CN214836644U - Urea pipe unfreezing detection device - Google Patents
Urea pipe unfreezing detection device Download PDFInfo
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- CN214836644U CN214836644U CN202121377249.6U CN202121377249U CN214836644U CN 214836644 U CN214836644 U CN 214836644U CN 202121377249 U CN202121377249 U CN 202121377249U CN 214836644 U CN214836644 U CN 214836644U
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- urea
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- electronic control
- heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The utility model discloses a urea tube unfreezing detection device, which comprises a power supply, an electronic control unit, a junction box, a simulator and a urea system; the urea system comprises a urea pump, a urea box and a urea nozzle; urea in the urea box is sprayed out from a urea nozzle through a urea pump; the power supply is electrically connected with the electronic control unit, the simulator and the junction box; the electronic control unit is electrically connected with the simulator and the urea system through the junction box, an electric signal of the urea system is transmitted to the simulator through the junction box, a control signal of the electronic control unit is transmitted to the urea system through the junction box, and the simulator drives the electronic control unit; the urea system also comprises a heater which circularly heats the pipeline and/or the urea box. The utility model discloses urea pipe check out test set that unfreezes can follow the equipment that vibrates, pulse, ambient temperature, the many-sided comprehensive properties that detect the urea pipe of electrical property respectively.
Description
Technical Field
The utility model relates to the field of automotive technology, more specifically relates to a urea pipe check out test set that unfreezes.
Background
Urea pipe belongs to diesel vehicle aftertreatment system field. At present, after-treatment systems on automobiles realize energy conservation and emission reduction through SCR systems to meet the requirements of national laws and regulations. However, the conventional three-comprehensive experiment table with vibration, pulse and temperature alternation frequently solves the quality problem of the urea pipe in the market, and urea cannot be used as a medium for experiment, so that the product is difficult to be fully verified.
Disclosure of Invention
The utility model is used for solve the problem that the background art relates. The utility model discloses a urea pipe check out test set that unfreezes can use urea to add into as the laboratory bench of medium and with electricity detection for detect the verification of the electricity correlation problem of urea pipe product.
The utility model provides a urea tube unfreezing detection device, which comprises a power supply, an electronic control unit, a junction box, a simulator and a urea system; the urea system comprises a urea pump, a urea box and a urea nozzle; the urea tank is connected with a urea pump pipeline, the urea pump is connected with a urea nozzle pipeline, and urea in the urea tank is sprayed out from a urea nozzle through the urea pump; the power supply is electrically connected with the electronic control unit, the simulator and the junction box; the electronic control unit is electrically connected with the simulator and the urea system through the junction box, wherein an electric signal of the urea system is transmitted to the simulator through the junction box, a control signal of the electronic control unit is transmitted to the urea system through the junction box, and the simulator drives the electronic control unit; the urea system further comprises a heater, when the simulator drives the electronic control unit to control the urea system to supply urea, the heater circularly heats the pipeline and/or the urea box, the circular heating is to control the heater to heat, if the urea system cannot supply urea, the next heating is carried out, wherein the current heating power is larger than or equal to the previous heating power.
Preferably, the alarm is issued when the number of times of performing the circulation heating reaches a set upper limit of the number of times.
Preferably, after the alarm is relieved, when the simulator drives the electronic control unit to control the urea system to supply urea, the heating power is restarted to circularly heat the pipeline and/or the urea box.
Preferably, if the urea system is still unable to supply urea by heating at the restart heating power, it is determined that the urea system is malfunctioning.
Preferably, the heating power of the heater is decreased with the time in each heating process, and the current initial heating power is greater than or equal to the previous initial heating power, and the current end heating power is greater than or equal to the previous end heating power.
Preferably, the system further comprises a temperature sensor, a pressure sensor and a current sensor, wherein the temperature sensor is used for sensing the temperature of the urea system, the pressure sensor is used for sensing the pipeline pressure of the urea system, and the current sensor is used for sensing the current signal of the electric connection.
The utility model discloses a simulator drive ECU work orders the urea pump to start, builds the pressure for the urea pipe and reaches and spout from the nozzle behind the injection condition. And the urea pipe is arranged in the environment box, so that the heating function of the urea pipe is started in the environment box, and the comprehensive performance of the urea pipe is verified from various aspects of vibration, pulse, environment temperature and electrical performance along with vibration.
Drawings
FIG. 1 is a schematic structural diagram of a urea tube thawing detection apparatus according to the present invention;
FIG. 2 is the monitoring system schematic diagram of the utility model discloses urea pipe thawing detection equipment.
Description of reference numerals:
the device comprises a power supply 1, an electronic control unit ECU2, a distribution box 3, a simulator 4, a urea pump 5, a urea box 6 and a urea nozzle 7.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
FIG. 1 is a schematic structural diagram of the thawing detection device for urea pipes of the present invention. As shown in fig. 1, the embodiment of the present invention provides a urea pipe thawing detection apparatus, which includes a power supply 1, an electronic control unit ECU2, a junction box Bob 3, a simulator 4, and a urea system. The power supply 1 is electrically connected to the electronic control unit 2, the simulator 4, and the junction box 3, thereby providing power support to the entire system of equipment.
Therefore, the electronic control unit ECU2 is electrically connected to the simulator 4 and the urea system through the distribution box 3, wherein an electric signal of the urea system is transmitted to the simulator 4 through the distribution box 3, a control signal of the electronic control unit 2 is transmitted to the urea system through the distribution box 3, and the simulator 4 drives the electronic control unit 2. The simulator 4 provides a virtual environment to enable the electronic control unit ECU2 to realize starting work, and the electronic control unit ECU2 controls the junction box Bob 3 to supply power to the urea system and control the starting and the working of the urea system.
Further, in fig. 1, the urea system specifically includes a urea pump 5, a urea tank 6, and a urea nozzle 7. Wherein, urea case 6 passes through urea pipe both way junction with urea pump 5, and urea pump 5 passes through urea union coupling with urea nozzle 7, and urea in the urea case 6 is spouted by urea nozzle 7 through urea pump 5. That is, the urea pump 5, the urea tank 6, and the urea nozzle 7 in the urea system are connected by a urea pipe.
So, place in the environment box through the urea hydraulic pipeline of being connected urea pump 5 and urea nozzle 7, give an external environment temperature of urea pipe, make urea pipe simulation reality ambient temperature carry out work to reach the comprehensive properties who verifies the urea pipe.
In the urea tube unfreezing detection device, power is supplied to the urea tube through an electronic control unit ECU2, and unfreezing, heating and pressure building of urea in the tube are carried out.
Further, the urea system also comprises a heater (not shown in the figure), which may be in the urea tank 6. When the simulator 4 drives the electronic control unit 2 to control the urea system to supply urea, the heater circularly heats the urea tank 6 and/or the pipeline. The cyclic heating is performed by controlling the heater, and if the urea system cannot supply urea, the next heating is performed.
Optionally, the thawing heating time is controlled in a closed loop. The urea thawing time which is initially calibrated cannot be thawed, power is supplied to the urea pipe again after the pressure build-up of the urea pump 5 fails, and thawing and heating are carried out until the pressure build-up of the urea pump 5 is successful;
optionally, the current heating power is greater than or equal to the previous heating power. The urea box or the urea pipeline is heated in a circulating heating mode, so that starting with low heating power is guaranteed at the beginning, and if the urea cannot be normally supplied, the heating power is increased. When the heating function is restarted, if the heating function is heated at full power, the heating power is not changed next time.
In a preferred embodiment, the heating power and the heating times of the urea which is successfully supplied by past experience can be recorded by a computer, intelligent judgment is carried out by combining the current working conditions (such as the external temperature, the pipeline pressure and the like), and the initial heating power under different working conditions is intelligently determined by autonomous learning.
In the preferred embodiment of the present invention, if the number of times of the circulation heating reaches the set upper limit of the number of times, an alarm is given.
The utility model discloses in urea pipe unfreeze the preferred embodiment of check out test set, after removing the alarm, drive when simulator 4When the urea system is controlled by the dynamic electronic control unit 2 to supply urea, the pipeline and/or the urea box 6 are/is circularly heated by restarting heating power. Wherein the restart heating power is P1Maximum power of heating power is P2Then, there is, 1.1 × P2≤P1≤1.2*P2. By setting the restarting power, the system which can not normally supply urea after a heating cycle is ensured to heat with higher power, and urea supply is realized.
The utility model discloses among the urea pipe check out test set that unfreezes, can carry out urea pipeline hydraulic function detection and fault simulation. The leakage, blockage and bending of a urea pipe in the urea system can cause the pressure build-up failure of a urea pump, so that the urea nozzle stops spraying; when the hydraulic function of the urea pipeline is normal, the pressure of the urea pump is normal, and the urea nozzle sprays normally.
The utility model discloses among the urea pipe check out test set that unfreezes, can carry out urea pipeline electric function and detect and fault simulation. The urea pipe in the urea system is connected with a plug-in unit in an open circuit and is in poor contact, and the short circuit to the ground and the power supply can cause the pressure build-up failure of a urea pump, so that the urea nozzle stops spraying; when the hydraulic function of the urea pipeline is normal, the pressure of the urea pump is normal, and the urea nozzle sprays normally.
The utility model discloses among the urea pipe check out test set that unfreezes, can detect three urea pipes in the urea system simultaneously
The utility model discloses in urea pipe unfreezing check out test set's preferred embodiment, if heat with restarting heating power, urea system still can't supply with urea, then judges that urea system breaks down.
The utility model discloses in urea pipe unfreezing check out test set's preferred embodiment, the heater has time interval T before heating to next time after heating at every turn, and it is T that the time is long when the heater is heating at every turn, then has T ≦ T. A time interval is left to prevent the danger of continuous heating.
The utility model discloses in urea pipe unfreezing check out test set's preferred embodiment, at every turn in the heating process, the heating power of heater diminishes with the lapse of time, and the initial heating power of current time is more than or equal to the initial heating power of previous time, and the heating power of current time end is more than or equal to the heating power of previous time end. In the heating process, the heating power of each heating is gradually reduced along with the time lapse, so that the long-time heating, the overhigh heat and the damage to the device are prevented.
FIG. 2 is the monitoring system schematic diagram of the utility model discloses urea pipe thawing detection equipment. As shown in fig. 2, the monitoring system mainly comprises a temperature sensor, a pressure sensor, a current sensor, a lower computer, an upper computer and the like. The temperature sensor is used for sensing the temperature of the urea system, the pressure sensor is used for sensing the pipeline pressure of the urea system, and the current sensor is used for sensing the current signal of the electric connection.
The utility model discloses in urea pipe unfreezing check out test set's preferred embodiment, adopt the integrated control cabinet form, during all the equal integrated installation of electrical component was arranged a switch board, detected data and transmitted the lower computer reading of switch board for through the cable by each on-the-spot monitoring sensor.
The PC end of the upper computer adopts an industrial control computer, LabVIEW of American NI company is adopted, and the lower computer adopts a professional high-frequency PLC controller. The upper computer PC mainly provides a monitoring interface, and each path is tested to form data and curves including real-time curves of pressure-time, temperature-time, current-time and the like; the lower computer high-frequency controller is the core of the function action of the whole equipment, and except a detection interface provided by an upper computer PC and the like, the signal acquisition and processing of the equipment are realized by the controller.
The detection requirements for the urea pipes in the urea system are as follows, a plurality of urea pipes can be detected simultaneously, and the detection contents comprise:
heating current of a urea tube: the range is 0-10A, the acquisition frequency is 10HZ, and the error is 5%;
urea in-pipe temperature (upstream temperature): the range is-40 ℃ to 120 ℃, the acquisition frequency is 10HZ, and the error is 5 percent;
urea in-pipe temperature (downstream temperature): the range is-40 ℃ to 120 ℃, the acquisition frequency is 10HZ, and the error is 5 percent;
urea line pressure (front end pressure): absolute pressure in the range of 0bar-20bar, acquisition frequency of 10HZ and error of 5 percent;
urea line pressure (rear end pressure): absolute pressure in the range of 0bar-20bar, acquisition frequency of 10HZ and error of 5 percent;
the information needs to be detected, displayed and recorded in real time and can be copied through a USB.
The specific performance parameter table is as follows:
the utility model discloses urea pipe unfreezes check out test set's main equipment inventory shows as follows the table:
the utility model discloses urea pipe check out test set that unfreezes has following main function and characteristics:
1) high integration: the overall dimension, color, performance, component brand and communication of each module are designed according to JRT requirements, and the JRT special control integrates the control of each module onto a main control computer, so that a computer control system can comprehensively control and display each test parameter in real time, all operations can be completed on the computer system, and the operation is more convenient.
2) The pressure, temperature, current and the like can be sampled in real time.
3) The utility model discloses the precision and the stability that detect have been guaranteed to the component that takes in the quality of control principle and component.
The utility model discloses a simulator drive ECU work orders the urea pump to start, builds the pressure for the urea pipe and reaches and spray from the nozzle blowout behind the condition to the realization is with ECU drive urea pump, urea pipe, urea nozzle linkage work fully verify the product. And the urea pipe is arranged in the environment box, so that the heating function of the urea pipe is started in the environment box, and the comprehensive performance of the detection of the hydraulic function/electronic function and the fault simulation of the urea pipeline is verified from various aspects of vibration, pulse, environment temperature and electrical performance along with vibration.
The utility model discloses can also be to the heating time closed-loop control after unfreezing. For example, the initial calibration of the urea thawing time cannot complete the thawing, and after the urea pump fails to build the pressure, the urea pipe is powered again to thaw and heat until the urea pump successfully builds the pressure, so that the programming logic consistent with that of the whole vehicle is realized.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A urea tube unfreezing detection device is characterized by comprising a power supply (1), an electronic control unit (2), a junction box (3), a simulator (4) and a urea system;
the power supply (1) is electrically connected with the electronic control unit (2), the junction box (3) and the simulator (4);
the urea system comprises a urea pump (5), a urea box (6) and a urea nozzle (7); the urea box (6) is connected with a pipeline of the urea pump (5), the urea pump (5) is connected with a pipeline of the urea nozzle (7), and urea in the urea box (6) is sprayed out from the urea nozzle (7) through the urea pump (5);
the electronic control unit (2) is electrically connected with the simulator (4) and the urea system through a junction box (3); the electrical signal of the urea system is transmitted to the simulator through the junction box (3), the control signal of the electronic control unit (2) is transmitted to the urea system through the junction box, and the simulator drives the electronic control unit.
2. The urea pipe thawing detection apparatus of claim 1,
the urea system further comprises a heater, and when the simulator (4) drives the electronic control unit (2) to control the urea system to supply urea, the heater circularly heats a pipeline and/or the urea box (6).
3. The urea pipe thawing detection apparatus of claim 2, wherein the cyclic heating is performed by controlling the heater to heat, and performing the next heating if the urea system cannot supply urea, wherein the current heating power is greater than or equal to the previous heating power; and if the number of times of the cyclic heating reaches the set upper limit of the number of times, giving an alarm.
4. Urea tube thaw detection apparatus according to claim 3, characterized in that the circuit and/or the urea tank (6) is cyclically heated at restart heating power when the simulator (4) drives the electronic control unit (2) to control the urea system to supply urea after the alarm is deactivated.
5. The urea pipe thawing detection apparatus of claim 4, wherein the urea system is determined to be malfunctioning if the urea system is still unable to supply urea when heating is performed at the restart heating power.
6. The urea pipe defrosting detection apparatus of claim 5, wherein the heating power of the heater is decreased with time during each heating process, and the current initial heating power is greater than or equal to the previous initial heating power, and the current end heating power is greater than or equal to the previous end heating power.
7. The urea pipe thaw detection apparatus according to any one of claims 1-6, further comprising a temperature sensor for sensing a temperature of the urea system, a pressure sensor for sensing a line pressure of the urea system, and a current sensor for sensing a current signal of an electrical connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121377249.6U CN214836644U (en) | 2021-06-21 | 2021-06-21 | Urea pipe unfreezing detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121377249.6U CN214836644U (en) | 2021-06-21 | 2021-06-21 | Urea pipe unfreezing detection device |
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| CN214836644U true CN214836644U (en) | 2021-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251165A (en) * | 2021-12-08 | 2022-03-29 | 潍柴动力股份有限公司 | Pressure pipe power detection method and device, storage medium and vehicle |
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- 2021-06-21 CN CN202121377249.6U patent/CN214836644U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251165A (en) * | 2021-12-08 | 2022-03-29 | 潍柴动力股份有限公司 | Pressure pipe power detection method and device, storage medium and vehicle |
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