CN109763882B - Urea tank diagnostic system - Google Patents
Urea tank diagnostic system Download PDFInfo
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- CN109763882B CN109763882B CN201811163719.1A CN201811163719A CN109763882B CN 109763882 B CN109763882 B CN 109763882B CN 201811163719 A CN201811163719 A CN 201811163719A CN 109763882 B CN109763882 B CN 109763882B
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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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- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a urea tank diagnosis system, which comprises an aftertreatment system controller ACU, an electric control unit box E-box and a computer, wherein the ACU is connected with the computer; a urea tank diagnosis control system is installed on the computer; the urea tank diagnosis control system comprises a safety access unit, an override test function unit, a fault clearing function unit, a real-time monitoring unit, a controller signal overtime check function unit, a simulation controller function unit and a data analysis function unit; the real-time monitoring unit comprises a controller static information reading module, an ACU signal reading module, an ECU signal reading module, an E-box signal reading module and an instrument signal reading module. The invention has reasonable concept, stable operation and use, good diagnosis effect and high efficiency, and can read the current state of the post-processing system by the personnel after sale and sale, clear the current fault, execute override test and provide a diagnosis tool for the work after sale and sale.
Description
Technical Field
The invention relates to the technical field of fault diagnosis of aftertreatment systems, in particular to a urea tank diagnosis system.
Background
The traditional urea tank diagnostic instrument is easy to fail when passing safe access, so that a controller is locked, and after-sales personnel and time-of-sale personnel of a company cannot read the current state of an after-treatment system, cannot clear the current faults, cannot execute an override test, and seriously influences the diagnostic efficiency and the diagnostic effect of the urea tank.
Disclosure of Invention
The invention provides a urea tank diagnosis system which has the advantages of reasonable concept, stable operation and use, good diagnosis effect and high efficiency, can read the current state of an after-treatment system by the time-of-sale and after-sale personnel, can clear the current fault, can execute the override test and provides a diagnosis tool for the time-of-sale and after-sale work, and aims to solve the problems that the controller is locked, the time-of-sale and after-sale personnel cannot read the current state of the after-treatment system, cannot clear the current fault and cannot execute the override test due to the fact that the traditional urea tank diagnosis instrument is easy to fail when being safely accessed.
The technical scheme of the invention is as follows:
the urea tank diagnosis system comprises an aftertreatment system controller ACU and an electric control unit box E-box electrically connected with the aftertreatment system controller ACU; the diagnosis system also comprises a computer which is respectively and electrically connected with the post-processing system controller ACU and the electric control unit box E-box;
a urea tank diagnosis control system is installed on the computer; the urea tank diagnosis control system comprises a safety access unit, an override test function unit, a fault clearing function unit, a real-time monitoring unit, a controller signal overtime check function unit, a simulation controller function unit and a data analysis function unit;
the safety access function unit is used for obtaining a safety access right before the advanced diagnosis function of the ACU of the post-processing system controller takes effect;
the override test function unit is activated after the safety algorithm is passed, and is used for forcibly controlling all actuators and realizing timing control;
the fault clearing functional unit is activated after the safety algorithm is passed, and is used for forcibly clearing all faults in the post-processing system controller ACU and the electric control unit box E-box;
the real-time monitoring unit comprises a controller static information reading module, an ACU signal reading module, an ECU signal reading module, an E-box signal reading module and an instrument signal reading module; the controller static information reading module is used for reading the ACU information of the post-processing system controller; the ACU signal reading module is used for acquiring information from a post-processing system and providing data support for fault diagnosis; the ECU signal reading module is used for acquiring the monitoring quantity from an engine control unit ECU and providing data support for fault diagnosis; the E-box signal reading module is used for acquiring the monitoring quantity from the electronic control unit box E-box and providing data support for fault diagnosis; the instrument signal reading module is used for acquiring the monitored quantity from the instrument and providing data support for fault diagnosis;
the controller signal overtime checking functional unit is used for checking whether the controller is on line or not so as to quickly judge the connection and working state of the controller and check the reason of communication faults;
the simulation controller functional unit is used for simulating controller messages on a CAN line to achieve the purpose of virtual signals and support the simulation of all controllers related to a system;
the data analysis functional unit is used for carrying out statistical analysis on data acquired by road and bench tests.
The urea tank diagnostic system, wherein: the diagnostic system also comprises a reset unit and a fault code query unit; the reset unit comprises a reset ACU module and a reset E-box module; and the fault code query unit is used for querying the fault description according to the fault code.
The urea tank diagnostic system, wherein: the actuator used for forced control by the override test function unit comprises a control pump, an injection quantity, an air valve opening, a water valve switch and an electric heating pipe switch; the override test function may set a time to control the operation of the actuator.
The urea tank diagnostic system, wherein: the post-processing system controller ACU information read by the controller static information reading module specifically comprises a serial number, a hardware version, a software version, a calibration data version, working time and power-on times.
The urea tank diagnostic system, wherein: the signal readable by the ACU signal reading module comprises current fault of an ACU of the post-processing system controller, historical fault of the ACU of the post-processing system controller, ambient temperature, inlet temperature of a catalyst, outlet temperature of the catalyst, urea liquid level, temperature of a urea tank, urea temperature, NOx concentration, system state, injection amount, air valve opening, urea pressure, average pressure of urea, compressed air pressure, accumulated urea consumption, supply voltage of the ACU of the post-processing system controller, voltage of a urea temperature sensor, voltage of a urea pressure sensor, voltage of a urea liquid level sensor, voltage of a urea tank temperature sensor, voltage of an air pressure sensor, voltage of an inlet temperature sensor, voltage of an outlet temperature sensor and injection release state.
The urea tank diagnostic system, wherein: the signals readable by the ECU signal reading module include engine speed, engine torque, coolant temperature, exhaust flow, barometric pressure, intake pressure, and intake temperature.
The urea tank diagnostic system, wherein: the signals readable by the E-box signal reading module include TSC1 torque limit request status and TSC1 torque limit request percentage.
The urea tank diagnostic system, wherein: the signals readable by the meter signal reading module comprise vehicle speed and accumulated mileage.
The urea tank diagnostic system, wherein: the post-processing system controller ACU and the electric control unit box E-box are electrically connected with a 16pin connector of the whole vehicle through a wire harness; the post-processing system controller ACU is also respectively and electrically connected with an air electromagnetic valve, a cooling water valve and a pipeline heating device which are arranged on a vehicle, and a urea tank liquid level temperature sensor, an air pressure sensor and a urea temperature pressure sensor which are arranged on a urea tank; and the electronic control unit box E-box is also electrically connected with a NOx sensor arranged on the urea tank.
Has the advantages that:
the urea tank diagnosis control system is software for diagnosing the fault of the post-processing system, has the main functions of real-time monitoring, fault reading and clearing and override test, and is connected with the computer to the post-processing system controller ACU when the post-processing system needs to be diagnosed or tested, and then executes the diagnosis or test function. Meanwhile, the urea tank diagnosis control system installed on the computer can realize real-time monitoring, fault reading and clearing and override test, can solve the problems that a company lacks a diagnosis tool for time and after sale, cannot read the current state of the after-treatment system, cannot clear the current fault and cannot execute the override test, provides a diagnosis tool for time and after sale work, has a simple and efficient operation interface compared with other diagnosis tools, is easy for a user to use, has high success rate of a safety algorithm, and is not easy to cause the locking of an ACU (adaptive control Unit) of the after-treatment system due to the failure of the safety algorithm.
Drawings
FIG. 1 is a schematic block diagram of the connection of the urea tank diagnostic system of the present invention;
FIG. 2 is a tree diagram of the configuration of a urea tank diagnostic control system installed on a computer in the urea tank diagnostic system of the present invention;
FIG. 3 is a tree diagram of the configuration of the real-time monitoring unit of the urea tank diagnostic control system installed on a computer in the urea tank diagnostic system of the present invention;
FIG. 4 is a tree diagram of the configuration of the reset unit of the urea tank diagnostic control system installed on a computer in the urea tank diagnostic system of the present invention;
FIG. 5 is a wiring diagram of the post-processing system controller ACU, the electronic control unit box E-box and the 16pin connector of the whole vehicle of the urea tank diagnostic system of the present invention.
Detailed Description
As shown in FIG. 1, the urea tank diagnostic system of the present invention comprises a computer, a processing system controller ACU and an electronic control unit box E-box.
The computer is provided with a urea tank diagnosis control system which is arranged on the computer and electrically connected with the post-processing system controller ACU through the computer to realize the diagnosis or test function.
As shown in fig. 2 to 4, the urea tank diagnostic control system includes a safety access unit 1, an override test function unit 2, a fault clearing function unit 3, a real-time monitoring unit 4, a controller signal timeout checking function unit 5, an analog controller function unit 6, a data analysis function unit 7, a reset unit 8, and a fault code inquiry unit 9.
The secure access functional unit 1 obtains secure access before the advanced diagnostic function of the post-processing system controller ACU is enabled. In order to prevent brute force from cracking the post-processing system controller ACU, the post-processing system controller ACU strictly limits the security access function, and the post-processing system controller ACU is triggered to be locked once every 4 times of continuous security access failure; locking for the first time for 1 minute, locking for the second time for 1 hour, and locking for the third time for 24 hours, wherein the safety access function is invalid; the urea tank diagnosis system has high success rate of safe access, and generally cannot trigger locking; when the safe access fails, the urea tank diagnosis system can automatically reset the post-processing system controller ACU, so that the post-processing system controller ACU is prevented from being locked due to the continuous safe access failure.
The override test function unit 2 is activated after the safety algorithm is passed, is used for forcibly controlling all actuators, including controlling the injection quantity of a pump, the opening degree of an air valve, a water valve switch, an electric heating pipe switch and the like, can realize timing control, and can set time to control the actuators to work.
The fault clearing function unit 3 is activated after the safety algorithm is passed, and is used for forcibly clearing all faults in the controllers, including the post-processing system controller ACU and the electronic control unit box E-box, including the current fault and the historical fault, and clearing the over-temperature fault.
The real-time monitoring unit 4 includes a controller static information reading module 41, an ACU signal reading module 42, an ECU signal reading module 43, an E-box signal reading module 44, and a meter signal reading module 45.
The controller static information reading module 41 is configured to read ACU information of the post-processing system controller, which specifically includes a serial number, a hardware version, a software version, a calibration data version, a working time, and a power-on frequency.
The ACU signal reading module 42 is used for acquiring information such as fault information, sensor measurement values, system states, injection release states and the like from the post-processing system, and providing data support for fault diagnosis; the signal readable by the ACU signal reading module 42 includes a current fault of an ACU of an aftertreatment system controller, a historical fault of the ACU of the aftertreatment system controller, an ambient temperature, a catalyst inlet temperature, a catalyst outlet temperature, a urea liquid level, a urea tank temperature, a urea temperature, a NOx concentration, a system state, an injection amount, a gas valve opening degree, a urea pressure, a urea average pressure, a compressed air pressure, an accumulated urea consumption amount, an ACU supply voltage of the aftertreatment system controller, a urea temperature sensor voltage, a urea pressure sensor voltage, a urea liquid level sensor voltage, a urea tank temperature sensor voltage, an air pressure sensor voltage, an inlet temperature sensor voltage, an outlet temperature sensor voltage, and an injection release state.
The ECU signal reading module 43 is used for acquiring the monitoring quantity from the engine electronic control unit ECU and providing data support for fault diagnosis; the ECU signal reading module 43 can read signals including engine speed, engine torque, coolant temperature, exhaust flow rate, barometric pressure, intake pressure, and intake temperature.
The E-box signal reading module 44 is used for acquiring the monitoring quantity from the electronic control unit box E-box and providing data support for fault diagnosis; the signals readable by the E-box signal reading module 44 include TSC1 torque limit request status and TSC1 torque limit request percentage.
The instrument signal reading module 45 is used for acquiring the monitored quantity from the instrument and providing data support for fault diagnosis; the signals readable by the meter signal reading module 45 include vehicle speed and accumulated mileage.
The controller signal timeout checking functional unit 5 is used for checking whether the controller is on-line or not, and the controller signal timeout checking functional unit 5 can quickly judge the connection and working state of the controller and check the reason of communication faults. After power-on, if the post-processing system controller ACU works, the urea tank diagnosis system can detect related signals, the state is 'online', otherwise, the state is 'offline', and a state bar at the lowest part of software displays whether all controllers are online in real time, as shown in the figure.
The simulation controller function unit 6 is used for simulating a controller message on a CAN line to achieve the purpose of a virtual signal, and supports the simulation of all controllers (an aftertreatment system controller ACU, an engine control unit ECU, an instrument, and a NOx sensor) related to a system. By checking the check boxes as shown in the figure, the corresponding controllers can be simulated; after the controller needing simulation is selected, the read-only text box on the left side is switched to the writable text box, and meanwhile, the acquisition of relevant controller signals is stopped, and signals input by a user are sent to the CAN line connected currently.
The data analysis functional unit 7 is used for carrying out statistical analysis on data acquired by road and bench tests; the D310/D320 project is supported at present, and the data recorded by the CANape can be recorded and analyzed by the diagnostic instrument in the future. After a day of road testing (or one bench test cycle) is completed, the following information in the data can be counted with the data analysis function.
The reset unit 8 includes a reset ACU module 81 and a reset E-box module 82; the reset ACU module 81 functions to return the operation state of the post-processing system controller ACU to the initial state, which is equivalent to re-powering on the post-processing system controller ACU; the function of the reset E-box module 82 is to return the operation state of the ecu box E-box to the initial state, which is equivalent to powering up the ecu box E-box again.
The fault code query unit 9 is configured to query the fault description according to the fault code.
As shown in fig. 5, the post-processing system controller ACU is electrically connected with the computer, the electronic control unit box E-box and the 16pin connector of the whole vehicle through a wire harness; the post-processing system controller ACU is also electrically connected with an air electromagnetic valve, a cooling water valve and a pipeline heating device which are arranged on the vehicle, and a urea tank liquid level temperature sensor, an air pressure sensor and a urea temperature pressure sensor which are arranged on the urea tank.
The electronic control unit box E-box is also electrically connected with the 16pin connector of the whole vehicle through a wire harness; wherein the electronic control unit box E-box is also electrically connected with a NOx sensor arranged on the urea tank.
The urea tank diagnosis system has reasonable concept, stable operation and use, high diagnosis efficiency and good effect, particularly the urea tank diagnosis control system can realize real-time monitoring, fault reading and clearing and override test, provides diagnosis tools for time-sale and after-sale work, has simple and efficient operation interface, is easy for users to use, has high success rate of safety algorithm and is not easy to cause the locking of an ACU (adaptive control Unit) of an after-treatment system due to the failure of the safety algorithm compared with other diagnosis tools.
Claims (9)
1. A urea tank diagnosis system comprises an aftertreatment system controller ACU and an electronic control unit box E-box electrically connected with the aftertreatment system controller ACU; the method is characterized in that: the diagnosis system also comprises a computer which is respectively and electrically connected with the post-processing system controller ACU and the electric control unit box E-box;
a urea tank diagnosis control system is installed on the computer; the urea tank diagnosis control system comprises a safety access unit, an override test function unit, a fault clearing function unit, a real-time monitoring unit, a controller signal overtime check function unit, a simulation controller function unit and a data analysis function unit;
the safety access function unit is used for obtaining a safety access right before the advanced diagnosis function of the ACU of the post-processing system controller takes effect;
the override test function unit is activated after the safety algorithm is passed, and is used for forcibly controlling all actuators and realizing timing control; the actuator comprises a control pump, an air valve opening, a water valve switch and an electric heating pipe switch;
the fault clearing functional unit is activated after the safety algorithm is passed, and is used for forcibly clearing all faults in the post-processing system controller ACU and the electric control unit box E-box;
the real-time monitoring unit comprises a controller static information reading module, an ACU signal reading module, an ECU signal reading module, an E-box signal reading module and an instrument signal reading module; the controller static information reading module is used for reading the ACU information of the post-processing system controller; the ACU signal reading module is used for acquiring information from a post-processing system and providing data support for fault diagnosis; the ECU signal reading module is used for acquiring the monitoring quantity from an engine control unit ECU and providing data support for fault diagnosis; the E-box signal reading module is used for acquiring the monitoring quantity from the electronic control unit box E-box and providing data support for fault diagnosis; the instrument signal reading module is used for acquiring the monitored quantity from the instrument and providing data support for fault diagnosis;
the controller signal overtime checking functional unit is used for checking whether the controller is on line or not so as to quickly judge the connection and working state of the controller and check the reason of communication faults;
the simulation controller functional unit is used for simulating controller messages on a CAN line to achieve the purpose of virtual signals and support the simulation of all controllers related to a system;
the data analysis functional unit is used for carrying out statistical analysis on data acquired by road and bench tests.
2. The urea tank diagnostic system of claim 1, wherein: the diagnostic system also comprises a reset unit and a fault code query unit; the reset unit comprises a reset ACU module and a reset E-box module; and the fault code query unit is used for querying the fault description according to the fault code.
3. The urea tank diagnostic system of claim 1, wherein: the actuator used for forced control by the override test function unit comprises a control pump, an injection quantity, an air valve opening, a water valve switch and an electric heating pipe switch; the override test function may set a time to control the operation of the actuator.
4. The urea tank diagnostic system of claim 1, wherein: the post-processing system controller ACU information read by the controller static information reading module specifically comprises a serial number, a hardware version, a software version, a calibration data version, working time and power-on times.
5. The urea tank diagnostic system of claim 1, wherein: the signal readable by the ACU signal reading module comprises current fault of an ACU of the post-processing system controller, historical fault of the ACU of the post-processing system controller, ambient temperature, inlet temperature of a catalyst, outlet temperature of the catalyst, urea liquid level, temperature of a urea tank, urea temperature, NOx concentration, system state, injection amount, air valve opening, urea pressure, average pressure of urea, compressed air pressure, accumulated urea consumption, supply voltage of the ACU of the post-processing system controller, voltage of a urea temperature sensor, voltage of a urea pressure sensor, voltage of a urea liquid level sensor, voltage of a urea tank temperature sensor, voltage of an air pressure sensor, voltage of an inlet temperature sensor, voltage of an outlet temperature sensor and injection release state.
6. The urea tank diagnostic system of claim 1, wherein: the signals readable by the ECU signal reading module include engine speed, engine torque, coolant temperature, exhaust flow, barometric pressure, intake pressure, and intake temperature.
7. The urea tank diagnostic system of claim 1, wherein: the signals readable by the E-box signal reading module include TSC1 torque limit request status and TSC1 torque limit request percentage.
8. The urea tank diagnostic system of claim 1, wherein: the signals readable by the meter signal reading module comprise vehicle speed and accumulated mileage.
9. The urea tank diagnostic system of claim 1, wherein: the post-processing system controller ACU and the electric control unit box E-box are electrically connected with a 16pin connector of the whole vehicle through a wire harness;
the post-processing system controller ACU is also respectively and electrically connected with an air electromagnetic valve, a cooling water valve and a pipeline heating device which are arranged on a vehicle, and a urea tank liquid level temperature sensor, an air pressure sensor and a urea temperature pressure sensor which are arranged on a urea tank;
and the electronic control unit box E-box is also electrically connected with a NOx sensor arranged on the urea tank.
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| CN201811163719.1A CN109763882B (en) | 2018-10-02 | 2018-10-02 | Urea tank diagnostic system |
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| CN110805483B (en) * | 2019-11-15 | 2021-07-09 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea consumption low fault diagnosis method |
| CN111425281B (en) * | 2020-04-01 | 2021-02-05 | 北京理工新源信息科技有限公司 | Diesel vehicle refueling or urea adding behavior detection method and system |
| CN111963287B (en) * | 2020-08-21 | 2022-04-29 | 中国重汽集团济南动力有限公司 | OBD interaction system, method and device for vehicle engine and post-processing |
| CN112196641A (en) * | 2020-10-10 | 2021-01-08 | 上海星融汽车科技有限公司 | Prediction prompting method for driving range of vehicle urea solution |
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| DE102004044825A1 (en) * | 2004-09-16 | 2006-03-23 | Deutz Ag | Monitoring method for sealing of exhaust gas of internal combustion engine involves using sensor, which detects specific parameters of reducing agent and in case of deviation initiation of signal takes place |
| KR100996116B1 (en) * | 2008-09-29 | 2010-11-24 | 쌍용자동차 주식회사 | Volume optimization system of urea tank for diesel and gasoline automobile |
| US8171720B2 (en) * | 2008-10-06 | 2012-05-08 | GM Global Technology Operations LLC | System and methods to detect non-urea reductant filled in a urea tank |
| CN204175394U (en) * | 2014-09-26 | 2015-02-25 | 张英志 | A kind of device for monitoring running of motor-vehicle tail-gas after-treatment device and Motor Vehicle |
| CN106640305A (en) * | 2016-09-23 | 2017-05-10 | 武汉理工大学 | Monitoring system and method for vehicle emission control aftertreatment device |
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