CN103147830A - Selective catalytic reduction (SCR) tail-gas after-treatment system fault diagnosis instrument - Google Patents

Selective catalytic reduction (SCR) tail-gas after-treatment system fault diagnosis instrument Download PDF

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Publication number
CN103147830A
CN103147830A CN2013101012069A CN201310101206A CN103147830A CN 103147830 A CN103147830 A CN 103147830A CN 2013101012069 A CN2013101012069 A CN 2013101012069A CN 201310101206 A CN201310101206 A CN 201310101206A CN 103147830 A CN103147830 A CN 103147830A
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exhaust gas
aftertreatment system
gas aftertreatment
scr exhaust
micro
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CN103147830B (en
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臧志成
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WUXI KAILONG BUS EQUIPMENT MANUFACTURING Co Ltd
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WUXI KAILONG BUS EQUIPMENT MANUFACTURING Co Ltd
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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

Abstract

The invention discloses a selective catalytic reduction (SCR) tail-gas after-treatment system fault diagnosis instrument, which comprises a controller network (CAN) communication module, a microcontrol unit, a storage device, a display screen, a keyboard and a power supply. The CAN communication module is electrically connected with an SCR tail-gas after-treatment system and an engine. The microcontrol unit is electrically connected with the CAN communication module and the display screen. The storage device is electrically connected with the microcontrol unit, and the keyboard is electrically connected with the microcontrol unit. The power supply is electrically connected with the microcontrol unit. Due to the adoption of the SCR tail-gas after-treatment system fault diagnosis instrument, the fault of the SCR tail-gas after-treatment system can be accurately judged, the fault finding time can be shortened, and convenience in use and carrying also can be realized.

Description

A kind of SCR exhaust gas aftertreatment system failure diagnostic apparatus
Technical field
The present invention relates to SCR exhaust aftertreatment technical field, relate in particular to a kind of SCR exhaust gas aftertreatment system failure diagnostic apparatus.
Background technique
Along with the develop rapidly of China's economic with science and technology, the automobile industry development of China goes from strength to strength.The growth of automobile quantity has improved the people's quality of life greatly, but the associated energy, environmental problem display gradually.On the one hand, along with the increase of automobile quantity, the consumption of the fossil fuels such as oil also increases fast, and constantly breaks through the international petroleum safe-guard line; On the other hand, the environmental pollution pressure that motor vehicle exhaust emission causes China to face is increasingly serious, and motor vehicle exhaust emission has become the primary pollution source of urban environment.In view of China increasingly serious environmental protection and Pressure on Energy, country requires more and more stricter to motor vehicle exhaust emission.
Manufacturers of engines is that selective catalytic reduction (Selective Catalytic Reduction, SCR) catalyzer comes the nitrogen oxide in purifying engine tail gas stream for satisfied regulation about exhaust emissions adopts a kind of method.The SCR exhaust gas aftertreatment system is the system that the subjects such as a cover collection machinery, electronics, chemistry and fluid combine, it is in the situation that there is catalyzer, discharge the reducing agents such as ammonia (NH3) in the engines tail air-flow, ammonia can be stored on the cover coat of catalyzer, the product of the reaction of nitrogen oxides generation environmental sound in this place ammonia and tail gas stream is such as the nitrogen G﹠W etc.
But, serious problems that exist at present are: in the SCR exhaust gas aftertreatment system system for example urea-spray system jams that breaks down, during the faults such as urea performance escape, maintenance difficulty is large, be difficult to get rid of by traditional experience way or instrument, finally cause the exhaust emissions of automobile to surpass laws and regulations requirement.
Summary of the invention
For above-mentioned technical problem, the object of the present invention is to provide a kind of SCR exhaust gas aftertreatment system failure diagnostic apparatus, it has effectively solved the SCR exhaust gas aftertreatment system and has in a single day broken down and can't judge fast the problem of fault point, and easy to use, is easy to carry.
For reaching this purpose, the present invention by the following technical solutions:
A kind of SCR exhaust gas aftertreatment system failure diagnostic apparatus, it comprises: controller local area network (Controller Area Network, CAN) communication module, micro-control unit (Micro Control Unit, MCU), storage, display screen, keyboard and power supply;
Described CAN communication module is electrically connected to SCR exhaust gas aftertreatment system, motor, is used for obtaining the fault message of each sensor feedback of SCR exhaust gas aftertreatment system and the status information of motor;
Described micro-control unit is electrically connected to CAN communication module, display screen, be used for the status information of described fault message and motor is analyzed, judge the Operational Limits of parameter, state, fault point and the motor of each parts in the SCR exhaust gas aftertreatment system, and export to the display screen demonstration;
Described storage is electrically connected to micro-control unit, for the Operational Limits of parameter, state, fault point and the motor of storing described each parts of SCR exhaust gas aftertreatment system;
Described keyboard is electrically connected to micro-control unit, is used for the input related control data, realizes reading of parameter and fault, and is shown on display screen;
Described power supply is electrically connected to micro-control unit, is used to this failure diagnostic apparatus power supply.
Especially, described SCR exhaust gas aftertreatment system failure diagnostic apparatus also comprises: tutorial light, it is electrically connected to micro-control unit, is used for when there is fault in the SCR exhaust gas aftertreatment system, carries out the brightness prompting.
Especially, described micro-control unit is selected 16 MCU of Infineon.
Especially, described display screen is selected liquid crystal display panel.
Especially, described power supply is selected the rechargeable type lithium cell.
in the present invention, the CAN communication module is based on SAE-J1939 agreement and SCR exhaust gas aftertreatment system, motor is realized communication, read the status information of fault message and the motor of each sensor feedback in the SCR exhaust gas aftertreatment system, micro-control unit is analyzed the status information of described fault message and motor, judge the parameter of each parts in the SCR exhaust gas aftertreatment system, state, the Operational Limits of fault point and motor, and export to display screen and show, thereby judge fast and accurately the guilty culprit of SCR exhaust gas aftertreatment system, shorten trouble shooting time, realized SCR exhaust gas aftertreatment system parameter and state-detection, to the faut detection of SCR exhaust gas aftertreatment system and removing, but engine parameter is detected the setting that reaches calibrating parameters.
Description of drawings
The SCR exhaust gas aftertreatment system failure diagnostic apparatus structural drawing that Fig. 1 provides for the embodiment of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.Be understandable that, specific embodiment described herein only is used for explaining the present invention, but not limitation of the invention.Also need to prove in addition, for convenience of description, only show part related to the present invention in accompanying drawing but not full content.
Please refer to shown in Figure 1ly, in the present embodiment, SCR exhaust gas aftertreatment system failure diagnostic apparatus comprises: CAN communication module 101, micro-control unit 102, tutorial light 103, storage 104, display screen 105, keyboard 106 and power supply 107.
Described CAN communication module 101 is electrically connected to SCR exhaust gas aftertreatment system, motor, is used for obtaining the fault message of each sensor feedback of SCR exhaust gas aftertreatment system and the status information of motor.
CAN communication module 101 generally is made of CAN controller, CAN driver and center microprocessor.CAN communication module 101 carries out communication based on SAE-J1939 agreement and SCR exhaust gas aftertreatment system, motor.Each sensor in the SCR exhaust gas aftertreatment system, for example catalyst temperature sensor, urea temperature transducer, urea liquid level sensor, urea pump pressure transducer, NOx sensor are understood the fault message of each parts of Real-time Feedback, and are exported to micro-control unit 102 by CAN communication module 101 and carry out trouble analysis.Simultaneously, air mass sensor, speed probe etc. also can be exported to micro-control unit 102 by CAN communication module 101 with status informations such as motor ambient temperature, rotating speed, oil consumption and process.Wherein, described SAE-J1939 agreement is the proposed standard of american car engineering association (SAE), is used to the communication between electronic unit on medium and heavy road vehicle that the architecture of standard is provided.
Described micro-control unit 102 is electrically connected to CAN communication module 101, display screen 105, be used for the status information of described fault message and motor is analyzed, judge the Operational Limits of parameter, state, fault point and the motor of each parts in the SCR exhaust gas aftertreatment system, and export to display screen 105 demonstrations.
Micro-control unit described in the present embodiment 102 is selected 16 MCU of Infineon, and described display screen 105 is selected liquid crystal display panel.Micro-control unit 102 is when analyzing the status information of described fault message and motor, can read the motor message relevant to emission control, the fault point of comprehensive judgement SCR exhaust gas aftertreatment system, but and can be under the condition of rights of using license the dynamic setting calibrating parameters assist and carry out faut detection.
Described storage 104 is electrically connected to micro-control unit 102, for the Operational Limits of parameter, state, fault point and the motor of storing described each parts of SCR exhaust gas aftertreatment system.Can be stored in storage 104 the insides so that off-line analysis for some data of reusing.
Described tutorial light 103 is electrically connected to micro-control unit 102, is used for when there is fault in the SCR exhaust gas aftertreatment system, carries out the brightness prompting.
Described keyboard 106 is electrically connected to micro-control unit 102, is used for the input related control data, realizes reading of parameter and fault, and is shown on display screen 105.
By keyboard 106 input related control datas, carry out function and select, realize reading of SCR exhaust gas aftertreatment system fail frost frame parameter, reading and removing when prior fault and historical failure.
Described power supply 107 is electrically connected to micro-control unit 102, is used to this failure diagnostic apparatus power supply.Power supply described in the present embodiment 107 is selected the rechargeable type lithium cell.
Technological scheme of the present invention can be judged the guilty culprit of SCR exhaust gas aftertreatment system fast and accurately, shorten trouble shooting time, made up SCR after-treatment system field for the blank that lacks of failure diagnosis apparatus, and volume is little, easy to use and carry.
Note, above-mentioned is only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that to the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not break away from protection scope of the present invention.Therefore, although by above embodiment, the present invention is described in further detail, the present invention is not limited only to above embodiment, in the situation that do not break away from the present invention's design, can also comprise more other equivalent embodiments, and scope of the present invention is determined by appended claim scope.

Claims (5)

1. SCR exhaust gas aftertreatment system failure diagnostic apparatus, it is characterized in that, comprise: controller local area network (Controller Area Network, CAN) communication module, micro-control unit (Micro Control Unit, MCU), storage, display screen, keyboard and power supply;
Described CAN communication module is electrically connected to SCR exhaust gas aftertreatment system, motor, is used for obtaining the fault message of each sensor feedback of SCR exhaust gas aftertreatment system and the status information of motor;
Described micro-control unit is electrically connected to CAN communication module, display screen, be used for the status information of described fault message and motor is analyzed, judge the Operational Limits of parameter, state, fault point and the motor of each parts in the SCR exhaust gas aftertreatment system, and export to the display screen demonstration;
Described storage is electrically connected to micro-control unit, for the Operational Limits of parameter, state, fault point and the motor of storing described each parts of SCR exhaust gas aftertreatment system;
Described keyboard is electrically connected to micro-control unit, is used for the input related control data, realizes reading of parameter and fault, and is shown on display screen;
Described power supply is electrically connected to micro-control unit, is used to this failure diagnostic apparatus power supply.
2. SCR exhaust gas aftertreatment system failure diagnostic apparatus according to claim 1, is characterized in that, also comprises: tutorial light, it is electrically connected to micro-control unit, is used for when there is fault in the SCR exhaust gas aftertreatment system, carries out the brightness prompting.
3. SCR exhaust gas aftertreatment system failure diagnostic apparatus according to claim 1, is characterized in that, described micro-control unit is selected 16 MCU of Infineon.
4. SCR exhaust gas aftertreatment system failure diagnostic apparatus according to claim 1, is characterized in that, described display screen is selected liquid crystal display panel.
One of according to claim 1 to 4 described SCR exhaust gas aftertreatment system failure diagnostic apparatus, it is characterized in that, described power supply is selected the rechargeable type lithium cell.
CN201310101206.9A 2013-03-26 2013-03-26 A kind of SCR exhaust gas aftertreatment system failure diagnostic apparatus Active CN103147830B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527294A (en) * 2013-10-16 2014-01-22 潍柴动力股份有限公司 Postprocessing system control method, postprocessing electronic control unit and controller
CN104074581A (en) * 2014-06-11 2014-10-01 安徽华菱汽车有限公司 Error-reporting method, device and system
CN107060969A (en) * 2016-12-26 2017-08-18 潍柴动力空气净化科技有限公司 SCR spraying systems test device and method
CN108350790A (en) * 2015-10-30 2018-07-31 斗山发动机株式会社 The managing device and its control method of selective catalytic reduction system operating
CN109973186A (en) * 2019-03-28 2019-07-05 无锡威孚力达催化净化器有限责任公司 Gas helps formula urea metering pump service aid
CN111963287A (en) * 2020-08-21 2020-11-20 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

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CN102906404A (en) * 2010-05-25 2013-01-30 五十铃自动车株式会社 Scr system
CN202794888U (en) * 2012-07-10 2013-03-13 天津亿利汽车环保科技有限公司 Engine analog controller
CN203130214U (en) * 2013-03-26 2013-08-14 无锡市凯龙汽车设备制造有限公司 Fault diagnosis tester for SCR (silicon controlled rectifier) exhaust aftertreatment system

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CN2618803Y (en) * 2003-05-08 2004-06-02 安徽工程科技学院 Meter core circuit for network vehicle
US20100210700A1 (en) * 2007-05-08 2010-08-19 Schering Corporation Methods of treatment using intravenous formulations comprising temozolomide
CN101539559A (en) * 2009-04-30 2009-09-23 浙江大学 Portable automobile exhaust analyzer based on state IV standards and analytical method thereof
CN201583829U (en) * 2010-01-28 2010-09-15 北京能通金力环保科技有限公司 Heavy-duty vehicle tail gas monitoring system
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CN202794888U (en) * 2012-07-10 2013-03-13 天津亿利汽车环保科技有限公司 Engine analog controller
CN203130214U (en) * 2013-03-26 2013-08-14 无锡市凯龙汽车设备制造有限公司 Fault diagnosis tester for SCR (silicon controlled rectifier) exhaust aftertreatment system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527294A (en) * 2013-10-16 2014-01-22 潍柴动力股份有限公司 Postprocessing system control method, postprocessing electronic control unit and controller
CN104074581A (en) * 2014-06-11 2014-10-01 安徽华菱汽车有限公司 Error-reporting method, device and system
CN108350790A (en) * 2015-10-30 2018-07-31 斗山发动机株式会社 The managing device and its control method of selective catalytic reduction system operating
CN107060969A (en) * 2016-12-26 2017-08-18 潍柴动力空气净化科技有限公司 SCR spraying systems test device and method
CN109973186A (en) * 2019-03-28 2019-07-05 无锡威孚力达催化净化器有限责任公司 Gas helps formula urea metering pump service aid
CN111963287A (en) * 2020-08-21 2020-11-20 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

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Address after: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan Qianqiao Temple Tangqiao supporting area

Applicant after: Kailong High Technology Co., Ltd.

Address before: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan District Wuxi Tangqiao temple bridge supporting money Kailong Automobile Equipment Manufacturing Co Ltd

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Denomination of invention: A fault diagnosis instrument for SCR tail gas post-treatment system

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