CN112761933A - Urea pump function testing system and method - Google Patents
Urea pump function testing system and method Download PDFInfo
- Publication number
- CN112761933A CN112761933A CN201911002224.5A CN201911002224A CN112761933A CN 112761933 A CN112761933 A CN 112761933A CN 201911002224 A CN201911002224 A CN 201911002224A CN 112761933 A CN112761933 A CN 112761933A
- Authority
- CN
- China
- Prior art keywords
- pump
- test
- urea
- upper computer
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 80
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 239000004202 carbamide Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000011990 functional testing Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 238000003745 diagnosis Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 7
- 238000007726 management method Methods 0.000 claims description 4
- 238000012797 qualification Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention belongs to the technical field of urea pumps, and particularly relates to a urea pump function testing system which comprises a PC (personal computer) upper computer, a control circuit board, a nozzle system, a urea pump system, a urea tank, a pressure sensor, an electromagnetic valve and a bar code gun; the testing system adopting the design has high precision and can perform milliliter-level high-precision testing; the automation degree is high, and after test parameters are configured, functional tests under various working conditions can be automatically completed, so that the test efficiency is effectively improved; the method has expansibility, and can be suitable for function tests under various standard protocols; the test cost is low, the liquid urea used in the test process can be recycled, and all sensors used in the test can adopt universal sensors.
Description
Technical Field
The invention belongs to the technical field of urea pumps, and particularly relates to a system and a method for testing functions of a urea pump.
Background
With the continuous improvement of the living standard of people, automobiles gradually become common consumer goods to go to the public, and then harmful gas emitted by large quantity of automobiles has great influence on the air quality. Therefore, the treatment of the automobile exhaust emission is particularly important, and the nation also provides a series of standards (nation four, nation five and nation six) for the automobile exhaust emission.
One important item in the automobile exhaust treatment of the diesel engine is to achieve the purpose of exhaust treatment by utilizing the chemical reaction of the diesel engine exhaust treatment liquid (urea) and the exhaust. The control of the injection amount of the exhaust gas treatment liquid is one of the core technologies of the exhaust emission treatment of the diesel engine, and the urea pump is used as a core execution mechanism. Therefore, the function test of the urea pump aiming at the exhaust emission is also very important.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a urea pump function test system and a method thereof, and has the characteristics that the test system has high precision, can perform milliliter-level high-precision test, has high automation degree, can automatically complete function tests under various working conditions after test parameters are configured, effectively improves the test efficiency, has expansibility, can adapt to the function tests under various standard protocols, has low test cost, and can recycle liquid urea used in the test process.
In order to achieve the purpose, the invention provides the following technical scheme: a urea pump function test system comprises a PC upper computer, a control circuit board, a nozzle system, a urea pump system, a urea tank, a pressure sensor, an electromagnetic valve and a bar code gun;
wherein:
the bar code gun is in signal connection with the PC upper computer and is used for controlling and recording a label of the urea pump and recording test data of a product for database management;
the PC upper computer is connected with the control circuit board through a CAN signal, the control circuit board converts a request instruction of the PC upper computer into a physical signal to control the urea pump system, the nozzle system and the electromagnetic valve, and simultaneously acquires a related parameter physical signal, converts the related parameter physical signal into a CAN signal and feeds back the CAN signal to the PC upper computer;
the PC upper computer is in signal connection with the pressure sensor and is used for collecting data of the weighing meter.
A method of a urea pump functional test system: the method comprises the following steps:
s1, installing a product to be tested: scanning a code by a bar code gun, and establishing database information of a test product;
s2, running PC upper computer software: carrying out self-checking diagnosis;
s3, pressure build stage diagnosis: firstly, controlling the closing (normally open) of an electromagnetic valve and the rotating speed of a motor to prevent urea from entering a pump from a liquid inlet tank of a urea tank to establish negative pressure;
s4, detecting the pump pressure stability of the zero injection quantity: after pressure building is successful, the stability of the pump pressure under the requirement of zero injection amount can be verified through data such as the pressure value in the pump;
s5, automatic detection of different injection quantities: the upper computer software automatically controls the test system to operate under corresponding working conditions according to the configured injection amount test requirement, controls the nozzle system to open the valve to perform injection, verifies the stability of the pump pressure through the pressure value in the pump, and simultaneously verifies whether the injection amount is consistent with the requirement through the weighing meter;
s6, detecting the pumping back function: the upper computer simulates a pumping-back command sent to the urea pump and detects whether the qualification of the pumping-back function is verified through the pressure value in the pump within the specified time;
s7, data storage: after the product function test is completed, the test data is automatically stored in the database so as to facilitate the analysis and the tracing of the test data.
As a preferred technical solution of the method for testing a function of a urea pump according to the present invention, in S2, the self-test diagnosis includes a protocol standard of the urea pump, a sensor and a motor in the pump, a sensor related to the test system, and an electromagnetic valve.
As a preferred technical solution of the method for testing the function of the urea pump, in S3, after the negative pressure is established, the opening of the electromagnetic valve is controlled to detect whether the pump has the capability of establishing the pump pressure.
Compared with the prior art, the invention has the beneficial effects that:
1. the test system has high precision and can perform milliliter-level high-precision test.
2. The automation degree is high, and after the test parameters are configured, the function test under various working conditions can be automatically completed, so that the test efficiency is effectively improved.
3. The method has expansibility and can adapt to function tests under various standard protocols.
4. The test cost is low, the liquid urea used in the test process can be recycled, and all sensors used in the test can adopt universal sensors.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1;
FIG. 1 is a flow chart of the present invention;
a urea pump function test system comprises a PC upper computer, a control circuit board, a nozzle system, a urea pump system, a urea tank, a pressure sensor, an electromagnetic valve and a bar code gun;
wherein:
the bar code gun is in signal connection with the PC upper computer and is used for controlling and recording a label of the urea pump and recording test data of a product for database management;
the PC upper computer is connected with the control circuit board through a CAN signal, the control circuit board converts a request instruction of the PC upper computer into a physical signal to control the urea pump system, the nozzle system and the electromagnetic valve, and simultaneously acquires a related parameter physical signal, converts the related parameter physical signal into a CAN signal and feeds back the CAN signal to the PC upper computer;
the PC upper computer is in signal connection with the pressure sensor and is used for collecting data of the weighing meter.
Further, the method comprises the following steps:
the invention also provides a method for the function test system of the urea pump, which comprises the following steps:
s1, installing a product to be tested: scanning a code by a bar code gun, and establishing database information of a test product;
s2, running PC upper computer software: carrying out self-checking diagnosis;
s3, pressure build stage diagnosis: firstly, controlling the closing (normally open) of an electromagnetic valve and the rotating speed of a motor to prevent urea from entering a pump from a liquid inlet tank of a urea tank to establish negative pressure;
s4, detecting the pump pressure stability of the zero injection quantity: after pressure building is successful, the stability of the pump pressure under the requirement of zero injection amount can be verified through data such as the pressure value in the pump;
s5, automatic detection of different injection quantities: the upper computer software automatically controls the test system to operate under corresponding working conditions according to the configured injection amount test requirement, controls the nozzle system to open the valve to perform injection, verifies the stability of the pump pressure through the pressure value in the pump, and simultaneously verifies whether the injection amount is consistent with the requirement through the weighing meter;
s6, detecting the pumping back function: the upper computer simulates a pumping-back command sent to the urea pump and detects whether the qualification of the pumping-back function is verified through the pressure value in the pump within the specified time;
s7, data storage: after the product function test is completed, the test data is automatically stored in the database so as to facilitate the analysis and the tracing of the test data.
In an alternative embodiment: in S2, the self-test diagnosis includes protocol standards of the urea pump, sensors and motors in the pump, sensors related to the test system, and solenoid valves.
In an alternative embodiment: in S3, the control of the opening of the solenoid valve after the negative pressure is established detects whether the pump has the capability of establishing the pump pressure.
Further, the method comprises the following steps:
the invention relates to a function test system of a urea pump, which aims at a key part of automobile exhaust emission. The urea pump has the main function of accurately controlling the rotating speed of a motor of the urea pump according to an ECU instruction, so that the pressure in the pressure stabilizing cavity is stabilized at about 9 Bar. The ECU, the urea pump and the nozzle form a closed loop system, and the pressure stabilization of the pressure stabilizing cavity is the most critical loop of the precision of the system.
Aiming at the functional test requirements, the invention designs a set of automatic test system capable of completing the urea pump under different injection quantity requirements. The test system can be configured with different injection quantity test requirements, and after the product is installed, the function test of the related product can be completed within a specified time by running the upper computer software; the test system has a self-checking function, and can accurately and effectively verify the qualification of the product; meanwhile, the test system has expansibility and can verify the functions of the urea pumps under different standards (national fourth, national fifth and national sixth).
The function test system of the urea pump is a set of closed-loop control system and mainly comprises a PC upper computer, a control circuit board, a nozzle system, a urea pump system (product to be tested), a urea tank, a sensor, an electromagnetic valve, a bar code gun and the like. The bar code gun records the label of the urea pump through the upper computer control so as to record the test data of the product for database management. The upper computer communicates with the control circuit board through a Controller Area Network (CAN), the control circuit board converts a request instruction of the upper computer into a physical signal to control the urea pump system, the nozzle system and the electromagnetic valve, and simultaneously acquires a related parameter physical signal, converts the related parameter physical signal into a CAN signal and feeds the CAN signal back to the upper computer. The upper computer directly collects data of sensors such as the weighing meter and the like, and the data are used as important parameter indexes for judging whether the product is qualified or not.
The invention has the following remarkable advantages:
1. the test system has high precision and can perform milliliter-level high-precision test;
2. the automation degree is high, and after test parameters are configured, functional tests under various working conditions can be automatically completed, so that the test efficiency is effectively improved;
3. the method has expansibility, and can be suitable for function tests under various standard protocols;
4. the test cost is low, the liquid urea used in the test process can be recycled, and all sensors used in the test can adopt universal sensors.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A urea pump functional test system which characterized in that: the device comprises a PC upper computer, a control circuit board, a nozzle system, a urea pump system, a urea tank, a pressure sensor, an electromagnetic valve and a bar code gun;
wherein:
the bar code gun is in signal connection with the PC upper computer and is used for controlling and recording a label of the urea pump and recording test data of a product for database management;
the PC upper computer is connected with the control circuit board through a CAN signal, the control circuit board converts a request instruction of the PC upper computer into a physical signal to control the urea pump system, the nozzle system and the electromagnetic valve, and simultaneously acquires a related parameter physical signal, converts the related parameter physical signal into a CAN signal and feeds back the CAN signal to the PC upper computer;
the PC upper computer is in signal connection with the pressure sensor and is used for collecting data of the weighing meter.
2. A method of testing a system for urea pump functionality according to claim 1, wherein: the method comprises the following steps:
s1, installing a product to be tested: scanning a code by a bar code gun, and establishing database information of a test product;
s2, running PC upper computer software: carrying out self-checking diagnosis;
s3, pressure build stage diagnosis: firstly, controlling the closing (normally open) of an electromagnetic valve and the rotating speed of a motor to prevent urea from entering a pump from a liquid inlet tank of a urea tank to establish negative pressure;
s4, detecting the pump pressure stability of the zero injection quantity: after pressure building is successful, the stability of the pump pressure under the requirement of zero injection amount can be verified through data such as the pressure value in the pump;
s5, automatic detection of different injection quantities: the upper computer software automatically controls the test system to operate under corresponding working conditions according to the configured injection amount test requirement, controls the nozzle system to open the valve to perform injection, verifies the stability of the pump pressure through the pressure value in the pump, and simultaneously verifies whether the injection amount is consistent with the requirement through the weighing meter;
s6, detecting the pumping back function: the upper computer simulates a pumping-back command sent to the urea pump and detects whether the qualification of the pumping-back function is verified through the pressure value in the pump within the specified time;
s7, data storage: after the product function test is completed, the test data is automatically stored in the database so as to facilitate the analysis and the tracing of the test data.
3. A urea pump functional test system according to claim 1, characterized in that: in S2, the self-test diagnosis includes protocol standards of the urea pump, sensors and motors in the pump, sensors related to the test system, and solenoid valves.
4. A urea pump functional test system according to claim 1, characterized in that: in S3, the control of the opening of the solenoid valve after the negative pressure is established detects whether the pump has the capability of establishing the pump pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002224.5A CN112761933A (en) | 2019-10-21 | 2019-10-21 | Urea pump function testing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002224.5A CN112761933A (en) | 2019-10-21 | 2019-10-21 | Urea pump function testing system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112761933A true CN112761933A (en) | 2021-05-07 |
Family
ID=75691760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911002224.5A Pending CN112761933A (en) | 2019-10-21 | 2019-10-21 | Urea pump function testing system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112761933A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010163886A (en) * | 2009-01-13 | 2010-07-29 | Toyota Motor Corp | Urea water injection control device for exhaust emission control device |
| CN204572417U (en) * | 2015-04-09 | 2015-08-19 | 淄博拓达机械设备有限责任公司 | Urea pump test bench |
| CN105422231A (en) * | 2016-01-05 | 2016-03-23 | 山东大学 | Offline multi-station universal SCR system endurance test device and method |
| CN107178493A (en) * | 2017-06-22 | 2017-09-19 | 北京雄信息科技有限公司 | A kind of urea pump detecting system |
| CN108051224A (en) * | 2017-10-19 | 2018-05-18 | 潍柴动力股份有限公司 | SCR system test device |
| CN108982951A (en) * | 2018-08-09 | 2018-12-11 | 上海爱乐石油设备制造有限公司 | A kind of equipment of automatically testing urea pump performance |
| CN208984695U (en) * | 2018-08-09 | 2019-06-14 | 上海爱乐石油设备制造有限公司 | A kind of equipment of automatically testing urea pump performance |
| CN110118115A (en) * | 2019-05-28 | 2019-08-13 | 苏州卡布斯精工科技有限公司 | A kind of urea pump detection prosthetic device and detection restorative procedure |
-
2019
- 2019-10-21 CN CN201911002224.5A patent/CN112761933A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010163886A (en) * | 2009-01-13 | 2010-07-29 | Toyota Motor Corp | Urea water injection control device for exhaust emission control device |
| CN204572417U (en) * | 2015-04-09 | 2015-08-19 | 淄博拓达机械设备有限责任公司 | Urea pump test bench |
| CN105422231A (en) * | 2016-01-05 | 2016-03-23 | 山东大学 | Offline multi-station universal SCR system endurance test device and method |
| CN107178493A (en) * | 2017-06-22 | 2017-09-19 | 北京雄信息科技有限公司 | A kind of urea pump detecting system |
| CN108051224A (en) * | 2017-10-19 | 2018-05-18 | 潍柴动力股份有限公司 | SCR system test device |
| CN108982951A (en) * | 2018-08-09 | 2018-12-11 | 上海爱乐石油设备制造有限公司 | A kind of equipment of automatically testing urea pump performance |
| CN208984695U (en) * | 2018-08-09 | 2019-06-14 | 上海爱乐石油设备制造有限公司 | A kind of equipment of automatically testing urea pump performance |
| CN110118115A (en) * | 2019-05-28 | 2019-08-13 | 苏州卡布斯精工科技有限公司 | A kind of urea pump detection prosthetic device and detection restorative procedure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109765876B (en) | Simulation test method for OBD function of diesel engine aftertreatment system | |
| JP4319461B2 (en) | NOx emission control system using virtual sensor | |
| CN101435741B (en) | Process for the determination of the correct fuel flow rate to a vehicle engine for carrying out diagnostic tests | |
| US5781871A (en) | Method of determining diagnostic threshold values for a particular motor vehicle type and electronic computing unit for a motor vehicle | |
| US8725391B2 (en) | Method for identifying an error function and in particular a drift of a rail pressure sensor in a common rail injection system | |
| CN101263291B (en) | Method and device for monitoring a fuel metering system | |
| US20100185379A1 (en) | Method and device for operating an internal combustion engine | |
| CN104089777A (en) | Engine pedestal automatic calibration system | |
| CN102645340B (en) | Automobile radiator pressure pulse test platform | |
| CN105511453A (en) | Service aid for SCR (Selective Catalytic Reduction) post-processing system | |
| CN106528240A (en) | ECU application program write-in method and system | |
| CN112394282B (en) | Carbon tank electromagnetic valve diagnosis method, device, equipment and storage medium | |
| CN110848003A (en) | Air-assisted SCR urea consumption low-fault simulation device and method | |
| JPH10221198A (en) | Method and equipment for recognition of leakage | |
| CN205135807U (en) | Fuel tank evaporation discharge system equipment | |
| CN112761933A (en) | Urea pump function testing system and method | |
| CN108979648B (en) | A kind of shield machine segment ring number calculation method | |
| US20100057326A1 (en) | Fuel Injection Amount Learning Control Method | |
| CN114688926A (en) | Carrier rocket health detection verification evaluation system and method | |
| CN111665739A (en) | National six diesel engine digital calibration system | |
| US20230100963A1 (en) | Method for determining a characteristic variable of a solenoid valve and method for training a pattern recognition method based on artificial intelligence | |
| CN112824677A (en) | System and method for testing performance of urea pump | |
| Benajes et al. | ADVANCED METHODOLOGY FOR IMPROVING TESTING EFFICIENCY IN A SINGLE-CYLINDER RESEARCH DIESEL ENGINE. | |
| KR102314800B1 (en) | Apparatus for evaluation of bop system of fuel cell | |
| CN108956061A (en) | A kind of battery case air-tightness intelligent checking system and its detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 201899 Room 101, No. 12, Lane 1661, Jialuo Road, Jiading District, Shanghai JT2055 Applicant after: Shanghai Qijian Software Technology Co.,Ltd. Address before: No. 172, Hongshan Road, Pudong New Area, Shanghai, 200120 Applicant before: Shanghai Qijian Software Technology Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |