperature.

[0077] Specifically, with a set time of 10 seconds, the temperature of the liquid in the channel space 211 rises from a first temperature to a second temperature under the heating of the heating element 22. Utilizing the difference in specific heat capacity of different substances, the temperature change value is used to determine whether the liquid in the channel space 211 is urea.

[0078] According to the control method of the present invention, the liquid in the filling pipe 10 can be quickly detected by detecting temperature change values, thereby avoiding the incorrect filling of diesel fuel.

[0079] According to some embodiments of the present invention, the urea system 100 further includes a warning device, and the control method further includes: if the temperature change value is greater than a set value, controlling the warning device to issue a warning. By setting the warning device to issue a warning, it is convenient for the user to notice.

[0080] Specifically, the notification device includes a speaker that emits a notification sound when the temperature change exceeds a set value, making it convenient for the user to receive information.

[0081] Specifically, the notification features include: a notification light that emits a warning light when the temperature change exceeds a set value, making it easier for the user to receive information.

[0082] Specifically, the set value is 7°C. When the temperature change is greater than 7°C, the prompt will issue a warning.

[0083] According to some embodiments of the present invention, the volume of the channel space 211 is 2ml, the power of the heating element 22 is 5w, and the set time is 10s, so that the temperature change values ​​are significantly different and misjudgment is avoided.

[0084] For example, the heating element 22 raises the temperature of diesel fuel by about 12°C in 10 seconds, and the heating element 22 raises the temperature of urea aqueous solution by about 4.6°C to 5.2°C in 10 seconds.

[0085] It should be noted that a temperature change value greater than the set value can indicate that the liquid being added is diesel, or it can indicate that the liquid being added is an unqualified urea solution, or other liquids that are not within the requirements, which will not be elaborated here. Furthermore, in a specific embodiment, the temperature change value needs to be adjusted according to the heating power of the heating element 22, the volume of the channel space 211, and the heating time.

[0086] Specifically, the control method further includes S14: if the temperature change between the first temperature and the second temperature is less than or equal to 7°C, at set intervals, the temperature sensor 23 is controlled to acquire the third temperature of the liquid and obtain the temperature change between the second temperature and the third temperature. When the temperature change between the second temperature and the third temperature is greater than 7°C, the control prompting device issues a prompt.

[0087] More specifically, steps S13 and S14 are executed cyclically.

[0088] Specifically, the control method also includes S15: the body filling door is closed, the heating element 22 is stopped working, and the temperature sensing element 23 is silenced.

[0089] The vehicle according to an embodiment of the present invention includes the urea system described above.

[0090] The vehicle according to an embodiment of the present invention, by utilizing the urea system described above, can quickly detect the liquid in the filling pipe, thereby improving rapid response capability.

[0091] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method of a urea system, the urea system (100) comprising: A urea tank and a filling pipe (10) are provided, the filling pipe (10) being connected to the urea tank. A detection component (20) is provided on the filling pipe (10), the detection component (20) including: a pipe fitting (21), a heating element (22), and a temperature sensor (23). The pipe fitting (21) has a channel space (211) connected to the filling pipe (10). The temperature sensor (23) and the heating element (22) are located on the pipe fitting (21). The control method includes: The heating element (22) is controlled to heat the liquid in the channel space (211), and the temperature sensing element (23) is controlled to obtain the first temperature of the liquid; At set intervals, the temperature sensor (23) is controlled to acquire the second temperature of the liquid and obtain the temperature change value between the first temperature and the second temperature; If the temperature change value is greater than the set value, the control prompt will issue a prompt. If the temperature change value is less than or equal to the set value, the temperature sensor (23) is controlled to obtain the third temperature of the liquid at a set interval, and the temperature change value between the second temperature and the third temperature is obtained.

2. The control method of a urea system according to claim 1, characterized by, The pipe fitting (21) has an inlet channel (212) and an outlet channel (213). One end of the inlet channel (212) is connected to the filling pipe (10) and the other end is connected to the channel space (211). One end of the outlet channel (213) is connected to the filling pipe (10) and the other end is connected to the channel space (211). The diameter of the outlet channel (213) is smaller than the diameter of the inlet channel (212).

3. The control method of a urea system according to claim 1, characterized by Also includes: A prompting element electrically connected to the temperature sensor (23) is provided to issue a prompt when the temperature change value exceeds a set value.

4. The control method of a urea system according to claim 3, characterized in that, The notification device includes a speaker and / or a notification light, and emits a notification sound and / or a notification light when the temperature change value is greater than a set value.

5. The control method of a urea system according to claim 1, characterized by Also includes: A vent pipe (40) is provided, one end of which is connected to the filling pipe (10) and the other end of which is connected to the urea tank. The urea tank is equipped with a vent valve.

6. A control method of a urea system according to any one of claims 1 to 5, characterized in that, The detection component (20) is located at the end of the filling tube (10) away from the urea tank.

7. A vehicle characterized by comprising: Includes the urea system according to any one of claims 1 to 6.

Images