CN210222535U - Urea case maintenance device - Google Patents
Urea case maintenance device Download PDFInfo
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- CN210222535U CN210222535U CN201921420944.9U CN201921420944U CN210222535U CN 210222535 U CN210222535 U CN 210222535U CN 201921420944 U CN201921420944 U CN 201921420944U CN 210222535 U CN210222535 U CN 210222535U
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- probe
- urea
- chip
- temperature acquisition
- fault signal
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000004202 carbamide Substances 0.000 title claims abstract description 81
- 238000012423 maintenance Methods 0.000 title claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 50
- 238000004891 communication Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012031 short term test Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides a urea case maintenance device, including singlechip chip, fault signal display circuit board, first temperature acquisition probe, second temperature acquisition probe, liquid level probe and urea concentration probe, wherein: the single chip microcomputer chip is connected with a urea box to be maintained through a first CAN communication chip and connected with a vehicle ECU through a second CAN communication chip, and the fault signal display circuit board, the first temperature acquisition probe, the second temperature acquisition probe, the liquid level probe and the urea concentration probe are respectively connected with the single chip microcomputer chip; the single chip microcomputer chip receives signals sent by the processor module of the urea box to be maintained through the first CAN communication chip, and sends detection signals acquired by the first temperature acquisition probe, the second temperature acquisition probe, the liquid level probe and the urea concentration probe to an ECU of the vehicle through the second CAN communication chip. The utility model discloses repair the detection function of damaged sensor under the prerequisite of the processor module of not changing the urea case to reduce cost of maintenance.
Description
Technical Field
The utility model belongs to the technical field of the engine test and specifically relates to a urea case maintenance device is related to.
Background
With the implementation of the national six standard, the urea box is also upgraded and updated to meet the emission requirements of the national six standard. As shown in fig. 1, a typical urea tank 100 conforming to the national six standards is shown, and includes a processor module 101, and a urea concentration sensor 102, a first temperature sensor 103, a second temperature sensor 104, and a liquid level sensor 105 connected to the processor module 101, where the processor module 101 is in signal connection with a vehicle ECU (Electronic Control Unit) through a CAN communication interface.
Specifically, the method comprises the following steps: the urea concentration sensor 102 is used for acquiring a urea concentration signal in the urea tank, the liquid level sensor 105 is used for acquiring a liquid level signal in the urea tank, and the first temperature sensor 103 and the second temperature sensor 104 are used for acquiring a temperature signal in the urea tank respectively. The processor module 101 processes the urea concentration signal, the liquid level signal and the temperature signal and then sends the processed signals to the vehicle ECU through the CAN communication interface, so that the monitoring of the internal parameters of the urea box is realized. The purpose of arranging two sets of temperature sensors is to ensure the accuracy of the temperature signals by mutual calibration.
After a period of use, one or more sensors in the urea tank 100 may be damaged, resulting in an error in the corresponding one or more detection signals. In the prior art, the processor module 101 of the urea tank 100 is a fully sealed structure, and cannot be disassembled. Therefore, only the entire urea tank 100 can be replaced once a detection signal error occurs. The maintenance mode in the prior art causes huge resource waste, and increases the maintenance cost of the urea box.
In view of the above, there is a need for a dedicated urea tank maintenance device that can quickly detect a damaged target sensor and recover the corresponding detection function of the damaged sensor without replacing the processor module of the urea tank, thereby reducing the urea tank maintenance cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a urea case maintenance device, its detailed technical scheme as follows:
the utility model provides a urea case maintenance device, its includes singlechip chip, fault signal display circuit board, first temperature acquisition probe, second temperature acquisition probe, liquid level probe and urea concentration probe, wherein:
the single chip microcomputer chip is connected with a processor module of the urea box to be maintained through a first CAN communication chip, the single chip microcomputer chip is connected with a vehicle ECU through a second CAN communication chip, and the fault signal display circuit board, the first temperature acquisition probe, the second temperature acquisition probe, the liquid level probe and the urea concentration probe are respectively connected with the single chip microcomputer chip;
the single chip microcomputer chip is configured to receive detection signals sent by a processor module of the urea box to be maintained through the first CAN communication chip, and the single chip microcomputer chip is further configured to send the detection signals acquired by the first temperature acquisition probe, the second temperature acquisition probe, the liquid level probe and the urea concentration probe to a vehicle ECU through the second CAN communication chip.
In some embodiments, the fault signal display circuit board is provided with a first fault signal display lamp, a second fault signal display lamp, a third fault signal display lamp and a fourth fault signal display lamp.
In some embodiments, the controller further comprises a power conversion circuit, an input end of the power conversion circuit is connected to a power end of a vehicle, and an output end of the power conversion circuit is connected to the single chip, the first CAN communication chip and the second CAN communication chip respectively.
In some embodiments, the power conversion circuit board adopts a voltage regulation circuit with a model number LM 2596.
In some specific embodiments, the single chip microcomputer chip is a single chip microcomputer chip with a model number of STM32-F105RCT6, and the first CAN communication chip and the second CAN communication chip are both CAN communication chips with a model number of Tja 1050.
The utility model provides a urea case maintenance device, the sensor that has damaged of its one side can detect out the urea incasement fast, and on the other hand can restore the detection function of this damaged sensor under the prerequisite of the processor module of not changing the urea case to reduce urea case cost of maintenance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings which are needed in the embodiments and are practical will be briefly described below and will be obvious, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. Wherein,
FIG. 1 is a schematic diagram of a typical urea tank;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As is well known to those skilled in the art, for a specific specification of the urea tank to be detected, the temperature, the urea concentration and the urea level in the urea tank should be within a certain range, for example, in some embodiments, the temperature in the urea tank to be detected is limited to-35 ℃ to 80 ℃, and accordingly, if the temperature sensor works normally, the output detection signal of the temperature sensor necessarily corresponds to the temperature range. Therefore, under the normal working condition of the temperature sensor, the urea concentration sensor and the liquid level sensor in the urea box to be detected, the output detection signals are correspondingly within a certain preset range. If the detection signal output by a certain sensor exceeds the predetermined range, it can be judged that the sensor has been damaged.
The utility model discloses just provide based on above-mentioned principle, as shown in fig. 2, the embodiment of the utility model provides a urea case maintenance device 200 includes singlechip chip 201, fault signal display circuit board 202, first temperature acquisition probe 203, second temperature acquisition probe 204, liquid level probe 205 and urea concentration probe 206. The single chip microcomputer chip 201 is in signal connection with a processor module of the urea box 100 to be maintained through a first CAN communication chip 207, and the single chip microcomputer chip 201 is connected with the vehicle ECU300 through a second CAN communication chip 208. The fault signal display circuit board 202, the first temperature acquisition probe 203, the second temperature acquisition probe 204, the liquid level probe 205 and the urea concentration probe 206 are respectively connected with the single chip microcomputer 201. Wherein: the single chip microcomputer chip 201 receives a signal sent by the processor module of the urea box 100 to be maintained through the first CAN communication chip 207. As mentioned in the background of the invention section above, the detection signals include a first temperature signal, a second temperature signal, a level signal, and a urea concentration signal.
In some embodiments, the present invention adopts a single chip microcomputer chip with model number STM32-F105RCT6 as the single chip microcomputer chip 201, and adopts a CAN communication chip with model number Tja1050 as the first CAN communication chip 207 and the second CAN communication chip 208.
The fault signal display circuit board 202 is used for displaying an error detection signal. In some embodiments, the fault signal display circuit board 202 is provided with a first fault signal display lamp LED1, a second fault signal display lamp LED2, a third fault signal display lamp LED3 and a fourth fault signal display lamp LED 4. The first fault signal display lamp LED1 corresponds to the first temperature signal, and when the first temperature signal sent by the processor module of the urea box 100 to be maintained exceeds a predetermined range, the first fault signal display lamp LED1 is turned on, which indicates that the first temperature sensor in the urea box 100 to be maintained is damaged; the second fault signal indicator light LED2 corresponds to the second temperature signal, and when the second temperature signal sent by the processor module of the urea box 100 to be repaired exceeds a predetermined range, the second fault signal indicator light LED2 is lighted; the third fault signal indicator light LED3 corresponds to the urea concentration signal, and when the urea concentration signal sent by the processor module of the urea box 100 to be maintained exceeds a preset range, the third fault signal indicator light LED3 is lightened; the fourth fault signal indicator light LED3 corresponds to a liquid level signal, and when the liquid level signal from the processor module of the urea tank 100 to be serviced exceeds a predetermined range, the fourth fault signal indicator light LED4 is illuminated.
For example, in some embodiments, the driving circuits of the four fault signal indicating lamps are designed to match the predetermined range of the corresponding detection signals. When a certain detection signal received by the one-chip microcomputer chip 201 is within a predetermined range corresponding to the detection signal, the driving circuit of the corresponding fault signal display lamp cannot be turned on, and the fault signal display lamp cannot be turned on.
It should be noted that, the specific structure of the driving circuit of the fault signal display lamp, and those skilled in the art can adopt the known circuit structure as required, which is not the object of the present invention, and therefore, the description is not repeated.
It is visible, through single chip microcomputer chip 201 and the signal interaction of treating maintenance urea case 100, the utility model discloses can realize treating the short-term test of the sensor in the maintenance urea case 100 and confirm the target sensor who damages.
Further, after determining the target sensor that damages, the utility model discloses can insert the probe that has the same function that corresponds to on singlechip chip 201 to under the prerequisite of waiting to maintain urea case 100 not changing, resume the function of the sensor of damage, thereby reduce the cost of maintenance of urea case. Specifically, the method comprises the following steps:
when the first fault signal display lamp LED1 is lighted, it indicates that the self-contained first temperature sensor 103 in the urea box 100 to be repaired is damaged, and at the moment, the first temperature acquisition probe 203 is connected to the single chip microcomputer chip 201. The first temperature acquisition probe 203 acquires a first temperature signal and transmits the acquired first temperature signal to the single chip microcomputer chip 201, and the single chip microcomputer chip 201 transmits the first temperature signal to the vehicle ECU300 through the second CAN communication chip 208. Thereby achieving the restoration of the first temperature signal. In a synchronous manner, the rest three signals (the second temperature signal, the urea concentration signal and the liquid level signal) are still acquired by the undamaged second temperature sensor 104, the urea concentration sensor 102 and the liquid level sensor 105 which are arranged in the urea tank 100 to be maintained, are processed by the processor module 101 of the urea tank 100 to be maintained and then are sent to the single chip microcomputer chip 201, and the single chip microcomputer chip 201 sends the signals to the vehicle ECU300 through the second CAN communication chip 208.
Similarly, when the second fault signal display lamp LED2 is lit, the second temperature collecting probe 204 is connected to the single chip microcomputer chip 201, so that the second temperature signal is repaired.
When the third fault signal display lamp LED3 is lit, the liquid level probe 205 is inserted into the one-chip microcomputer chip 201 to achieve the restoration of the liquid level signal.
When the fourth fault signal indicator light LED4 is lit, the urea concentration probe 206 is connected to the urea tank 100 to be serviced to effect a repair of the urea concentration signal.
Please refer to fig. 2, in order to achieve the nearby power supply. In some embodiments, the utility model discloses still include power conversion circuit 209, the power end of vehicle is connected to power conversion circuit 209's input, and singlechip chip 201, first CAN communication chip 207 and second CAN communication chip 208 are connected respectively to power conversion circuit 209's output to the realization is to singlechip chip 201, first CAN communication chip 207 and second CAN communication chip 208's power supply. In some embodiments, the power conversion circuit board 209 employs a voltage regulation circuit model LM 2596. The power supply device CAN convert 24V or 12V power output by a power supply end of a vehicle into voltage required by the single chip microcomputer chip 201, the first CAN communication chip 207 and the second CAN communication chip 208.
The invention has been described above with a certain degree of particularity and detail. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that may be made without departing from the true spirit and scope of the present invention are intended to be within the scope of the present invention. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (5)
1. The utility model provides a urea case maintenance device which characterized in that: it includes singlechip chip, fault signal display circuit board, first temperature acquisition probe, second temperature acquisition probe, liquid level probe and urea concentration probe, wherein:
the single chip microcomputer chip is connected with a processor module of the urea box to be maintained through a first CAN communication chip, the single chip microcomputer chip is connected with a vehicle ECU through a second CAN communication chip, and the fault signal display circuit board, the first temperature acquisition probe, the second temperature acquisition probe, the liquid level probe and the urea concentration probe are respectively connected with the single chip microcomputer chip;
the single chip microcomputer chip is configured to receive signals sent by a processor module of the urea box to be maintained through the first CAN communication chip, and the single chip microcomputer chip is further configured to send detection signals acquired by the first temperature acquisition probe, the second temperature acquisition probe, the liquid level probe and the urea concentration probe to a vehicle ECU of a vehicle through the second CAN communication chip.
2. The urea tank servicing device of claim 1, wherein: and a first fault signal display lamp, a second fault signal display lamp, a third fault signal display lamp and a fourth fault signal display lamp are arranged on the fault signal display circuit board.
3. The urea tank servicing device of claim 1, wherein: the power supply device further comprises a power supply conversion circuit, wherein the input end of the power supply conversion circuit is connected to the power supply end of a vehicle, and the output end of the power supply conversion circuit is respectively connected with the single chip microcomputer chip, the first CAN communication chip and the second CAN communication chip.
4. The urea tank maintenance device of claim 3, wherein the power conversion circuit board employs a voltage regulation circuit of type LM 2596.
5. The urea tank servicing device of claim 1, wherein: the single chip microcomputer chip is STM32-F105RCT6, and the first CAN communication chip and the second CAN communication chip are both Tja1050 CAN communication chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921420944.9U CN210222535U (en) | 2019-08-29 | 2019-08-29 | Urea case maintenance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921420944.9U CN210222535U (en) | 2019-08-29 | 2019-08-29 | Urea case maintenance device |
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| Publication Number | Publication Date |
|---|---|
| CN210222535U true CN210222535U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921420944.9U Active CN210222535U (en) | 2019-08-29 | 2019-08-29 | Urea case maintenance device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606024A (en) * | 2021-08-11 | 2021-11-05 | 安徽江淮汽车集团股份有限公司 | Method and system for diagnosing faults of temperature sensor of urea box |
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2019
- 2019-08-29 CN CN201921420944.9U patent/CN210222535U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606024A (en) * | 2021-08-11 | 2021-11-05 | 安徽江淮汽车集团股份有限公司 | Method and system for diagnosing faults of temperature sensor of urea box |
| CN113606024B (en) * | 2021-08-11 | 2022-07-22 | 安徽江淮汽车集团股份有限公司 | Method and system for diagnosing faults of temperature sensor of urea box |
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